Abstract
Background/Aims: The potential role of caveolin-1 in modulating angiogenesis in microgravity environment is unexplored. Methods: Using simulated microgravity by clinostat, we measured the expressions and interactions of caveolin-1 and eNOS in human umbilical vein endothelial cells. Results: We found that decreased caveolin-1 expression is associated with increased expression and phosphorylation levels of eNOS in endothelial cells stimulated by microgravity, which causes a dissociation of eNOS from caveolin-1 complexes. As a result, microgravity induces cell migration and tube formation in endothelial cell in vitro that depends on the regulations of caveolin-1. Conclusion: Our study provides insight for the important endothelial functions in altered gravitational environments.
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