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一种基于基因组和表观遗传学分析的新型视网膜母细胞瘤疗法
Jinghui Zhang1, Claudia A Benavente, Justina McEvoy
1Department of Computational Biology and Bioinformatics, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.
Nature
|January 13, 2012
概括
视网母细胞瘤是一种迅速发展的儿童视网膜癌症,由RB1基因损失引起. 瘤显示稳定的基因组,但癌症途径的表观遗传变化,如SYK上调,驱动快速进展.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 视网母细胞瘤是一种激进的儿童视网膜癌症,由RB1基因的双性损失引起.
- 在RB1无活化后,瘤的快速进展表明了基因突变之外的潜在机制.
研究的目的:
- 为了研究驱动RB1损失后视网膜母细胞瘤快速进展的机制.
- 为了确定在视网膜母细胞瘤发育中的合作遗传或表观遗传事件.
主要方法:
- 视网膜母细胞瘤瘤的全基因组测序.
- 评估RB1在基因组稳定中的作用.
- 评估癌症途径中的表观遗传放松调节.
- 在SYK抑制的体外和体内测试.
主要成果:
- 视网母细胞瘤基因组在遗传上稳定,突变率低.
- RB1是唯一一个已知的持续突变的癌症基因.
- 观察到癌症途径的表观遗传解调,包括SYK上调.
- 用抑制剂向SYK诱导了视网膜母细胞瘤细胞死亡.
结论:
- 视网母细胞瘤的进展是由癌症途径的表观遗传失调驱动的,而不仅仅是遗传突变.
- 失去RB1可能会导致表观遗传变化,促进瘤快速生长.
- SYK是视网膜母细胞瘤的潜在治疗点.
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