代谢调节器LKB1控制脂肪组织ILC2PD-1表达和线粒体平衡,以防止胰岛素抵抗
Jiping Sun1, Youqin Zhang1, Qingbing Zhang1
1Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
脂肪组织2组先天性淋巴细胞 (ILC2s) 中肝激酶B1 (LKB1) 的激活受损导致肥胖症的胰岛素抵抗. 准LKB1-PD-1通路可能治疗代谢性疾病.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢过程中的代谢.
- 细胞生物学 细胞生物学
背景情况:
- 脂肪组织中的2组先天性淋巴细胞 (ILC2s) 对于代谢平衡和2型免疫至关重要.
- 功能障碍的ILC2s与与肥胖相关的胰岛素抵抗有关,但机制尚不清楚.
研究的目的:
- 研究肝激酶B1 (LKB1) 在脂肪组织ILC2功能中的作用及其对胰岛素抵抗的贡献.
主要方法:
- 从肥胖小鼠和人类的ILC2中评估LKB1激活.
- 在ILC2s.中利用了LKB1的遗传切除.
- 分析了ILC2线粒体代谢,PD-1表达,NFAT激活和线粒细胞衰变.
- 研究PD-1阻断对ILC2功能和体内胰岛素耐药性的影响.
主要成果:
- 肥胖的ILC2s表现出LKB1激活受损.
- 在ILC2s中LKB1缺乏会破坏线粒体功能,抑制免疫反应,并加剧胰岛素抵抗.
- LKB1缺乏导致PD-1通过NFAT的表达增加,通过减少Bcl-xL促进线粒.
- 在肥胖小鼠中,PD-1 阻塞恢复了 ILC2 功能,并逆转了胰岛素抵抗.
结论:
- LKB1-PD-1信号轴对于维持ILC2功能和代谢健康至关重要.
- 准LKB1-PD-1通路为胰岛素抵抗等代谢疾病提供了潜在的治疗策略.
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