ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (10): 1882-1891.doi: 10.11843/j.issn.0366-6964.2017.10.011

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Preliminary Studies on Tissue Expression Profiles of Smad 4 mRNA and Its miRNAs in Yak

WANG Yu-heng1, XU Ye-fen1*, NIU Jia-qiang1, WANG Hong-hui1, SUOLANG Si-zhu1, QIANGBA Yang-zong1, ZHANG De-cheng1, GUO Min2, CHENG Ling-hua2   

  1. 1. Department of Animal Science, Xizang Agriculture and Animal Husbandry College, Linzhi 860000, China;
    2. College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
  • Received:2017-03-20 Online:2017-10-23 Published:2017-10-23

Abstract:

The aim of this study was to investigate the mRNA expression profile of Smad 4 gene and to explore the possible miRNAs that target to Smad 4 gene in yak. The reverse transcription PCR(RT-PCR) was used to detect the expression of Smad 4 gene mRNA in the 12 yak tissues including hypothalamus,pituitary,liver,heart,spleen,lung,kidney,biceps femoris,lymph nodes,ovary,oviduct and uterus.The possible miRNAs that target to Smad 4 gene were predicted by TargentScan and miRBase softwares, and their tissue expression profiles in yak were also analyzed by RT-PCR. The results showed that Smad 4 mRNA was expressed in the 12 yak tissues, especially widely expressed in the ovary, oviduct and uterus of the reproductive system. It was predicted that there were 20 miRNAs that could target to the Smad 4 gene of yak, and 6 were selected for expression analysis. The results indicated that bta-miR-106a and bta-miR-377 were expressed in the 12 detected tissues, and bta-miR-146a, bta-miR-224 and bta-miR-1434-5p were expressed in other tissues except for the oviduct of yak, whereas bta-miR-212 was expressed only in the ovaries. The results suggest that Smad 4 gene may play important roles in the various tissues of yak, and bta-miR-212 may be a miRNA targeting to Smad 4 gene only in the ovary of yak, which possibly participates in reproductive physiological process in yak, needing further studies to clarify the mechanism.

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