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Defective CD19+CD24CD38 transitional B-cell function in patients with relapsing-remitting MS. | LitMetric

AI Article Synopsis

  • Multiple sclerosis (MS) involves dysfunction in immune regulation, particularly with T and B cells, leading to increased inflammation.
  • This study explores whether regulatory B cells (specifically CD19+CD24CD38 transitional B cells) are impaired in patients with relapsing-remitting MS (RRMS) compared to healthy individuals.
  • Findings show that while healthy subjects' transitional B cells produce significant levels of IL-10 and can suppress harmful T-cell activity, RRMS patients have transitional B cells that produce much less IL-10 and fail to regulate T-cell function effectively.

Article Abstract

Background: Multiple sclerosis (MS) is characterized by central nervous system (CNS) infiltration of T and B cells, excess inflammatory cytokine and chemokine production and failure of immune regulation. CD19+CD24CD38 transitional B cells producing interleukin (IL)-10 have been shown to suppress interferon-γ (IFNγ) and tumour necrosis factor-α (TNFα) production by CD4+ T cells and to be dysfunctional in autoimmune arthritis and systemic lupus erythematosus.

Objective: We hypothesized that transitional B-cell-dependent immune regulation could be defective in MS and examined their function in healthy subjects and patients with relapsing-remitting multiple sclerosis (RRMS).

Methods: A total of 62 healthy donors and 21 RRMS subjects donated peripheral blood for the study. IL-10-producing B cells, IFNγ and TNFα-producing T cells and proliferating T cells were quantified by flow cytometry.

Results: In healthy individuals, CD19+CD24CD38 transitional B cells produce more IL-10 than CD19+CD24+CD38+ naive and CD19+CD24CD38- memory B cells and are able to suppress CD4+ T-cell proliferation and IFNγ and TNFα-production. In subjects with RRMS, CD19+CD24CD38 transitional B cells produce significantly less IL-10 and to fail to suppress effector T-cell function.

Conclusion: CD19+CD24CD38 transitional B cells physiologically represent the most potent regulatory B-cell subset and are functionally defective in patients with RRMS, an abnormality that may contribute to the immune pathological process.

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Source
http://dx.doi.org/10.1177/1352458520951536DOI Listing

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