Establishment and evaluation of animal model with bronchial asthma in rats

Objective To explore a new method to establish animal model with bronchial asthma in rats.Methods Twenty SD rats(SPF) were randomly divided into asthma group and control group,with 10 rats in each group.The rats in asthma group were sensitized by low-dose ovalbumin(OVA 1mg) to establish rat asthma models,however,the rats in control group were sensitized by aluminium hydroxide gel and were provoked by 0.9% sodium chloride solution.The pathological changes of lung tissue,the cell dividing in bronchoalveolar lavage fluid(BALF) and the levels of OVA-specific IgE in serum were detected and observed for both groups.Results The results of pathological examination showed that airway inflammation was severe in asthma group,and the ratios of neutrophil,lymphocyte and eosinophil in BALF in asthma group were significantly increased,as compared with those in control group(P0.05),furthermore,the serum levels of OVA-specific IgE in asthma group was significantlt higher than that in control group(P0.05).Conclusion The bronchial asthma models in SD rats are successfully established by the method in this investigation.