ISSN:
1420-908X
Schlagwort(e):
Airway
;
Allergen
;
Bradykinin
;
Bradykinin receptor
;
HOE140
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Medizin
Notizen:
Abstract We have investigated the role of bradykinin in allergen-induced airway microvascular leakage and bronchoconstriction in sensitized guinea pigs. We used a selective bradykinin B2 receptor antagonist, HOE140, which has been shown to prevent the airway effects induced by bradykinin. Lung resistance (RL) was measured for 6 min after challenge with allergen. Extravasation of Evans blue dye into airway tissues was used as an index of the airway microvascular leakage. Aerosolized ovalbumin (5 mg/ml, 30 breaths) induced a significant increase in RL and leakage of dye in the trachea, main bronchi and intrapulmonary airways in the ovalbumin-sensitized guinea pigs. HOE140 given by inhalation (200 μM, 60 breaths) had no effect on the airway microvascular leakage and bronchoconstriction induced by the allergen. I.v. HOE140 (200 nmol/kg) did not significantly inhibit these airway responses. We conclude that bradykinin-mediated mechanism may not play a significant role in airway microvascular leakage or bronchoconstriction induced by allergen.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF02265164
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