Haplotype associations of 894 DNA samples of elderly people from the Russian population of Tomsk were analyzed using 49 SNPs (single nucleotide polymorphisms). As the analyzed markers, SNPs were selected that showed an association with Alzheimer's disease or variability of cognitive abilities in genome-wide association studies. As a result of the analysis, blocks on chromosomes 1, 2, 6, 8, 11, 19, and 20 were identified. Significant associations were shown, taking into account 50 000 permutations, for haplotypes localized on chromosomes 1 and 19 in the genesCR1andAPOE,APOC1, respectively. Our results confirm the role of theAPOEandCR1genes in the pathogenesis of Alzheimer's disease in the Russian population.

A developed method of multiplex genotyping of polymorphic markers of genes associated with cognitive abilities and neuropsychiatric diseases is based on multilocus PCR and MALDI-TOF mass spectrometry of DNA molecules. The frequencies of 32 single-nucleotide markers localized in 24 genes are analyzed in a sample of elderly people from the Russian population of Tomsk. The data obtained are compared with data for populations from the 1000 Genomes Project.