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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Prevalence of methylenetetrahydrofolate reductase 677T and 1298C alleles and folate status: A comparative study in Mexican, West African, and European populations
American Journal of Clinical Nutrition, Volume 83, No. 3, Year 2006
Notification
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Description
Background: Methylenetetrahydrofolate reductase (MTHFR) 677C→T polymorphism is heterogeneously distributed worldwide, with the highest and lowest frequencies of the T allele in Mexico and Africa, respectively, and a south-to-north gradient in Europe. Distribution of MTHFR 1298A→C is less well known. It has been hypothesized that 677T frequency could result in part from gene-nutrient interactions. Objective: The objective was to compare the association of 677T and 1298C alleles with plasma concentrations of homocysteine, folate, and vitamin B-12 in geographical areas with contrasting 677T allele frequencies. Design: Healthy young adults (n = 1277) were recruited in Mexico City, the West African countries of Bénin and Togo, France, and Sicily (Italy). Homocysteine, folate, and vitamin B-12 were measured in plasma, and MTHFR polymorphisms were measured in genomic DNA. Results: Mexico City and Sicily reported the highest and Bénin and Togo reported the lowest plasma concentrations of folate. Mexico City had the highest 677T allele prevalence and the lowest influence of 677TT genotype on homocysteine, whereas the opposite was observed in Africa. The prevalence of the 1298C allele was lowest in the Mexicans and Africans and highest in the French. The percentage of the 677T genotype was significantly associated with the folate concentrations in 677CC carriers in a univariate analysis (R = 0.976; 95% CI: 0.797, 0.996; P < 0.0002) and in a multiple regression model that included homocysteine, vitamin B-12, and age (P = 0.0002). Conclusion: Our data agree with the hypothesis of a gene-nutrient interaction between MTHFR 677C→T polymorphism and folate status that may confer a selective advantage of TT-homozygous genotype when dietary intake of folate is adequate, at least in the areas studied. © 2006 American Society for Nutrition.
Authors & Co-Authors
Guéant-Rodríguez, Rosa María
France, Paris
Inserm
Gueánt, Jean Louis
France, Paris
Inserm
Debard, Renée
France, Paris
Inserm
Thirion, Sylvie
France, Paris
Inserm
Lu, Xiaohong
France, Paris
Inserm
Bronowicki, Jean Pierre
France, Paris
Inserm
Namour, Fares
France, Paris
Inserm
Chabi, Nicodème W.
Togo, Lome
Laboratory of Biochemistry and Nutrition
Sanni, Ambaliou
Togo, Lome
Laboratory of Biochemistry and Nutrition
Anello, Guido
Italy, Troina
Oasi Research Institute-irccs
Bosco, Paolo
Italy, Troina
Oasi Research Institute-irccs
Romano, Corrado
Italy, Troina
Oasi Research Institute-irccs
Amouzou, Emile Kou Santa Sabiba
Benin, Cotonou
National University Hospital of Cotonou
Arrieta, Heidy R.
Mexico, Tlalpan
Instituto Nacional de la Nutrición Salvador Zubiran
Sánchez, Beatríz E.
Mexico, Tlalpan
Instituto Nacional de la Nutrición Salvador Zubiran
Romano, Antonino G.
Italy, Rome
Università Cattolica Del Sacro Cuore, Campus Di Roma
Herbeth, Bernard
France, Paris
Inserm
Guilland, Jean Claude
France, Dijon
Université de Bourgogne
Mutchinick, Osvaldo M.
Mexico, Tlalpan
Instituto Nacional de la Nutrición Salvador Zubiran
Statistics
Citations: 19
Authors: 19
Affiliations: 7
Identifiers
Doi:
10.1093/ajcn.83.3.701
ISSN:
00029165
Research Areas
Food Security
Genetics And Genomics
Study Design
Cross Sectional Study
Study Locations
Togo