Alfa-Synuclein polymorphism and Parkinson’s disease in a tau homogeneous population

ABSTRACT

Background & Objective: The MAPT H1 haplotype and SNCA single nucleotide polymorphism (SNP) rs356219 have been reported to have a synergistic effect on the risk of Parkinson’s disease (PD). Because the H1/H1 genotype has been reported to predominate in Korean population, we investigated the polymorphism of rs356219 in 878 PD patients and 559 controls. Methods: The SNCA SNP rs356219 was analyzed in 878 PD patients and in 559 healthy Korean subjects. Results: The G allele of SNCA SNP rs356219 was found to contribute to PD susceptibility with odds ratios (ORs) similar to those reported previously. However, the ORs were not as large as that of the SNCA rs356219 plus MAPT H1/H1 combination reported in the literature, which cast doubt on the existence of a synergistic effect between the two genotypes in our population. Conclusions: This study supports that the G allele of the SNCA SNP rs356219 contributes to PD susceptibility as reported previously, but it does not support the presence of a synergistic interaction between SNCA and MAPT.