Description
Data Available
To access this data, please log into DSS and submit an application. Within the application, add this dataset (accession NG00117) in the “Choose a dataset” section. Once approved, you will be able to log in and access the data within the DARM portal.
Description
The NCRAD Families sample set was genotyped at the Children’s Hospital of Philadelphia using the Illumina Infinium GSAMD-24v2-0_20024620_A1 BeadChip which captures genotype data on 759,993 genomic SNPs. These families are not evaluated in person. Family history and demographic data are collected and updated annually. Clinical information is obtained through the request for medical records which are reviewed by a central neurologist and where possible, diagnosis is determined by NINCDS-ADRDA Criteria. A standardized telephone cognitive battery is completed, where possible, every 2 years. These data are also reviewed centrally along with the medical records. Subjects are contacted annually for updates on diagnoses within their family. Brain donation is coordinated for interested participants and performed centrally. Brain tissue is available from some NCRAD Family Study participants.
Sample Summary per Data Type
Sample Set | Accession | Data Type | Number of Samples |
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NCRAD Families GWAS GSA | snd10037 | GWAS | 698 |
Available Filesets
Name | Accession | Latest Release | Description |
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NCRAD Families GWAS | fsa000032 | NG00117.v1 | GWAS, Covariates, Phenotypes |
View the File Manifest for a full list of files released in this dataset.
Subject Information
The NCRAD Families sample set was genotyped at the Children's Hospital of Philadelphia using the Illumina Infinium GSAMD-24v2-0_20024620_A1 BeadChip which captures genotype data on 759,993 genomic SNPs.
Sample Set | Accession Number | Number of Subjects |
---|---|---|
NCRAD Families GWAS GSA | snd10037 | 698 |
Related Studies
Consent Levels
Consent Level | Number of Subjects |
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GRU-IRB-PUB | 698 |
Visit the Data Use Limitations page for definitions of the consent levels above.
Approved Users
- Investigator:Cruchaga, CarlosInstitution:Washington University School of MedicineProject Title:The Familial Alzheimer Sequencing (FASe) ProjectDate of Approval:May 9, 2024Request status:ApprovedResearch use statements:Show statementsTechnical Research Use Statement:The goal of this study is to identify new genes and mutations that cause or increase risk for Alzheimer disease (AD), as well as protective factors. Individuals and families were selected from the Knight-ADRC (Washington University) and the NIA-LOAD study. Only families with at least three first-degree affected individuals were included. Families with pathogenic variants in the known AD or FTD genes, or in which APOE4 segregated with disease were excluded. At least two cases and one control were selected per family. Cases had an age at onset (AAO) after 65 yo and controls had a larger age at last assessment than the latest AAO within the family. Whole exome (WES) and whole genome sequencing (WGS) was generated for 1,235 individuals (285 families) that together with data from our collaborators and the ADSP family-based cohort (3,449 individuals and 757 families) will provide enough statistical power to identify new genes for AD. Dr. Tanzi (Harvard Medical School) will provide WGS from 400 families from the NIMH Alzheimer disease genetics initiative study. We will perform single variant and gene-based analyses to identify genes and variants that increase risk for disease in AD families. Single variant analysis will consist of a combination of association and segregation analyses. We will run family-based gene-based methods to identify genes that show and overall enrichment of variants in AD cases. We will also look for protective and modifier variants. To do this we will identify families loaded with AD cases, that also include individuals with a high burden of known risk variants but that do not develop the disease (escapees). We will use the sequence data and the family structure to identify variants that segregate with the escapee phenotype. The most promising variants and genes will be replicated in independent datasets (ADSP case-control, ADNI, Knight-ADRC, NIA-LOAD ). We will perform single variant and gene-based analyses to replicate the initial findings, and survival analysis to replicate the protective variants. We will select the most promising variants/genes for functional studiesNon-Technical Research Use Statement:Family-based approaches led to the identification of disease-causing Alzheimer’s Disease (AD) variants in the genes encoding APP, PSEN1 and PSEN2. The identification of these genes led to the A?-cascade hypothesis and to the development of drugs that target this pathway. Recently, we have identified rare coding variants in TREM2, ABCA7, PLD3 and SORL1 with large effect sizes for risk for AD, confirming that rare coding variants play a role in the etiology of AD. In this proposal, we will identify rare risk and protective alleles using sequence data from families densely affected by AD. We hypothesize that these families are enriched for genetic risk factors. We already have sequence data from 695 families (2,462 individuals), that combined with the ADSP and the NIMH dataset will lead to a dataset of more than 1,042 families (4,684 individuals). Our preliminary results support the flexibility of this approach and strongly suggest that protective and risk variants with large effect size will be found, which will lead to a better understanding of the biology of the disease.
