ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (8): 1576-1586.doi: 10.11843/j.issn.0366-6964.2019.08.006

• ANIMAL GENETICS AND BREEDING • Previous Articles     Next Articles

Preliminary Study on Tissue Expression Profile and Related miRNAs of Yak Nramp1 Gene

WEN Dongxu1,2, ZHANG Lei1, SUOLANG Sizhu1,2, NIU Jiaqiang1,2, WANG Yuheng3, GONG Ga1,2, DANBA Ciren1, XI Guangyin4, GUO Min4, XU Yefen1,2*   

  1. 1. Department of Animal Science, Tibet Agriculture & Animal Husbandry University, Linzhi 860000, China;
    2. Provincial Key Laboratory of Tibet Plateau Animal Epidemic Disease Research, Tibet Agriculture & Animal Husbandry University, Linzhi 860000, China;
    3. Tibet Veterinary Biological Pharmaceutical Factory, Lhasa 850000, China;
    4. College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
  • Received:2019-01-27 Online:2019-08-23 Published:2019-08-23

Abstract: The aim of this study was to investigate the tissue expression profiles of yak Nramp1 gene mRNA and the possible miRNAs targeting to Nramp1. The mRNA expression profile of yak Nramp1 gene was analyzed by RT-PCR, and the possible miRNAs targeting to Nramp1 were predicted by TargentScan and miRBase softwares, and the relative expression levels for these miRNAs were analyzed in the 10 yak tissues including liver, spleen, lung, kidney, hind leg skeletal muscle, ovary, small intestine, submandibular lymph node, large intestine and intestinal lymph nodes by adding PloyA tail RT-PCR method. The results showed that the Nramp1 gene mRNA was expressed in the 10 examined tissues, and the expression levels in the yak spleen, submandibular lymph node and lung were extremely significantly higher than that in the liver, kidney, large intestine and intestinal lymph node(P<0.01), and significantly higher than that in small intestine tissue (P<0.05). A total of 201 miRNAs that might target to the yak Nramp1 gene were predicted, and 6 of them were selected for expression profiling analysis. It was found that Nramp1 mRNA and bta-miR-106a, bta-miR-20b, bta-miR-17-5p were co-expressed in the yak immune tissues such as the spleen, submandibular lymph node and intestinal lymph node, and were co-expressed with bta-miR-93, bta-miR-106b and bta-miR-20a in yak submandibular lymph nodes and intestinal lymph nodes. There were no significant differences in the expression of bta-miR-93,bta-miR-20a,bta-miR-106a,bta-miR-17-5p and bta-miR-20b between submandibular lymph nodes and intestinal lymph nodes(P>0.05), but the expression of bta-miR-106a and bta-miR-20b in submandibular lymph nodes and intestinal lymph nodes were extremely significantly higher than those in spleen tissues(P<0.01),and the expression of bta-miR-106b in submandibular lymph nodes was extremely significantly higher than that in intestinal lymph nodes(P<0.01). The extensive expression of Nramp1 mRNA in various tissues of yak suggested that it might have a wide range of immunomodulatory effects, and the co-expression of bta-miR-93, bta-miR-20b, bta-miR-106a, bta-miR-106b, bta-miR-20a, bta-miR-17-5p and Nramp1 mRNA in immune tissues indicated that they might have targeted regulatory relationship in immune regulation, but whether there is targeting regulation and their regulation mechanism remains to be further studied.

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