[PINK1通过表观遗传调节组织蛋白修饰来抑制结直肠癌细胞的生长]
Meng Wang1, Shijia Luan2, Xiang Fan2
1Department of Colorectal Surgery, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China. wangmeng@zjcc.org.cn.
概括
由PTEN诱导的假定酶1 (PINK1) 在结直肠癌中起到瘤抑制作用. 过度表达PINK1可以抑制癌细胞的增殖和迁移,同时促进细胞亡,与表观遗传修饰有关.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 结肠直肠癌 (CRC) 是一个主要的全球健康问题.
- 在CRC进展中,PTEN诱导的假定酶1 (PINK1) 的作用及其潜在机制仍然不完全理解.
研究的目的:
- 研究PINK1在结直肠癌细胞活力,迁移和亡中的功能.
- 探索PINK1在CRC中发挥作用的表观遗传机制.
主要方法:
- 在CRC细胞系 (HCT116,DLD1) 中使用lentiviral载体过度表达和击败PINK1.
- 细胞增殖 (CCK-8,殖民地形成),迁移 (伤口愈合,Transwell) 和亡 (Hoechst染色) 的评估.
- 通过西式涂抹,分析与亡相关的蛋白质,基因素修饰 (H3K9me3,H3K27me3,H3K9ac,H3K27ac) 和基因素修饰酶 (EZH2,EZH1,SUZ12,HDAC3).
- 使用ATAC-seq.进行全基因组染色质可访问性分析.
主要成果:
- 与正常组织相比,CRC组织中的PINK1表达显著下调.
- 过度表达PINK1抑制了增殖,殖民地形成和迁移,而淘汰则促进了这些恶性表型在CRC细胞中.
- 过度表达PINK1诱导了亡,减少了抗亡蛋白 (MCL-1,BCL-2,BCL-XL),增加了亲亡BAX,以及改变了基因素修饰 (减少了H3K9me3/H3K27me3,增加了H3K9ac/H3K27ac).
- 过度表达PINK1降低了关键的组蛋白修饰酶 (EZH2,EZH1,SUZ12,HDAC3) 的调节,并增加了转录起点周围的染色质可访问性.
结论:
- 在结直肠癌中,PINK1作为瘤抑制剂起作用.
- PINK1抑制CRC细胞的增殖和迁移,并促进细胞亡.
- PINK1通过通过基因组修饰和染色质可访问性变化重塑表观遗传景观,影响结直肠癌的进展.
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