Polymorphisms of 5,10-Methylenetetrahydrofolate Reductase (MTHFR C677T and A1298C) Gene in Recurrent Spontaneous Abortion

5,10-Methylenetetrahydrofolate Reductase (MTHFR C677T와 A1298C) 유전자 돌연변이의 반복자연유산 관련성 연구

  • Kim, Nam-Keun (Institute for Clinical Research, College of Medicine, Pochon CHA University) ;
  • Nam, Yoon-Sung (Infertility Medical Center, CHA General Hospital) ;
  • Lee, Su-Man (Infertility Medical Center, CHA General Hospital) ;
  • Kim, Sun-Hee (Institute for Clinical Research, College of Medicine, Pochon CHA University) ;
  • Shin, Seung-Joo (Department of Obstetrics and Gynecology, College of Medicine, Pochon CHA University) ;
  • Chang, Sung-Woon (Department of Obstetrics and Gynecology, College of Medicine, Pochon CHA University) ;
  • Kim, Se-Hyun (Department of Preventive, College of Medicine, Pochon CHA University) ;
  • Cha, Kwang-Yul (Infertility Medical Center, CHA General Hospital) ;
  • Oh, Do-Yeun (Institute for Clinical Research, College of Medicine, Pochon CHA University)
  • 김남근 (포천중문 의과대학교 임상의학연구소) ;
  • 남윤성 (차병원 여성의학연구소) ;
  • 이수만 (차병원 여성의학연구소) ;
  • 김선희 (포천중문 의과대학교 임상의학연구소) ;
  • 신승주 (포천중문 의과대학교 분당 차병원 산부인과) ;
  • 장성운 (포천중문 의과대학교 분당 차병원 산부인과) ;
  • 김세현 (포천중문 의과대학교 예방의학교실) ;
  • 차광렬 (차병원 여성의학연구소) ;
  • 오도연 (포천중문 의과대학교 임상의학연구소)
  • Published : 2002.09.30

Abstract

Objective : Previous studies have suggested that hyperhomocysteinemia and methylenetetrahydrofolate reductase (MTHFR C677T) mutations are associated with increased risk of recurrent spontaneous abortion (RSA). Recently, a second site polymorphism in MTHFR, 1298A-->C, which changes a glutamic acid into an alanine residue, was shown to be associated with a decreased enzyme activity. We tested whether the variant alleles of MTHFR C677T and A1298C are risk factor (biomarker) for RSA. Materials and Methods: We analyzed DNA from a case-control study in the Korean DNA was extracted from blood samples of 118 patients with RSA and 123 healthy fertile patients as the controls. MTHFR variant alleles were determined by a PCR-restriction fragment length polymorphism assay. Results: We found no evidence for an association between 677TT genotype and risk of RSA (OR=1.95, 95% CI=$0.84{\sim}4.50$, p=0.12). However, the MTHFR 1298AC (OR=0.36, 95% CI=$0.20{\sim}0.63$, p=0.0004) and 1298AC+CC (OR=0.35, 95% CI=$0.20{\sim}0.61$, p=0.0002) genotypes were lower among 118 RSA cases compared with 123 controls, conferring a 2.8-fold decrease in risk of RSA, respectively. Moreover, the combined genotypes of MTHFR 677CC/1298AC (OR=0.30, 95% CI=$0.10{\sim}0.88$, p=0.029) and 677CT/1298AC (OR=0.77, 95% CI=$0.60{\sim}0.99$, p=0.043) also showed significantly lower risk than those with MTHFR 677CC/1298AA type. Conclusion: MTHFR 1298AC, MTHFR 677CC/1298AC and 677CT/1298AC genotypes may represent genetic markers for the protection of RSA at least in Korean women.

Keywords

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