巴曲酶治疗脑梗塞的疗效观察

目的探讨巴曲酶治疗急性缺血性脑血管疾病的抗凝溶栓疗效。方法本文对52例急性脑梗塞病人进行随机、双盲分组用药 ,观察各组用药前后血液流变学的变化、t-PA释放、PAI的活性。结果对照组只有全血低切粘度有显著差异 ;治疗组全血低切粘度和纤维蛋白原 (Fg)有极显著差异 ,血浆粘度有显著差异。纤溶酶原激活物 (t-PA)第1d有显著差异 ,第5d有极显著差异。血浆纤溶酶原激活物抑制物 (PAI)的活性 ,两组都无显著差异。结论巴曲酶 (东菱克栓酶 )治疗急性脑梗塞患者疗效显著 ,血液流变学检测 ,t-PA的检查为急性脑梗塞的诊断和疗效观察提供了科学依据。     

纤溶酶原激活剂抑制物(PAI)研究新进展

纤溶酶原激活剂(plasminogen activator,PA)激活纤溶酶原生成纤溶酶是纤溶过程的中心环节。纤溶酶原激活剂抑制物(plasminogen activator inhibitor,PAI)特异性地抑制PA(t-PA及u-PA)活性,其作用迅速,又称为快速作用抑制物。PAI在体内分布很广,对纤溶活性起着决定性作用,某些栓塞病患者血浆PAI活性显著升高,因此     

胺碘酮、美托洛尔对家兔急性心肌梗死血小板活化、纤溶活性、内皮血管活性物质的影响

目的 :探讨胺碘酮、美托洛尔对兔急性心肌梗死 (AMI)血小板活化、纤溶活性、内皮血管活性物质的影响。方法 :新西兰家兔 5 0只 ,随机分为 5组 ,每组 10只。Ⅰ组 :假手术组 ,Ⅱ组 :AMI组 ,Ⅲ组 :AMI+利多卡因组 ,Ⅳ组 :AMI+胺碘酮组 ,Ⅴ组 :AMI+美托洛尔组 ;Ⅱ、Ⅲ、Ⅳ、Ⅴ组分别结扎冠状动脉左室支中点后 ,4h取血分别测定血栓素B2 (TXB2 )、6 -酮 -前列腺素F1α( 6 -Keto-PGF1α)、内皮素 (ET)、一氧化氮 (NO)和组织型纤溶酶原激活剂 (t-PA)、纤溶酶原激活剂抑制物 (PAI)水平 ;摘取心脏 ,测定心肌梗死范围。结果 :Ⅱ、Ⅲ、Ⅳ、Ⅴ组血浆TXB2 、ET、NO浓度和PAI活性显著高于Ⅰ组 (P <0 0 1) ,6 -Keto-PGF1α浓度和t-PA活性显著低于Ⅰ组 (P <0 0 1) ,Ⅱ、Ⅲ、Ⅳ组之间比较 ,血浆TXB2 、6 -Keto-PGF1α浓度、t-PA活性及心肌梗塞范围无显著差异 (P >0 0 5 ) ,Ⅳ组血浆ET、NO浓度和PAI水平明显低于Ⅱ组 (P <0 0 1) ,Ⅴ组血浆TXB2 、ET、NO浓度和PAI水平明显低于Ⅱ组 (P <0 0 1) ,6 -Keto -PGF1α浓度、t-PA活性显著高于Ⅱ组 (P <0 0 1) ,心肌梗塞范围小于Ⅱ组 (P <0 0 1)。结论 :胺碘酮抑制AMI早期PAI活性 ,减少ET和NO的释放 ;美托洛尔抑制AMI早期血小板活化 ,改善纤溶活性 ,减少ET和NO的再释放 ,缩小     

脑梗塞患者甘油三脂与纤溶活性异常的研究

目的 :探讨脑梗塞患者血高甘油三酯与纤溶系统异常的危险因素。方法 :采用酶联免疫吸附双抗体夹心法、酶法 ,对 5 1例脑梗塞患者及 5 0例健康对照组血组织型纤溶酶原激活物 (t PA) ,纤溶酶原激活物抑制物 1(PAI 1)和甘油三酯 (TG)水平进行了对比分析。结果 :血高TG、高PAI 1,与低t PA含量变化为脑梗塞患者异常变化特征 ,与正常组相比有显著性差异 (P <0 .0 1)。结论 :高甘油三酯通过改变纤溶活性是诱发脑梗塞疾病发生、发展的危险生物学因素     

