PMID- 18952090 OWN - NLM STAT- MEDLINE DCOM- 20090331 LR - 20181113 IS - 1095-6867 (Electronic) IS - 0018-506X (Print) IS - 0018-506X (Linking) VI - 55 IP - 1 DP - 2009 Jan TI - Progesterone reduces the effect of the serotonin 1B/1D receptor antagonist, GR 127935, on lordosis behavior. PG - 169-74 LID - 10.1016/j.yhbeh.2008.09.011 [doi] AB - Ovariectomized rats were hormonally primed with 10 microg estradiol benzoate or with estradiol benzoate plus 500 microg progesterone. Rats received a bilateral infusion with 200 ng of the 5-HT(1B/1D) receptor antagonist, N-[4-methoxy-3-(4-methyl-1-piperazinyl)phenyl]-2'-methyl-4'-(5-methyl-1,2,4-oxadiazol-3-yl)-1-1'-biphenyl-4-carboxamide hydrochloride (GR 127935), into the ventromedial nucleus of the hypothalamus (VMN), followed by a 5 min restraint or home cage experience. In estrogen-primed females that had experienced minimal handling between ovariectomy and use in the experiment, infusion with the water vehicle transiently inhibited lordosis behavior, and the 5-HT(1B/1D) receptor antagonist amplified this inhibition. There were no effects in rats hormonally primed with estrogen and progesterone. Handling for two days before the experiment reduced the effects of the infusions in estrogen-primed rats. However, when a 5 min restraint experience followed infusion with GR 127935, there was a significant decline in lordosis behavior that persisted for 10 to 15 min after the experience. Regardless of the prior experience or type of infusion, the addition of progesterone to the hormonal priming completely prevented the lordosis inhibition. These findings are consistent with prior evidence that progesterone protects against the inhibitory effects of a 5 min restraint experience on lordosis behavior. Moreover, these are the first experiments to demonstrate an inhibitory effect of a selective 5-HT(1B/1D) receptor antagonist in the VMN on lordosis behavior of estrogen primed, but not estrogen and progesterone primed, ovariectomized rats. FAU - Uphouse, Lynda AU - Uphouse L AD - Department of Biology, Texas Woman's University, Denton, TX 76204, USA. Luphouse@mail.twu.edu FAU - Hiegel, Cindy AU - Hiegel C FAU - Guptarak, Jutatip AU - Guptarak J FAU - Maswood, Navin AU - Maswood N LA - eng GR - R25 GM055380/GM/NIGMS NIH HHS/United States GR - R01 HD028419/HD/NICHD NIH HHS/United States GR - R25 GM055380-12/GM/NIGMS NIH HHS/United States GR - GM 55380/GM/NIGMS NIH HHS/United States GR - R01 HD028419-13A2/HD/NICHD NIH HHS/United States GR - R01 HD28419/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20081008 PL - United States TA - Horm Behav JT - Hormones and behavior JID - 0217764 RN - 0 (Estrogens) RN - 0 (Oxadiazoles) RN - 0 (Piperazines) RN - 0 (Serotonin 5-HT1 Receptor Antagonists) RN - 0 (Serotonin Antagonists) RN - 1S4CJB5ZGN (estradiol 3-benzoate) RN - 2LLH6CEB40 (GR 127935) RN - 4G7DS2Q64Y (Progesterone) RN - 4TI98Z838E (Estradiol) SB - IM MH - Analysis of Variance MH - Animals MH - Catheterization MH - Estradiol/analogs & derivatives/pharmacology MH - Estrogens/pharmacology MH - Female MH - Ovariectomy MH - Oxadiazoles/*pharmacology MH - Piperazines/*pharmacology MH - Posture/*physiology MH - Progesterone/*pharmacology MH - Rats MH - Rats, Inbred F344 MH - Restraint, Physical MH - Serotonin 5-HT1 Receptor Antagonists MH - Serotonin Antagonists/*pharmacology MH - Sexual Behavior, Animal/*drug effects MH - Ventromedial Hypothalamic Nucleus/drug effects PMC - PMC2665997 MID - NIHMS93180 EDAT- 2008/10/28 09:00 MHDA- 2009/04/01 09:00 PMCR- 2010/01/01 CRDT- 2008/10/28 09:00 PHST- 2008/07/03 00:00 [received] PHST- 2008/09/25 00:00 [revised] PHST- 2008/09/26 00:00 [accepted] PHST- 2008/10/28 09:00 [pubmed] PHST- 2009/04/01 09:00 [medline] PHST- 2008/10/28 09:00 [entrez] PHST- 2010/01/01 00:00 [pmc-release] AID - S0018-506X(08)00273-0 [pii] AID - 10.1016/j.yhbeh.2008.09.011 [doi] PST - ppublish SO - Horm Behav. 2009 Jan;55(1):169-74. doi: 10.1016/j.yhbeh.2008.09.011. Epub 2008 Oct 8.