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Annotation 1419666656524

V2 receptor (V2R) differs from V1R primarily in the number of sites susceptible to N-linked glycosylation; the V1R has sites at both the amino-terminus and at the extracellular loop, whereas the V2R has a single site at the extracellular amino-terminus.[1]

The well known antidiuretic effect of vasopressin occurs via activation of V2R.[1] Vasopressin regulates water excretion from the kidney by increasing the osmotic water permeability of the renal collecting duct – an effect that is explained by coupling of the V2R with the Gs signaling pathway, which activates cAMP. Interestingly, the V2R continues to activate Gs after being internalized by β-arrestin rather than being desensitized. This internalized Gs signaling by V2R is explained by the receptors ability to form "mega-complexes" consisting of a single V2R, β-arrestin, and heterotrimeric Gs.[3] The increased intracellular cAMP in the kidney in turn triggers fusion of aquaporin-2-bearing vesicles with the apical plasma membrane of the collecting duct principal cells, increasing water reabsorption.[1]
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Vasopressin receptor - Wikipedia
luminal membrane of the collecting duct limit the antidiuretic action of vasopressin. Additionally, vasopressin selectively contracts efferent arterioles probably through the V 1 R, but not the afferent arteriole. [1] V 2 receptor[edit] <span>V 2 receptor (V 2 R) differs from V 1 R primarily in the number of sites susceptible to N-linked glycosylation; the V 1 R has sites at both the amino-terminus and at the extracellular loop, whereas the V 2 R has a single site at the extracellular amino-terminus. [1] The well known antidiuretic effect of vasopressin occurs via activation of V 2 R. [1] Vasopressin regulates water excretion from the kidney by increasing the osmotic water permeability of the renal collecting duct – an effect that is explained by coupling of the V 2 R with the G s signaling pathway, which activates cAMP. Interestingly, the V 2 R continues to activate G s after being internalized by β-arrestin rather than being desensitized. This internalized G s signaling by V 2 R is explained by the receptors ability to form "mega-complexes" consisting of a single V 2 R, β-arrestin, and heterotrimeric G s . [3] The increased intracellular cAMP in the kidney in turn triggers fusion of aquaporin-2-bearing vesicles with the apical plasma membrane of the collecting duct principal cells, increasing water reabsorption. [1] V 3 receptor[edit] The human V 3 receptor (V 3 R, previously known as V 1B R) is a G-protein-coupled pituitary receptor that, because of its scarcity, was only recently characteri



Annotation 1419669015820

V1 receptors (V1Rs) are found in high density on vascular smooth muscle and cause vasoconstriction by an increase in intracellular calcium via the phosphatidyl–inositol-bisphosphonate cascade.[1] Cardiac myocytes also possess V1R. Additionally V1R are located in brain, testis, superior cervical ganglion, liver, blood vessels, and renal medulla.[1]

V1R is present on platelets, which upon stimulation induces an increase in intracellular calcium, facilitating thrombosis. Studies have indicated that due to polymorphism of platelet V1R there is significant heterogeneity in the aggregation response of normal human platelets to vasopressin.[1]

V1Rs are found in kidney, where they occur in high density on medullary interstitial cells, vasa recta, and epithelial cells of the collecting duct.[1] Vasopressin acts on medullary vasculature through V1R to reduce blood flow to inner medulla without affecting blood flow to outer medulla. V1Rs on the luminal membrane of the collecting duct limit the antidiuretic action of vasopressin. Additionally, vasopressin selectively contracts efferent arterioles probably through the V1R, but not the afferent arteriole.[1]
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Vasopressin receptor - Wikipedia
f collecting duct, vascular endothelium and vascular smooth muscle cell insertion of AQP-2 water channels into apical membrane, induction of AQP-2 synthesis, releases von Willebrand factor and factor VIII, vasodilation V 1 receptor[edit] <span>V 1 receptors (V 1 Rs) are found in high density on vascular smooth muscle and cause vasoconstriction by an increase in intracellular calcium via the phosphatidyl–inositol-bisphosphonate cascade. [1] Cardiac myocytes also possess V 1 R. Additionally V 1 R are located in brain, testis, superior cervical ganglion, liver, blood vessels, and renal medulla. [1] V 1 R is present on platelets, which upon stimulation induces an increase in intracellular calcium, facilitating thrombosis. Studies have indicated that due to polymorphism of platelet V 1 R there is significant heterogeneity in the aggregation response of normal human platelets to vasopressin. [1] V 1 Rs are found in kidney, where they occur in high density on medullary interstitial cells, vasa recta, and epithelial cells of the collecting duct. [1] Vasopressin acts on medullary vasculature through V 1 R to reduce blood flow to inner medulla without affecting blood flow to outer medulla. V 1 Rs on the luminal membrane of the collecting duct limit the antidiuretic action of vasopressin. Additionally, vasopressin selectively contracts efferent arterioles probably through the V 1 R, but not the afferent arteriole. [1] V 2 receptor[edit] V 2 receptor (V 2 R) differs from V 1 R primarily in the number of sites susceptible to N-linked glycosylation; the V 1 R has sites at both the amino-terminus a