纤溶酶原激活物抑制剂-1与肥胖

纤 溶系统由纤溶酶原、纤溶酶原激活物 ( plasminogenac tivatorPA)和激活物特异性抑制剂 (plasminogenacti vatorinhibitorPAI)、纤溶酶及纤溶酶抑制物组成 ,其主要功能是通过纤溶酶溶解纤维蛋白而将其从循环系统中清除出去。PAI是纤溶系统活性主要的生理调节物 ,它在体内有多种形式 ,包括内皮细胞型 (PAI 1)、胎盘型 (PAI 2 )、尿型 (PAI 3)和连接蛋白酶 1(proteasenexin 1) ,其中PAI 1在纤溶活性调节中起着重要作用 ,它主要灭活组织型纤溶酶原激活物 (t PA)。PAI 1和t PA之间的平衡对维持纤溶系统正常功能十分重要。临床和流…     

卡托普利和地尔硫卓对犬急性心肌缺血溶栓治疗的影响

目的观察卡托普利和地尔硫卓对犬急性心肌梗死溶栓再灌注心肌损伤和纤溶凝血系统的影响。方法建立犬急性心肌缺血溶栓治疗的模型,溶栓同时应用卡托普利和地尔硫卓药物干预,测定治疗过程中组织型纤溶酶原激活物(t-PA)、组织型纤溶酶原抑制物(PAI)、血栓素(TXB2)、前列环素(6-酮-PGF1a)的含量和心肌酶谱等的动态变化。结果溶栓加用卡托普利治疗后,心肌损伤进一步减轻。溶栓后期t-PA活性无明显下降,PAI活性进一步减低,血浆TXB2均值降低,PGI2均值上升。溶栓加用地尔硫卓:血浆TXB2均值降低,PGI2均值上升。结论溶栓治疗时应用卡托普利可使再灌注心肌损伤进一步减轻,心肌梗死面积和范围减小;可以进一步改善纤溶-凝血功能障碍,升高t-PA和PGI2,降低PAI和TXB2,防治血栓形成对心肌缺血的进一步损害。地尔硫卓可以调节再灌注后PGI2/TXB2失衡,升高PGI2,降低TXB2,减轻血管痉挛和血栓形成,改善心肌缺血。     

凝血纤溶异常与早期糖尿病肾病的关系

目的:分析凝血纤溶异常在糖尿病肾病(DN)发生、发展中的作用,为早期诊断DN提供检测指标。方法:将90例2型糖尿病(DM)病人分为:无并发症组、正常白蛋白尿组(DMa组)、微量白蛋白尿组(DMb组)和临床蛋白尿组(DMc组)。测定其抗凝血酶-Ⅲ(AT-Ⅲ)、蛋白C(PC)、凝血酶-抗凝血酶复合物(TAT)、组织型纤溶酶原激活物(t-PA)、纤溶酶原激活抑制物(PAI)等指标水平。结果:①无并发症组PAI、TAT、PC水平升高,AT-Ⅲ、t-PA活性降低,并随UAE增加而加重。②TAT、AT-Ⅲ水平在DMa、DMb、DMc组与无并发症组间,呈显著性差异(P<0.01),且DMc组TAT水平依次高于DMb组、DMa组(P<0.01);AT-Ⅲ水平DMc组依次低于DMb组、DMa组(P<0.01)。③PC、TAT、PAI与DM病程呈正相关。结论:DN患者早期即存在凝血功能亢进、纤溶活性低下,并随DN的进展而逐渐加重。     

测定胃肠道恶性肿瘤和肺癌组织中u—PA的意义

本文建立了测定微量尿激酶型纤溶酶原激活物(u-PA)抗原的ELISA法,检测35例胃肠道恶性肿瘤如胃、食道、结肠、直肠癌以及肺癌患者的癌组织与癌邻近组织的u-PA含量,结果各种癌组织的u-PA明显增高(P<0.05～0.01)。同时测定组织纤溶酶原激活物(t-PA)抗原,仅胃癌组织有明显增高(P<0.01),纤溶酶原激活物(PA)的活性增高见于胃、结肠和直肠癌组织(P<0.05～0.001)。提示这些恶性肿瘤细胞产生或分泌PA抗原特别是u-PA增多,使局部纤溶活性增强,是促进癌细胞增殖和转移的机制之一。     

