Thymidylate synthase gene variation is associated with the risk for conotruncal heart defects in Chinese population.

Abstract:

:Conotruncal heart defects are considered to be one of the most common types of birth defect worldwide. Genetic disturbances in folate metabolism such as Thymidylate synthase may increase risk for conotruncal heart defects. We evaluated two common Thymidylate synthase polymorphisms, including the 28 bp tandem repeat in the promoter enhancer region of the 5'-untranslated region and the 6 bp deletion in the 3'-untranslated region, as risk factors of conotruncal heart defects including various subtypes of malformations, in a total of 193 mothers with conotruncal heart defect in offspring and 234 healthy controls in the Chinese population. Logistic regression analyses revealed that mothers who were homozygotes with deletion (-/-) had a 1.8-fold (odds ratio: 1.8; 95% confidence interval: 1.0-3.0, p = 0.040) increased risk for conotruncal heart defect in offspring, respectively, when compared with mothers carrying the wild type (+/+) genotype. Consistently, individuals carrying the genotype -/- of the Thymidylate synthase 6 bp deletion also had higher plasma homocysteine levels compared to the mothers carrying the genotype +/+ in the control and conotruncal heart defect groups (p = 0.006 and p = 0.004, respectively). However, our results showed that Thymidylate synthase 28 bp tandem repeat polymorphism was not associated with risk for conotruncal heart defect and plasma homocysteine level. In conclusion, our data suggest that the maternal Thymidylate synthase 6 bp deletion polymorphism might be associated with plasma homocysteine level and risk for conotruncal heart defect in offspring.

journal_name

Cardiol Young

journal_title

Cardiology in the young

authors

Wang X,Wei H,Wu Y,Tian Y,Luo L

doi

10.1017/S1047951118002184

subject

Has Abstract

pub_date

2018-12-21 00:00:00

pages

1-6

eissn

1047-9511

issn

1467-1107

pii

S1047951118002184

pub_type

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