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Liver-Secreted Extracellular Vesicles Promote Cirrhosis-Associated Skeletal Muscle Injury Through mtDNA-cGAS/STING Axis.
Adv Sci (Weinh)
January 2025
Department of Gastroenterology and Hepatology and Laboratory of Gastrointestinal Cancer and Liver Disease, West China Hospital, Sichuan University, Chengdu, 610041, China.
Skeletal muscle atrophy (sarcopenia) is a serious complication of liver cirrhosis, and chronic muscle inflammation plays a pivotal role in its pathologenesis. However, the detailed mechanism through which injured liver tissues mediate skeletal muscle inflammatory injury remains elusive. Here, it is reported that injured hepatocytes might secrete mtDNA-enriched extracellular vesicles (EVs) to trigger skeletal muscle inflammation by activating the cGAS-STING pathway.
View Article and Find Full Text PDFDirect cytosol delivery of mRNA by micron-sized co-assembly with designer oligopeptides.
J Mater Chem B
January 2025
Chemical and Biological Engineering Department, The Hong Kong University of Science and Technology, Hong Kong SAR, China.
Inefficient endosomal escape has been regarded as the main bottleneck for intracellular nucleic acid delivery. While most research efforts have been spent on designing various nano-sized particles, we took a different path here, investigating micron-sized carriers for direct cytosol entry. Using the spontaneous co-assembly of mRNA and the designer 27 amino acid oligopeptide named pepMAX2, micron-sized co-assemblies were obtained with various sizes by altering the concentration of NaCl salt and time for pre-incubation.
View Article and Find Full Text PDFThe levels of biogenesis of lysosome organelles complex 1 subunit 1 (BLOC1S1) control mitochondrial and endolysosome organelle homeostasis and function. Reduced fidelity of these vacuolar organelles is increasingly being recognized as important in instigating cell-autonomous immune cell activation. We reasoned that exploring the role of BLOC1S1 in CD4 T cells, may further advance our understanding of regulatory events linked to mitochondrial and/or endolysosomal function in adaptive immunity.
View Article and Find Full Text PDFAn Assay System for Plate-based Detection of Endogenous Peptide:-glycanase/NGLY1 Activity Using A Fluorescence-based Probe.
Bio Protoc
January 2025
Glycometabolic Biochemistry Laboratory, RIKEN Cluster for Pioneering Research, Riken, 2-1 Hirosawa, Wako Saitama, Japan.
Cytosolic peptide:-glycanase (PNGase/NGLY1 in mammals), an amidase classified under EC:3.5.1.
View Article and Find Full Text PDFInsulin and myometrial contractility; Are there any links? A narrative review.
Reprod Biol
January 2025
School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. Electronic address:
Contrary to the evidence supporting the role for insulin in stimulating uterine contraction, only a limited number of studies have highlighted the inhibitory effect of insulin on myometrial contractions in human and rodent. A hypothetical narrative review of the current literature was conducted, revealing the current literature and shows the potential inhibitory effects of insulin on myometrial contractility. These inhibitory mechanisms include activation of adenylyl cyclase signaling pathways, an increase in cAMP production, a decrease in Ca influx and cytosolic Ca, hyperpolarization of the cell membrane, and stimulation of NO synthesis.
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