Abstract:
BACKGROUND:Although airway hyperresponsiveness (AHR) is a characteristic feature of asthma, it is also frequently present in allergic rhinitis (AR). However, the pathogenesis of AHR is unclear and the roles of cytokines in the airway have not been well established in AR. We sought to compare cytokine mRNA levels in the sputum of AR patients with or without AHR and those of asthma patients, and to evaluate whether differences in cytokine levels are associated with the development of an abnormal airway response and the absence of respiratory symptoms in AR patients with AHR. METHODS:Airway cells were obtained by sputum induction from 18 AR patients with AHR, 58 AR patients without AHR, and 27 asthma patients. Airway cell cytokine levels, interleukin (IL) -4, IL-5, IL-13, vascular endothelial growth factor (VEGF), and interferon-gamma (IFN-gamma), were studied at the mRNA level by RT-PCR. RESULTS:Vascular endothelial growth factor and IL-5 mRNA levels were significantly higher in AR patients with AHR than in AR patients without AHR, but these were lower than those of asthmatic patients. Eosinophils were significantly higher in AR patients with AHR and in asthmatic patients than in AR patients without AHR. Interleukin-4, IL-13, and IFN-gamma levels were not elevated in AR patients with or without AHR vs asthma patients. CONCLUSIONS:These findings suggest that VEGF and IL-5 can be important determinants of the development of AHR in AR patients and that lower levels of other cytokines may be associated with the absence of asthmatic symptoms in AR patients with AHR.
journal_name
Allergyjournal_title
Allergyauthors
Sohn SW,Lee HS,Park HW,Chang YS,Kim YK,Cho SH,Kim YY,Min KUdoi
10.1111/j.1398-9995.2007.01550.xsubject
Has Abstractpub_date
2008-03-01 00:00:00pages
268-73issue
3eissn
0105-4538issn
1398-9995pii
ALL1550journal_volume
63pub_type
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