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Obstructive heart defects (OHDs) are a major health concern worldwide. The platelet-derived growth factor ( PDGF ) genes are known to have regulatory functions that are essential for proper heart development. In a zebrafish model,  Pdgfra  was further demonstrated to interact with ethanol during craniofacial development. In this article, we investigated interactions between variants in  PDGF  genes and periconceptional alcohol exposure on the risk of OHDs by applying log-linear models to 806 OHD case and 995 control families enrolled in the National Birth Defects Prevention Study. The interactions between four variants in  PDGFA  and maternal binge drinking reached a nominal significance level. The maternal  T  allele of rs869978 was estimated to increase OHD risk among women who binge drink, while infant genotypes of rs2291591, rs2228230, rs1547904, and rs869978 may reduce the risk. Although none of these associations remain statistically significant after multiple testing adjustment and the estimated maternal effect may be influenced by unknown confounding factors, such as maternal smoking, these findings are consistent with previous animal studies supporting potential interactions between the  PDGFRA  gene and maternal alcohol exposure. Replication studies with larger sample sizes are needed to further elucidate this potential interplay and its influence on OHD risks.

PDGFRA gene, maternal binge drinking and obstructive heart defects