Abstract
α-Synuclein is a major constituent of Lewy bodies, the fibrillar aggregates that form within neurons in Parkinson’s disease and dementia with Lewy bodies (DLB). Recent biochemical data show that α-synuclein accumulates in Parkinson’s disease in a detergent insoluble form. We now examine the relationship between detergent insoluble α-synuclein and the presence of Lewy bodies, clinical measures of dementia and biochemical parameters in a series of individuals with DLB. We found that Triton X-100 insoluble α-synuclein enriched nearly twofold in the temporal cortex of patients with DLB compared to age-matched controls. By contrast the total amount of α-synuclein protein was unchanged. Surprisingly, the degree of Triton X-100 insoluble α-synuclein did not correlate with either the duration of illness or the number of Lewy bodies counted using stereological methods from an adjacent block of tissue. However, the Triton X-100 soluble fraction of α-synuclein did correlate strongly with the expression of several heat shock proteins (HSPs) in DLB but not control cases, suggesting a coordinated HSP response in DLB neocortex.
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Acknowledgements
Supported by P50-NS38372, P50 AG05134, NIH AG05134, DFG-KL1395/2-1 and by a gift from the Zimbaum Foundation. We thank the ADRC Brain Bank for access to tissue.
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Klucken, J., Ingelsson, M., Shin, Y. et al. Clinical and biochemical correlates of insoluble α-synuclein in dementia with Lewy bodies. Acta Neuropathol 111, 101–108 (2006). https://doi.org/10.1007/s00401-005-0027-7
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DOI: https://doi.org/10.1007/s00401-005-0027-7