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Clin Transl Immunology. 2014 Dec 19;3(12):e29. doi: 10.1038/cti.2014.28. eCollection 2014 Dec.

Preclinical screening for acute toxicity of therapeutic monoclonal antibodies in a hu-SCID model.

Clinical & translational immunology

Jamie L Brady, Leonard C Harrison, David J Goodman, Peter J Cowan, Wayne J Hawthorne, Philip J O'Connell, Robyn M Sutherland, Andrew M Lew

Affiliations

  1. Walter and Eliza Hall Institute of Medical Research , Parkville, Victoria, Australia ; Department of Medical Biology, The University of Melbourne , Parkville, Victoria, Australia.
  2. Department of Nephrology, St Vincent's Hospital , Fitzroy, Victoria, Australia.
  3. Immunology Research Centre, St Vincent's Hospital , Fitzroy, Victoria, Australia ; Department of Medicine, The University of Melbourne , Parkville, Victoria, Australia.
  4. Centre for Transplant and Renal Research, Westmead Millennium Institute, University of Sydney at Westmead Hospital , Westmead, New South Wales, Australia.

PMID: 25587392 PMCID: PMC4282178 DOI: 10.1038/cti.2014.28

Abstract

Monoclonal antibodies (mAbs) have been a spectacular clinical and commercial success in the treatment of cancer and autoimmune diseases. Many of these mAbs (for example, OKT3, Campath-1H, rituximab and infliximab) are against surface or secreted products of lymphocytes. However, mAbs can have a variety of adverse effects including fever, chills and nausea. This is probably a result of cytokine release, which is most seriously manifested as a 'cytokine storm' as highlighted by the TGN1412 (anti-CD28) trial. Prediction of adverse effects of mAbs would be clinically advantageous and numerous in vitro assays attempting to predict adverse effects have been reported. Here, we report an in vivo humanized mouse model to detect adverse effects in response to OKT3, Campath-1H or the polyclonal Ab preparation anti-thymocyte globulin. We found that the administration of each of these Abs to humanized mice led to acute clinical symptoms such as piloerection, hypomotility and hypothermia, particularly when delivered via the intravenous route. A cytokine storm occurred in the humanized mice receiving OKT3. This model system is a potentially useful tool to predict adverse effects and select initial doses for first-in-human trials. We would advocate this in vivo model, in addition to current in vitro preclinical testing, as a more representative and robust means of assessing potential adverse effects of mAb before their human use.

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