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Potential roles of the poly(A)-binding proteins in translational regulation during spermatogenesis

机译:poly(A)结合蛋白在精子发生过程中在翻译调控中的潜在作用

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Spermatogenesis is briefly defined as the production of mature spermatozoa from spermatogonial stem cells at the end of a strictly regulated process. It is well known that, to a large extent, transcriptional activity ceases at mid-spermiogenesis. Several mRNAs transcribed during early stages of spermatogenesis are stored as ribonucleoproteins (RNPs). During the later stages, translational control of these mRNAs is mainly carried out in a time dependent-manner by poly(A)-binding proteins (PABPs) in cooperation with other RNA-binding proteins and translation-related factors. Conserved PABPs specifically bind to poly(A) tails at the 3′ ends of mRNAs to regulate their translational activity in spermatogenic cells. Studies in this field have revealed that PABPs, particularly poly(A)-binding protein cytoplasmic 1 (Pabpc1), Pabpc2, and the embryonic poly(A)-binding protein (Epab), play roles in the translational regulation of mRNAs required at later stages of spermatogenesis. In this review article, we evaluated the spatial and temporal expression patterns and potential functions of these PABPs in spermatogenic cells during spermatogenesis. The probable relationship between alterations in PABP expression and the development of male infertility is also reviewed.
机译:精子发生被简单地定义为在严格调节的过程结束时从精原干细胞产生成熟的精子。众所周知,在很大程度上,转录活性在精子发生中期停止。在精子发生的早期阶段转录的几个mRNA被存储为核糖核蛋白(RNP)。在后期阶段,这些mRNA的翻译控制主要是通过时间依赖的方式,由poly(A)结合蛋白(PABP)与其他RNA结合蛋白和翻译相关因子共同完成的。保守的PABPs与mRNAs 3'末端的poly(A)尾巴特异性结合,以调节其在生精细胞中的翻译活性。该领域的研究表明,PABPs,尤其是poly(A)结合蛋白胞质1(Pabpc1),Pabpc2和胚胎poly(A)结合蛋白(Epab),在后来对mRNA的翻译调控中发挥作用精子发生的各个阶段。在这篇综述文章中,我们评估了生精过程中这些PABP在生精细胞中的时空表达模式和潜在功能。还审查了PABP表达的改变与男性不育发展之间的可能关系。

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