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Impact of group IVA cytosolic phospholipase A 2 gene polymorphisms on phenotypic features of patients with familial adenomatous polyposis

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International Journal of Colorectal Disease Aims and scope Submit manuscript

Abstract

Objective

Group IVA cytosolic phospholipase A2 (cPLA2α) plays a key role in tumorigenesis via generating arachidonic acids as the substrate of cyclooxygenase. The aim of this study was to elucidate the possible associations between cPLA 2 α gene polymorphisms and phenotypic features of patients with familial adenomatous polyposis (FAP).

Patients and Methods

A tag single nucleotide polymorphisms (SNPs)-based genotype–phenotype association study of the cPLA 2 α gene was conducted in 73 Japanese patients from 59 families with FAP. Based on the HapMap database, seven tag SNPs of the cPLA 2 α gene were selected and genotyped by direct sequencing analysis. The genotype–phenotype association in relation to the adenomatous polyposis coli (APC) gene mutation was also assessed.

Results

The single SNP analysis showed that rs3820185 C allele [odds ratio (OR), 2.5; 95% confidence interval (CI), 1.2–4.9] and rs127446200 GG genotype (OR, 10.9; 95%CI, 1.6–69.8), were more frequent in patients with gastric fundic gland polyposis (FGP) than in those without. Rs12749354 C allele was more frequently found in patients with small intestinal adenoma (OR, 7.0; 95% CI, 1.5–30.4; p = 0.008). This association was also significant when adjusted for covariates (age, sex, and APC mutation) in a logistic regression analysis (adjusted OR, 7.4; 95% CI, 1.2–64.2; p = 0.027).

Conclusions

The cPLA 2 α gene may be a possible disease modifier gene in FAP.

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Acknowledgements

The authors would like to thank Brian Quinn for editing the manuscript.

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Correspondence to Junji Umeno.

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Umeno, J., Matsumoto, T., Esaki, M. et al. Impact of group IVA cytosolic phospholipase A 2 gene polymorphisms on phenotypic features of patients with familial adenomatous polyposis. Int J Colorectal Dis 25, 293–301 (2010). https://doi.org/10.1007/s00384-009-0808-x

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  • DOI: https://doi.org/10.1007/s00384-009-0808-x

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