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HPV status and mutation analysis using multiparallel sequencing in distal oesophageal and gastro-oesophageal junction adenocarcinomas

M. Vošmik, H. Vošmiková, K. Sieglová, I. Sirák, J. Laco, A. Ryška, J. Petera, B. Melichar, R. Soumarová

. 2018 ; 64 (2) : 41-45.

Language English Country Czech Republic

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc19005383

The incidence of adenocarcinoma of oesophagus or gastro-oesophageal junction is increasing in Europe and other regions of the Western world. Research of possible causes has shifted to the molecular level. This study evaluated human papillomavirus (HPV) using real-time PCR and mutational status of selected genes using the multiparallel sequencing method (NGS) in DNA extracted from paraffin-embedded tumour tissue of 56 patients with oesophageal or gastro-oesophageal junction adenocarcinoma. The genetic material was in sufficient quality for the analysis in 37 cases (66 %). No HPV-positive sample was found. NGS revealed higher frequency of mutations in TP53, ARID1A, PIK3CA, SMAD4, ERBB2, MSH6, BRCA2, and RET genes. Association between gene mutations and histological grade, subtype according to Lauren, or primary tumour site was not statistically significant. In conclusion, the study did not confirm any HPV-positive sample of oesophageal and gastro-oesophageal junction adenocarcinoma. The study confirmed the usefulness of NGS analysis of paraffin-embedded tissue of these tumours, and it could be used in clinical studies to evaluate the prognostic and/or predictive value of the tested mutations. The association between gene mutations and histological features should be tested in larger patient cohorts.

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