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Analysis of neurodegenerative Mendelian genes in clinically diagnosed Alzheimer Disease
- Source :
- PLoS Genetics, PLoS Genetics, Vol 13, Iss 11, p e1007045 (2017)
- Publication Year :
- 2017
- Publisher :
- Public Library of Science (PLoS), 2017.
-
Abstract
- Alzheimer disease (AD), Frontotemporal lobar degeneration (FTD), Amyotrophic lateral sclerosis (ALS) and Parkinson disease (PD) have a certain degree of clinical, pathological and molecular overlap. Previous studies indicate that causative mutations in AD and FTD/ALS genes can be found in clinical familial AD. We examined the presence of causative and low frequency coding variants in the AD, FTD, ALS and PD Mendelian genes, in over 450 families with clinical history of AD and over 11,710 sporadic cases and cognitive normal participants from North America. Known pathogenic mutations were found in 1.05% of the sporadic cases, in 0.69% of the cognitively normal participants and in 4.22% of the families. A trend towards enrichment, albeit non-significant, was observed for most AD, FTD and PD genes. Only PSEN1 and PINK1 showed consistent association with AD cases when we used ExAC as the control population. These results suggest that current study designs may contain heterogeneity and contamination of the control population, and that current statistical methods for the discovery of novel genes with real pathogenic variants in complex late onset diseases may be inadequate or underpowered to identify genes carrying pathogenic mutations.<br />Author summary In this study we provide further genetic evidence of the clinical, pathological and molecular overlap between neurodegenerative diseases. We screened the known Mendelian genes in Alzheimer disease (AD), Frontotemporal Dementia (FTD), Parkinson disease (PD) and Amyotrophic Lateral Sclerosis (ALS) disease in over 13,292 individuals. We report the presence of known pathogenic mutations in AD, FTD and PD genes in both sporadic and familial late onset AD cases and even cognitively normal individuals, pointing to contamination of control cohorts with asymptomatic cases. We also observed an enrichment, although not statistically significant, in most of AD, FTD and PD genes, reinforcing the idea of pathologic crossover among these diseases. However, the fact that genes carrying known pathogenic mutation do not show significant association calls for a reevaluation of current statistical methods.
- Subjects :
- Male
0301 basic medicine
Genetic Screens
Cancer Research
Heredity
Gene Identification and Analysis
Disease
Alzheimer's Disease
Pathology and Laboratory Medicine
medicine.disease_cause
Motor Neuron Diseases
0302 clinical medicine
Medicine and Health Sciences
PSEN1
Longitudinal Studies
Amyotrophic lateral sclerosis
Genetics (clinical)
Aged, 80 and over
Genetics
Movement Disorders
Parkinson Disease
Neurodegenerative Diseases
Frontotemporal lobar degeneration
Middle Aged
Pedigree
3. Good health
Neurology
Frontotemporal Dementia
symbols
Female
Pathogens
Alzheimer's disease
Research Article
Frontotemporal dementia
Adult
lcsh:QH426-470
Genotype
Biology
03 medical and health sciences
symbols.namesake
Alzheimer Disease
Mental Health and Psychiatry
Presenilin-1
medicine
Humans
Genetic Predisposition to Disease
Molecular Biology
Ecology, Evolution, Behavior and Systematics
Aged
Amyotrophic Lateral Sclerosis
Biology and Life Sciences
medicine.disease
lcsh:Genetics
030104 developmental biology
Case-Control Studies
Mutation
Genetics of Disease
Mendelian inheritance
Dementia
Frontotemporal Lobar Degeneration
Protein Kinases
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 15537404
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- PLOS Genetics
- Accession number :
- edsair.doi.dedup.....be446da886d7e896ade63a491d82b004