脑热清对内毒素性发热家兔解热作用的实验研究

目的：探讨脑热清（NRQ）口服液对内毒素性发热家兔的解热作用。方法:复制大肠杆菌内毒素性发热家兔模型，用数字温度计测量家兔的直肠温度，并采用放免法测定血浆内皮素的含量及血清肿瘤坏死因子（TNFα）的含量，用发色底物法测定血浆组织纤溶酶原激活物（t-PA）和组织纤溶酶原激活物抑制剂（PAI）的活性，同时取肺、肾、肝组织，观察形态改变。结果:①NRQ对内毒素性发热家兔有显著的解热效应（P<0.01）；②NRQ可明显抑制发热家兔内皮素、TNFα的含量上升（P<0.01），同时可降低PAI活性（P<0.01）、提高t-PA的活性（P<0.01）；③光镜显示，NRQ可减轻发热家兔肺、肾、肝血管扩张充血、淤血病理形态的改变 。结论：NRQ可能通过调节发热家兔促凝和抗凝物质的平衡、抑制致热性细胞因子释放达到解热作用。     

脂蛋白的氧化修饰对血凝及纤溶活性的影响

目的:研究脂蛋白的氧化修饰对凝血及纤溶活性的影响。方法:用Cu²⁺法及次氯酸法氧化修饰超速离心分离的正常人血浆极低密度脂蛋白(VLDL)、低密度脂蛋白(LDL)及高密度脂蛋白(HDL)。分别将天然及氧化修饰脂蛋白N-VLDL、Ox-VLDL;N-LDL、Ox-LDL、N-HDL及Ox-HDL加入由正常人新鲜混合血浆构成的反应系统中,以相应天然脂蛋白为对照,测定凝血酶原时间(PT)、活化部分凝血酶原时间(APTT)、组织型纤溶酶原激活物(t-PA)活性、纤溶酶原激活物抑制剂1(PAI-1)活性及血小板最大聚集率。结果:VLDL、LDL及HDL经Cu²⁺法及次氯酸法氧化修饰后其REM、234nm吸光度值、TBARS含量均显著大于对照组(P<0.01)。Ox-VLDL、Ox-LDL及Ox-HDL使PT及APTT明显短于对照组(P<0.05或P<0.01),血小板聚集率明显高于对照组(P<0.01)。Ox-VLDL及Ox-LDL使t-PA活性高于对照组,PAI-1活性低于对照组(P<0.05及P<0.01),而Ox-HDL对t-PA活性及PAI-1活性的影响与对照组无明显差别。结论:N-VLDL、N-LDL及N-HDL对凝血及纤溶活性无影响。Ox-VLDL、Ox-LDL及Ox-HDL促进血凝及血栓形成;Ox-VLDL及Ox-LDL使纤溶活性增加,而Ox-HDL对纤溶活性无明显影响。     

The urokinase plasminogen activator (u-PA) and its inhibitor (PAI-1) in embryo-fetal bone formation in the human: an immunohistochemical study

The role of urokinase plasminogen activator and plasminogen activator inhibitor-1 in human embryofetal bone formation between the 9th and the 20th week of gestation has been studied immunohistochemically. While mature osteocytes of the secondary spongiosa and resting chondrocytes of the bone epiphyses were negative for both antigens in each developmental stage, metabolically active parts of the osseocartilaginous system showed a strong immunoreactivity. Until the end of the 10th week of gestation urokinase plasminogen activator and plasminogen activator inhibitor-1 could not be demonstrated in the shaft of the preexisting cartilaginous models of bones, which correlates with the morphological developmental stage of the embryos. Later, osteoblasts and chondrocytes in the areas of enchondral ossification, and the perivascular chondrocytes of the epiphyseal secondary ossification centres, showed similarly high concentrations of urokinase plasminogen activator and plasminogen activator inhibitor-1. Moreover, the individual ossification stages of the different bones in embryo-fetal development could be demonstrated immunohistochemically. While humeri and femora showed diaphyseal immunoreactivities at an early stage, positive reactions in the phalanges were found only much later. Thus, the enzymes of the fibrinolytic system studied are clearly involved in the desmal and enchondral ossification process in the osseocartilaginous compartment.     

