OBJECTIVE: To investigate bronchial responsiveness to acetylcholine in allergic airway inflammation of SD rats. METHODS: SD rats were immunized and challenged by chicken ovalbumin (OVA). Airway responsiveness, acetylc...OBJECTIVE: To investigate bronchial responsiveness to acetylcholine in allergic airway inflammation of SD rats. METHODS: SD rats were immunized and challenged by chicken ovalbumin (OVA). Airway responsiveness, acetylcholine (Ach) provocation concentration needed to increase baseline airway resistance by 200% (PC(200)) were measured. RESULTS: The value of baseline airway resistance in asthma group was significantly higher than that in control group (2.282 +/- 0.128 vs 3.193 +/- 0.239; P展开更多
文摘OBJECTIVE: To investigate bronchial responsiveness to acetylcholine in allergic airway inflammation of SD rats. METHODS: SD rats were immunized and challenged by chicken ovalbumin (OVA). Airway responsiveness, acetylcholine (Ach) provocation concentration needed to increase baseline airway resistance by 200% (PC(200)) were measured. RESULTS: The value of baseline airway resistance in asthma group was significantly higher than that in control group (2.282 +/- 0.128 vs 3.193 +/- 0.239; P