Zeng Yuchen, Lv Wei, Tao Huiying, Li Conghui, Jiang Shiqi, Liang Yuan, Chen Chen, Yu Tianxi, Li Yue, Wu Shuang, Cui Xin, Liang Ning, Wang Ping, Xu Huixin, Dong Jingjing, Teng Huajing, Chen Ke, Mu Kai, Fan Tianda, Cen Xiaoping, Xu Zhe, Zhu Ming, Wang Wenting, Mi Jia, Xiang Xi, Dong Wei, Yang Huanming, Bolund Lars, Lin Lin, Song Jinzhao, Song Xicheng, Luo Yonglun, Lin Chunhua, Han Peng
School of Life Sciences, Faculty of Medicine, Tianjin University, Tianjin 300072, China.
HIM-BGI Omics Center, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China.
iScience. 2024 Dec 2;28(1):111510. doi: 10.1016/j.isci.2024.111510. eCollection 2025 Jan 17.
Chromothripsis, a hallmark of cancer, is characterized by extensive and localized DNA rearrangements involving one or a few chromosomes. However, its genome-wide frequency and characteristics in urothelial carcinoma (UC) remain largely unknown. Here, by analyzing single-regional and multi-regional whole-genome sequencing (WGS), we present the chromothripsis blueprint in 488 UC patients. Chromothripsis events exhibit significant intertumoral heterogeneity, being detected in 41% of UC patients, with an increase from 30% in non-muscle-invasive disease (Ta/1) to 53% in muscle-invasive disease (T2-4). The presence of chromothripsis correlates with an unstable cancer genome and poor clinical outcomes. Analysis of multi-regional WGS data from 52 patients revealed pronounced intratumoral heterogeneity with chromothripsis events detectable only in specific tumor regions rather than uniformly across all areas. Chromothripsis events evolve under positive selection and contribute to tumor dissemination. This study presents a comprehensive genome-wide chromothripsis landscape in UC, highlighting the significance of chromothripsis in UC development.
染色体碎裂是癌症的一个标志,其特征是涉及一条或几条染色体的广泛且局部的DNA重排。然而,其在尿路上皮癌(UC)中的全基因组频率和特征仍 largely未知。在这里,通过分析单区域和多区域全基因组测序(WGS),我们展示了488例UC患者的染色体碎裂蓝图。染色体碎裂事件表现出显著的肿瘤间异质性,在41%的UC患者中被检测到,从非肌层浸润性疾病(Ta/1)中的30%增加到肌层浸润性疾病(T2-4)中的53%。染色体碎裂的存在与不稳定的癌症基因组和不良临床结果相关。对52例患者的多区域WGS数据进行分析显示,肿瘤内存在明显的异质性,染色体碎裂事件仅在特定肿瘤区域可检测到,而非在所有区域均匀分布。染色体碎裂事件在正选择下进化,并促进肿瘤播散。这项研究展示了UC中全面的全基因组染色体碎裂图谱,突出了染色体碎裂在UC发展中的重要性。