title: Maternal MTHFR 677C>T genotype and dietary intake of folate and vitamin B(12): their impact on child neurodevelopment.
abstract: Using the Bayley test, the mental and psychomotor development in a cohort of 253 children were evaluated. Maternal dietary intake of vitamin B(12) and folate was assessed from a semiquantitative questionnaire administered during the first trimester of pregnancy. Maternal genotypes of MTHFR (677C>T and 1298A>C), were ascertained by PCR-RFLP. The 677T and 1298C variant alleles were present in 59% and 10% of participants, respectively. A dietary deficiency of vitamin B(12) was negatively associated with mental development (beta = -1.6; 95% CI = -2.8 to -0.3). In contrast, dietary intake of folate (< 400 mg/day) reduced the mental development index only among children of mothers who were carriers of the TT genotype (beta = -1.8; 95% CI = -3.6 to -0.04; P for interaction = 0.07). Vitamin B(12) and folate supplementation during pregnancy could have a favorable impact on the mental development of children during their first year of life, mainly in populations that are genetically susceptible.
authors.affiliation: Instituto Nacional de Salud Pública, Morelos, Mexico.
authors.forename: Constanza
authors.initials: C
authors.lastname: del Río Garcia
authors.forename: Luisa
authors.initials: L
authors.lastname: Torres-Sánchez
authors.forename: Jia
authors.initials: J
authors.lastname: Chen
authors.forename: Lourdes
authors.initials: L
authors.lastname: Schnaas
authors.forename: Carmen
authors.initials: C
authors.lastname: Hernández
authors.forename: Erika
authors.initials: E
authors.lastname: Osorio
authors.forename: Marcia Galván
authors.initials: MG
authors.lastname: Portillo
authors.forename: Lizbeth
authors.initials: L
authors.lastname: López-Carrillo
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000254:growth & development*; D002657:Child Development / Q000502:physiology; D015331:Cohort Studies; D004032:Diet; D004777:Environment; D005260:Female; D005492:Folic Acid / Q000008:administration & dosage*; D005494:Folic Acid Deficiency / Q000150:complications; D005838:Genotype; D006801:Humans; D007223:Infant; D042965:Methylenetetrahydrofolate Reductase (NADPH2) / Q000235:genetics*; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D011247:Pregnancy; D011248:Pregnancy Complications; D011297:Prenatal Exposure Delayed Effects; D011596:Psychomotor Disorders / Q000453:epidemiology / Q000209:etiology; D014805:Vitamin B 12 / Q000008:administration & dosage*; D014806:Vitamin B 12 Deficiency / Q000150:complications
chemical_list: D005492:Folic Acid; D042965:Methylenetetrahydrofolate Reductase (NADPH2); D014805:Vitamin B 12