穿心莲提取物抗血小板聚集与释放作用及其机理的研究

本研究对６３例心，脑血管疾病患者进行了服药后３ｈ及（或）１周的临床观察，发现穿心莲（ＡＰＮ）对１及５ｍｉｎ血小板聚集率均有明显抑制作用（Ｐ＜０．００１），且随用药时间延长（１周后）疗效更显著。通过２０名志愿者服药前后血浆及血小板５－叛色（５－ＨＴ）测定证明ＡＰＮ能显著抑制血小板释放５－ＨＴ（Ｐ＜０．０１）。透射电镜观察到无论体外加药还是服药后ＡＰＮ均能明显抑制ＡＤＰ诱聚所致的血小板管导系统扩张及颗     

穿心莲对血栓性心肌梗塞的作用研究

通过对大鼠血栓形成和血小板聚集的实验观察，发现穿心莲提取物对血栓动脉形成及ADP诱导的血小板聚集有明显的抑制作用。     

天麻素对家兔体外血小板聚集的影响

目的：研究天麻素对ADP、AA、PAF体外诱导家免血小板聚集的影响。方法：比浊法测定血小板的聚集率。结果：与对照组比天麻素在0.034mmol／L、0.34mmol／L和3．4mmol／L三种浓度下对ADP、AA、PAF三种诱导剂诱导的血小板聚集的聚集率的差异均无显著性意义。结论：天麻素体外无抗血小板聚集作用。     

补阳还五汤注射液对PAF诱导的家兔血小板聚集功能的影响

观察补阳还五汤注射液体外给药对血小板活化因子诱导的家兔血小板聚集功能的影响。方法应用体外血小板聚集功能测定法;结果补阳还五汤注射液体外给药可明显抑制家兔洗涤血小板和未洗涤血小板的聚集功能,对洗涤血小板聚集功能的抑制作用强于未洗涤血小板,且有一定的量效关系。     

紫苏对血小板聚集功能的影响

紫苏水提液100mg/ml在体外可抑制ADP和胶元诱导的血小板聚集,肌注于家兔也能明显抑制ADP所致血小板聚集,对PT、TT及KPTT无明显影响。     

心脑宁提取液体外抗血小板聚集临床研究

对４１例健康人组和１３１例缺血性心脑血管疾病，糖尿病合并血管病变患者分别采用ＡＤＰ诱聚试验，结果证实了血小板聚集率升高可导致血栓形成。并采用经验方以及了宁提取液及潘生丁注射液，蝮蛇抗栓酶对２３３例血栓性疾病患者分组进行实验室体外血小板解聚研究。结果提示３药均有抗血小板聚集作用，但心脑宁提取液体外抗血小板聚集作用优于蝮蛇抗栓酶，而逊于潘生丁注射液。     

白灵片抗血栓作用研究

白灵片显著抑制ADP诱发的家兔体外、体内血小板聚集，对抗家兔体外血栓形成，显著降低家兔全血粘度。     

川芎口服液对兔血小板聚集的作用

用比浊法测得川芎口服液对胶原、花生四烯酸（ＡＡ）、ＡＤＰ诱导的兔体外血小板聚集抑制作用ＩＣ５０值分别为１４．４ｇ／Ｌ、２１．１ｇ／Ｌ、１９．８ｇ／Ｌ。     

鬼针草肠溶胶囊对体外血小板聚集的影响

目的实验观察鬼针草肠溶胶囊对体外血小析聚集的影响。方法以比浊法观察鬼针草肠溶胶囊对家兔体外血小板聚集的影响。结果鬼针草肠溶胶囊0.13 g生药/m l可明显抑制ADP诱导的家兔体外血小板聚集,未观察到鬼针草肠溶胶囊0.063,0.025,0.005 g生药/m l对ADP诱导的家兔体外血小板聚集有明显的抑制作用。结论鬼针草肠溶胶囊只有在高浓度下有明显的抗血小板聚集的作用。     

