Resumen

GARCIA-ROBLES, Reggie et al. The association between homocysteine-methionine and folate metabolism and pregnancy complicated by idiopathic intrauterine growth restriction: Preliminary data. Rev Colomb Obstet Ginecol [online]. 2012, vol.63, n.4, pp.334-345. ISSN 0034-7434.

Objective: This work was aimed at evaluating the association between homocysteine-metionine and folate metabolism alteration and pregnancies complicated by idiopathic intrauterine growth restriction (IUGR). This was done by studying pre- and post-partum homocysteine, vitamin B12 and folate levels, as well as allele and genotype frequency for genetic polymorphisms from enzymes participating in the homocysteine-methionine and folate metabolic route in pregnant women having pregnancies complicated by idiopathic IUGR and physiological conditions during normal pregnancy. Materials and methods: This was an analytical observational (cases and controls) pilot study. Eight pregnant women suffering IUGR were studied, as well as 21 pregnant women as control whose pregnancy had no complications and healthy newborn. Folate, vitamin and B12 homocysteine concentrations as well as postpartum homocysteine levels were analyzed during the third trimester of pregnancy. The pregnant women’s genotypes were determined formethylenetetrahydrofolate reductase (MTHFR) C677T, MTHFR A1298C, methionine synthase reductase (MTRR) A66G, cystathionine betasynthase (CBS) 844ins68, CBS 31pb VNTR, CBS C699T and CBS C1080T polymorphisms by polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP). Results: MTHFR C677T polymorphisms and the CBS 31bp VNTR 18/18 genotype (independently and in coexistence) were associated with low folate levels. The CBS 31bp VNTR 18/18 genotype alone and when coexisting with MTHFR C677T was associated with idiopathic IUGR. Conclusions: Homocysteine-methionine and folate metabolism is important for embryo-fetus growth and development. Compromise of these metabolic routes is associated with pregnancy complications such as idiopathic IUGR. This study's preliminary results should encourage studying homocysteine-methionine and folate metabolism in complications regarding pregnancy such as IUGR and in physiological conditions during normal pregnancy in our population.

Palabras clave : Homocysteine; methionine; folate; intrauterine growth restriction.

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