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Molecular Medicine

, Volume 17, Issue 9–10, pp 1039–1044 | Cite as

Monoclonal Anti-HMGB1 (High Mobility Group Box Chromosomal Protein 1) Antibody Protection in Two Experimental Arthritis Models

  • Hanna Schierbeck
  • Peter Lundbäck
  • Karin Palmblad
  • Lena Klevenvall
  • Helena Erlandsson-Harris
  • Ulf Andersson
  • Lars Ottosson
Research Article

Abstract

High mobility group box chromosomal protein 1 (HMGB1) is a DNA-binding nuclear protein that can be released from dying cells and activated myeloid cells. Extracellularly, HMGB1 promotes inflammation. Experimental studies demonstrate HMGB1 to be a pathogenic factor in many inflammatory conditions including arthritis. HMGB1-blocking therapies in arthritis models alleviate disease and confer significant protection against cartilage and bone destruction. So far, the most successful HMGB1-targeted therapies have been demonstrated with HMGB1-specific polyclonal antibodies and with recombinant A box protein, a fragment of HMGB1. The present study is the first to evaluate the potential of a monoclonal anti-HMGB1 antibody (2G7, mouse IgG2b) to ameliorate arthritis. Effects of repeated injections of this antibody have now been studied in two conceptually different models of arthritis: collagen type II-induced arthritis (CIA) in DBA/1 mice and in a spontaneous arthritis disease in mice with combined deficiencies for genes encoding for the enzyme DNase type II and interferon type I receptors. These mice are unable to degrade phagocytozed DNA in macrophages and develop chronic, destructive polyarthritis. Therapeutic intervention in CIA and prophylactic administration of anti-HMGB1 monoclonal antibody (mAb) in the spontaneous arthritis model significantly ameliorated the clinical courses. Anti-HMGB1 mAb therapy also partially prevented joint destruction, as demonstrated by histological examination. The beneficial antiarthritic effects by the anti-HMGB1 mAb in two diverse models of arthritis represent additional proof-of-concept, indicating that HMGB1 may be a valid target molecule to consider for development of future clinical therapy.

Notes

Acknowledgments

This study was financially supported through the regional agreement on medical training and clinical research between the Stockholm County Council and Karolinska Institutet, the Swedish Medical Research Council, the Swedish Association against Rheumatism, Åke Wiberg’s Foundation, the Freemason Lodge Barnhuset in Stockholm, Kronprinsessan Lovisas Stiftelse and King Gustaf V’s Foundation.

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Copyright information

© The Feinstein Institute for Medical Research 2011
www.feinsteininstitute.org

Authors and Affiliations

  • Hanna Schierbeck
    • 1
  • Peter Lundbäck
    • 2
  • Karin Palmblad
    • 1
  • Lena Klevenvall
    • 1
  • Helena Erlandsson-Harris
    • 2
  • Ulf Andersson
    • 1
  • Lars Ottosson
    • 1
  1. 1.Department of Women’s and Children’s Health, Karolinska InstitutetKarolinska University HospitalStockholmSweden
  2. 2.Department of Medicine, Pediatric Rheumatology Research Unit, Karolinska InstitutetKarolinska University HospitalStockholmSweden

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