ChREBP由减小压力激活,并调解与GCKR相关的代谢特征
Charandeep Singh1, Byungchang Jin1, Nirajan Shrestha1
1Liver Center, Division of Gastroenterology, Massachusetts General Hospital, Boston, MA 02114, USA; Endocrine Unit, Massachusetts General Hospital, Boston, MA 02114, USA.
Cell metabolism
|December 15, 2023
概括
葡萄糖酶调节剂 (GCKR) 的遗传变异通过改变肝脏减肥压力来影响新陈代谢. 这种压力激活ChREBP,影响脂肪肝和FGF21等特征,将GCKR与人类代谢疾病联系起来.
科学领域:
- 代谢调节 代谢调节 代谢调节
- 分子遗传学 分子遗传学
- 系统生物学 系统生物学
背景情况:
- 葡萄糖激酶调节剂 (GCKR) 的常见遗传变异与多种代谢特征有关.
- GCKR影响肝细胞溶液NADH/NAD+比率 (减小压力).
- 连接GCKR与类代谢效应的确切机制尚不清楚.
研究的目的:
- 调查肝脏减肥应激在调解GCKR对代谢特征的影响中的作用.
- 为了确定减少压力是否足以激活ChREBP.
- 将GCKR-减压-ChREBP轴与人类代谢疾病联系起来.
主要方法:
- 研究了ChREBP激活减少压力的充分性和必要性.
- 研究了肝脏减肥应激对GCKR GWAS特征的影响.
- 定义了肝脏减小压力的转录特征.
- 分析了患有脂肪肝疾病和腹腔外科手术后的人类样本.
主要成果:
- 减少压力足以激活转录因子ChREBP.
- 肝减少性应激会诱导GCKR GWAS特征,包括肝脂肪增加,循环FGF21和乙甘油物种.
- 肝脏减肥应激的转录特征在脂肪肝疾病中是上调的,在减肥手术后是下调的.
- GCKR-GCK相互作用,葡萄糖和乙醇需要减少压力来激活ChREBP.
结论:
- 一个GCKR-减轻压力-ChREBP轴显著影响多个人类代谢特征.
- 肝减少性压力是GCKR性效应的关键调解者.
- 这个轴提供了遗传倾向和代谢性疾病表型之间的机械联系.
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