Frigerio, CS;
Fiers, M;
Voet, T;
De Strooper, B;
(2017)
Identification of Low Allele Frequency Mosaic Mutations in Alzheimer Disease.
In: Frade, JM and Gage, FH, (eds.)
Genomic Mosaicism in Neurons and Other Cell Types.
(pp. 361-378).
Humana Press: New York, NY, USA.
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Abstract
Germline mutations ofAPP,PSEN1, andPSEN2 genes cause autosomal dominant Alzheimer disease (AD). Somatic variants of the same genes may underlie pathogenesis in sporadic AD, which is the most prevalent form of the disease. Importantly, such somatic variants may be present at very low allelic frequency, confined to the brain, and are thus very difficult or impossible to detect in blood-derived DNA. Ever-refined methodologies to identify mutations present in a fraction of the DNA of the original tissue are rapidly transforming our understanding of DNA mutation and their role in complex pathologies such as tumors. These methods stand poised to test to what extend somatic variants may play a role in AD and other neurodegenerative diseases.
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