The index SNP of 1p21 is an eQTL (P
=1.74×10
) for
involved in SUMOlation and is associated with platelet distribution width (1.15×10
) and 18-carbon fatty acid metabolism (P=7.36×10
). In gene-based analysis we identified three genes (
,
) at P<2.7×10
. 11 of 32 candidate gene loci studied in Indians replicated (P<0.05), and 21 of 32 loci identified through previous GWAS replicated based on directionality of effect.
This first GWAS of stroke in Indians identified novel loci and replicated previously known loci. For the first time, genetic variants in the SUMOlation pathway which has been implicated in brain ischemia were identified.
This first GWAS of stroke in Indians identified novel loci and replicated previously known loci. For the first time, genetic variants in the SUMOlation pathway which has been implicated in brain ischemia were identified.Opioids play an important role in pain relief, but repeated exposure results in tolerance and dependence. To make opioids more effective and useful, research in the field has focused on reducing the tolerance and dependence for chronic pain relief. Here, we showed the effect of ABIN-1 in modulating morphine function. We used hotplate tests and CPP tests to show that overexpression of ABIN-1 in the **** brain attenuated morphine dependence. These effects of ABIN-1 are most likely mediated through the formation of ABIN-1-β-arrestin2 complexes, which accelerate β-arrestin2 degradation by ubiquitination. With the degradation of β-arrestin2, ABIN-1 overexpression also decreased MOR phosphorylation and internalization following opioid treatment, affecting the β-arrestin2-dependent signaling pathway to regulate morphine tolerance. Importantly, the effect of ABIN-1 on morphine tolerance was abolished in β-arrestin2 knockout ****. Taken together, these results suggest that the interaction between ABIN-1 and β-arrestin2 inhibits MOR internalization to attenuate morphine tolerance, revealing a novel mechanism for MOR regulation. Hence, ABIN-1 may be a therapeutic target to regulate MOR internalization, thus providing a foundation for a novel treatment strategy for alleviating morphine tolerance and dependence. Significance Statement ABIN-1 overexpression in **** brain attenuated morphine tolerance and dependence. The mechanism may be that ABIN-1-β-arrestin-2 complex formation facilitated β-arrestin-2 degradation by ubiquitination. ABIN-1 targeted β-arrestin2 to regulate morphine tolerance Therefore, inhibiting of ABIN-1 is an important strategy to prevent morphine tolerance and dependence.The 14-3-3 proteins constitute a family of regulatory adapter proteins with many binding partnersand biological functions, and are considered promising drug targets in cancer and neuropsychiatry.By screening 1280 small-molecule drugs using differential scanning fluorimetry (DSF), we found 15 compounds that decreased the thermal stability of 14-3-3ζ. Among these compounds, ebselen was identified as a covalent, destabilizing ligand of 14-3-3 isoforms ζ, ε, γ and η. Ebselen bonding decreased 14-3-3ζ binding to its partner Ser19-phosphorylated tyrosine hydroxylase. Characterization of site-directed mutants at cysteine residues in 14-3-3ζ (C25, C94, and C189) by DSF and mass spectroscopy revealed covalent modification by ebselen of all cysteines. C25 was identified as the preferential site of ebselen interaction in vitro, whereas modification of C94 was mainly responsible for the protein destabilization. https://www.selleckchem.com/products/ide397-gsk-4362676.html At therapeutic relevant concentrations ebselen caused a decrease of 14-3-3 levels in both SHSY5Y cells and zebr cancer, bipolar disorder and the virus infection Covid-19, covalently bonds to cysteine residues in 14-3-3 adaptor proteins, triggering 14-3-3 destabilization and degradation in cells and intact brain tissue when used in therapeutic concentrations, potentially explaining the behavioral and anti-neoplastic effects of this drug.The non-taxane microtubule inhibitor, eribulin, is an approved therapeutic for metastatic breast cancer and liposarcoma. Eribulin was previously tested in unselected