来自BM-MSCs的FTO过度表达的细胞外囊泡可以通过调节METTL3/YTHDF2-介导的RNA m6A修饰来逆转细胞衰老和衰老,以改善骨关节炎
Lei Chen1, Jia Liu2, Zhitao Rao2
1Department of Orthopedics, Tongji Hospital, School of Medicine, Tongji University, 389 Xincun Road, Shanghai 200065, PR China; Clinical Research Center, Tongji Hospital, School of Medicine, Tongji University, 389 Xincun Road, Shanghai 200065, PR China.
International journal of biological macromolecules
|August 9, 2024
概括
来自过度表达FTO蛋白质的介质干细胞的工程外细胞囊 (EVs) 显示出通过减少细胞衰老和促进自的作用来治疗骨关节炎的潜力.
科学领域:
- 生物医学工程 生物医学工程
- 干细胞生物学 干细胞生物学
- 分子医学是分子医学.
背景情况:
- 骨关节炎 (OA) 是一种退行性关节疾病,治疗选择有限.
- 骨髓介质干细胞 (BM-MSCs) 和它们分泌的细胞外囊泡 (EVs) 显示了对OA的治疗前景.
- 脂肪质量和与肥胖相关的蛋白质 (FTO),一种N6-Methyladenosine (m6A) 脱甲基酶,与OA进展有关.
研究的目的:
- 调查工程BM-MSC衍生的EVs过度表达FTO (FTO-EVs) 的治疗潜力,用于骨关节炎治疗.
- 阐明FTO-EVs在调节状细胞功能和OA发病过程中的潜在分子机制.
主要方法:
- 从BM-MSC产生FTO过度表达的电动汽车.
- 在体外研究中,使用脂聚糖 (LPS) 处理的红细胞来评估细胞衰老,衰老,细胞亡和自.
- 在体内研究使用单酸 (MIA) 诱导的OA小鼠模型.
- 在与自和亡相关的基因中研究m6A修饰动力学 (Atg5,Atg7,BNIP3).
- 评估YTHDF2和METTL3在FTO-EVs中介作用中的作用.
- 使用基因淘汰和过度表达技术进行功能验证.
主要成果:
- FTO-EVs显著抑制了LPS治疗的冠状细胞和MIA治疗的小鼠OA组织中的细胞衰老,衰老和亡.
- FTO-EVs增强了冠状细胞的自,这种效应被ROS掠食者NAC.部分逆转.
- FTO-EVs诱导了Atg5,Atg7和BNIP3的m6A脱甲基化,导致YTHDF2依赖的方式增加了Atg5/Atg7和减少了BNIP3表达.
- FTO-EVs的影响取决于METTL3活性,并且可以通过Atg5/Atg7敲击或BNIP3过度表达来逆转.
结论:
- 来自BM-MSC的FTO-EV通过抑制细胞衰老和细胞亡,同时促进保护性自,对OA产生治疗作用.
- 该机制涉及FTO介导的m6A脱甲基化关键的自和亡相关基因.
- 工程FTO-EVs代表了临床OA治疗的有希望的无细胞治疗策略.
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