Obstetrics and Gynecology Commons^™

Bovine Oviductal And Embryonic Insulin-Like Growth Factor Binding Proteins: Possible Regulators Of "Embryotrophic" Insulin-Like Growth Factor Circuits., Q A Winger, P De Los Rios, V K Han, D T Armstrong, D J Hill, A J Watson

Obstetrics & Gynaecology Publications

Bovine oviductal monolayer and vesicle primary cultures express insulin-like growth factor (IGF)-I and -II mRNAs and polypeptides. Early bovine embryos also express IGF-I, IGF-II, IGF-I receptor, IGF-II receptor, and insulin receptor mRNAs. This study reports the expression of IGF binding protein (IGFBP) mRNAs and polypeptides in bovine oviduct primary cultures and IGFBP mRNAs in preattachment embryos. Release of immunoreactive IGF-I and IGF-II by oviduct cultures and bovine blastocysts was also determined. IGFBP-2, -3, -4, and -5 transcripts were observed in oviduct primary cultures throughout an 8-day interval. IGFBP-1 and -6 mRNAs were consistently not detected in the oviduct. Messenger RNAs …