银杏叶提取物对兔血小板聚集的影响

目的　探讨银杏叶提取物 (GBE)对兔血小板聚集作用的影响。方法　进行体内、体外实验观察银杏叶提取物 (GBE)对由花生四烯酸 (AA)、二磷酸腺苷 (ADP)及血小板活化因子 (PAF)诱导的兔血小板聚集作用的影响 ,并对其作用的特点进行了初步分析。结果　GBE体外选择性地抑制PAF诱导兔血小板聚集 (比浊法 )及 5 HT的释放 (荧光法 ) ,其抗血小板聚集和 5 HT释放的IC50 分别为 (4 7.5± 9.5 )mg·L-1和 (176 .3± 2 5 .5 )mg·L-1;银杏苦内酯B(BN5 2 0 2 1)体外抗聚集的IC50 为 (5 .5 6×10 -3 ± 1.0 1× 10 -3 )mg·L-1。体内试验GBE也选择性地抑制PAF诱导的兔血小板聚集 :静注GBE 5 0 ,10 0mg·kg-1的作用时间分别可持续 6 0 ,2 40min以上 ;灌胃 10 0 ,2 0 0mg·kg-1的作用持续时间分别可达 180 ,2 40min以上 ;静注和灌胃作用高峰时最大抑制率分别为 (96 .5± 6 .1) %,(83.3± 17.2 ) %。结论　GBE对由PAF ,ADP诱导的体内、体外兔血小板聚集有抑制作用 ,但对由AA诱导的聚集无影响。可见GBE是一种有效的、选择性较高的抗血小板聚集药物。     

黄芪提取成份对癌症患者淋巴细胞免疫功能恢复及对大鼠免疫抑制逆转的作用

通过异种移植物抗宿主反应(XGVHR)的动物模型筛选出黄芪促免疫的有效成份 F3。该成份在体外 XGVHR 试验中显示对癌症患者淋巴细胞功能有完全性免疫恢复作用(反应结节从57.80±16.44mm~3到148.95±40.84mm~3),在体内动物模型试验中可显示出全部逆转因环磷酰胺而造成的免疫抑制现象,提示黄芪成份在免疫治疗中可能是一个很有希望的生物反应调节剂。     

病毒促成出血型胰腺炎的发生及大黄的防治作用

本研究将麻疹活疫苗注入家兔主胰管及耳缘静脉,14及48小时血清淀粉酶明显升高,血小板聚集率显著增强,与两个对照组相比均有显著差异(P<0.05～0.01)。胰腺可见明显瘀血及点片状出血。大黄治疗组24及48小时血清淀粉酶及血小板聚集升高均受到阻抑,胰腺瘀血、出血亦减轻。结果提示病毒对胰腺的侵袭是发生出血型胰腺炎的因素之一;大黄是治疗出血型胰腺炎的有效药物。     

钩吻素子对兔血小板聚集的影响

钩吻素子在体外实验中，对由花生四烯酸（ＡＡ）、凝血酶（Ｔｈｒ）、Ｃａ２＋诱导的兔血小板聚集抑制作用的ＩＣ５０分别为０．４５ｇ／Ｌ、０．２２ｇ／Ｌ、０．００１５ｇ／Ｌ，并在一定浓度范围内呈剂量依赖关系。钩吻素子在静注后不同时间内，其抑制血小板聚集作用呈现良好曲线变化，以ＡＡ、Ｔｈｒ为诱导剂，其最大抑制作用的时间分别为静注后５６ｍｉｎ、７８ｍｉｎ处     

Antiplatelet and antithrombotic activities of methanol extract of Usnea longissima

The antiplatelet and antithrombotic activities of a methanol extract of a medicinal lichen, Usnea longissima, were investigated on platelet aggregation in vitro and on pulmonary thrombosis in vivo. The extract showed concentration dependent inhibitory effects on ADP-induced platelet aggregation, with an IC50 value of 3.6 mg/mL. Using an in vivo mouse thrombotic model in which mice were challenged with an intravenous injection of collagen and epinephrine mixture, oral administration of the extract prior to the injection produced a significant inhibition of thrombotic death or paralysis at 100-200 mg/kg body weight. Aspirin, a representative antiplatelet drug, produced a significant inhibition of thrombotic death at 10-20 mg/kg body weight. The mouse tail bleeding time was significantly prolonged by the addition of the extract. On the other hand, the extract did not show any fibrinolytic activity or alter the coagulation parameters such as activated partial thromboplastin time (APTT), prothrombin time (PT) and thrombin time (TT) in rat platelets in vitro. These results suggested that the antithrombotic activity of U. longissima extract might be due to antiplatelet activity rather than anticoagulant activity.     

