Signal transduction of V1-vascular vasopressin receptors.
This review covers the recent developments gained in the exploration of V1-vascular vasopressin (AVP) receptors. We examine the different radioligands available for the pharmacological characterization of these receptors. The immediate transmembrane signaling of V1-vascular AVP receptors involves ligand-receptor complex formation, receptor lateral mobility and internalization, coupling to a Gq protein, activation of phospholipases A2, C and D, translocation and activation of protein kinase C, production of inositol 1,4,5-triphosphate and 1,2-diacylglycerol, mobilization of intracellular calcium, alteration of intracellular pH with activation of the Na+/H+ exchanger, calmodulin activation and myosin light chain phosphorylation. The secondary nuclear signal mechanisms triggered by activation of V1-vascular AVP receptors includes tyrosine phosphorylation, induction of gene expression and protein synthesis.
Thibonnier
M
M
Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106-4982.
D000818:Animals; D001127:Arginine Vasopressin / Q000378:metabolism*; D001808:Blood Vessels / Q000378:metabolism*; D006801:Humans; D011945:Receptors, Angiotensin / Q000378:metabolism*; D017483:Receptors, Vasopressin; D015398:Signal Transduction
D011945:Receptors, Angiotensin; D017483:Receptors, Vasopressin; D001127:Arginine Vasopressin