Abstract:
:Retention in the extrathoracic airways, and clearance by nose blowing, of monodisperse indium-111-labeled polystyrene particles were followed for at least 2 days after inhalation by healthy volunteers. Nine volunteers inhaled 3-μm aerodynamic diameter particles while sitting at rest, whereas subgroups of 3 or 4 inhaled 1.5-μm or 6-μm particles at rest, and 3-μm or 6-μm particles while performing light exercise. Retention of the initial extrathoracic deposit (IETD) in the extrathoracic airways was described by 4 components: on average 19% IETD cleared by nose blowing; 15% was swallowed before the first measurement, a few minutes after inhalation; 21% cleared by mucociliary action between the first measurement and about an hour later; and 45% subsequently cleared by mucociliary action. Geometric mean times in which 50% and 90% of IETD cleared were 2.5 and 22 hours. The geometric mean retention fractions at 24 and 48 hours were 7% and 2.4% IETD, respectively. No clear trends were found between parameters describing retention and any related to deposition (e.g., particle size). However, the fraction cleared by nose blowing was related to the frequency of nose blowing and therefore appears to be a characteristic of the individual.
journal_name
Exp Lung Resjournal_title
Experimental lung researchauthors
Smith JR,Bailey MR,Etherington G,Shutt AL,Youngman MJdoi
10.3109/01902148.2010.518301subject
Has Abstractpub_date
2011-03-01 00:00:00pages
109-29issue
2eissn
0190-2148issn
1521-0499journal_volume
37pub_type
杂志文章abstract::Three-day-old rabbits were given intratracheal injections of radiolabeled natural sheep surfactant, rabbit surfactant, or liposomes of dipalmitoylphosphatidylcholine that contained greater than three times the quantity of phosphatidylcholine present in the endogenous surfactant pool. The recoveries of radiolabeled pho...
journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902148509057525
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abstract::Investigators disagree on the amount of hydrogen peroxide (H2O2) released by resting and stimulated alveolar macrophages. The method commonly used to measure H2O2 release involves horseradish peroxidase (HRP)-catalyzed oxidation of scopoletin by H2O2. We describe an artifact in this method that may explain the seeming...
journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902148409087899
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journal_title:Experimental lung research
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journal_title:Experimental lung research
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doi:10.3109/01902149809099591
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journal_title:Experimental lung research
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abstract::Cyclin D1 dysregulation and differential inactivation of p16INK4a and Rb have been observed in human lung cancer. In chemically induced mouse lung tumors, the p16INK4a gene is a target of inactivation, and Rb is reduced at the mRNA level (Northern blot) although similar at the protein level (Western blot) when compare...
journal_title:Experimental lung research
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doi:10.3109/01902149809087383
更新日期:1998-07-01 00:00:00
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journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902149009087876
更新日期:1990-03-01 00:00:00
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journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902148009057514
更新日期:1980-03-01 00:00:00
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journal_title:Experimental lung research
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journal_title:Experimental lung research
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journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.1080/019021499270439
更新日期:1999-01-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Serum amyloid A (SAA), an acute-phase protein whose level tracks infection and inflammation, is the precursor protein of amyloid A (AA) fibrils that is thought to cause AA amyloidosis in human and animals. SAA protein has several isoforms based on the difference of amino acid sequence, such as SA...
journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.1080/01902148.2020.1809750
更新日期:2020-11-01 00:00:00
abstract::This study investigated whether interleukin-1 (IL-1) inhibitory activity in LPS-stimulated culture supernatants of alveolar macrophages and epithelioid cells obtained from rabbit lung granulomas induced by complete Freund's adjuvant (CFA) was identical to IL-1 receptor antagonist (IL-1ra) and examined the changes of I...
journal_title:Experimental lung research
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doi:10.3109/01902149509068834
更新日期:1995-03-01 00:00:00
abstract::Paraquat accumulation into rat lung slices was unaffected by hypoxia (PO2 = 645 mm Hg) but was inhibited by hypoxia. The IC50 (IC50 = partial pressure of O2 resulting in a 50% inhibition of paraquat accumulation) for paraquat accumulation was P02 = 50 mm Hg; significant accumulation could be observed after 1 or 2 hr o...
journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902148009065463
更新日期:1980-08-01 00:00:00
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journal_title:Experimental lung research
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doi:10.3109/01902148709064313
更新日期:1987-01-01 00:00:00
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doi:10.1080/0190214049049552
更新日期:2005-03-01 00:00:00
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journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.1080/01902148.2017.1318975
更新日期:2017-04-01 00:00:00
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journal_title:Experimental lung research
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doi:10.3109/01902148.2011.633306
更新日期:2012-02-01 00:00:00
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journal_title:Experimental lung research
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journal_title:Experimental lung research
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doi:10.3109/01902149209031693
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journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902148809087842
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journal_title:Experimental lung research
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journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.1080/01902140490463142
更新日期:2004-07-01 00:00:00
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journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902148609058290
更新日期:1986-01-01 00:00:00
abstract::The effects of urban air and diesel particles on inflammatory cytokine gene expression, tumor necrosis factor alpha (TNF-alpha) in particular, were studied in rat alveolar macrophages. TNF-alpha, interleukin (IL)-1, IL-6, cytokine-induced neutrophil chemoattractant (CINC), and macrophage inflammatory protein (MIP)-2 g...
journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902149609046043
更新日期:1996-09-01 00:00:00
abstract:PURPOSE:This study was prospectively designed to investigate the effects of different concentrations of isoflurane (ISO) pretreatment on respiratory mechanics, oxygenation, and hemodynamics in lipopolysaccharide (LPS)-induced acute respiratory distress syndrome (ARDS) model of juvenile piglets. METHODS:Twenty-four pig...
journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902148.2015.1054530
更新日期:2015-01-01 00:00:00
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journal_title:Experimental lung research
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更新日期:2013-10-01 00:00:00
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journal_title:Experimental lung research
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doi:10.3109/01902148409087896
更新日期:1984-01-01 00:00:00
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journal_title:Experimental lung research
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更新日期:2014-02-01 00:00:00
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journal_title:Experimental lung research
pub_type: 杂志文章
doi:10.3109/01902149009108848
更新日期:1990-07-01 00:00:00