title: Effects of dehydroepiandrosterone on Th2 cytokine production in peripheral blood mononuclear cells from asthmatics.
abstract: OBJECTIVE
  The androgen dehydroepiandrosterone (DHEA) attenuates allergic inflammatory airway reactions by down-regulating the Th2 response in mice. The purpose of this study was to investigate whether DHEA suppresses Th2 cytokine production in cultured peripheral blood mononuclear cells (PBMCs) from asthmatic patients.
  
  
  METHODS
  Sixty-one consecutive suspected asthmatic or non-asthmatic men underwent tests for asthma. PBMCs from each subject were cultured with and without DHEA (0.01~10 microM) for 48 h. The concentrations of interferon (IFN)-gamma, interleukin (IL)-5, and IL-10 in the culture supernatant were measured via an enzyme-linked immunosorbent assay.
  
  
  RESULTS
  In PBMCs from subjects exhibiting methacholine airway hyperresponsiveness (AHR), DHEA significantly suppressed IL-10, IL-5, and IFN-gamma production in a dose-dependent manner (all p<0.001) and tended to increase the IFN-gamma/IL-5 ratio (p=0.087). DHEA (10 microM) suppressed cytokine production to a greater degree in subjects with AHR compared with those without AHR (IL-5: 24.0+/-7.8% vs. 40.9+/-3.6%, p<0.01; IFN-gamma: 29.7+/-7.0% vs. 54.5+/-5.1%, p<0.01). Cytokine suppression was significantly related to AHR, serum total IgE levels, and skin reactivity to house dust mites.
  
  
  CONCLUSIONS
  DHEA suppressed both Th1 and Th2 responses, with a Th1 bias, and the degree of suppression was associated with the severity of AHR or atopy. Therefore, DHEA may be a useful therapy for asthma.
authors.affiliation: Department of Allergy, Chonnam National University Medical School, Gwangju, Korea. ischoi@chonnam.chonnam.ac.kr
authors.forename: Inseon S
authors.initials: IS
authors.lastname: Choi
authors.forename: Yong
authors.initials: Y
authors.lastname: Cui
authors.forename: Young Ah
authors.initials: YA
authors.lastname: Koh
authors.forename: Hyun Chul
authors.initials: HC
authors.lastname: Lee
authors.forename: Yong Bum
authors.initials: YB
authors.lastname: Cho
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Won
mesh_terms: D000276:Adjuvants, Immunologic / Q000494:pharmacology*; D000293:Adolescent; D000328:Adult; D001249:Asthma / Q000473:pathology*; D018929:Cell Culture Techniques; D016207:Cytokines / Q000378:metabolism*; D003687:Dehydroepiandrosterone / Q000494:pharmacology*; D006801:Humans; D008297:Male; D018418:Th2 Cells / Q000187:drug effects* / Q000378:metabolism*; D055815:Young Adult
chemical_list: D000276:Adjuvants, Immunologic; D016207:Cytokines; D003687:Dehydroepiandrosterone