PMID- 15135976 OWN - NLM STAT- MEDLINE DCOM- 20040719 LR - 20171116 IS - 0166-4328 (Print) IS - 0166-4328 (Linking) VI - 152 IP - 1 DP - 2004 Jun 4 TI - Effect of estrogen on the lordosis-inhibiting action of ketanserin and SB 206553. PG - 129-35 AB - The effects of the 5-HT(2A/2C) receptor antagonist, ketanserin, and the 5-HT(2C) receptor antagonist, SB 206553, on lordosis behavior were investigated in ovariectomized rats hormonally primed with estradiol benzoate (EB) (0.5 or 25 microg) and progesterone (500 microg). Both ketanserin and SB 206553 inhibited lordosis behavior after infusion into the ventromedial nucleus of the hypothalamus (VMN), but ketanserin was slightly more effective than the 5-HT(2C) receptor antagonist. Either drug was more effective in rats primed with 0.5 microg EB than in rats hormonally primed with 25 microg EB. These findings support the suggestion that estrogen may enhance functioning of the 5-HT(2) receptor family and thereby protect against the 5-HT(2) receptor antagonists. These data are consistent with prior suggestions that estrogen modulates functioning of 5-HT(2) receptors within the VMN and that 5-HT(2) receptors play a facilitatory role in the modulation of female rat lordosis behavior. FAU - Sinclair-Worley, L AU - Sinclair-Worley L AD - Department of Biology, Texas Woman's University, Denton, TX 76204, USA. FAU - Uphouse, L AU - Uphouse L LA - eng GR - F32 HD 08413/HD/NICHD NIH HHS/United States GR - R01 HD 28419/HD/NICHD NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Behav Brain Res JT - Behavioural brain research JID - 8004872 RN - 0 (Indoles) RN - 0 (Pyridines) RN - 0 (Serotonin Antagonists) RN - 1S4CJB5ZGN (estradiol 3-benzoate) RN - 4G7DS2Q64Y (Progesterone) RN - 4TI98Z838E (Estradiol) RN - 76330-73-9 (ketanserinol) RN - 97F9DE4CT4 (Ketanserin) RN - AL4387525T (SB 206553) SB - IM MH - Analysis of Variance MH - Animals MH - Dose-Response Relationship, Drug MH - Drug Interactions MH - Estradiol/*analogs & derivatives/*pharmacology MH - Female MH - Hypothalamus, Middle/anatomy & histology/drug effects MH - Indoles/*pharmacology MH - Ketanserin/*analogs & derivatives/*pharmacology MH - Posture MH - Progesterone/*pharmacology MH - Pyridines/*pharmacology MH - Rats MH - Rats, Inbred F344 MH - Serotonin Antagonists/*pharmacology MH - Sexual Behavior, Animal/*drug effects MH - Time Factors EDAT- 2004/05/12 05:00 MHDA- 2004/07/20 05:00 CRDT- 2004/05/12 05:00 PHST- 2003/07/18 00:00 [received] PHST- 2003/09/23 00:00 [revised] PHST- 2003/09/30 00:00 [accepted] PHST- 2004/05/12 05:00 [pubmed] PHST- 2004/07/20 05:00 [medline] PHST- 2004/05/12 05:00 [entrez] AID - S0166432803003577 [pii] AID - 10.1016/j.bbr.2003.09.032 [doi] PST - ppublish SO - Behav Brain Res. 2004 Jun 4;152(1):129-35. doi: 10.1016/j.bbr.2003.09.032.