肥胖诱导的型脂肪细胞死亡导致TREM2-依赖的巨细胞功能障碍和脂肪组织炎症
Cheoljun Choi1, Junhyuck Lee1, Gyeongran Park1
1College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea.
iScience
|January 9, 2026
概括
在肥胖症中,热性脂肪细胞死亡导致TREM2分泌,损害巨细胞功能并促进炎症. 抑制ADAM10/17可以通过减少TREM2裂变和增强细胞化来改善代谢健康.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢性疾病研究研究
- 细胞生物学 细胞生物学
背景情况:
- 在骨髓细胞2 (TREM2) 上表达的触发受体与脂质相关的巨细胞有关,但其在脂肪组织中的作用仍在争论中.
- 高脂肪饮食 (HFD) 诱导的肥胖会导致脂肪组织炎症和代谢功能障碍.
- 了解TREM2在肥胖中的作用对于代谢健康至关重要.
研究的目的:
- 研究TREM2在脂肪组织炎症和HFD诱导的肥胖期间代谢功能障碍中的作用.
- 为了阐明驱动TREM2在脂肪组织中分裂的机制.
- 评估抑制TREM2分泌的治疗潜力.
主要方法:
- 使用高脂肪饮食 (HFD) 肥胖的小鼠模型.
- 在淋巴腺白脂肪组织 (GWAT) 中研究了TREM2裂变.
- 在体外共培养系统中使用与质脂肪细胞和RAW264.7细胞.
- 使用的药理抑制剂 (GM6001) 针对ADAM10/17金属蛋白酶.
- 评估了巨细胞的两极分化和细胞活动.
主要成果:
- 在GWAT中,HFD食增加了TREM2裂变,由ADAM10和ADAM17上调调节介导.
- 质,但不是质,脂肪细胞诱导了STING激活,ADAM10/17上调,以及巨细胞中的TREM2分泌.
- GM6001治疗减少了TREM2裂变,并增强了 pyroptotic脂肪细胞的细胞化.
- 在体内给予GM6001减弱了HFD诱导的体重增加,改善了代谢参数,并促进了抗炎性巨细胞两极分化.
结论:
- 热性脂肪细胞死亡驱动了通过ADAM10/17的病态TREM2流放.
- 这种流失有助于巨细胞功能障碍和肥胖的脂肪组织炎症.
- 抑制ADAM10/17代表了与肥胖相关的代谢功能障碍的潜在治疗策略.
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