βIV-Spectrin Autoantibodies in 2 Individuals With Neuropathy of Possible Paraneoplastic Origin: A Case Series.
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:
16
01
2022
accepted:
18
04
2022
entrez:
17
5
2022
pubmed:
18
5
2022
medline:
21
5
2022
Statut:
epublish
Résumé
To identify the autoantigen in 2 individuals with possible seronegative paraneoplastic neuropathy. Serum and CSF were screened by tissue-based assay and panned for candidate autoantibodies by phage display immunoprecipitation sequencing (PhIP-Seq). The candidate antigen was validated by immunostaining knockout tissue and HEK 293T cell-based assay. Case 1 presented with gait instability, distal lower extremity numbness, and paresthesias after a recent diagnosis of serous uterine and fallopian carcinoma. Case 2 had a remote history of breast adenocarcinoma and presented with gait instability, distal lower extremity numbness, and paresthesias that progressed to generalized weakness. CSF and serum from both patients immunostained the axon initial segment (AIS) and node of Ranvier (NoR) of mice and enriched βIV-spectrin by PhIP-Seq. Patient CSF and serum failed to immunostain NoRs in dorsal root sensory neurons from βI/βIV-deficient mice. βIV-spectrin autoantibodies were confirmed by overexpression of AIS and nodal βIV-spectrin isoforms Σ1 and Σ6 by a cell-based assay. βIV-spectrin was not enriched in a combined 4,815 PhIP-Seq screens of healthy and other neurologic disease patients. Therefore, βIV-spectrin autoantibodies may be a marker of paraneoplastic neuropathy. This study provides Class IV evidence that βIV-spectrin antibodies are specific autoantibody biomarkers for paraneoplastic neuropathy.
Identifiants
pubmed: 35581007
pii: 9/4/e1188
doi: 10.1212/NXI.0000000000001188
pmc: PMC9128026
pii:
doi:
Substances chimiques
Autoantibodies
0
Spectrin
12634-43-4
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Howard Hughes Medical Institute
Pays : United States
Organisme : NIH HHS
ID : S10 OD017993
Pays : United States
Organisme : NIMH NIH HHS
ID : R01 MH122471
Pays : United States
Organisme : NIMH NIH HHS
ID : R25 MH060482
Pays : United States
Organisme : NINDS NIH HHS
ID : K08 NS096117
Pays : United States
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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