Transcriptomics

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High fat diet accelerates Barrett esophageal carcinogenesis by inducing a distinct IL-8 dependent immune reaction through alteration of the microbiome


ABSTRACT: Barrett Esophagus (BE) is a risk factor for the development of esophageal adenocarcinoma (EAC). As endemic obesity emerges as a risk factor for increasing numbers of EAC we utilized our IL-1b mouse model of BE to understand the impact of a high fat diet (HFD) on disease progression. Indeed, increased dysplasia development in HFD treated IL-1b mice correlated with an accelerated cytokine response with specific upregulation of IL-8 in esophageal tissue, which could be confirmed by specific overexpression of IL-8 in the BE mouse model. Consequently we observed an influx of immature myeloid cells and neutrophils resulting in a decrease of regulatory NK T cells. HFD led to a specific shift in the gut microbiome, similar to that in human BE patients, being responsible for a specific inflammatory phenotype with elevated IL-1b and IL-8 which could be eliminated under germ free conditions and lead to an increased influx of cardia (Lgr5) stem cells into the esophagus giving rise to dysplasia.

ORGANISM(S): Mus musculus

PROVIDER: GSE103616 | GEO | 2019/04/30

REPOSITORIES: GEO

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