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This review will summarise the achievements of Patient Organisations and Foundations started by affected Batten disease families, with an emphasis on their recent contribution to Batten disease, examine the benefits and pitfalls of their interactions with scientists and propose a way forward. V.Oligodendrocytes not only produce myelin to facilitate nerve impulse conduction, but are also essential metabolic partners of the axon. Oligodendrocyte loss and myelin destruction, as occurs in multiple sclerosis (MS), leaves axons vulnerable to degeneration and permanent neurological deficits ensue. Many studies now propose that lifestyle factors such as diet may impact demyelinating conditions, including MS. Most prior reviews have focused on the regulatory role of diet in the inflammatory events that drive MS pathogenesis, however the potential for dietary factors to modulate oligodendrocyte biology, myelin injury and myelin regeneration remain poorly understood. Here we review the current evidence from clinical and animal model studies regarding the impact of diet or dietary factors on myelin integrity and other pathogenic features of MS. Some limited evidence exists that certain foods may decrease risk or influence the progression of MS, such as increased intake of fish or polyunsaturated fatty acids, caloric restriction and fasting-mimicking diets. In addition, evidence suggests adolescent obesity or insufficient vitamin D levels increase the risk for developing MS. However, no clear or consistent evidence exists that dietary components exacerbate disease progression. Cumulatively, current evidence highlights the need for more extensive clinical trials to validate dietary effects on MS and to identify diets or supplements that may be beneficial as food-based strategies in the management of MS alone or in combination with conventional disease modifying therapies. Three new tuberostemoamide-type alkaloids, stemtuberolines A-C (1-3), four new stenine-type alkaloids, stemtuberolines D-G (4-7), together with five known Stemona alkaloids (8-12), were isolated from the roots of Stemona tuberosa. Their structures were elucidated on the basis of comprehensive spectroscopic data analysis. Stemtuberoline C (3) exhibited significant anti-TMV activity with an inhibition rate of 60.48% at the concentration of 50 μg/mL, while that of ningnamycin, the positive control, was 52.89%. V.The functional and structural concept of tight junctions has developed after discovery of claudin and TAMP proteins. Many of these proteins contribute to epi- and endothelial barrier but some, in contrast, form paracellular channels. Claudins form the backbone of tight junction (TJ) strands whereas other proteins regulate TJ dynamics. The current joined double-row model of TJ strands and channels is crucially based on the linear alignment of claudin-15 in the crystal. Molecular dynamics simulations, protein docking, mutagenesis, cellular TJ reconstitution, and electron microscopy studies largely support stability and functionality of the model. Here, we summarize in silico and in vitro data about TJ strand assembly including comparison of claudin crystal structures and alternative models. Sequence comparisons, experimental and structural data substantiate differentiation of classic and non-classic claudins differing in motifs related to strand assembly. Classic claudins seem to share a similar mechanism of strand formation. Interface variations likely contribute to TJ strand flexibility. Combined in vitro/in silico studies are expected to elucidate mechanistic keys determining TJ regulation. BACKGROUND Cancer patients are regarded as a highly vulnerable group in the current Coronavirus Disease 2019 (COVID-19) pandemic. To date, the clinical characteristics of COVID-19-infected cancer patients are largely unknown. PATIENTS AND METHODS In this retrospective cohort study, we included cancer patients with laboratory confirmed COVID-19 from three designated hospitals in Wuhan, China. The clinical data were collected from medical records from Jan 13, 2020, to Feb 26, 2020. Univariate and multivariate analyses were performed to assess the risk factors associated with severe events defined as a condition requiring admission to an intensive care unit, the use of mechanical ventilation, or death. RESULTS 28 COVID-19-infected cancer patients were included; 17 (60.7%) patients were male. Median age was 65.0 years (IQR56.0-70.0). Lung cancer was the most frequent cancer type (7, 25.0%). https://www.selleckchem.com/products/OSI-906.html 8 (28.6%) patients were suspected to be from hospital-associated transmission. The following clinical features were shown increased in case of COVID-19 co-infection. AIMS We sought to measure the effect of controlling body fat indexes on decreasing the incidence of type 2 diabetes mellitus (T2DM) mathematically. METHODS Study samples were selected from a well-established cohort in Suzhou, China between 2004 and 2008, comprising 6364 males and 9678 females. The questionnaire contained socio-demographic characteristics, smoking, alcohol consumption, diet, physical activity, personal and family medical history and current medication. Multiple linear regression, Cox regression and mediation analyses were performed to determine the relationship among age, body fat indexes and T2DM onset. RESULTS All the three body fat indexes [the body mass index (BMI), waist-to-hip ratio (WHR) and body fat percentage] showed a significant positive association (P less then 0.05) with age and T2DM. Significant indirect effects (IE) were detected for age, which were mediated respectively through WHR [IE=1.10, 95%CI 1.07-1.13; P less then 0.001], the BMI (IE=1.15, 95%CI 1.11-1.18; P less then 0.001), and body fat percentage (IE=1.09, 95%CI 1.07-1.12; P less then 0.001). The combined body fat index score demonstrated a significant association with age (P less then 0.001) and a stronger relationship with the onset of diabetes (P less then 0.001) along with a significant mediating effect (IE=1.17; 95%CI 1.13-1.22; P less then 0.001). The total effect of age on T2DM was 1.60 (95%CI 1.21-2.10; P=0.0008). As a result, the three body fat indexes jointly mediated 33.97% of the age impact on diabetes onset. CONCLUSIONS This pilot study revealed important roles for body fat indexes in mediating the age pathway to the onset of diabetes. Controling body fat in the appropriate range could reduce 33.97% of the risk of T2DM onset with increasing age.
This review will summarise the achievements of Patient Organisations and Foundations started by affected Batten disease families, with an emphasis on their recent contribution to Batten disease, examine the benefits and pitfalls of their interactions with scientists and propose a way forward. V.Oligodendrocytes not only produce myelin to facilitate nerve impulse conduction, but are also essential metabolic partners of the axon. Oligodendrocyte loss and myelin destruction, as occurs in multiple sclerosis (MS), leaves axons vulnerable to degeneration and permanent neurological deficits ensue. Many studies now propose that lifestyle factors such as diet may impact demyelinating conditions, including MS. Most prior reviews have focused on the regulatory role of diet in the inflammatory events that drive MS pathogenesis, however the potential for dietary factors to modulate oligodendrocyte biology, myelin injury and myelin regeneration remain poorly understood. Here we review the current evidence from clinical and animal model studies regarding the impact of diet or dietary factors on myelin integrity and other pathogenic features of MS. Some limited evidence exists that certain foods may decrease risk or influence the progression of MS, such as increased intake of fish or polyunsaturated fatty acids, caloric restriction and fasting-mimicking diets. In addition, evidence suggests adolescent obesity or insufficient vitamin D levels increase the risk for developing MS. However, no clear or consistent evidence exists that dietary components exacerbate disease progression. Cumulatively, current evidence highlights the need for more extensive clinical trials to validate dietary effects on MS and to identify diets or supplements that may be beneficial as food-based strategies in the management of MS alone or in combination with conventional disease modifying therapies. Three new tuberostemoamide-type alkaloids, stemtuberolines A-C (1-3), four new stenine-type alkaloids, stemtuberolines D-G (4-7), together with five known Stemona alkaloids (8-12), were isolated from the roots of Stemona tuberosa. Their structures were elucidated on the basis of comprehensive spectroscopic data analysis. Stemtuberoline C (3) exhibited significant anti-TMV activity with an inhibition rate of 60.48% at the concentration of 50 μg/mL, while that of ningnamycin, the positive control, was 52.89%. V.The functional and structural concept of tight junctions has developed after discovery of claudin and TAMP proteins. Many of these proteins contribute to epi- and endothelial barrier but some, in contrast, form paracellular channels. Claudins form the backbone of tight junction (TJ) strands whereas other proteins regulate TJ dynamics. The current joined double-row model of TJ strands and channels is crucially based on the linear alignment of claudin-15 in the crystal. Molecular dynamics simulations, protein docking, mutagenesis, cellular TJ reconstitution, and electron microscopy studies largely support stability and functionality of the model. Here, we summarize in silico and in vitro data about TJ strand assembly including comparison of claudin crystal structures and alternative models. Sequence comparisons, experimental and structural data substantiate differentiation of classic and non-classic claudins differing in motifs related to strand assembly. Classic claudins seem to share a similar mechanism of strand formation. Interface variations likely contribute to TJ strand flexibility. Combined in vitro/in silico studies are expected to elucidate mechanistic keys determining TJ regulation. BACKGROUND Cancer patients are regarded as a highly vulnerable group in the current Coronavirus Disease 2019 (COVID-19) pandemic. To date, the clinical characteristics of COVID-19-infected cancer patients are largely unknown. PATIENTS AND METHODS In this retrospective cohort study, we included cancer patients with laboratory confirmed COVID-19 from three designated hospitals in Wuhan, China. The clinical data were collected from medical records from Jan 13, 2020, to Feb 26, 2020. Univariate and multivariate analyses were performed to assess the risk factors associated with severe events defined as a condition requiring admission to an intensive care unit, the use of mechanical ventilation, or death. RESULTS 28 COVID-19-infected cancer patients were included; 17 (60.7%) patients were male. Median age was 65.0 years (IQR56.0-70.0). Lung cancer was the most frequent cancer type (7, 25.0%). https://www.selleckchem.com/products/OSI-906.html 8 (28.6%) patients were suspected to be from hospital-associated transmission. The following clinical features were shown increased in case of COVID-19 co-infection. AIMS We sought to measure the effect of controlling body fat indexes on decreasing the incidence of type 2 diabetes mellitus (T2DM) mathematically. METHODS Study samples were selected from a well-established cohort in Suzhou, China between 2004 and 2008, comprising 6364 males and 9678 females. The questionnaire contained socio-demographic characteristics, smoking, alcohol consumption, diet, physical activity, personal and family medical history and current medication. Multiple linear regression, Cox regression and mediation analyses were performed to determine the relationship among age, body fat indexes and T2DM onset. RESULTS All the three body fat indexes [the body mass index (BMI), waist-to-hip ratio (WHR) and body fat percentage] showed a significant positive association (P less then 0.05) with age and T2DM. Significant indirect effects (IE) were detected for age, which were mediated respectively through WHR [IE=1.10, 95%CI 1.07-1.13; P less then 0.001], the BMI (IE=1.15, 95%CI 1.11-1.18; P less then 0.001), and body fat percentage (IE=1.09, 95%CI 1.07-1.12; P less then 0.001). The combined body fat index score demonstrated a significant association with age (P less then 0.001) and a stronger relationship with the onset of diabetes (P less then 0.001) along with a significant mediating effect (IE=1.17; 95%CI 1.13-1.22; P less then 0.001). The total effect of age on T2DM was 1.60 (95%CI 1.21-2.10; P=0.0008). As a result, the three body fat indexes jointly mediated 33.97% of the age impact on diabetes onset. CONCLUSIONS This pilot study revealed important roles for body fat indexes in mediating the age pathway to the onset of diabetes. Controling body fat in the appropriate range could reduce 33.97% of the risk of T2DM onset with increasing age.0 Commentarii 0 Distribuiri 4 Views 0 previzualizareVă rugăm să vă autentificați pentru a vă dori, partaja și comenta! -
The expected positive effects of both sulfur doping and rGO on charge recombination were found to be limited because of the subpar interphase contact with the composite and incomplete reduction of the GO precursor. Consequent unfavorable interactions between rGO and DCF negatively influenced the activity of the studied S-TiO2/rGO photocatalyst under simulated solar irradiation.The molecular complexity of host-pathogen interactions remains poorly understood in many infectious diseases, particularly in humans due to the limited availability of reliable and specific experimental models. To bridge the gap between classical two-dimensional culture systems, which often involve transformed cell lines that may not have all the physiologic properties of primary cells, and in vivo animal studies, researchers have developed the organoid model system. Organoids are complex three-dimensional structures that are generated in vitro from primary cells and can recapitulate key in vivo properties of an organ such as structural organization, multicellularity, and function. In this review, we discuss how organoids have been deployed in exploring Salmonella infection in **** and humans. In addition, we summarize the recent advancements that hold promise to elevate our understanding of the interactions and crosstalk between multiple cell types and the microbiota with Salmonella. These models have the potential for improving clinical outcomes and future prophylactic and therapeutic intervention strategies.About eight years ago, a new automation approach and flow technique called "Lab-In-Syringe" was proposed. It was derived from previous flow techniques, all based on handling reagent and sample solutions in a flow manifold. To date Lab-In-Syringe has evidently gained the interest of researchers in many countries, with new modifications, operation modes, and technical improvements still popping up. It has proven to be a versatile tool for the automation of sample preparation, particularly, liquid-phase microextraction approaches. This article aims to assist newcomers to this technique in system planning and setup by overviewing the different options for configurations, limitations, and feasible operations. This includes syringe orientation, in-syringe stirring modes, in-syringe detection, additional inlets, and addable features. The authors give also a chronological overview of technical milestones and a critical explanation on the potentials and shortcomings of this technique, calculations of characteristics, and tips and tricks on method development. Moreover, a comprehensive overview of the different operation modes of Lab-In-Syringe automated sample pretreatment is given focusing on the technical aspects and challenges of the related operations. We further deal with possibilities on how to fabricate required or useful system components, in particular by 3D printing technology, with over 20 different elements exemplarily shown. Finally, a short discussion on shortcomings and required improvements is given.A series of 3-benzylidenechrmanones 1, 3, 5, 7, 9 and their spiropyrazoline analogues 2, 4, 6, 8, 10 were synthesized. X-ray analysis confirms that compounds 2 and 8 crystallize in a monoclinic system in P21/n space groups with one and three molecules in each asymmetric unit. The crystal lattice of the analyzed compounds is enhanced by hydrogen bonds. The primary aim of the study was to evaluate the anti-proliferative potential of 3-benzylidenechromanones and their spiropyrazoline analogues towards four cancer cell lines. Our results indicate that parent compounds 1 and 9 with a phenyl ring at C2 have lower cytotoxic activity against cancer cell lines than their spiropyrazolines analogues. Analysis of IC50 values showed that the compounds 3 and 7 exhibited higher cytotoxic activity against cancer cells, being more active than the reference compound (4-chromanone or quercetin). The results of this study indicate that the incorporation of a pyrazoline ring into the 3-arylideneflavanone results in an improvement of the compounds' activity and therefore it may be of use in the search of new anticancer agents. Further analysis allowed us to demonstrate the compounds to have a strong inhibitory effect on the cell cycle. For instance, compounds 2, 10 induced 60% of HL-60 cells to be arrested in G2/M phase. Using a DNA-cleavage protection assay we also demonstrated that tested compounds interact with DNA. All compounds at the concentrations corresponding to cytotoxic properties are not toxic towards red blood cells, and do not contribute to hemolysis of RBCs.There is a strong need in the industry to develop lead-free piezoelectrics for sensors and actuators. Although these materials have become an important component of many electronic devices, it is very important for the industry to decarbonise ceramic technology, especially through the introduction of modern sintering technologies. Among the many piezoelectric compounds available, Calcium Barium Titanate (BCT) have been widely investigated because of its similar performance to lead-containing Lead Titanate Zirconate (PZT). In this paper, a modified Pechini method for obtaining ceramic Ba0.9Ca0.1TiO3 nano-powders is described. Deviation from the established procedure resulted in the precipitation of the solution or obtaining of a low-quality (poorly crystallized) product with numerous impurities. The samples of BCT materials were examined to find their ideal microstructures and structures; these factors were confirmed by their outstanding X-ray diffraction spectra and high piezoelectric constant values that are comparable to commercial lead-containing materials.The structural, thermal, electrical and mechanical properties of fully dense ****ceramics, sintered using Spark Plasma Sintering (SPS), were studied and compared to the properties of ****ceramics previously published in the literature. https://www.selleckchem.com/EGFR(HER).html New results on ****s mechanical responses were obtained by nanoindentation and ring-on-ring biaxial strength testing. The findings contribute to a more complete knowledge of the properties of ****ceramics, an important material in many industrial applications.
