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六价抑制了肌体分化,并诱导了肌管缩
Sun Young Park1, Shan Liu1, Edgar Perez Carbajal2
1Division of Environmental Medicine, Department of Medicine, NYU Grossman School of Medicine, New York, NY 10010, United States of America.
Toxicology and applied pharmacology
|September 24, 2023
概括
六价 (Cr(VI)) 暴露会以剂量依赖的方式抑制肌肉细胞分化和肌管的形成. 这种有毒物质还会导致肌肉细胞缩,影响骨肌肉的健康.
科学领域:
- 环境毒理学环境毒理学
- 细胞生物学 细胞生物学
- 肌肉生理学 肌肉生理学
背景情况:
- 六价 (Cr(VI)) 是一个广泛存在的工业污染物,已知具有发育和系统毒性.
- 以前的研究将Cr (VI) 暴露与成年动物的发育问题和肌肉损伤标志物联系起来.
- 对于Cr(VI) 对肌肉细胞分化的基本过程的具体影响尚不清楚.
研究的目的:
- 为了研究急性六价 (Cr(VI)) 暴露对体外肌原分化的影响.
- 为了确定Cr(VI) 对肌肉细胞发育和结构的剂量依赖性影响.
- 评估Cr(VI) 对肌肉特异性基因表达和卫星细胞功能的影响.
主要方法:
- 暴露小鼠C2C12细胞核和分化细胞核在不同度的CrVI).
- 评估肌管形成和肌肉特异性标记物的表达 (Mck,Mef2,Mymk,Mymx).
- 对关键肌原性调节因子 (MRF) 的分析,包括MyoD,MyoG,Myf5和Myf6.
- 对初级小鼠卫星细胞和甲联合治疗的Cr (VI) 影响的评估.
主要成果:
- 在C2C12神经细胞中,Cr(VI) 暴露以剂量依赖的方式抑制了神经元分化.
- 观察到肌管形成和肌肉特异性基因表达的显著下降.
- Cr(VI) 改变了关键肌源性调节因子 (MRF) 的表达.
- 暴露于Cr (VI) 导致肌管缩,其效应被德甲加剧.
结论:
- 六价 (Cr(VI)) 在体外显著抑制肌原分化和肌肉细胞发育.
- (VI) 暴露会诱导肌管缩,这表明肌肉损伤的可能性.
- 这些发现凸显了Cr (VI) 对骨肌细胞和再生的有害影响.
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