VEGF polymorphisms are associated with endocardial cushion defects: a family-based case-control study.

Area of Science:

• Cardiovascular Genetics
• Developmental Biology
• Molecular Medicine

Background:

• Endocardial cushion defects (ECDs) are prevalent congenital heart anomalies.
• Vascular Endothelial Growth Factor (VEGF) is crucial for heart development, specifically endocardial cushion formation.
• Genetic variations in the VEGF gene may influence susceptibility to ECDs.

Purpose of the Study:

• To investigate the association between functional single nucleotide polymorphisms (SNPs) in the VEGF gene and ECDs.
• To examine the transmission patterns of VEGF SNPs and haplotypes in families with ECDs.
• To explore potential gene-environment interactions related to VEGF and ECD development.

Main Methods:

• A case-control family study design was employed in a Dutch population.
• 190 children with ECDs and 317 control children, along with their parents, were analyzed.
• Linkage and association analyses were performed for three VEGF SNPs (-2578 C>A, -1154 G>A, -634 G>C) and their haplotypes.

Main Results:

• Allele frequencies for the studied VEGF SNPs did not differ significantly between cases and controls.
• VEGF alleles -2578 C and -1154 G showed increased transmission to children with ECDs (p = 0.003 and p = 0.002, respectively).
• The AAG haplotype (-2578A/-1154A/-634G) was associated with reduced ECD risk (OR 0.7) and was less transmitted to affected children (p = 0.002).

Conclusions:

• Specific VEGF gene variants, namely the -2578 C and -1154 G alleles, are associated with ECDs in the Dutch population.
• The AAG haplotype of VEGF SNPs demonstrates a protective effect against ECD development.
• Further research into VEGF gene-environment interactions is warranted to understand ECD pathogenesis.