Journal
CELL BIOCHEMISTRY AND BIOPHYSICS
Volume 35, Issue 3, Pages 263-274Publisher
HUMANA PRESS INC
DOI: 10.1385/CBB:35:3:263
Keywords
chloride channel; cell volume; RhoA; caveola; tyrosine kinase
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Restoration of cell volume after cell swelling in mammalian cells is achieved by the loss of solutes (K+, Cl-, and organic osmolytes) and the subsequent osmotically driven efflux of water. This process is generally known as regulatory volume decrease (RVD). One pathway for the swelling induced loss of Cl- (and also organic osmolytes) during RVD is the volume-regulated anion channel (VRAC). In this review, we discuss the physiological role and cellular control of VRAC. We will first highlight evidence that VRAC is more than a volume regulator and that it participates in other fundamental cellular processes such as cell proliferation and apoptosis. The second part concentrates on the Rho/Rho kinase/myosin phosphorylation cascade and on compartmentalization in caveolae as modulators of the signal transduction cascade that controls VRAC gating in vascular endothelial cells.
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