Document Detail


Role of lipids in bone marrow-induced pulmonary edema.
MedLine Citation:
PMID:  3571064     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We examined the mechanism of the bone marrow-induced pulmonary edema in the isolated Ringer-perfused rabbit lung. Bone marrow administration (0.2 ml/kg body wt) increased pulmonary arterial pressure, capillary pressure, arterial resistance, and venous resistance within 2-4 min. Bone marrow also produced marked increases in lung wet weight and the capillary filtration coefficient but at later time points (90-120 min) during the perfusion. Only the triglyceride-containing lipid component of the bone marrow produced increases in pulmonary hemodynamics, lung wet weight, and the capillary filtration coefficient comparable to those observed after bone marrow. Bone marrow and the lipid component of bone marrow both produced increases in venous effluent lipoprotein lipase activity (the enzyme responsible for hydrolysis of triglycerides to free fatty acids). Bone marrow also stimulated the production of thromboxane B2 but not 6-ketoprostaglandin F1 alpha in the perfused lung. Both meclofenamate (1 microM), a cyclooxygenase inhibitor, and U-60,257 (10 microM), a lipoxygenase inhibitor, attenuated the bone marrow-induced pulmonary hemodynamic response, whereas only U-60,257 attenuated the increases in lung wet weight and the capillary filtration coefficient. In conclusion, pulmonary embolization induced by bone marrow results in increases in lung weight and the capillary filtration coefficient in the isolated Ringer-perfused rabbit lung. Pulmonary vasoconstriction is partially dependent on arachidonic acid metabolites but appears to be independent of circulating blood-formed elements. The lipid component of bone marrow or products derived from this component (e.g., free fatty acids and lipoxygenase products) may mediate the bone marrow-induced pulmonary edema.
Authors:
W M Selig; K E Burhop; A B Malik
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Publication Detail:
Type:  In Vitro; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  62     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1987 Mar 
Date Detail:
Created Date:  1987-06-16     Completed Date:  1987-06-16     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:  1068-75     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Arachidonic Acids / pharmacology
Bone Marrow / physiology*
Capillaries / physiology
Kinetics
Lipids / physiology*
Lipoprotein Lipase / metabolism
Lung / physiopathology
Perfusion
Pulmonary Circulation*
Pulmonary Edema / etiology,  physiopathology*
Rabbits
Grant Support
ID/Acronym/Agency:
HL-07529/HL/NHLBI NIH HHS; HL-32418/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
0/Arachidonic Acids; 0/Lipids; EC 3.1.1.34/Lipoprotein Lipase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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