Abstract:
:Neutrophil elastase is present at high levels in airway fluid of patients with cystic fibrosis (CF), and is responsible for considerable inflammatory damage. Human monocyte/neutrophil elastase inhibitor (MNEI), a 42-kDa serpin protein, is an effective inhibitor of neutrophil elastase, cathepsin G, and proteinase-3, related proteases released from inflammatory neutrophils. We hypothesized that recombinant MNEI would reduce inflammatory damage and enhance bacterial clearance from the lung in an animal model of chronic Pseudomonas aeruginosa infection. In vitro studies showed that MNEI causes dose-dependent inhibition of the activity of rat neutrophil elastase. Recombinant MNEI was administered daily by aerosolization to rats previously inoculated with agar beads containing P. aeruginosa to initiate chronic infection. Administered MNEI was partially recovered in lavage fluid of treated rats as a 66-kDa complex with protease indicative of in vivo inhibition of elastase or a related protease. Aerosol treatment with MNEI significantly decreased the extent of inflammatory injury, quantified as the histopathology score. MNEI, which had no bactericidal effect on P. aeruginosa in vitro, significantly enhanced clearance of bacteria from infected rat lungs. The reduction of histopathology scores and enhancement of bacterial killing were evident 6 hr after a single aerosol treatment with MNEI. These findings indicate an important function of MNEI in protecting innate antimicrobial defense. Similar results were previously obtained for aerosolized prolastin (alpha1-antitrypsin), indicating that enhanced bacterial clearance by MNEI is due to inhibition of neutrophil protease. These findings demonstrate the value of this nonantibiotic protease inhibitor as an adjunct for the treatment and prevention of the infection component of CF lung disease.
journal_name
Pediatr Pulmonoljournal_title
Pediatric pulmonologyauthors
Woods DE,Cantin A,Cooley J,Kenney DM,Remold-O'Donnell Edoi
10.1002/ppul.20167subject
Has Abstractpub_date
2005-02-01 00:00:00pages
141-9issue
2eissn
8755-6863issn
1099-0496journal_volume
39pub_type
杂志文章abstract::Pulmonary function testing and monitoring plays an important role in the respiratory management of neonates. A noninvasive and complete bedside evaluation of the respiratory status is especially useful in critically ill neonates to assess disease severity and resolution and the response to pharmacological intervention...
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journal_title:Pediatric pulmonology
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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journal_title:Pediatric pulmonology
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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journal_title:Pediatric pulmonology
pub_type: 临床试验,杂志文章
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更新日期:1999-03-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.22814
更新日期:2014-03-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章,多中心研究
doi:10.1002/ppul.23167
更新日期:2015-12-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1992-06-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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更新日期:1986-01-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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更新日期:2017-03-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
doi:10.1002/ppul.24286
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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更新日期:2010-09-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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更新日期:2011-10-01 00:00:00
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journal_title:Pediatric pulmonology
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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更新日期:2006-09-01 00:00:00
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journal_title:Pediatric pulmonology
pub_type: 杂志文章
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