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Updated: May 7, 2026
15:09
The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease
Published on: October 3, 2012
Genetic comorbidities in Parkinson's disease
Mike A Nalls1, Mohamad Saad, Alastair J Noyce
1Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.
Human Molecular Genetics
|September 24, 2013
Summary
This study reveals a significant genetic link between Parkinson's disease (PD) and both schizophrenia and Crohn's disease. These findings suggest shared genetic factors contribute to the risk of developing these conditions.
Area of Science:
- Neurogenetics
- Complex disease genetics
- Epidemiology
Background:
- Parkinson's disease (PD) has established genetic risk factors.
- Epidemiological studies suggest intermediate factors may increase PD risk.
- Understanding genetic comorbidity can elucidate disease mechanisms.
Purpose of the Study:
- To investigate genetic comorbidity between Parkinson's disease and other conditions.
- To identify shared genetic risk profiles using genome-wide association studies (GWAS).
- To explore functional consequences of shared genetic variants in the brain.
Main Methods:
- Constructed genetic risk profiles using GWAS loci for specific phenotypes.
- Performed systematic review and conditional analyses.
- Examined brain methylation and expression signatures near associated loci.
Main Results:
- Identified significant genetic associations between PD risk and genetic profiles for schizophrenia and Crohn's disease.
- Found that overlapping loci for PD and schizophrenia largely explain their shared comorbidity.
- Observed that genetic variation outside known proximal loci contributes to PD and Crohn's disease comorbidity.
Conclusions:
- Demonstrated a strong genetically defined comorbidity between Parkinson's disease and schizophrenia.
- Showcased a significant genetic comorbidity between Parkinson's disease and Crohn's disease.
- Inferred likely functional consequences of associated variants in brain tissue.
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