lung cancer patients and yielded a modest objective response rate of ~5-12 percent. Because lung cancers represent diverse histologies and driving oncogenic mutations, we postulated that eribulin may exhibit properties of a precision oncology agent with a previously undefined specificity for a molecularly distinct subset of lung cancers. Herein, we screened a panel of 44 non-small cell and small cell lung cancer cell lines for in vitro growth sensitivity to eribulin. The results revealed a greater than 15,000-fold range in eribulin sensitivity (IC50 = 0.005 - 89 nM) amongst the cell lines that was not correlated with their sensitivity to the taxane-based inhibitor, paclitaxel. The quartile of cell lines exhibiting the lowest eribulin IC50 values was not enriched for specific histologies, epithelial-mesenchymal differentiation or specific oncogene highest sensitivity to eribulin bear TP53 null phenotypes, supporting a rationale to consider the status of this tumor suppressor in the clinical setting.Pulmonary arterial hypertension (PAH) is characterized by elevated pulmonary arterial pressure and carries a very poor prognosis. Understanding PAH pathogenesis is needed to develop new therapeutic strategies. TGF-β drives vascular remodeling and increases vascular resistance by regulating differentiation and proliferation of smooth muscle cells (SMCs). Also, sphingosine-1-phosphate (S1P) has been implicated in PAH but the relation between these two signaling mechanisms is not well understood. Here, we characterize the signaling networks downstream of TGF-β in human pulmonary arterial smooth muscle cells (HPASMCs) which involves SMAD signaling as well as Rho GTPases. Activation of Rho GTPases regulates myocardin-related transcription factor (MRTF) and serum response factor (SRF) transcription activity and results in upregulation of contractile gene expression. Our data show that in HPASMCs, upregulation of alpha smooth muscle actin (αSMA) by TGF-β is dependent on both SMAD and Rho/MRTF-A/SRF transcriptional mechanisms.
The index SNP of 1p21 is an eQTL (P
=1.74×10
) for
involved in SUMOlation and is associated with platelet distribution width (1.15×10
) and 18-carbon fatty acid metabolism (P=7.36×10
). In gene-based analysis we identified three genes (
,
) at P<2.7×10
. 11 of 32 candidate gene loci studied in Indians replicated (P<0.05), and 21 of 32 loci identified through previous GWAS replicated based on directionality of effect.
This first GWAS of stroke in Indians identified novel loci and replicated previously known loci. For the first time, genetic variants in the SUMOlation pathway which has been implicated in brain ischemia were identified.
This first GWAS of stroke in Indians identified novel loci and replicated previously known loci. For the first time, genetic variants in the SUMOlation pathway which has been implicated in brain ischemia were identified.Opioids play an important role in pain relief, but repeated exposure results in tolerance and dependence. To make opioids more effective and useful, research in the field has focused on reducing the tolerance and dependence for chronic pain relief. Here, we showed the effect of ABIN-1 in modulating morphine function. We used hotplate tests and CPP tests to show that overexpression of ABIN-1 in the mice brain attenuated morphine dependence. These effects of ABIN-1 are most likely mediated through the formation of ABIN-1-β-arrestin2 complexes, which accelerate β-arrestin2 degradation by ubiquitination. With the degradation of β-arrestin2, ABIN-1 overexpression also decreased MOR phosphorylation and internalization following opioid treatment, affecting the β-arrestin2-dependent signaling pathway to regulate morphine tolerance. Importantly, the effect of ABIN-1 on morphine tolerance was abolished in β-arrestin2 knockout mice. Taken together, these results suggest that the interaction between ABIN-1 and β-arrestin2 inhibits MOR internalization to attenuate morphine tolerance, revealing a novel mechanism for MOR regulation. Hence, ABIN-1 may be a therapeutic target to regulate MOR internalization, thus providing a foundation