The expected positive effects of both sulfur doping and rGO on charge recombination were found to be limited because of the subpar interphase contact with the composite and incomplete reduction of the GO precursor. Consequent unfavorable interactions between rGO and DCF negatively influenced the activity of the studied S-TiO2/rGO photocatalyst under simulated solar irradiation.The molecular complexity of host-pathogen interactions remains poorly understood in many infectious diseases, particularly in humans due to the limited availability of reliable and specific experimental models. To bridge the gap between classical two-dimensional culture systems, which often involve transformed cell lines that may not have all the physiologic properties of primary cells, and in vivo animal studies, researchers have developed the organoid model system. Organoids are complex three-dimensional structures that are generated in vitro from primary cells and can recapitulate key in vivo properties of an organ such as structural organization, multicellularity, and function. In this review, we discuss how organoids have been deployed in exploring Salmonella infection in mice and humans. In addition, we summarize the recent advancements that hold promise to elevate our understanding of the interactions and crosstalk between multiple cell types and the microbiota with Salmonella. These models have the potential for improving clinical outcomes and future prophylactic and therapeutic intervention strategies.About eight years ago, a new automation approach and flow technique called "Lab-In-Syringe" was proposed. It was derived from previous flow techniques, all based on handling reagent and sample solutions in a flow manifold. To date Lab-In-Syringe has evidently gained the interest of researchers in many countries, with new modifications, operation modes, and technical improvements still popping up. It has proven to be a versatile tool for the automation of sample preparation, particularly, liquid-phase microextraction approaches. This article aims to assist newcomers to this technique in system planning and setup by overviewing the different options for configurations, limitations, and feasible operations. This includes syringe orientation, in-syringe stirring modes, in-syringe detection, additional inlets, and addable features. The authors give also a chronological overview of technical milestones and a critical explanation on the potentials and shortcomings of this technique, calculations of characteristics, and tips and tricks on method development. Moreover, a comprehensive overview of the different operation modes of Lab-In-Syringe automated sample pretreatment is given focusing on the technical aspects and challenges of the related operations. We further deal with possibilities on how to fabricate required or useful system components, in particular by 3D printing technology, with over 20 different elements exemplarily shown. Finally, a short discussion on shortcomings and required improvements is given.A series of 3-benzylidenechrmanones 1, 3, 5, 7, 9 and their spiropyrazoline analogues 2, 4, 6, 8, 10 were synthesized. X-ray analysis confirms that compounds 2 and 8 crystallize in a monoclinic system in P21/n space groups with one and three molecules in each asymmetric unit. The crystal lattice of the analyzed compounds is enhanced by hydrogen bonds. The primary aim of the study was to evaluate the anti-proliferative potential of 3-benzylidenechromanones and their spiropyrazoline analogues towards four cancer cell lines. Our results indicate that parent compounds 1 and 9 with a phenyl ring at C2 have lower cytotoxic activity against cancer cell lines than their spiropyrazolines analogues. Analysis of IC50 values showed that the compounds 3 and 7 exhibited higher cytotoxic activity against cancer cells, being more active than the reference compound (4-chromanone or quercetin). The results of this study indicate that the incorporation of a pyrazoline ring into the 3-arylideneflavanone results in an improvement of the compounds' activity and therefore it may be of use in the search of new anticancer agents. Further analysis allowed us to demonstrate the compounds to have a strong inhibitory effect on the cell cycle. For instance, compounds 2, 10 induced 60% of HL-60 cells to be arrested in G2/M phase. Using a DNA-cleavage protection assay we also demonstrated that tested compounds interact with DNA. All compounds at the concentrations corresponding to cytotoxic properties are not toxic towards red blood cells, and do not contribute to hemolysis of RBCs.There is a strong need in the industry to develop lead-free piezoelectrics for sensors and actuators. Although these materials have become an important component of many electronic devices, it is very important for the industry to decarbonise ceramic technology, especially through the introduction of modern sintering technologies. Among the many piezoelectric compounds available, Calcium Barium Titanate (BCT) have been widely investigated because of its similar performance to lead-containing Lead Titanate Zirconate (PZT). In this paper, a modified Pechini method for obtaining ceramic Ba0.9Ca0.1TiO3 nano-powders is described. Deviation from the established procedure resulted in the precipitation of the solution or obtaining of a low-quality (poorly crystallized) product with numerous impurities. The samples of BCT materials were examined to find their ideal microstructures and structures; these factors were confirmed by their outstanding X-ray diffraction spectra and high piezoelectric constant values that are comparable to commercial lead-containing materials.The structural, thermal, electrical and mechanical properties of fully dense B4C ceramics, sintered using Spark Plasma Sintering (SPS), were studied and compared to the properties of B4C ceramics previously published in the literature. https://www.selleckchem.com/EGFR(HER).html New results on B4C's mechanical responses were obtained by nanoindentation and ring-on-ring biaxial strength testing. The findings contribute to a more complete knowledge of the properties of B4C ceramics, an important material in many industrial applications.0 Commentarii 0 Distribuiri 14 Views 0 previzualizare -
The authors identified the key characteristics of the Jackson Heart Study Community Outreach Center as it worked to embed a sustainable, positive impact on the surrounding communities by engaging community partners to facilitate the mission of the Jackson Heart Study. This report provides an overview of the practice and infrastructure.Ernest Everett Just is celebrated for his contributions to cell biology. Among other firsts, he was first to describe the "wave of negativity" spreading around an egg cell from the entrance point of the fertilizing spermatozoon. His accomplishments in biology are celebrated in Black Apollo of Science (1983) by Kenneth Manning, and by a 1996 Black Heritage postage stamp. What is not yet widely appreciated, however, is that Just connected evolutionary biology to ethical behavior (1933, 1939, 1940). https://www.selleckchem.com/products/epacadostat-incb024360.html He was probably the first cell biologist to argue that human ethical behavior evolved from our very most primitive cellular origins. Today, Just's contributions to evolutionary bioethics, including "the law of environmental dependence," can be better appreciated because his unpublished booklength manuscript, "The Origin of Man's Ethical Behavior" has been preserved at Howard University's Moorland-Spingarn Research Center.OBJECTIVE To evaluate provider acceptance of pharmacist interventions within the Discharge Companion Program (DCP) and its association with hospital readmissions. METHODS This retrospective record review included patients referred to the DCP between January and October 2018. DCP pharmacists' interventions were assessed for provider acceptance on follow-up consultation or readmission. A chi-square test assessed the association between provider acceptance, communication modality, and technology used. A logistic regression model assessed the association between readmission risk and variables of interest. An a priori alpha level of 0.05 was used. RESULTS Of the 197 patients referred to the DCP, 102 met inclusion criteria. DCP pharmacists made a total of 271 interventions; 185 (68.7%) required provider action. The most common intervention type was medication addition or discontinuation (n = 74, 40%); the communication mode was between DCP nurses and primary care provider offices or skilled nursing facilities (n = ing provider acceptance of pharmacist recommendations on 30-day readmission reduction. The abnormal inflammatory responses due to the lung tissue damage and ineffective repair/resolution in response to the inhaled toxicants result in the pathological changes associated with chronic respiratory diseases. Investigation of such pathophysiological mechanisms provides the opportunity to develop the molecular phenotype-specific diagnostic assays and could help in designing the personalized medicine-based therapeutic approaches against these prevalent diseases. As the central hubs of cell metabolism and energetics, mitochondria integrate cellular responses and interorganellar signaling pathways to maintain cellular and extracellular redox status and the cellular senescence that dictate the lung tissue responses. Specifically, as observed in chronic obstructive pulmonary disease (COPD) and pulmonary fibrosis, the mitochondria-endoplasmic reticulum (ER) crosstalk is disrupted by the inhaled toxicants such as the combustible and emerging electronic nicotine-delivery system (ENDS) tobacco products. Thus, the recent research efforts have focused on understanding how the mitochondria-ER dysfunctions and oxidative stress responses can be targeted to improve inflammatory and cellular dysfunctions associated with these pathologic illnesses that are exacerbated by viral infections. The present review assesses the importance of these redox signaling and cellular senescence pathways that describe the role of mitochondria and ER on the development and function of lung epithelial responses, highlighting the cause and effect associations that reflect the disease pathogenesis and possible intervention strategies. V.TFEB (transcription factor EB) and TFE3 (transcription factor E3) are "master regulators" of autophagy and lysosomal biogenesis. The stress response p38 mitogen-activated protein (MAP) kinases affect multiple intracellular responses including inflammation, cell growth, differentiation, cell death, senescence, tumorigenesis, and autophagy. Small molecule p38 MAP kinase inhibitors such as SB202190 are widely used in dissection of related signal transduction mechanisms including redox biology and autophagy. Here, we initially aimed to investigate the links between p38 MAP kinase and TFEB/TFE3-mediated autophagy and lysosomal biogenesis. Unexpectedly, we found that only SB202190, rather than several other p38 inhibitors, promotes TFEB and TFE3 to translocate from the cytosol into the nucleus and subsequently enhances autophagy and lysosomal biogenesis. In addition, siRNA-mediated Tfeb and Tfe3 knockdown effectively attenuated SB202190-induced gene expression and lysosomal biogenesis. Mechanistical studies showed ts potential effect on activating autophagy-lysosomal axis. BACKGROUND Patients with metastatic renal cell carcinoma (****) may present with primary metastases (synchronous disease) or develop metastases during follow-up (metachronous disease). The impact of time to metastasis on patient outcome is poorly characterised. OBJECTIVE To characterise overall survival (OS) and time to treatment failure (TTF) based on time to metastasis in **** patients treated with targeted therapy (tyrosine kinase inhibitors [TKIs]). DESIGN, SETTING, AND PARTICIPANTS We used the International Metastatic Renal Cell Carcinoma Database Consortium (IMDC) to compare synchronous (metastases within ≤3 mo of initial diagnosis of cancer) versus metachronous disease (evaluated by >3-12 mo, >1-2 yr, >2-7 yr, and >7 yr intervals). OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS OS and TFF were assessed using Kaplan-Meier curves. Cox multivariable regressions analyses (MVAs) were adjusted for baseline factors. RESULTS AND LIMITATIONS Of 7386 patients with **** treated with first-line TKIs, 3906 (53%) andstatic outbreak on survival outcomes in kidney cancer patients treated with targeted therapy. We found that the longer time to metastatic development was associated with improved outcome.
