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Exploring the link between glucocerebrosidase mutations and parkinsonism
Wendy Westbroek1, Ann Marie Gustafson, Ellen Sidransky
1Section on Molecular Neurogenetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.
Trends in Molecular Medicine
|July 5, 2011
Summary
Mutations in the glucocerebrosidase (GBA) gene increase Parkinson disease (PD) risk. GBA mutations are linked to Gaucher disease (GD) and parkinsonism, with carriers showing PD symptoms and Lewy bodies.
Area of Science:
- Neurogenetics
- Lysosomal Storage Diseases
- Neurodegenerative Disorders
Background:
- Mutations in glucocerebrosidase (GBA) are associated with Gaucher disease (GD).
- GBA mutations are increasingly recognized as a significant genetic risk factor for Parkinson disease (PD).
- Parkinsonism is observed in some individuals with GD and in carriers of GBA mutations.
Purpose of the Study:
- To explore the genetic and pathological links between GBA mutations and Parkinson disease.
- To review proposed mechanisms underlying the association between GBA mutations and PD phenotypes.
- To highlight the implications for understanding lysosomal function and developing therapeutic strategies.
Main Methods:
- Review of clinical, genetic, and pathological studies.
- Analysis of the prevalence of GBA mutations in PD patients.
- Examination of phenotypic diversity in GBA mutation carriers with parkinsonism.
Main Results:
- An increased frequency of GBA mutations is found in subjects with PD.
- GBA mutation carriers can exhibit varied parkinsonian symptoms.
- Glucocerebrosidase-positive Lewy bodies are present in GBA-mutation carriers with PD.
Conclusions:
- The association between GBA mutations and PD is complex and multifactorial.
- Potential mechanisms include protein aggregation, altered lipid metabolism, and impaired cellular trafficking pathways.
- Further research into these pathways may reveal novel therapeutic targets for PD and related disorders.
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