NAT GENET:人类结直肠癌类器官染色体不稳定性和核型进化过程

2019-05-02 海北 MedSci原创

已有的研究显示,染色体分离错误会导致非整倍性染色体和基因组异质性,这是人类癌症的标志。

已有的研究显示,染色体分离错误会导致非整倍性染色体和基因组异质性,这是人类癌症的标志。

预计这些错误的持续高频率(染色体不稳定性(CIN))会严重影响肿瘤的演变和治疗反应。然而,至今为止,我们尚不清楚CIN在人类肿瘤中的流行程度。

最近,使用源自患者的肿瘤类器官(肿瘤PDO)的三维活细胞成像,研究人员发现,CIN广泛存在于直肠癌中,无论背景基因改变如何,包括微卫星不稳定性。

细胞命运跟踪显示,尽管有丝分裂错误常常伴随细胞死亡,但一些肿瘤PDO对有丝分裂错误很不敏感。单细胞核型测序证实了肿瘤PDO中拷贝数改变的异质性,并且显示单克隆系在体外随时间进化出新的核型。

因此,研究人员得出结论,正在进行的CIN直肠癌类器官中很常见,并且提出CIN水平和对有丝分裂错误的耐受性会形成非整倍性染色体和核型异质性。


原始出处:

Bolhaqueiro ACF et al. Ongoing chromosomal instability and karyotype evolution in human colorectal cancer organoids. Nature Genetics, 2019; doi: 10.1038/s41588-019-0399-6.


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    2019-07-31 cy0324
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    2019-08-04 canlab
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