PMID- 8413831 OWN - NLM STAT- MEDLINE DCOM- 19931117 LR - 20180214 IS - 0028-3835 (Print) IS - 0028-3835 (Linking) VI - 57 IP - 5 DP - 1993 May TI - Serotonin, catecholamines and metabolites in discrete brain areas in relation to lordotic responding on proestrus. PG - 946-54 AB - Levels of serotonin (5-HT) and metabolite, 5-hydroxyindole-acetic acid (5-HIAA), dopamine and metabolites, dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA), and norepinephrine (NE) were measured in microdissected brain areas at 14.30 and 19.30 h on diestrus and proestrus in rats. Lordosis, sexual behavior, was exhibited only by proestrous females at 19.30 h. The content of monoamines and/or metabolites changed from afternoon to early evening of diestrus in a number of brain regions. On proestrus, during the time when females became sexually receptive, additional changes appeared and many diestrous changes were reversed or amplified. Proestrus-specific changes were found in areas providing the descending circuit for regulation of lordosis, the medial preoptic nucleus (mPOA), ventromedial nucleus of the hypothalamus (VMN) and midbrain central gray (MCG), and in areas outside of endocrine control centers such as parietal cortex (Ctx) and dorsal raphe nucleus (DR). Thus, these data are consistent with previous studies showing functional changes in monoaminergic transmitters during the day/night cycle and during hormonal induction of neuroendocrine events. NE levels increased between 14.30 and 19.30 h on proestrus in most brain areas, ranging from 20% increases in mPOA and Ctx to a 220% increase in the DR. NE levels decreased on proestrus in the VMN. The direction of proestrous changes in NE were reversed in some, but not all of the areas, between the afternoon and evening of diestrus. Dopamine was detectable in all areas sampled, and the metabolites HVA and DOPAC were detectable in some but not all areas.(ABSTRACT TRUNCATED AT 250 WORDS) FAU - Luine, V N AU - Luine VN AD - Department of Psychology, Hunter College of CUNY, New York 10021. LA - eng GR - HD 12011/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Switzerland TA - Neuroendocrinology JT - Neuroendocrinology JID - 0035665 RN - 0 (Catecholamines) RN - 333DO1RDJY (Serotonin) SB - IM MH - Animals MH - Brain/*metabolism MH - Catecholamines/*metabolism MH - Female MH - Periaqueductal Gray/metabolism MH - Preoptic Area/metabolism MH - *Proestrus MH - Rats MH - Rats, Sprague-Dawley MH - Serotonin/*metabolism MH - Sexual Behavior, Animal/*physiology MH - Tissue Distribution MH - Ventromedial Hypothalamic Nucleus/metabolism EDAT- 1993/05/01 00:00 MHDA- 1993/05/01 00:01 CRDT- 1993/05/01 00:00 PHST- 1993/05/01 00:00 [pubmed] PHST- 1993/05/01 00:01 [medline] PHST- 1993/05/01 00:00 [entrez] AID - 10.1159/000126458 [doi] PST - ppublish SO - Neuroendocrinology. 1993 May;57(5):946-54. doi: 10.1159/000126458.