Anaphylaxis and mortality induced by treatment of mice with anti-VLA-4 antibody and pertussis toxin

Niannian Ji, Nagarjun Rao, Neal M. Guentzel, Bernard P. Arulanandam, Thomas G. Forsthuber

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Ab-mediated blockade of the adhesion molecule VLA-4 has been shown to ameliorate disease in human multiple sclerosis patients and experimental autoimmune encephalomyelitis (EAE) animal models. We wanted to determine whether anti-VLA-4 Ab treatment affected the function and persistence of autoreactive T cells in mice with EAE. Unexpectedly, we observed a high level of mortality in anti-VLA-4 mAb (PS/2)-treated mice with actively induced EAE despite decreased disease severity. Investigation of the underlying mechanism showed that injection of PS/2 mAb in combination with pertussis toxin resulted in anaphylaxis and mortality. Furthermore, the data showed that CD4+ T cells were required for this effect and suggested a role for IL-1β and TNF-α in the underlying pathology. The results reveal a previously not appreciated deleterious effect of anti-VLA-4 Ab treatment in combination with exposure to pertussis toxin.

Original languageEnglish (US)
Pages (from-to)2750-2756
Number of pages7
JournalJournal of Immunology
Volume186
Issue number5
DOIs
StatePublished - Mar 1 2011

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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