Prognostic relevance of urokinase-type plasminogen activator (uPA) and plasminogen activator inhibitors PAI-1 and PAI-2 in gastric cancer

Expression of urokinase-type plasminogen activator (uPA), plasminogen activator inhibitor-1 (PAI-1) and plasminogen activator inhibitor-2 (PAI-2) was evaluated in 125 surgically resected gastric cancers by immunohistochemical analysis. Tissue was stained immunohistochemically with a monoclonal antibody against human uPA and monoclonal antibodies against human PAI-1 and PAI-2. In addition, DNA ploidy patterns were determined by cytofluorometer after staining with propidium iodide. We found that 82 (66%) of the 125 gastric cancers expressed uPA as diffuse cytoplasmic staining, as intensely outlined luminal borders. PAI-1 expression was observed in 62 (50%) of 125 gastric cancer as a fine, diffuse and granular pattern in the cytoplasm. PAI-2 expression was observed in 65 (52%) of the 125 gastric cancers as a diffuse cytoplasmic staining. uPA-positive tumours showed a higher incidence of infiltration, lymph node metastasis and peritoneal dissemination than uPA-negative ones. Patients with uPA-positive tumours proved to have a significantly poorer prognosis than those with negative ones. PAI-1-negative tumours showed a higher incidence of liver metastasis and carried a poorer prognosis than PAI-1-positive ones. There was no significant correlation between uPA or PAI-1 expression and DNA ploidy patterns. Conversely, there was no significant relationship between PAI-2 expression and clinicopathological parameters and prognosis. According to the expression of uPA and PAI-1 status, groups of 19 uPA(–)/PAI-1(–), 44 uPA(+)/PAI-1(–), 23 uPA(–)/PAI-1(+) and 39 uPA(+)/PAI-1(+) were subdivided. Tumours with UPA(+)/PAI-1(–) had a significantly higher incidence of liver metastasis, lymph node metastasis and serosal invasion than the other groups of tumours. Patients with uPA(+)/PAI-1(–) tumours had a significantly poorer prognosis than those with uPA(–)/PAI-1(+) tumours. These results indicate that uPA expression is a useful biological prognostic indicator, and that uPA and PAI-1 may play an important part in the tumour progression and metastasis in gastric cancer.     

The urokinase-type plasminogen activator and inhibitors in resectable lung adenocarcinoma

BackgroundThe urokinase-type plasminogen activator (uPA) system is closely related to the occurrence and progression of cancer in many aspects. Previous studies demonstrated that the conclusions about the prognosis value of uPA, plasminogen activator inhibitor 1 (PAI-1) and plasminogen activator inhibitor 2 (PAI-2) in lung cancer are controversial, so this study was performed for the exploration of the predictive effect of uPA, PAI-1 and PAI-2 on the overall survival (OS) of resectable pulmonary adenocarcinoma patients.MethodsUPA, PAI-1 and PAI-2 expression levels were assayed by immunohistochemical staining based on tissue microarray (TMA) that is composed of formalin-fixed paraffin-embedded specimens from 84 resectable lung adenocarcinoma patients from July 2004 to June 2009. The relationship of IHC, mRNA expression levels of three molecules were investigated respectively. The three molecules’ relationship with clinicopathologic parameters and OS was explored by Chi-square, Kaplan-Meier, and Cox regression analyses. The Cancer Genome Atlas (TCGA) database was used to analyze differential gene expressions of RNA-sequencing data of pulmonary adenocarcinoma and normal tissues, and Kaplan-Meier methods were adopted to confirm the prognostic value of uPA, PAI-1 and PAI-2 in resectable lung adenocarcinoma in TCGA database and the R package MethylMix was used to conduct an analysis integrating methylation data and gene expression of RNA-sequencing data based on TCGA.ResultsUPA, PAI-1 and PAI-2 had much higher IHC expression levels in tumor than those in the normal tissues (uPA, Z = -10.511; PAI-1, Z = -4.836; PAI-2, Z = -6.794; all P < 0.0001). High DNA methylation level of gene uPA resulted in the decrease of its expression. In addition, expression level of PAI-2 was positively associated with tumor size (χ² = 8.372, P = 0.004). Multivariate analyses showed TNM stage III was an independent adverse prognostic factor (hazard ratio = 3.736, 95 % confidence interval = 1.097–12.72, P = 0.035). Kaplan-Meier method revealed that uPA, PAI-1 and PAI-2 expression levels were not related to the OS for 84 resectable lung adenocarcinoma patients. According to TCGA data, PAI-1 expression level was identified as a potential adverse predictor for prognosis of resectable lung adenocarcinoma (Gehan-Breslow-Wilcoxon test, P = 0.025).ConclusionsOur data show that, the expression levels of uPA, PAI-1 and PAI-2 are significantly up-regulated in resectable lung adenocarcinoma. Besides, this study highlights PAI-1 as a latent adverse prognostic factor in resectable adenocarcinoma of lung.     

