Abstract:
:Transient procoagulant states resulting in failure of recanalization or rethrombosis of the reperfused artery during thrombolytic therapy might be due to an inhibitory effect of plasmin on the anticoagulant properties of protein C. We therefore studied the effect of plasmin on protein C (PC) and activated protein C (APC) using purified human proteins. Incubation of 70 nM purified human PC with 40-400 nM human plasmin resulted in rapid activation and subsequent inactivation of PC as measured by amidolytic and anticoagulant assays. The rates of activation and inactivation were dependent on the concentration of plasmin. Lower concentrations of plasmin resulted in higher peaks of generated APC and more sustained activity, while at higher concentrations, both activation and inactivation were more rapid. Anticoagulant activity appeared more sensitive to inactivation by plasmin than amidolytic activity; e. g., while amidolytic activity reached a maximum of 13.8 nM in 6 min and declined to approximately 6 nM after 30 min, anticoagulant activity reached its maximum of only 1.4 nM within 30 s and completely disappeared within 90 s. Plasmin rapidly destroyed both the anticoagulant and amidolytic activity of purified APC, with second order rate constants of 2.8 x 10(5) M-1 s-1 and 1.2 x 10(4) M-1 s-1, respectively, for 70 nM APC. The rates of activation and subsequent inactivation were slowed by the presence of CaCl2. The second order rate constant of inactivation of APC amidolytic activity decreased to 6.6 x 10(3) M-1 s-1 in the presence of 5 mM CaCl2.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Thromb Haemostjournal_title
Thrombosis and haemostasisauthors
Váradi K,Philapitsch A,Santa T,Schwarz HPsubject
Has Abstractpub_date
1994-05-01 00:00:00pages
615-21issue
5eissn
0340-6245issn
2567-689Xjournal_volume
71pub_type
杂志文章abstract::The clinical impact of in-stent thrombosis is high because it is associated with high mortality and 20 % of the patients suffer a recurrent event within the two following years. The aim of this study was to characterise the morphologic and proteomic profile of in-stent thrombi (IST) in comparison to thrombi developed ...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH17-03-069
更新日期:2017-08-30 00:00:00
abstract::Platelet-leukocyte interactions are recognised to have pro-inflammatory effects, which may be important in the pathophysiology of ischaemic heart disease. Clopidogrel and the novel intravenous antithrombotic agent AR-C69931MX act at the level of the platelet P2Y12 receptor, which is known to amplify platelet activatio...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2002-09-01 00:00:00
abstract::The ability of cellular fibronectin, found in the vessel wall in a fibrillar conformation, to regulate platelet functions and trigger thrombus formation remains largely unknown. In this study, we evaluated how parietal cellular fibronectin can modulate platelet responses under flow conditions. A fibrillar network was ...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH14-11-0958
更新日期:2015-11-25 00:00:00
abstract::Compared to second generation, the use of third generation oral contraceptives has been associated with an increased risk of venous thrombosis especially in women with the factor V Leiden mutation. To find an explanation for these risk differences we investigated the effects of desogestrel- and levonorgestrel-containi...
journal_title:Thrombosis and haemostasis
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:2002-02-01 00:00:00
abstract::The tail bleeding time (BT) in rats definitely varies according to the method applied. Of the various variables that may influence BT, we have evaluated the position (horizontal or vertical) of the tail, the environment (air or saline), the temperature (4 degrees, 23 degrees or 37 degrees C) and the type of anaesthesi...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1982-08-24 00:00:00
abstract::The release of microvesicles ('platelet microparticles', PMPs) by activated platelets has been shown to be an integral part of the thrombotic process. PMPs are believed to mediate many biological processes as they possess various platelet membrane proteins and bioactive lipids. Of note, there is a growing body of evid...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:10.1160/TH05-03-0201
更新日期:2005-09-01 00:00:00
abstract::Platelet activation may contribute to the increased risk of thrombotic complications in patients with antiphospholipid antibodies (aPL). The increased urinary excretion of 11-dehydro-thromboxane B2 (11-DH-TXB2) reported in patients with lupus anticoagulant (LA) and/or anticardiolipin antibodies (aCL) reflects in vivo ...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::Computer-assisted oral anticoagulant dosage is being increasingly used to meet growing demands for oral anticoagulation. The DAWN AC is one of the most widely used computer-dosage programs. Evidence of its value and that of other computer programs has been based previously only on laboratory evidence of "time in targe...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,多中心研究,随机对照试验
doi:
更新日期:2009-03-01 00:00:00
