線維素溶解酵素系の基礎的ならびに臨床的研究 : 第2報血液,組織,尿中の線維素溶解酵素系について

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The active component and its activity on the fibrinolytic enzyme system in blood, tissue, urine and its extracts was analysed. According to the results of the first report, the fibrin plate (St.-plate) composed of 100 mg/dl fibrin solution, 100 u./ml thrombin solution, pH 7.3 phosphate buffer (μ= 0.15), and fibrin membrane of 1.3 mm in thickness, was used. Furthermore, the heat-treated plate (H.-plate), which is the standard plate treated at 85℃ for 30 minutes, was also used in comparison. The incubation time was 18 hours at 37℃ in both cases. 1. Blood The streptokinase-plasmin activity (SK-pl. activity) in serum and citrated plasma (plasma) was 413 mm^2 in the former and 486 mm^2 in the latter with St.-plate, and it was 291 and 353 with H.-plate, respectively. While the antiplasmic activity was 1410 mm^2 in the former and 1404 mm^2 in the latter. Namely, the serum had shown rather higher antiplasmic activity compared with the plasma. The change of SK-pl. activity in plasma during the storage at different temperature was examined. It was reduced by time at any temperature during storage, but the reducing rate was rather lower in the preparation kept at lower temperature. Especially, the samples kept in ice-box showed only minimal decrease of its activity as from 253 mm^2 to 251 mm^2 during the first 24 hours. Next, the fibrinolytic activity of euglobulin fraction and globulin fraction of the plasma was compared. First, not any plasmin activity could be found on both of them, but SK-pl. activity was 641 mm^2 and 580 mm^2 on St.-plate and 390 mm^2 and 367 mm^2 on H.-plate, respectively. Namely, it revealed rather a higher activity of fibrionlytic action in the euglobulin fraction of the plasma. (The SK-pl. activity of the whole plasma was 504 mm^2 on St.-plate and 306 mm^2 on H.-plate.) The reason why the fibrinolytic activity of euglobulin fraction of the plasma was rather more dominant than that of whole plasma is: the antiplasmic activity was 1006 mm^2 of the whole plasma compared with 614 mm^2 of the euglobulin fraction, and about 40% of antiplasmic activity of whole plasma was assumed to be eliminated out in the euglobulin fraction. The value of fibrinolytic activity in blood obtained from 17-49 aged healthy men and women (with 95% confidence interval) was: with St.-plate, 0 mm^2 in plasma, 387-489 mm^2 in SK-plasma, 0-46 mm^2 in euglobulin fraction, and 496-646 mm^2 in SK-euglobulin fraction; with H.-plate, 0 mm^2 in plasma, 242-302 mm^2 in SK-plasma, 0-16 mm^2 in euglobulin fraction, and 392-398 mm^2 in SK-euglobulin fraction, respectively. The antiplasmic activity of plasma was 673-769 mm^2. 2. Tissue The amount of plasminogen activator in the tissue homogenate and its extract obtained by Astrup-Albrechtsen's method was compared. A rather higher value could be found in the latter. 3. Urine The amount of plasminogen activator was compared on each portion of fresh urine, 50% alcohol extract, aceton extract, and KSCN extract of the urine with St.-plate. The activity of them were 455, 195, 72, and 64 mm^2 respectively, and the most high activity of urokinase was found in the fresh urine. However, in the cases of proteinuria, the urokinase activity was rather higher in the extract compared with the one from no protein containing urine. Furthermore, the activity of urokinase was quickly reduced even in the preparation kept in ice-box.
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線維素溶解酵素系の基礎的ならびに臨床的研究 : 第2報血液,組織,尿中の線維素溶解酵素系について

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線維素溶解酵素系の基礎的ならびに臨床的研究 : 第2報 血液,組織,尿中の線維素溶解酵素系について

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線維素溶解酵素系の基礎的ならびに臨床的研究 : 第2報血液,組織,尿中の線維素溶解酵素系について