纤溶酶原激活剂的放射酶分析

我所对纤溶酶原激活剂（ＰＬＧＡ）的测定建立了一项新方法，纤溶酶原在其激活上生成纤溶酶，该酶能特异地水解包被＾１２５Ｉ－纤维蛋白底物生成可溶性的＾１３５Ｉ－多肽产物。通过测定产物的放射性强度，计算了样口中纤溶酶原激活剂活怀。该方法是具有高度特异性和灵敏度，并且简单快速，可为凝、溶务基础研究和临床血栓病的防治服务。     

PAI-1启动子区4G/5G基因多态性与脑血管病相关性研究

目的初步探讨人类纤溶酶原激活物抑制物-1（plasminogenactivatorinhibitor,PAI-1）启动子区基因多态性与脑血管病的关系及其在脑血管病发病过程中的作用。方法通过多聚酶链反应（polymerasechainreaction,PCR）技术和发色底物法(ELISA),测定96例脑血管病病人,其中脑梗死（cerebralinfarction,CI）组65例,脑出血（cerebralhemorrhage,CH）组31例和60例对照组的白细胞PAI-1启动子区4G/5G多态性位点的基因型及血浆PAI-1活性。结果CI组血浆PAI-1活性明显高于其它二组,各组中均以纯合子4G/4G基因型患者的PAI-1血浆活性水平为最高,5G/5G基因型最低,杂合子4G/5G基因型居中;4G纯合子基因型与其它二型之间比较差异均有显著意义,4G/5G与5G/5G基因型之间比较差异无显著意义。CI组4G/4G纯合子型基因型与对照组（Controls）比较有显著性差异（P<0.05）,CI组基因型与CH组及CH组与对照组基因型比较均无统计学意义（P>0.05）。女性CI4G纯合子基因型患者血浆PAI-1活性与同型男性患者比较有显著性差异。结论纯合子4G/4G基因型可能是CI发病的危险因素之一,4G纯合子个体可能具有较高的CI发病倾向,尤其可能与女性CI发病相关。     

体外培养的血管内皮细胞低氧低糖损伤后tPA、PAI-1表达变化

目的：观察体外培养的血管内皮细胞低氧低糖损伤后组织型纤溶酶原激活剂(tPA)、Ⅰ型纤溶酶原激活物抑制因子(PAI-1)表达变化，探讨脑缺血后纤溶系统的变化及机制。材料和方法：制备体外内皮细胞低氧低糖损伤模型，利用HE染色、免疫细胞化学染色观察tPA、PAI-1表达变化。结果：低氧低糖损伤后，tPA、PAI-1表达均明显增强。结论：成功制备体外内皮细胞低氧低糖损伤模型。内皮细胞低氧低糖损伤可以诱导tPA、PAI-1表达增多，进一步说明脑缺血损伤后tPA、PAI-1表达增加并参与损伤过程。     

Untersuchung zur Frage von persistierenden Veränderungen der Fibrinolyseparameter t-PA und PAI bei Patienten nach juvenilem ischämischen cerebralem Insult

Summary In diseases associated with thrombotic or thromboembolic complications, a reduction in the fibrinolytic potential may contribute to the risk to develop thrombosis.To investigate whether iuvenile cerebral infarction is associated with a permanent defect of the fibrinolytic system we measured the main components of the fibrinolytic system, tissue plasminogen activator (t-PA) and its fast acting inhibitor (PAI) in plasma samples of 21 patients (aged 21–44 years) 3–24 months after the acute event. The data obtained were compared to those from thirteen healthy young volunteers (22–46 years). A direct effect of known risk factors on the fibrinolytic system could be excluded because patients avoided their risk factors immediately after the ischemic cerebral attack. Hypertension and the combination of oral contraceptives and smoking had been the most striking original risk factors.Levels of t-PA antigen and t-PA activity before and after venous occlusion, or PAI activity were not different between patients and controls suggesting that at least a permanent decrease in the activity of the fibrinolytic system does not exist in these patients. However, our findings do not exclude that a temporary defect in fibrinolysis might have contributed to the acute onset of the thrombotic cerebral event possibly induced by the risk factors originally present.