The authors identified the key characteristics of the Jackson Heart Study Community Outreach Center as it worked to embed a sustainable, positive impact on the surrounding communities by engaging community partners to facilitate the mission of the Jackson Heart Study. This report provides an overview of the practice and infrastructure.Ernest Everett Just is celebrated for his contributions to cell biology. Among other firsts, he was first to describe the "wave of negativity" spreading around an egg cell from the entrance point of the fertilizing spermatozoon. His accomplishments in biology are celebrated in Black Apollo of Science (1983) by Kenneth Manning, and by a 1996 Black Heritage postage stamp. What is not yet widely appreciated, however, is that Just connected evolutionary biology to ethical behavior (1933, 1939, 1940). https://www.selleckchem.com/products/epacadostat-incb024360.html He was probably the first cell biologist to argue that human ethical behavior evolved from our very most primitive cellular origins. Today, Just's contributions to evolutionary bioethics, including "the law of environmental dependence," can be better appreciated because his unpublished booklength manuscript, "The Origin of Man's Ethical Behavior" has been preserved at Howard University's Moorland-Spingarn Research Center.OBJECTIVE To evaluate provider acceptance of pharmacist interventions within the Discharge Companion Program (DCP) and its association with hospital readmissions. METHODS This retrospective record review included patients referred to the DCP between January and October 2018. DCP pharmacists' interventions were assessed for provider acceptance on follow-up consultation or readmission. A chi-square test assessed the association between provider acceptance, communication modality, and technology used. A logistic regression model assessed the association between readmission risk and variables of interest. An a priori alpha level of 0.05 was used. RESULTS Of the 197 patients referred to the DCP, 102 met inclusion criteria. DCP pharmacists made a total of 271 interventions; 185 (68.7%) required provider action. The most common intervention type was medication addition or discontinuation (n = 74, 40%); the communication mode was between DCP nurses and primary care provider offices or skilled nursing facilities (n = ing provider acceptance of pharmacist recommendations on 30-day readmission reduction. The abnormal inflammatory responses due to the lung tissue damage and ineffective repair/resolution in response to the inhaled toxicants result in the pathological changes associated with chronic respiratory diseases. Investigation of such pathophysiological mechanisms provides the opportunity to develop the molecular phenotype-specific diagnostic assays and could help in designing the personalized medicine-based therapeutic approaches against these prevalent diseases. As the central hubs of cell metabolism and energetics, mitochondria integrate cellular responses and interorganellar signaling pathways to maintain cellular and extracellular redox status and the cellular senescence that dictate the lung tissue responses. Specifically, as observed in chronic obstructive pulmonary disease (COPD) and pulmonary fibrosis, the mitochondria-endoplasmic reticulum (ER) crosstalk is disrupted by the inhaled toxicants such as the combustible and emerging electronic nicotine-delivery system (ENDS) tobacco products. Thus, the recent research efforts have focused on understanding how the mitochondria-ER dysfunctions and oxidative stress responses can be targeted to improve inflammatory and cellular dysfunctions associated with these pathologic illnesses that are exacerbated by viral infections. The present review assesses the importance of these redox signaling and cellular senescence pathways that describe the role of mitochondria and ER on the development and function of lung epithelial responses, highlighting the cause and effect associations that reflect the disease pathogenesis and possible intervention strategies. V.TFEB (transcription factor EB) and TFE3 (transcription factor E3) are "master regulators" of autophagy and lysosomal biogenesis. The stress response p38 mitogen-activated protein (MAP) kinases affect multiple intracellular responses including inflammation, cell growth, differentiation, cell death, senescence, tumorigenesis, and autophagy. Small molecule p38 MAP kinase inhibitors such as SB202190 are widely used in dissection of related signal transduction mechanisms including redox biology and autophagy. Here, we initially aimed to investigate the links between p38 MAP kinase and TFEB/TFE3-mediated autophagy and lysosomal biogenesis. Unexpectedly, we found that only SB202190, rather than several other p38 inhibitors, promotes TFEB and TFE3 to translocate from the cytosol into the nucleus and subsequently enhances autophagy and lysosomal biogenesis. In addition, siRNA-mediated Tfeb and Tfe3 knockdown effectively attenuated SB202190-induced gene expression and lysosomal biogenesis. Mechanistical studies showed ts potential effect on activating autophagy-lysosomal axis. BACKGROUND Patients with metastatic renal cell carcinoma (mRCC) may present with primary metastases (synchronous disease) or develop metastases during follow-up (metachronous disease). The impact of time to metastasis on patient outcome is poorly characterised. OBJECTIVE To characterise overall survival (OS) and time to treatment failure (TTF) based on time to metastasis in mRCC patients treated with targeted therapy (tyrosine kinase inhibitors [TKIs]). DESIGN, SETTING, AND PARTICIPANTS We used the International Metastatic Renal Cell Carcinoma Database Consortium (IMDC) to compare synchronous (metastases within ≤3 mo of initial diagnosis of cancer) versus metachronous disease (evaluated by >3-12 mo, >1-2 yr, >2-7 yr, and >7 yr intervals). OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS OS and TFF were assessed using Kaplan-Meier curves. Cox multivariable regressions analyses (MVAs) were adjusted for baseline factors. RESULTS AND LIMITATIONS Of 7386 patients with mRCC treated with first-line TKIs, 3906 (53%) andstatic outbreak on survival outcomes in kidney cancer patients treated with targeted therapy. We found that the longer time to metastatic development was associated with improved outcome.0 Commentarii 0 Distribuiri 15 Views 0 previzualizare -
Objective T2-signal intensity and somatostatin (SST) receptor expression are recognized predictors of therapy response in acromegaly. We investigated the relationship between these predictors and the hormonal and tumoral responses to long-acting pasireotide (PAS-LAR) therapy, which were also compared with responsiveness to first-generation somatostatin receptor ligands (SRLs). Design The PAPE study is a cohort study. Methods We included 45 acromegaly patients initially receiving SRLs, followed by combination therapy with pegvisomant, and finally PAS-LAR. We assessed tumor volume reduction (≥25% from baseline), IGF-1 levels (expressed as the upper limit of normal), and T2-weighted MRI signal and SST receptor expression of the adenoma. Results Patients with significant tumor shrinkage during PAS-LAR showed higher IGF-1 levels during PAS-LAR (mean (S.D.) 1.36 (0.53) vs 0.93 (0.43), P = 0.020), less IGF-1 reduction after first-generation SRLs (mean (S.D.) 0.55 (0.71) vs 1.25 (1.07), P = 0.028), and lower SST2 receptor expression (median (IQR) 2.0 (1.0-6.0) vs 12.0 (7.5-12.0), P = 0.040). Overall, T2-signal intensity ratio was increased compared with baseline (mean (S.D.) 1.39 (0.56) vs 1.25 (0.52), P = 0.017) and a higher T2-signal was associated with lower IGF-1 levels during PAS-LAR (β -0.29, 95% CI -0.56 to -0.01, P = 0.045). A subset of PAS-LAR treated patients with increased T2-signal intensity achieved greater reduction of IGF-1 (mean (S.D.) 0.80 (0.60) vs 0.45 (0.39), P = 0.016). Conclusions Patients unresponsive to SRLs with a lower SST2 receptor expression are more prone to achieve tumor shrinkage during PAS-LAR. Surprisingly, tumor shrinkage is not accompanied by a biochemical response, which is accompanied with a higher T2-signal intensity.in English, French, RÉSUMÉ Contexte Rares sont les études qui examinent le rôle des cliniciens dans l'expérience de l'avortement au Ghana. https://www.selleckchem.com/btk.html Il peut être utile d'examiner comment les cliniciens comprennent l'objection de conscience à l'avortement — c.-à-d. le droit de refuser la prestation d'un avortement légal sur la base de croyances morales ou personnelles —, afin de mieux gérer la pratique. Méthodes Huit entretiens en profondeur et quatre discussions de groupe ont été menés avec 14 médecins et 20 sages-femmes de structures sanitaires des régions Orientale et de la Volta au Ghana, en mai 2018. Les guides de ces entretiens semistructurés couvraient des questions telles que la compréhension du concept d'objection de conscience par les cliniciens, sa pratique et ses conséquences pour les prestataires et les patientes. Les données ont été analysées par analyse thématique. Résultats La plupart des cliniciens ne comprenaient pas l'expression « objection de conscience »; les sages-femmes étaient mieux informées surmiter l'abus du droit d'objection des cliniciens et à améliorer les soins de santé reproductive des femmes au Ghana.in English, French, RÉSUMÉ Contexte Dans une grande partie de l'Afrique subsaharienne et de l'Amérique latine, l'avortement est limité par la loi et ses prestataires sont en proie à la stigmatisation et au péril judiciaire. Comme l'indiquent les études, l'intervention du groupe Providers Share Workshop réduit cette stigmatisation aux États-Unis; elle n'a cependant pas été évaluée dans d'autres contextes. Méthodes En 2014–2015, l'atelier Providers Share Workshop a été adapté et piloté auprès de 59 membres du personnel de soins de l'avortement de trois pays d'Afrique subsaharienne et 93 soignants de sept pays d'Amérique latine. Les données d'enquête collectées avant, directement après et six mois après chaque atelier ont mesuré la stigmatisation, les attitudes et l'engagement de sécurité et de défense juridique sur la base des questions originales et d'échelles adaptées. Les changements de résultats au fil du temps, et entre les caractéristiques démographiques et les résultats, ont été mesurés par analyses univue (–1,5). Conclusions L'atelier Providers Share Workshop est une intervention prometteuse de soutien du personnel de soins de l'avortement en Afrique subsaharienne et en Amérique latine.in English, French, RÉSUMÉ Contexte L'infertilité perçue — le fait de croire, pour une personne, qu'elle ne peut pas concevoir ou causer une grossesse — peut conduire, entre autres préoccupations, à l'absence de contraception et à la grossesse non planifiée, sans toutefois avoir été largement étudiée dans les contextes à faible revenu. Méthodes Une mesure de l'infertilité perçue utilisée précédemment aux États-Unis a été incluse dans une enquête menée en 2015 auprès de jeunes adultes de Balaka (Malawi). La prévalence d'une éventuelle infertilité perçue (c'est-à-dire croire qu'il est légèrement ou fortement probable qu'on soit infertile, ou qu'on aurait des difficultés à concevoir ou à causer la grossesse d'une partenaire; IPP) a été estimée dans l‘échantillon analytique de l‘étude, composé de 1 064 femmes et de 527 hommes âgés de 21 à 29 ans. Les variables associées à l'IPP ont été identifiées par régression logistique multivariable. Les raisons d'IPP données par les répondants et leurs estimations de la probles connaissances sur les probabilités de grossesse et le retour à la fertilité après l'arrêt de la contraception peuvent réduire les préoccupations concernant l'infertilité perçue.Insect pollinators are becoming visible to societies. Many peer-reviewed papers evidence biophysical and ecological aspects of managed and non-managed insect pollinators. Evidence on stressors of declines yield peer-reviewed calls for action. Yet, insect pollinator declines are inherently a human issue, driven by a history of land-use trends, changes in technologies, and socio-cultural perceptions that unwittingly cause and perpetuate declines. Conservation requires integrating social and ecological understandings to reconfigure human behaviors across societies' sectors. We review recent literature on the social and cultural dimensions of insect pollinators. People now like bees. We discuss the social challenges and opportunities that accompany this newfound public enthusiasm. These include the generalization of honey bees as representative of bee diversity and pollinator conservation issues, the changing perceptions of pollinators, the paucity of policy research, and how any call to 'save the bees' must be a call to stabilize agriculture.
