Abstract:
OBJECTIVE:To assess whether tumor necrosis factor (TNF) antagonism can attenuate eosinophilic airway inflammation in patients with mild-to-moderate allergic asthma. DESIGN:Randomized, double-blind, placebo-controlled trial. SETTING:National Institutes of Health (NIH) Clinical Center. PATIENTS:Twenty-six patients with mild-to-moderate allergic asthma, receiving only inhaled beta-2-agonists, who demonstrated both an early and late phase response to inhalational allergen challenge. INTERVENTION:Injection of a soluble TNF receptor (TNFR:Fc, etanercept, Enbrel) or placebo, 25mg subcutaneously, twice weekly for 2 weeks, followed by a bronchoscopic segmental allergen challenge. MEASUREMENTS:The primary outcome measure was whether TNFR:Fc can access the lung and inhibit TNF bioactivity. Secondary outcome measures included pulmonary eosinophilia, Th2-type cytokines, and airway hyperresponsiveness. RESULTS:Anti-TNF therapy was associated with transient hemiplegia in one patient, which resulted in suspension of the study. Data from the 21 participants who completed the study were analyzed. Following treatment, patients receiving anti-TNF therapy had significantly increased TNFR2 levels in epithelial lining fluid (ELF) (P<0.001), consistent with delivery of TNFR:Fc to the lung. TNF antagonism did not attenuate pulmonary eosinophilia and was associated with an increase in ELF IL-4 levels (P=0.033) at 24h following segmental allergen challenge. TNF antagonism was not associated with a change in airway hyperresponsiveness to methacholine. CONCLUSIONS:TNF antagonism may not be effective for preventing allergen-mediated eosinophilic airway inflammation in mild-to-moderate asthmatics. Transient hemiplegia, which may mimic an evolving stroke, may be a potential toxicity of anti-TNF therapy.
journal_name
Respir Medjournal_title
Respiratory medicineauthors
Rouhani FN,Meitin CA,Kaler M,Miskinis-Hilligoss D,Stylianou M,Levine SJdoi
10.1016/j.rmed.2005.02.031subject
Has Abstractpub_date
2005-09-01 00:00:00pages
1175-82issue
9eissn
0954-6111issn
1532-3064pii
S0954-6111(05)00066-1journal_volume
99pub_type
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