PMID- 11932206 OWN - NLM STAT- MEDLINE DCOM- 20020517 LR - 20191025 IS - 0952-5041 (Print) IS - 0952-5041 (Linking) VI - 28 IP - 2 DP - 2002 Apr TI - Changes in ontogenetic expression of estrogen receptor alpha and not of estrogen receptor beta in the female rat reproductive tract. PG - 87-97 AB - To evaluate ontogenetic expression and localization of estrogen receptor (ER) alpha and beta in fetal female rat reproductive tract, competitive RT-PCR and immunohistochemistry were performed. Expression levels for Mullerian ERalpha, ERbeta1 and ERbeta2 mRNAs were determined by competitive RT-PCR. ERalpha expression on gestational day (GD) 15 x 5 increased 4 x 4-fold by GD 21 x 5, whereas both ERbeta1 and ERbeta2 gene expression were maintained at lower constant levels compared with ERalpha during development. ER immunolocalization was evaluated within three regions along the Mullerian duct axis; these were proximal, middle and caudal, which differentiate into oviduct, uterus and upper vagina respectively. Nuclear ERalpha was localized predominantly in proximal Mullerian epithelium, and middle and caudal Mullerian mesenchyme on GDs 15 x 5-21 x 5. Staining intensity for ERalpha increased with development in all regions. However, ERbeta immunoreactivity was not detected in any region during prenatal life after separate staining with three different polyclonal anti-rat ERbeta antibodies. These findings provide fundamental information critical for clarifying the species-specific physiological roles of ER subtypes during fetal development and for investigating the tissue-specific mechanisms underlying the prenatal response to estrogen and estrogen receptor agonists. FAU - Okada, A AU - Okada A AD - Safety Research Laboratories, Yamanouchi Pharmaceutical Co. Ltd, Itabashi, Tokyo 174-8511, Japan. FAU - Ohta, Y AU - Ohta Y FAU - Buchanan, D L AU - Buchanan DL FAU - Sato, T AU - Sato T FAU - Inoue, S AU - Inoue S FAU - Hiroi, H AU - Hiroi H FAU - Muramatsu, M AU - Muramatsu M FAU - Iguchi, T AU - Iguchi T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Mol Endocrinol JT - Journal of molecular endocrinology JID - 8902617 RN - 0 (Estrogen Receptor alpha) RN - 0 (Estrogen Receptor beta) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Estrogen) SB - IM MH - Animals MH - Estrogen Receptor alpha MH - Estrogen Receptor beta MH - Female MH - Fetus/*metabolism MH - *Gene Expression Regulation, Developmental MH - Immunohistochemistry MH - Male MH - Ovary/*metabolism MH - Pregnancy MH - RNA, Messenger/genetics/metabolism MH - Rats MH - Rats, Sprague-Dawley MH - Receptors, Estrogen/genetics/*metabolism MH - Reverse Transcriptase Polymerase Chain Reaction MH - Uterus/*metabolism EDAT- 2002/04/05 10:00 MHDA- 2002/05/23 10:01 CRDT- 2002/04/05 10:00 PHST- 2002/04/05 10:00 [pubmed] PHST- 2002/05/23 10:01 [medline] PHST- 2002/04/05 10:00 [entrez] AID - JME01064 [pii] AID - 10.1677/jme.0.0280087 [doi] PST - ppublish SO - J Mol Endocrinol. 2002 Apr;28(2):87-97. doi: 10.1677/jme.0.0280087.