Objective T2-signal intensity and somatostatin (SST) receptor expression are recognized predictors of therapy response in acromegaly. We investigated the relationship between these predictors and the hormonal and tumoral responses to long-acting pasireotide (PAS-LAR) therapy, which were also compared with responsiveness to first-generation somatostatin receptor ligands (SRLs). Design The PAPE study is a cohort study. Methods We included 45 acromegaly patients initially receiving SRLs, followed by combination therapy with pegvisomant, and finally PAS-LAR. We assessed tumor volume reduction (≥25% from baseline), IGF-1 levels (expressed as the upper limit of normal), and T2-weighted MRI signal and SST receptor expression of the adenoma. Results Patients with significant tumor shrinkage during PAS-LAR showed higher IGF-1 levels during PAS-LAR (mean (S.D.) 1.36 (0.53) vs 0.93 (0.43), P = 0.020), less IGF-1 reduction after first-generation SRLs (mean (S.D.) 0.55 (0.71) vs 1.25 (1.07), P = 0.028), and lower SST2 receptor expression (median (IQR) 2.0 (1.0-6.0) vs 12.0 (7.5-12.0), P = 0.040). Overall, T2-signal intensity ratio was increased compared with baseline (mean (S.D.) 1.39 (0.56) vs 1.25 (0.52), P = 0.017) and a higher T2-signal was associated with lower IGF-1 levels during PAS-LAR (β -0.29, 95% CI -0.56 to -0.01, P = 0.045). A subset of PAS-LAR treated patients with increased T2-signal intensity achieved greater reduction of IGF-1 (mean (S.D.) 0.80 (0.60) vs 0.45 (0.39), P = 0.016). Conclusions Patients unresponsive to SRLs with a lower SST2 receptor expression are more prone to achieve tumor shrinkage during PAS-LAR. Surprisingly, tumor shrinkage is not accompanied by a biochemical response, which is accompanied with a higher T2-signal intensity.in English, French, RÉSUMÉ Contexte Rares sont les études qui examinent le rôle des cliniciens dans l'expérience de l'avortement au Ghana. https://www.selleckchem.com/btk.html Il peut être utile d'examiner comment les cliniciens comprennent l'objection de conscience à l'avortement — c.-à-d. le droit de refuser la prestation d'un avortement légal sur la base de croyances morales ou personnelles —, afin de mieux gérer la pratique. Méthodes Huit entretiens en profondeur et quatre discussions de groupe ont été menés avec 14 médecins et 20 sages-femmes de structures sanitaires des régions Orientale et de la Volta au Ghana, en mai 2018. Les guides de ces entretiens semistructurés couvraient des questions telles que la compréhension du concept d'objection de conscience par les cliniciens, sa pratique et ses conséquences pour les prestataires et les patientes. Les données ont été analysées par analyse thématique. Résultats La plupart des cliniciens ne comprenaient pas l'expression « objection de conscience »; les sages-femmes étaient mieux informées surmiter l'abus du droit d'objection des cliniciens et à améliorer les soins de santé reproductive des femmes au Ghana.in English, French, RÉSUMÉ Contexte Dans une grande partie de l'Afrique subsaharienne et de l'Amérique latine, l'avortement est limité par la loi et ses prestataires sont en proie à la stigmatisation et au péril judiciaire. Comme l'indiquent les études, l'intervention du groupe Providers Share Workshop réduit cette stigmatisation aux États-Unis; elle n'a cependant pas été évaluée dans d'autres contextes. Méthodes En 2014–2015, l'atelier Providers Share Workshop a été adapté et piloté auprès de 59 membres du personnel de soins de l'avortement de trois pays d'Afrique subsaharienne et 93 soignants de sept pays d'Amérique latine. Les données d'enquête collectées avant, directement après et six mois après chaque atelier ont mesuré la stigmatisation, les attitudes et l'engagement de sécurité et de défense juridique sur la base des questions originales et d'échelles adaptées. Les changements de résultats au fil du temps, et entre les caractéristiques démographiques et les résultats, ont été mesurés par analyses univue (–1,5). Conclusions L'atelier Providers Share Workshop est une intervention prometteuse de soutien du personnel de soins de l'avortement en Afrique subsaharienne et en Amérique latine.in English, French, RÉSUMÉ Contexte L'infertilité perçue — le fait de croire, pour une personne, qu'elle ne peut pas concevoir ou causer une grossesse — peut conduire, entre autres préoccupations, à l'absence de contraception et à la grossesse non planifiée, sans toutefois avoir été largement étudiée dans les contextes à faible revenu. Méthodes Une mesure de l'infertilité perçue utilisée précédemment aux États-Unis a été incluse dans une enquête menée en 2015 auprès de jeunes adultes de Balaka (Malawi). La prévalence d'une éventuelle infertilité perçue (c'est-à-dire croire qu'il est légèrement ou fortement probable qu'on soit infertile, ou qu'on aurait des difficultés à concevoir ou à causer la grossesse d'une partenaire; IPP) a été estimée dans l‘échantillon analytique de l‘étude, composé de 1 064 femmes et de 527 hommes âgés de 21 à 29 ans. Les variables associées à l'IPP ont été identifiées par régression logistique multivariable. Les raisons d'IPP données par les répondants et leurs estimations de la probles connaissances sur les probabilités de grossesse et le retour à la fertilité après l'arrêt de la contraception peuvent réduire les préoccupations concernant l'infertilité perçue.Insect pollinators are becoming visible to societies. Many peer-reviewed papers evidence biophysical and ecological aspects of managed and non-managed insect pollinators. Evidence on stressors of declines yield peer-reviewed calls for action. Yet, insect pollinator declines are inherently a human issue, driven by a history of land-use trends, changes in technologies, and socio-cultural perceptions that unwittingly cause and perpetuate declines. Conservation requires integrating social and ecological understandings to reconfigure human behaviors across societies' sectors. We review recent literature on the social and cultural dimensions of insect pollinators. People now like bees. We discuss the social challenges and opportunities that accompany this newfound public enthusiasm. These include the generalization of honey bees as representative of bee diversity and pollinator conservation issues, the changing perceptions of pollinators, the paucity of policy research, and how any call to 'save the bees' must be a call to stabilize agriculture.0 Commentarii 0 Distribuiri 4 Views 0 previzualizare -
Knockdown of HAGLR downregulated expressions of TGFBR2, p-smad2, p-smad3, and RUNX2 in MC3T3-E1 cells, indicating the inhibited TGF-β pathway. CONCLUSIONS LncRNA HAGLR/miRNA-19a-3p/TGFBR2 regulatory loop accelerates the healing process of femoral neck fracture by inhibiting the TGF-β pathway.OBJECTIVE Fragile fracture patients need to be treated with long-term fixation and the recovery process is slow. Several studies have shown that the fracture healing process is related to gene expression. We aimed to investigate the role of long chain non-coding RNA TSIX (lncRNA TSIX) on fracture healing after tibial fracture (TF) and explore the molecular mechanism underlying its action. MATERIALS AND METHODS The male C57BL/6J **** were used to construct TF models and osteoblasts were used as in vitro model. The proliferation, apoptosis, and osteogenesis-related genes of Col1a1, Col-II, and Col-X were detected to evaluate the role of lncRNA TSIX in vivo and in vitro after TF. Haematoxylin-eosin (HE) staining was conducted to confirm the fracture healing conditions. https://www.selleckchem.com/products/azd9291.html RESULTS We found that LncRNA TSIX expression in plasma of TF **** significantly upregulated in a time-dependent manner. Overexpression of lncRNA TSIX could significantly inhibit proliferation but promote apoptosis and regulate the osteogenesis-related genes expression by binding and positively regulate sex-determining region Y box 6 (SOX6) expression, while knockdown of lncRNA TSIX showed the opposite effect in osteoblastic cells. Inhibition of lncRNA TSIX could improve fracture healing after TF. CONCLUSIONS Taken together, our study supported that knockdown of lncRNA TSIX could promote the tibia fracture healing by binding and inhibiting the SOX6 expression. We suggest that lncRNA TSIX/SOX may be the potential targets for the treatment of TF.Accumulating researches have proved that long noncoding RNAs (lncRNAs) regulate a variety of cellular processes during cancer progression. However, the detailed function of most lncRNAs in colorectal cancer (CRC) remains mostly unknown. This study was aimed at exploring the specific role of lncRNA EGOT in CRC. Data from this study revealed that EGOT expression was obviously upregulated in CRC tissues and cell lines, and high EGOT expression indicated poor overall survival of CRC patients. Besides, functional assays proved that EGOT knockdown inhibited cell proliferation and promoted cell apoptosis in CRC. Then, subsequent molecular mechanism assays uncovered that EGOT could bind with miR-33b-5p and negatively regulate miR-33b-5p expression. Additionally, CROT was a downstream target of miR-33b-5p. Further, rescued-function assays suggested that the suppressive influence of EGOT depletion on CRC progression was reversed by miR-33b-5p inhibition or CROT overexpression. In conclusion, lncRNA EGOT mediates the tumor-facilitating part in CRC via miR-33b-5p/CROT pathway. Copyright 2020 The Author(s).BACKGROUND AND OBJECTIVES General self-efficacy (GSE) encourages health-promoting behaviors in older adults. It is unsurprising then that older adults receiving health care services are reported to have a greater risk of low GSE than older adults who are not. Despite this, there is currently limited evidence investigating whether the effect differs based on the environment in which care is received. This review aims to determine whether the GSE of older adults is affected by the receipt of health care services and whether GSE varies based on the setting in which care is received. RESEARCH DESIGN AND METHODS In accordance with PRISMA guidelines (PROSPERO registration number CRD42018092191), a systematic search was undertaken across 7 databases. Standardized mean differences (SMD) and mean General Self-Efficacy Scale scores, with 95% confidence intervals (CI), were pooled for meta-analysis. RESULTS A total of 40 studies were identified, they consisted of 33 population cohorts that were included in the meta-analysis. Older adults receiving health care services were found to be at greater risk of having lower GSE than those who do not (SMD = -0.62; 95% CI -0.96 to -0.27, p less then .0001). Following identification of sources of heterogeneity, older adults receiving acute inpatient care were more likely to have lower GSE than those receiving care in other health care settings. DISCUSSION AND IMPLICATIONS Older adults receiving inpatient care have a greater risk of lower GSE, and consequently, poorer health-promoting behaviors. Further research is recommended that focuses on the GSE of older adults and health outcomes following discharge from inpatient care. © The Author(s) 2020. Published by Oxford University Press on behalf of The Gerontological Society of America.BACKGROUND Previous studies have found that children born with a non-syndromic orofacial cleft have lower-than-average educational attainment. Differences could be due to a genetic predisposition to low intelligence and academic performance, factors arising due to the cleft phenotype (such as social stigmatization, impaired speech/language development) or confounding by the prenatal environment. A clearer understanding of this mechanism will inform interventions to improve educational attainment in individuals born with a cleft, which could substantially improve their quality of life. We assessed evidence for the hypothesis that common variant genetic liability to non-syndromic cleft lip with or without cleft palate (nsCL/P) influences educational attainment. METHODS We performed a genome-wide association study (GWAS) meta-analysis of nsCL/P with 1692 nsCL/P cases and 4259 parental and unrelated controls. Using GWAS summary statistics, we performed Linkage Disequilibrium (LD)-score regression to estimate the genetic correlation between nsCL/P, educational attainment (GWAS n = 766 345) and intelligence (GWAS n = 257 828). We used two-sample Mendelian randomization to evaluate the causal effects of genetic liability to nsCL/P on educational attainment and intelligence. RESULTS There was limited evidence for shared genetic aetiology or causal relationships between nsCL/P and educational attainment [genetic correlation (rg) -0.05, 95% confidence interval (CI) -0.12 to 0.01, P 0.13; MR estimate (βMR) -0.002, 95% CI -0.009 to 0.006, P 0.679) or intelligence (rg -0.04, 95% CI -0.13 to 0.04, P 0.34; βMR -0.009, 95% CI -0.02 to 0.002, P 0.11). CONCLUSIONS Common variants are unlikely to predispose individuals born with nsCL/P to low educational attainment or intelligence. This is an important first step towards understanding the aetiology of low educational attainment in this group. © The Author(s) 2020. Published by Oxford University Press on behalf of the International Epidemiological Association.
