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Polymorphisms in one-carbon metabolism and trans-sulfuration pathway genes and susceptibility to bladder cancer
- Source :
- International journal of cancer. 120(11)
- Publication Year :
- 2007
-
Abstract
- We have previously reported significant inverse associations between bladder cancer risk and dietary intake of vitamins B2, B6, B12, folate and protein in a hospital-based bladder cancer case-control study conducted in Spain (1,150 cases;1,149 controls). Because these dietary factors are involved in the one-carbon metabolism pathway, we evaluated associations between bladder cancer risk and 33 single nucleotide polymorphisms (SNPs) in 8 genes (CBS, CTH, MTHFR, MTR, MTRR, SHMT1, SLC19A1 and TYMS) and interactions with dietary variables involved in this pathway. Two SNPs in the CTH gene were significantly associated with bladder cancer risk. OR (95% CI) for heterozygous and the homozygous variants compared to homozygous wild-type individuals were: 1.37 (1.04-1.80) IVS3-66 A > C and 1.22 (1.02-1.45) IVS10-430 C > T. Because the CTH gene is important for glutathione synthesis, we examined interactions with the GSTM1 gene, which codes for glutathione S-transferase muu. Increased risk for individuals with the IVS10-430 CT or TT genotype was limited to those with the GSTM1 null genotype (p-interaction = 0.02). No other SNPs were associated with risk of bladder cancer. These findings suggest that common genetic variants in the one-carbon pathway may not play an important role in the etiology of bladder cancer. However, our results provide some evidence that variation in glutathione synthesis may contribute to risk, particularly among individuals who carry a deletion in GSTM1. Additional work is needed to comprehensively evaluate genomic variation in CTH and related genes in the trans-sulfuration pathway and bladder cancer risk.
- Subjects :
- Adult
Male
Cancer Research
Single-nucleotide polymorphism
Biology
Polymorphism (computer science)
Risk Factors
Genotype
medicine
Genetic predisposition
Humans
Genetic Predisposition to Disease
Risk factor
Aged
Genetics
Aged, 80 and over
Bladder cancer
Polymorphism, Genetic
Middle Aged
medicine.disease
MTRR
Carbon
Oncology
Urinary Bladder Neoplasms
Methylenetetrahydrofolate reductase
biology.protein
Female
Sulfur
Subjects
Details
- ISSN :
- 00207136
- Volume :
- 120
- Issue :
- 11
- Database :
- OpenAIRE
- Journal :
- International journal of cancer
- Accession number :
- edsair.doi.dedup.....dabadff0aea465a7d9b33739371a8917