ABSTRACT
Objective To investigate the association SLC25A12 and SCN2A2 gene single nucleotide polymorphisms(SNPs) and susceptibility to autism among 105 Japanese family trios consisting of fathers,mothers,and affected offsprings with autism.Methods Genomic DNA was isolated from the whole blood samples.The PCR-single stranded conformational polymorphism(SSCP) technique was used to test genotype of SNPs(rs3770448,rs3769955) at SLC25A12 and SCN2A2 genes.Results The distributions of genotypic and allelic frequencies of rs3770448 and rs3769955 were not deviated from the Hardy-Weinberg equilibrium.The results of transmission disequilibrium test(TDT) indicated that the allelic frequency transmitted from the heterozygote parents didn′t deviate 50%.Conclusion The polymorphism of rs3770448 in the SLC25A12 and rs3769955 in the SCN2A2 locus may not be associated with autism.But the association of the other SNPs at the SLC25A12 and SCN2A2 locus with the illness can not be ruled out.