畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (11): 5475-5488.doi: 10.11843/j.issn.0366-6964.2025.11.011

• 遗传育种 • 上一篇    下一篇

干扰MAPK6基因对秦川牛成肌细胞分化的影响研究

李炳志1,2,4(), 郭俊涛2,3, 王建芳2,3, 于胜晨2,3, 潘月婷2,3, 余横伟2,3, 刘海兵2,3, 张可2,3, 成功2,3, 田万强1,4,*(), 昝林森2,3,*()   

  1. 1. 陕西农林职业技术大学动物工程学院, 杨凌 712100
    2. 西北农林科技大学动物科技学院, 杨凌 712100
    3. 国家肉牛改良中心, 杨凌 712100
    4. 反刍动物高效繁育技术陕西省高等学校重点实验室, 杨凌 712100
  • 收稿日期:2025-03-25 出版日期:2025-11-23 发布日期:2025-11-27
  • 通讯作者: 田万强,昝林森 E-mail:3640910@qq.com;twqiang2003@163.com;zanlinsen@163.com
  • 作者简介:李炳志(1982-),男,山东人,博士,主要从事动物遗传育种与繁殖研究,E-mail: 3640910@qq.com
  • 基金资助:
    国家重点研发计划(2023YFD1300100);国家肉牛牦牛产业技术体系项目(CARS-37);陕西省重点研发计划(2022ZDLNY01-01);陕西省畜禽育种两链融合重点专项(2022GD-TSLD-46-0102);陕西省教育厅重点科学研究计划项目(24JS060)

Study on the Effect of Interfering with MAPK6 Gene on the Differentiation of Qinchuan Cattle Myoblast Cells

LI Bingzhi1,2,4(), GUO Juntao2,3, WANG Jianfang2,3, YU Shengchen2,3, PAN Yueting2,3, YU Hengwei2,3, LIU Haibing2,3, ZHANG Ke2,3, CHENG Gong2,3, TIAN Wanqiang1,4,*(), ZAN Linsen2,3,*()   

  1. 1. College of Animal Engineering, Shaanxi A&F Technology University, Yangling 712100, China
    2. College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
    3. National Beef Cattle Improvement Center, Yangling 712100, China
    4. Key Laboratory for Efficient Ruminant Breeding Technology of Higher Education Institutions in Shaanxi Province, Yangling 712100, China
  • Received:2025-03-25 Online:2025-11-23 Published:2025-11-27
  • Contact: TIAN Wanqiang, ZAN Linsen E-mail:3640910@qq.com;twqiang2003@163.com;zanlinsen@163.com

摘要:

旨在探究干扰MAPK6(细胞外信号调节激酶3,ERK3)基因对秦川牛成肌细胞分化的影响及其作用机理。本研究通过qRT-PCR技术检测MAPK6基因在秦川牛不同组织中的表达谱。采用siRNA技术干扰MAPK6基因在秦川牛成肌细胞中的表达,通过qRT-PCR和Western blot检测其干扰效率及肌管分化相关基因的表达水平,并观察肌管表型变化。随后对其进行转录组测序,筛选差异表达基因并进行GO功能注释和KEGG通路富集分析。此外,对成肌分化相关通路进行了初步验证。结果表明,MAPK6在秦川牛背最长肌组织中特异性高表达。干扰MAPK6极显著促进了秦川牛成肌细胞的肌管分化融合(P < 0.01),极显著增加了成肌分化相关基因MEF2C、MYH7的表达(P < 0.01)及MEF2C、MYL2的蛋白表达(P < 0.01),显著增加成肌MYH7的蛋白表达(P < 0.05)。转录组结果发现,与对照组相比,干扰MAPK6基因共有3 224个基因差异表达,其中上调1 707个,下调1 517个。KEGG富集结果显示,差异基因主要富集在PI3K-AKT、MAPK信号通路。MAPK6基因的干扰会显著降低MAPK信号通路中ERK1/2、p-ERK1/2蛋白的表达(P < 0.01)。本研究初步阐明了MAPK6基因在牛肌肉生成中的作用和机理,为提高牛肉品质和指导肉牛分子育种策略奠定基础。

关键词: 秦川牛, 骨骼肌, MAPK6基因, 成肌细胞分化

Abstract:

The aim of this study was to investigate the effect of interfering with MAPK6 (extracellular signal regulated kinase 3, ERK3) gene on the differentiation of Qinchuan cattle myoblasts and its action mechanism. The expression profile of the MAPK6 gene in different tissues of Qinchuan cattle was detected using qRT-PCR technology. siRNA technology was used to interfere with the expression of MAPK6 gene in Qinchuan cattle myoblasts. The interference efficiency and expression levels of myotube differentiation related genes were detected by qRT-PCR and Western blot, and changes in myotube phenotype were observed. Subsequently, transcriptome sequencing was performed to screen differentially expressed genes, followed by GO functional annotation and KEGG pathway enrichment analysis. Additionally, preliminary validation of myogenic differentiation-related pathways was conducted. The results indicated that MAPK6 was highly expressed in the longissimus dorsi muscle tissue of Qinchuan cattle. Interfering with MAPK6 significantly promoted myotube differentiation and fusion in Qinchuan cattle myoblasts (P < 0.01), significantly increased the expression of myogenic differentiation-related genes MEF2C and MYH7 (P < 0.01) and the protein expression of MEF2C and MYL2 (P < 0.01), and significantly increased the protein expression of MYH7 (P < 0.05). The transcriptome results showed that, compared with the control group, there were 3 224 differentially expressed genes after interfering with MAPK6, of which 1 707 were upregulated and 1 517 were downregulated. The KEGG enrichment results showed that differential genes were mainly enriched in the PI3K-AKT and MAPK signaling pathways. Interfering with the MAPK6 gene could significantly reduces the expression of ERK1/2 and p-ERK1/2 proteins (P < 0.01) in the MAPK signaling pathway. This study preliminarily elucidates the role and mechanism of MAPK6 gene in beef muscle production, laying a foundation for improving beef quality and guiding molecular breeding strategies in beef cattle.

Key words: Qinchuan cattle, skeletal muscles, MAPK6 gene, myoblast differentiation

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