河南农业科学 ›› 2022, Vol. 51 ›› Issue (9): 124-132.DOI: 10.15933/j.cnki.1004-3268.2022.09.013

• 畜牧·兽医 • 上一篇    下一篇

猪SREBP-1c 基因表达谱及其对肌内脂肪细胞脂质沉积的影响

卢清侠1,王欧阳2,张彬1,王璟1,陈俊峰1,马强1,张家庆1,任巧玲1,邢宝松1,曹海3
  

  1. (1.河南省农业科学院畜牧兽医研究所/河南省畜禽繁育与营养调控重点实验室,河南 郑州 450002;2.三门峡市农业农村局,河南 三门峡 472000;3.河南兴锐农牧科技有限公司,河南 信阳 465550)
  • 收稿日期:2022-04-20 出版日期:2022-09-15 发布日期:2022-11-18
  • 通讯作者: 王璟(1985-),女,陕西潼关人,副研究员,博士,主要从事猪的遗传育种研究。E-mail:wangjing_0407@163.com
  • 作者简介:卢清侠(1982-),女,山西侯马人,副研究员,博士,主要从事猪的育种研究。E-mail:luqingxia82@163.com。王欧阳为同等贡献作者
  • 基金资助:
    国家重点研发计划项目(2021YFD1301200);河南省优秀青年科学基金项目(222300420051);国家自然科学基金青年基金项
    目(31601927);河南省农业科学院科技创新团队项目(2022TD34);河南省重点研发与推广专项(212102110010);河南省农业科学院自主创新项目(2022ZC42)

Expression Profile of Porcine SREBP‑1c Gene and Its Effect on Lipid Deposition in Intramuscular Adipocytes

LU Qingxia1,WANG Ouyang2,ZHANG Bin1,WANG Jing1,CHEN Junfeng1,MA Qiang1,ZHANG Jiaqing1,REN Qiaoling1,XING Baosong1,CAO Hai3   

  1. (1.Institute of Animal Husbandry and Veterinary Science,Henan Academy of Agricultural Sciences/Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation,Zhengzhou 450002,China;2.Agricultural and Rural Bureau of Sanmenxia,Sanmenxia 472000,China;3.Henan Xing Rui Agricultural and Animal Husbandry Technology Co.,Ltd.,Xinyang 465550,China)
  • Received:2022-04-20 Published:2022-09-15 Online:2022-11-18

摘要: 为探究固醇调节元件结合蛋白1c(SREBP-1c)基因对猪脂质沉积的作用机制,采集淮南猪不同育肥时期背最长肌和皮下脂肪组织,利用实时荧光定量(RT-qPCR)技术分析其表达变化趋势;在猪原代肌内脂肪细胞中进行SREBP-1c 干扰试验,采用RT-qPCR检测SREBP-1c互作基因及脂质沉积相关基因的表达量,并通过油红O染色检测脂质沉积变化。结果显示,随着育肥进展,SREBP-1c在猪背最长肌和皮下脂肪组织的表达量持续极显著(P<0.01)和显著(P<0.05)上调,提示SREBP-1c可能对猪背最长肌脂质沉积的调控作用更强。在猪原代肌内脂肪细胞中干扰SREBP-1c,其互作基因PPARγ、C/EBPα及脂质沉积相关基因FAS、FABP4、CIDEC的表达量均极显著(P<0.01)下调。油红O染色结果显示,SREBP-1c表达量降低,肌内脂肪细胞脂质沉积明显减少。以上结果表明,SREBP-1c可通过调控脂质生成相关基因表达,影响肌内脂肪细胞的脂质沉积。

关键词: 猪, 固醇调节元件结合蛋白1c基因, 肌内脂肪细胞, 脂质沉积, RNA干扰

Abstract: To investigate the effect of sterol regulatory element binding protein⁃1c(SREBP‑1c)gene on lipid deposition in pigs,the longest dorsal muscle and subcutaneous adipose tissue at different fattening periods were collected from Huainan pigs in this study,and the expression trends of SREBP‑1c were analysed using real⁃time fluorescence quantitative PCR(RT⁃qPCR);SREBP‑1cinterference assays were performed in pig primary intramuscular adipocytes,and the expression levels of SREBP‑1c interacting genes and lipid deposition⁃related genes were detected using RT⁃qPCR,and the changes of lipid deposition were detected by oil red O staining.The results showed that the expression levels of SREBP‑1c in the longest dorsal muscle and subcutaneous adipose tissue were consistently extremely significantly up⁃regulated(P<0. 01)and significantly up⁃regulated(P<0. 05)repectively,indicating that SREBP‑1c played a stronger regulatory role in lipid deposition in the longest dorsal muscle.In porcine primary intramuscular adipocytes,after interfering with SREBP‑1c expression,the SREBP‑1c interacting genes PPARγ and C/EBPα and lipogenesis⁃related genes FAS,FABP4 and CIDEC were extremely significantly downregulated(P<0. 01),and oil red O staining showed that lipid deposition was obviously reduced.These results suggested that SREBP‑1c could affect lipid deposition in intramuscular adipocytes by regulating the expression of genes related to lipid deposition.

Key words: words:Pig, SREBP?1c gene, Intramuscular adipocyte, Lipid deposition, RNA interference

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