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Zaman A, Caywood L, Prough M, Clouse J, Harrington S, Adams L, Fuzzell D, Fuzzell S, Laux R, Hochstetler SD, Ogrocki P, Lerner A, Vance JM, Haines JL, Scott WK, Pericak-Vance MA, Cuccaro ML. Psychometric Approaches to Defining Cognitive Phenotypes in the Old Order Amish. Int J Geriatr Psychiatry 2023; 38:e5903. [PMID: 36929524 DOI: 10.1002/gps.5903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 03/11/2023] [Indexed: 03/18/2023]
Abstract
OBJECTIVE Memory and cognitive problems are central to the diagnosis of Alzheimer's disease (AD). Psychometric approaches to defining phenotypes can aid in identify genetic variants associated with AD. However, these approaches have mostly been limited to affected individuals. Defining phenotypes of both affected and unaffected individuals may help identify genetic variants associated with both AD and healthy aging. This study compares psychometric methods for developing cognitive phenotypes that are more granular than clinical classifications. METHODS 682 older Old Order Amish individuals were included in the analysis. Adjusted Z-scores of cognitive tests were used to create four models including 1) global threshold scores or 2) memory threshold scores, and 3) global clusters and 4) memory clusters. An ordinal regression examined the coherence of the models with clinical classifications [cognitively impaired (CI), mildly impaired (MI), cognitively unimpaired (CU)], APOE-e4, sex, and age. An ANOVA examined the best model phenotypes for differences in clinical classification, APOE-e4, domain Z-scores (memory, language, executive function, and processing speed), sex, and age. RESULTS The memory cluster identified four phenotypes and had the best fit (χ2 = 491.66). Individuals in the worse performing phenotypes were more likely to be classified as CI or MI and to have APOE-e4. Additionally, all four phenotypes performed significantly differently from one another on the domains of memory, language, and executive functioning. CONCLUSIONS Memory cluster stratification identified the cognitive phenotypes that best aligned with clinical classifications, APOE-e4, and cognitive performance We predict these phenotypes will prove useful in searching for protective genetic variants. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Andrew Zaman
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Laura Caywood
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Michael Prough
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Jason Clouse
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Sharlene Harrington
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Larry Adams
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Denise Fuzzell
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Sarada Fuzzell
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Renee Laux
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Sherri D Hochstetler
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Paula Ogrocki
- Department of Neurology, Case Western Reserve University, Cleveland, OH, USA
| | - Alan Lerner
- Department of Neurology, Case Western Reserve University, Cleveland, OH, USA
| | - Jeffery M Vance
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA.,Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Jonathan L Haines
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA.,Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, OH, USA
| | - William K Scott
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA.,Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Margaret A Pericak-Vance
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA.,Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Michael L Cuccaro
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA.,Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, USA
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2
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Waksmunski AR, Miskimen K, Song YE, Grunin M, Laux R, Fuzzell D, Fuzzell S, Adams LD, Caywood L, Prough M, Stambolian D, Scott WK, Pericak-Vance MA, Haines JL. Consequences of a Rare Complement Factor H Variant for Age-Related Macular Degeneration in the Amish. Invest Ophthalmol Vis Sci 2022; 63:8. [PMID: 35930268 PMCID: PMC9363678 DOI: 10.1167/iovs.63.9.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Genetic variants in the complement factor H gene (CFH) have been consistently implicated in age-related macular degeneration (AMD) risk. However, their functional effects are not fully characterized. We previously identified a rare, AMD-associated variant in CFH (P503A, rs570523689) in 19 Amish individuals, but its functional consequences were not investigated. Methods We performed genotyping for CFH P503A in 1326 Amish individuals to identify additional risk allele carriers. We examined differences for age at AMD diagnosis between carriers and noncarriers. In blood samples from risk allele carriers and noncarriers, we quantified (i) CFH RNA expression, (ii) CFH protein expression, and (iii) C-reactive protein (CRP) expression. Potential changes to the CFH protein structure were interrogated computationally with Phyre2 and Chimera software programs. Results We identified 39 additional carriers from Amish communities in Ohio and Indiana. On average, carriers were younger than noncarriers at AMD diagnosis, but this difference was not significant. CFH transcript and protein levels in blood samples from Amish carriers and noncarriers were also not significantly different. CRP levels were also comparable in plasma samples from carriers and noncarriers. Computational protein modeling showed slight changes in the CFH protein conformation that were predicted to alter interactions between the CFH 503 residue and other neighboring residues. Conclusions In total, we have identified 58 risk allele carriers for CFH P503A in the Ohio and Indiana Amish. Although we did not detect significant differences in age at AMD diagnosis or expression levels of CFH in blood samples from carriers and noncarriers, we observed modest structural changes to the CFH protein through in silico modeling. Based on our functional and computational observations, we hypothesize that CFH P503A may affect CFH binding or function rather than expression, which would require additional research to confirm.
