About the Cover: The Thailand Initiative in Genomics and Expression Research for Liver Cancer (TIGER-LC) Consortium (depicted as a tiger) emerges from foliage, representing molecular, clinical, and epidemiological studies from teams in the United States, Thailand, and Japan, to generate a multilayered genomic and genetic liver cancer data ecosystem (represented by the tiger’s tail). Although common molecular subtypes (depicted as bamboo stalks) are observed among liver cancer types, there are differences observed between Asian and Caucasian populations (depicted by different bamboo colors). Cover art by Ethan Tyler.
Intrahepatic cholangiocarcinoma (ICC) and hepatocellular carcinoma (HCC) are clinically disparate primary liver cancers with etiological and biological heterogeneity. We identified common molecular subtypes linked to similar prognosis among 199 Thai ICC and HCC patients through systems integration of genomics, transcriptomics, and metabolomics. While ICC and HCC share recurrently mutated genes, including TP53, ARID1A, and ARID2, mitotic checkpoint anomalies distinguish the C1 subtype with key drivers PLK1 and ECT2, whereas the C2 subtype is linked to obesity, T cell infiltration, and bile acid metabolism. These molecular subtypes are found in 582 Asian, but less so in 265 Caucasian patients. Thus, Asian ICC and HCC, while clinically treated as separate entities, share common molecular subtypes with similar actionable drivers to improve precision therapy.
Common Molecular Subtypes Among Asian Hepatocellular Carcinoma and Cholangiocarcinoma.
Chaisaingmongkol J, Budhu A, Dang H, Rabibhadana S, Pupacdi B, Kwon SM, Forgues M, Pomyen Y, Bhudhisawasdi V, Lertprasertsuke N, Chotirosniramit A, Pairojkul C, Auewarakul CU, Sricharunrat T, Phornphutkul K, Sangrajrang S, Cam M, He P, Hewitt SM, Ylaya K, Wu X, Andersen JB, Thorgeirsson SS, Waterfall JJ, Zhu YJ, Walling J, Stevenson HS, Edelman D, Meltzer PS, Loffredo CA, Hama N, Shibata T, Wiltrout RH, Harris CC, Mahidol C, Ruchirawat M, Wang XW; TIGER-LC Consortium. Cancer Cell. 2017 Jul 10;32(1):57-70.