PMID- 8300755 OWN - NLM STAT- MEDLINE DCOM- 19940307 LR - 20201209 IS - 0730-2312 (Print) IS - 0730-2312 (Linking) VI - 53 IP - 4 DP - 1993 Dec TI - Immunohistochemical localization of the avian progesterone receptor and its candidate receptor binding factor (RBF-1). PG - 383-93 AB - An avian oviduct nuclear matrix protein in the 6-10 kDa size range has been implicated to function in the cell-free nuclear binding of the avian oviduct progesterone receptor (PR). This protein, termed the receptor binding factor-1 (RBF-1), has been purified and partially characterized [Schuchard et al.: Biochemistry 30:4535-4542, 1991]. This paper describes the immunohistochemical co-localization of the RBF-1 and PR in the avian oviduct cell nuclei and rat reproductive cell nuclei using antibodies directed specifically against the RBF-1 and activated PR. In the undifferentiated oviduct, the immunoreactivities for both PR and RBF-1 were co-localized in the nuclei of only epithelial cells, but not the stromal cells or smooth muscle cells. In the partially differentiated oviduct of estrogen treated chicks, the immunoreactivity co-localized in the nuclei of not only epithelial but also glandular and stromal cells. Staining for the PR, but not RBF-1, was detected in the smooth muscle cells. The intensity of the PR but not the RBF-1 staining was markedly down-regulated in these cells at 2 and 6 h after treatment of the animals with progesterone (P). However, the band patterns for RBF-1 in the Western blots did show qualitative changes which may reflect P-induced posttranslational modifications which alter the epitope on the RBF-1. Interestingly, immunohistochemical analysis of several reproductive tissues of the rat showed that certain cell types in the uterus, ovary, and prostate displayed strong positive nuclear staining for an RBF-1-like antigen(s).(ABSTRACT TRUNCATED AT 250 WORDS) FAU - Zhuang, Y H AU - Zhuang YH AD - Department of Biomedical Sciences, University of Tampere, Finland. FAU - Landers, J P AU - Landers JP FAU - Schuchard, M D AU - Schuchard MD FAU - Syvala, H AU - Syvala H FAU - Gosse, B AU - Gosse B FAU - Ruesink, T AU - Ruesink T FAU - Spelsberg, T C AU - Spelsberg TC FAU - Tuohimaa, P AU - Tuohimaa P LA - eng GR - HD 07108/HD/NICHD NIH HHS/United States GR - HD9140/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Cell Biochem JT - Journal of cellular biochemistry JID - 8205768 RN - 0 (Antibodies, Monoclonal) RN - 0 (Avian Proteins) RN - 0 (Carrier Proteins) RN - 0 (Chromatin) RN - 0 (DNA-Binding Proteins) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (RBF-1 protein, Gallus gallus) RN - 0 (Receptors, Progesterone) RN - 4TI98Z838E (Estradiol) RN - EC 1.- (Oxidoreductases) RN - EC 1.3.- (Oxidoreductases Acting on CH-CH Group Donors) RN - EC 1.3.1.38 (trans-2-enoyl-CoA reductase (NADPH)) SB - IM MH - Amino Acid Sequence MH - Animals MH - Antibodies, Monoclonal MH - *Avian Proteins MH - Blotting, Western MH - Carrier Proteins/*analysis MH - Cell Nucleus/chemistry MH - *Chickens MH - Chromatin/chemistry MH - DNA-Binding Proteins/*analysis MH - Epithelium/chemistry MH - Estradiol/pharmacology MH - Female MH - Immunohistochemistry MH - *Intracellular Signaling Peptides and Proteins MH - Molecular Sequence Data MH - Oviducts/*chemistry/ultrastructure MH - Oxidoreductases MH - Oxidoreductases Acting on CH-CH Group Donors MH - Rats MH - Receptors, Progesterone/*analysis EDAT- 1993/12/01 00:00 MHDA- 1993/12/01 00:01 CRDT- 1993/12/01 00:00 PHST- 1993/12/01 00:00 [pubmed] PHST- 1993/12/01 00:01 [medline] PHST- 1993/12/01 00:00 [entrez] AID - 10.1002/jcb.240530416 [doi] PST - ppublish SO - J Cell Biochem. 1993 Dec;53(4):383-93. doi: 10.1002/jcb.240530416.