Methylprednisolone restores sensitivity to beta-adrenergic agonists in Basenji-Greyhound dogs
| Autor: | Carol A. Hirshman, Joseph D. Tobias, R A Sauder |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Time Factors
Physiology medicine.drug_class Muscle Relaxation Drug Resistance Methylprednisolone Pulmonary function testing Dogs Physiology (medical) Receptors Adrenergic beta medicine Animals Albuterol Lung Compliance Methacholine Chloride business.industry Airway Resistance Respiratory disease Adrenergic beta-Agonists medicine.disease Aminophylline respiratory tract diseases Anesthesia Salbutamol Corticosteroid Methacholine Bronchoconstriction medicine.symptom business medicine.drug |
| Zdroj: | Journal of Applied Physiology. 72:694-698 |
| ISSN: | 1522-1601 8750-7587 |
| DOI: | 10.1152/jappl.1992.72.2.694 |
| Popis: | This study investigated the effect of chronic methylprednisolone treatment on the ability of albuterol and aminophylline to inhibit methacholine-induced airway constriction in Basenji-Greyhound (BG) dogs in vivo. Pulmonary responsiveness to methacholine was measured in five untreated BG dogs and in the same dogs pretreated with albuterol or aminophylline (which has been shown in this model to release endogenous catecholamines). Each dog was studied before, during, and after daily subcutaneous methylprednisolone for 6 wk. Changes in pulmonary resistance and dynamic compliance with methacholine aerosol challenge were measured. Neither baseline pulmonary function nor pulmonary responsiveness to aerosolized methacholine was significantly altered by albuterol, aminophylline, or chronic methylprednisolone administration alone. However, pretreatment with albuterol or aminophylline significantly attenuated airway responses to methacholine in BG dogs chronically receiving methylprednisolone. Because the reduced sensitivity to albuterol and aminophylline was restored by chronic methylprednisolone treatment, we conclude that at least part of the beneficial effects of corticosteroids on airways in BG dogs is through modulation of beta-adrenergic function. |
| Databáze: | OpenAIRE |
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