Association Between the 4p16 Susceptibility Locus and the Risk of Atrial Septal Defect in Population from Southeast China.

Three single nucleotide polymorphisms (SNPs), rs16835979, rs870142 and rs6824295, located in chromosome 4p16 were associated with the risk of ostium secundum atrial septal defect (ASD) in the European population. The 4p16 susceptibility locus in congenital heart disease was replicated in Chinese populations. Here, we analyzed the associations between these three SNPs and ASD in Chinese population from Fujian Province in southeast China. We conducted a case-control study by genotyping three SNPs in 354 non-syndromic ASD patients and 557 non-CHD control subjects. Logistic regression analyses showed that the genotype and allele frequencies of these three SNPs were significantly different between the cases and controls in Fujian Chinese population. The allele A of rs870142, the allele A of rs16835979 and the allele A of rs6824295 were significantly associated with an increased risk of ASD. According to the analysis of the three SNPs, the haplotype of AAA was associated with a significantly increased risk of ASD. Our study further supports that these three SNPs confer the predisposition to ASD phenotype in Chinese population.