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Affiliation(s)
- Andrea R Waksmunski
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio, United States.,Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, Ohio, United States.,Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Kristy Miskimen
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Yeunjoo E Song
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Michelle Grunin
- Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, Ohio, United States.,Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Renee Laux
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Denise Fuzzell
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Sarada Fuzzell
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Larry D Adams
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Laura Caywood
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Michael Prough
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Dwight Stambolian
- Department of Ophthalmology, University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - William K Scott
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Margaret A Pericak-Vance
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Jonathan L Haines
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio, United States.,Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, Ohio, United States.,Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, United States
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3
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Haines J, D'Aoust LN, Laux R, Fuzzell D, Caywood L, Reinhart‐Mercer L, Scott W, Pericak‐Vance M. P2‐032: THE GENETIC ARCHITECTURE OF ALZHEIMER DISEASE IN THE MID‐WESTERN U.S. AMISH. Alzheimers Dement 2014. [DOI: 10.1016/j.jalz.2014.05.705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
| | | | - Renee Laux
- Case Western Reserve UniversityClevelandOhioUnited States
| | - Denise Fuzzell
- Case Western Reserve UniversityClevelandOhioUnited States
| | - Laura Caywood
- Hussman Institute for Human GenomicsMiamiFloridaUnited States
| | | | - William Scott
- Hussman Institute for Human GenomicsMiamiFloridaUnited States
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4
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Hoffman JD, Cooke Bailey JN, D'Aoust L, Cade W, Ayala-Haedo J, Fuzzell D, Laux R, Adams LD, Reinhart-Mercer L, Caywood L, Whitehead-Gay P, Agarwal A, Wang G, Scott WK, Pericak-Vance MA, Haines JL. Rare complement factor H variant associated with age-related macular degeneration in the Amish. Invest Ophthalmol Vis Sci 2014; 55:4455-60. [PMID: 24906858 DOI: 10.1167/iovs.13-13684] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
PURPOSE Age-related macular degeneration is the leading cause of blindness among the adult population in the developed world. To further the understanding of this disease, we have studied the genetically isolated Amish population of Ohio and Indiana. METHODS Cumulative genetic risk scores were calculated using the 19 known allelic associations. Exome sequencing was performed in three members of a small Amish family with AMD who lacked the common risk alleles in complement factor H (CFH) and ARMS2/HTRA1. Follow-up genotyping and association analysis was performed in a cohort of 973 Amish individuals, including 95 with self-reported AMD. RESULTS The cumulative genetic risk score analysis generated a mean genetic risk score of 1.12 (95% confidence interval [CI]: 1.10, 1.13) in the Amish controls and 1.18 (95% CI: 1.13, 1.22) in the Amish cases. This mean difference in genetic risk scores is statistically significant (P = 0.0042). Exome sequencing identified a rare variant (P503A) in CFH. Association analysis in the remainder of the Amish sample revealed that the P503A variant is significantly associated with AMD (P = 9.27 × 10(-13)). Variant P503A was absent when evaluated in a cohort of 791 elderly non-Amish controls, and 1456 non-Amish cases. CONCLUSIONS Data from the cumulative genetic risk score analysis suggests that the variants reported by the AMDGene consortium account for a smaller genetic burden of disease in the Amish compared with the non-Amish Caucasian population. Using exome sequencing data, we identified a novel missense mutation that is shared among a densely affected nuclear Amish family and located in a gene that has been previously implicated in AMD risk.
