著者

松田 保 小河原 緑 三浦 玲子 関 俊子 横内 正利

出版者

一般社団法人 日本血栓止血学会

雑誌

血液と脈管 (ISSN:03869717)

巻号頁・発行日

vol.12, no.1, pp.13-15, 1981

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Viscosity of blood at 37&deg;C and 25&deg;C was compared in various blood samples using coaxial cylinder viscometer which operates on the couette principle. Ratios of blood viscosity measured at 25&deg;C to one at 37&deg;C at shear rate of 0.39sec^-1 were significantly correlated with fibrinogen content of blood (n=49, r=+0.62, p<0.001). However, there was no significant correlation between ratios of blood viscosity at body temperature to one at the lower temperature and hematocrit values (n=49, r=-0.22, n. s.). To confirm important role of fibrinogen in elevation of blood viscosity when temperature falls, following experiment was carried out. Red blood cell suspentions with various amount of fibrinogen were prepared from combinations of packed red cells, bentonite adsorbed plasma, which contains no fibrinogen, normal plasma and human fibrinogen solution. Elevation of viscosity at 25&deg;C was more pronounced when amount of fibrinogen in the suspension increased.<br>Significance of elevated viscosity of blood with increased fibrinogen content at low temperature in development of Raynaud's phenomenon was discussed.

著者

村上 元孝 松田 保 万見 新太郎 平丸 三樹 大江 国広

出版者

一般社団法人 日本血栓止血学会

雑誌

血液と脈管 (ISSN:03869717)

巻号頁・発行日

vol.1, no.6, pp.857-864, 1970

著者

村上 元孝 松田 保 万見 新太郎 平丸 三樹

出版者

一般社団法人 日本血栓止血学会

雑誌

血液と脈管 (ISSN:03869717)

巻号頁・発行日

vol.2, no.3, pp.411-417, 1971

著者

八木 高秀 小橋 紀之 香取 瞭

出版者

The Japanese Society on Thrombosis and Hemostasis

雑誌

血液と脈管 (ISSN:03869717)

巻号頁・発行日

vol.18, no.3, pp.250-253, 1987-06-01 (Released:2010-08-05)

参考文献数

8

被引用文献数

1

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The purpose of the present study is to clarify the inhibitory mechanism of taurine on platelet aggregation in myocardial infarction. In vitro, platelet aggregations induced by 4.6μM ADP and calcium ionophore in the dose range of 1.7 to 10.0μM A23187 were measured by Born's method with and without 10mM taurine in normal subjects and in cases with old myocardial infarction. Platelet malondialdehyde formation induced by 125μM arachidonic acid was measured by TBA method. In order to estimate the effect of taurine on the change of cytoplasmic Ca2+ in platelet activated by 0.4U/ml thrombin, the intensity of quin 2 fluorescence was measured by Rink's method with and without 10mM taurine.Platelet aggregations induced by 4.6μM ADP and by 2.5 and 5.0μM 23187 were significantly inhibited with 10mM taurine in cases with old myocardial infarction, and also the increase of cytoplasmic Ca2+ in platelet activated by thrombin was significant. In normal subjects, on the other hand, taurine did not inhibit them. In both of cases with old myocardial infarction and normal subjects, platelet malondialdehyde formation was not significantly affected by incubation with 10mM taurine. These results suggest that the inhibitory mechanism of taurine on platelet aggregation is not due to the effect of taurine on arachidonic metabolism, but the inhibition of cytoplasmic Ca2+ change in platelets of the cases with old myocardial infarction.

著者

福田 雅俊

出版者

The Japanese Society on Thrombosis and Hemostasis

雑誌

血液と脈管 (ISSN:03869717)

巻号頁・発行日

vol.6, no.7, pp.557-562, 1975-07-25 (Released:2010-08-05)

参考文献数

8

著者

吉原 博幸 美原 恒

出版者

The Japanese Society on Thrombosis and Hemostasis

雑誌

血液と脈管 (ISSN:03869717)

巻号頁・発行日

vol.15, no.2, pp.163-166, 1984-04-01 (Released:2010-08-05)

参考文献数

5

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The plasma coagulation system was converted to a mathematical model which was described using differential equations. The calculated output patterns of the mathematical model against various input stimulations were compared with results of in vitro assay.The simulated results of (1) Hemophilia A, (2) anticoagulation effect of antithrombin III and (3) anticoagulation effect of heparin corresponded to the results of in vitro assay and clinical reports. However, the simulated result of (4) anticoagulation effect of synthesized arginine derivative No. 805 (MD-805) did not correspond to the results of in vitro assay. Therefore, a new series simulation of MD-805 was done, supposing that MD-805 had an inhibitory activity not only on coagulation factor ha but also VIIa. The new simulation pattern closely resembled the results of in vitro assay. From these facts, it was theoretically indicated that MD-805 also has an inhibitory activity on VIIa.