Knockdown of HAGLR downregulated expressions of TGFBR2, p-smad2, p-smad3, and RUNX2 in MC3T3-E1 cells, indicating the inhibited TGF-β pathway. CONCLUSIONS LncRNA HAGLR/miRNA-19a-3p/TGFBR2 regulatory loop accelerates the healing process of femoral neck fracture by inhibiting the TGF-β pathway.OBJECTIVE Fragile fracture patients need to be treated with long-term fixation and the recovery process is slow. Several studies have shown that the fracture healing process is related to gene expression. We aimed to investigate the role of long chain non-coding RNA TSIX (lncRNA TSIX) on fracture healing after tibial fracture (TF) and explore the molecular mechanism underlying its action. MATERIALS AND METHODS The male C57BL/6J mice were used to construct TF models and osteoblasts were used as in vitro model. The proliferation, apoptosis, and osteogenesis-related genes of Col1a1, Col-II, and Col-X were detected to evaluate the role of lncRNA TSIX in vivo and in vitro after TF. Haematoxylin-eosin (HE) staining was conducted to confirm the fracture healing conditions. https://www.selleckchem.com/products/azd9291.html RESULTS We found that LncRNA TSIX expression in plasma of TF mice significantly upregulated in a time-dependent manner. Overexpression of lncRNA TSIX could significantly inhibit proliferation but promote apoptosis and regulate the osteogenesis-related genes expression by binding and positively regulate sex-determining region Y box 6 (SOX6) expression, while knockdown of lncRNA TSIX showed the opposite effect in osteoblastic cells. Inhibition of lncRNA TSIX could improve fracture healing after TF. CONCLUSIONS Taken together, our study supported that knockdown of lncRNA TSIX could promote the tibia fracture healing by binding and inhibiting the SOX6 expression. We suggest that lncRNA TSIX/SOX may be the potential targets for the treatment of TF.Accumulating researches have proved that long noncoding RNAs (lncRNAs) regulate a variety of cellular processes during cancer progression. However, the detailed function of most lncRNAs in colorectal cancer (CRC) remains mostly unknown. This study was aimed at exploring the specific role of lncRNA EGOT in CRC. Data from this study revealed that EGOT expression was obviously upregulated in CRC tissues and cell lines, and high EGOT expression indicated poor overall survival of CRC patients. Besides, functional assays proved that EGOT knockdown inhibited cell proliferation and promoted cell apoptosis in CRC. Then, subsequent molecular mechanism assays uncovered that EGOT could bind with miR-33b-5p and negatively regulate miR-33b-5p expression. Additionally, CROT was a downstream target of miR-33b-5p. Further, rescued-function assays suggested that the suppressive influence of EGOT depletion on CRC progression was reversed by miR-33b-5p inhibition or CROT overexpression. In conclusion, lncRNA EGOT mediates the tumor-facilitating part in CRC via miR-33b-5p/CROT pathway. Copyright 2020 The Author(s).BACKGROUND AND OBJECTIVES General self-efficacy (GSE) encourages health-promoting behaviors in older adults. It is unsurprising then that older adults receiving health care services are reported to have a greater risk of low GSE than older adults who are not. Despite this, there is currently limited evidence investigating whether the effect differs based on the environment in which care is received. This review aims to determine whether the GSE of older adults is affected by the receipt of health care services and whether GSE varies based on the setting in which care is received. RESEARCH DESIGN AND METHODS In accordance with PRISMA guidelines (PROSPERO registration number CRD42018092191), a systematic search was undertaken across 7 databases. Standardized mean differences (SMD) and mean General Self-Efficacy Scale scores, with 95% confidence intervals (CI), were pooled for meta-analysis. RESULTS A total of 40 studies were identified, they consisted of 33 population cohorts that were included in the meta-analysis. Older adults receiving health care services were found to be at greater risk of having lower GSE than those who do not (SMD = -0.62; 95% CI -0.96 to -0.27, p less then .0001). Following identification of sources of heterogeneity, older adults receiving acute inpatient care were more likely to have lower GSE than those receiving care in other health care settings. DISCUSSION AND IMPLICATIONS Older adults receiving inpatient care have a greater risk of lower GSE, and consequently, poorer health-promoting behaviors. Further research is recommended that focuses on the GSE of older adults and health outcomes following discharge from inpatient care. © The Author(s) 2020. Published by Oxford University Press on behalf of The Gerontological Society of America.BACKGROUND Previous studies have found that children born with a non-syndromic orofacial cleft have lower-than-average educational attainment. Differences could be due to a genetic predisposition to low intelligence and academic performance, factors arising due to the cleft phenotype (such as social stigmatization, impaired speech/language development) or confounding by the prenatal environment. A clearer understanding of this mechanism will inform interventions to improve educational attainment in individuals born with a cleft, which could substantially improve their quality of life. We assessed evidence for the hypothesis that common variant genetic liability to non-syndromic cleft lip with or without cleft palate (nsCL/P) influences educational attainment. METHODS We performed a genome-wide association study (GWAS) meta-analysis of nsCL/P with 1692 nsCL/P cases and 4259 parental and unrelated controls. Using GWAS summary statistics, we performed Linkage Disequilibrium (LD)-score regression to estimate the genetic correlation between nsCL/P, educational attainment (GWAS n = 766 345) and intelligence (GWAS n = 257 828). We used two-sample Mendelian randomization to evaluate the causal effects of genetic liability to nsCL/P on educational attainment and intelligence. RESULTS There was limited evidence for shared genetic aetiology or causal relationships between nsCL/P and educational attainment [genetic correlation (rg) -0.05, 95% confidence interval (CI) -0.12 to 0.01, P 0.13; MR estimate (βMR) -0.002, 95% CI -0.009 to 0.006, P 0.679) or intelligence (rg -0.04, 95% CI -0.13 to 0.04, P 0.34; βMR -0.009, 95% CI -0.02 to 0.002, P 0.11). CONCLUSIONS Common variants are unlikely to predispose individuals born with nsCL/P to low educational attainment or intelligence. This is an important first step towards understanding the aetiology of low educational attainment in this group. © The Author(s) 2020. Published by Oxford University Press on behalf of the International Epidemiological Association.0 Commentarii 0 Distribuiri 9 Views 0 previzualizare -
Following previous reports of very high epilepsy prevalence in the onchocerciasis-endemic villages in Maridi County, South Sudan, a study was conducted to investigate the association between the level of Onchocerca volvulus infection, epilepsy, and related outcomes. In December 2018, persons with epilepsy (PWE) were recruited from villages where an epilepsy prevalence of 4.4% (range 3.5-11.9%) was documented. We enrolled 318 participants from whom two skin snips were taken for microscopic detection of O. volvulus microfilariae (mf). Seizure history was obtained for all PWE and their degree of disability assessed using the modified Rankin scale. Almost all (84.9%) PWE had detectable mf in their skin snips. Onchocerciasis-infected PWE experienced nodding seizures more often than uninfected PWE (p=0.034). Moreover, persons with nodding seizures had more frequent seizures (p less then 0.001) and higher disability scores (p less then 0.001), and were more often cognitively impaired and younger at the time of their first epileptic seizure (nine years vs 12 years, p less then 0.001) compared to PWE without nodding seizures. Based on multivariate models, nodding seizures were associated with higher mf densities (aOR 1.022; 95% CI 1.005-1.041). Epilepsy onset at a younger age was associated with a worse outcome. Higher frequency of seizures, longer duration of epilepsy and younger age were associated with increased disability. Regular antiepileptic drug use was associated with better cognitive and disability outcomes. PWE with nodding seizures have a more severe form of onchocerciasis-associated epilepsy, with earlier seizure onset and higher levels of O. volvulus infection. Younger PWE were prone to worse epilepsy outcomes, which would be prevented with regular antiepileptic treatment.The discovery of eosinophilia above 1.5 G/L should not be considered innocuous, requiring monitoring for etiology and possible secondary organ damage. Among these, cardiac localization is the most worrying, sometimes indolent, to be systematically sought by ultrasound and magnetic resonance. The potential etiologies are very numerous, mostly reactive and corticosensitive, **** more rarely clonal in relation to a malignant hemopathy usually chronic and myeloid, sometimes sensitive to tyrosine kinase inhibitors.The prevalence of crystalline pathologies including urolithiasis, gallstones, vascular calcifications and crystalline arthritis, is very high in the general population beyond 60 years old. Characterization of microcrystals in tissue at the micrometer and at the nanometer scale through physico-chemical techniques constitutes a new opportunity for the physician to decipher the early stage of the pathogenesis of these biological entities. In this review, such description indicates a wide variety of the chemical process associated to the nucleation process directly from supersaturated solution or from organic support such as DNA or elastin. We will also discuss the case of vesicles which play a major role in the case of ectopic calcification situated in kidney tissue, namely the Randall's plaque. All this research focused on the very first steps of the genesis of pathological calcifications constitute a major step to develop specific therapy able to avoid the formation of these abnormal deposits in tissues. As already underlined, crystals may be the consequence of various pathologies, but they are also involved in the dysfunction of the tissues.Despite representing the leading cause of epilepsy-related mortality, the pathophysiology of sudden unexpected death in epilepsy (SUDEP) remains elusive. In this context, the identification of clinical markers of SUDEP assumes a great importance and has been the target of many studies aimed at stratifying patients' individual risk. https://www.selleckchem.com/products/vb124.html Among the potentially most hazardous post-ictal phenomena observed following convulsive seizures in monitored SUDEP cases, postictal generalized EEG suppression and postictal immobility have attracted attention as potential SUDEP risk factors. In this manuscript, we review the current knowledge on postictal generalized EEG suppression and postictal immobility, aiming to identify their pathophysiological mechanisms, reported frequencies and associated clinical factors, and critically evaluate the evidence on their potential relevance as SUDEP risk markers.Aims In the ILUMIEN III trial, among 450 randomised patients with non-complex lesions undergoing percutaneous coronary intervention (PCI), optical coherence tomography (OCT) guidance led to greater stent expansion than angiography guidance, similar minimal stent area compared to both intravascular ultrasound (IVUS) guidance and angiography guidance, and lower rates of uncorrected dissection and malapposition than both IVUS guidance and angiography guidance. Whether these differences impact clinical outcomes is unknown. Methods and results OCT-guided PCI, using an external elastic lamina-based protocol, was compared to operator-directed IVUS-guided or angiography-guided PCI. Target lesion failure (TLF) and major adverse cardiovascular events (****) at 12 months were adjudicated by a blinded clinical events committee. There were no significant differences in the rates of TLF (2.0% OCT, 3.7% IVUS, 1.4% angiography), **** (9.8% OCT, 9.1% IVUS, 7.9% angiography), or any of the individual components of these outcomes between groups. No independent predictors of 12-month stent-related clinical events were identified from final OCT. Conclusions In this underpowered study, OCT-guided PCI of non-complex lesions did not show a statistical difference in clinical outcomes at 12-months compared with IVUS or angiography guidance. An appropriately powered trial, including only complex patients and lesions, is underway to substantiate the potential clinical benefit for OCT-guided PCI.Eosinophils were discovered more than 140 years ago. This polymorphonuclear leukocyte has a very active metabolism, containing numerous intracellular secretory granules that allow it exerts multiple functions in both health and disease status. Classically, eosinophils have been considered as important immune cells in the pathogenesis of inflammatory processes such as parasitic helminth infections and allergic or pulmonary diseases like asthma, being always associated to a type 2 immune response; furthermore, in the last years, it has been linked to immune response conferring host protection against fungi, bacteria, and viruses, recognizing them through several molecules such as toll-like receptors (TLRs) or retinoic acid-inducible gene 1 (RIG-1)-like receptor (RLR). The immune protection is exerted through multiple mechanisms and properties of these cells. They contain numerous cytoplasmatic granules that release cationic proteins, cytokines, chemokines and other molecules that contribute to their functions. In addition to their competence as effectors cells, its capabilities like antigen-presenting cell allow them to act in multiple situations promoting diverse aspects of the immune response.
