Chi Chiung Grace Chen

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EGFR L858R mutation and polymorphisms of genes related to estrogen biosynthesis and metabolism in never-smoking female lung adenocarcinoma patients.

Shi-Yi Yang; Tsung-Ying Yang; Kun-Chieh Chen; Yao-Jen Li; Kuo-Hsuan Hsu; Chi-Rne Tsai; Chih-Yi Chen; Chung-Ping Hsu; Jiun-Yi Hsia; Cheng-Yen Chuang; et al. (Profiled Author: Chi Chiung Grace Chen)

Genomics Research Center, College of Public Health, National Taiwan University, Taipei, Taiwan.
Clinical cancer research : an official journal of the American Association for Cancer Research 2011;17(8):2149-58.

PURPOSE: To assess whether polymorphisms of genes related to estrogen biosynthesis and metabolism are associated with EGFR mutations. EXPERIMENTAL DESIGN: We studied 617 patients with lung adenocarcinoma, including 302 never-smoking women. On the basis of multiple candidate genes approach, the effects of polymorphisms of CYP17, CYP19A1, ERα, and COMT in association with the occurrence of EGFR mutations were evaluated using logistic regression analysis. RESULTS: In female never-smokers, significant associations with EGFR L858R mutation were found for the tetranucleotide (TTTA)(n) repeats in CYP19A1 (odds ratio, 2.6; 95%CI, 1.2-5.7 for 1 or 2 alleles with (TTTA)(n) repeats >7 compared with both alleles with (TTTA)(n) repeats ≤ 7), and the rs2234693 in ERα (OR, 2.1; 95% CI, 1.1-4.0 for C/T and C/C genotypes compared with T/T genotype). The C/C genotype (vs. T/T genotype) of ERα was significantly associated with EGFR L858R mutation (OR, 3.0; 95% CI, 1.1-8.1), in-frame deletion (OR, 2.9; 95% CI, 1.1-7.6) and other mutations (OR, 4.3; 95% CI, 1.3-14.0). The genotype of COMT rs4680 was significantly associated with EGFR L858R mutation in female and male never-smokers showing OR's (95% CI) of 1.8 (1.0-3.2) and 3.6 (1.1-11.3), respectively, for genotypes G/A and G/G compared with genotype A/A. The number of risk alleles of CYP17, CYP19A1, ERα, and COMT was associated with an increasing OR of EGFR L858R mutation in female never-smokers (P = 0.0002 for trend). CONCLUSIONS: The L858R mutation of EGFR is associated with polymorphisms of genes related to estrogen biosynthesis and metabolism in never-smoking female lung adenocarcinoma patients.

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