[Study of polymorphism G54D of MBL2 gene in gestational diabetes mellitus].

Objective: To assess the association of the G54D (rs1800450) polymorphism of the gene MBL2 in the gestational diabetes mellitus with the need for additional treatment and the occurrence of large newborns for the gestational age.

Subjects and methods: One hundred and five patients recruited in Joinville--Brazil were evaluated between November 2010 and October 2012. Pregnant women were divided in two groups correspondents to the presence (n = 37) or absence (n = 68) of the mutant allele. The variants of the polymorphism G54D were identified by restriction fragment lengths polymorphisms (RFLP). Anthropometric and biochemical parameters of the mother and the newborn, and the necessity of additional therapy associated with diet were assessed as the primary outcomes.

Results: Thirty-five point two percent of the evaluated patients carried at least one mutated allele of G54D polymorphism. There were no significant differences in weight gain, parity, age, body mass index and gestational age of arrival at maternity between the two groups. The groups of patients with or without the mutated allele did not differ in the need for additional treatment associated with diet (16.2% vs. 26.7%) respectively and with the occurrence of large newborns for gestational age (24.3% vs. 13.2%).

Conclusion: Our data showed that the polymorphism G54D of the gene MBL2 had no effect in the need for additional treatment associated with the diet-based therapy and in the occurrence of large newborns for gestational age in the studied population.