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Identification and comparison of microRNAs in pituitary gland during prenatal and postnatal stages of sheep by deep sequencing

机译:通过深度测序鉴定和比较绵羊产前和产后垂体中的microRNA

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MicroRNAs (miRNAs) are a class of short-chain RNA molecules of a??22 nucleotides in length and regulate gene expression at posttranscriptional levels by interacting with mRNAs. Although many miRNAs have been identified, the expression and function of miRNAs in the pituitary gland of sheep are still unclear. In this study, the identity and abundance of miRNAs were determined in the sheep pituitary gland of prenatal and postnatal stages. We showed that 107 miRNAs are significantly (P0.05) differentially expressed in pituitary glands between the prenatal and postnatal stages, and 44 new miRNA candidates were found according to a series of filtration criteria. Reverse-transcription polymerase chain reaction (RT-PCR) and DNA sequencing analysis confirmed the presence of several miRNAs. Real-time RT-PCR analysis showed that sheep miRNAs were expressed in prenatal and postnatal pituitary glands. We found that miRNAs were involved in hormone synthesis, secretion and signalling pathway regulationby gene ontology (GO) and KEGG concentration analysis. Our study provides valuable resources for comprehensive investigation of miRNAs in the pituitary gland and biology of sheep.
机译:微小RNA(miRNA)是一类长度为α2 22个核苷酸的短链RNA分子,其通过与mRNA相互作用而在转录后水平上调节基因表达。尽管已鉴定出许多miRNA,但在绵羊垂体中miRNA的表达和功能仍不清楚。在这项研究中,在产前和产后阶段的绵羊垂体腺中确定了miRNA的身份和数量。我们显示,在出生前和出生后阶段之间,垂体腺中107种miRNA的表达显着(P <0.05)差异,并且根据一系列过滤标准发现了44种新的miRNA候选物。逆转录聚合酶链反应(RT-PCR)和DNA测序分析证实了几种miRNA的存在。实时RT-PCR分析表明,绵羊miRNA在产前和产后垂体腺中表达。我们发现,miRNA通过基因本体论(GO)和KEGG浓度分析参与了激素的合成,分泌和信号通路的调控。我们的研究为垂体腺和绵羊生物学的miRNA的全面研究提供了宝贵的资源。

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