An association between the allele coding for a low activity variant of catechol-O-methyltransferase and the risk for breast cancer

Jackie A. Lavigne, Kathy J. Helzlsouer, Han Yao Huang, Paul T. Strickland, Douglas A. Bell, Ornella Selmin, Mary A. Watson, Sandra Hoffman, George W. Comstock, James D. Yager

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251 Scopus citations

Abstract

Mounting evidence suggests that catechol metabolites of estradiol may contribute to the development of estrogen-induced cancers. O-Methylation, catalyzed by catechol-O-methyltransferase (COMT), inactivates catechol estrogens. COMT is polymorphic in the human population, with 25% of Caucasians being homozygous for a low activity allele of the enzyme (COMT(LL)). We hypothesized that low activity COMT may be a risk factor for human breast cancer and designed a PCR-based RFLP assay to determine COMT genotype in a cohort of 112 matched, nested case-control samples. In the total study population, the odds ratios for the association of breast cancer risk with COMT(HL) and COMT(LL) genotypes were 1.30 [confidence interval (CI), 0.66-2.58] and 1.45 (CI, 0.69-3.07), respectively. Postmenopausal COMT(LL) women had a greater than 2-fold increased risk of developing breast cancer [odds ratio (OR), 2.18; CI, 0.93-5.11]. The association of COMT(LL) with the development of postmenopausal breast cancer was stronger and statistically significant in those women with a body mass index >24.47 kg/m2 (OR, 3.58; CI, 1.07-11.98). When COMT(LL) was combined with either glutathione S-transferase (GST) M1 null or with GSTP1 Ile-105-Val/Val-105- Val (intermediate/low activity, respectively) genotypes, the risk for developing postmenopausal breast cancer was also significantly increased. Our findings suggest that the allele encoding low activity COMT may be an important contributor to the postmenopausal development of breast cancer in certain women.

Original languageEnglish (US)
Pages (from-to)5493-5497
Number of pages5
JournalCancer Research
Volume57
Issue number24
StatePublished - Dec 15 1997
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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    Lavigne, J. A., Helzlsouer, K. J., Huang, H. Y., Strickland, P. T., Bell, D. A., Selmin, O., Watson, M. A., Hoffman, S., Comstock, G. W., & Yager, J. D. (1997). An association between the allele coding for a low activity variant of catechol-O-methyltransferase and the risk for breast cancer. Cancer Research, 57(24), 5493-5497.