The Interaction of the 5, 10-methylenetetrahydrofolate Reductase (MTHFR) Polymorphism with Folate and Vitamin $B_12$ and Serum Homocysteine Concentrations in Pregnant Women

임신부의 5, 10-methylenetetrahydrofolate Reductase (MTHFR) 유전자형과 엽산 및 비타민 $B_12$ 섭취량이 혈중 호모시스테인 수준에 미치는 영향

  • 김기남 (이화여자대학교 생활환경대학 식품영양학과) ;
  • 김영주 (이화여자대학교 의과대학 산부인과학교실) ;
  • 장남수 (이화여자대학교 생활환경대학 식품영양학과)
  • Published : 2002.12.01

Abstract

Hyperhomocysteinemia, resulted from an interaction between the mutation of MTHFR gene and B vitamin deficiency, is suggested as a possible cause for complications and adverse outcomes of pregnancy. The purpose of the present study was to investigate the relationship between the intakes of B vitamins and serum homocysteine concentrations with the C677T mutation in the MTHFR genotypes in 135 normal pregnant women of 24-28 weeks of gestation. Dietary intake of B vitamins did not differ among the three genotypes, but the negative correlation between dietary folate intake and the serum homocysteine level was the strongest in the T/T type (r = -0.249) than in other genotypes (C/T: r= -0.040, C/C:r= 0.126, p<0.05). Among the subject with the T/T type, the pregnant women who consumed folate less than 50% of the RDA had higher serum homocysteine levels than those who consumed folate greater than 125% of the RDA (10.4$\pm$5.9 vs 7.0$\pm$1.5 $\mu$mol/L, p<0.05). Serum homocysteine levels were higher in the women with micronutrient supplements than those with no supplements in the T/T type, but such relation was not present in the C/C or the C/T type. In conclusion, serum homocysteine concentrations were influenced by the interrelationship between the MTHFR polymorphisms and dietary folate intake or micronutrient supplementation.

Keywords

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