作为一种肌,CTRP9通过LAMP-2A/NLRP3通路减轻了肉症
Linxi Li1,2, Anju Zuo1,2, Ruoyu Yin3
1Department of General Practice, Qilu Hospital of Shandong University, Jinan, Shandong, China.
Cell death & disease
|October 7, 2025
概括
研究人员发现C1q/TNF相关蛋白9 (CTRP9) 通过增强伴侣介导自 (CMA) 和减少炎症来保护肌肉衰老和缩. 这一发现为肉症 (肌肉消耗) 提供了一个新的治疗点.
科学领域:
- 肌肉生物学 肌肉生物学
- 细胞衰老 细胞衰老
- 自自是一种自的过程.
背景情况:
- 肉症涉及肌肉缩和受损的再生,与衰老和炎症有关.
- 人们对沙科佩尼亚中伴手术介导的自 (CMA) 的作用尚不了解.
- 与C1q/TNF相关的蛋白9 (CTRP9) 是一种具有潜在保护功能的新型肌蛋白.
研究的目的:
- 研究CTRP9在骨肌肉衰老和再生中的作用.
- 阐明CTRP9功能背后的机制,特别是其与CMA和炎症通路的相互作用.
- 评估CTRP9作为萨科佩尼亚的潜在治疗点.
主要方法:
- 在C2C12神经细胞和CTRP9淘汰小鼠中利用了一种复制性衰老模型.
- 评估了CTRP9,LAMP2A,NLRP3和IL-1β的水平.
- 检查了CMA活性和NLRP3降解.
- 在试验室和初级人体肌细胞体中评估了肌源性分化和缩标志物.
主要成果:
- 随着细胞衰老,CTRP9的表达下降,与减少的LAMP2A,增加的NLRP3和升高的IL-1β相关.
- CTRP9淘汰赛小鼠表现出类似的分子特征.
- 对GcTRP9的治疗恢复了LAMP2A,增强了CMA,降低了NLRP3,并缓解了炎症.
- gCTRP9促进了分化和抑制了缩标志物,改善了肌管完整性.
结论:
- CTRP9-LAMP2A-NLRP3轴对于肌肉的再生和维护至关重要.
- 通过增强CMA介导的NLRP3降解,CTRP9减轻了肉症.
- 通过调节分化和缩途径,CTRP9提出了一种有前途的治疗策略,用于治疗肉类.
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