Document Detail

Effects of keratinocyte growth factor on intra-alveolar surfactant fixed in situ: Quantitative ultrastructural and immunoelectron microscopic analysis.
MedLine Citation:
PMID:  17516448     Owner:  NLM     Status:  MEDLINE    
Quantitative (immuno) transmission electron microscopy using design-based stereology was performed on specimens collected by means of systematic uniform random sampling of rat lungs, which were fixed by vascular perfusion to stabilize intra-alveolar surfactant in situ. This procedure ensures that the data recorded are representative of the whole organ. Ultrathin sections of specimens embedded at low temperature in Lowicryl HM20 were labeled by indirect immuno-gold staining for surfactant protein A. We observed that, 3 days after treatment of lungs in vivo with truncated keratinocyte growth factor (DeltaN23-KGF), a potent mitogen of alveolar epithelial type II cells, surfactant protein A associated with the tubular myelin fraction of intra-alveolar surfactant was increased by 47% in comparison with buffer-treated control lungs. Despite the marked type II cell hyperplasia, the relative amount of ultrastructural surfactant subtypes was not significantly affected. Because surfactant protein A reduces the sensitivity to inhibition of the biophysical activity of surfactant by exudating plasma proteins, we propose that pretreatment of lungs with DeltaN23-KGF ameliorates adverse effects observed in acute lung injury following, for example, ischemia and reperfusion.
Heinz Fehrenbach; Antonia Fehrenbach; Erik Dietzel; Thomas Tschernig; Norbert Krug; Veronika Grau; Jens M Hohlfeld
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Anatomical record (Hoboken, N.J. : 2007)     Volume:  290     ISSN:  1932-8486     ISO Abbreviation:  Anat Rec (Hoboken)     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-07-31     Completed Date:  2007-09-21     Revised Date:  2009-12-16    
Medline Journal Info:
Nlm Unique ID:  101292775     Medline TA:  Anat Rec (Hoboken)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  974-80     Citation Subset:  IM    
Copyright Information:
(c) 2007 Wiley-Liss, Inc
Clinical Research Group "Chronic Airway Diseases", Clinic of Internal Medicine (Respiratory Medicine), Philipps-University Marburg, Baldingerstrasse, Marburg Germany.
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MeSH Terms
Fibroblast Growth Factor 7 / pharmacology*
Microscopy, Electron, Transmission / methods*
Microscopy, Immunoelectron / methods*
Myelin Sheath / drug effects,  metabolism
Pulmonary Alveoli / drug effects,  metabolism,  ultrastructure
Pulmonary Surfactant-Associated Protein A / drug effects,  metabolism
Pulmonary Surfactant-Associated Protein B / drug effects,  metabolism
Pulmonary Surfactants / metabolism*
Rats, Inbred BN
Reperfusion Injury / prevention & control
Respiratory Distress Syndrome, Adult / prevention & control
Tissue Fixation / methods
Reg. No./Substance:
0/Pulmonary Surfactant-Associated Protein A; 0/Pulmonary Surfactant-Associated Protein B; 0/Pulmonary Surfactants; 126469-10-1/Fibroblast Growth Factor 7

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