Long-term low-dose erythromycin in patients with unexplained chronic cough: a double-blind placebo controlled trial

被引:45
作者
Yousaf, Nadia [1 ]
Monteiro, William [1 ]
Parker, Debbie [1 ]
Matos, Sergio [2 ]
Birring, Surinder [3 ]
Pavord, Ian D. [1 ]
机构
[1] Univ Hosp Leicester NHS Trust, Glenfield Hosp, Inst Lung Hlth, Leicester LE3 9QP, Leics, England
[2] Univ Aveiro, Inst Elect & Telemat Engn IEETA, P-3800 Aveiro, Portugal
[3] Kings Coll Hosp London, London, England
关键词
IDIOPATHIC CHRONIC COUGH; INDUCED SPUTUM; MANAGEMENT; THERAPY; DISEASE; SENSITIVITY; IL-8;
D O I
10.1136/thx.2010.142711
中图分类号
R56 [呼吸系及胸部疾病];
学科分类号
摘要
Aims Unexplained chronic cough is a common condition with no satisfactory treatments. Previous work has suggested that cough may be linked to neutrophilic airway inflammation. This study tested the hypothesis that long-term low-dose erythromycin reduces the induced sputum neutrophil count and 24 h cough frequency in patients with unexplained chronic cough. Methods 30 patients with an unexplained chronic cough lasting more than 8 weeks were randomly assigned to take 250 mg erythromycin once daily (n=15) or placebo (n=15) for 12 weeks in a double-blind parallel group study. Cough frequency, cough reflex sensitivity and cough severity were assessed at baseline, 6, 12 and 24 weeks. The primary outcome measure was change in 24 h cough frequency at 12 weeks. Results There was no difference in the change in cough frequency between the erythromycin and placebo groups at 12 weeks (mean difference in fold change 1.1; 95% CI 0.7 to 1.5; p=0.585) or at other times. There was a statistically significant between-treatment difference in the change in sputum neutrophils at 12 weeks (-10.2% vs +6.6% with erythromycin and placebo; mean difference 16.8%; 95% CI 1.6 to 32.1; p=0.03) but not at other times. There was no difference in the change in other measures of cough between treatments. Conclusions Treatment with low-dose erythromycin for 12 weeks reduces the induced sputum neutrophil count but not cough frequency or severity in patients with unexplained chronic cough.
引用
收藏
页码:1107 / 1110
页数:4
相关论文
共 25 条
[1]   The Leicester Cough Monitor: preliminary validation of an automated cough detection system in chronic cough [J].
Birring, S. S. ;
Fleming, T. ;
Matos, S. ;
Raj, A. A. ;
Evans, D. H. ;
Pavord, I. D. .
EUROPEAN RESPIRATORY JOURNAL, 2008, 31 (05) :1013-1018
[2]   Idiopathic chronic cough and organ-specific autoimmune diseases: a case-control study [J].
Birring, SS ;
Murphy, AC ;
Scullion, JE ;
Brightling, CE ;
Browning, M ;
Pavord, ID .
RESPIRATORY MEDICINE, 2004, 98 (03) :242-246
[3]   Induced sputum inflammatory mediator concentrations in chronic cough [J].
Birring, SS ;
Parker, D ;
Brightling, CE ;
Bradding, P ;
Wardlaw, AJ ;
Pavord, ID .
AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE, 2004, 169 (01) :15-19
[4]   Idiopathic chronic cough: association with organ specific autoimmune disease and bronchoalveolar lymphocytosis [J].
Birring, SS ;
Brightling, CE ;
Symon, FA ;
Barlow, SG ;
Wardlaw, AJ ;
Pavord, ID .
THORAX, 2003, 58 (12) :1066-1070
[5]  
FIELD A, 2005, DISCOVERING STAT USI, pCH9
[6]   Impact of chronic cough on quality of life [J].
French, CL ;
Irwin, RS ;
Curley, FJ ;
Krikorian, CJ .
ARCHIVES OF INTERNAL MEDICINE, 1998, 158 (15) :1657-1661
[7]   Chronic idiopathic cough - A discrete clinical entity? [J].
Haque, RA ;
Usmani, OS ;
Barnes, PJ .
CHEST, 2005, 127 (05) :1710-1713
[8]  
HOWARD P, 1977, BRIT J DIS CHEST, V71, P19, DOI 10.1016/S0007-0971(77)80056-9
[9]   Azithromycin therapy for neutrophilic airways disease: myth or magic? [J].
Idris, Saad F. ;
Chilvers, Edwin R. ;
Haworth, Charles ;
McKeon, Damian ;
Condliffe, Alison M. .
THORAX, 2009, 64 (03) :186-189
[10]   Increased neutrophils and cytokines, TNF-α and IL-8, in induced sputum of non-asthmatic patients with chronic dry cough [J].
Jatakanon, A ;
Lalloo, UG ;
Lim, S ;
Chung, KF ;
Barnes, PJ .
THORAX, 1999, 54 (03) :234-237