Orally active, selective vasopressin V1b receptor antagonist in vitro and in vivo.
SSR149415 is an orally active, selective vasopressin V1b receptor antagonist (human/rat Ki in nM = 1.5/1.3/V1b, 91/1050/V1a, 1412/2897/V2, 174/270/OT) that inhibits 30 nM AVP-induced Ca2+ response in human and rat V1b CHO transfectants (Ki = 1.26/2.0 nM). SSR149415 suppresses AVP-mediated physiological responses in vivo, including corticotropin secretion (1-30 mg/kg p.o. or i.p. in rats) upon exogenous AVP administration (0.3 µg/kg alone or 0.03 µg/kg with 0.1 µg corticoliberin/kg via i.v.), restraint stress-Induced corticotropin secretion (EC50 = 10 mg/kg i.p. in rats), and in a murine model of anxiety (four-plate test; 1-10 mg/kg i.p. or 3-10 mg/kg p.o. acute or 10 mg/kg/day p.o.).
Although the hippocampus is known to be important for declarative memory, it is less clear how hippocampal output regulates motivated behaviours, such as social aggression. Here we report that pyramidal neurons in the CA2 region of the hippocampus, which are
Adolescent intermittent ethanol exposure (AIE) produces lasting, sex-specific social anxiety-like alterations in male, but not female rats. Oxytocin (OXT) and vasopressin (AVP) brain systems play opposite roles in regulating social preference/avoidance, with OXT increasing approach to, and AVP increasing avoidance
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![[Arg8]-Vasopressin acetate salt ≥95% (HPLC)](/deepweb/assets/sigmaaldrich/product/structures/282/717/a4c16d4f-e168-4d84-a0e3-59de3e06251e/640/a4c16d4f-e168-4d84-a0e3-59de3e06251e.png)
