MTR Polymorphic Variant A2756G and Retinoblastoma Risk in Brazilian Children

作者：Santos de Lima Elker Lene; da Silva Vanessa Cavalcante; Angelo da Silva Hildson Dornelas; Bezerra Alexandre Medeiros; Lins de Morais Vera Lucia; de Morais Adriana Lins; Cruz Raquel Vera; Magalhaes Barros Mario Henrique; Hassan Rocio; de Freitas Antonio Carlos; Cartaxo Muniz Maria Tereza

来源：Pediatric Blood and Cancer, 2010, 54(7): 904-908.

DOI：10.1002/pbc.22472

• Brazilian population
• MTHFR C677T and A1298C
• MTR A2756G
• retinoblastoma
• RFC A80G
• TYMS

Background. Polymorphisms in the genes of folate and methionine metabolism enzymes have been associated with some forms of cancer by affecting DNA synthesis, repair, and methylation. Procedure. A case control study of 72 retinoblastoma cases and 98 cancer-free children controls was performed to investigate whether the polymorphisms of the methylenetetrahydrofolate reductase (MTHFR C677T and A1298C), methionine synthase (MTR A2756G), carrier of reduced folate 1 (RFC-1 A80G) and thymidylate synthase (TYMS 2R > 3R) altered the risk for retinoblastoma. Results. MTR A2756G AG plus GG genotype frequencies were higher in patients than in controls (45% vs. 26%, P = 0.03). Individual carriers of the variant allele G had a 2.02 (95% CI: 1.05-3.92)-fold increased risk for retinoblastoma. In contrast, no association was observed with respect to MTHFR C677T and A1298C, RFC A80G, and TYMS polymorphisms. Conclusions. This study presents evidence for an association between the MTR A2756G polymorphism and retinoblastoma susceptibility in a Northeast population from Brazil. Pediatr Blood Cancer 2010;54:904-908.

• 出版日期2010-7-1