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  • Title: Effects of interferon-beta therapy on innate and adaptive immune responses to the human endogenous retroviruses HERV-H and HERV-W, cytokine production, and the lectin complement activation pathway in multiple sclerosis.
    Author: Petersen T, Møller-Larsen A, Thiel S, Brudek T, Hansen TK, Christensen T.
    Journal: J Neuroimmunol; 2009 Oct 30; 215(1-2):108-16. PubMed ID: 19766328.
    Abstract:
    The effects of treatment of multiple sclerosis patients with IFN-beta on elements in the innate and adaptive immune response were analysed in a longitudinal study. We demonstrate significant decreases in anti-Envelope antibody reactivity for the two closely related Gammaretroviral human endogenous retroviruses (HERVs), HERV-H and HERV-W, as a consequence of IFN-beta therapy, closely linked to efficacy of therapy/low disease activity. We also show strong indications of a protective effect of high levels of two components in the innate pathogen-associated molecular pattern recognition: mannan-binding lectin (MBL), and MBL-associated serine protease 3 (MASP-3). Serum levels of typical Th1- and Th2-related, MS-relevant cytokines were also monitored. Overall both Th1- and Th2-associated cytokines were modestly, albeit significantly up-regulated, notably IL-2 and TNF-alpha (MS patients with inactive disease), as well as IL-4 and, to some extent IL-10 (no increase in IL-10 for MS patients with active disease (non-responders)). We found no overall changes in Th1/Th2 ratios. Our results support that HERV-H/HERV-W and the antiviral immune response may play a role in MS development, and that these HERVs have potential as biomarkers for disease activity.
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