Document Detail


Nitric oxide and endothelial permeability.
MedLine Citation:
PMID:  9390966     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Nitric oxide synthase inhibition reverses systemic vasodilation during sepsis but may increase endothelial permeability. To assess adverse effects on the pulmonary vasculature, 12 sheep were chronically instrumented with lung lymph fistulas and hydraulic pulmonary venous occluders. Escherichia coli endotoxin (lipopolysaccharide; 10 ng . kg-1 . min-1) was continuously infused for 32 h. After 24 h, six animals received 25 mg/kg of Nomega-nitro-L-arginine methyl ester (L-NAME), and six received saline. All sheep developed a hyperdynamic circulatory response and elevated lymph flows by 24 h of lipopolysaccharide infusion. L-NAME reversed systemic vasodilation, increased pre- and postcapillary pulmonary vascular resistance index, pulmonary arterial pressure, and, transiently, effective pulmonary capillary pressure. Lung lymph flows were not different between groups at 24 h or thereafter. Calculated as changes from baseline, however, lung lymph flow was higher in the L-NAME group than in the control animals, with a trend toward lower lymph-to-plasma protein concentration ratio at 25 h. Permeability analysis at 32 h by the venous occlusion technique showed normal reflection coefficients and elevated filtration coefficients without differences between groups. Reversal by L-NAME of the systemic vasodilation during endotoxemia was associated with high pulmonary vascular resistance without evidence of impaired pulmonary endothelial barrier function.
Authors:
F Hinder; M Booke; L D Traber; D L Traber
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  83     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1997 Dec 
Date Detail:
Created Date:  1998-02-10     Completed Date:  1998-02-10     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1941-6     Citation Subset:  IM    
Affiliation:
Klinik und Poliklinik für Anästhesiologie und operative Intensivmedizin, der Westfälischen Wilhelms-Universität, Münster, Germany.
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MeSH Terms
Descriptor/Qualifier:
Animals
Blood Pressure / drug effects
Capillary Permeability / drug effects,  physiology*
Cardiac Output / drug effects,  physiology
Endothelium, Vascular / drug effects,  physiology*
Enzyme Inhibitors / pharmacology
Female
NG-Nitroarginine Methyl Ester / pharmacology
Nitric Oxide / physiology*
Nitric Oxide Synthase / antagonists & inhibitors
Pulmonary Circulation / drug effects
Pulmonary Edema / physiopathology
Pulmonary Wedge Pressure / drug effects
Sheep
Sleep / physiology
Chemical
Reg. No./Substance:
0/Enzyme Inhibitors; 10102-43-9/Nitric Oxide; 50903-99-6/NG-Nitroarginine Methyl Ester; EC 1.14.13.39/Nitric Oxide Synthase

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