Published in:
Open Access
01-12-2008 | Research article
A novel diffuse gastric cancer susceptibility variant in E-cadherin (CDH1) intron 2: A case control study in an Italian population
Authors:
Soroush Nasri, Helen More, Francesco Graziano, Annamaria Ruzzo, Emily Wilson, Anita Dunbier, Cushla McKinney, Tony Merriman, Parry Guilford, Mauro Magnani, Bostjan Humar
Published in:
BMC Cancer
|
Issue 1/2008
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Abstract
Background
Inherited genetic factors such as E-cadherin (CDH1) promoter variants are believed to influence the risk towards sporadic diffuse gastric cancer (DGC). Recently, a new regulatory region essential for CDH1 transcription has been identified in CDH1 intron 2.
Methods
We genotyped all known polymorphisms located within conserved sequences of CDH1 intron 2 (rs10673765, rs9932686, rs1125557, rs9282650, rs9931853) in an Italian population consisting of 134 DGC cases and 100 healthy controls (55 patient relatives and 45 unrelated, matched individuals). The influence of individual variants on DGC risk was assessed using χ2-tests and logistic regression. The relative contribution of alleles was estimated by haplotype analysis.
Results
We observed a significant (p < 0.0004) association of the CDH1 163+37235G>A variant (rs1125557) with DGC risk. Odds ratios were 4.55 (95%CI = 2.09–9.93) and 1.38 (95%CI = 0.75–2.55) for AA and GA carriers, respectively. When adjusted for age, sex, smoking status, alcohol intake and H. pylori infection, the risk estimates remained largely significant for AA carriers. Haplotype analysis suggested the 163+37235A-allele contributes to disease risk independently of the other variants studied.
Conclusion
The CDH1 163+37235G>A polymorphism may represent a novel susceptibility variant for sporadic DGC if confirmed in other populations. Considering the broad expression of E-cadherin in epithelia, this exploratory study encourages further evaluation of the 163+37235A-allele as a susceptibility variant in other carcinomas.