PMID- 9261821 OWN - NLM STAT- MEDLINE DCOM- 19980108 LR - 20190718 IS - 0959-4965 (Print) IS - 0959-4965 (Linking) VI - 8 IP - 11 DP - 1997 Jul 28 TI - Aromatase cytochrome P450 and 5 alpha-reductase in the amygdala and cortex of perinatal rats. PG - 2529-33 AB - The major androgen metabolizing enzymes, aromatase cytochrome P450 and 5 alpha-reductase play critical role(s) in the development of sexually dimorphic brain structures, the modulation of neuroendocrine function(s) and the regulation of sexual and non-sexual behaviors. Using established assays, we detected 5 alpha-reductase and aromatase enzymatic activities in amygdala and frontal cortical tissue from male and female rats during the perinatal interval (from gestational day (GD) 19 to postnatal day (PND) 6). The present findings indicate that 5 alpha-reductase and aromatase rates in the cortex display different enzyme profiles, while in the amygdala tissue site a similar pattern is seen for both enzymes during perinatal development. In general, there was a lack of sex differences in the enzymatic rates. The importance these enzyme systems play in generating androgen (and progesterone) steroid metabolites which influence neural development and function are discussed. FAU - Jacobson, N A AU - Jacobson NA AD - Department of Zoology, Brigham Young University, Provo, UT 84602, USA. FAU - Ladle, D R AU - Ladle DR FAU - Lephart, E D AU - Lephart ED LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - England TA - Neuroreport JT - Neuroreport JID - 9100935 RN - EC 1.14.14.1 (Aromatase) RN - EC 1.3.99.5 (3-Oxo-5-alpha-Steroid 4-Dehydrogenase) SB - IM MH - 3-Oxo-5-alpha-Steroid 4-Dehydrogenase/*biosynthesis MH - Aging/*metabolism MH - Amygdala/embryology/*enzymology/growth & development MH - Analysis of Variance MH - Animals MH - Animals, Newborn MH - Aromatase/*biosynthesis MH - Embryonic and Fetal Development MH - Female MH - Frontal Lobe/embryology/*enzymology/growth & development MH - *Gene Expression Regulation, Developmental MH - *Gene Expression Regulation, Enzymologic MH - Male MH - Pregnancy MH - Rats MH - Sex Characteristics EDAT- 1997/07/28 00:00 MHDA- 1997/07/28 00:01 CRDT- 1997/07/28 00:00 PHST- 1997/07/28 00:00 [pubmed] PHST- 1997/07/28 00:01 [medline] PHST- 1997/07/28 00:00 [entrez] AID - 10.1097/00001756-199707280-00022 [doi] PST - ppublish SO - Neuroreport. 1997 Jul 28;8(11):2529-33. doi: 10.1097/00001756-199707280-00022.