Abstract:
:A noninvasive method to characterize inflammation and infection in the airways of nonexpectorating children with cystic fibrosis (CF) is needed for clinical and research purposes. Accordingly, we performed sputum inductions by administering 3% saline to 11 healthy control children and 20 children with CF, composed of 7 sputum producers (capable of spontaneously expectorating sputum) and 13 nonproducers. Induced sputum weights were comparable in each group, whereas the amount of induced sputum collected from the CF producers was over 10-fold higher than the spontaneously expectorated samples. We found a significant increase in indices of airway inflammation, including total cell counts, absolute neutrophil counts, interleukin-8 (IL-8) levels, and neutrophil elastase activity in the CF subjects compared with the healthy control subjects. These same indices in the induced sputum specimens from CF producers were significantly correlated with levels in the matched expectorated sputum specimens. Sputum total protein concentration was elevated in the CF groups, whereas urea and albumin levels were not significantly different. Salivary analysis, performed separately, revealed higher levels of IL-8 and total protein in the CF groups. Airway infection, as assessed by quantitative counts of CF-related bacterial pathogens, was also higher in the CF subjects. The same bacterial pathogens, in similar colony counts, were isolated from both the induced and expectorated sputum samples from the CF producers. We conclude that airway inflammation and infection, assessed through sputum induction, are significantly increased in children with CF as compared with healthy children. Furthermore, induced sputum samples are similar to spontaneously expectorated samples in describing both inflammation and infection in the CF airway.
journal_name
Am J Respir Crit Care Medauthors
Sagel SD,Kapsner R,Osberg I,Sontag MK,Accurso FJdoi
10.1164/ajrccm.164.8.2104075keywords:
subject
Has Abstractpub_date
2001-10-15 00:00:00pages
1425-31issue
8 Pt 1eissn
1073-449Xissn
1535-4970journal_volume
164pub_type
杂志文章abstract::In normal airways, invasion of small numbers of pathogenic bacteria will not give rise to injury or local colonization. In chronic obstructive pulmonary disease, however, local conditions are changed, which may impair local defense systems and facilitate infection. These include: (1) factors promoting bacterial adhere...
journal_title:American journal of respiratory and critical care medicine
pub_type: 杂志文章,评审
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abstract:RATIONALE:Immunophenotypes of antiviral responses, and their relationship with asthma, allergy, and lower respiratory tract infections, are poorly understood. OBJECTIVES:We characterized multiple cytokine responses of peripheral blood mononuclear cells to rhinovirus stimulation, and their relationship with clinical ou...
journal_title:American journal of respiratory and critical care medicine
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journal_title:American journal of respiratory and critical care medicine
pub_type: 杂志文章,多中心研究
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journal_title:American journal of respiratory and critical care medicine
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2000-06-01 00:00:00
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journal_title:American journal of respiratory and critical care medicine
pub_type: 临床试验,杂志文章,多中心研究
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更新日期:2001-05-01 00:00:00
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更新日期:2010-05-01 00:00:00
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journal_title:American journal of respiratory and critical care medicine
pub_type: 杂志文章
doi:10.1164/ajrccm.156.6.9702087
更新日期:1997-12-01 00:00:00
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journal_title:American journal of respiratory and critical care medicine
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更新日期:1995-03-01 00:00:00
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journal_title:American journal of respiratory and critical care medicine
pub_type: 杂志文章
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更新日期:1997-06-01 00:00:00
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journal_title:American journal of respiratory and critical care medicine
pub_type: 杂志文章
doi:10.1164/rccm.201312-2210OC
更新日期:2014-07-15 00:00:00
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journal_title:American journal of respiratory and critical care medicine
pub_type: 杂志文章
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更新日期:2018-06-04 00:00:00
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更新日期:2015-12-15 00:00:00
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journal_title:American journal of respiratory and critical care medicine
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1995-08-01 00:00:00
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更新日期:2016-03-01 00:00:00
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更新日期:2010-11-15 00:00:00
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pub_type: 杂志文章
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更新日期:1994-11-01 00:00:00
abstract:RATIONALE:Obstructive sleep apnea (OSA) is a highly prevalent disorder in children, in which enlarged adenotonsillar tissues (AT) play a major pathophysiologic role. Mechanisms leading to the proliferation and hypertrophy of AT in children who subsequently develop OSA remain unknown, and surgical extirpation of AT is a...
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更新日期:2010-05-15 00:00:00
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更新日期:2012-01-15 00:00:00
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pub_type: 杂志文章,实务指引
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更新日期:2012-05-01 00:00:00
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journal_title:American journal of respiratory and critical care medicine
pub_type: 杂志文章
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更新日期:2001-10-01 00:00:00
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journal_title:American journal of respiratory and critical care medicine
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更新日期:2012-08-01 00:00:00
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journal_title:American journal of respiratory and critical care medicine
pub_type: 历史文章,杂志文章
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更新日期:2005-06-01 00:00:00