Nature:研究人员发现介导基底细胞癌复发的细胞亚群

2018-10-10 海北 MedSci原创

基底细胞癌(BCC)是人类中最常见的癌症,其原因是Hedgehog途径的组成性激活。几种Smoothened抑制剂已经被用于治疗Hedgehog介导的恶性肿瘤,包括BCC和成神经管细胞瘤。

基底细胞癌(BCC)是人类中最常见的癌症,其原因是Hedgehog途径的组成性激活。几种Smoothened抑制剂已经被用于治疗Hedgehog介导的恶性肿瘤,包括BCC和成神经管细胞瘤。Vismodegib是一种Smoothened抑制剂,在大多数BCC患者中导致BCC缩小,但其介导BCC消退的机制尚不清楚。

最近,研究人员使用两个基因工程BCC小鼠模型来研究抑制Smoothened介导肿瘤消退的机制。研究人员发现,vismodegib通过抑制毛囊样命运和促进肿瘤细胞分化来介导BCC消退。

然而,一小部分肿瘤细胞持续存在,并且在治疗中止后导致肿瘤复发,与在人类中发现的情况类似。在小鼠和人BCC中,这种持续的,慢循环的肿瘤群体表达LGR5,并且以活性Wnt信号传导为特征。将Lgr5谱系消融或Wnt信号传导的抑制与vismodegib治疗相结合可导致BCC的彻底清除。

该研究结果表明,vismodegib通过促进肿瘤分化诱导肿瘤消退,并证明WntSmoothened抑制剂之间的协同作用是克服BCC肿瘤复发的潜在临床策略。


原始出处:

Sánchez-Danés A et al. A slow-cycling LGR5 tumour population mediates basal cell carcinoma relapse after therapyNATURE, 2018; DOI: 10.1038/s41586-018-0603-3


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