Chest
Clinical InvestigationsAction of Budesonide on Asthmatic Bronchial Hyperresponsiveness: Effects on Directly and Indirectly Acting Bronchoconstrictors
Section snippets
Subjects
Ten atopic subjects with mild asthma requiring only irregular therapy with inhaled β2 agonists (Table 1) took part in this study which had the permission of the Royal Postgraduate Medical School and Hammersmith Special Health Authority Ethics Committee.
Challenges
Histamine challenge: Baseline lung function was taken as the mean of six consecutive measurements of (SGaw) measured using a computer-assisted body Plethysmograph.12 The subjects then inhaled five breaths of 0.9 percent saline solution from a
Lung Function
There were no differences between the baseline FEV1 and SGaw on all the study days, the mean ± SE FEV1 being 3.16 ±0.14 L before and 3.14 ±0.24 L after placebo and 3.34 ± 0.14 L before and 3.41 ± 0.15 L after budesonide. The mean ± SE SGaw was 0.77 ± 0.11 kPa–1•s–1 before and 0.76±0.12 kPa–1•s–1 after placebo and 0.91 ± 0.12 kPa–1•s–1 before and 0.87±0.1 kPa–1•s–1 after budesonide (Table 2).
Challenge
Analysis of the four histamine and bradykinin challenges show no difference between the two pre-drug
DISCUSSION
Inhaled budesonide (1.2 mg/24 h) for three weeks reduced the BHR to both the direct stimulus histamine and the indirect stimulus bradykinin to the same degree (1.95 and 2.1 doubling doses, respectively). In this group of patients with mild asthma, budesonide had little effect on symptoms or clinic lung function, although there was a small but significant increase in daily PEF.
The magnitude of decrease in BHR to histamine is consistent with that previously reported.2, 3, 4, 5, 6 We are unaware
ACKNOWLEDGMENTS
The writers thank the Medical Research Council and the Chest, Heart and Stroke Association for their support of this work.
REFERENCES (26)
- et al.
Effects of beclomethasone dipropionate on bronchial responsiveness to histamine in controlled nonstroid-dependent asthma.
J Allergy Clin Immunol
(1985) - et al.
Changes in bronchial hyperreactivity induced by 4 weeks of treatment with antiasthmatic drugs in patients with allergic asthma: a comparison between budesonide and terbutaline.
J Allergy Clin Immunol
(1985) - et al.
Effect of long-term treatment with inhaled corticosteroids and beta-agonists on bronchial responsiveness in children with asthma.
J Allergy Clin Immunol
(1987) - et al.
An evaluation of pharmacotherapy for exercise-induced asthma.
J Allergy Clin Immunol
(1979) - et al.
Bradykinin and human airways.
Respir Physiol
(1975) - et al.
Bronchoconstriction by histamine and bradykinin in guinea-pigs: relationship to thromboxane A2 generation and the effect of aspirin.
Prostaglandins
(1980) - et al.
Dosage and time effects of inhaled budesonide on bronchial hyperreactivity.
Am Rev Respir Dis
(1988) - et al.
Effect of long-term treatment with an inhaled corticosteroid (budesonide) on airway hyperresponsiveness and clinical asthma in nonsteroid-dependent asthmatics.
Am Rev Respir Dis
(1990) - et al.
Effect of inhaled budesonide on bronchial reactivity in asthma.
Thorax
(1989) - et al.
Dose related effects of salbutamol and ipratropium bromide on airway calibre and reactivity in subjects with asthma.
Thorax
(1988)
The effect of intravenous sodium cromoglycate on the bronchoconstriction induced by sulphur dioxide inhalation in man.
Clin Sci
Bradykinin-induced bronchoconstriction in humans.
Am Rev Respir Dis
Adenosine-induced bronchoconstriction in asthma.
Am Rev Respir Dis
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2018, Immunology and Allergy Clinics of North AmericaCitation Excerpt :The exact mechanism of action of AMP on airway wall is not well-defined, but the role of mast cells is crucial based on a variety of inflammatory mediators, such as histamine, prostaglandins, leukotrienes, and IL-8 release, from human mast cells enhanced by adenosine in vitro.156–159 Although there are studies that have shown differential BHR response to antiinflammatories such as ICSs, there are also those that show concordant effects of these medications on bronchial responsiveness to direct and indirect stimuli.143,160–163 Perhaps the variability in bronchial response to direct and indirect stimuli from ICS therapy depends not only on the specific drug or stimulant but also on the duration of treatment, dosage, and delivery (see Table 1).
Bronchoprovocation Testing in Asthma
2012, Immunology and Allergy Clinics of North AmericaCitation Excerpt :The exact effects of AMP on airway wall are not well-defined, but the role of mast cells is crucial based on a variety of inflammatory mediators such as histamine, prostaglandins, leukotrienes, and IL-8 release from human mast cells enhanced by adenosine in vitro.117–120 Although there are studies that have shown differential BHR response to anti-inflammatories such as inhaled corticosteroids, there are also those that show concordant effects of these medications on bronchial responsiveness to direct and indirect stimuli.104,121–124 Although most of the indirect stimuli that invoke an inflammatory response share a common pathway in the kinetics, the extent to which the initial insult affects the influx of inflammatory cells and release of mediators is what the differential responses between challenges.
Bronchoprovocation Testing in Asthma
2007, Immunology and Allergy Clinics of North AmericaCitation Excerpt :The exact effects of AMP on airway wall are not well-defined, but the role of mast cells is crucial based on a variety of inflammatory mediators such as histamine, prostaglandins, leukotrienes, and IL-8 release from human mast cells enhanced by adenosine in vitro [89–92]. Although there are studies that have shown differential BHR response to anti-inflammatories such as inhaled corticosteroids, there are also those that show concordant effects of these medications on bronchial responsiveness to direct and indirect stimuli [93–97]. Although most of the indirect stimuli that invoke an inflammatory response share a common pathway in the kinetics or the extent to which the initial insult affects the mobilization and influx of inflammatory cells and release of mediators creates the differential responses between challenges.
The role of endogenous and exogenous AMP in asthma and chronic obstructive pulmonary disease
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Sensitivity and Validity of Three Bronchial Provocation Tests to Demonstrate the Effect of Inhaled Corticosteroids in Asthma
2003, ChestCitation Excerpt :The length of the study was considered important given the chronic nature of asthma. To our knowledge, our study is the longest comparison of bronchial provocation tests during treatment with ICS.567891011121314 The present study can also be criticized due to the lack of objective measurement of drug compliance; however, we asked the compliance during every visit and always encouraged the patients to take their medication regularly.
Manuscript received November 5; revision accepted January 22.