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Affiliation(s)
- Joshua D Hoffman
- Center for Human Genetics Research, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Jessica N Cooke Bailey
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States
| | - Laura D'Aoust
- Center for Human Genetics Research, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - William Cade
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States
| | - Juan Ayala-Haedo
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States
| | - Denise Fuzzell
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States
| | - Renee Laux
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States
| | - Larry D Adams
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States
| | - Lori Reinhart-Mercer
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States
| | - Laura Caywood
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States
| | - Patrice Whitehead-Gay
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States
| | - Anita Agarwal
- Department of Ophthalmology and Visual Sciences, Vanderbilt University, Nashville, Tennessee, United States
| | - Gaofeng Wang
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States
| | - William K Scott
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States
| | - Margaret A Pericak-Vance
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States
| | - Jonathan L Haines
- Center for Human Genetics Research, Vanderbilt University Medical Center, Nashville, Tennessee, United States Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States
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5
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Edwards DRV, Gilbert JR, Hicks JE, Myers JL, Jiang L, Cummings AC, Guo S, Gallins PJ, Konidari I, Caywood L, Reinhart-Mercer L, Fuzzell D, Knebusch C, Laux R, Jackson CE, Pericak-Vance MA, Haines JL, Scott WK. Linkage and association of successful aging to the 6q25 region in large Amish kindreds. Age (Dordr) 2013; 35:1467-1477. [PMID: 22773346 PMCID: PMC3705095 DOI: 10.1007/s11357-012-9447-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Accepted: 06/11/2012] [Indexed: 06/01/2023]
Abstract
Successful aging (SA) is a multidimensional phenotype involving living to older age with high physical function, preserved cognition, and continued social engagement. Several domains underlying SA are heritable, and identifying health-promoting polymorphisms and their interactions with the environment could provide important information regarding the health of older adults. In the present study, we examined 263 cognitively intact Amish individuals age 80 and older (74 SA and 189 "normally aged") all of whom are part of a single 13-generation pedigree. A genome-wide association study of 630,309 autosomal single nucleotide polymorphisms (SNPs) was performed and analyzed for linkage using multipoint analyses and for association using the modified quasi-likelihood score test. There was evidence for linkage on 6q25-27 near the fragile site FRA6E region with a dominant model maximum multipoint heterogeneity LOD score = 3.2. The 1-LOD-down support interval for this linkage contained one SNP for which there was regionally significant evidence of association (rs205990, p = 2.36 × 10(-5)). This marker survived interval-wide Bonferroni correction for multiple testing and was located between the genes QKI and PDE10A. Other areas of chromosome 6q25-q27 (including the FRA6E region) contained several SNPs associated with SA (minimum p = 2.89 × 10(-6)). These findings suggest potentially novel genes in the 6q25-q27 region linked and associated with SA in the Amish; however, these findings should be verified in an independent replication cohort.
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Affiliation(s)
- Digna R. Velez Edwards
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
- />Center for Human Genetics Research, Vanderbilt University Epidemiology Center, Institute of Medicine and Public Health, Department of Obstetrics and Gynecology, Vanderbilt University, Nashville, TN USA
| | - John R. Gilbert
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
| | - James E. Hicks
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
| | - Jamie L. Myers
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
| | - Lan Jiang
- />Center for Human Genetics Research, Vanderbilt University, Nashville, TN USA
| | - Anna C. Cummings
- />Center for Human Genetics Research, Vanderbilt University, Nashville, TN USA
| | - Shengru Guo
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
| | - Paul J. Gallins
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
| | - Ioanna Konidari
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
| | - Laura Caywood
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
| | - Lori Reinhart-Mercer
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
| | - Denise Fuzzell
- />Center for Human Genetics Research, Vanderbilt University, Nashville, TN USA
| | - Claire Knebusch
- />Center for Human Genetics Research, Vanderbilt University, Nashville, TN USA
| | - Renee Laux
- />Center for Human Genetics Research, Vanderbilt University, Nashville, TN USA
| | | | - Margaret A. Pericak-Vance
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
| | - Jonathan L. Haines
- />Center for Human Genetics Research, Vanderbilt University, Nashville, TN USA
| | - William K. Scott
- />Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute of Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, Room 414, Miami, FL 33136 USA
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6
