Admixture mapping implicates 13q33.3 as ancestry-of-origin locus for Alzheimer disease in Hispanic and Latino populations

Alzheimer disease (AD) is the most common form of senile dementia, with high incidence late in life in many populations including Caribbean Hispanic (CH) populations. Such admixed populations, descended from more than one ancestral population, can present challenges for genetic studies, including li...

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Vydáno v:HGG advances Ročník 4; číslo 3; s. 100207
Hlavní autoři: Horimoto, Andrea R.V.R., Boyken, Lisa A., Blue, Elizabeth E., Grinde, Kelsey E., Nafikov, Rafael A., Sohi, Harkirat K., Nato, Alejandro Q., Bis, Joshua C., Brusco, Luis I., Morelli, Laura, Ramirez, Alfredo, Dalmasso, Maria Carolina, Temple, Seth, Satizabal, Claudia, Browning, Sharon R., Seshadri, Sudha, Wijsman, Ellen M., Thornton, Timothy A.
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States Elsevier Inc 13.07.2023
Elsevier
Témata:
Alzheimer disease
Alzheimer Disease - genetics
ancestry
Argentina
Caribbean
Ethnicity
gene mapping
Genetic Loci - genetics
genetic variation
Genetics
Genome-Wide Association Study
genomics
haplotype
haplotypes
Hispanic or Latino - genetics
human genetics
Humans
Latinos
local ancestry
loci
multi-ethnic
non-coding
population structure
protective
rare variation
risk
risk reduction
statistical models
whole genome sequence
Caribbean
Argentina
haplotype
population structure
local ancestry
non-coding
gene mapping
whole genome sequence
protective
multi-ethnic
rare variation
ISSN:2666-2477, 2666-2477
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Popis
Shrnutí:Alzheimer disease (AD) is the most common form of senile dementia, with high incidence late in life in many populations including Caribbean Hispanic (CH) populations. Such admixed populations, descended from more than one ancestral population, can present challenges for genetic studies, including limited sample sizes and unique analytical constraints. Therefore, CH populations and other admixed populations have not been well represented in studies of AD, and much of the genetic variation contributing to AD risk in these populations remains unknown. Here, we conduct genome-wide analysis of AD in multiplex CH families from the Alzheimer Disease Sequencing Project (ADSP). We developed, validated, and applied an implementation of a logistic mixed model for admixture mapping with binary traits that leverages genetic ancestry to identify ancestry-of-origin loci contributing to AD. We identified three loci on chromosome 13q33.3 associated with reduced risk of AD, where associations were driven by Native American (NAM) ancestry. This AD admixture mapping signal spans the FAM155A, ABHD13, TNFSF13B, LIG4, and MYO16 genes and was supported by evidence for association in an independent sample from the Alzheimer’s Genetics in Argentina—Alzheimer Argentina consortium (AGA-ALZAR) study with considerable NAM ancestry. We also provide evidence of NAM haplotypes and key variants within 13q33.3 that segregate with AD in the ADSP whole-genome sequencing data. Interestingly, the widely used genome-wide association study approach failed to identify associations in this region. Our findings underscore the potential of leveraging genetic ancestry diversity in recently admixed populations to improve genetic mapping, in this case for AD-relevant loci. We develop and implement a model for binary traits and related individuals that leverages diversity in genetic ancestry for admixture mapping. We apply the model to Hispanic Alzheimer disease samples to identify a region on chromosome 13q33.3 that contains protective sequence variants on haplotypes with ancestral native American ancestry.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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Present address: La Jolla Labs Inc., La Jolla, CA 92037, USA
Present address: Zymeworks Biopharmaceuticals, Inc., Seattle, WA 98101, USA
Present address: Division of Aging, Brigham and Women’s Hospital, Boston, MA, USA
Lead contact
ISSN:2666-2477
2666-2477
DOI:10.1016/j.xhgg.2023.100207