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Dietary and genetic determinants of homocysteine levels among Mexican women of reproductive age.
Eur J Clin Nutr. 2006 Jun; 60(6):691-7.EJ

Abstract

OBJECTIVE

To evaluate the independent and joint effects of dietary folate, vitamin B(12) consumption and methylenetetrahydrofolate reductase (MTHFR) polymorphisms (677C>T and 1298A>C) on the circulating folate and homocysteine (Hcy) levels among Mexican women of reproductive age.

DESIGN

A cross-sectional, population-based study.

SUBJECTS

The first 130 healthy non-pregnant women (aged 16-34 years) who agreed to participate in a reproductive cohort in Morelos, Mexico.

MAIN OUTCOME MEASUREMENTS

Dietary intakes of vitamin B(12) and folate were estimated using a semiquantitative food frequency questionnaire. MTHFR 677C>T and 1298A>C polymorphisms were ascertained using the PCR-based method. Serum levels of Hcy and folate were determined using high-performance liquid chromatography and radioimmunoassay, respectively.

RESULTS

Genotype frequencies for the MTHFR 677C>T polymorphism were 21.5% (CC), 52.3% (CT) and 26.2% (TT) among Mexican women. Of the population, 22% had the MTHFR 1298AC genotype, while no individual carried the 1298CC genotype. We observed an increased level of Hcy among carriers of the 677TT genotype, compared to carriers of the 677CC genotype. The highest level of Hcy was observed among MTHFR 677TT carriers with low B(12) intake (<2.0 microg/day), which resulted with a significant interaction (P=0.01).

CONCLUSION

Vitamin B(12) is an important determinant of Hcy levels in Mexico. Supplementation of folic acid with vitamin B(12) may be preferable when the MTHFR 677T variant allele is prevalent.

Authors+Show Affiliations

Department of Reproductive Health, National Institute of Public Health, Morelos, Mexico.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16418743

Citation

Torres-Sánchez, L, et al. "Dietary and Genetic Determinants of Homocysteine Levels Among Mexican Women of Reproductive Age." European Journal of Clinical Nutrition, vol. 60, no. 6, 2006, pp. 691-7.
Torres-Sánchez L, Chen J, Díaz-Sánchez Y, et al. Dietary and genetic determinants of homocysteine levels among Mexican women of reproductive age. Eur J Clin Nutr. 2006;60(6):691-7.
Torres-Sánchez, L., Chen, J., Díaz-Sánchez, Y., Palomeque, C., Bottiglieri, T., López-Cervantes, M., & López-Carrillo, L. (2006). Dietary and genetic determinants of homocysteine levels among Mexican women of reproductive age. European Journal of Clinical Nutrition, 60(6), 691-7.
Torres-Sánchez L, et al. Dietary and Genetic Determinants of Homocysteine Levels Among Mexican Women of Reproductive Age. Eur J Clin Nutr. 2006;60(6):691-7. PubMed PMID: 16418743.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dietary and genetic determinants of homocysteine levels among Mexican women of reproductive age. AU - Torres-Sánchez,L, AU - Chen,J, AU - Díaz-Sánchez,Y, AU - Palomeque,C, AU - Bottiglieri,T, AU - López-Cervantes,M, AU - López-Carrillo,L, Y1 - 2006/01/18/ PY - 2006/1/19/pubmed PY - 2006/10/25/medline PY - 2006/1/19/entrez SP - 691 EP - 7 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 60 IS - 6 N2 - OBJECTIVE: To evaluate the independent and joint effects of dietary folate, vitamin B(12) consumption and methylenetetrahydrofolate reductase (MTHFR) polymorphisms (677C>T and 1298A>C) on the circulating folate and homocysteine (Hcy) levels among Mexican women of reproductive age. DESIGN: A cross-sectional, population-based study. SUBJECTS: The first 130 healthy non-pregnant women (aged 16-34 years) who agreed to participate in a reproductive cohort in Morelos, Mexico. MAIN OUTCOME MEASUREMENTS: Dietary intakes of vitamin B(12) and folate were estimated using a semiquantitative food frequency questionnaire. MTHFR 677C>T and 1298A>C polymorphisms were ascertained using the PCR-based method. Serum levels of Hcy and folate were determined using high-performance liquid chromatography and radioimmunoassay, respectively. RESULTS: Genotype frequencies for the MTHFR 677C>T polymorphism were 21.5% (CC), 52.3% (CT) and 26.2% (TT) among Mexican women. Of the population, 22% had the MTHFR 1298AC genotype, while no individual carried the 1298CC genotype. We observed an increased level of Hcy among carriers of the 677TT genotype, compared to carriers of the 677CC genotype. The highest level of Hcy was observed among MTHFR 677TT carriers with low B(12) intake (<2.0 microg/day), which resulted with a significant interaction (P=0.01). CONCLUSION: Vitamin B(12) is an important determinant of Hcy levels in Mexico. Supplementation of folic acid with vitamin B(12) may be preferable when the MTHFR 677T variant allele is prevalent. SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/16418743/Dietary_and_genetic_determinants_of_homocysteine_levels_among_Mexican_women_of_reproductive_age_ L2 - http://dx.doi.org/10.1038/sj.ejcn.1602370 DB - PRIME DP - Unbound Medicine ER -