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D'Aoust L, Cummings A, Jiang L, Laux R, Fuzzell D, Caywood L, Reinhart‐Mercer L, Scott W, Pericak‐Vance M, Haines J. P1–064: Identification of variants that confer susceptibility to Alzheimer's disease in the Amish through exome sequencing. Alzheimers Dement 2013. [DOI: 10.1016/j.jalz.2013.05.285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Laura D'Aoust
- Vanderbilt University Nashville Tennessee United States
| | - Anna Cummings
- Center for Human Genetics Research Nashville Tennessee United States
| | - Lan Jiang
- Vanderbilt University Nashville Tennessee United States
| | - Renee Laux
- Center for Human Genetics Research Nashville Tennessee United States
| | - Denise Fuzzell
- Center for Human Genetics Research Nashville Tennessee United States
| | - Laura Caywood
- Hussman Institute for Human Genomics Miami Florida United States
| | | | - William Scott
- Hussman Institute for Human Genomics Miami Florida United States
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7
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Cummings AC, Jiang L, Velez Edwards DR, McCauley JL, Laux R, McFarland LL, Fuzzell D, Knebusch C, Caywood L, Reinhart-Mercer L, Nations L, Gilbert JR, Konidari I, Tramontana M, Cuccaro ML, Scott WK, Pericak-Vance MA, Haines JL. Genome-wide association and linkage study in the Amish detects a novel candidate late-onset Alzheimer disease gene. Ann Hum Genet 2012; 76:342-51. [PMID: 22881374 DOI: 10.1111/j.1469-1809.2012.00721.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To identify novel late-onset Alzheimer disease (LOAD) risk genes, we have analysed Amish populations of Ohio and Indiana. We performed genome-wide SNP linkage and association studies on 798 individuals (109 with LOAD). We tested association using the Modified Quasi-Likelihood Score test and also performed two-point and multipoint linkage analyses. We found that LOAD was significantly associated with APOE (P= 9.0 × 10-6) in all our ascertainment regions except for the Adams County, Indiana, community (P= 0.55). Genome-wide, the most strongly associated SNP was rs12361953 (P= 7.92 × 10-7). A very strong, genome-wide significant multipoint peak [recessive heterogeneity multipoint LOD (HLOD) = 6.14, dominant HLOD = 6.05] was detected on 2p12. Three additional loci with multipoint HLOD scores >3 were detected on 3q26, 9q31 and 18p11. Converging linkage and association results, the most significantly associated SNP under the 2p12 peak was at rs2974151 (P= 1.29 × 10-4). This SNP is located in CTNNA2, which encodes catenin alpha 2, a neuronal-specific catenin known to have function in the developing brain. These results identify CTNNA2 as a novel candidate LOAD gene, and implicate three other regions of the genome as novel LOAD loci. These results underscore the utility of using family-based linkage and association analyses in isolated populations to identify novel loci for traits with complex genetic architecture.
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Affiliation(s)
- Anna C Cummings
- Center for Human Genetics Research, Vanderbilt University Medical Center, Nashville, TN, USA
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8
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Cummings A, Shaffer C, Jiang L, Laux R, Fuzzell D, Knebusch C, Reinhart‐Mercer L, Caywood L, Jackson C, Scott W, Pericak‐Vance M, Haines J. P4‐088: Sequence analysis of CTNNA2 and LRRTM1 for late‐onset Alzheimer's disease in the Amish. Alzheimers Dement 2012. [DOI: 10.1016/j.jalz.2012.05.1790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Anna Cummings
- Center for Human Genetics ResearchNashvilleTennesseeUnited States
| | | | - Lan Jiang
- Center for Human Genetics ResearchNashvilleTennesseeUnited States
| | - Renee Laux
- Center for Human Genetics ResearchNashvilleTennesseeUnited States
| | - Denise Fuzzell
- Center for Human Genetics ResearchNashvilleTennesseeUnited States
| | - Clare Knebusch
- Center for Human Genetics ResearchNashvilleTennesseeUnited States
| | | | - Laura Caywood
- Hussman Institute for Human GenomicsMiamiFloridaUnited States
| | | | - William Scott
- Hussman Institute for Human GenomicsMiamiFloridaUnited States
| | | | - Jonathan Haines
- Center for Human Genetics ResearchNashvilleTennesseeUnited States
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9
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Edwards DRV, Gilbert JR, Jiang L, Gallins PJ, Caywood L, Creason M, Fuzzell D, Knebusch C, Jackson CE, Pericak-Vance MA, Haines JL, Scott WK. Successful aging shows linkage to chromosomes 6, 7, and 14 in the Amish. Ann Hum Genet 2011; 75:516-28. [PMID: 21668908 DOI: 10.1111/j.1469-1809.2011.00658.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Successful aging (SA) is a multidimensional phenotype involving preservation of cognitive ability, physical function, and social engagement throughout life. Multiple components of SA are heritable, supporting a genetic component. The Amish are genetically and socially isolated with homogeneous lifestyles, making them a suitable population for studying the genetics of SA. DNA and measures of SA were collected on 214 cognitively intact Amish individuals over age 80. Individuals were grouped into a 13-generation pedigree using the Anabaptist Genealogy Database. A linkage screen of 5944 single nucleotide polymorphisms (SNPs) was performed using 12 informative subpedigrees with an affected-only 2-point and multipoint linkage analysis. Eleven SNPs produced 2-point LOD scores >2, suggestive of linkage. Multipoint linkage analyses, allowing for heterogeneity, detected significant LOD scores on chromosomes 6 (HLOD = 4.50), 7 (LOD*= 3.11), and 14 (HLOD = 4.17), suggesting multiple new loci underlying SA.
