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pubmed-article:6500385pubmed:abstractTextUptake of radioiodinated Lys-plasminogen (125I-PLG), albumin (125I-ALB), and tritiated water (3H-H2O) by in vitro thrombi and interchange of these molecules with blood in an in vitro perfusion system were investigated. The radioisotopes were taken up by thrombi either by incorporation during formation in radiolabelled blood or by perfusion of preformed nonradioactive thrombi in radiolabelled blood. Release of the radioisotopes into a perfusion medium of nonradiolabelled blood was then monitored over a 120-min period. The small molecules of 3H-H2O were rapidly released from the thrombi and achieved equilibrium with the perfusion medium by 120 min in that the specific radioactivity (cpm/mg) of the thrombi equalled that of the medium. The larger molecules of 125I-PLG and 125I-ALB were more slowly released and did not reach equilibrium with the perfusion medium over the period studied. Release of 125I-ALB was intermediate between that of 3H-H2O and 125I-PLG. The greater retention of 125I-PLG by the thrombi was consistent with the high binding affinity of plasminogen for fibrin. The demonstrated movement of these radioisotopes between medium and thrombus suggests that thrombi exist in blood in a dynamic state of flux, exhibiting a fluid exchange of molecules between the interstitial compartment of the thrombus and blood.lld:pubmed
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pubmed-article:6500385pubmed:authorpubmed-author:ChandlerA BABlld:pubmed
pubmed-article:6500385pubmed:authorpubmed-author:StellaS RSRlld:pubmed
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pubmed-article:6500385pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:6500385pubmed:articleTitleMolecular exchange between blood and in vitro thrombi.lld:pubmed
pubmed-article:6500385pubmed:publicationTypeJournal Articlelld:pubmed
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pubmed-article:6500385pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed