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Objective: This study aimed to investigate the contribution of CD3 epsilon (e) epitope and oxidative type of copper-zinc superoxide dismutase to the degeneration processes of cerebellar Purkinje cells in patients with Multiple System Atrophy-Cerebellar type (MSA-C). Methods: This retrospective study was carried out on autopsy specimens of 17 patients with sporadic MSA-C and 10 normal individuals. Paraffin sections of autopsied cerebella and pontes were immunostained with polyclonal antibodies against CD3 e epitope and oxidative modification to cysteine sulfonic acid of cys111 in human copper-zinc superoxide dismutase (Ox-SOD1). With respect to the areas of CD3-e-epitope expression, the immunohistochemical study and the quantitative statistical analysis between the areas of CD3-e-epitope expression in the surviving Purkinje cells of MSA-C patients and their disease duration were performed. Results: The cell bodies and dendritic arborization including primary, secondary, and tertiary dendrites of normal Purkinje cells were intensely immunostained by the antibody against CD3 e epitope. Both the immunohistochemical study and the quantitative statistical analysis revealed that the areas positive for CD3 e epitope disappeared in the order from tertiary dendrites, secondary dendrites, primary dendrites toward the cell bodies, along with the disease progression. In addition, Glial Cytoplasmic Inclusions (GCIs) and Neuronal Cytoplasmic Inclusions (NCIs) were strongly positive for CD3 e epitope. The surviving Purkinje cells in MSA-C showed immunostaining by the anti-Ox-SOD1 antibody, although normal Purkinje cells did not. Conclusion: Based on the oxidative stress that the surviving Purkinje cells in MSA-C express Ox-SOD1, the functions of morphogenesis and morphological maintenance related to CD3-e-epitope expression of the MSA-C Purkinje cells are impaired from the peripheral dendrites toward the cell bodies as the center of the Purkinje cell system. In addition, GCIs and NCIs that are pathological hallmarks of MSA also intensely express CD3 e epitope.

world journal of neuroscience

Contribution of CD3 &amp;lt;i&amp;gt;ε&amp;lt;/i&amp;gt; Epitope and Oxidative Type of Copper-Zinc Superoxide Dismutase to the Degeneration Processes of Cerebellar Purkinje Cells in Patients with Multiple System Atrophy-Cerebellar Type (MSA-C: Olivopontocerebellar Atrophy, OPCA): An Immunohistochemical Study