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Power and Pitfalls of the Genome-Wide Association Study Approach to Identify Genes for Alzheimer’s Disease

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Abstract

Until recently, the search for genes contributing to Alzheimer’s disease (AD) had been slow and disappointing, with the notable exception of the APOE ε4 allele, which increases risk and reduces the age at onset of AD in a dose-dependent fashion. Findings from genome-wide association studies (GWAS) made up of fewer than several thousand cases and controls each have not been replicated. Efforts of several consortia—each assembling much larger datasets with sufficient power to detect loci conferring small changes in AD risk—have resulted in robust associations with many novel genes involved in multiple biological pathways. Complex data mining strategies are being used to identify additional members of these pathways and gene–gene interactions contributing to AD risk. Guided by GWAS results, next-generation sequencing and functional studies are under way with the hope of helping us better understand AD pathology and providing new drug targets.

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Acknowledgments

This work was supported by National Institutes of Health grants R01-AG025259, R01-AG17173, R01-AG33193, U01-AG032984, and P30-AG13846 and a grant from an anonymous private foundation.

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No potential conflicts of interest relevant to this article were reported.

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Authors and Affiliations

  1. Department of Medicine (Biomedical Genetics), Boston University School of Medicine, Boston, MA, 02118, USA

    Richard Sherva

  2. Departments of Medicine (Biomedical Genetics), Neurology, Ophthalmology, Genetics and Genomics, Biostatistics, and Epidemiology, Boston University Schools of Medicine and Public Health, Biomedical Genetics L-320, 72 East Concord Street, Boston, MA, 02118, USA

    Lindsay A. Farrer

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Correspondence to Lindsay A. Farrer.

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Sherva, R., Farrer, L.A. Power and Pitfalls of the Genome-Wide Association Study Approach to Identify Genes for Alzheimer’s Disease. Curr Psychiatry Rep 13, 138–146 (2011). https://doi.org/10.1007/s11920-011-0184-4

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