畜牧兽医学报 ›› 2020, Vol. 51 ›› Issue (11): 2699-2709.doi: 10.11843/j.issn.0366-6964.2020.11.009

• 生物技术与繁殖 • 上一篇    下一篇

TGFβ2和PPP3CA基因在黔北麻羊性腺轴组织表达及对卵巢颗粒细胞的调控研究

敖叶1,2, 陈祥1,2*, 周志楠1,2, 骆金红3, 韦仕南1,2, 张艳1,2, 惠茂茂1,2, 吴雨1,2, 杨沛方1,2   

  1. 1. 贵州大学 高原山地动物遗传育种与繁殖教育部重点实验室, 贵州省动物遗传育种与繁殖重点实验室, 贵阳 550025;
    2. 贵州大学动物科学学院, 贵阳 550025;
    3. 贵州省草业研究所, 贵阳 550006
  • 收稿日期:2020-05-06 出版日期:2020-11-25 发布日期:2020-11-20
  • 通讯作者: 陈祥,主要从事动物繁殖生物技术研究,E-mail:xchen2@gzu.edu.cn
  • 作者简介:敖叶(1992-),男,土家族,贵州铜仁人,硕士生,主要从事动物繁殖与生物技术研究,E-mail:516097146@qq.com
  • 基金资助:
    国家自然科学基金(31760652);国家重点研发计划项目(2017YFD0501900);贵州省优秀青年科技人才项目([2017]5624)

Expression of TGFβ2 and PPP3CA Genes in Gonadal Axis of Qianbei Ma Goat and Their Regulation on Ovarian Granulosa Cells

AO Ye1,2, CHEN Xiang1,2*, ZHOU Zhinan1,2, LUO Jinhong3, WEI Shinan1,2, ZHANG Yan1,2, HUI Maomao1,2, WU Yu1,2, YANG Peifang1,2   

  1. 1. Guizhou Key Laboratory of Animal Genetics, Breeding and Reproduction, Key Laboratory of Plateau Mountain Animal Genetics, Breeding and Reproduction of Ministry of Education, Guizhou University, Guiyang 550025, China;
    2. College of Animal Science, Guizhou University, Guiyang 550025, China;
    3. Guizhou Province Grass Industry Research Institute, Guiyang 550006, China
  • Received:2020-05-06 Online:2020-11-25 Published:2020-11-20

摘要: 旨在对转录组测序中单羔组对多羔组TGFβ2和PPP3CA基因的上、下调结果进行验证,并探究黔北麻羊TGFβ2和PPP3CA基因对卵巢颗粒细胞的调控机制。本研究以单、多羔黔北麻羊母羊为试验对象。通过RT-qPCR技术检测TGFβ2与PPP3CA基因在单、多羔黔北麻羊性腺轴中的表达水平;构建目的基因真核表达载体。培养黔北麻羊卵巢颗粒细胞,并利用脂质体转染法将pEGFP-N3-TGFβ2、pEGFP-N3-PPP3CA重组质粒导入卵巢颗粒细胞,检测培养基中雌二醇(E2)、孕酮(P4)的浓度。利用CCK-8和Annexin V-FITC法检测TGFβ2、PPP3CA基因对卵巢颗粒细胞增殖、凋亡的影响。随后,利用RT-qPCR从细胞水平检测超表达TGFβ2、PPP3CA基因对TGFβ2、PPP3CA、GnRHRFSHRBMP4、TIMP3基因表达的影响。RT-qPCR结果表明,TGFβ2与PPP3CA基因在被检测的组织中均有表达,且在单羔组中的表达量普遍高于多羔组;免疫荧光法证实,所培养的细胞为黔北麻羊卵巢颗粒细胞;TGFβ2与PPP3CA基因真核表达质粒导入细胞后,在极显著提高TGFβ2与PPP3CA基因表达的同时,能够极显著地抑制卵巢颗粒细胞中FSHRGnRHRBMP4、TIMP3基因的表达(P<0.01)。细胞增殖与凋亡结果显示,TGFβ2与PPP3CA基因能够促进颗粒细胞凋亡,抑制其增殖。酶联免疫吸附试验结果表明,TGFβ2与PPP3CA基因能够显著促进E2的分泌,但对P4的分泌无显著影响。本研究成功构建了TGFβ2、PPP3CA基因真核表达载体,荧光定量结果表明,超表达TGFβ2、PPP3CA基因抑制了繁殖相关基因的表达,提示TGFβ2、PPP3CA基因对山羊繁殖相关基因表达有一定的影响。为进一步研究TGFβ2、PPP3CA基因对黔北麻羊繁殖力的影响提供基础数据。

关键词: 黔北麻羊, TGFβ2基因, PPP3CA基因, 卵巢颗粒细胞, 差异表达

Abstract: The aim of this study was to verify the up-regulation and down-regulation of TGFβ2 and PPP3CA genes in transcriptome sequencing in monotocous group compared to polytocous group, and to explore the regulatory mechanism of TGFβ2 and PPP3CA genes on ovarian granulosa cells of Qianbei Ma goat. The monotocous and polytocous Qianbei Ma goat ewes were used as the research object. The expression levels of TGFβ2 and PPP3CA genes in the gonadal axis of monotocous and polytocous Qianbei Ma goat were detected by RT-qPCR technology; The eukaryotic expression vector of target genes were constructed. Qianbei Ma goat ovarian granular cells were cultured, the pEGFP-N3-TGFβ2 and pEGFP-N3-PPP3CA recombinant plasmids were transfected into ovarian granular cells by liposome transfection method, and the concentrations of estradiol(E2) and progesterone(P4) in the medium were detected. The effects of TGFβ2 and PPP3CA genes on the proliferation and apoptosis of ovarian granulosa cells were detected using CCK-8 and Annexin V-FITC methods. Then RT-qPCR was used to detect the effect of overexpressing TGFβ2, PPP3CA genes on TGFβ2, PPP3CA, GnRHR, FSHR, BMP4, TIMP3 genes expression at the cell level. RT-qPCR results showed that TGFβ2 and PPP3CA genes were expressed in the tested tissues, and the expression levels in the monotocous group were generally higher than those in the polytocous group; Immunofluorescence result confirmed that the cultured cells were Qianbei Ma goat ovarian granulosa cells; After the eukaryotic expression plasmids of TGFβ2 and PPP3CA genes were transfected into ovarian granulosa cells, the expressions of TGFβ2 and PPP3CA genes significantly increased while the expressions of FSHR, GnRHR, BMP4, TIMP3 genes were significantly inhibited in ovarian granulosa cells (P<0.01). The results of cell proliferation and apoptosis showed that TGFβ2 and PPP3CA genes could promote the apoptosis of granulosa cells and inhibit their proliferation. The result of enzyme-linked immunosorbent assay showed that TGFβ2 and PPP3CA genes could significantly promote the secretion of E2, but had no significant effect on the secretion of P4. The eukaryotic expression vector of TGFβ2 and PPP3CA genes were successfully constructed in this study. Fluorescence quantitative results showed that overexpression of TGFβ2 and PPP3CA genes inhibited the expression of reproduction-related genes, suggesting that TGFβ2 and PPP3CA genes had a certain effect on goat reproduction-related genes expression. These results will provide basic data for further research on the influence of TGFβ2 and PPP3CA genes on the fecundity of Qianbei Ma goat.

Key words: Qianbei Ma goats, TGFβ2 gene, PPP3CA gene, ovarian granulosa cells, differential expression

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