CELL:代谢驱动的表观组导致致命性婴儿室管膜瘤

2020-05-25 MedSci原创 MedSci原创

后颅窝(PFA)室管膜瘤是婴幼儿后脑的致命恶性肿瘤。由于缺乏高度复发性的体细胞突变,PFA婴儿室管膜瘤被认为是表观遗传学驱动的肿瘤,但是现在该疾病缺乏模型系统。

后颅窝(PFA)室管膜瘤是婴幼儿后脑的致命恶性肿瘤。由于缺乏高度复发性的体细胞突变,PFA婴儿室管膜瘤被认为是表观遗传学驱动的肿瘤,但是现在该疾病缺乏模型系统。

最近,研究人员发现,PFA室管膜瘤是在缺氧下维持的,与特定代谢产物的可及性受限有关,以减少组蛋白甲基化,并增加组蛋白3赖氨酸27(H3K27)处的脱甲基化和乙酰化。

PFA室管膜瘤从人类发育的前三个月的细胞系中启动,那时胎儿在限制性的氧中居住。

与其他室管膜瘤不同的是,PFA细胞瞬时暴露在环境氧中会引起不可逆的细胞毒性。PFA肿瘤表现出较低的H3K27me3的基础水平,矛盾的是,抑制H3K27甲基化会特异性地破坏PFA肿瘤的生长。

因此,靶向代谢和/或表观基因组,为PFA室管膜瘤患者的合理治疗提供了独特的机会。

 

原始出处:

Kulandaimanuvel Antony Michealraj et al. Metabolic Regulation of the Epigenome Drives Lethal Infantile Ependymoma. CELL (2020). DOI:https://doi.org/10.1016/j.cell.2020.04.047

 

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