基于对Laiwu猪的肌肉内脂肪含量的竞争性内源性RNA调节网络的构建,基于全转录组分析
Zhe Tian1,2, Wenwen Li1,2, Mubin Yu1
1College of Animal Science and Technology, Shandong Engineering Research Center for Protection of Livestock and Poultry Genetic Resources and Biological Breeding, Qingdao Agricultural University, Qingdao, China.
Animal genetics
|January 25, 2026
概括
这项研究揭示了猪肌内脂肪 (IMF) 沉积的新型监管网络. 鉴定出SCML4基因是促进脂肪形成的关键调节器,为肉质特征提供了洞察力.
科学领域:
- 动物科学动物科学
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 肌肉内脂肪 (IMF) 含量显著影响肉质,并且在不同品种猪之间存在差异.
- 调节脂肪细胞数量和大小的基础分子机制,IMF的关键决定因素,仍然不完全理解.
研究的目的:
- 阐明管理脂肪 (Laiwu,LW) 和瘦 (DLY) 猪类型之间IMF沉积差异的分子机制.
- 通过转录基因分析识别参与国际货币基金组织形成的关键调节基因和网络.
主要方法:
- 来自LW和DLY猪的长腰背肌的整体转录组分析 (mRNA,miRNA,圆形RNA).
- 不同基因表达分析和综合网络构建 (mRNA-miRNA,ceRNA网络).
- 使用3T3-L1细胞进行SCML4基因的体外功能验证.
主要成果:
- 在LW和DLY猪之间鉴定了1899个差异表达的mRNA,10个miRNA和247个圆形RNA.
- 描述了两个mRNA-miRNA网络模块和一个具有竞争力的内源RNA (ceRNA) 网络,可能调节IMF.
- 已证明,减少SCML4表达在体外抑制关键脂肪形成蛋白 (PPARγ,FABP4).
结论:
- 一个新的具有竞争力的内源性RNA调节网络涉及到IMF对猪的含量调节.
- SCML4基因被确定为IMF沉积的可能积极调节者,为改善肉质提供了潜在的目标.
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