ABSTRACT: Mutations in three genes PSEN1, PSEN2, and APP are known to be a cause of familial forms of Alzheimer’s disease (AD). APOE gene polymorphism is a strong risk genetic factor for AD. We have evaluated allele and genotype frequency distribution of rs11136000 polymorphism in the clusterin (CLU) gene (or apolipoprotein J, APOJ) in the samples from three Russian populations and in AD patients. Genome-wide association studies in samples from several European populations have recently revealed the highly
significant association of CLU gene with AD (p = 8.5 × 10−10). We found no differences in allele and genotype frequencies of rs11136000 between the populations from the Moscow, Ural, and Siberia regions. The allele frequencies are close to those in European
populations. The genetic association analysis in cohort of AD patients and normal individuals (>500 individuals in each group) revealed no significant association of the rs11136000 polymorphism in CLU gene with Alzheimer’s disease in Russian populations. Although our results showed that the CLU gene polymorphism rs11136000 is likely not a major genetic factor for the common form of Alzheimer’s disease, the data do not rule out the possibility
of a modest effect of CLU and interaction between CLU and APOE genotypes in etiology of Alzheimer’s disease.
Key wordsAlzheimer’s disease-association analysis-polymorphism-apolipoprotein J (APOJ)-clusterin (CLU)
Molecular Biology 04/2012; 44(4):546-551. · 0.66 Impact Factor
ABSTRACT: Small RNA is a variable and abundant type of non-coding RNAs in brain. The function of these RNAs is mainly unknown. A specific class of small RNA, microRNA, is dynamically regulated in neurogenesis and in embryo brain development. The genes for synaptic formation and some mental retardation disorders are putative targets for microRNA predicted by computational algorithms. The molecular pathways for mental development, common forms of autisms, schizophrenia, and affective disorders have yet to be elucidated. The hypothesis proposed here is that small regulatory RNAs, specifically microRNAs, play a role in human brain development and pathogenesis of brain disorders, especially of neurodevelopmental conditions. Pilot tests using comprehensive arrays of microRNAs demonstrate that microRNAs derived from postmortem human brains are applicable for microRNA expression profiling. The abundant expression of many regulatory small RNAs in human brain implies their biological role that must be tested by functional assays in neurons and by genetic and comparative expression profiling.
Biochemistry (Moscow) 01/2006; 70(12):1404-7. · 1.06 Impact Factor
Forensic Science International Genetics Supplement Series