Mutational signatures and processes in hepatobiliary cancers

Area of Science:

• Genomics
• Cancer Biology
• Molecular Oncology

Background:

• Hepatobiliary cancers exhibit significant clinical heterogeneity.
• Somatic mutations within cancer genomes provide clues to tumorigenesis.
• Mutational signatures reflect DNA damage and repair mechanisms.

Purpose of the Study:

• To analyze somatic mutations and their genomic context in hepatobiliary cancers.
• To infer the mechanisms driving tumorigenesis in these malignancies.
• To understand the origins of inter- and intra-tumoral heterogeneity.

Main Methods:

• Genomic analysis of thousands of patients with hepatobiliary cancers.
• Cataloguing somatic mutations and their DNA sequence context.
• Identifying and characterizing mutational signatures.

Main Results:

• Genomic analysis revealed diverse mutagenic processes in hepatobiliary cancers.
• Mutational signatures contribute significantly to cancer heterogeneity.
• A notable proportion of signatures in hepatocellular carcinoma and biliary tract cancer remain of unknown origin.

Conclusions:

• Mutational signatures are key to understanding hepatobiliary cancer evolution.
• Exploiting these signatures can advance cancer prevention strategies.
• Retrospective analysis may predict treatment response and guide novel therapies.