Abstract
Purpose Pancreatic adenocarcinoma (PAC) is the 8th leading cause of cancer-related death in Taiwan, and its incidence is increasing. The development of PAC involves successive accumulation of multiple genetic alternations. Understanding the molecular pathogenesis and heterogeneity of PAC may facilitate personalized treatment for PAC and identify therapeutic agents.Materials and Methods We performed next-generation sequencing (NGS) with targeted panels to explore the molecular changes underlying PAC in Taiwan. The Ion Torrent Oncomine Comprehensive Panel (OCP) was used for PAC metastatic lesions, and more PAC samples were sequenced with the Ion AmpliSeq Cancer Hot Spot (CHP) v2 panel.ResultsFive fresh-frozen paraffin-embedded (FFPE) specimens were successfully assayed with the OCP, and KRAS was the most prevalent alternation, which might contraindicate the use of anti-EGFR therapy. One PAC patient harbored a FGFR2 p.C382R mutation, who might derive benefit from FGFR tyrosine kinase inhibitor. Additional 38 samples assayed with CHP v2 showed 113 hotspot variants, corresponding to 54 COSMID IDs. The most frequently mutated genes were TP53, KRAS, HRAS, and PDGFRA, (29, 23, 14, 10 hotspot variants), impacting 11, 23, 14, and 10 PAC patients. Highly pathogenic variants including COSM22413 (PDGFRA, FATHMM predicted score: 0.88), COSM520, COSM521, COSM518 (KRAS, FATHMM predicted score: 0.98) were reported.ConclusionsBy using NGS with targeted panel, somatic mutations with therapeutic potential were identified. The combination of clinical and genetic information is useful for decision making and precise selection of targeted medicine.