天津医药 ›› 2016, Vol. 44 ›› Issue (4): 434-437.doi: 10.11958/20150116

• 实验研究 • 上一篇    下一篇

大鼠miR-142-3p、 miR-145-3p表达模式分析

吴慧, 赵宇龙, 王艳红, 房兴堂, 陈宏, 张春雷△   

  1. 江苏师范大学生命科学学院 (邮编221116)
  • 收稿日期:2015-08-20 修回日期:2015-11-10 出版日期:2016-04-15 发布日期:2016-05-20
  • 通讯作者: △通讯作者 E-mail: clzhang@jsnu.edu.cn E-mail:981578020@qq.com
  • 作者简介:吴慧 (1989), 女, 硕士研究生, 主要从事乳腺分子生物学研究
  • 基金资助:
    国家自然科学基金资助项目 (31472077)

The expression pattern of miR-142-3p and miR-145-3p in rat tissues

WU Hui, ZHAO Yulong, WANG Yanhong, FANG Xingtang, CHEN Hong, ZHANG Chunlei △   

  1. School of Life Science of Jiangsu Normal University, Xuzhou 221116, China
  • Received:2015-08-20 Revised:2015-11-10 Published:2016-04-15 Online:2016-05-20
  • Contact: △Corresponding Author E-mail: clzhang@jsnu.edu.cn E-mail:981578020@qq.com

摘要: 摘要: 目的 筛选并鉴定对大鼠乳腺发育和泌乳调控起关键作用的微 RNAs (miRNAs)。方法 以 U6 为内参基因, 运用实时荧光定量 PCR, 比较 miR-142-3p、 miR-145-3p 在泌乳 21 d 大鼠乳腺、 肝、 心、 脾、 肺、 肾、 卵巢、 子宫各器官的组织样品表达量的差异及不同泌乳阶段 (1、 7、 21 d) 乳腺组织 miR-142-3p、 miR-145-3p 的表达规律。结果 miR-142-3p 在泌乳 21 d 各组织的表达存在差异, 乳腺中的表达量显著高于心、 脾、 肺、 肾、 卵巢和子宫, 仅次于肝中的表达量 (P < 0.05)。miR-145-3p 在乳腺中的表达量显著高于肝、 脾和肾, 而在心、 肺、 卵巢和子宫中差异无统计学意义 (P > 0.05)。乳腺组织在泌乳 1、 7、 21 d 比较, miR-142-3p 的相对表达量持续下调, 而 miR-145-3p 的相对表达量先下调后上调。结论 miR-142-3p 和 miR-145-3p 在大鼠各组织及不同生理时期存在表达差异; miR-142-3p 可通过调节靶基因催乳素受体 (Prlr) 来调控乳腺的发育和泌乳的形成, miR-145-3p 可能具有与 miR-145、 miR-145-5p 相似的功能。

关键词: 乳腺, 动物, 微 RNAs, 肝, 心脏, 脾, 肺, 肾, 卵巢, 子宫, 大鼠, Sprague-Dawley, miR-142-3p, miR-145-3p, 实时荧光定量 PCR

Abstract: Abstract: Objective To screen and identify the key miRNAs during mammary gland development and milk secretion of rats. Methods Gene U6 was taken as interior label gene by real time-PCR to compare the differences of expression levels of miR-142-3p and miR-145-3p in the mammary gland, liver, heart, spleen, lung, kidney, ovary and uterus after 21 postpartum. Moreover, the expressions of miR-142-3p and miR-145-3p in different stages (1, 7 and 21 d) of lactation were summarized. Results There was significant difference in miR-142-3p in lactation 21 d between different tissues. The expression of miR- 142-3p was significantly higher in mammary gland than that in heart, spleen, lung, kidney, ovary and uterus tissues, which was second only to the expression in liver (P < 0.05). The expression of miR-145-3p was significantly higher in mammary gland than that in liver, spleen and kidney. There was no significant difference in the expression of miR-145-3p between heart, lung, ovary and uterus (P > 0.05). Furthermore, the relative expression level of miR-142-3p was continuing downward continued to decline in breast at different stages of lactation, while the relative expression level of miR-145-3p was up-regulated after down- regulating. Conclusion miR-142-3p and miR-145-3p are differentially expressed in different tissues and physiological periods in rats. In addition, miR-142-3p can regulate the growth of mammary gland and the formation of lactation by targeting prolactin receptor (Prlr), miR-145-3p may have the same function with miR-145 and miR-145-5p.

Key words: mammary glands, animal, microRNAs, liver, heart, spleen, lung, kidney, ovary, uterus, rats, Sprague-Daw? ley, miR-142-3p, miR-145-3p, real time-PCR