87 mA·cm -2 and turnover frequency of 1,962 h -1 at a mild overpotential of 620 mV for CO formation with 97% Faradic efficiency. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.The understanding of biomolecular function is coupled to knowledge about the structure and dynamics of these biomolecules, preferably acquired under native conditions. In this regard, pulsed dipolar EPR spectroscopy (PDS) in conjunction with site-directed spin labeling (SDSL) is an important method in the toolbox of biophysical chemistry. However, the currently available spin labels have diverse deficiencies for in-cell applications, for example, low radical stability or long bioconjugation linkers. In this work, a synthesis strategy is introduced for the derivatization of trityl radicals with a maleimide-functionalized methylene group. The resulting trityl spin label, called SLIM, yields narrow distance distributions, enables highly sensitive distance measurements down to concentrations of 90 nm, and shows high stability against reduction. Using this label, the guanine-nucleotide dissociation inhibitor (GDI) domain of Yersinia outer protein O (YopO) is shown to change its conformation within eukaryotic cells. © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.In treatment of hypoxic tumors, oxygen-dependent photodynamic therapy (PDT) is considerably limited. Herein, a new bimetallic and biphasic Rh-based core-shell nanosystem (Au@Rh-ICG-CM) is developed to address tumor hypoxia while achieving high PDT efficacy. Such porous Au@Rh core-shell nanostructures are expected to exhibit catalase-like activity to efficiently catalyze oxygen generation from endogenous hydrogen peroxide in tumors. Coating Au@Rh nanostructures with tumor cell membrane (CM) enables tumor targeting via homologous binding. As a result of the large pores of Rh shells and the trapping ability of CM, the photosensitizer indocyanine green (ICG) is successfully loaded and retained in the cavity of Au@Rh-CM. Au@Rh-ICG-CM shows good biocompatibility, high tumor accumulation, and superior fluorescence and photoacoustic imaging properties. Both in vitro and in vivo results demonstrate that Au@Rh-ICG-CM is able to effectively convert endogenous hydrogen peroxide into oxygen and then elevate the production of tumor-toxic singlet oxygen to significantly enhance PDT. As noted, the mild photothermal effect of Au@Rh-ICG-CM also improves PDT efficacy. By integrating the superiorities of hypoxia regulation function, tumor accumulation capacity, bimodal imaging, and moderate photothermal effect into a single nanosystem, Au@Rh-ICG-CM can readily serve as a promising nanoplatform for enhanced cancer PDT. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.In drug delivery to the human brain, blood vessels are a significant hurdle because they restrict the entry of most solutes to protect brain. To overcome this hurdle, an in vitro 3D model for brain endothelial barrier is developed using a microfluidic device with hydrogel providing a 3D extracellular matrix scaffold. Using the model, peptides known to utilize receptor-mediated transcytosis are verified, which has been one of the most promising mechanisms for brain-specific penetration. The cytotoxicity and cellular damage to the peptide are investigated and the receptor-mediated transcytosis and brain endothelial specific penetrating abilities of the peptides in a quantitative manner are demonstrated. As a preclinical test, applying the quantification assays conducted in this study are suggested, including the penetrating ability, cytotoxicity, endothelial damage, and receptor specificity. Using this microfluidic device as an in vitro platform for evaluating various brain targeting drugs and drug carrier candidates is also proposed. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.Cyanogramide ( 1 ) from marine-derived Actinoalloteichus cyanogriseus WH1-2216-6 features a unique spirooxindole skeleton and exhibits significant bioactivity to efficiently reverse the multiple drug resistance of tumor cells. The biosynthetic gene cluster of 1 was identified and refactored by promoter engineering for heterologous expression in Streptomyces coelicolor YF11, enabling the production of 1 and five new derivatives. Interesting, four of them, including 1 , are identified as enantiomeric mixtures in different ratios. Functions of tailoring enzymes, including two methyltransferases CyaEF, and three cytochrome P450 monooxygenases CyaGHI, were confirmed by gene inactivation and feeding experiments, leading to the elucidation of a concise biosynthetic pathway for 1 . Notably, CyaH was biochemically verified to catalyze formation of the spirooxindole skeleton in 1 through an unusual carbocation-mediated semipinacol-type rearrangement reaction . © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.BACKGROUND There is limited research quantifying the direct and indirect economic costs associated with intellectual disability (ID) in Australia. Costs incurred by families, governments and broader society include time spent providing care, absenteeism and increased healthcare utilisation. The purpose of this research is to quantify the costs associated with ID in childhood using a range of methods to collect cost data. METHODS Costs included healthcare service utilisation, pharmaceutical use, caregiver productivity losses and time spent providing care because of the child's disability. The sample comprised caregivers with a child with ID aged between 2 and 10 years old recruited in Australia. Healthcare service utilisation and pharmaceutical use were obtained from routinely collected administrative claims data. Healthcare utilisation not captured in the routinely collected administrative data and absenteeism data were obtained from a retrospective recall-based questionnaire. https://www.selleckchem.com/products/cevidoplenib-dimesylate.html Time spent providing care because of the child's disability was obtained using a time-use diary. RESULTS The total cost of ID in Australia was estimated to be AUD 72 027 per year per child, and the total cost of ID in childhood was estimated to be AUD 12.5 billion per year. The cost to governments of ID in childhood was estimated to be AUD 6385 per child per year, resulting in a total cost to government of AUD 1.1 billion per year. CONCLUSIONS This is the first study to estimate the direct and indirect costs associated with ID in childhood. The results of this research demonstrate the considerable economic impact of ID in childhood on families, governments and broader society in terms of both direct and indirect costs. An understanding of the cost implications of any intervention are critical in assisting policymakers in planning and prioritising of health services. © 2020 MENCAP and International Association of the Scientific Study of Intellectual and Developmental Disabilities and John Wiley & Sons Ltd.