title: Genome-wide scan for copy number variation association with age at onset of Alzheimer's disease.
abstract: Alzheimer's disease (AD) is a progressive neurodegenerative disease with high prevalence, which imposes a substantial public health problem. The heritability of AD is estimated at 60-80% forecasting the potential use of genetic biomarkers for risk stratification in the future. Several large scale genome-wide association studies using high frequency variants identified 10 loci accountable for only a fraction of the estimated heritability. To find the missing heritability, systematic assessment of various mutational mechanisms needs to be performed. This copy number variation (CNV) genome-wide association study with age at onset (AAO) of AD identified 5 CNV regions that may contribute to the heritability of AAO of AD. Two CNV events are intragenic causing a deletion in CPNE4. In addition, to further study the mutational load at the 10 known susceptibility loci, CNVs overlapping with these loci were also catalogued. We identified rare small events overlapping CR1 and BIN1 in AD and normal controls with opposite CNV dosage. The CR1 events are consistent with previous reports. Larger scale studies with deeper genotyping specifically addressing CNV are needed to evaluate the significance of these findings.
authors.affiliation: Department of Neurology, University at Buffalo SUNY, Buffalo, NY 14203, USA. szigeti@buffalo.edu
authors.forename: Kinga
authors.initials: K
authors.lastname: Szigeti
authors.forename: Deepika
authors.initials: D
authors.lastname: Lal
authors.forename: Yanchun
authors.initials: Y
authors.lastname: Li
authors.forename: Rachelle S
authors.initials: RS
authors.lastname: Doody
authors.forename: Kirk
authors.initials: K
authors.lastname: Wilhelmsen
authors.forename: Li
authors.initials: L
authors.lastname: Yan
authors.forename: Song
authors.initials: S
authors.lastname: Liu
authors.forename: Changxing
authors.initials: C
authors.lastname: Ma
mesh_terms: D048868:Adaptor Proteins, Signal Transducing / Q000235:genetics*; D017668:Age of Onset; D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000235:genetics*; D001057:Apolipoproteins E / Q000235:genetics; D003598:Cytoskeletal Proteins / Q000235:genetics; D005260:Female; D017353:Gene Deletion; D018628:Gene Dosage / Q000235:genetics*; D020022:Genetic Predisposition to Disease / Q000235:genetics; D055106:Genome-Wide Association Study; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D009687:Nuclear Proteins / Q000235:genetics*; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D016016:Proportional Hazards Models; D017463:Receptors, Complement 3b / Q000235:genetics*; D025521:Tumor Suppressor Proteins / Q000235:genetics*
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D001057:Apolipoproteins E; C101410:BIN1 protein, human; C114545:CD2-associated protein; C509991:CR1 protein, human; D003598:Cytoskeletal Proteins; D009687:Nuclear Proteins; D017463:Receptors, Complement 3b; D025521:Tumor Suppressor Proteins