Regulation of protein tyrosine phosphatase 4a1, B-cell translocation gene 2, nuclear receptor subfamily 4a1 and diacylglycerol O-acyltransferase 1 by follicle stimulating hormone in the rat ovary.
Ovarian response to follicle stimulating hormone (FSH) and luteinising hormone (LH) leads to the formation of a mature follicle that is eventually ovulated. FSH and LH are essential for this process because they direct changes in somatic cells associated with folliculogenesis by regulating the expression of multiple genes. We hypothesised that genes induced by FSH in rat Sertoli cells would also show hormonal regulation during rat folliculogenesis. The objective of this study was to determine the expression patterns of diacylglycerol O-acyltransferase 1 (Dgat1), nuclear receptor subfamily 4a1 (Nr4a1), an anti-proliferative gene (Btg2) and a protein tyrosine phosphatase (Ptp4a1) in the ovaries of pregnant mare serum gonadotrophin (PMSG)-treated and human chorionic gonadotrophin (hCG)-treated rats. Expression of Dgat1, Nr4a1 and Ptp4a1 was induced in ovaries 4 h post PMSG treatment. When rats were treated with hCG, Dgat1, Nr4a1 and Ptp4a1 expression was induced by 12 h. Expression of Nr4a1 protein increases 12-24 h after induction of gene expression. Nr4a1 protein was observed in the granulosa, theca and luteal cells post PMSG and hCG treatment. These findings should increase our knowledge of mechanisms regulating folliculogenesis and luteinisation and demonstrate the diverse proteins that are important in ovarian function.
Schmidt
Jonathan
J
Department of Animal Sciences and Center for Reproductive Biology, Washington State University, Pullman, WA 99164, USA.
de Avila
Jeanene
J
McLean
Derek
D
D000818:Animals; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D051048:Diacylglycerol O-Acyltransferase / Q000235:genetics / Q000378:metabolism*; D005260:Female; D005640:Follicle Stimulating Hormone / Q000378:metabolism*; D005786:Gene Expression Regulation; D017874:Immediate-Early Proteins / Q000235:genetics / Q000378:metabolism*; D007150:Immunohistochemistry; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D057105:Nuclear Receptor Subfamily 4, Group A, Member 1; D010053:Ovary / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism*; D017027:Protein Tyrosine Phosphatases / Q000235:genetics / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D018160:Receptors, Cytoplasmic and Nuclear / Q000235:genetics / Q000378:metabolism*; D011987:Receptors, Steroid / Q000235:genetics / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*
C489553:Btg1 protein, rat; D004268:DNA-Binding Proteins; D017874:Immediate-Early Proteins; C539821:NR4A1 protein, human; D009363:Neoplasm Proteins; C539820:Nr4a1 protein, rat; D057105:Nuclear Receptor Subfamily 4, Group A, Member 1; D018160:Receptors, Cytoplasmic and Nuclear; D011987:Receptors, Steroid; D014157:Transcription Factors; D005640:Follicle Stimulating Hormone; D051048:Diacylglycerol O-Acyltransferase; D017027:Protein Tyrosine Phosphatases; C490199:Ptp4a1 protein, rat