Parvizi S, Mohammadzadeh G, Karimi M, Noorbehbahani M, Jafary A. Effects of Two Common Promoter Polymorphisms of Transforming Growth Factor-β1 on Breast Cancer Risks in Ahvaz, West South of Iran.
IRANIAN JOURNAL OF CANCER PREVENTION 2016;
9:e5266. [PMID:
27366314 PMCID:
PMC4922207 DOI:
10.17795/ijcp-5266]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 01/27/2016] [Indexed: 11/25/2022]
Abstract
BACKGROUND
Transforming growth factor-β1 (TGF-β1) has a critical role in breast cancer initiation and progression.
OBJECTIVES
We have investigated the possible differences in two promoter polymorphisms (-509C/T and -800G/A) of TGF-β1 gene between breast cancer cases and controls.
PATIENTS AND METHODS
A total of 100 patients with confirmed breast cancer and 100 subjects without breast cancer was selected. Two promoter polymorphisms (-509C/T and -800G/A) of TGF-β1 gene were genotyped using PCR-based restriction fragment length polymorphism (RFLP) method.
RESULTS
The allele frequencies were 63% for C allele and 37% for T allele of SNP -509C/T and 66% for G allele and 34% for A allele of SNP -800G/A. Although no significant difference has observed between two groups, according to the genotype distribution, However, the TT genotype of -509 and AA genotype of -800 was significantly associated with breast cancer risk [odds ratio (OR) = 2.409; 95% confidence interval (CI) = 1.087 - 5.337, P = 0.030; and OR = 2.383; CI = 1.039 - 5.40, P = 0.040, respectively]. In addition, a multinomial logistic regression model shown, homozygous of -800 G/A (OR = 0.570; 95% CI = 0.362 - 0.896, P = 0.015); and HDL-C (OR = 0.935; 95% CI = 0.906 - 0.965, P < 0.001) were the selected variables associated with the presence of breast cancer. Haplotype analysis has shown no significant association between TGF-β1 haplotypes and breast cancer risk.
CONCLUSIONS
Our results indicated that among two promoter polymorphisms of the TGF-β1gene, -800G/A compared to -509C/T is more associated with breast cancer.
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