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2025年4月4日 星期五
农业生物技术学报  2021, Vol. 29 Issue (10): 1855-1868    DOI: 10.3969/j.issn.1674-7968.2021.10.001
  研究论文与报告 本期目录 | 过刊浏览 | 高级检索 |
转录因子OCT4在猪早期胚胎的表达模式及其在滋养层中的生物学功能
齐子成, 柴壮, 崔洪帝, 张宇霆, 刘龑, 伟人悦, 徐倩倩, 金君学, 刘忠华*
黑龙江省动物细胞与遗传工程重点实验室/东北农业大学 生命科学学院,哈尔滨 150030
Expression Pattern of Transcription Factor OCT4 in Early Porcine (Sus scrofa) Embryos and Its Biological Function in Trophectoderm
QI Zi-Cheng, CHAI Zhuang, CUI Hong-Di, ZHANG Yu-Ting, LIU Yan, WEI Ren-Yue, XU Qian-Qian, JIN Jun-Xue, LIU Zhong-Hua*
Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province/College of Life Science, Northeast Agricultural University, Harbin 150030, China
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摘要 八聚体结合转录因子4 (octamer-binding transcription factor 4, OCT4)属于POU (Pit-Oct-Unc)家族转录因子,在早期胚胎、胚胎干细胞及生殖细胞中特异性表达。研究OCT4在猪(Sus scrofa)早期胚胎发育中的表达规律和功能,对于解析早期发育机制和多能性调控具有重要意义。本研究通过免疫荧光和qPCR技术对OCT4在猪早期胚胎中的分布和表达模式进行检测。结果显示,在孤雌激活胚胎、体外受精胚胎和体细胞核移植胚胎中,OCT4蛋白在体外培养的胚胎2-细胞期到桑葚期的卵裂球中广泛表达,在囊胚期的内细胞团和滋养层同时表达;OCT4在孤雌激活胚胎和体外受精胚胎中的基因表达呈现相似模式,均在2-细胞期开始下降、在8-细胞期开始升高,在囊胚的滋养层中表达;在滋养层中特异性过表达OCT4,胚胎的细胞数和直径均显著增加,滋养层发育相关基因E74样因子5 (E74-like factor 5, ELF5)下调表达、EOMES (eomesodermin)显著上调表达,成纤维细胞生长因子(fibroblast growth factor, FGF)信号通路相关基因显著下调,极化基因PKCα (protein kinase Cα)和ERZIN显著下调,甲基化基因TET1显著上调、DNA甲基转移酶3B (DNA methyltransferases 3B, DNMT3b)显著下调。上述结果表明,OCT4在第一次谱系分化后的滋养层中持续表达,可能对滋养层增殖具有调控功能。本研究为深入探讨猪早期胚胎发育机制及猪胚胎干细胞的建立提供基础资料。
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作者相关文章
齐子成
柴壮
崔洪帝
张宇霆
刘龑
伟人悦
徐倩倩
金君学
刘忠华
关键词 八聚体结合转录因子4 (OCT4)表达模式早期胚胎滋养层    
Abstract:Octamer-binding transcription factor 4 (OCT4) is a POU (Pit-Oct-Unc)-family transcription factor, which is specifically expressed in early embryos, embryonic stem cells and germ cells. Studying the expression and function of OCT4 in early porcine (Sus scrofa) embryonic development is significant for the analysis of early developmental mechanisms and pluripotency regulation. In this study, the expression pattern of OCT4 in porcine early stage embryos was studied by immunofluorescence and qPCR technology. The results showed that in parthenogenetic, in vitro fertilization and somatic cell nuclear transfer embryos, OCT4 protein widely expressed in the blastomeres from 2-cell to murola, and expressed simultaneously in the inner cell mass and trophectoderm of the blastocyst; OCT4 expression patterns in parthenogenetic and in vitro fertilization embryos were similar, the expression level declined at the 2-cell stage and increased at the 8-cell stage, and Oct4 mRNA is widely expressed in the trophoectoderm of the blastocysts. When OCT4 was specifically overexpressed in the trophoectoderm, the diameter and cell number increased significantly, trophoblast development-related genes E74-like factor 5 (ELF5) was down-regulated, EOMES was significantly up-regulated, fibroblast growth factor (FGF) signaling pathway related genes were significantly down-regulated and polarization-related genes PKCα (protein kinase Cα) and ERZIN were significantly down-regulated, methylation gene TET1 was significantly up-regulated, and DNA methyltransferases 3B (DNMT3b) was significantly down-regulated. The results indicate that OCT4 keeps expressing in the trophectoderm and might regulate proliferation after the first lineage differentiation. This study provides basic material for further study of porcine early embryonic development mechanisms and the establishment of porcine embryonic stem cells.
Key wordsOctamer-binding transcription factor 4 (OCT4)    Expression pattern    Early stage embryo    Trophectoderm    Pig
收稿日期: 2021-03-04     
ZTFLH:  S814.6  
基金资助:国家自然科学基金(31872360); 十三五国家重点研发项目(2016YFA0100200)
通讯作者: * liuzhonghua@neau.edu.cn   
引用本文:   
齐子成, 柴壮, 崔洪帝, 张宇霆, 刘龑, 伟人悦, 徐倩倩, 金君学, 刘忠华. 转录因子OCT4在猪早期胚胎的表达模式及其在滋养层中的生物学功能[J]. 农业生物技术学报, 2021, 29(10): 1855-1868.
QI Zi-Cheng, CHAI Zhuang, CUI Hong-Di, ZHANG Yu-Ting, LIU Yan, WEI Ren-Yue, XU Qian-Qian, JIN Jun-Xue, LIU Zhong-Hua. Expression Pattern of Transcription Factor OCT4 in Early Porcine (Sus scrofa) Embryos and Its Biological Function in Trophectoderm. 农业生物技术学报, 2021, 29(10): 1855-1868.
链接本文:  
http://journal05.magtech.org.cn/Jwk_ny/CN/10.3969/j.issn.1674-7968.2021.10.001     或     http://journal05.magtech.org.cn/Jwk_ny/CN/Y2021/V29/I10/1855
 
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