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- W278766787 abstract "Abstract The effect of inhibition of factor XIIIa with 2-(l-acetonylthio)-5- methylthiazolo[2,3-b]1,3,4-thiadiazo lium perchlorate (L-722,151) on coronary thrombolysis and reocclusion was studied in an acute dog model of electrically induced coronary thrombosis. L-722,151 (0.1 mg/kg/min intravenously [IV] or placebo was administered 15 minutes before current initiation (150 microA) and for the duration of the experiment (270 minutes). Fifteen minutes after thrombus formation, heparin (300 U/kg, IV) was administered, followed 45 minutes later by recombinant tissue-type plasminogen activator (tPA) (10 micrograms/kg/min, IV for 90 minutes). Placebo-treated animals thrombosed at 48.9 +/- 8.1 minutes (mean +/- SEM) and reperfused in response to tPA at 49.1 +/- 9.3 minutes. L-722,151 pretreated animals thrombosed at 44.4 +/- 9.7 minutes and reperfused in response to tPA at 16.4 +/- 2.8 minutes (P less than .05 v vehicle). Furthermore, residual thrombus mass was reduced by L-722,151 from 6.9 +/- 1.9 mg in placebo-treated animals to 1.7 +/- 0.6 mg (P less than .05 v vehicle). Acute reocclusion occurred in 86% of placebo and in 75% of L-722,151-treated animals. The incidence of tPA-induced reperfusion in L-722,151-treated dogs was 100% (8 of 8), whereas only 70% (7 of 10) of placebo-treated dogs reperfused. These results demonstrate that pretreatment with L-722,151 hastens reperfusion time threefold and reduces residual thrombus mass. These effects occurred with no change in systemic blood pressure in response to L-722,151. When L-722,151 was administered 15 minutes after thrombus formation in a separate group of dogs (n = 5), no beneficial effect on thrombolysis time or thrombus mass was observed. Thus, the specific factor XIIIa catalyzed crosslinking reaction(s), which may determine(s) resistance to plasmin-mediated fibrin degradation, occur(s) rapidly. Inhibition of this crosslinking by pretreatment with L-722,151 promotes tPA-induced thrombolysis." @default.
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- W278766787 date "1990-04-01" @default.
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- W278766787 title "Inhibition of factor XIIIa in a canine model of coronary thrombosis: effect on reperfusion and acute reocclusion after recombinant tissue- type plasminogen activator" @default.
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- W278766787 doi "https://doi.org/10.1182/blood.v75.7.1455.1455" @default.
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