Targeted copy number variant identification across the neurodegenerative disease spectrum.
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Dilliott Allison A, Zhang Kristina K, Wang Jian, Abrahao Agessandro, Binns Malcolm A, Black Sandra E, Borrie Michael, Dowlatshahi Dar, Finger Elizabeth, Fischer Corinne E, Frank Andrew, Freedman Morris, Grimes David, Hassan Ayman, Jog Mandar, Kumar Sanjeev, Lang Anthony E, Mandzia Jennifer, Masellis Mario, Pasternak Stephen H, Pollock Bruce G, Rajji Tarek K, Rogaeva Ekaterina, Sahlas Demetrios J, Saposnik Gustavo, Sato Christine, Seitz Dallas, Shoesmith Christen, Steeves Thomas D L, Swartz Richard H, Tan Brian, Tang-Wai David F, Tartaglia Maria C, Turnbull John, Zinman Lorne, ONDRI Investigators, Hegele Robert A
Аннотация
METHODS: Here, we applied a depth of coverage approach to detect CNVs in 80 genes previously associated with neurodegenerative disease within participants of the Ontario Neurodegenerative Disease Research Initiative (n = 519).
RESULTS: In total, we identified and validated four CNVs in the cohort, including: (1) a heterozygous deletion of exon 5 in OPTN in an Alzheimer's disease participant; (2) a duplication of exons 1-5 in PARK7 in an amyotrophic lateral sclerosis participant; (3) a duplication of >3 Mb, which encompassed ABCC6, in a cerebrovascular disease (CVD) participant; and (4) a duplication of exons 7-11 in SAMHD1 in a mild cognitive impairment participant. We also identified 43 additional CNVs that may be candidates for future replication studies.
CONCLUSION: The identification of the CNVs suggests a portion of the apparent missing heritability of the phenotypes may be due to these structural variants, and their assessment is imperative for a thorough understanding of the genetic spectrum of neurodegeneration.