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Clinical and Pathological Implications

James E. Galvin, MD, MSc; Virginia M.-Y. Lee, PhD; John Q. Trojanowski, MD, PhD

Arch Neurol. 2001;58:186-190.

The synucleinopathies are a diverse group of neurodegenerative disorders that share a common pathologic lesion composed of aggregates of insoluble -synuclein protein in selectively vulnerable populations of neurons and glia. Growing evidence links the formation of abnormal filamentous aggregates to the onset and progression of clinical symptoms and the degeneration of affected brain regions in neurodegenerative disorders. These disorders may share an enigmatic symmetry, ie, missense mutations in the gene encoding for the disease protein (-synuclein) cause familial variants of Parkinson disease as well as its hallmark brain lesions, but the same brain lesions also form from the corresponding wild-type brain protein in the more common sporadic varieties of Parkinson disease. It is likely that clarification of this enigmatic symmetry in 1 form of synucleinopathy will have a profound impact on understanding the mechanisms underlying all these disorders. Furthermore, these efforts will likely lead to novel diagnostic and therapeutic strategies in regard to the synucleinopathies.

From the Alzheimer's Disease Research Center, Department of Neurology, Washington University School of Medicine, St Louis, Mo (Dr Galvin); and Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia (Drs Galvin, Lee, and Trojanowski).

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