- Investigator:Hatchwell, EliInstitution:Population BioProject Title:Mutational Spectrum of Causal Genes for Neurological/Neurodegenerative Diseases and Endometriosis Identified via High Resolution Genome Wide Copy Number AnalysisDate of Approval:August 21, 2024Request status:ApprovedResearch use statements:Show statementsTechnical Research Use Statement:While single gene rare variants have been shown to play a significant role in Early-Onset Alzheimer’s Disease (EOAD), their role in Late-Onset (LOAD) has not been emphasised. The gene discovery methodology we have developed at Population Bio allows for unbiased exploration of highly informative genomic variants in any cohort of interest. Our approach is based on ultra-high resolution copy number variant (CNV) analysis. We have invested heavily in such analysis on normal populations. These are used as comparators for cohorts of interest, such as LOAD. In our LOAD work, this analysis generated a list of CNVs which were either absent in the normal populations we studied or else present at significantly higher frequency in the LOAD cohort. Such CNVs are routinely annotated to determine if they overlie known genes and/or regulatory regions. As an example, we have discovered a deletion in 3% of our LOAD cases, which is present in <= 1% of normals. This deletion disrupts a transcription factor binding site in the intron of a gene, which, via GeneHancer, is known to control exon 1 of the gene. The gene in question is novel to LOAD, and is an important metabolic gene, with known biology. It is vital that we validate this finding by analysis of independent LOAD datasets. In addition, we wish to validate other genes discovered in the same manner We have very deep experience of analyzing WGS/WES datasets. Our focus will be to pull out of the available WGS/WES datasets all the variants for the candidate genes of interest. Such variants, including SNVs, indels and CNVs (called using a variety of tools we have experience with) will be analyzed by reference to databases of normal individuals: i.CNVs, by reference to our own internal database but also gnomad (https://gnomad.broadinstitute.org) CNV data and DGV (http://dgv.tcag.ca) ii.SNVs/indels, by reference to gnomad These analyses will allow us to determine whether there exists a mutational burden for our candidate genes of interest in independent LOAD cohorts, and will serve as validation/refutation. The main phenotype of interest will be definitive diagnoses of LOAD, based on neuropathological and clinical cognitive analysesNon-Technical Research Use Statement:Most of the common conditions that affect large numbers of the general population have a genetic basis. While progress has been rapid in the field of cancer, the same cannot be said for common, non-cancer, conditions, such as Late-Onset Alzheimer's Disease (LOAD). It is pretty clear now that not all cases of LOAD represent the same disease, in terms of what is the cause. Our approach has been to consider common diseases as collections of rare subgroups, each of which has a specific cause and which, in due course, will have a specific treatment. We have pioneered and implemented a method to rapidly uncover potentially causal genes in common disorders and will use the data generated from this study to strengthen our discoveries, by validating a set of novel candidate genes we have identified in LOAD Our project will allow us to: 1.Define subsets of disease 2.Work with pharmaceutical companies to develop drugs that will specifically target each subset of disease. In some cases, disease progression may be halted by the therapies developed. In some cases, reversal and/or cure may be possible
- Investigator:Wainberg, MichaelInstitution:Sinai Health SystemProject Title:Uncovering the causal genetic variants, genes and cell types underlying brain disordersDate of Approval:September 5, 2024Request status:ApprovedResearch use statements:Show statementsTechnical Research Use Statement:We propose a multifaceted approach to elucidate and interpret genetic risk factors for Alzheimer's disease. First, we propose to perform a whole-genome sequencing meta-analysis of the Alzheimer's Disease Sequencing Project with the UK Biobank and All of Us to associate rare coding and non-coding variants with Alzheimer's disease and related dementias. We will explore a variety of case definitions in the UK Biobank and All of Us, including those based on ICD codes from electronic medical records (inpatient, primary care and/or death), self-report of Alzheimer's disease or Alzheimer's disease and related dementias, and/or family history of Alzheimer's disease or Alzheimer's disease and related dementias. We will perform single-variant, coding-variant burden, and non-coding variant burden tests using the REGENIE genome-wide association study toolkit.Second, we propose to develop statistical and machine learning models that can effectively infer (“fine-map”) the causal gene(s), variant(s), and