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Unlabelled: Compartmentalization of the nucleus into heterochromatin and euchromatin is highly conserved across eukaryotes. Constitutive heterochromatin (C-Het) constitutes a liquid-like condensate that packages the repetitive regions of the genome through the enrichment of histone modification H3K9me3 and recruitment of its cognate reader protein Heterochromatin Protein-1 (HP1a). The ability for well-ordered nucleosome arrays and HP1a to independently form biomolecular condensates suggests that the emergent material properties of C-Het compartments may contribute to its functions such as force-buffering, dosage-dependent gene silencing, and selective permeability.
View Article and Find Full Text PDFHow SNARE proteins generate force to fuse membranes.
Biophys J
January 2025
Department of Chemical Engineering, Columbia University, New York, NY 10027. Electronic address:
Membrane fusion is central to fundamental cellular processes such as exocytosis, when an intracellular machinery fuses membrane-enclosed vesicles to the plasma membrane for contents release. The core machinery components are the SNARE proteins. SNARE complexation pulls the membranes together, but the fusion mechanism remains unclear.
View Article and Find Full Text PDFThe eukaryotic elongation factor 2 kinase inhibitor, A484954, induces hypoglycaemic and hypotensive effects.
Br J Pharmacol
January 2025
Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Towada, Japan.
Background And Purpose: Eukaryotic elongation factor 2 kinase (eEF2K) belongs to the Ca/calmodulin-dependent protein kinase family. We previously revealed that A484954, a selective eEF2K inhibitor, caused hypotensive and diuretic effects via the production of nitric oxide (NO) in spontaneously hypertensive rats. Otsuka Long-Evans Tokushima Fatty (OLETF) rats are hypertensive because of obesity and type 2 diabetes.
View Article and Find Full Text PDFDynamic-Wetting Liquid Metal Thin Layer Induced via Surface Oxygen-Containing Functional Groups.
ACS Nano
January 2025
CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
Enhancing the wettability of liquid metals (LMs) to address their high surface tensions is crucial for practical applications. However, controlling LMs wetting on various substrates and understanding the underlying mechanisms are challenging. Here, we present a facile dynamic-wetting strategy to modulate eutectic gallium-indium (EGaIn) wettability via chemical surface modification, spontaneously forming a stable and thin (∼18 μm) EGaIn layer.
View Article and Find Full Text PDFK7 channels modulate tension and calcium signalling in mouse corpus cavernosum.
Am J Physiol Cell Physiol
January 2025
Smooth Muscle Research Centre, Dundalk Institute of Technology, Dundalk, Ireland.
Adrenergic stimulation induces contractions in the corpus cavernosum smooth muscle (CCSM) that are important in maintaining penile flaccidity. The aim of this study was to investigate the role of K7 channels in regulating contractions and their underlying Ca signals in mouse CCSM. Quantitative PCR revealed transcriptional expression of KCNQ1 and KCNQ3-5 genes in whole CCSM, with KCNQ5 as the most highly transcribed K7 encoding gene.
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