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Association of CDH1 haplotypes with susceptibility to sporadic diffuse gastric cancer

Abstract

Truncating mutations in the gene for the cell to cell adhesion protein E-cadherin are the most consistent genetic alterations observed in sporadic and hereditary diffuse gastric cancer (DGC). In addition to these inactivating mutations, a CDH1 promoter polymorphism at position −160 has been reported to lead to transcriptional downregulation of the gene in vitro. We therefore performed a case–control study to investigate whether this variant is associated with an increased susceptibility to DGC. The frequency of the −160A allele was significantly higher (P<0.005) in 53 diffuse gastric cancer cases compared to 70 matched controls. The odds ratio associated with the A-allele was 2.27 for CA-heterozygotes (95%CI 1.16–4.44) and 7.84 for AA-homozygotes (95%CI 2.89–21.24). Two additional polymorphisms (the 48+6T→C and the 2076C→T variant) were genotyped and shown to be equally distributed among cases and controls. Haplotype analysis with the three polymorphisms confirmed an association with disease (P<0.004). However, this analysis suggested the −160C→A CDH1 promoter polymorphism may be in linkage disequilibrium with a distinct aetiological locus or acts in combination with other functional variants in or near the CDH1 region.

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Acknowledgements

We thank all the patients and volunteers who contributed to this study. We also thank Natalie J Kerr and Anita Dunbier for critical reading of the manuscript. B Humar was supported by a grant from the Swiss Cancer League (BIL SKL 993-02-2000) and the Swiss National Foundation.

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Correspondence to Parry Guilford.

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Humar, B., Graziano, F., Cascinu, S. et al. Association of CDH1 haplotypes with susceptibility to sporadic diffuse gastric cancer. Oncogene 21, 8192–8195 (2002). https://doi.org/10.1038/sj.onc.1205921

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