Center for Animal Biotechnology and Genomics, Department of Animal Science, Texas A&M University, College Station, TX 77843-2471, USA.
Am J Reprod Immunol. 2010 Oct;64(4):255-64. doi: 10.1111/j.1600-0897.2010.00860.x. Epub 2010 May 26.
Endogenous retroviruses (ERVs) are present in the genome of all vertebrates and originated from infections of the germline of the host by exogenous retroviruses. ERVs have coevolved with their hosts for millions of years and are recognized to contribute to genome plasticity, protect the host against infection of related pathogenic and exogenous retroviruses, and play a vital role in development of the placenta. Consequently, some ERVs have been positively selected and maintained in the host genome throughout evolution. This review will focus on the critical role of ERVs in development of the mammalian placenta and specifically highlight the biological role of sheep JSRV-related endogenous betaretroviruses in conceptus (embryo and associated extraembryonic membranes) development.
内源性逆转录病毒 (ERVs) 存在于所有脊椎动物的基因组中,起源于宿主生殖细胞中外源逆转录病毒的感染。ERVs 与宿主共同进化了数百万年,被认为有助于基因组的可塑性,保护宿主免受相关致病性和外源性逆转录病毒的感染,并在胎盘发育中发挥重要作用。因此,一些 ERVs 在整个进化过程中被宿主基因组积极选择和保留。本综述将重点关注 ERVs 在哺乳动物胎盘发育中的关键作用,并特别强调绵羊 JSRV 相关内源性 betaretroviruses 在胚胎(胚胎和相关的胚胎外膜)发育中的生物学作用。