Whole genome methylation analysis of nondysplastic Barrett esophagus that progresses to invasive cancer

Research output: Contribution to journalArticle

Authors

  • Mark P Dilworth
  • Tom Nieto
  • Jo D Stockton
  • Louise Tee
  • Jonathan D James
  • Fergus Noble
  • Tim J Underwood
  • Michael T Hallissey
  • Rahul Hejmadi
  • Nigel Trudgill
  • Olga Tucker

Colleges, School and Institutes

External organisations

  • Institute of Cancer and Genomic Science, University of Birmingham, UK.
  • Faculty of Medicine, Cancer Sciences Academic Unit, University of Southampton, Southampton SO16 6YD, UK.
  • Medical Physics, Queen Elizabeth Hospital, Queen Elizabeth Medical Centre, Birmingham
  • Sandwell and West Birmingham Hospitals NHS Trust
  • Birmingham Heart England NHS Trust

Abstract

OBJECTIVE: To investigate differences in methylation between patients with nondysplastic Barrett esophagus who progress to invasive adenocarcinoma and those who do not.

BACKGROUND: Identifying patients with nondysplastic Barrett esophagus who progress to invasive adenocarcinoma remains a challenge. Previous studies have demonstrated the potential utility of epigenetic markers for identifying this group.

METHODS: A whole genome methylation interrogation using the Illumina HumanMethylation 450 array of patients with nondysplastic Barrett esophagus who either develop adenocarcinoma or remain static, with validation of findings by bisulfite pyrosequencing.

RESULTS: In all, 12 patients with "progressive" versus 12 with "nonprogressive" nondysplastic Barrett esophagus were analyzed via methylation array. Forty-four methylation markers were identified that may be able to discriminate between nondysplastic Barrett esophagus that either progress to adenocarcinoma or remain static. Hypomethylation of the recently identified tumor suppressor OR3A4 (probe cg09890332) validated in a separate cohort of samples (median methylation in progressors 67.8% vs 96.7% in nonprogressors; P = 0.0001, z = 3.85, Wilcoxon rank-sum test) and was associated with the progression to adenocarcinoma. There were no differences in copy number between the 2 groups, but a global trend towards hypomethylation in the progressor group was observed.

CONCLUSION: Hypomethylation of OR3A4 has the ability to risk stratify the patient with nondysplastic Barrett esophagus and may form the basis of a future surveillance program.

Details

Original languageEnglish
Pages (from-to)479–485
Number of pages7
JournalAnnals of surgery
Volume269
Issue number3
Early online date30 Jan 2018
Publication statusPublished - 1 Mar 2019

Keywords

  • Barrett esophagus, cancer genetics, esophageal cancer, methylation

ASJC Scopus subject areas