Following previous reports of very high epilepsy prevalence in the onchocerciasis-endemic villages in Maridi County, South Sudan, a study was conducted to investigate the association between the level of Onchocerca volvulus infection, epilepsy, and related outcomes. In December 2018, persons with epilepsy (PWE) were recruited from villages where an epilepsy prevalence of 4.4% (range 3.5-11.9%) was documented. We enrolled 318 participants from whom two skin snips were taken for microscopic detection of O. volvulus microfilariae (mf). Seizure history was obtained for all PWE and their degree of disability assessed using the modified Rankin scale. Almost all (84.9%) PWE had detectable mf in their skin snips. Onchocerciasis-infected PWE experienced nodding seizures more often than uninfected PWE (p=0.034). Moreover, persons with nodding seizures had more frequent seizures (p less then 0.001) and higher disability scores (p less then 0.001), and were more often cognitively impaired and younger at the time of their first epileptic seizure (nine years vs 12 years, p less then 0.001) compared to PWE without nodding seizures. Based on multivariate models, nodding seizures were associated with higher mf densities (aOR 1.022; 95% CI 1.005-1.041). Epilepsy onset at a younger age was associated with a worse outcome. Higher frequency of seizures, longer duration of epilepsy and younger age were associated with increased disability. Regular antiepileptic drug use was associated with better cognitive and disability outcomes. PWE with nodding seizures have a more severe form of onchocerciasis-associated epilepsy, with earlier seizure onset and higher levels of O. volvulus infection. Younger PWE were prone to worse epilepsy outcomes, which would be prevented with regular antiepileptic treatment.The discovery of eosinophilia above 1.5 G/L should not be considered innocuous, requiring monitoring for etiology and possible secondary organ damage. Among these, cardiac localization is the most worrying, sometimes indolent, to be systematically sought by ultrasound and magnetic resonance. The potential etiologies are very numerous, mostly reactive and corticosensitive, much more rarely clonal in relation to a malignant hemopathy usually chronic and myeloid, sometimes sensitive to tyrosine kinase inhibitors.The prevalence of crystalline pathologies including urolithiasis, gallstones, vascular calcifications and crystalline arthritis, is very high in the general population beyond 60 years old. Characterization of microcrystals in tissue at the micrometer and at the nanometer scale through physico-chemical techniques constitutes a new opportunity for the physician to decipher the early stage of the pathogenesis of these biological entities. In this review, such description indicates a wide variety of the chemical process associated to the nucleation process directly from supersaturated solution or from organic support such as DNA or elastin. We will also discuss the case of vesicles which play a major role in the case of ectopic calcification situated in kidney tissue, namely the Randall's plaque. All this research focused on the very first steps of the genesis of pathological calcifications constitute a major step to develop specific therapy able to avoid the formation of these abnormal deposits in tissues. As already underlined, crystals may be the consequence of various pathologies, but they are also involved in the dysfunction of the tissues.Despite representing the leading cause of epilepsy-related mortality, the pathophysiology of sudden unexpected death in epilepsy (SUDEP) remains elusive. In this context, the identification of clinical markers of SUDEP assumes a great importance and has been the target of many studies aimed at stratifying patients' individual risk. https://www.selleckchem.com/products/vb124.html Among the potentially most hazardous post-ictal phenomena observed following convulsive seizures in monitored SUDEP cases, postictal generalized EEG suppression and postictal immobility have attracted attention as potential SUDEP risk factors. In this manuscript, we review the current knowledge on postictal generalized EEG suppression and postictal immobility, aiming to identify their pathophysiological mechanisms, reported frequencies and associated clinical factors, and critically evaluate the evidence on their potential relevance as SUDEP risk markers.Aims In the ILUMIEN III trial, among 450 randomised patients with non-complex lesions undergoing percutaneous coronary intervention (PCI), optical coherence tomography (OCT) guidance led to greater stent expansion than angiography guidance, similar minimal stent area compared to both intravascular ultrasound (IVUS) guidance and angiography guidance, and lower rates of uncorrected dissection and malapposition than both IVUS guidance and angiography guidance. Whether these differences impact clinical outcomes is unknown. Methods and results OCT-guided PCI, using an external elastic lamina-based protocol, was compared to operator-directed IVUS-guided or angiography-guided PCI. Target lesion failure (TLF) and major adverse cardiovascular events (MACE) at 12 months were adjudicated by a blinded clinical events committee. There were no significant differences in the rates of TLF (2.0% OCT, 3.7% IVUS, 1.4% angiography), MACE (9.8% OCT, 9.1% IVUS, 7.9% angiography), or any of the individual components of these outcomes between groups. No independent predictors of 12-month stent-related clinical events were identified from final OCT. Conclusions In this underpowered study, OCT-guided PCI of non-complex lesions did not show a statistical difference in clinical outcomes at 12-months compared with IVUS or angiography guidance. An appropriately powered trial, including only complex patients and lesions, is underway to substantiate the potential clinical benefit for OCT-guided PCI.Eosinophils were discovered more than 140 years ago. This polymorphonuclear leukocyte has a very active metabolism, containing numerous intracellular secretory granules that allow it exerts multiple functions in both health and disease status. Classically, eosinophils have been considered as important immune cells in the pathogenesis of inflammatory processes such as parasitic helminth infections and allergic or pulmonary diseases like asthma, being always associated to a type 2 immune response; furthermore, in the last years, it has been linked to immune response conferring host protection against fungi, bacteria, and viruses, recognizing them through several molecules such as toll-like receptors (TLRs) or retinoic acid-inducible gene 1 (RIG-1)-like receptor (RLR). The immune protection is exerted through multiple mechanisms and properties of these cells. They contain numerous cytoplasmatic granules that release cationic proteins, cytokines, chemokines and other molecules that contribute to their functions. In addition to their competence as effectors cells, its capabilities like antigen-presenting cell allow them to act in multiple situations promoting diverse aspects of the immune response.0 Commentarii 0 Distribuiri 7 Views 0 previzualizare -
The study of G-quadruplexes (G4s) in a cellular context has demonstrated links between these nucleic acid secondary structures, gene expression, and DNA replication. Ligands that bind to the G4 structure therefore present an excellent opportunity for influencing gene expression through the targeting of a nucleic acid structure rather than sequence. https://www.selleckchem.com/GSK-3.html Here, we explore cyclic peptides as an alternative class of G4 ligands. Specifically, we describe the development of de novo G4-binding bicyclic peptides selected by phage display. Selected bicyclic peptides display submicromolar affinity to G4 structures and high selectivity over double helix DNA. Molecular simulations of the bicyclic peptide-G4 complexes corroborate the experimental binding strengths and reveal molecular insights into G4 recognition by bicyclic peptides via the precise positioning of amino acid side chains, a binding mechanism reminiscent of endogenous G4-binding proteins. Overall, our results demonstrate that selection of (bi)cyclic peptides unlocks a valuable chemical space for targeting nucleic acid structures.The nuclear peroxisome proliferator-activated receptor γ has well-validated therapeutic potential in metabolic, inflammatory, and neurodegenerative pathologies, but its activation is also associated with marked adverse effects and novel modes of PPARγ modulation are required. Here, we report the discovery and profiling of a new PPARγ modulator chemotype endowed with remarkable potency and a distinct binding mode in the orthosteric PPARγ ligand-binding site. Its R-enantiomer evolved as a eutomer regarding PPARγ activation with a high eudysmic ratio. The new PPARγ modulator revealed outstanding selectivity over the PPARα and PPARδ subtypes and did not promote adipogenesis in primary human fibroblasts, discriminating it from established agonists.While proteasome inhibitors such as bortezomib showed satisfactory clinical benefits in the initial treatment of multiple myeloma (MM), drug resistance and relapse are unavoidable. Recent studies suggested inhibition of HDACs restored sensitivity of bortezomib resistant MM. Hence, we designed dual inhibitors target both HDACs and proteasome to address the resistance of bortezomib. The most potent inhibitors, ZY-2 and ZY-13 showed excellent inhibition against proteasome and good selectivity against HDACs. In particular, ZY-2 not only exhibited good antiproliferative activities on MM cell lines RPMI-8226, U266 and KM3 (IC50 values of 6.66 nM, 4.31 nM and 10.1 nM, respectively) but also showed more potent antiproliferative activities against the bortezomib resistant MM cell line KM3/BTZ compared with bortezomib (IC50 values of 8.98 nM vs. 226 nM, P less then 0.01) and even better than the combination of HDAC inhibitor MS-275 and bortezomib (11) (IC50 values of 8.98 nM vs. 98.0 nM, P less then 0.01).Underlying the risk management of pesticides to protect human health and to facilitate trade among nations are sound scientific data on the levels of compliance with standards set by governments and internationally from monitoring of the levels of pesticides in foods. Although glyphosate is among the universally used pesticides in the world, monitoring has been hampered by the analytical difficulties in dealing with this highly polar compound. Starting in 2015, using liquid chromatography/tandem mass spectrometry (LC-MS/MS) that permits accurate and reproducible determination of glyphosate, the prevalence, concentrations, and compliance rates were determined. In this work, the glyphosate residues contents of 7955 samples of fresh fruits and vegetables, milled grain products, pulse products, and finished foods collected from April 2015 to March 2017 in the Canadian retail market are reported. A total of 3366 samples (42.3%) contained detectable glyphosate residues. The compliance rate with Canadian regulations was 99.4%. There were 46 noncompliant samples. Health Canada determined that there was no long-term health risk to Canadian consumers from exposure to the levels of glyphosate found in the samples of a variety of foods surveyed. The high level of compliance (99.4% of samples with the Canadian regulatory limits) and the lack of a health risk for noncompliant samples indicate that, with respect to glyphosates, the food available for **** in Canada is safe.Development of new photosensitizers (PSs) with high photodynamic efficacy and minimal side effects is of great interest in photodynamic therapy (PDT). In this work, we reported several pyridine-embedded phenothiazinium (pyridophenothiazinium) dyes, which could be conveniently synthesized in a few short steps and acted as highly efficient and potent PSs to selectively localize to lysosomes and photosensitively kill cancer cells. Among them, compound 5, which possessed the ability of promoting intracellular reactive oxygen species (ROS) upon light irradiation by almost 40-fold higher than that of methylene blue (MB, a general phenothiazinium-based PS), exhibited a remarkable phototherapeutic index (PI = 53.8) against HT29 cancer cells, leading to eradication of large solid tumors (∼300 mm3) in a xenograft mouse model without apparent side effects. These results suggest that the pyridophenothiazinium dyes developed herein, especially compound 5, may serve as promising lysosome-targeted PSs for efficient photodynamic antitumor therapy.In the current study, electron paramagnetic resonance (EPR) spectroscopy was employed to measure environmentally persistent free radicals (EPFRs) in the total particulate matter (TPM) of mainstream and sidestream TPM of conventional cigarettes and the TPM of e-cigarettes. Comparable concentrations of EPFRs were detected in both sidestream (8.05 ± 1.32) × 104 pmol/g and mainstream TPM (7.41 ± 0.85) × 104 pmol/g of conventional cigarettes. TPM exposure to air resulted in long-lived oxygen centered, secondary radicals with EPR g values of 2.0041 for mainstream and 2.0044 for sidestream. Surprisingly, despite no combustion process, the TPM from e-cigarettes (menthol flavor of NJOY and V2 brands) also contain EPFRs with g values of 2.0031-2.0033, characteristic of carbon centered radicals, while the radical signal in the vanilla flavor of V2 brand was remarkably similar to semiquinones in cigarette smoke with a higher g value (2.0063). The radical concentration in e-cigarettes was **** lower as compared to tobacco TPM.
