Interferon-gamma gene dinucleotide (CA) repeat and interleukin-4 promoter region (-590C/T) polymorphisms in Japanese patients with endometriosis

Jo Kitawaki, Kitawaki J, Koshiba H, Hisato Koshiba, Yui Kitaoka, Kitaoka Y, Mariko Teramoto, Teramoto M, Goji Hasegawa, Hasegawa G, Nakamura N, Naoto Nakamura, Toshikazu Yoshikawa, Yoshikawa T, Ohta M, Mitsuhiro Ohta, Hiroshi Obayashi, Obayashi H, Hideo Honjo, Honjo H
Human Reproduction · 2004 · vol. 19(8) , pp. 1765–1769 · doi:10.1093/humrep/deh337 · PMID:15166131 · W2146810511
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The interferon-gamma CA-repeat polymorphism, specifically the a13 allele, was found to be associated with increased susceptibility to endometriosis in Japanese patients.

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Abstract

BACKGROUND: Endometriosis is a multifactorial disease with possible genetic predisposition and involvement of environmental factors in its pathogenesis. Cytokines may play important roles in the pathogenesis of endometriosis. The aim of this study was to investigate whether the interferon-gamma gene (IFNG) CA-repeat and interleukin-4 (IL-4) promoter region (-590C/T) polymorphisms may be responsible in part for genetic susceptibility to endometriosis. METHODS: IFNG CA-repeat and IL-4 -590C/T polymorphisms were determined for 185 patients with endometriosis and 176 healthy fertile women by quantitative genescan technology and PCR-restriction fragment length polymorphism analysis, respectively. Patients with endometriosis were analysed further according to their stage of disease, the presence or absence of chocolate cysts and whether or not their disease was associated with adenomyosis and/or lyomyomata. RESULTS: The global IFNG allele frequencies in the patients with endometriosis were significantly different from those in the control women (chi2 = 12.964, 6 df, P = 0.0436). The difference was due to an increase of the a13 (114 bp) allele in patients with endometriosis (chi2 = 10.222, P = 0.0088, corrected P = 0.0352, odds ratio = 1.48, 95% confidence interval = 1.10-1.98). There were no differences in IL-4 -590C/T genotypes and allele frequencies between control women and all patients with endometriosis or between control women and each subgroup of patients with endometriosis. CONCLUSION: The results suggest that the IFNG CA-repeat polymorphism is associated with susceptibility to endometriosis in a Japanese population.

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Condition tags

endometriosisadenomyosis

MeSH descriptors

Endometriosis Interferon-gamma Interleukin-4 Polymorphism, Genetic Polymorphism, Genetic Adult Adult Dinucleotide Repeats Dinucleotide Repeats Endometriosis Endometriosis Endometriosis Female Female Gene Frequency Gene Frequency Genetic Predisposition to Disease Genetic Predisposition to Disease Genotype Genotype

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References (23)

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