十-十一转位-2 (TET2) 是光滑肌肉细胞可塑性的主调节者
Renjing Liu1, Yu Jin, Wai Ho Tang
1Department of Internal Medicine, Yale Cardiovascular Research Center, Section of Cardiovascular Medicine (R.L., Y.J., W.T., X.Z., J.H., J.Y., K.A.M.), Department of Surgery (Cardiac Surgery) (L.Q., G.T.), and Department of Pharmacology (K.A.M.), Yale University, New Haven, CT.
Circulation
|October 1, 2013
概括
十-十一转位-2 (TET2) 是平滑肌肉细胞 (SMC) 分化的主表观遗传调节器. 失去TET2和5-基甲基细胞因子 (5-hmC) 与血管损伤和疾病相关,而TET2的恢复减轻了增生症.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 细胞生物学 细胞生物学
- 血管生物学 血管生物学
背景情况:
- 光滑肌细胞 (SMC) 具有显著的可塑性,对生理过程至关重要,但与动脉样硬化等病理有关.
- 虽然像MYOCD和KLF4这样的调节者是已知的,但对可逆SMC分化的统一表观遗传机制仍然难以捉摸.
研究的目的:
- 确定控制平滑肌肉细胞可逆分化的表观遗传机制.
- 研究DNA修饰酶在SMC可塑性和血管疾病中的作用.
主要方法:
- 使用了人类SMC,动脉组织和小鼠模型.
- 雇佣的TET2淘汰和过度表达研究.
- 进行了染色体免疫沉,并评估了5-基甲基细胞素 (5-hmC) 水平.
主要成果:
- SMC的可塑性是由十-十一转位-2 (TET2) 控制的;TET2和5-hmC在不分化的SMC中被减少.
- 在TET2中,TET2 Knockdown抑制了促契合基因 (MYOCD,SRF) 并提高了KLF4的调节;TET2过度表达诱导了SMC表型.
- TET2调节染色质可访问性,其损失与血管损伤和动脉样硬化疾病的严重程度相关.
结论:
- TET2被确定为SMC差异化的新型和必不可少的表观遗传调节器.
- TET2操纵影响SMC基因表达和染色体格局,为血管病理提供治疗潜力.
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