Reduced Bergmann glial process terminations and lateral appendages in essential tremor.

Autor: Ruff DS; Department of Neurology, Columbia University, New York, New York, 10032, USA.; Initiative for Columbia Ataxia and Tremor, Columbia University, New York, New York, 10032, USA., Balbo I; Department of Neurology, Columbia University, New York, New York, 10032, USA.; Initiative for Columbia Ataxia and Tremor, Columbia University, New York, New York, 10032, USA., Lai RY; Department of Neurology, Columbia University, New York, New York, 10032, USA.; Initiative for Columbia Ataxia and Tremor, Columbia University, New York, New York, 10032, USA., Dieng D; Department of Neurology, Columbia University, New York, New York, 10032, USA.; Initiative for Columbia Ataxia and Tremor, Columbia University, New York, New York, 10032, USA., Hennessey C; Department of Neurology, Columbia University, New York, New York, 10032, USA.; Initiative for Columbia Ataxia and Tremor, Columbia University, New York, New York, 10032, USA., Vennam K; Department of Neurology, Columbia University, New York, New York, 10032, USA.; Initiative for Columbia Ataxia and Tremor, Columbia University, New York, New York, 10032, USA., Dwork AJ; Department of Pathology and Cell Biology, Columbia University Medical Center, The New York Presbyterian Hospital, New York, New York, 10032, USA.; Department of Psychiatry, Columbia University, New York, New York, USA., McCreary M; Department of Neurology, University of Texas Southwestern, Dallas, Texas, 75390, USA., Louis ED; Department of Neurology, University of Texas Southwestern, Dallas, Texas, 75390, USA., Faust PL; Initiative for Columbia Ataxia and Tremor, Columbia University, New York, New York, 10032, USA.; Department of Pathology and Cell Biology, Columbia University Medical Center, The New York Presbyterian Hospital, New York, New York, 10032, USA., Kuo SH; Department of Neurology, Columbia University, New York, New York, 10032, USA.; Initiative for Columbia Ataxia and Tremor, Columbia University, New York, New York, 10032, USA.
Jazyk: angličtina
Zdroj: Annals of clinical and translational neurology [Ann Clin Transl Neurol] 2024 Feb; Vol. 11 (2), pp. 377-388. Date of Electronic Publication: 2023 Dec 14.
DOI: 10.1002/acn3.51958
Abstrakt: Objective: Postmortem examination of the essential tremor cerebellum has revealed a variety of pathological changes centered in and around Purkinje cells. Studies have predominantly focused on cerebellar neuronal connections. Bergmann glial morphology has not yet been studied in essential tremor. Among their many roles, Bergmann glia in the cerebellar cortex ensheath Purkinje cell synapses and provide neuroprotection. Specifically, the complex radial processes and lateral appendages of Bergmann glia are structural domains that modulate Purkinje cell synaptic transmission. In this study, we investigate whether Bergmann glia morphology is altered in the essential tremor cerebellum.
Methods: We applied the Golgi-Kopsch method and used computerized three-dimensional cell reconstruction to visualize Bergmann glia in the postmortem cerebellum of 34 cases and 17 controls. We quantified morphology of terminal structures (number of terminations and lateral appendage density) and morphology of radial processes (total process length, branch length, branch order, and branch volume) in each glial cell. We quantified number of branches and volume as well.
Results: Essential tremor cases had a 31.9% decrease in process terminations and a 35.7% decrease in lateral appendage density in Bergmann glia. Total process length and branch length did not differ between essential tremor cases and controls. We found also a reduction in number of secondary and tertiary branches and tertiary branches volume.
Interpretation: These findings suggest that Bergmann glia in essential tremor cases have more alterations in their terminal structures, with a relative preservation of radial processes, and highlight a potential role for these astrocytes in the disease pathophysiology.
(© 2023 The Authors. Annals of Clinical and Translational Neurology published by Wiley Periodicals LLC on behalf of American Neurological Association.)
Databáze: MEDLINE
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