for a novel treatment strategy for alleviating morphine tolerance and dependence. Significance Statement ABIN-1 overexpression in mice brain attenuated morphine tolerance and dependence. The mechanism may be that ABIN-1-β-arrestin-2 complex formation facilitated β-arrestin-2 degradation by ubiquitination. ABIN-1 targeted β-arrestin2 to regulate morphine tolerance Therefore, inhibiting of ABIN-1 is an important strategy to prevent morphine tolerance and dependence.The 14-3-3 proteins constitute a family of regulatory adapter proteins with many binding partnersand biological functions, and are considered promising drug targets in cancer and neuropsychiatry.By screening 1280 small-molecule drugs using differential scanning fluorimetry (DSF), we found 15 compounds that decreased the thermal stability of 14-3-3ζ. Among these compounds, ebselen was identified as a covalent, destabilizing ligand of 14-3-3 isoforms ζ, ε, γ and η. Ebselen bonding decreased 14-3-3ζ binding to its partner Ser19-phosphorylated tyrosine hydroxylase. Characterization of site-directed mutants at cysteine residues in 14-3-3ζ (C25, C94, and C189) by DSF and mass spectroscopy revealed covalent modification by ebselen of all cysteines. C25 was identified as the preferential site of ebselen interaction in vitro, whereas modification of C94 was mainly responsible for the protein destabilization. https://www.selleckchem.com/products/ide397-gsk-4362676.html At therapeutic relevant concentrations ebselen caused a decrease of 14-3-3 levels in both SHSY5Y cells and zebr cancer, bipolar disorder and the virus infection Covid-19, covalently bonds to cysteine residues in 14-3-3 adaptor proteins, triggering 14-3-3 destabilization and degradation in cells and intact brain tissue when used in therapeutic concentrations, potentially explaining the behavioral and anti-neoplastic effects of this drug.The non-taxane microtubule inhibitor, eribulin, is an approved therapeutic for metastatic breast cancer and liposarcoma. Eribulin was previously tested in unselected lung cancer patients and yielded a modest objective response rate of ~5-12 percent. Because lung cancers represent diverse histologies and driving oncogenic mutations, we postulated that eribulin may exhibit properties of a precision oncology agent with a previously undefined specificity for a molecularly distinct subset of lung cancers. Herein, we screened a panel of 44 non-small cell and small cell lung cancer cell lines for in vitro growth sensitivity to eribulin. The results revealed a greater than 15,000-fold range in eribulin sensitivity (IC50 = 0.005 - 89 nM) amongst the cell lines that was not correlated with their sensitivity to the taxane-based inhibitor, paclitaxel. The quartile of cell lines exhibiting the lowest eribulin IC50 values was not enriched for specific histologies, epithelial-mesenchymal differentiation or specific oncogene highest sensitivity to eribulin bear TP53 null phenotypes, supporting a rationale to consider the status of this tumor suppressor in the clinical setting.Pulmonary arterial hypertension (PAH) is characterized by elevated pulmonary arterial pressure and carries a very poor prognosis. Understanding PAH pathogenesis is needed to develop new therapeutic strategies. TGF-β drives vascular remodeling and increases vascular resistance by regulating differentiation and proliferation of smooth muscle cells (SMCs). Also, sphingosine-1-phosphate (S1P) has been implicated in PAH but the relation between these two signaling mechanisms is not well understood. Here, we characterize the signaling networks downstream of TGF-β in human pulmonary arterial smooth muscle cells (HPASMCs) which involves SMAD signaling as well as Rho GTPases. Activation of Rho GTPases regulates myocardin-related transcription factor (MRTF) and serum response factor (SRF) transcription activity and results in upregulation of contractile gene expression. Our data show that in HPASMCs, upregulation of alpha smooth muscle actin (αSMA) by TGF-β is dependent on both SMAD and Rho/MRTF-A/SRF transcriptional mechanisms.
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