畜牧兽医学报 ›› 2016, Vol. 47 ›› Issue (7): 1381-1388.doi: 10.11843/j.issn.0366-6964.2016.07.010

• 遗传繁育 • 上一篇    下一篇

miR-324-3p通过调控MC1R基因影响黑色素的形成

曾庆宝,范瑞文,张秋月,郝晓娟,武良琦,任玉红*   

  1. (山西农业大学动物科技学院,太谷 030801)
  • 收稿日期:2015-12-30 出版日期:2016-07-23 发布日期:2016-07-23
  • 通讯作者: 任玉红,教授,E-mail:renyuhong1963@163.com
  • 作者简介:山西省科技攻关项目(20140311019-3);山西农业大学博士科研启动项目(XB2009022)
  • 基金资助:

    山西省科技攻关项目(20140311019-3);山西农业大学博士科研启动项目(XB2009022)

The Effect of miR-324-3p on Melanin Synthesis via MC1R Gene

ZENG Qing-bao,FAN Rui-wen,ZHANG Qiu-yue,HAO Xiao-juan,WU Liang-qi,REN Yu-hong*   

  1. (College of Animal Science and Veterinary Medicine,Shanxi Agricultural University,Taigu 030801,China)
  • Received:2015-12-30 Online:2016-07-23 Published:2016-07-23

摘要:

旨在证明miR-324-3p可以通过调控其预测的靶基因MC1R及其下游基因的表达从而对羊驼皮肤黑色素的合成产生影响。本研究在体外培养的羊驼皮肤黑色素细胞中转染miR-324-3p过表达载体,应用qRT-PCR与Western blotting分析比较各试验组中MC1R基因与毛色相关基因小眼畸形相关转录因子(Microphthalmia-associtated transcription factor,Mitf)、酪氨酸酶(Tyrosinase,Tyr)、酪氨酸相关蛋白2(Tyrosinase related protein 2,Tyrp2)的表达差异性,利用酶标仪检测黑色素产量的变化。结果显示:(1)miR-324-3p在棕色与白色羊驼皮肤中均有表达,且在棕色羊驼皮肤中极显著表达(P<0.01),其相对表达量是白色的1.64倍;(2)黑色素细胞被转染了miR-324-3p过表达载体后,处理组靶基因MC1R及其下游调控基因Mitf、TyrTyrp2的表达量与黑色素产量较空白对照组均有下调,且以Mitf基因表达量极显著下调(P<0.01)。综上表明,羊驼皮肤中miR-324-3p可能通过调控MC1R基因的表达,顺势下调MC1R基因下游调控基因Mitf、TyrTyrp2的表达,最终对羊驼皮肤黑色素细胞中黑色素的类型及合成量产生影响。

Abstract:

To investigate the effect of miR-324-3p on regulating melanin production by targeting MC1R,miR-324-3p was over-expressed by liposome transfection method in alpaca melanocytes in vitro.The expression of MC1R and hair color genes (Mitf,Tyr and Tyrp2) were detected by quantitative real time PCR and Western blotting and the melanin prodution was analyzed by Microplate Reader.The results showed that miR-324-3p was expressed extremely significant difference in the alpaca skins with 1.64 folds in brown alpaca skins vs white alpaca skins(P<0.01),the gene expression of MC1R,Mitf,Tyr and Tyrp2 were down-regulated and the melanin production was reduced(especially Mitf (P<0.01)).The results suggested that miR-324-3p regulated melanogenesis by targeting MC1R gene to down-regulate the expression of the downstream genes including Mitf,Tyr and Tyrp2 in the skin of alpaca.

中图分类号: