Bacteriology and Inflammation in Bronchiectasis

Summary

Bronchiectasis is a chronic disease arises from progressive airway inflammation and infection. It has been postulated that bacterial infection triggers intense airway inflammation leading to acute exacerbation of bronchiectasis. Antibiotics have been the most potent medications for the treatment of bronchiectasis, however, the sputum bacterial load and inflammatory indices at steady-state and exacerbation remain largely unknown. The investigation might shed light on the roles that antibiotics play in acute exacerbation of bronchiectasis and uncover the mechanisms on why a subgroup of individuals do not respond satisfactorily.

Timeline

Start

2012-09

Primary completion

2023-12

Completion

2023-12

Publications

• Background Barker AF. Bronchiectasis. N Engl J Med. 2002 May 2;346(18):1383-93. doi: 10.1056/NEJMra012519. No abstract available.
• Background Fuschillo S, De Felice A, Balzano G. Mucosal inflammation in idiopathic bronchiectasis: cellular and molecular mechanisms. Eur Respir J. 2008 Feb;31(2):396-406. doi: 10.1183/09031936.00069007.
• Background Murray MP, Turnbull K, Macquarrie S, Hill AT. Assessing response to treatment of exacerbations of bronchiectasis in adults. Eur Respir J. 2009 Feb;33(2):312-8. doi: 10.1183/09031936.00122508. Epub 2008 Oct 1.
• Background Tsang KW, Tan KC, Ho PL, Ooi GC, Ho JC, Mak J, Tipoe GL, Ko C, Yan C, Lam WK, Chan-Yeung M. Inhaled fluticasone in bronchiectasis: a 12 month study. Thorax. 2005 Mar;60(3):239-43. doi: 10.1136/thx.2002.003236.
• Background Pasteur MC, Bilton D, Hill AT; British Thoracic Society Bronchiectasis non-CF Guideline Group. British Thoracic Society guideline for non-CF bronchiectasis. Thorax. 2010 Jul;65 Suppl 1:i1-58. doi: 10.1136/thx.2010.136119.
• Background Tsang KW, Ho PL, Lam WK, Ip MS, Chan KN, Ho CS, Ooi CC, Yuen KY. Inhaled fluticasone reduces sputum inflammatory indices in severe bronchiectasis. Am J Respir Crit Care Med. 1998 Sep;158(3):723-7. doi: 10.1164/ajrccm.158.3.9710090.
• Background Tsang KW, Chan K, Ho P, Zheng L, Ooi GC, Ho JC, Lam W. Sputum elastase in steady-state bronchiectasis. Chest. 2000 Feb;117(2):420-6. doi: 10.1378/chest.117.2.420.
• Background Laszlo G. Standardisation of lung function testing: helpful guidance from the ATS/ERS Task Force. Thorax. 2006 Sep;61(9):744-6. doi: 10.1136/thx.2006.061648.
• Background Zheng J, Zhong N. Normative values of pulmonary function testing in Chinese adults. Chin Med J (Engl). 2002 Jan;115(1):50-4.
• Results Chalmers JD, Smith MP, McHugh BJ, Doherty C, Govan JR, Hill AT. Short- and long-term antibiotic treatment reduces airway and systemic inflammation in non-cystic fibrosis bronchiectasis. Am J Respir Crit Care Med. 2012 Oct 1;186(7):657-65. doi: 10.1164/rccm.201203-0487OC. Epub 2012 Jun 28.
• Results Kapur N, Masters IB, Chang AB. Exacerbations in noncystic fibrosis bronchiectasis: Clinical features and investigations. Respir Med. 2009 Nov;103(11):1681-7. doi: 10.1016/j.rmed.2009.05.007. Epub 2009 Jun 6.
• Guan WJ, Yuan JJ, Gao YH, Li HM, Zheng JP, Chen RC, Zhong NS. Maximal mid-expiratory flow is a surrogate marker of lung clearance index for assessment of adults with bronchiectasis. Sci Rep. 2016 Jun 24;6:28467. doi: 10.1038/srep28467.
• Guan WJ, Gao YH, Xu G, Li HM, Yuan JJ, Zheng JP, Chen RC, Zhong NS. Bronchodilator response in adults with bronchiectasis: correlation with clinical parameters and prognostic implications. J Thorac Dis. 2016 Jan;8(1):14-23. doi: 10.3978/j.issn.2072-1439.2016.01.05.
• Guan WJ, Gao YH, Xu G, Lin ZY, Tang Y, Li HM, Lin ZM, Jiang M, Zheng JP, Chen RC, Zhong NS. Inflammatory Responses, Spirometry, and Quality of Life in Subjects With Bronchiectasis Exacerbations. Respir Care. 2015 Aug;60(8):1180-9. doi: 10.4187/respcare.04004. Epub 2015 Jun 9.
• Guan WJ, Gao YH, Xu G, Lin ZY, Tang Y, Li HM, Lin ZM, Zheng JP, Chen RC, Zhong NS. Impulse oscillometry in adults with bronchiectasis. Ann Am Thorac Soc. 2015 May;12(5):657-65. doi: 10.1513/AnnalsATS.201406-280OC.
• Guan WJ, Gao YH, Xu G, Lin ZY, Tang Y, Li HM, Lin ZM, Zheng JP, Chen RC, Zhong NS. Characterization of lung function impairment in adults with bronchiectasis. PLoS One. 2014 Nov 18;9(11):e113373. doi: 10.1371/journal.pone.0113373. eCollection 2014.

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Indications