Inhibition of antigen-induced bronchoconstriction by methylprednisolone succinate

J. C. Delehunt, L. Yerger, T. Ahmed, W. M. Abraham

Research output: Contribution to journalArticle

11 Scopus citations


We investigated whether the glucocorticoid methylprednisolone succinate (15 mg/kg) could prevent antigen-induced bronchoconstriction in conscious sheep. Ten allergic ewes were subjected to inhalation challenge with Ascaris suum antigen, with and without methylprednisolone pretreatment, administered intravenously either 20 min or 3 hr before antigen challenge. Antigen challenge alone resulted in increased airflow resistance, pulmonary hyperinflation, and decreases in dynamic lung compliance and arterial oxygen tension. Methylprednisolone administered 20 min before antigen challenge had no effect on these antigen-induced changes. In contrast, administration of methylprednisolone 3 hr before antigen challenge effectively prevented all the responses to antigen challenge. We suggest that pretreatment with glucocorticoids can attenuate airway anaphylaxis if sufficient time is allowed between the pretreatment and the antigen challenge.

Original languageEnglish (US)
Pages (from-to)479-483
Number of pages5
JournalThe Journal of Allergy and Clinical Immunology
Issue number4
StatePublished - Apr 1984


ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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