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Differential gene expression of bone morphogenetic protein 15 and growth differentiation factor 9 during in vitro maturation of porcine oocytes and early embryos


Differential gene expression of bone morphogenetic protein 15 and growth differentiation factor 9 during in vitro maturation of porcine oocytes and early embryos



Animal Reproduction Science 103(3-4): 312-322



ISSN/ISBN: 0378-4320

PMID: 17222994

DOI: 10.1016/j.anireprosci.2006.12.017

Bone morphogenetic protein 15 (BMP15) and growth differentiation factor 9 (GDF9) belong to the TGF-beta superfamily and are involved in the regulation of folliculogenesis. Though there are many reports concerning the expression and regulation of GDF9 in the process of oocyte maturation, expression of BMP15 during oocyte maturation is still not clearly understood. It has been reported that BMP15 and GDF9 expression is important in folliculogeneiss and that the regulation of these two proteins is complex and species-specific. In this report, we investigated the expression of BMP15 and GDF9 genes during in vitro maturation (IVM) at 0, 6, 12, 18, 24, 30, 36, 42 and 48 h for porcine oocytes. Porcine GDF9 gene was found to be highly expressed in immature oocytes and declined slowly during the oocyte maturation process. BMP15mRNA and its encoded protein were expressed at low levels in immature oocytes and increased to the highest level at 18 h of IVM, which coincides with the time of cumulus cell expansion. Thus, these two genes were differentially expressed during the oocyte maturation process and BMP15 is specifically expressed during cumulus cell expansion in porcine oocytes.

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Accession: 018739128

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