Fully accessible fitness landscape of oncogene-negative lung adenocarcinoma.
Fully accessible fitness landscape of oncogene-negative lung adenocarcinoma.
复制标题
癌基因阴性肺腺癌的完全可访问的健身景观。
DOI：
10.1073/pnas.2303224120
复制
发表时间：
2023
影响因子：
11.1
通讯作者：
Boross,Gábor
中科院分区：
文献类型：
--
作者：
Yousefi,Maryam;Andrejka,Laura;Szamecz,Márton;Winslow,MonteM;Petrov,DmitriA;Boross,Gábor
Cancer genomes are almost invariably complex with genomic alterations cooperating during each step of carcinogenesis. In cancers that lack a single dominant oncogene mutation, cooperation between the inactivation of multiple tumor suppressor genes can drive tumor initiation and growth. Here, we shed light on how the sequential acquisition of genomic alterations generates oncogene-negative lung tumors. We couple tumor barcoding with combinatorial and multiplexed somatic genome editing to characterize the fitness landscapes of three tumor suppressor genes NF1, RASA1, and PTEN, the inactivation of which jointly drives oncogene-negative lung adenocarcinoma initiation and growth. The fitness landscape was surprisingly accessible, with each additional mutation leading to growth advantage. Furthermore, the fitness landscapes remained fully accessible across backgrounds with the inactivation of additional tumor suppressor genes. These results suggest that while predicting cancer evolution will be challenging, acquiring the multiple alterations that drive the growth of oncogene-negative tumors can be facilitated by the lack of constraints on mutational order.