参芪注射液对血小板环核普酸含量及磷酸二酯酶活性的影响

本文用放免法测定了一次静脉给药参芪液60ml 前后对冠心病心气虚或心阴虚患者血小板环核苷酸含量的变化。结果表明用药后一小时,血小板内 cAMP 含量由20.89±3.7增至30.0±3.0pm/10~9血小板(P<0.02),cGMP 含量由3.33±1.0增至5.4±1.2pm/10~9血小板(P<0.05)。心阴虚者用药后环核苷酸含量有下降趋势。用参芪后血小板环核苷酸含量增加可能为参芪抑制血小板聚集的机理之一。环核苷酸含量增加与参芪抑制磷酸二酯酶活性有关。     

孕康口服液保胎作用的实验研究

孕康口服液对针刺和缩宫素所致的大鼠和小鼠实验性流产模型有明显的保胎作用，其疗效与黄体酮无差异；对大鼠，小鼠的离体子宫和家兔在体子宫平滑肌均有明显的松驰作用，并能损坏抗缩宫素和乙酰胆碱收缩动物离体和在体子宫平滑肌的作用，毒性试验结果：小鼠和大鼠灌胃的最大耐受量分别大于２４０ｇ／ｋｇ和９６ｇ／ｋｇ，小鼠腹腔注射的ＬＤ５０＝６１．５６±５．２９ｇ／ｋｇ（Ｐ＝０．９５）；大鼠长期毒性试验未见明显毒性；致突     

当归多糖对凝血和血小板聚集的影响

目的:探讨当归多糖(AP)对凝血和血小板聚集的影响。方法:红外比浊法测定血小板聚集率、凝血酶原时间(PT)、凝血酶时间(TT)、活化部分凝血活酶时间(APTT);断尾法测出血时间;玻片法测凝血时间。结果:当归多糖能显著延长凝血时间、缩短出血时间;显著延长TF和APTT,而对PT影响较小;显著升高5分血小板聚集率。结论:当归多糖有较强的抗凝血和止血作用,其止血作用与其促进血小板聚集作用有关。     

Methanol extract of the oyster mushroom, Pleurotus florida, inhibits inflammation and platelet aggregation

The antiinflammatory and platelet aggregation inhibiting activities of the methanol extract of Pleurotus florida Eger, an edible and commercially grown mushroom, were investigated. The extract showed significant activity in ameliorating acute inflammation induced by carrageenan and chronic inflammation by formalin at 500 and 1000 mg/kg body weight. The effect was comparable to the standard reference drug, diclofenac. The extract also showed significant platelet aggregation inhibiting activity of washed human platelets. Adenosine 5'-diphosphate (ADP) induced platelet aggregation was inhibited by 88% to 95% at a concentration of 500 microg/mL of the extract after a preincubation time of 5, 10 and 20 min. The marked antiinflammatory and platelet aggregation inhibiting properties of this mushroom suggest its potential therapeutic use against vascular disorders.     

狭序唐松草中三类生物碱对血小板聚集的影响

目的：研究狭序唐松草中三类生物碱ＢＢＩ、ＡＢＩ、ＡＰ的抗血小板聚集作用。方法：采用比浊法进行体外抗血小板聚集研究。结果：ＢＢＩ类和ＡＢＩ类能够抑制ＡＤＰ、Ｃｏｌｌ诱导的大鼠血小板聚集,ＡＰ类与正常对照相比则无显著差异。结论：ＢＢＩ类和ＡＢＩ类具有抗血小板聚集作用。且ＢＢＩ类作用强于ＡＢＩ类,ＡＰ类则几乎无作用。     

Inhibition of rat platelet aggregation by Urtica dioica leaves extracts

Platelet hyperactivity plays an important role in arterial thrombosis and atherosclerosis. The present study was undertaken to investigate the effects of different extracts of Urtica dioica leaves on platelet aggregation. Rat platelets were prepared and incubated in vitro with different concentrations of the tested extracts and aggregation was induced by different agonists including thrombin (0.5 U/mL), ADP (10 microm), epinephrine (100 microm) and collagen (5 mg/mL). The crude aqueous extract inhibited thrombin-induced platelet aggregation in a dose-dependent manner. At 1 mg/mL, the percent inhibition was 17.1 +/- 4.2%. Soxhlet extraction of the plant leaves with different successive solvents showed that the ethyl acetate extract exhibited the most antiaggregant effect with an inhibition of 76.8 +/- 6.1% at 1 mg/mL. Flavonoids isolated from the plant leaves, produced a strong inhibitory effect on thrombin-induced platelet aggregation with an IC(50) of 0.25 +/- 0.05 and 0.40 +/- 0.04 mg/mL for genins and heterosidic flavonoids, respectively. Flavonoids also markedly inhibited platelet aggregation induced by ADP, collagen and epinephrine. It is concluded that Urtica dioica has an antiplatelet action in which flavonoids are mainly implicated. These results support the traditional use of Urtica dioica in the treatment and/or prevention of cardiovascular disease.