cell type(s) underlying each association we find, as well as associations from existing genome-wide association studies and other Alzheimer's- and aging-related cohorts found in NIAGADS. In particular, we propose to improve causal gene identification by incorporating knowledge of gene function as a complement to functional genomics. For instance, we plan to develop improved methods for inferring biological networks, particularly from single-cell data, and integrate these networks with the results of the non-coding associations from our first aim to fine-map causal genes. To fine-map causal variants and cell types, we plan to integrate the associations from our first aim with single-nucleus chromatin accessibility data from postmortem brain cohorts to simultaneously infer which variant(s) are causal for each discovered locus and which cell type(s) they act through.Non-Technical Research Use Statement:We have a comprehensive plan to understand and explain the genetic factors that contribute to Alzheimer's disease. Our approach involves two main steps.First, we'll analyze genetic information from large research databases to identify rare genetic changes associated with Alzheimer's and related memory disorders. We'll look at both specific changes in genes and other parts of the genetic code. We'll use data from different studies and combine them to get a clearer picture.Second, we'll create advanced computer models that can help us figure out which specific genes, genetic changes, and cell types are responsible for these associations. This will help us pinpoint the most important factors contributing to Alzheimer's disease. We'll also analyze data from previous studies to build a more complete understanding of these genetic links.
- Investigator:Zhang, HaiyangInstitution:Vivid GenomicsProject Title:Validation and optimization of Alzheimer's Disease phenotypes prediction using machine learning enabled polygenic risk modelsDate of Approval:March 28, 2023Request status:ExpiredResearch use statements:Show statementsTechnical Research Use Statement:Analyzing postmortem phenotype and genomics data from ~1100 human brain samples with machine learning, Vivid Genomics, Inc., has developed prototype genetic biomarker assays that predict the presence of amyloid plaques, Lewy body pathology, cerebral amyloid angiopathy, and rate of cognitive decline. The objective is to increase subject numbers with similar data available through NIAGADS and NACC, along with datasets from several individual academic centers, to further optimize and validate our assays for neurodegenerative/cerebrovascular lesion types including tau, TDP-43, hippocampal sclerosis and microinfarcts, and for predicting rate of cognitive decline. NIAGADS datasets requested are NG00067 (including the newly released data which is new version 9 for dataset NG00067), NG00119, NG00117 and NG00127; data use limitations from these do not exclude our proposed usage. We are targeting >3000 subjects in total to be used for the validation of our models. We will focus on SNP selection and test the effects of different analysis strategies: 1) changing SNP p-value cutoffs 2) using LD-filtered representative SNPs with full genome coverage 3) testing the value of stratifying by APOE genotype 4) determining if it is better to add other covariates including age and sex. A fraction of the genetic data (~30%) will be withheld for validation. Optimization is defined as an area under the curve (AUC) of 80% and positive predictive value (PPV) of 80%, as well as R2 >0.75 for all assays. Values within 10% of this will be considered a successful validation. Through these assays, this project will benefit those suffering from Alzheimer’s disease and other neurodegenerative disorders by increasing clinical trial efficiency through more precise subject selection and/or stratification.Non-Technical Research Use Statement:Vivid Genomics is dedicated to developing genetic tests, typically done from DNA obtained from blood, that will predict, for any given older person, the likelihood that they have, or might develop when they become old, the characteristic brain changes of Alzheimer’s disease as well as other brain changes that affect thinking in older people. These changes include amyloid or senile plaques, tangles or tau, amyloid angiopathy, Lewy bodies, TDP-43 pathology, hippocampal sclerosis and brain infarcts (strokes). The objective of this study is to improve upon initial tests developed by Vivid, and to also develop genetic tests to predict the rate at which older people’s thinking ability decreases over time. To do this, Vivid Genomics requests human subject DNA analysis data stored at NIAGADS. Through these new genetic tests, Vivid hopes to benefit those suffering from Alzheimer’s disease and other brain diseases of aging by allowing better selection of subjects for clinical trials of these diseases, which would increase the chances of clinical trials finding useful new treatments.
