Potential Role of the Microbiome in Barrett’s Esophagus and Esophageal Adenocarcinoma
2016
Esophageal adenocarcinoma and its precursor Barrett’s esophagus have been rapidly increasing in incidence for half a century, for reasons not adequately explained by currently identified risk factors such as gastroesophageal reflux disease and obesity. The upper gastrointestinal microbiome may represent another potential cofactor. The distal esophagus has a distinct microbiome of predominantly oral-derived flora, which is altered in Barrett’s esophagus and reflux esophagitis. Chronic low-grade inflammation or direct carcinogenesis from this altered microbiome may combine with known risk factors to promote Barrett’s metaplasia and progression to adenocarcinoma.
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