Journal Article

Comprehensive Evaluation of One-Carbon Metabolism Pathway Gene Variants and Renal Cell Cancer Risk

Slamova, Alena, Pfeiffer, Ruth M., Moore, Lee E., Mates, Dana, Zaridze, David, Szeszenia-Dabrowska, Neonila, Gibson, Todd M., Yeager, Meredith, Brennan, Paul, Bencko, Vladimir, Karami, Sara, Stolzenberg-Solomon, Rachael Z., Chow, Wong-Ho, Boffetta, Paolo, Janout, Vladimir, Rothman, Nat, Han, Summer, Mayne, Susan T., Chanock, Stephen, Kollarova, Helen, Navratilova, Marie, Rosenberg, Philip S.

2011

Overview

Folate and one-carbon metabolism are linked to cancer risk through their integral role in DNA synthesis and methylation. Variation in one-carbon metabolism genes, particularly MTHFR, has been associated with risk of a number of cancers in epidemiologic studies, but little is known regarding renal cancer. Tag single nucleotide polymorphisms (SNPs) selected to produce high genomic coverage of 13 gene regions of one-carbon metabolism (ALDH1L1, BHMT, CBS, FOLR1, MTHFR, MTR, MTRR, SHMT1, SLC19A1, TYMS) and the closely associated glutathione synthesis pathway (CTH, GGH, GSS) were genotyped for 777 renal cell carcinoma (RCC) cases and 1,035 controls in the Central and Eastern European Renal Cancer case-control study. Associations of individual SNPs (n = 163) with RCC risk were calculated using unconditional logistic regression adjusted for age, sex and study center. Minimum p-value permutation (Min-P) tests were used to identify gene regions associated with risk, and haplotypes were evaluated within these genes. The strongest associations with RCC risk were observed for SLC19A1 (P(min-P) = 0.03) and MTHFR (P(min-P) = 0.13). A haplotype consisting of four SNPs in SLC19A1 (rs12483553, rs2838950, rs2838951, and rs17004785) was associated with a 37% increased risk (p = 0.02), and exploratory stratified analysis suggested the association was only significant among those in the lowest tertile of vegetable intake. To our knowledge, this is the first study to comprehensively examine variation in one-carbon metabolism genes in relation to RCC risk. We identified a novel association with SLC19A1, which is important for transport of folate into cells. Replication in other populations is required to confirm these findings.

• Publisher: Public Library of Science,Public Library of Science (PLoS)
• Subject: Betaine-homocysteine S-methyltransferase / Cancer / Cancer genetics / Cancer research / Carbon / Carbon - metabolism / Deoxyribonucleic acid / DNA / DNA biosynthesis / DNA methylation / DNA synthesis / Epidemiology / Folic acid / Food intake / Genes / Genetic aspects / Glutathione / Haplotypes / Health aspects / Health risk assessment / Health risks / Kidney cancer / Medicine / Metabolism / Methylation / Methylenetetrahydrofolate reductase / Nucleotides / Oligonucleotide Array Sequence Analysis / Oryza - genetics / Oryza - metabolism / Permutations / Physiological aspects / Preventive medicine / Regression analysis / Renal cell carcinoma / Risk / Risk factors / Single nucleotide polymorphisms / Single-nucleotide polymorphism / Studies / Synthesis / Transcriptome