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Polymorphisms of H. pylori signaling pathway genes and gastric cancer risk in the European EPIC-eurgast cohort
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2014 (English)In: International Journal of Cancer, ISSN 0020-7136, E-ISSN 1097-0215, Vol. 134, no 1, 92-101 p.Article in journal (Refereed) Published
Abstract [en]

Helicobacter pylori is a recognized causal factor of noncardia gastric cancer (GC). Lipopolysaccaride and peptidoglycan of this bacterium are recognized by CD14, TLR4 and NOD2 human proteins, while NFKB1 activates the transcription of pro-inflammatory cytokines to elicit an immune response. SNPs in these genes have been associated with GC in different populations. We genotyped 30 SNPs of these genes, in 365 gastric adenocarcinomas and 1284 matched controls from the EPIC cohort. The association with GC and its histological and anatomical subtypes was analyzed by logistic regression and corrected for multiple comparisons. Using a log-additive model we found a significant association between SNPs in CD14, NOD2 and TLR4 with GC risk. However, after applying the multiple comparisons tests only the NOD2 region remained significant (p=0.009). Analysis according to anatomical subtypes revealed NOD2 and NFKB1 SNPs associated with noncardia GC and CD14 SNPs associated with cardia GC, while analysis according to histological subtypes showed that CD14 was associated with intestinal but not diffuse GC. The multiple comparisons tests confirmed the association of NOD2 with noncardia GC (p=0.0003) and CD14 with cardia GC (p=0.01). Haplotype analysis was in agreement with single SNP results for NOD2 and CD14 genes. From these results we conclude that genetic variation in NOD2 associates with noncardia GC while variation in CD14 is associated with cardia GC.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2014. Vol. 134, no 1, 92-101 p.
Keyword [en]
gastric cancer, genetic susceptibility, Helicobacter pylori, NOD2, CD14
National Category
Cancer and Oncology Surgery
URN: urn:nbn:se:umu:diva-76659DOI: 10.1002/ijc.28357ISI: 000325982000010PubMedID: 23824692OAI: diva2:636345

Article first published online: 13 Aug 2013

Available from: 2013-07-09 Created: 2013-07-09 Last updated: 2016-03-07Bibliographically approved

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Johansson, MattiasSund, Malin
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Department of Biobank ResearchSurgery
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