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Region Hovedstaden - en del af Københavns Universitetshospital
Udgivet

Increased Intrathecal Activity of Follicular Helper T Cells in Patients With Relapsing-Remitting Multiple Sclerosis

Publikation: Bidrag til tidsskriftTidsskriftartikelpeer review

  1. Peripheral helper T cells in the pathogenesis of multiple sclerosis

    Publikation: Bidrag til tidsskriftTidsskriftartikelpeer review

  2. Time to first treatment and risk of disability pension in relapsing-remitting multiple sclerosis

    Publikation: Bidrag til tidsskriftTidsskriftartikelpeer review

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BACKGROUND AND OBJECTIVES: Follicular helper T (Tfh) cells play a critical role in protective immunity helping B cells produce antibodies against foreign pathogens and are likely implicated in the pathogenesis of various autoimmune diseases. The purpose of this study was to investigate the role of Tfh cells in the pathogenesis of multiple sclerosis (MS).

METHODS: Using flow cytometry, we investigated phenotype, prevalence, and function of Tfh cells in blood and CSF from controls and patients with relapsing-remitting MS (RRMS) and primary progressive MS (PPMS). In addition, an in vitro blood-brain barrier coculture assay of primary human astrocytes and brain microvascular endothelial cells grown in a Boyden chamber was used to assess the migratory capacity of peripheral Tfh cells.

RESULTS: This study identified 2 phenotypically and functionally distinct Tfh cell populations: CD25- Tfh cells (Tfh1-like) and CD25int Tfh cells (Tfh17-like). Whereas minor differences in Tfh cell populations were found in blood between patients with MS and controls, we observed an increased frequency of CD25- Tfh cells in CSF of patients with RRMS and PPMS and CD25int Tfh cells in patients with RRMS, compared with controls. Increasing frequencies of CSF CD25- Tfh cells and the CD25- Tfh/Tfr ratio scaled with increasing IgG index in patients with RRMS. Despite an increased prevalence of intrathecal Tfh cells in patients with MS, no difference in the migratory capacity of circulating Tfh cells was observed between controls and patients with MS. Instead, CSF concentrations of CXCL13 scaled with total counts of Tfh and Tfr cell subsets in the CSF.

DISCUSSION: Our study indicates substantial changes in intrathecal Tfh dynamics, particularly in patients with RRMS, and suggests that the intrathecal inflammatory environment in patients with RRMS promotes recruitment of peripheral Tfh cells rather than the Tfh cells having an increased capacity to migrate to CNS.

OriginalsprogEngelsk
TidsskriftNeurology: Neuroimmunology and NeuroInflammation
Vol/bind9
Udgave nummer5
ISSN2332-7812
DOI
StatusUdgivet - sep. 2022

Bibliografisk note

Copyright © 2022 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology.

ID: 79469732