Journal of Jilin University Medicine Edition ›› 2016, Vol. 42 ›› Issue (02): 321-325.doi: 10.13481/j.1671-587x.20160225

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Determination of inflammatory factorlevels and inflammatory cell percentages in cough variant asthma patients unresponsive to bronchodilator treatment and their significances

HU Bo1, TENG Fei1, WANG Hongyan2, ZHANG Lu1, YUAN Hongyan3   

  1. 1. Department of Respiratory Medicine, Affiliated Hospital, Beihua University, Jilin 132001, China;
    2. Department of Neurology, Affiliated Hospital, Beihua University, Jilin 132001, China;
    3. Department of Pharmacology, Affiliated Hospital, Beihua University, Jilin 132001, China
  • Received:2015-09-17 Published:2016-03-31

Abstract:

Objective: To determine the inflammatory factor levels and inflammatory cell percentages in the patients with cough variant asthma (CVA), and to clarify their potential role in the pathogenesis of CVA unresponsive to bronchodilator treatment.Methods: 60 patients with CVA were randomly selected and divided into CVA unresponsive to bronchodilator treatment group (n=30) and CVA responsive to bronchodilator treatment group (n=30).As the same time 30 cases of healthy persons were used as normal control group.The levels of interluekin-8(IL-8) and esoinophil cationic protein (ECP) in their induced sputum were detected, the classification of inflammatory cells in their induced sputum were observed, and their scores of cough symptom were recorded.Results: The IL-8 level in the induced sputum of the patients in CVA unresponsive to bronchodilator treatment group was higher than that in CVA responsive to bronchodilator treatment group and normal control group (P<0.05).The ECP level in the induced sputum of the patients in CVA unresponsive to bronchodilator treatment group was lower than that in CVA responsive to bronchodilator treatment group (P<0.05), but it was similar to the level in normal control group (P>0.05).The neutrophil percentages in the induced sputum of the patients in CVA unresponsive to bronchodilator treatment group were higher than those in CVA responsive to bronchodilator treatment group and normal control group (P<0.05).The scores of cough symptom of the patients in CVA unresponsive to bronchodilator treatment group was positively correlated with IL-8 level(r=0.764, P<0.01), and the scores of cough symptom of the patients in CVA unresponsive to bronchodilator treatment group was positively correlated with the neutrophil percentage in induced sputum(r=0.889, P<0.01).Conclusion: IL-8 and neutrophil may be associated with the incidence of CVA unresponsive to bronchodilator treatment.They can aggravate the inflammation and hypersensitivity of airway and cough symptom.The determination of IL-8 and neutrophil can be used as an accessory method in the diagnosis and judgement of severity degree and curative effect of CVA in clinic.

Key words: interleukin-8, neutrophil, cough variant asthma, bronchodilator

CLC Number: 

  • R562.25