Ontology highlight
ABSTRACT: Background
Cholangiocarcinoma (CCA) is a diverse group of malignancies arising from the intra- or extrahepatic biliary epithelium and characterized by its late diagnosis and fatal outcome. Extrahepatic cholangiocarcinoma (ECC) accounts for 90% of CCA. However, little is known about the comprehensive genomic alterations of ECC in Chinese population for providing clinical managements especially targeted therapy.Methods
Comprehensive genomic profiling (CGP) was performed with next generation sequencing panel on paraffin-embedded tumor from a cohort of 80 Chinese ECC patients.Results
The most frequently altered genes were TP53 (68%), KRAS (46%), SMAD4 (22%), ARID1A (20%) and CDKN2A (19%). Mutual exclusivity was observed between multiple genes including ARID1A:TP53, KRAS:LRP1B and NF2:TP53. Genetic alterations with potential therapeutic implications were identified in 43% of patients. The top three actionable alterations include CDKN2A (n=11), BRAF (n=5) and ERBB2 (n=4). Potentially actionable alterations were mainly enriched in the G1-S transition, homologous recombination repair, MAPK/ERK pathway.Conclusions
This is the largest data set of ECC cases providing a comprehensive view on genetic alterations in Chinese population which differs significantly from a US cohort, and indicates the potential clinical implications for targeted therapies.
SUBMITTER: Xue L
PROVIDER: S-EPMC6943002 | biostudies-literature | 2019 Dec
REPOSITORIES: biostudies-literature
Xue Liang L Guo Chao C Zhang Kang K Jiang Hang H Pang Fei F Dou Ying Y Liu Xiaoyan X Lin Hanqing H Dong Xiaowei X Zhao Songhui S Yao Ming M Wang Kai K Feng Yujie Y Gu Weiguang W
Hepatobiliary surgery and nutrition 20191201 6
<h4>Background</h4>Cholangiocarcinoma (CCA) is a diverse group of malignancies arising from the intra- or extrahepatic biliary epithelium and characterized by its late diagnosis and fatal outcome. Extrahepatic cholangiocarcinoma (ECC) accounts for 90% of CCA. However, little is known about the comprehensive genomic alterations of ECC in Chinese population for providing clinical managements especially targeted therapy.<h4>Methods</h4>Comprehensive genomic profiling (CGP) was performed with next g ...[more]