- Investigator:Zhao, JinyingInstitution:University of FloridaProject Title:Identifying novel biomarkers for human complex diseases using an integrated multi-omics approachDate of Approval:November 21, 2023Request status:ApprovedResearch use statements:Show statementsTechnical Research Use Statement:GWAS, WES and WGS have identified many genes associated with Alzheimer’s Dementia (AD) and its related traits. However, the identified genes thus far collectively explain only a small proportion of disease heritability, suggesting that more genes remained to be identified. Moreover, there is a clear gender and ethnic disparity for AD susceptibility, but little research has been done to identify gender- and ethnic-specific variants associated with AD. Of the many challenges for deciphering AD pathology, lacking of efficient and power statistical methods for genetic association mapping and causal inference represents a major bottleneck. To tackle this challenge, we have developed a set of novel statistical and bioinformatics approaches for genetic association mapping and multi-omics causation inference in large-scale ethnicity-specific epidemiological studies. The goal of this project is to leverage the multi-omics and clinical data archived by the ADSP, ADNI, ADGC as well as other AD-related data repositories to identify novel genes and molecular markers for AD. Specifically, we will (1) validate our novel methods for identifying novel risk and protective genomic variants and multi-omics causal pathways of AD; (2) identify novel ethnicity- and gender-specific genes and molecular causal pathways of AD. We will share our results, statistical methods and computational software with the scientific community.Non-Technical Research Use Statement:Although many genes have been associated with Alzheimer’s Dementia (AD), these genes altogether explain only a small fraction of disease etiology, suggesting more genes remained to be identified. Of the many challenges for deciphering AD pathology, lacking of power statistical methods represents a major bottleneck. To tackle this challenge, we have developed a set of novel statistical and bioinformatics approaches for genetic association mapping and multi-omics causation inference in large-scale ethnicity-specific epidemiological studies. The goal of this project is to leverage the rich genetic and other omic data along with clinical data archived by the ADSP, ADNI, ADGC as well as other AD-related data repositories to identify novel genes and molecular markers for AD. Such results will enhance our understanding of AD pathogenesis and may also serve as biomarkers for early diagnosis and therapeutic targets.
Acknowledgement
Acknowledgment statement for any data distributed by NIAGADS:
Data for this study were prepared, archived, and distributed by the National Institute on Aging Alzheimer’s Disease Data Storage Site (NIAGADS) at the University of Pennsylvania (U24-AG041689), funded by the National Institute on Aging.
Use the study-specific acknowledgement statements below (as applicable):
For investigators using any data from this dataset:
Please cite/reference the use of NIAGADS data by including the accession NG00117.
For investigators using NCRAD Family Study (sa000025) data:
Samples from the National Centralized Repository for Alzheimer’s Disease and Related Dementias (NCRAD), which receives government support under a cooperative agreement grant (U24AG021886) awarded by the National Institute on Aging (NIA), were used in this study. We thank the participants and their families, whose help and participation made this work possible.
For use of data in ng00117: Quality control procedures and data preparation on the GWAS was conducted by the Alzheimer’s Disease Genetics Consortium (ADGC) (UO1AG032984) and the NIA Genetics of Alzheimer’s Disease Storage Site (NIAGADS) (U24-AG041689), both funded by NIA.
For use of data in ng00129: Data processing and quality control procedures on the whole-exome dataset was conducted by the Genome Center for Alzheimer’s Disease (GCAD) (U54AG052427) and the NIA Genetics of Alzheimer’s Disease Storage Site (NIAGADS) (U24-AG041689), both funded by NIA.