Theophylline inhibits late asthmatic reactions induced by toluene diisocyanate in sensitised subjects.

Abstract:

:Toluene diisocyanate (TDI)-induced asthma is a frequent occupational airway disease. To determine whether a calibrated dosage of oral slow-release theophylline inhibits asthmatic reactions and the associated increase of airway responsiveness to methacholine induced by TDI, we examined six asthmatic subjects who developed a late or a dual asthmatic reaction after TDI inhalation challenge. We administered oral slow-release theophylline or placebo to each subject for 7 days according to a double-blind, randomized, cross-over study design. When the subjects received a placebo, TDI caused a late or a dual asthmatic reaction. When the subjects received theophylline. TDI caused significantly reduced late asthmatic reactions. Mean serum theophylline concentrations were within the therapeutic range. Theophylline neither modified the baseline airway responsiveness to methacholine, nor the increase of airway responsiveness to methacholine induced by TDI. These results suggest that slow-release theophylline may improve TDI-induced late asthmatic reactions, but it does not change the baseline airway responsiveness to methacholine and the increase of airway responsiveness to methacholine induced by TDI.

journal_name

Eur J Pharmacol

authors

Crescioli S,De Marzo N,Boschetto P,Spinazzi A,Plebani M,Mapp CE,Fabbri LM,Ciaccia A

doi

10.1016/0926-6917(92)90010-a

keywords:

subject

Has Abstract

pub_date

1992-05-01 00:00:00

pages

45-50

issue

1

eissn

0014-2999

issn

1879-0712

journal_volume

228

pub_type

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