Abstract
Background & Aims
Barrett's esophagus (BE) increases the risk of esophageal adenocarcinoma (EAC). We found the risk to be BE has been associated with single nucleotide polymorphisms (SNPs) on chromosome 6p21 (within the HLA region) and on 16q23, where the closest protein-coding gene is FOXF1. Subsequently, the Barrett's and Esophageal Adenocarcinoma Consortium (BEACON) identified risk loci for BE and esophageal adenocarcinoma near CRTC1 and BARX1, and within 100 kb of FOXP1. We aimed to identify further SNPs that increased BE risk and to validate previously reported associations.
Methods
We performed a genome-wide association study (GWAS) to identify variants associated with BE and further analyzed promising variants identified by BEACON by genotyping 10,158 patients with BE and 21,062 controls.
Results
We identified 2 SNPs not previously associated with BE: rs3072 (2p24.1; odds ratio [OR] = 1.14; 95% CI: 1.09–1.18; P = 1.8 × 10−11) and rs2701108 (12q24.21; OR = 0.90; 95% CI: 0.86–0.93; P = 7.5 × 10−9). The closest protein-coding genes were respectively GDF7 (rs3072), which encodes a ligand in the bone morphogenetic protein pathway, and TBX5 (rs2701108), which encodes a transcription factor that regulates esophageal and cardiac development. Our data also supported in BE cases 3 risk SNPs identified by BEACON (rs2687201, rs11789015, and rs10423674). Meta-analysis of all data identified another SNP associated with BE and esophageal adenocarcinoma: rs3784262, within ALDH1A2 (OR = 0.90; 95% CI: 0.87–0.93; P = 3.72 × 10−9).
Conclusions
We identified 2 loci associated with risk of BE and provided data to support a further locus. The genes we found to be associated with risk for BE encode transcription factors involved in thoracic, diaphragmatic, and esophageal development or proteins involved in the inflammatory response.
| Original language | English |
|---|---|
| Pages (from-to) | 367-378 |
| Journal | Gastroenterology |
| Volume | 148 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Feb 2015 |
| Externally published | Yes |
Bibliographical note
Open access funded by Wellcome Trust.Cancer Research UK Peninsula Schools of Medicine and Dentistry School Wellcome Trust AstraZeneca UK educational grant
Funder
Discovery Phase and Immunochip replication were funded by the Wellcome Trust IPOD grant (084722/Z/08/Z). In addition, sample collection for all phases was core supported by the Cancer Research UK funded AspECT, ChOPIN and Handel trials. CoRGI and GLACIER were also funded by Cancer Research UK.UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
Keywords
- EAC
- Intestinal Metaplasia
- Susceptibility
- Cancer
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