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Alveolar epithelial fluid transport can be simultaneously upregulated by both KGF and beta -agonist therapy

Cardiovascular Research Institute and Departments of Medicine, Anesthesia, and Physiology, University of California, San Francisco, California 94143-0130 Although keratinocyte growth factor (KGF) protects against experimental acute lung injury, the mechanisms for the protective effect are incomplete...

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Published in:Journal of applied physiology (1985) 1999-11, Vol.87 (5), p.1852-1860
Main Authors: Wang, Yibing, Folkesson, Hans G, Jayr, Christian, Ware, Lorraine B, Matthay, Michael A
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description Cardiovascular Research Institute and Departments of Medicine, Anesthesia, and Physiology, University of California, San Francisco, California 94143-0130 Although keratinocyte growth factor (KGF) protects against experimental acute lung injury, the mechanisms for the protective effect are incompletely understood. Therefore, the time-dependent effects of KGF on alveolar epithelial fluid transport were studied in rats 48-240 h after intratracheal administration of KGF (5   mg/kg). There was a marked proliferative response to KGF, measured both by in vivo bromodeoxyuridine staining and by staining with an antibody to a type II cell antigen. In controls, alveolar liquid clearance (ALC) was 23 ± 3%/h. After KGF pretreatment, ALC was significantly increased to 30 ± 2%/h at 48 h, to 39 ± 2%/h at 72 h, and to 36 ± 3%/h at 120 h compared with controls ( P  
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Therefore, the time-dependent effects of KGF on alveolar epithelial fluid transport were studied in rats 48-240 h after intratracheal administration of KGF (5   mg/kg). There was a marked proliferative response to KGF, measured both by in vivo bromodeoxyuridine staining and by staining with an antibody to a type II cell antigen. In controls, alveolar liquid clearance (ALC) was 23 ± 3%/h. After KGF pretreatment, ALC was significantly increased to 30 ± 2%/h at 48 h, to 39 ± 2%/h at 72 h, and to 36 ± 3%/h at 120 h compared with controls ( P  &lt; 0.05). By 240 h, ALC had returned to near-control levels (26 ± 2%/h). The increase in ALC was explained primarily by the proliferation of alveolar type II cells, since there was a good correlation between the number of alveolar type II cells and the increase in ALC ( r  = 0.92,  P  = 0.02). The fraction of ALC inhibited by amiloride was similar in control rats (33%) as in 72-h KGF-pretreated rats (38%), indicating that there was probably no major change in the apical pathways for Na uptake in the KGF-pretreated rats at this time point. However, more rapid ALC at 120 h, compared with 48 h after KGF treatment, may be explained by greater maturation of -epithelial Na channel, since its expression was greater at 120 than at 48 h, whereas the number of type II cells was the same at these two time points. -Adrenergic stimulation with terbutaline 72 h after KGF pretreatment further increased ALC to 50 ± 7%/h ( P  &lt; 0.5). In summary, KGF induced a sustained increase over 120   h in the fluid transport capacity of the alveolar epithelium. This impressive upregulation in fluid transport was further enhanced with -adrenergic agonist therapy, thus providing evidence that two different treatments can simultaneously increase the fluid transport capacity of the alveolar epithelium. keratinocyte growth factor; pulmonary edema; acute lung injury; lung fluid balance; lung fluid clearance</description><identifier>ISSN: 8750-7587</identifier><identifier>EISSN: 1522-1601</identifier><identifier>DOI: 10.1152/jappl.1999.87.5.1852</identifier><identifier>PMID: 10562630</identifier><identifier>CODEN: JAPHEV</identifier><language>eng</language><publisher>Bethesda, MD: Am Physiological Soc</publisher><subject>Adrenergic beta-Agonists - pharmacology ; Air breathing ; Amiloride - pharmacology ; Anatomy &amp; physiology ; Animals ; Biological and medical sciences ; Blotting, Northern ; Body Fluids - physiology ; Diuretics - pharmacology ; Epithelial Cells - drug effects ; Epithelial Cells - metabolism ; Epithelium - drug effects ; Epithelium - metabolism ; Fibroblast Growth Factor 10 ; Fibroblast Growth Factor 7 ; Fibroblast Growth Factors ; Fundamental and applied biological sciences. Psychology ; Growth Substances - pharmacology ; Injuries ; Lungs ; Male ; Permeability ; Pulmonary Alveoli - drug effects ; Pulmonary Alveoli - metabolism ; Rats ; Rats, Sprague-Dawley ; Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics ; Sodium Channel Blockers ; Sodium Channels - biosynthesis ; Terbutaline - pharmacology ; Time Factors ; Up-Regulation - drug effects ; Vertebrates: respiratory system</subject><ispartof>Journal of applied physiology (1985), 1999-11, Vol.87 (5), p.1852-1860</ispartof><rights>2000 INIST-CNRS</rights><rights>Copyright American Physiological Society Nov 1999</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c483t-1a3176f1d4248f2eb48d72a98ddb649c6180d11782ffcc6a59c11826cfe4459c3</citedby><cites>FETCH-LOGICAL-c483t-1a3176f1d4248f2eb48d72a98ddb649c6180d11782ffcc6a59c11826cfe4459c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=1214801$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/10562630$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Wang, Yibing</creatorcontrib><creatorcontrib>Folkesson, Hans G</creatorcontrib><creatorcontrib>Jayr, Christian</creatorcontrib><creatorcontrib>Ware, Lorraine B</creatorcontrib><creatorcontrib>Matthay, Michael A</creatorcontrib><title>Alveolar epithelial fluid transport can be simultaneously upregulated by both KGF and beta -agonist therapy</title><title>Journal of applied physiology (1985)</title><addtitle>J Appl Physiol (1985)</addtitle><description>Cardiovascular Research Institute and Departments of Medicine, Anesthesia, and Physiology, University of California, San Francisco, California 94143-0130 Although keratinocyte growth factor (KGF) protects against experimental acute lung injury, the mechanisms for the protective effect are incompletely understood. Therefore, the time-dependent effects of KGF on alveolar epithelial fluid transport were studied in rats 48-240 h after intratracheal administration of KGF (5   mg/kg). There was a marked proliferative response to KGF, measured both by in vivo bromodeoxyuridine staining and by staining with an antibody to a type II cell antigen. In controls, alveolar liquid clearance (ALC) was 23 ± 3%/h. After KGF pretreatment, ALC was significantly increased to 30 ± 2%/h at 48 h, to 39 ± 2%/h at 72 h, and to 36 ± 3%/h at 120 h compared with controls ( P  &lt; 0.05). By 240 h, ALC had returned to near-control levels (26 ± 2%/h). The increase in ALC was explained primarily by the proliferation of alveolar type II cells, since there was a good correlation between the number of alveolar type II cells and the increase in ALC ( r  = 0.92,  P  = 0.02). The fraction of ALC inhibited by amiloride was similar in control rats (33%) as in 72-h KGF-pretreated rats (38%), indicating that there was probably no major change in the apical pathways for Na uptake in the KGF-pretreated rats at this time point. However, more rapid ALC at 120 h, compared with 48 h after KGF treatment, may be explained by greater maturation of -epithelial Na channel, since its expression was greater at 120 than at 48 h, whereas the number of type II cells was the same at these two time points. -Adrenergic stimulation with terbutaline 72 h after KGF pretreatment further increased ALC to 50 ± 7%/h ( P  &lt; 0.5). In summary, KGF induced a sustained increase over 120   h in the fluid transport capacity of the alveolar epithelium. 