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Affiliation(s)
- Digna R Velez Edwards
- Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, FL, USA
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10
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Cummings A, Haines J, Pericak‐Vance M, Laux R, Jiang L, Edwards DV, McFarland L, Caywood L, Reinhart‐Mercer L, Fuzzell D, Knebusch C, Jackson C, McCauley J, Scott W. O1‐01‐01: Genome‐wide study for Alzheimer's disease in the Amish. Alzheimers Dement 2011. [DOI: 10.1016/j.jalz.2011.05.225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
| | | | | | | | - Lan Jiang
- Vanderbilt UniversityNashvilleTennessee
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11
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Cummings A, Jiang L, Edwards DV, Laux R, McFarland L, Gallins P, Caywood L, Creason M, Fuzzell D, Knebusch C, Tramontana M, Slifer M, Jackson C, Scott W, Pericak-Vance M, McCauley J, Haines J. O1‐03‐04: Genome‐wide linkage study in the Amish shows evidence for a chromosome 3 locus in late‐onset Alzheimer's disease. Alzheimers Dement 2010. [DOI: 10.1016/j.jalz.2010.05.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- A.C. Cummings
- Center for Human Genetics Research Vanderbilt University Medical CenterNashville TN USA
| | - L. Jiang
- Center for Human Genetics Research Vanderbilt University Medical CenterNashville TN USA
| | - D. Velez Edwards
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | - R. Laux
- Center for Human Genetics Research Vanderbilt University Medical CenterNashville TN USA
| | - L.L. McFarland
- Center for Human Genetics Research Vanderbilt University Medical CenterNashville TN USA
| | - P.J. Gallins
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | - L. Caywood
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | - M. Creason
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | - D. Fuzzell
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | - C. Knebusch
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | - M.G. Tramontana
- Center for Human Genetics Research Vanderbilt University Medical CenterNashville TN USA
| | - M.A. Slifer
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | | | - W.K. Scott
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | - M.A. Pericak-Vance
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | - J.L. McCauley
- Hussman Institute for Human Genomics University of Miami Miller School of MedicineMiami FL USA
| | - J.L. Haines
- Center for Human Genetics Research Vanderbilt University Medical CenterNashville TN USA
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Cummings A, Jiang L, Edwards DV, Laux R, McFarland L, Gallins P, Caywood L, Creason M, Fuzzell D, Knebusch C, Tramontana M, Slifer M, Jackson C, Scott W, Pericak-Vance M, McCauley J, Haines J. P1‐100: Genome‐wide association study for late‐onset Alzheimer's disease in the Mid‐Western U.S. Amish. Alzheimers Dement 2010. [DOI: 10.1016/j.jalz.2010.05.648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A.C. Cummings
- Center for Human Genetics Research, Vanderbilt University Medical CenterNashville TN USA
| | - L. Jiang
- Center for Human Genetics Research, Vanderbilt University Medical CenterNashville TN USA
| | - D. Velez Edwards
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | - R. Laux
- Center for Human Genetics Research, Vanderbilt University Medical CenterNashville TN USA
| | - L.L. McFarland
- Center for Human Genetics Research, Vanderbilt University Medical CenterNashville TN USA
| | - P.J. Gallins
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | - L. Caywood
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | - M. Creason
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | - D. Fuzzell
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | - C. Knebusch
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | - M.G. Tramontana
- Center for Human Genetics Research, Vanderbilt University Medical CenterNashville TN USA
| | - M.A. Slifer
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | | | - W.K. Scott
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | - M.A. Pericak-Vance
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | - J.L. McCauley
- Hussman Institute for Human Genomics, University of Miami, Miller School of MedicineMiami FL USA
| | - J.L. Haines
- Center for Human Genetics Research, Vanderbilt University Medical CenterNashville TN USA
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