概括
在融合细胞中激活肌肉基因需要特定的表观遗传修饰. 用5-azacytidine (5-aza-CR) 治疗HeLa细胞启用了肌肉基因表达,表明DNA甲基化.
科学领域:
- 细胞生物学 细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因调节 基因调节
背景情况:
- 纤维细胞中的沉默肌肉基因可以在与肌肉细胞融合时被激活.
- 在纤维细胞中这种激活不需要显著的DNA合成或主要的染色质重塑.
研究的目的:
- 为了研究由HeLa细胞与肌肉细胞融合而形成的异质体中的肌肉基因激活.
- 确定是否需要表观遗传修饰,特别是DNA甲基化,以使非肌肉细胞的肌肉基因表达.
主要方法:
- 希拉细胞与肌肉细胞的融合,形成异体.
- 在融合之前用5-azacytidine (5-aza-CR) 治疗HeLa细胞.
- 分析肌肉特异性基因表达 (例如,5.1H11抗原,MM-肌激酶) 在得到的异体体中.
主要成果:
- 当未释放的HeLa细胞与肌肉细胞融合时,没有观察到肌肉基因激活.
- 5-aza-CR治疗的HeLa细胞与肌肉细胞的融合诱导了早期和晚期肌肉基因的表达.
- 早期和晚期肌肉基因的表达通常不是协调的,这表明独立调节.
结论:
- 表观遗传变化,可能涉及由5-aza-CR诱导的DNA甲基化减少,对于HeLa细胞中的肌肉基因表达是必要的.
- 在HeLa肌肉异质体中肌肉基因激活取决于肌肉细胞的转作用因子和HeLa细胞的容许性表观遗传修饰.
- 肌肉基因的顺序表达可能不相互依赖.
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