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α-Synuclein pathology affecting Bergmann glia of the cerebellum in patients with α-synucleinopathies

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Abstract

We carried out immunohistochemical examinations of the brains (cerebella) of patients who had suffered from Parkinson's disease (PD), diffuse Lewy body disease (DLBD) or multiple system atrophy (MSA), using antibodies specific for α-synuclein. α-Synuclein-positive doughnut-shaped structures were found occasionally in the cerebellar molecular layer in some of these patients. Double-labeling immunofluorescence and immunoelectron microscopy studies revealed that these α-synuclein-positive doughnut-shaped structures were located in the glial fibrillary acidic protein-positive radial processes of Bergmann glia, corresponding to the outer area of Lewy body-like inclusions, and consisted of granulo-filamentous structures. These findings indicate that, although not frequently, Bergmann glia of the cerebellum are also the targets of α-synuclein pathology in α-synucleinopathies such as PD, DLBD and MSA.

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Acknowledgements

The authors are indebted to Dr. T. Iwaki, Department of Neuropathology, Kyushu University, Fukuoka, Japan, and Dr. K. Tanaka, Department of Molecular Neuroscience, Tokyo Medical and Dental University, Tokyo, Japan, for anti-αB-crystallin antibody and anti-EAAT4 antibody, respectively. We also thank J. Takasaki, C. Tanda, S. Egawa, T. Hasegawa, Y. Ota and K. Honma for their technical assistance, and M. Machida, Ms. Abe and T. Koike for their secretarial assistance. This work was supported, in part, by a grant from the Research Committee on Neurodegenerative Diseases, the Ministry of Health, Labour and Welfare, Japan, and a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

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Correspondence to Yue-Shan Piao.

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Piao, YS., Mori, F., Hayashi, S. et al. α-Synuclein pathology affecting Bergmann glia of the cerebellum in patients with α-synucleinopathies. Acta Neuropathol 105, 403–409 (2003). https://doi.org/10.1007/s00401-002-0655-0

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