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Psychology</topic><topic>Growth Substances - pharmacology</topic><topic>Injuries</topic><topic>Lungs</topic><topic>Male</topic><topic>Permeability</topic><topic>Pulmonary Alveoli - drug effects</topic><topic>Pulmonary Alveoli - metabolism</topic><topic>Rats</topic><topic>Rats, Sprague-Dawley</topic><topic>Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics</topic><topic>Sodium Channel Blockers</topic><topic>Sodium Channels - biosynthesis</topic><topic>Terbutaline - pharmacology</topic><topic>Time Factors</topic><topic>Up-Regulation - drug effects</topic><topic>Vertebrates: respiratory system</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Yibing</creatorcontrib><creatorcontrib>Folkesson, Hans G</creatorcontrib><creatorcontrib>Jayr, Christian</creatorcontrib><creatorcontrib>Ware, Lorraine B</creatorcontrib><creatorcontrib>Matthay, Michael A</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium &amp; Calcified Tissue Abstracts</collection><collection>Chemoreception Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>Physical Education Index</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of applied physiology (1985)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Yibing</au><au>Folkesson, Hans G</au><au>Jayr, Christian</au><au>Ware, Lorraine B</au><au>Matthay, Michael A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Alveolar epithelial fluid transport can be simultaneously upregulated by both KGF and beta -agonist therapy</atitle><jtitle>Journal of applied physiology (1985)</jtitle><addtitle>J Appl Physiol (1985)</addtitle><date>1999-11-01</date><risdate>1999</risdate><volume>87</volume><issue>5</issue><spage>1852</spage><epage>1860</epage><pages>1852-1860</pages><issn>8750-7587</issn><eissn>1522-1601</eissn><coden>JAPHEV</coden><abstract>Cardiovascular Research Institute and Departments of Medicine, Anesthesia, and Physiology, University of California, San Francisco, California 94143-0130 Although keratinocyte growth factor (KGF) protects against experimental acute lung injury, the mechanisms for the protective effect are incompletely understood. Therefore, the time-dependent effects of KGF on alveolar epithelial fluid transport were studied in rats 48-240 h after intratracheal administration of KGF (5   mg/kg). There was a marked proliferative response to KGF, measured both by in vivo bromodeoxyuridine staining and by staining with an antibody to a type II cell antigen. In controls, alveolar liquid clearance (ALC) was 23 ± 3%/h. After KGF pretreatment, ALC was significantly increased to 30 ± 2%/h at 48 h, to 39 ± 2%/h at 72 h, and to 36 ± 3%/h at 120 h compared with controls ( P  &lt; 0.05). By 240 h, ALC had returned to near-control levels (26 ± 2%/h). The increase in ALC was explained primarily by the proliferation of alveolar type II cells, since there was a good correlation between the number of alveolar type II cells and the increase in ALC ( r  = 0.92,  P  = 0.02). The fraction of ALC inhibited by amiloride was similar in control rats (33%) as in 72-h KGF-pretreated rats (38%), indicating that there was probably no major change in the apical pathways for Na uptake in the KGF-pretreated rats at this time point. However, more rapid ALC at 120 h, compared with 48 h after KGF treatment, may be explained by greater maturation of -epithelial Na channel, since its expression was greater at 120 than at 48 h, whereas the number of type II cells was the same at these two time points. -Adrenergic stimulation with terbutaline 72 h after KGF pretreatment further increased ALC to 50 ± 7%/h ( P  &lt; 0.5). In summary, KGF induced a sustained increase over 120   h in the fluid transport capacity of the alveolar epithelium. 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subjects Adrenergic beta-Agonists - pharmacology
Air breathing
Amiloride - pharmacology
Anatomy & physiology
Animals
Biological and medical sciences
Blotting, Northern
Body Fluids - physiology
Diuretics - pharmacology
Epithelial Cells - drug effects
Epithelial Cells - metabolism
Epithelium - drug effects
Epithelium - metabolism
Fibroblast Growth Factor 10
Fibroblast Growth Factor 7
Fibroblast Growth Factors
Fundamental and applied biological sciences. Psychology
Growth Substances - pharmacology
Injuries
Lungs
Male
Permeability
Pulmonary Alveoli - drug effects
Pulmonary Alveoli - metabolism
Rats
Rats, Sprague-Dawley
Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics
Sodium Channel Blockers
Sodium Channels - biosynthesis
Terbutaline - pharmacology
Time Factors
Up-Regulation - drug effects
Vertebrates: respiratory system
title Alveolar epithelial fluid transport can be simultaneously upregulated by both KGF and beta -agonist therapy
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