OPC-21268 is a vasopressin V1a selective antagonist.
OPC-21268 is one of 2 non-peptide V1a selective antagonists, along with SR-49059. Arginine vasopressin (AVP) is a hormone that plays an important part in circulatory and water homoeostasis and is important in renal hemodynamic alterations, water retention, and cardiac remodeling in congestive heart failure (CHF). There are three AVP receptor subtypes-V1a, V1b, and V2 - all belong to the large rhodopsin-like G-protein-coupled receptor family. V(1a) antagonists improve water balance and cardiac hypertrophy in CHF and might be beneficial for the treatment of water retention and cardiac remodeling in CHF.
American journal of physiology. Endocrinology and metabolism, 285(6), E1161-E1166 (2003-08-14)
Although arginine vasopressin (AVP), an antidiuretic hormone, has been widely acknowledged to play an important role in cardiovascular regulation via V1a receptors (V1aR), its precise significance remains unclear. In this study, we investigated the effects of long-standing high plasma AVP
Clinical science (London, England : 1979), 105(1), 1-8 (2003-03-18)
Vasopressin, or antidiuretic hormone, is a peptide hormone that is released from the posterior pituitary gland in response to changes in blood pressure and plasma osmolality. The main pathophysiological states associated with high plasma vasopressin concentrations are cirrhosis, cardiac failure
General and comparative endocrinology, 157(2), 196-202 (2008-06-17)
Anuran amphibians do not drink orally but absorb water osmotically through the highly permeable ventral skin. In this cutaneous water absorption, roles of the putative cerebral osmoreceptors and functions of arginine vasotocin (AVT) were examined in the central nervous system
Journal of pharmacological sciences, 95(1), 47-55 (2004-05-22)
Effects of V(1) (OPC-21268) and V(2) (OPC-31260) vasopressin antagonists on blood pressure (BP) short-term variability were investigated in adult spontaneously hypertensive rats (SHR) under basal conditions and after the stimulation of vasopressin release by hemorrhage. BP was recorded intra-arterially and
The present study is an investigation of the responses of the cardiovascular system and Fos expression to intracerebroventricular (i.c.v.) administration of hypertonic saline (HS) in conscious arginine vasopressin (AVP)-overexpressing transgenic (Tg) and control rats. Central HS (0.3, 0.67, or 1.0M
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