Bacterial proteases and haemostasis dysregulation in the CF lung

详细信息    查看全文

• 作者：James A. Reihill^a ; Michelle Moreland^a ; Gavin E. Jarvis^a ; ^c ; Andrew McDowell^b ; ^d ; Gisli G. Einarsson^a ; J. Stuart Elborn^b ; S. Lorraine Martin^a ; ^{l.martin@qub.ac.uk}
• 关键词：CF ; cystic fibrosis ; BC-CFB ; biofilm-conditioned cell-free broth
• 刊名：Journal of Cystic Fibrosis
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：16
• 期：1
• 页码：49-57
• 全文大小：923 K
• 卷排序：16

文摘

Pathogenic bacteria which chronically colonise the cystic fibrosis (CF) lung produce a number of virulence determinants, including distinct proteolytic activities. The potential role bacterial proteases play on haemostatic dysregulation within the CF lung is, however, poorly defined, despite haemoptysis being a common complication in CF.MethodsThe potential impact of known CF pathogens (Pseudomonas aeruginosa and Burkholderia cepacia complex spp.) on haemostasis was examined for their ability to degrade fibrinogen and dysregulate fibrin clot formation and platelet aggregation.ResultsResults demonstrate that key CF pathogens growing as a biofilm on mucin exhibit considerable fibrinogenolytic activity, resulting in fibrinogen breakdown, impaired clot formation, and modulation of platelet aggregation. Human neutrophil elastase may also contribute to fibrinogen breakdown and dysregulated clot formation at high concentration.ConclusionBacterial-derived proteases may play an important role in the dysregulation of airway haemostasis, and potentially contribute to episodes of haemoptysis within the CF lung.