Relationship of MTHFD1 G1958A and CBS 844ins68 polymorphism with congenital heart defects in North Indian population (Jammu and Kashmir): A case-control study

Abstract

Objectives: There are many multifactorial causes for Congenital Heart Defects (CHDs) in which both genetic and non-genetic factors play role. MTHFD1 and CBS are two of the key enzymes that plays pivotal role in the metabolic pathway of homocysteine. Most of the studies revealed that genes involved in folate/homocysteine pathways are involved in the occurrence of CHDs. The present study was planned to investigate the role of common polymorphisms in MTHFD1 and CBS gene in children with CHD in Jammu region of Jammu and Kashmir UT. Material and Methods: A total of 160 (80 CHD patients and 80 controls) children were enrolled for the present case-control study. After extraction of genomic DNA genotyping of SNP MTHFD1 G1958A(rs2236225) was done by PCR-RFLP and CBS 844ins68 polymorphism was done by PCR technique. Results: Our results show that there is no significant association between MTHFD1G1958A and CBS 844ins68 polymorphism with CHD. In case of SNP MTHFD1 G1958A allele A found to be higher in both patient and control group and inCBS 844ins68 polymorphism frequency of risk allele ‘I’ found higher in cases (0.06) as compared to controls (0.04). The homozygous genotype for 844ins68 (II) was found absent in both the patients and control group. Conclusion: We conclude that both MTHFD1 G1958A and CBS 844ins68 polymorphism were not found to be genetic risk factor in the development of CHD in population of Jammu region of Jammu and Kashmir UT.