Identifying genes associated with obstructive congenital heart defects using a family-based genetic random field...

Area of Science:

• Genetics
• Developmental Biology
• Pediatrics

Background:

• Congenital heart defects (CHDs) are the most common birth defects and a leading cause of infant mortality.
• While common genetic variants have been studied, the genetic basis of CHDs, especially rare variants, remains largely unknown.

Purpose of the Study:

• To identify rare genetic variants associated with congenital heart defects (CHDs) using a family-based approach.
• To investigate the genetic etiology of CHDs by analyzing rare variants with heterogeneous effects.

Main Methods:

• Applied a family-based genetic random field (FGRF) method to DNA from 1,123 case families and 1,481 control families in the National Birth Defects Prevention Study (NBDPS).
• Conducted gene-based association tests for 24,270 genes and performed gene set enrichment analyses.

Main Results:

• Identified a significant association between the SLC44A2 gene and obstructive CHD risk after Bonferroni correction.
• Gene set enrichment analyses supported SLC44A2's role in biological pathways relevant to CHD development.

Conclusions:

• The study highlights SLC44A2 as a key gene associated with obstructive CHDs, providing a robust genetic signal.
• These findings complement existing research and offer new insights into the genetic underpinnings of CHDs.