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- W3091896233 endingPage "104001" @default.
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- W3091896233 abstract "Microgravity induces injury of intestinal barrier. However, the underlying mechanism remains unclear. The present study aimed to investigate the pathological change of intestinal mucosa induced by long term simulated microgravity and to explore its etiological mechanism using a proteomic approach. The well accepted tail-suspended rat model was used to simulate microgravity. The damage of rat small intestine was evaluated via histological and molecular test, and a label-free comparative proteomic strategy was used to determine the molecular mechanism. Simulated microgravity for 21 days damaged intestine barrier with decreased numbers of the goblet cells, large intercellular space, and down-regulated adhesion molecules, accompanied by increased intestinal permeability. Proteomic analysis identified 416 differentially expressed proteins and showed simulated microgravity dramatically down-regulated the adhesion molecules and deteriorated several pathways for metabolism, focal adhesion, and regulation of actin cytoskeleton. Western-blot analysis confirmed that myosin regulatory light chain (MLC) 12B was significantly down-regulated, while rho-associated protein kinase, myosin light chain kinase (MLCK), and phosphorylated MLC were dramatically up-regulated. Taken together, these data reveal that down-regulation of adhesion molecules and MLCK dependent up-regulation MLC phosphorylation mediate intestinal barrier dysfunction during simulated microgravity injury. Our results also indicate that regulation of epithelial MLCK is a potential target for the therapeutic treatment of microgravity injury." @default.
- W3091896233 created "2020-10-15" @default.
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- W3091896233 date "2021-01-01" @default.
- W3091896233 modified "2023-10-16" @default.
- W3091896233 title "Myosin light chain kinase mediates intestinal barrier dysfunction following simulated microgravity based on proteomic strategy" @default.
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- W3091896233 doi "https://doi.org/10.1016/j.jprot.2020.104001" @default.
- W3091896233 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33035716" @default.
- W3091896233 hasPublicationYear "2021" @default.
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