Repertoire of porcine MicroRNAs in adult ovary and testis by deep sequencing

文献类型： 外文期刊

第一作者： Chen, Haosi

作者： Chen, Haosi;Wang, Xin;Gao, Xiaolian;Li, Mingzhou;Liu, Yingkai;Wang, Tao;Guan, Jiuqiang;Luo, Zonggang;Ma, Jideng;Mu, Zhiping;Jiang, An-an;Zhu, Li;Li, Xuewei;Chen, Lei;Wang, Jinyong;Lang, Qiulei;Zhou, Xiaochuan;Zeng, Wenxian;Li, Ning;Li, Kui

作者机构：

关键词： Deep sequencing;MiRNA;Ovary;Pig;Testis

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL SCIENCES （ 影响因子：6.58； 五年影响因子：6.478 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Background: MicroRNAs (miRNAs), a large family of short endogenous RNAs known to post-transcriptionally repress gene expression, participate in the regulation of almost every cellular process. Changes in miRNA expression are associated with many pathologies. Ovarian folliculogenesis and testicular spermatogenesis are complex and coordinated bio-logical processes, in which tightly regulated expression and interaction of a multitude of genes could be regulated by these miRNAs. Identification and preliminary characterization of gonad-specific miRNAs would be a prerequisite for a thorough understanding of the role that miRNA-mediated posttranscriptional gene regulation plays in mammalian reproduction. Method: Here, we present the identification of a repertoire of porcine miRNAs in adult ovary and testis using deep sequencing technology. A bioinformatics pipeline was developed to distinguish authentic mature miRNA sequences from other classes of small RNAs repre-sented in the sequencing data. Results: Using this approach, we detected 582 precursor hairpins (pre-miRNAs) encoding for 732 mature miRNAs, of which 673 are unique. Statistically, 224 unique miRNAs (out of 673, 33.28%) were identified which had significant differential expression (DE) between ovary and testis libraries (P < 0.001). Most of DE miRNAs located on the X chromosome (X-linked miRNAs) (24 out of 34, 70.59%) significantly up-regulated in ovary versus testis (P < 0.001). Predictably, X-linked miRNAs are expressed in a testis-preferential or testis-specific pattern. To explore the potential for co-expression among genomic location clusters of X-linked miRNAs, we surveyed the relationship between the distance separating miRNA loci and the coordinate expression patterns of 32 high confidence X-linked miRNAs in seven normal pig tissues using the real-time quantitative PCR (q-PCR) approach. Our results show that proximal pairs of miRNAs are generally co-expressed implying that miRNAs within 50 kb of genomic bases are typically derived from a common transcript. Conclusions: The present study characterizes the miRNA transcriptome of adult porcine gonads, with an emphasis on the co-expression patterns of X-linked miRNAs. Our report should facilitate studies of the organ-specific reproductive roles of miRNAs.

分类号： Q

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