著者

伊藤 福美 浅井 史敏 木村 努 深見 征治 小林 晋作

出版者

The Japanese Society on Thrombosis and Hemostasis

雑誌

血液と脈管 (ISSN:03869717)

巻号頁・発行日

vol.16, no.2, pp.175-178, 1985-04-01 (Released:2010-08-05)

参考文献数

8

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CS-570, a chemically stable prostacyclin derivative, inhibited decrease of platelet counts and fibrinogen level, increase of FDP, prolongation of prothrombin time and activated partial thromboplastin time and deposition of fibrin in the renal glomeruli dose-dependently in the endotoxin-induced DIC model of rats. Ticlopidine, dazoxiben (thromboxane synthetase inhibitor) and BM 13177 (thromboxane antagonist) also showed inhibition of changes in these parameters. CS-570, a potent platelet stabilizer and vasodilator, would probably have inhibited thrombocytopenia and coagulation disorders by physiological antagonism against TxA2 produced by endotoxin. This would suggest beneficial effects of CS-570 in endotoxin-induced DIC in humans.

著者

本田 喬 青崎 正彦 田中 徹 内田 達郎 堀川 良史 石塚 尚子 内山 通子 大木 勝義 田中 直秀 上塚 芳郎 岩出 和徳 金子 昇 木全 心一 関口 守衛 広沢 弘七郎

出版者

The Japanese Society on Thrombosis and Hemostasis

雑誌

血液と脈管 (ISSN:03869717)

巻号頁・発行日

vol.18, no.6, pp.609-614, 1987-12-01 (Released:2010-08-05)

参考文献数

7

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We administered tissue-type plasminogen activator (t-PA) intravenously to 10 patients with acute myocardial infarction (AMI) within 6 hours after onset of symptoms, and then examined the state of reperfusion by coronary arteriography (CAG) and observed changes in blood coagulation and fibrinolytic activity to evaluate their effects. AK-124 (by Asahi Chemical Industry and Kowa Co., Ltd. in collaboration), a t-PA produced by tissue culture of normal human lung cells, was given in dosage of 48, 000-576, 000 A. K. units by intravenous infusion over 30-45 minutes. In 7 patients who received t-PA reflow or improved flow was detected on CAG. In t-PA treated patients, euglobulin lysis activity clearly increased, euglobulin lysis time clearly shortened, and D-dimer increased. Levels of circulating fibrinogen and α2-plasmin inhibitor decreased after treatment with t-PA by an average of 12%, 14% of baseline values respectively, but plasminogen showed no detectable change. A hematoma at the site of the catheter insertion was observed in one patient. These observations suggest that t-PA has a higher specificity for fibrin bound plasminogen than for plasminogen and prduces coronary thrombolysis without causing systemic fibrinolysis at least with the present dosage.

著者

小野 百合 三沢 和史 工藤 守 岡崎 裕子 天日 和子 中川 昌一 近藤 光

出版者

The Japanese Society on Thrombosis and Hemostasis

雑誌

血液と脈管 (ISSN:03869717)

巻号頁・発行日

vol.18, no.4, pp.343-346, 1987

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The prevention of diabetic microangiopathy, especially retinopathy, is the last goal of treatment of diabetic patients. Retinopathy is found to progress following rapid control of blood glucose or surgical treatment. To investigate the deterioration of retinopathy, the changes of platelet aggregation induced by ADP, collagen, PAF and epinephrine, of the arachidonate cascade (TXB₂ and 6-keto PGF_1α), and of blood viscosity were measured during and after surgical treatment or after rapid control of blood glucose. Blood was obtained from 22 diabetics with rapid control of blood glucose and from 11 diabetics undergoing surgical treatment.<br>Platelet aggregation induced by all aggregators was increased after rapid control of blood glucose and after surgical treatment, but decreased during operation. When platelet aggregation before surgical treatment was exaggerated, retinopathy tended to be worsened after surgical treatment. Concerning the arachidonate cascade, both TXB₂ and 6-keto PGF_1α were increased and the TX/6-keto PGF_1α ratio was decreased during operation.