Osler Chest Unit, Churchill Hospital, Oxford, U.K.
Eosinophils, bronchial hyperreactivity and late-phase asthmatic reactions
Article first published online: 27 APR 2006
Clinical & Experimental Allergy
Volume 15, Issue 5, pages 411–418, September 1985
How to Cite
DURHAM, S. R. and KAY, A. B. (1985), Eosinophils, bronchial hyperreactivity and late-phase asthmatic reactions. Clinical & Experimental Allergy, 15: 411–418. doi: 10.1111/j.1365-2222.1985.tb02290.x
- Issue published online: 27 APR 2006
- Article first published online: 27 APR 2006
- (Received in original form 18 February 1985 and in revised form 19 May 1985; accepted for publication 19 May 1981)
We have measured airways reactivity (methacholine PC20) and blood eosinophils in eleven asthmatics with allergen-induced late-phase reactions. Before challenge there was a significant (P<0.05) inverse correlation between blood eosinophils and the methacholine PC20. After allergen inhalation eosinophil counts were significantly (P<0.01) elevated at 24 hr. These increases in blood eosinophil counts were not observed in patients who developed single early responses. The magnitude of the changes in eosinophil counts (24 hr minus pre-challenge values) also correlated with the baseline methacholine PC20 (P<0.01) in the late-phase responders. These observations suggest that there may be a direct association between eosinophils and airway reactivity in subjects who develop late-phase asthmatic reactions.