Abstract
Objective To observe the expressions of grouth-related oncogen (GRO)α, epithelial neutrophil activating protein-78 (ENA-78) and neutrophil-activating peptide-2 (NAP-2) of rat asthma. And to investigate the role of neutrophil in the pathogenesis of asthma exacerbation. Methods In this experi-ment, the rat model of asthma were randomly divided into two groups on average, including asthma group and control group. Levels of ENA-78 at blood neutrophil were detected by flow cytometry method. The ex-pressions of GROα protein at bronchial wall and NAP-2 protein at blood neutrophil were detected by immuno-histochemieal method. Results Levels of GROα, ENA-78 and NAP-2 proteins in asthma group [0.138 ±0.009(A value), 97.65±13.99(MFI), 0.198±0.016(A value), respectively]were significantly higher than those in control group[0.077±0.010(A value), 50.79±8.66(MFI), 0.079±0.015(A value), re-spectively], all P < 0.01. Conclusion Levels of GROα, ENA-78 and NAP-2 were increased at rat asth-ma. They may be participate in inflammation of asthma exacerbation. Neutrophil may promote inflammatory cells influxing into airway wall via increasing synthesis of CXC chemotactic factors. Key words: Asthma; GROα; ENA-78; NAP-2; Chemotactic factor
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