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  • Title: Elevated CD40 ligand expressing blood T-cell levels in multiple sclerosis are reversed by interferon-beta treatment.
    Author: Teleshova N, Bao W, Kivisäkk P, Ozenci V, Mustafa M, Link H.
    Journal: Scand J Immunol; 2000 Mar; 51(3):312-20. PubMed ID: 10736102.
    Abstract:
    Myelin protein reactive CD4+ T cells are considered to be involved in the proposed immunopathogenesis of multiple sclerosis (MS). One particularly important molecule for T-cell activation is the CD40L (gp39) that is expressed on the surface of T cells. This study focuses on the CD40 and the CD40L expression on mononuclear cells prepared from blood from patients with MS, other neurological diseases (OND) and healthy subjects. Immunostaining followed by a three channel flow cytometry was adopted. Patients with MS had higher levels of CD3+CD40L+, CD4+CD40L+ and CD8+CD40L+ T cells compared to patients with OND and healthy subjects. Cross-sectional comparisons revealed that the elevation of CD40L+ T cell subtypes was confined to the patients with untreated MS and not observed in the patients with MS treated with interferon-beta (IFN-beta). Follow up studies showed that levels of CD3+CD40L+ and CD4+CD40L+ T cells decreased in individual patients after the initiation of the IFN-beta treatment. The enhanced expression of CD40L on CD3+, CD4+ and CD8+ T cells in patients with MS may implicate a role for this molecule in disease immunopathogenesis.
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