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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
New Genome-Wide Methods for Elucidation of Candidate Copy Number Variations (CNVs) Contributing to Alzheimer's Disease Heritability.
The complexity of human genetic variation has been extended by the observation of abundant and widespread variation in the copy number of submicroscopic DNA segments. The discovery of this novel level of genome organization opened new possibilities concerning the genetic variation that may confer susceptibility to or cause disease. Copy number variants (CNVs) influence gene expression, phenotypic variation and adaptation by altering gene dosage and genome organization. Concordant with the common disease common variant hypothesis these structural variants are now subject to interrogation for disease association. Alzheimer's disease (AD) is a progressive neurodegenerative disease with an estimated heritability of 60-80 %. Large scale genome-wide association studies (GWAS) using high frequency single nucleotide polymorphism (SNP) variants identified ten loci which do not account for the measured heritability. To find the missing heritability systematic assessment of all mutational mechanisms needs to be performed. Between the powerful SNP-GWAS studies and the planned Whole Genome Sequencing projects the contribution of copy number variation (CNV) to the genetic architecture of AD needs to be studied fully.
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