富含脂肪细胞的酒精脱酶ADH1B在人类脂肪生成中发挥着重要的细胞自主作用
Jérémie Gautheron1,2, Solaf Elsayed3, Valeria Pistorio1,2
1Centre de Recherche Saint-Antoine, Sorbonne Université-Inserm, Paris 75012, France.
概括
酒精脱酶1B (ADH1B) 对人类脂肪细胞的分化至关重要. 它的缺乏会损害脂质积累和标记物表达,突出显示它在脂肪细胞发育中的作用.
科学领域:
- 生物化学 生化学
- 细胞生物学 细胞生物学
- 代谢疾病 代谢疾病
背景情况:
- 酒精脱酶1B (ADH1B) 是一种灵长类动物特有的酶,在脂肪组织和肝脏中高度表达.
- 脂肪组织中的ADH1B表达受到肥胖和胰岛素的调节,其干扰会损害脂肪细胞的功能.
研究的目的:
- 阐明ADH1B在人类脂肪细胞分化中的特定作用.
- 研究ADH1B影响脂肪生成的机制.
主要方法:
- 使用CRISPR/Cas9基因编辑来删除人类脂肪干细胞 (ASC) 中的ADH1B.
- 救援实验包括用视网膜酸 (RA) 或视网膜醇化ADH1B缺乏细胞.
- 评估了ADH1B变体 (p.Arg313Cys) 的酶活性和二元化.
主要成果:
- 缺乏ADH1B的ASC表现出差异化受损,甘油三积累最小,脂肪细胞标志物表达减少.
- 9-cis-retinoic acid (RA) 在ADH1B缺乏细胞中显著挽救了脂质积累和分化标志物表达.
- 一种与先天性脂质变异相关的ADH1B变体 (p.Arg313Cys) 显示了减弱的二分化和酶活性,未能挽救分化.
结论:
- ADH1B在人类脂肪细胞分化中起着关键的细胞自主作用.
- ADH1B作为内源性视网酸的重要来源,用于脂肪生成.
- 研究的ADH1B变体的患病率表明,它不是严重脂质营养不良的常见原因.
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