Carcinogenesis Advance Access published online on October 27, 2006
Carcinogenesis, doi:10.1093/carcin/bgl198
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1 Section on Genomic Variation, Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland
* To whom correspondence should be addressed. Common genetic variants in cancer-related genes contribute to breast cancer. Since the innate immune system plays a crucial role in the immune surveillance against malignancies, it is plausible that genetic variations in key genes of the innate immunity such as the mannose binding lectin, MBL2, could influence the risk for breast cancer. We investigated the association of MBL2 genotypes with breast cancer and conducted a comprehensive genotype and haplotype analysis of 26 MBL2 single nucleotide polymorphisms (SNPs) in a case control study of breast cancer (166 African American case patients versus 180 controls and 127 Caucasian case patients versus 137 controls). We observed that the A allele of the 3' UTR SNP Ex4-1067 (NCBI SNP ID: rs10824792) was significantly associated with a decreased disease risk in African American women [Odds ratio (OR) 0.47, 95% confidence interval (CI) 0.27 - 0.81]. Haplotype analysis of MBL2 showed that the frequency of the corresponding 3' haplotype TATAAC (Ex4-1483, Ex4-1067, Ex4-1047, Ex4-901, Ex4-710, 3238bp 3' STP) was lower in cases than controls among AA women (0.15 versus 0.21; p = 0.02) suggesting a protective effect after adjusting for covariates (OR 0.51, 95% CI 0.29-0.88, p = 0.018). In conclusion, this study presents preliminary evidence that common genetic variants in the 3' UTR of MBL2 might influence the risk for breast cancer in African American women, probably in interaction with the 5' secretor haplotypes that are associated with high concentrations of mannose binding lectin.
Received May 20, 2006
Revised October 10, 2006
Accepted October 11, 2006
MOLECULAR EPIDEMIOLOGY AND CANCER PREVENTION
The mannose-binding lectin (MBL2) haplotype and breast cancer: an association study in African American and Caucasian women
Toralf Bernig 1, Brenda J. Boersma 2, Tiffany M. Howe 2, Robert Welch 3, Sunita Yadavalli 3, Brian Staats 3, Leah E. Mechanic 2, Stephen J. Chanock 1, and Stefan Ambs 2 *
2 Laboratory of Human Carcinogenesis, CCR, NCI, NIH, Bethesda, Maryland
3 Core Genotyping Facility, NCI, NIH, Bethesda, Maryland
Stefan Ambs, E-mail: ambss{at}mail.nih.gov
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