This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Over the next several years, genetic research will greatly impact patient care for individuals with Alzheimer's disease (AD), leading to new diagnostic tools and biological interventions to delay or prevent disease onset. Our goal is to identify novel genetic loci that influence the initiation or progression of AD. Toward this end, we evaluated a genome scan of 262 affected sib pairs (ASPs) collected as part of the NIMH AD Genetics Initiative, and included ApoE genotype and age as covariates. We identified two regions with peak lod scores of 5.54 and 4.09, where the oldest ASPs have the highest recurrence risk, and are most likely to share the regions identical-by-descent. These regions are on chromosome 21 near the APP locus (Olson, Goddard & Dudek, 2001), and on chromosome 20p (Olson, Goddard & Dudek, 2002).
Our aim i s to identify candidate genes in these regions and others as additional candidate regions are identified. We have established collaborations with NIMH, the Oregon Brain and Aging Study (OBAS), and the Aging and Memory Center at CWRU (UMAC) to continue these investigations into the genetics of AD. Recently, we reported evidence of linkage on chromosome 20 for AD using a novel statistical approach to incorporate covariates (e.g., age, ApoE genotype) into the analysis. These results suggest that very elderly subjects (85 years), and individuals who carry an e2 allele at the ApoE locus are more likely to be linked to this candidate region. The region on chromosome 20 includes a strong candidate gene, cystatin C (CST3), which has previously been associated with AD in case-control studies. We investigated these findings further by genotyping additional markers to narrow the candidate region, and to identify evidence of linkage disequilibrium as additional support for a susceptibility locus on chromosome 20 (Goddard et al.2004). We selected 43 elderly sibships (89 subjects) from the NIMH AD Genetics Initiative based on current age older than 84 years, and identified 129 unrelated control subjects who were older than 84 years from the Oregon Brain Aging Study to conduct linkage and association studies in this region. Fourteen additional markers were evaluated, including four markers located within or near CST3. We narrowed the candidate region on chromosome 20 to an 11.8 cM region between markers D20S174 and D20S471, which includes the CST3 candidate gene. In addition, we observed evidence of association for markers located near the CST3 candidate gene, with p-values between 0.002 and 0.08 for two-locus haplotypes. These results support the presence of a susceptibility locus for AD in the vicinity of CST3 for very elderly subjects with AD.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
2P41RR003655-21
Application #
7420624
Study Section
Special Emphasis Panel (ZRG1-GGG-J (40))
Project Start
2006-08-01
Project End
2007-07-31
Budget Start
2006-08-01
Budget End
2007-07-31
Support Year
21
Fiscal Year
2006
Total Cost
$7,388
Indirect Cost
Name
Case Western Reserve University
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
077758407
City
Cleveland
State
OH
Country
United States
Zip Code
44106
Elston, Robert C; Satagopan, Jaya; Sun, Shuying (2017) Statistical Genetic Terminology. Methods Mol Biol 1666:1-9
Thota, Prashanthi N; Zackria, Shamiq; Sanaka, Madhusudhan R et al. (2017) Racial Disparity in the Sex Distribution, the Prevalence, and the Incidence of Dysplasia in Barrett's Esophagus. J Clin Gastroenterol 51:402-406
Liang, Jingjing; Cade, Brian E; Wang, Heming et al. (2016) Comparison of Heritability Estimation and Linkage Analysis for Multiple Traits Using Principal Component Analyses. Genet Epidemiol 40:222-32
Wang, Chuchu; Wu, Manman; Qian, Jin et al. (2016) Identification of rare variants in TNNI3 with atrial fibrillation in a Chinese GeneID population. Mol Genet Genomics 291:79-92
Lemas, Dominick J; Klimentidis, Yann C; Aslibekyan, Stella et al. (2016) Polymorphisms in stearoyl coa desaturase and sterol regulatory element binding protein interact with N-3 polyunsaturated fatty acid intake to modify associations with anthropometric variables and metabolic phenotypes in Yup'ik people. Mol Nutr Food Res 60:2642-2653
Day, Kenneth; Waite, Lindsay L; Alonso, Arnald et al. (2016) Heritable DNA Methylation in CD4+ Cells among Complex Families Displays Genetic and Non-Genetic Effects. PLoS One 11:e0165488
Justice, Cristina M; Bishop, Kevin; Carrington, Blake et al. (2016) Evaluation of IRX Genes and Conserved Noncoding Elements in a Region on 5p13.3 Linked to Families with Familial Idiopathic Scoliosis and Kyphosis. G3 (Bethesda) 6:1707-12
Petrovic, Dusan; Pivin, Edward; Ponte, Belen et al. (2016) Sociodemographic, behavioral and genetic determinants of allostatic load in a Swiss population-based study. Psychoneuroendocrinology 67:76-85
Reed, Robert M; Reed, Anna W; McArdle, Patrick F et al. (2015) Vitamin and supplement use among old order amish: sex-specific prevalence and associations with use. J Acad Nutr Diet 115:397-405.e3
Djami-Tchatchou, Arnaud T; Norton, Gavin R; Raymond, Andrew et al. (2015) Intrafamilial Aggregation and Heritability of Aortic Reflected (Backward) Waves Derived From Wave Separation Analysis. Am J Hypertens 28:1427-33

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