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Li Y, Shaw CA, Sheffer I, Sule N, Powell SZ, Dawson B, Zaidi SNY, Bucasas KL, Lupski JR, Wilhelmsen KC, Doody R, Szigeti K. Integrated copy number and gene expression analysis detects a CREB1 association with Alzheimer's disease. Transl Psychiatry 2012; 2:e192. [PMID: 23168992 PMCID: PMC3565761 DOI: 10.1038/tp.2012.119] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Genetic variation, both single-nucleotide variations and copy number variations (CNV), contribute to changes in gene expression. In some cases these variations are meaningfully correlated with disease states. We hypothesized that in a genetically heterogeneous disorder such as sporadic Alzheimer's disease (AD), utilizing gene expression as a quantitative trait and CNVs as a genetic marker map within the same individuals in the context of case-control status may increase the power to detect relevant loci. Using this approach an 8-kb deletion was identified that contains a PAX6-binding site on chr2q33.3 upstream of CREB1 encoding the cAMP responsive element-binding protein1 transcription factor. The association of the CNV to AD was confirmed by a case-control association study consisting of the Texas Alzheimer Research and Care Consortium and NIA-LOAD Family Study data sets.
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Affiliation(s)
- Y Li
- Department of Neurology, Alzheimer's Disease and Memory Disorders Center, Baylor College of Medicine, Houston, TX, USA
| | - C A Shaw
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA,Department of Molecular and Human Genetics, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX, USA. E-mail:
| | - I Sheffer
- Department of Neurology, Alzheimer's Disease and Memory Disorders Center, Baylor College of Medicine, Houston, TX, USA
| | - N Sule
- Department of Pathology, Baylor College of Medicine, Houston, TX, USA
| | - S Z Powell
- Department of Neuropathology, The Methodist Hospital, Houston, TX, USA
| | - B Dawson
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA,Howard Hughes Medical Institute, Houston, TX, USA
| | - S N Y Zaidi
- Department of Neurology, Alzheimer's Disease and Memory Disorders Center, Baylor College of Medicine, Houston, TX, USA
| | - K L Bucasas
- Departmentof Immunology, Baylor College of Medicine, Houston, TX, USA
| | - J R Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA,Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - K C Wilhelmsen
- Department of Neurology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - R Doody
- Department of Neurology, Alzheimer's Disease and Memory Disorders Center, Baylor College of Medicine, Houston, TX, USA
| | - K Szigeti
- Department of Neurology, Alzheimer's Disease and Memory Disorders Center, Baylor College of Medicine, Houston, TX, USA,Department of Neurology, University at Buffalo, SUNY, Buffalo, NY, USA,Department of Neurology, University of Buffalo, SUNY, 100 High Street, Buffalo, NY 14203, USA. E-mail:
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Shaw CA, Li Y, Wiszniewska J, Chasse S, Zaidi SNY, Jin W, Dawson B, Wilhelmsen K, Lupski JR, Belmont JW, Doody RS, Szigeti K. Olfactory copy number association with age at onset of Alzheimer disease. Neurology 2011; 76:1302-9. [PMID: 21482944 DOI: 10.1212/wnl.0b013e3182166df5] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES Copy number variants (CNVs) have been recognized as a source of genetic variation that contributes to disease phenotypes. Alzheimer disease (AD) has high heritability for occurrence and age at onset (AAO). We performed a cases-only genome-wide CNV association study for age at onset of AD. METHODS The discovery case series (n = 40 subjects with AD) was evaluated using array comparative genome hybridization (aCGH). A replication case series (n = 507 subjects with AD) was evaluated using Affymetrix array (n = 243) and multiplex ligation-dependent probe amplification (n = 264). Hazard models related onset age to CNV. RESULTS The discovery sample identified a chromosomal segment on 14q11.2 (19.3-19.5 Mb, NCBI build 36, UCSC hg18 March 2006) as a region of interest (genome-wide adjusted p = 0.032) for association with AAO of AD. This region encompasses a cluster of olfactory receptors. The replication sample confirmed the association (p = 0.035). The association was found for each APOE4 gene dosage (0, 1, and 2). CONCLUSION High copy number in the olfactory receptor region on 14q11.2 is associated with younger age at onset of AD.
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Affiliation(s)
- C A Shaw
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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