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Polymorphisms in GSTP1, GSTM1, and GSTT1 and susceptibility to colorectal cancer

Lookup NU author(s): Professor Margaret Bassendine, Professor Ann DalyORCiD


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Polymorphisms in glutathione S-transferases (GSTs) may predispose to colorectal cancer through deficient detoxification of environmental carcinogens, although previous results are conflicting. A study with 178 matched case-control pairs was conducted to determine the effect of the GSTT1 and GSTM1 null genotypes and polymorphisms in GSTP1 on colorectal cancer susceptibility. In a secondary analysis, we examined interactions between genotypes and with the N-acetyltransferase 2 (NAT2) genotype. Heterogeneity by age, sex, site, and stage of cancer was also examined. No effect of any genotype for GSTM1, GSTT1, or GSTP1 on colorectal cancer susceptibility was detected. Secondary end points showed that individuals with both the GSTT1 null and NAT2 slow genotypes combined appeared to be at increased risk of colorectal cancer (odds ratio = 2.33; 95% confidence interval, 1.1-5.0). We conclude that GST polymorphisms alone do not predispose to colorectal cancer in northeast England. We also observed possible effects of the GSTT1 null genotype on the age and stage at presentation, and these, together with the findings of an apparent interaction with NAT2 genotypes, need to be confirmed in further studies.

Publication metadata

Author(s): Welfare M, Adeokun AM, Bassendine MF, Daly AK

Publication type: Article

Publication status: Published

Journal: Cancer Epidemiology Biomarkers and Prevention

Year: 1999

Volume: 8

Issue: 4

Pages: 289-292

Print publication date: 01/04/1999

ISSN (print): 1055-9965

ISSN (electronic): 1538-7755

Publisher: American Association for Cancer Research

PubMed id: 10207630