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托法西提尼布对实验性类风湿性萨尔科佩尼亚肌肉重塑的作用
Ismael Bermejo-Álvarez1, Sandra Pérez-Baos1, Paula Gratal1
1Bone and Joint Research Unit, Rheumatology Department, IIS-Fundación Jiménez Díaz UAM, 28040 Madrid, Spain.
International journal of molecular sciences
|September 9, 2023
概括
在风湿性关节炎 (RA) 子模型中,托法西替尼 (JAK抑制剂) 治疗增加了肌肉质量和改善了肌肉纤维特性. 这表明,JAK抑制剂可以通过减少炎症和促进肌肉再生来抵消类风湿性肉类,而肌肉激酶 (CK) 表示肌肉增加.
科学领域:
- 肌肉生物学和再生医学
- 风湿病学和免疫学
- 药理学和药物发现
背景情况:
- 萨科佩尼亚是类风湿性关节炎 (RA) 的常见并发症.
- 雅努斯激酶抑制剂 (JAKi) 用于治疗 RA,并且已观察到会增加血清激酶 (CK) 水平,暗示可能对肌肉产生影响.
- 在RA的背景下,JAKi对肌肉重塑的确切影响尚未完全阐明.
研究的目的:
- 研究JAK抑制剂托法西替尼 (TOFA) 对RA实验模型中的肌肉重塑的影响.
- 确定TOFA是否可以改善在实验性RA (e-RA) 中观察到的类似肉症的特征.
- 探索肌酸激酶 (CK) 作为JAKi诱导肌肉变化的标记物的作用.
主要方法:
- 在子中建立了一个抗原诱导关节炎 (e-RA) 模型.
- 七只子接受了口服托法西提尼布 (10毫克/公斤/天).
- 通过组织学,RT-PCR和西部斑点分析肌肉组织;测量了CRP,MSTN,CK和肌酸的血清水平.
主要成果:
- 在e-RA子中,托法西提尼布治疗导致体重增加和前肌的大小增加.
- TOFA逆转了e-RA诱导的II型肌肉纤维减少和肌核数量的增加.
- 虽然TOFA没有改变CRP或MSTN,但它显著降低了IL-6,阿特罗金-1,和MuRF-1,并增加了CK水平,表明肌肉缩减少和潜在的肌肉增长.
结论:
- 实验性RA模型与托法西替尼治疗有效地模仿了类风湿性萨尔科佩尼亚.
- 像托法西提尼布这样的JAK抑制剂似乎通过减少IL-6/JAK/STAT信号和肌肉损耗基因来促进RA的肌肉合成,同时恢复肌肉分化.
- 在JAKi治疗期间血清肌酸激酶 (CK) 水平升高可以作为评估肌肉质量增加的有用生物标志物.
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