The actin cytoskeleton and small G protein RhoA are not involved in flow-dependent activation of ENaC
2010
Background
Epithelial cells are exposed to a variety of mechanical stimuli. Epithelial Na+ channels (ENaC) mediate sodium transport across apical membranes of epithelial cells that line the distal nephron, airway and alveoli, and distal colon. Early investigations into stretch sensitivity of ENaC were controversial. However, recent studies are supportive of ENaC's mechanosensitivity. This work studied whether flow-dependent activation of ENaC is modulated by changes in the state of the actin cytoskeleton and whether small GTPase RhoA is involved in flow-mediated increase of ENaC activity.
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