Endogenous Retroviruses Function as Gene Expression Regulatory Elements During Mammalian Pre-implantation Embryo Development
文献类型： 外文期刊
作者： Fu, Bo 1 ; Ma, Hong 1 ; Liu, Di 1 ;
作者机构： 1.HeiLongJiang Acad Agr Sci, Inst Anim Husb Res, Harbin 150086, Heilongjiang, Peoples R China
2.Minist Agr Peoples Republ China, Key Lab Combine Planting & Feeding, Harbin 150086, Heilongjiang, Peoples R China
关键词： pre-implantation embryo; endogenous retroviruses; zygotic genome activation; epigenetic reprogramming; somatic cell nuclear transfer
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）
ISSN： 1422-0067
年卷期： 2019 年 20 卷 3 期
页码：
收录情况： SCI
摘要： Pre-implantation embryo development encompasses several key developmental events, especially the activation of zygotic genome activation (ZGA)-related genes. Endogenous retroviruses (ERVs), which are regarded as deleterious genomic parasites, were previously considered to be junk DNA. However, it is now known that ERVs, with limited conservatism across species, mediate conserved developmental processes (e.g., ZGA). Transcriptional activation of ERVs occurs during the transition from maternal control to zygotic genome control, signifying ZGA. ERVs are versatile participants in rewiring gene expression networks during epigenetic reprogramming. Particularly, a subtle balance exists between ERV activation and ERV repression in host-virus interplay, which leads to stage-specific ERV expression during pre-implantation embryo development. A large portion of somatic cell nuclear transfer (SCNT) embryos display developmental arrest and ZGA failure during pre-implantation embryo development. Furthermore, because of the close relationship between ERV activation and ZGA, exploring the regulatory mechanism underlying ERV activation may also shed more light on the enigma of SCNT embryo development in model animals.
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