Paraneoplastic Cerebellar Degeneration With P/Q-VGCC vs Yo Autoantibodies.
Journal
Neurology(R) neuroimmunology & neuroinflammation
ISSN: 2332-7812
Titre abrégé: Neurol Neuroimmunol Neuroinflamm
Pays: United States
ID NLM: 101636388
Informations de publication
Date de publication:
07 2022
07 2022
Historique:
received:
31
01
2022
accepted:
14
04
2022
entrez:
7
9
2022
pubmed:
8
9
2022
medline:
11
9
2022
Statut:
epublish
Résumé
Paraneoplastic cerebellar degeneration (PCD) is characterized by a widespread loss of Purkinje cells (PCs) and may be associated with autoantibodies against intracellular antigens such as Yo or cell surface neuronal antigens such as the P/Q-type voltage-gated calcium channel (P/Q-VGCC). Although the intracellular location of the target antigen in anti-Yo-PCD supports a T cell-mediated pathology, the immune mechanisms in anti-P/Q-VGCC-PCD remain unclear. In this study, we compare neuropathologic characteristics of PCD with anti-P/Q-VGCC and anti-Yo autoantibodies in an archival autopsy cohort. We performed neuropathology, immunohistochemistry, and multiplex immunofluorescence on formalin-fixed and paraffin-embedded brain tissue of 1 anti-P/Q-VGCC, 2 anti-Yo-PCD autopsy cases and controls. Anti-Yo-PCD revealed a diffuse and widespread PC loss together with microglial nodules with pSTAT1 Anti-Yo-PCD showed characteristic features of a T cell-mediated pathology, whereas this was not observed in 1 case of anti-P/Q-VGCC-PCD. Our findings support a pathogenic role of anti-P/Q-VGCC autoantibodies in causing neuronal dysfunction, probably due to altered synaptic transmission resulting in calcium dysregulation and subsequent PC death. Because disease progression may lead to irreversible PC loss, anti-P/Q-VGCC-PCD patients could benefit from early oncologic and immunologic therapies.
Sections du résumé
BACKGROUND AND OBJECTIVES
Paraneoplastic cerebellar degeneration (PCD) is characterized by a widespread loss of Purkinje cells (PCs) and may be associated with autoantibodies against intracellular antigens such as Yo or cell surface neuronal antigens such as the P/Q-type voltage-gated calcium channel (P/Q-VGCC). Although the intracellular location of the target antigen in anti-Yo-PCD supports a T cell-mediated pathology, the immune mechanisms in anti-P/Q-VGCC-PCD remain unclear. In this study, we compare neuropathologic characteristics of PCD with anti-P/Q-VGCC and anti-Yo autoantibodies in an archival autopsy cohort.
METHODS
We performed neuropathology, immunohistochemistry, and multiplex immunofluorescence on formalin-fixed and paraffin-embedded brain tissue of 1 anti-P/Q-VGCC, 2 anti-Yo-PCD autopsy cases and controls.
RESULTS
Anti-Yo-PCD revealed a diffuse and widespread PC loss together with microglial nodules with pSTAT1
DISCUSSION
Anti-Yo-PCD showed characteristic features of a T cell-mediated pathology, whereas this was not observed in 1 case of anti-P/Q-VGCC-PCD. Our findings support a pathogenic role of anti-P/Q-VGCC autoantibodies in causing neuronal dysfunction, probably due to altered synaptic transmission resulting in calcium dysregulation and subsequent PC death. Because disease progression may lead to irreversible PC loss, anti-P/Q-VGCC-PCD patients could benefit from early oncologic and immunologic therapies.
Identifiants
pubmed: 36070310
pii: 9/4/e200006
doi: 10.1212/NXI.0000000000200006
pmc: PMC9278121
pii:
doi:
Substances chimiques
Antibodies, Neoplasm
0
Autoantibodies
0
Calcium Channels, Q-Type
0
Immunoglobulin G
0
Nerve Tissue Proteins
0
anti-Yo autoantibodies
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Austrian Science Fund FWF
ID : DOC 33
Pays : Austria
Organisme : Austrian Science Fund FWF
ID : I 4685
Pays : Austria
Informations de copyright
Copyright © 2022 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology.
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