The association between mutations in the lysosomal protein glucocerebrosidase and parkinsonism

• Published in: Movement disorders 2009-08, Vol.24 (11), p.1571-1578
• Main Authors: DePaolo, John, Goker-Alpan, Ozlem, Samaddar, Ted, Lopez, Grisel, Sidransky, Ellen
• Format: Article
• Language: English
• Subjects: Adult; Aged; alpha-Synuclein - genetics; alpha-Synuclein - metabolism; Biological and medical sciences; Child; Degenerative and inherited degenerative diseases of the nervous system. Leukodystrophies. Prion diseases; DNA Mutational Analysis; Enzyme Replacement Therapy; Ethnic Groups - genetics; Female; Gaucher disease; Gaucher Disease - drug therapy; Gaucher Disease - epidemiology; Gaucher Disease - genetics; Gaucher Disease - pathology; Genetic Counseling; Genetic Predisposition to Disease; glucocerebrosidase; Glucosylceramidase - genetics; Glucosylceramidase - therapeutic use; Hippocampus - pathology; Humans; Lewy Body Disease - epidemiology; Lewy Body Disease - genetics; Lysosomes - enzymology; Male; Medical sciences; Middle Aged; Mutation; Neurology; Parkinsonian Disorders - enzymology; Parkinsonian Disorders - epidemiology; Parkinsonian Disorders - genetics; Parkinsonian Disorders - pathology; parkinsonism; risk factor; Risk Factors; Substantia Nigra - pathology; synucleinopathies
• ISSN: 0885-3185; 1531-8257
• DOI: 10.1002/mds.22538

A body of work has emerged over the past decade demonstrating a relationship between mutations in glucocerebrosidase gene (GBA), the gene implicated in Gaucher disease (GD), and the development of parkinsonism. Several different lines of research support this relationship. First, patients with GD who are homozygous for mutations in GBA have a higher than expected propensity to develop Parkinson's disease (PD). Furthermore, carriers of GBA mutations, particularly family members of patients with GD, have displayed an increased rate of parkinsonism. Subsequently, investigators from centers around the world screened cohorts of patients with parkinsonism for GBA mutations and found that overall, subjects with PD, as well as other Lewy body disorders, have at least a fivefold increase in the number of carriers of GBA mutations as compared to age‐matched controls. In addition, neuropathologic studies of subjects with parkinsonism carrying GBA mutations demonstrate Lewy bodies, depletion of neurons of the substantia nigra, and involvement of hippocampal layers CA2–4. Although the basis for this association has yet to be elucidated, evidence continues to support the role of GBA as a PD risk factor across different centers, synucleinopathies, and ethnicities. Further studies of the association between GD and parkinsonism will stimulate new insights into the pathophysiology of the two disorders and will prove crucial for both genetic counseling of patients and family members and the design of relevant therapeutic strategies for specific patients with parkinsonism. © 2009 Movement Disorder Society