畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (10): 4925-4937.doi: 10.11843/j.issn.0366-6964.2025.10.014

• 遗传育种 • 上一篇    下一篇

基于转录组测序分析METTL14对绵羊骨骼肌卫星细胞成肌分化的影响

何思琦1,2(), 陈倩2, 蒋琳2, 马月辉2, 周胜花1,*(), 赵倩君2,*()   

  1. 1. 山西农业大学动物科学学院,太谷 030801
    2. 中国农业科学院北京畜牧兽医研究所,北京 100193
  • 收稿日期:2025-03-13 出版日期:2025-10-23 发布日期:2025-11-01
  • 通讯作者: 周胜花,赵倩君 E-mail:hesiqiovo@163.com;ZSH991109@163.com;zhaoqianjun@caas.cn
  • 作者简介:何思琦(2000-),女,山西临汾人,硕士生,主要从事动物遗传育种研究,E-mail: hesiqiovo@163.com
  • 基金资助:
    国家自然科学基金面上项目(32172701);国家绒毛用羊产业技术体系项目(CARS-39-01);宁夏回族自治区自然科学基金(2023AAC02077)

The Effect of METTL14 on Myogenic Differentiation of Ovine Skeletal Muscle Satellite Cells Based on Transcriptome Sequencing Analysis

HE Siqi1,2(), CHEN Qian2, JIANG Lin2, MA Yuehui2, ZHOU Shenghua1,*(), ZHAO Qianjun2,*()   

  1. 1. College of Animal Science, Shanxi Agricultural University, Taigu 030801, China
    2. Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2025-03-13 Online:2025-10-23 Published:2025-11-01
  • Contact: ZHOU Shenghua, ZHAO Qianjun E-mail:hesiqiovo@163.com;ZSH991109@163.com;zhaoqianjun@caas.cn

摘要:

旨在探究甲基转移酶样14(methyltransferase-like 14,METTL14)影响绵羊骨骼肌卫星细胞(skeletal muscle satellite cells,SMSCs)成肌分化的分子机制,为解析METTL14调控绵羊骨骼肌卫星细胞分化的分子机制提供理论基础。本研究对SMSCs进行分离并鉴定,将METTL14过表达质粒及对照质粒分别转染进入SMSCs,通过RT-qPCR和Western blot检测其过表达效率及METTL14影响SMSCs分化的功能。对SMSCs过表达METTL14组(OE-14)和对照组(OE-NC)进行转录组测序,以P<0.05且log2|Fold Change|>1为阈值鉴定差异表达基因,进行GO和KEGG富集分析及PPI蛋白质网络互作分析。METTL14过表达能够显著增加SMSCs中METTL14的表达及成肌分化相关基因(MyHCMyoG)的mRNA和蛋白水平,表明METTL14过表达成功,且METTL14能够促进SMSCs的分化。两组中共鉴定到259个差异表达基因,与OE-NC相比,OE-14共有45个基因表达上调,214个基因表达下调。差异基因主要富集到细胞核通路、Rap1信号通路等。PPI蛋白质网络互作分析筛选出8个枢纽基因(Degree≥15), 包括MX1、RSAD2、IFIH1、DDX58、HERC5、ISG15、MX2以及IRF7。本研究表明METTL14通过影响细胞进程和肌肉发育相关的基因和信号通路促进绵羊骨骼肌卫星细胞的分化。

关键词: METTL14, 转录组测序, 骨骼肌卫星细胞, 绵羊, 细胞分化

Abstract:

The aim of this study was to explore the molecular mechanism underlying the effect of methyltransferase like 14 (METTL14) on the myogenic differentiation of sheep skeletal muscle satellite cells(SMSCs) and to provide a theoretical basis for analyzing the molecular mechanism of METTL14 regulating the differentiation of SMSCs. SMSCs were isolated and identified. The overexpression plasmid of METTL14 and the control plasmid were transfected into SMSCs, and the overexpression efficiency and the function of METTL14 affecting SMSCs differentiation were detected by RT-qPCR and Western blot. RNA-seq was performed for METTL14-overexpressed SMSCs(OE-14) and control SMSCs(OE-NC). Differentially expressed genes (DEGs) were identified under the conditions of P < 0.05 and log2|Fold Change| > 1, GO and KEGG enrichment analysis and protein-protein interaction (PPI) network interaction analysis for DEGs was conducted. Overexpression of METTL14 markedly elevated the expression of METTL14, as well as the mRNA and protein levels of myogenic differentiation-related genes (MyHC, MyoG) in ovine SMSCs, thereby demonstrating successful METTL14 overexpression and the enhancement of SMSCs differentiation mediated by METTL14. A total of 259 differentially expressed genes were identified between the two groups. Compared with the OE-NC group, the OE-14 group had 45 up-regulated genes and 214 down-regulated genes. Differential genes were mainly enriched in nuclear pathways, Rap1 signaling pathways, etc. PPI protein network interaction analysis identified 8 hub genes (Degree≥15), including MX1, RSAD2, IFIH1, DDX58, HERC5, ISG15, MX2, and IRF7. This study indicated that METTL14 can promote the differentiation of ovine SMSCs through influencing genes and signaling pathways related to cellular processes and muscle development.

Key words: METTL14, transcriptome sequencing, skeletal muscle satellite cells, sheep, cell differentiation

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