China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (10): 3289-3296.doi: 10.16431/j.cnki.1671-7236.2020.10.028

• Genetics and Breeding • Previous Articles     Next Articles

Effect of GDF9 on Sheep Cumulus Cell Proliferation

ZHAO Xi1, NURIBIYAMU·Maimaitituoheti1, SONG Yukun1, AIRIXIATI·Dilixiati1, ZHANG Bo2, AERMAN·Haire1, ABULIZI·Wusiman1   

  1. 1. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China;
    2. Chengdu Xinan Gynecology Hospital, Chengdu 610023, China
  • Received:2020-03-26 Online:2020-10-20 Published:2020-10-17

Abstract: The purpose of this study was to investigate the effect of growth differentiation factor 9 (GDF9) on the gene expression of cumulus cells expansion and hormone receptors as well as hormone secretion,in order to provide evidence for the role of GDF9 in the development of sheep cumulus cells.Sheep cumulus cells were used as the research object in this study,and were cultured for 48 h by adding different concentrations (0,50,100,200,400 ng/mL) GDF9 to low serum cell culture medium.Total RNA were extracted from the cells,using β-actin as the reference gene,Real-time quantitative PCR technology were used to detect the cumulus cells expansion related genes hyaluronic acid synthase gene 2 (HAS2),prostaglandin lead oxide synthase 2 (PTGS2),pentraxin 3 (PTX3) and hormone receptor genes follicle-stimulating hormone receptor (FSHR),luteinizing hormone receptor (LHR) and estrogen receptors (E2R).Using the enzyme-linked immunosorbent assay (ELISA) method to test the content of E2 and P4.The results showed that HAS2,PTX3,FSHR,E2R and LHR mRNA relative expression of 200 ng/mL GDF9 group was extremely significantly higher than the control group and other GDF9 groups (P<0.01),PTGS2 mRNA relative expression was extremely significantly higher than the control group and 50,400 ng/mL GDF9 groups (P<0.01),and significantly higher than 100 ng/mL GDF9 group (P<0.05).When added 400 ng/mL GDF9,the relative mRNA expression of all the mentioned-above genes were all extremely significantly lower than that of the 200 ng/mL GDF9 group.Moreover,the E2 secretion level was extremely significantly higher than that of the control group and 50 ng/mL GDF9 group (P<0.01),significantly higher than that of the 100 ng/mL GDF9 group(P<0.05),while had no significant difference from the 200 ng/mL GDF9 group (P>0.05).When added 100,200 and 400 ng/mL GDF9,the concentration of P4 was significantly higher than the control group (P<0.05),and there was no significant difference from the 50 ng/mL group (P>0.05),and there was no significant difference between 100,200 and 400 ng/mL GDF9 groups (P>0.05).To sum up,GDF9 could promote the expansion of sheep cumulus cells and participated in the regulation of hormone secretion of sheep cumulus cells.

Key words: sheep; growth differentiation factor 9 (GDF9); cumulus cells; relative gene expression; hormone secretion

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