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Abkürzungen t-PA tissue plasminogen activator - PAI plasminogen activator inhibitor - RIND reversibles ischämisches neurologisches Defizit - KS kompletter Schlaganfall - TIA transitorisch ischämische Attacke     

锡类散凝胶对兔输液性静脉炎治疗效果的初步观察

目的探讨锡类散凝胶对兔实验性输液性静脉炎的治疗效果及可能机制。方法将大白兔随机分为对照组、静脉炎组和锡类散治疗组，每组20只。静脉炎组在耳缘静脉注射甘露醇构建实验眭输液性静脉炎动物模型，对照组以生理盐水替代甘露醇，治疗组在造模前经锡类散预处理；在造模后相应的时间点检测兔血浆中TT（凝血酶时间）、PT（凝血酶原时间）、APTT（活化部分凝血酶时间）、PAI-1（I型纤溶酶原激活物抑制因子）和t—PA（组织型纤溶酶原激活剂）含量，并作病理学检查及评分，最后进行统计分析。结果治疗组与静脉炎组相比较（P〈0．05），能明显纠正因甘露醇而造成的高凝状态，有效降低血清t—PA水平及减轻输液静脉损害；而PAI—1含量在三组之间没有统计学差异（P〉0．05）。结论锡类散凝胶能有效改善甘露醇所致的输液胜静脉炎损害，其机制可能通过抑制血清t—PA升高而发挥治疗作用。     

人脑星形细胞瘤纤溶酶原激活抑制因子1基因表达研究

目的研究人脑星形细胞瘤纤溶酶原激活抑制因子１（ＰＡＩ１）基因表达及其临床意义。方法采用Ｎｏｒｔｈｅｒｎ杂交和免疫组化ＡＢＣ方法检测３６例人脑星形细胞瘤ＰＡＩ１ｍＲＮＡ和蛋白表达，分析其与临床病理因素之间的关系。结果所有星形细胞瘤组织均可表达３．０ｋｂ和２．２ｋｂ的ＰＡＩ１ｍＲＮＡ转录物；高分级星形细胞瘤ＰＡＩ１ｍＲＮＡ表达水平显著高于低分级星形细胞瘤（Ｐ＜００１）；正常脑组织未检测出ＰＡＩ１ｍＲＮＡ表达。ＰＡＩ１ｍＲＮＡ表达水平与星形细胞瘤的坏死（ｒ＝０．５１，Ｐ＜０．０１）、微血管数（ｒ＝０．３３，Ｐ＜０．０１）及脑水肿（ｒ＝０．２７，Ｐ＜０．０１）呈显著正相关，与患者性别、年龄及瘤体大小无显著相关性。免疫组化染色显示，ＰＡＩ１蛋白主要分布在高分级星形细胞瘤的瘤细胞和内皮细胞，尤以血管增殖部位和坏死灶周围较为显著，低分级星形细胞瘤呈低水平表达。结论ＰＡＩ１基因表达与人脑星形细胞瘤的分级、坏死、血管生成及脑水肿密切相关，可作为星形细胞瘤恶性程度的分子标记。     

Changes in von Willebrand factor and fibrinolysis following a post-exercise cool-down

The purpose of this study was to determine the effect of a post-exercise active cool-down on von Willebrand factor and fibrinolysis. Ten subjects performed two maximal oxygen uptake (O_2max) tests followed by a 10-min passive (PC) or an active (AC) cool-down. Blood samples were obtained pre-exercise, post-exercise, post-PC/AC, and 1 h post-exercise and analyzed for von Willebrand factor antigen (vWf:Ag), tissue plasminogen activator (tPA) antigen and activity and plasminogen activator inhibitor-1 (PAI-1) activity. Data were analyzed using repeated measures analysis of variance. No significant differences were found between O_2max tests for treadmill time, O_2max, respiratory exchange ratio, maximal heart rate, or maximal blood lactate concentration. vWf:Ag was significantly elevated (P<0.05) following PC [198.4 (18.3)% normal] versus AC [174.5 (15.6)% normal] and remained elevated 1-h post-exercise [179.4 (16.4)% normal for PC vs 158.6 (13.8)% normal for AC]. There were no differences between tests for tPA or PAI-1 activity, although tPA antigen was significantly elevated following PC versus AC (P <0.05). Following the cool-down, hematocrit was higher (P <0.05) for the PC test [48.90 (0.36)] compared with AC [47.43 (0.51)]. An AC reduces post-exercise vWf:Ag and tPA antigen without affecting tPA or PAI-1 activity.