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Preserved antigen-specific immune response in patients with multiple sclerosis responding to IFNβ-therapy
Matthias Mehling1, Stefanie Fritz, Patricia Hafner
1Immunobiology Laboratory, Department of Biomedicine and Medical Outpatient Department, University Hospital Basel, Basel, Switzerland ; Department of Neurology and Clinical Neuroimmunology Laboratory/Department of Biomedicine, University Hospital Basel, Basel, Switzerland.
Background:
Interferon-beta (IFNβ) regulates the expression of a complex set of pro- as well as anti-inflammatory genes. In cohorts of MS patients unstratified for therapeutic response to IFNβ, normal vaccine-specific immune responses have been observed. Data capturing antigen-specific immune responses in cohorts of subjects defined by response to IFNβ-therapy are not available.
Objective:
To assess antigen-specific immune responses in a cohort of MS patients responding clinically and radiologically to IFNβ.
Methods:
In 26 MS patients, clinical and MRI disease activity were assessed before and under treatment with IFNβ. Humoral and cellular immune response to influenza vaccine was prospectively characterized in these individuals, and 33 healthy controls by influenza-specific Enzyme-Linked Immunosorbent Assay (ELISA) and Enzyme Linked Immuno Spot Technique (ELISPOT).
Results:
Related to pre-treatment disease activity, IFNβ reduced clinical and radiological MS disease-activity. Following influenza vaccination, frequencies of influenza-specific T cells and concentrations of anti-influenza A and B IgM and IgG increased comparably in MS-patients and in healthy controls.
Conclusions:
By showing in a cohort of MS-patients responding to IFNβ vaccine-specific immune responses comparable to controls, this study indicates that antigen-specific immune responses can be preserved under successful IFNβ-therapy.
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