Galle P, Jensen L, Andersson C, Cuzzocrea S, Di Paola R, Nicoletti F, Svenson M, Bendtzen K, Thomsen AR, Hansen MB. Vaccination with IL-6 analogues induces autoantibodies to IL-6 and influences experimentally induced inflammation.
Int Immunopharmacol 2007;
7:1704-13. [PMID:
17996680 DOI:
10.1016/j.intimp.2007.08.026]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2007] [Revised: 08/16/2007] [Accepted: 08/31/2007] [Indexed: 10/22/2022]
Abstract
IL-6 is involved in inflammation and a therapeutic target. 0.1% of Danish blood donors have nanomolar plasma concentrations of polyclonal, picomolar affinity and in vitro as well as in vivo neutralizing IgG autoantibodies to IL-6 (aAb-IL-6). Such donors are assumed to be severely IL-6 deficient; yet they appear healthy and do not exhibit overt clinical or laboratory abnormalities. We induced comparable levels of aAb-IL-6 in different mouse strains by vaccination with immunogenic IL-6 analogues. We observed that the induced aAb-IL-6 protected against collagen-induced arthritis and experimental allergic encephalitis. Furthermore, aAb-IL-6 carrying mice displayed increased plasma TNFalpha concentrations upon challenge with LPS. Taken together, induction of IL-6 autoantibodies was possible in different mouse strains. The autoantibodies influenced experimental inflammation. This immunotherapeutic principle might be a viable alternative in immune competent humans suffering from disorders driven by IL-6.
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