The study of G-quadruplexes (G4s) in a cellular context has demonstrated links between these nucleic acid secondary structures, gene expression, and DNA replication. Ligands that bind to the G4 structure therefore present an excellent opportunity for influencing gene expression through the targeting of a nucleic acid structure rather than sequence. https://www.selleckchem.com/GSK-3.html Here, we explore cyclic peptides as an alternative class of G4 ligands. Specifically, we describe the development of de novo G4-binding bicyclic peptides selected by phage display. Selected bicyclic peptides display submicromolar affinity to G4 structures and high selectivity over double helix DNA. Molecular simulations of the bicyclic peptide-G4 complexes corroborate the experimental binding strengths and reveal molecular insights into G4 recognition by bicyclic peptides via the precise positioning of amino acid side chains, a binding mechanism reminiscent of endogenous G4-binding proteins. Overall, our results demonstrate that selection of (bi)cyclic peptides unlocks a valuable chemical space for targeting nucleic acid structures.The nuclear peroxisome proliferator-activated receptor γ has well-validated therapeutic potential in metabolic, inflammatory, and neurodegenerative pathologies, but its activation is also associated with marked adverse effects and novel modes of PPARγ modulation are required. Here, we report the discovery and profiling of a new PPARγ modulator chemotype endowed with remarkable potency and a distinct binding mode in the orthosteric PPARγ ligand-binding site. Its R-enantiomer evolved as a eutomer regarding PPARγ activation with a high eudysmic ratio. The new PPARγ modulator revealed outstanding selectivity over the PPARα and PPARδ subtypes and did not promote adipogenesis in primary human fibroblasts, discriminating it from established agonists.While proteasome inhibitors such as bortezomib showed satisfactory clinical benefits in the initial treatment of multiple myeloma (MM), drug resistance and relapse are unavoidable. Recent studies suggested inhibition of HDACs restored sensitivity of bortezomib resistant MM. Hence, we designed dual inhibitors target both HDACs and proteasome to address the resistance of bortezomib. The most potent inhibitors, ZY-2 and ZY-13 showed excellent inhibition against proteasome and good selectivity against HDACs. In particular, ZY-2 not only exhibited good antiproliferative activities on MM cell lines RPMI-8226, U266 and KM3 (IC50 values of 6.66 nM, 4.31 nM and 10.1 nM, respectively) but also showed more potent antiproliferative activities against the bortezomib resistant MM cell line KM3/BTZ compared with bortezomib (IC50 values of 8.98 nM vs. 226 nM, P less then 0.01) and even better than the combination of HDAC inhibitor MS-275 and bortezomib (11) (IC50 values of 8.98 nM vs. 98.0 nM, P less then 0.01).Underlying the risk management of pesticides to protect human health and to facilitate trade among nations are sound scientific data on the levels of compliance with standards set by governments and internationally from monitoring of the levels of pesticides in foods. Although glyphosate is among the universally used pesticides in the world, monitoring has been hampered by the analytical difficulties in dealing with this highly polar compound. Starting in 2015, using liquid chromatography/tandem mass spectrometry (LC-MS/MS) that permits accurate and reproducible determination of glyphosate, the prevalence, concentrations, and compliance rates were determined. In this work, the glyphosate residues contents of 7955 samples of fresh fruits and vegetables, milled grain products, pulse products, and finished foods collected from April 2015 to March 2017 in the Canadian retail market are reported. A total of 3366 samples (42.3%) contained detectable glyphosate residues. The compliance rate with Canadian regulations was 99.4%. There were 46 noncompliant samples. Health Canada determined that there was no long-term health risk to Canadian consumers from exposure to the levels of glyphosate found in the samples of a variety of foods surveyed. The high level of compliance (99.4% of samples with the Canadian regulatory limits) and the lack of a health risk for noncompliant samples indicate that, with respect to glyphosates, the food available for sale in Canada is safe.Development of new photosensitizers (PSs) with high photodynamic efficacy and minimal side effects is of great interest in photodynamic therapy (PDT). In this work, we reported several pyridine-embedded phenothiazinium (pyridophenothiazinium) dyes, which could be conveniently synthesized in a few short steps and acted as highly efficient and potent PSs to selectively localize to lysosomes and photosensitively kill cancer cells. Among them, compound 5, which possessed the ability of promoting intracellular reactive oxygen species (ROS) upon light irradiation by almost 40-fold higher than that of methylene blue (MB, a general phenothiazinium-based PS), exhibited a remarkable phototherapeutic index (PI = 53.8) against HT29 cancer cells, leading to eradication of large solid tumors (∼300 mm3) in a xenograft mouse model without apparent side effects. These results suggest that the pyridophenothiazinium dyes developed herein, especially compound 5, may serve as promising lysosome-targeted PSs for efficient photodynamic antitumor therapy.In the current study, electron paramagnetic resonance (EPR) spectroscopy was employed to measure environmentally persistent free radicals (EPFRs) in the total particulate matter (TPM) of mainstream and sidestream TPM of conventional cigarettes and the TPM of e-cigarettes. Comparable concentrations of EPFRs were detected in both sidestream (8.05 ± 1.32) × 104 pmol/g and mainstream TPM (7.41 ± 0.85) × 104 pmol/g of conventional cigarettes. TPM exposure to air resulted in long-lived oxygen centered, secondary radicals with EPR g values of 2.0041 for mainstream and 2.0044 for sidestream. Surprisingly, despite no combustion process, the TPM from e-cigarettes (menthol flavor of NJOY and V2 brands) also contain EPFRs with g values of 2.0031-2.0033, characteristic of carbon centered radicals, while the radical signal in the vanilla flavor of V2 brand was remarkably similar to semiquinones in cigarette smoke with a higher g value (2.0063). The radical concentration in e-cigarettes was much lower as compared to tobacco TPM.0 Commentarii 0 Distribuiri 4 Views 0 previzualizare -
The mechanistic target of rapamycin (also known as mammalian target of rapamycin) (mTOR)-dependent signaling pathway plays an important role in protein synthesis, cell growth, and proliferation, and has been linked to the development of the central nervous system. Recent studies suggest that mTOR signaling pathway dysfunction could be involved in the etiopathogenesis of schizophrenia. The main goal of this study was to evaluate the status of mTOR signaling pathway in postmortem prefrontal cortex (PFC) samples of subjects with schizophrenia. For this purpose, we quantified the protein expression and phosphorylation status of the mTOR downstream effector ribosomal protein S6 as well as other pathway interactors such as Akt and GSK3β. Furthermore, we quantified the status of these proteins in the brain cortex of rats chronically treated with the antipsychotics haloperidol, clozapine, or risperidone. We found a striking decrease in the expression of total S6 and in its active phosphorylated form phospho-S6 (Ser235/236) in the brain of subjects with schizophrenia compared to matched controls. The chronic treatment with the antipsychotics haloperidol and clozapine affected both the expression of GSK3β and the activation of Akt [phospho-Akt (Ser473)] in rat brain cortex, while no changes were observed in S6 and phospho-S6 (Ser235/236) protein expression with any antipsychotic treatment. These findings provide further evidence for the involvement of the mTOR-dependent signaling pathway in schizophrenia and suggest that a hypofunctional S6 may have a role in the etiopathogenesis of this disorder. Copyright © 2020 Ibarra-Lecue, Diez-Alarcia, Morentin, Meana, Callado and Urigüen.Platinum-based anticancer drugs, including cisplatin, carboplatin, oxaliplatin, nedaplatin, and lobaplatin, are heavily applied in chemotherapy regimens. However, the intrinsic or acquired resistance severely limit the clinical application of platinum-based treatment. The underlying mechanisms are incredibly complicated. Multiple transporters participate in the active transport of platinum-based antitumor agents, and the altered expression level, localization, or activity may severely decrease the cellular platinum accumulation. https://www.selleckchem.com/products/irpagratinib.html Detoxification components, which are commonly increasing in resistant tumor cells, can efficiently bind to platinum agents and prevent the formation of platinum-DNA adducts, but the adducts production is the determinant step for the cytotoxicity of platinum-based antitumor agents. Even if adequate adducts have formed, tumor cells still manage to survive through increased DNA repair processes or elevated apoptosis threshold. In addition, autophagy has a profound influence on platinum resistance. This review summarizes the critical participators of platinum resistance mechanisms mentioned above and highlights the most potential therapeutic targets or predicted markers. With a deeper understanding of the underlying resistance mechanisms, new solutions would be produced to extend the clinical application of platinum-based antitumor agents largely. Copyright © 2020 Zhou, Kang, Chen, Wang, Liu, Zeng and Yu.Objective In this study, we aim to investigate the effect of different doses of dexmedetomidine as an adjuvant to hyperbaric ropivacaine in spinal anesthesia for cesarean section. Methods Seventy-five parturients with American Society of Anesthesiologists (ASA) I or II were anesthetized with intrathecal ropivacaine (12.5 mg) alone (R group) or in combination with dexmedetomidine 3 μg (RD3 group) and 5 μg (RD5 group) to undergo a cesarean section. The anesthetic parameters, postoperative analgesia, stress responses and neonates outcomes were monitored. Results The onset time of sensory block to T10, T4, and peak level in the RD3 group and RD5 group were significantly shorter than those in the R group (p less then 0.05). The time of the level of sensory block to descend two segments and to T10 in the RD3 group(57.28 ± 16.65 min, 3.87 ± 1.60 h) and RD5 group (71.92 ± 10.10 min, 3.99 ± 1.06 h) were longer than that in the R group (40.64 ± 12.06 min, 1.98 ± 1.01 h) (p less then 0.05). The median time of motor thecal dexmedetomidine as an adjuvant to ropivacaine improved intraoperative somato-visceral sensory block characteristics and postoperative analgesia, alleviated shivering in parturients, and did not prolong the time of motor block or produce any side effects, which makes this dose appropriate for cesarean delivery. Cinical Trial Registration ChiCTR, identifier ChiCTR1800014454. Registered 15 January 2018, http//www.chictr.org.cn/edit.aspx?pid=24613&htm=4. Copyright © 2020 Bi, Wu, Zhang and Zhang.Objectives The population pharmacokinetic (popPK) characteristics of total mycophenolic acid (tMPA) have been investigated in various ethnic populations. However, investigations of popPK of unbound MPA (uMPA) are few. Thus, a popPK analysis was performed to (1) characterize the PK of uMPA and tMPA and its 7-O-mycophenolic acid glucuronide (MPAG) metabolite in kidney transplant patients cotreated with cyclosporine (CsA), and (2) identify the clinically significant covariates that explain variability in the dose-exposure relationship. Methods A total of 740 uMPA, 741 tMPA, and 734 total MPAG (tMPAG) concentration-time data from 58 Chinese kidney transplant patients receiving MPA in combination with CsA were analyzed using NONMEM® software with the stochastic approximation expectation maximization (SAEM) followed by the important sampling (IMP) method. The influence of covariates was tested using a stepwise procedure. Results The PK of uMPA and unbound MPAG (uMPAG) were characterized by a two- and one-compartmen Conclusions The established model adequately described the popPK characteristics of the uMPA, tMPA, and MPAG. The estimated CLuMPA/F and unbound fraction of MPA (FUMPA) in Chinese kidney transplant recipients cotreated with CsA were comparable to those published previously in Caucasians. We recommend monitoring uMPA instead of tMPA to optimize mycophenolate mofetil (MMF) dosing for patients with lower ALB levels. Copyright © 2020 Sheng, Zhao, Niu, Qiu, Zhang and Jiao.
The mechanistic target of rapamycin (also known as mammalian target of rapamycin) (mTOR)-dependent signaling pathway plays an important role in protein synthesis, cell growth, and proliferation, and has been linked to the development of the central nervous system. Recent studies suggest that mTOR signaling pathway dysfunction could be involved in the etiopathogenesis of schizophrenia. The main goal of this study was to evaluate the status of mTOR signaling pathway in postmortem prefrontal cortex (PFC) samples of subjects with schizophrenia. For this purpose, we quantified the protein expression and phosphorylation status of the mTOR downstream effector ribosomal protein S6 as well as other pathway interactors such as Akt and GSK3β. Furthermore, we quantified the status of these proteins in the brain cortex of rats chronically treated with the antipsychotics haloperidol, clozapine, or risperidone. We found a striking decrease in the expression of total S6 and in its active phosphorylated form phospho-S6 (Ser235/236) in the brain of subjects with schizophrenia compared to matched controls. The chronic treatment with the antipsychotics haloperidol and clozapine affected both the expression of GSK3β and the activation of Akt [phospho-Akt (Ser473)] in rat brain cortex, while no changes were observed in S6 and phospho-S6 (Ser235/236) protein expression with any antipsychotic treatment. These findings provide further evidence for the involvement of the mTOR-dependent signaling pathway in schizophrenia and suggest that a hypofunctional S6 may have a role in the etiopathogenesis of this disorder. Copyright © 2020 Ibarra-Lecue, Diez-Alarcia, Morentin, Meana, Callado and Urigüen.Platinum-based anticancer drugs, including cisplatin, carboplatin, oxaliplatin, nedaplatin, and lobaplatin, are heavily applied in chemotherapy regimens. However, the intrinsic or acquired resistance severely limit the clinical application of platinum-based treatment. The underlying mechanisms are incredibly complicated. Multiple transporters participate in the active transport of platinum-based antitumor agents, and the altered expression level, localization, or activity may severely decrease the cellular platinum accumulation. https://www.selleckchem.com/products/irpagratinib.html Detoxification components, which are commonly increasing in resistant tumor cells, can efficiently bind to platinum agents and prevent the formation of platinum-DNA adducts, but the adducts production is the determinant step for the cytotoxicity of platinum-based antitumor agents. Even if adequate adducts have formed, tumor cells still manage to survive through increased DNA repair processes or elevated apoptosis threshold. In addition, autophagy has a profound influence on platinum resistance. This review summarizes the critical participators of platinum resistance mechanisms mentioned above and highlights the most potential therapeutic targets or predicted markers. With a deeper understanding of the underlying resistance mechanisms, new solutions would