畜牧兽医学报 ›› 2019, Vol. 50 ›› Issue (5): 957-971.doi: 10.11843/j.issn.0366-6964.2019.05.007

• 遗传育种 • 上一篇    下一篇

牦牛不同年龄肌肉组织microRNA表达谱及生物信息学分析

纪会1, 王会1, 柴志欣1, 王吉坤1, 王嘉博1, 罗晓林2, 姬秋梅3, 信金伟3, 钟金城1*   

  1. 1. 西南民族大学 青藏高原动物遗传资源保护与利用教育部重点实验室, 成都 610041;
    2. 四川省草原科学研究院, 成都 611731;
    3. 西藏自治区农牧科学院 省部共建青稞和牦牛种质资源与遗传改良国家重点实验室, 拉萨 850009
  • 收稿日期:2018-11-05 出版日期:2019-05-23 发布日期:2019-05-23
  • 通讯作者: 钟金城,主要从事动物遗传育种与繁殖研究,E-mail:zhongjincheng518@126.com
  • 作者简介:纪会(1995-),女,哈尼族,云南景东人,硕士生,主要从事动物遗传学研究,E-mail:1328051168@qq.com
  • 基金资助:

    西南民族大学研究生创新型科研项目(CX2018SZ113);国家肉牛牦牛产业技术体系项目(CARS-37)

Differential Expression Profile and Bioinformatics Analysis of miRNAs in Yak Muscle Tissue during Development

JI Hui1, WANG Hui1, CHAI Zhixin1, WANG Jikun1, WANG Jiabo1, LUO Xiaolin2, JI Qiumei3, XIN Jinwei3, ZHONG Jincheng1*   

  1. 1. Key Laboratory of the Qinghai-Tibet Plateau Animal Genetic Resources Protection and Utilization of the Ministry of Education, Southwest Minzu University, Chengdu 610041, China;
    2. Sichuan Academy of Grassland Sciences, Chengdu 611731, China;
    3. State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850009, China
  • Received:2018-11-05 Online:2019-05-23 Published:2019-05-23

摘要:

旨在挖掘牦牛不同年龄肌肉组织中miRNA表达谱,分析其生物学特征,以探索其在牦牛肌肉发育过程中的调节模式。本研究构建0.5、2.5、4.5和7.5岁肌肉组织的4个小RNA文库,利用Solexa技术进行测序,用生物信息学方法和RT-qPCR技术对测序结果进行分析和验证。结果,获得各miRNAs分别在4个年龄段肌肉组织中的表达量,在7.5岁肌肉组织中发现58个共同与0.5、2.5、4.5岁差异表达的miRNAs,其中53个miRNAs在7.5岁肌肉组织中显著下调,5个显著上调。运用R语言进行GO富集和KEGG信号通路分析,58个miRNAs可能通过PI3K-Akt、MAPK、Ras和肌动蛋白细胞骨架调节通路(regulation of actin cytoskeleton)参与调节牦牛肌肉细胞的增殖与分化,且PI3K-Akt、MAPK、Ras 3个信号通路共同靶向53个靶基因,说明3个信号通路相互关联。随机选择8个miRNAs进行RT-qPCR验证,结果表明其中7个miRNAs的表达趋势与测序结果一致。结果表明,牦牛肌肉发育可能受到多种miRNA的调控并涉及多个信号通路,有助于构建肌肉组织中miRNA的调控网络,为进一步研究miRNA调控哺乳动物肌肉发育奠定了理论基础。

Abstract:

The aim of this study was to explore the the miRNA expression profile in muscle tissues at different ages of yak and analyze their biological characteristics to explore their regulation patterns during yak muscle development. Four small RNA libraries of muscle tissues during 0.5-year-old, 2.5-year-old, 4.5-year-old and 7.5-year-old of yak were constructed and sequenced using Solexa technology. The sequencing results were verified and analyzed by RT-qPCR and bioinformatics methods. The expression profile of each miRNA in 4 age groups were obtained. Fifty eight miRNAs were differentially expressed in muscle tissues during the 7.5-year-old of yak compared with other 3 age groups, of which 53 miRNAs were significantly down-regulated and 5 were significantly up-regulated in 7.5-year-old muscle tissue. GO enrichment and KEGG analysis were performed using R language, 58 miRNAs might be involved in the regulation of proliferation and differentiation of yak muscle cells through PI3K-Akt,MAPK, Ras and the regulation of actin cytoskeleton signaling pathways. PI3K-Akt, MAPK and Ras signaling pathways jointly targeted 53 target genes, which indicated that the 3 signaling pathways were related to each other. Furthermore, the RT-qPCR results showed that the expression tendency of 7 of the 8 randomly selected miRNAs were consistent with the sequencing results. The results indicate that yak muscle development may be regulated by multiple miRNAs and involve in multiple signaling pathways, which may help to construct the regulatory network of miRNAs in muscle tissue, which lays a theoretical foundation for further study the miRNA regulating the mammalian muscle development.

中图分类号: