遗传 ›› 2025, Vol. 47 ›› Issue (7): 729-741.doi: 10.16288/j.yczz.24-374

• 综述 • 上一篇    下一篇

MicroRNA促进基因表达研究进展

张潇(), 于燕, 宁勇, 洪绮雯, 史怀平()   

  1. 西北农林科技大学动物科技学院,杨凌 712100
  • 收稿日期:2024-12-30 修回日期:2025-02-28 出版日期:2025-04-23 发布日期:2025-04-23
  • 通讯作者: 史怀平,博士,教授,研究方向:生物技术与动物育种。E-mail: huaipingshi@nwafu.edu.cn
  • 作者简介:张潇,博士研究生,专业方向:生物技术与动物育种。E-mail: zhangzexiao@nwafu.edu.cn
  • 基金资助:
    国家重点研发计划(2021YFD1600704);国家重点研发计划(2022YFD1300200);国家自然科学基金项目(32272828)

Advances in microRNA promoting gene expression

Xiao Zhang(), Yan Yu, Yong Ning, Qiwen Hong, Huaiping Shi()   

  1. College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
  • Received:2024-12-30 Revised:2025-02-28 Published:2025-04-23 Online:2025-04-23
  • Supported by:
    National Key Research and Development Plan of China(2021YFD1600704);National Key Research and Development Plan of China(2022YFD1300200);National Natural Science Foundation of China(32272828)

摘要:

MicroRNA(miRNA)是一类具有调节功能的内源性非编码单链RNA。传统观点认为,miRNA在细胞质中与靶标mRNA 3′UTR结合降解mRNA或抑制翻译,从而发挥负向调控作用。然而,这一模型难以解释许多miRNA在基因表达中的促进作用。越来越多的研究表明,增强子或启动子介导的转录激活,以及UTR介导翻译促进,是miRNA正向调控基因表达的主要机制;此外,miRNA的亚细胞分布及具体的生理条件也会影响miRNA的功能。本文综述了内源性动物miRNA正向调控的机制及特点,旨在深入探讨miRNA调控基因表达的分子机制,并为后续研究提供参考。

关键词: miRNA, 靶基因, 正向调控

Abstract:

MicroRNAs (miRNAs) are a class of endogenous, single-stranded, noncoding RNAs ranging from 20~24 nucleotides in length. Traditionally, miRNAs are considered to inhibit mRNA translation or promote mRNA degradation, thereby exerting a negative regulatory effect on gene expression by binding to the 3′ untranslated region (UTR) in the cytoplasm. However, this framework cannot fully explain the observed positive roles of certain miRNAs in gene regulation. Recent studies have identified mechanisms such as enhancer- and promoter-mediated transcriptional activation, as well as UTR-mediated translational activation, as key processes underlying the positive regulation of gene expression by miRNAs. Additionally, the subcellular distribution of miRNAs and specific physiological conditions can influence their functions. In this review, we summarize the biological characteristics and functions of miRNAs, with the goal of providing insights for future research in this field.

Key words: miRNAs, target gene, activation