be produced to extend the clinical application of platinum-based antitumor agents largely. Copyright © 2020 Zhou, Kang, Chen, Wang, Liu, Zeng and Yu.Objective In this study, we aim to investigate the effect of different doses of dexmedetomidine as an adjuvant to hyperbaric ropivacaine in spinal anesthesia for cesarean section. Methods Seventy-five parturients with American Society of Anesthesiologists (ASA) I or II were anesthetized with intrathecal ropivacaine (12.5 mg) alone (R group) or in combination with dexmedetomidine 3 μg (RD3 group) and 5 μg (RD5 group) to undergo a cesarean section. The anesthetic parameters, postoperative analgesia, stress responses and neonates outcomes were monitored. Results The onset time of sensory block to T10, T4, and peak level in the RD3 group and RD5 group were significantly shorter than those in the R group (p less then 0.05). The time of the level of sensory block to descend two segments and to T10 in the RD3 group(57.28 ± 16.65 min, 3.87 ± 1.60 h) and RD5 group (71.92 ± 10.10 min, 3.99 ± 1.06 h) were longer than that in the R group (40.64 ± 12.06 min, 1.98 ± 1.01 h) (p less then 0.05). The median time of motor thecal dexmedetomidine as an adjuvant to ropivacaine improved intraoperative somato-visceral sensory block characteristics and postoperative analgesia, alleviated shivering in parturients, and did not prolong the time of motor block or produce any side effects, which makes this dose appropriate for cesarean delivery. Cinical Trial Registration ChiCTR, identifier ChiCTR1800014454. Registered 15 January 2018, http//www.chictr.org.cn/edit.aspx?pid=24613&htm=4. Copyright © 2020 Bi, Wu, Zhang and Zhang.Objectives The population pharmacokinetic (popPK) characteristics of total mycophenolic acid (tMPA) have been investigated in various ethnic populations. However, investigations of popPK of unbound MPA (uMPA) are few. Thus, a popPK analysis was performed to (1) characterize the PK of uMPA and tMPA and its 7-O-mycophenolic acid glucuronide (MPAG) metabolite in kidney transplant patients cotreated with cyclosporine (CsA), and (2) identify the clinically significant covariates that explain variability in the dose-exposure relationship. Methods A total of 740 uMPA, 741 tMPA, and 734 total MPAG (tMPAG) concentration-time data from 58 Chinese kidney transplant patients receiving MPA in combination with CsA were analyzed using NONMEM® software with the stochastic approximation expectation maximization (SAEM) followed by the important sampling (IMP) method. The influence of covariates was tested using a stepwise procedure. Results The PK of uMPA and unbound MPAG (uMPAG) were characterized by a two- and one-compartmen Conclusions The established model adequately described the popPK characteristics of the uMPA, tMPA, and MPAG. The estimated CLuMPA/F and unbound fraction of MPA (FUMPA) in Chinese kidney transplant recipients cotreated with CsA were comparable to those published previously in Caucasians. We recommend monitoring uMPA instead of tMPA to optimize mycophenolate mofetil (MMF) dosing for patients with lower ALB levels. Copyright © 2020 Sheng, Zhao, Niu, Qiu, Zhang and Jiao.0 Commentarii 0 Distribuiri 20 Views 0 previzualizare -
cted by copyright. All rights reserved.The stability of lavender, lemon balm, mint, sage, and thyme teas was investigated using in-vitro simulation of the digestive system. Kinetics of changes in the total polyphenolic content (TPC) and the antioxidant activity during the in-vitro trials were also evaluated. Results showed that TPC of mint teas decreases the fastest. Mathematical models for prediction of the TPC and the antioxidant activity of prepared teas based on UV-VIS and NIR spectra collected before, during, and after simulation showed that the best prediction was obtained for the wavelength ranges from 410 to 900 nm, 904 to 928 nm, and 1,399 to 1699 nm. It was concluded that the NIR can be used for calibration, validation, and classification of teas prepared from Lamiaceae plants. PRACTICAL APPLICATIONS The bioactives' in-vitro digestion process can successfully be characterized by chemical, spectroscopic, and mathematical analysis. Application of NIR spectroscopy, in combination with multivariate analysis, leads to a reduction of time, costs, and chemical consumption and gives reliable results that pharmaceutical, food, and chemical industries can benefit from.Chronic infantile neurological, cutaneous and articular (CINCA) syndrome is a rare autoinflammatory disease caused by monogenic defects in the NLRP3 gene. Pro-inflammatory cytokines such as interleukin (IL)-1β play a crucial role in the pathogenesis, and IL-1 receptor antagonists have been regarded as the mainstay therapy. Endogenous tumor necrosis factor (TNF)-α was found recently to be involved in the onset of the disease. Here, we report two Chinese children with CINCA syndrome who had elevated serum levels of TNF-α, with one carrying a novel mutation of c.1330T/G (p.444Phe/Val) in exon 3 of the NLRP3 gene. Anti-TNF-α (etanercept) therapy successfully alleviated both clinical symptoms and systemic inflammation after 6 months. These results suggest the complexity of the mechanisms of the disease and that TNF-α blockade will broaden the therapeutic approach for a subset of patients.A 2-day-old Japanese male infant was referred to our outpatient clinic for multiple cutaneous hemangiomas present since birth. Physical examination revealed 14 small, well-circumscribed red papules, scattered over the head, face, dorsum of the right hand, trunk, lower extremities, buttocks and penis. Ultrasound examination revealed no evidence of visceral involvement. Histological examination of a cutaneous lesion was consistent with infantile hemangioma, resulting in the final diagnosis of benign neonatal hemangiomatosis (BNH). The hemangiomas enlarged by 1 month of age and began to resolve at 2 months of age. Within the next month, the lesions had almost completely disappeared. BNH is a rare, non-heritable, self-limited, benign disease characterized by multiple cutaneous infantile hemangiomas and no or unremarkable visceral lesions. Generally, BNH lesions spontaneously regress within the first 1-2 years of life or within 4 months of onset. However, there have been no detailed reports about the time course of BNH. To our knowledge, 31 cases of BNH without hepatic hemangiomas, excluding this case, have been reported so far. Twenty-one of these cases demonstrated spontaneous regression of the cutaneous hemangiomas without treatment. In all cases, the cutaneous hemangiomas were present at birth. The median age at the beginning of spontaneous regression was 6.0 months (range, 1-12) and the median age at complete or almost complete regression was 15 months (range, 3-28). Cutaneous hemangiomas in BNH without hepatic hemangiomas undergo spontaneous regression within the first year of life.In vegetation stands, plants receive red to far-red ratio (RFR) signals of varying strength from all directions. However, plant responses to variations in RFR reflected from below have been largely ignored despite their potential consequences for plant performance. Using a heterogeneous rose canopy, which consists of **** shoots down in the canopy and vertically growing upright shoots, we quantified upward far-red reflection by **** shoots and its consequences for upright shoot architecture. With a three-dimensional plant model, we assessed consequences of responses to RFR from below for plant photosynthesis. **** shoots reflected substantially more far-red than red light, causing reduced RFR in light reflected upwards. Leaf inclination angles increased in upright shoots which received low RFR reflected from below. The increased leaf angle led to an increase in simulated plant photosynthesis only when this low RFR was reflected off their own **** shoots and not when it reflected off neighbour **** shoots. We conclude that plant response to RFR from below is an under-explored phenomenon which may have contrasting consequences for plant performance depending on the type of vegetation or crop system. The responses are beneficial for performance only when RFR is reflected by lower foliage of the same plants.Metal-organic frameworks (MOF) are recently developed coordination porous materials, and their unique structures are very conducive to catalytic reactions. https://www.selleckchem.com/products/abt-199.html In this paper, p-benzenedicarboxylic acid (PBA)-Ni2+ MOF materials (denoted as PBA-Ni-x, where x represents the initial ratio of PBA to Ni2+ ) were synthesized by a hydrothermal method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and N2 gas adsorption. H2 gas was produced using the synthesized MOF as a photocatalyst and Eosin Y as a photosensitizer. The dependence of the special surface area and thickness of the nanosheets of Ni-MOF on the initial ratio of PBA to Ni2+ (PBA/Ni2+ ) was investigated. The BET surface areas of PBA-Ni-1 PBA-Ni-2 and PBA-Ni-3 are 11.00, 24.61 and 13.04 m2 g-1 , respectively. And the thicknesses of nanosheets are approximately 600-1000, 200-500 and 300-700 nm. Among the three materials, PBA-Ni-2 has the thinnest sheet-like structure and largest surface area. Thus, it displays the highest H2 evolution rate of 20.0 μmol h-1 . The noble-metal-free hydrogen production system is valuable for the application of MOF materials in photocatalytic water splitting.
cted by copyright. All rights reserved.The stability of lavender, lemon balm, mint, sage, and thyme teas was investigated using in-vitro simulation of the digestive system. Kinetics of changes in the total polyphenolic content (TPC) and the antioxidant activity during the in-vitro trials were also evaluated. Results showed that TPC of mint teas decreases the fastest. Mathematical models for prediction of the TPC and the antioxidant activity of prepared teas based on UV-VIS and NIR spectra collected before, during, and after simulation showed that the best prediction was obtained for the wavelength ranges from 410 to 900 nm, 904 to 928 nm, and 1,399 to 1699 nm. It was concluded that the NIR can be used for calibration, validation, and classification of teas prepared from Lamiaceae plants. PRACTICAL APPLICATIONS The bioactives' in-vitro digestion process can successfully be characterized by chemical, spectroscopic, and mathematical analysis. Application of NIR spectroscopy, in combination with multivariate analysis, leads to a reduction of time, costs, and chemical consumption and gives reliable results that pharmaceutical, food, and chemical industries can benefit from.Chronic infantile neurological, cutaneous and articular (CINCA) syndrome is a rare autoinflammatory disease caused by monogenic defects in the NLRP3 gene. Pro-inflammatory cytokines such as interleukin (IL)-1β play a crucial role in the pathogenesis, and IL-1 receptor antagonists have been regarded as the mainstay therapy. Endogenous tumor necrosis factor (TNF)-α was found recently to be involved in the onset of the disease. Here, we report two Chinese children with CINCA syndrome who had elevated serum levels of TNF-α, with one carrying a novel mutation of c.1330T/G (p.444Phe/Val) in exon 3 of the NLRP3 gene. Anti-TNF-α (etanercept) therapy successfully alleviated both clinical symptoms and systemic inflammation after 6 months. These results suggest the complexity of the mechanisms of the disease and that TNF-α blockade will broaden the therapeutic approach for a subset of patients.A 2-day-old Japanese male infant was referred to our outpatient clinic for multiple cutaneous hemangiomas present since birth. Physical examination revealed 14 small, well-circumscribed red papules, scattered over the head, face, dorsum of the right hand, trunk, lower extremities, buttocks and penis. Ultrasound examination revealed no evidence of visceral involvement. Histological examination of a cutaneous lesion was consistent with infantile hemangioma, resulting in the final diagnosis of benign neonatal hemangiomatosis (BNH). The hemangiomas enlarged by 1 month of age and began to resolve at 2 months of age. Within the next month, the lesions had almost completely disappeared. BNH is a rare, non-heritable, self-limited, benign disease characterized by multiple cutaneous infantile hemangiomas and no or unremarkable visceral lesions. Generally, BNH lesions spontaneously regress within the first 1-2 years of life or within 4 months of onset. However, there have been no detailed reports about the time course of BNH. To our knowledge, 31 cases of BNH without hepatic hemangiomas, excluding this case, have been reported so far. Twenty-one of these cases demonstrated spontaneous regression of the cutaneous hemangiomas without treatment. In all cases, the cutaneous hemangiomas were present at birth. The median age at the beginning of spontaneous regression was 6.0 months (range, 1-12) and the median age at complete or almost complete regression was 15 months (range, 3-28). Cutaneous hemangiomas in BNH without hepatic hemangiomas undergo spontaneous regression within the first year of life.In vegetation stands, plants receive red to far-red ratio (RFR) signals of varying strength from all directions. However, plant responses to variations in RFR reflected from below have been largely ignored despite their potential consequences for plant performance. Using a heterogeneous rose canopy, which consists of bent shoots down in the canopy and vertically growing upright shoots, we quantified upward far-red reflection by bent shoots and its consequences for upright shoot architecture. With a three-dimensional plant model, we assessed consequences of responses to RFR from below for plant photosynthesis. Bent shoots reflected substantially more far-red than red light, causing reduced RFR in light reflected upwards. Leaf inclination angles increased in upright shoots which received low RFR reflected from below. The increased leaf angle led to an increase in simulated plant photosynthesis only when this low RFR was reflected off their own bent shoots and not when it reflected off neighbour bent shoots. We conclude that plant response to RFR from below is an under-explored phenomenon which may have contrasting consequences for plant performance depending on the type of vegetation or crop system. The responses are beneficial for performance only when RFR is reflected by lower foliage of the same plants.Metal-organic frameworks (MOF) are recently developed coordination porous materials, and their unique structures are very conducive to catalytic reactions. https://www.selleckchem.com/products/abt-199.html In this paper, p-benzenedicarboxylic acid (PBA)-Ni2+ MOF materials (denoted as PBA-Ni-x, where x represents the initial ratio of PBA to Ni2+ ) were synthesized by a hydrothermal method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and N2 gas adsorption. H2 gas was produced using the synthesized MOF as a photocatalyst and Eosin Y as a photosensitizer. The dependence of the special surface area and thickness of the nanosheets of Ni-MOF on the initial ratio of PBA to Ni2+ (PBA/Ni2+ ) was investigated. The BET surface areas of PBA-Ni-1 PBA-Ni-2 and PBA-Ni-3 are 11.00, 24.61 and 13.04 m2 g-1 , respectively. And the thicknesses of nanosheets are approximately 600-1000, 200-500 and 300-700 nm. Among the three materials, PBA-Ni-2 has the thinnest sheet-like structure and largest surface area. Thus, it displays the highest H2 evolution rate of 20.0 μmol h-1 . The noble-metal-free hydrogen production system is valuable for the application of MOF materials in photocatalytic water splitting.0 Commentarii 0 Distribuiri 34 Views 0 previzualizare
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