葡萄糖皮质类药物通过刺激巨细胞中克鲁佩尔类因子9的表达来增加脂肪
Yinliang Zhang1, Chunyuan Du1, Wei Wang2
1Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Key Laboratory of Cellular Homeostasis and Disease, Tianjin Medical University, Tianjin, China.
Nature communications
|February 8, 2024
概括
葡萄糖皮质类药物 (GCs) 通过激活巨细胞中的克鲁佩尔类因子9 (Klf9) 引起肥胖,从而使其失活,并破坏脂肪组织的平衡. 在髓状细胞中阻断Klf9可以防止GC诱导的肥胖.
科学领域:
- 内分泌学 在内分泌学.
- 免疫学 免疫学 免疫学
- 代谢研究研究 代谢研究
背景情况:
- 葡萄糖皮质类药物 (GCs) 是强效的药物,具有显著的代谢副作用,包括肥胖.
- 巨细胞在脂肪组织平衡中起着至关重要的作用,是GC作用的关键目标.
- 通过GC诱导肥胖的确切机制仍然不完全理解.
研究的目的:
- 为了阐明巨细胞在葡萄糖皮质激素诱导的肥胖症中的作用.
- 在GC治疗期间研究巨细胞中克鲁佩尔样因子9 (Klf9) 的功能.
- 为了确定缓解GC诱导的代谢功能障碍的潜在治疗点.
主要方法:
- 用德克萨米他 (Dex) 对小鼠进行治疗,并对髓状细胞中的Klf9表达进行基因操纵.
- 对巨细胞极化标记物 (M1,M2a) 和活动的评估.
- 对脂肪细胞中的基因表达,发热,脂质积累和STAT3信号的分析.
主要成果:
- 德克萨米他 (Dex) 在巨细胞中显著上调克鲁佩尔类因子9 (Klf9),导致巨细胞失活.
- 骨髓细胞特异性Klf9过度表达促进了肥胖,而骨髓细胞特异性Klf9淘汰 (mKlf9KO) 的小鼠是瘦的.
- mKlf9KO在很大程度上预防了慢性GC治疗引起的肥胖症.
- GC诱导的KLF9调用SIN3A/HDAC复合体来抑制关键的炎症和代谢基因,减少热生成,通过阻断脂肪细胞中的STAT3增加脂质积累.
结论:
- 巨细胞是葡萄糖皮质类药物引起的肥胖的重要媒介.
- 巨细胞中的克鲁佩尔类因子9 (Klf9) 是GC和代谢失调之间的关键分子联系.
- 巨细胞中的KLF9集成了GC的抗炎和不良代谢作用,呈现出潜在的治疗标.
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