BALB/c 생쥐에서 천식 발생에 대한 dehydroepiandrosterone의 억제효과
Suppressive effect of dehydroepiandrosterone on the development of asthmatic readtion in BALB/c mice
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Abstract
Background:Dehydroepiandrosterone (DHEA), an adrenal androgen, may regulate Th1/Th2 cytokines. Objective:To determine whether DHEA have a preventive effect against the development of asthma, a Th2-associated disease. Materials and methods:Female BALB/c mice were fed with a standard diet incorporated with 0.1% (w/w) of DHEA for 1 week before sensitization with ovalbumin (OVA, 20 µg i.p. twice with 2-week intervals). Enhanced pause (Penh) was monitored after 1% OVA inhalations for 3 successive days, and then the methacholine bronchoprovocation tests were performed using a whole-body plethysmography system. Analyses of inflammatory cells, cytokines, and OVA-specific IgE were carried out. Results:Both the excessive airway narrowing (maximum Penh) and the airway hypersensitivity (PC200, mg/mL) to methacholine were significantly suppressed with the DHEA pretreatment (P<.05 and P<.01, respectively). However, the numbers of the inflammatory cells and the levels of interleukin (IL)-4, IL-5, and interferon (IFN)-γ in the bronchoalveolar lavage fluid, the production of IL-4, IL-5, and IFN-γ by Con A-stimulated splenocytes, and the serum IgE level in DHEA group were not significantly different from those in asthma group. Conclusion:DHEA pretreatment could suppress the development of asthmatic airway hyperresponsiveness without suppression of Th2 cytokines and airway inflammation. (J Asthma Allergy Clin Immunol 24: 116-26, 2004)
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