abstract::We investigated the protective effects of DX-9065a, an orally active, newly synthesized and specific inhibitor of factor Xa, against two kinds of experimental disseminated intravascular coagulation (DIC) in rats. Endotoxin-induced experimental DIC was induced by a 4-h sustained infusion of endotoxin at a dose of 100 m...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1994-09-01 00:00:00
abstract::This study was performed to assess the prevalence of deep vein thrombosis (DVT) in consecutive obstetric patients with clinical symptoms of DVT, using impedance plethysmography (IPG) as the diagnostic method and to establish the safety of withholding anticoagulant therapy in patients with a repeatedly normal IPG. In a...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1992-01-23 00:00:00
abstract::We studied the effect of purified immunoglobulins (Ig) from 21 patients with antiphospholipid antibodies (aPL) on factor Va degradation by activated protein C (aPC) on cultured human umbilical vein endothelial cells (HUVEC). Sera from patients were tested on an ELISA aPL assay to determine the isotype with aPL activit...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1992-09-07 00:00:00
abstract::An experimental model incorporating cultured endothelial cells (EC) was used to study the "factor VIII bypassing" activity of prothrombin complex concentrates (PCC), a property exploited in the treatment of hemophiliacs with alloantibodies to factor VIII. Two PCC preparations were ineffective as stimuli of tissue fact...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1991-11-01 00:00:00
abstract:BACKGROUND: There have been no prior nationwide reports on the prevalence of hypertrophic cardiomyopathy (HCM) among patients suffering from atrial fibrillation (AF). It is also unclear how much stroke risk is attributable to HCM compared with other stroke risks in patients with AF. This study assessed the prevalence o...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1055/s-0038-1676818
更新日期:2019-02-01 00:00:00
abstract::A complex of heparin and a quaternary ammonium compound dissolved in an organic solvent was investigated for its potential ability to prevent clotting on the surface of plastic catheters. Despite the complexing of heparin to ammonium, anticoagulant activity remained on in vitro testing. Both the heparin complex and it...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1979-05-25 00:00:00
abstract::Use of oral contraceptives (OC) that combine a progestogen with synthetic ethinyl estradiol (EE) is associated with increased risk of venous thromboembolism. NOMAC/E2 is a new monophasic OC that combines nomegestrol acetate (NOMAC), a highly selective progestogen, with 17β-estradiol (E2). The study objective was to co...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,随机对照试验
doi:10.1160/TH10-05-0327
更新日期:2011-03-01 00:00:00
abstract::Accumulating evidence indicates that accelerated formation of fibrin clots composed of compact, highly-branched networks with thin fibres which are relatively resistant to plasmin-mediated lysis can be commonly observed in patients with venous or arterial thrombosis. This review discusses characteristics of fibrin clo...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:10.1160/TH14-01-0032
更新日期:2014-07-03 00:00:00
abstract::The structural determinants of lipopolysaccharide required for the induction of tissue factor in human umbilical vein endothelial cells were studied. Intact lipid A was essential for the induction of tissue factor whereas the incomplete lipid A precursors lipid IVA and lipid X, as well as monophosphoryl lipid A and ac...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1993-10-18 00:00:00
abstract:BACKGROUND:Infusions of apolipoprotein A-I (apoA-I), the major protein component of high-density lipoproteins (HDL), result in aortic valve stenosis (AVS) regression in experimental models. Severe AVS can be complicated by acquired von Willebrand syndrome, a haemorrhagic disorder associated with loss of high-molecular-...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH17-10-0729
更新日期:2018-02-01 00:00:00
abstract::Twenty-nine of 54 uremic patients had low levels of protein C measured as anticoagulant activity, contrasting with normal levels measured as amidolytic activity or antigenic concentration. We demonstrate that this discrepancy is due to the presence of a soluble plasma inhibitor that interferes specifically with the an...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1991-10-01 00:00:00
abstract::Tissue factor (TF) plays a pivotal role in thrombus formation and atherogenesis in acute coronary syndrome. Tissue factor pathway inhibitor (TFPI) is a specific physiological inhibitor of TF/FVIIa complex that regulates TF-induced coagulation. Adiponectin (Adp) is an adipocyte-specific adipocytokine with anti-atheroge...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2008-08-01 00:00:00
abstract::The Bernard-Soulier syndrome (BSS) is characterized by thrombocytopenia with giant platelets, a prolonged bleeding time with defective platelet adhesion to the subendothelium related to a defect in platelet membrane glycoprotein Ib (GPIb) and a decreased prothrombin consumption. The mechanism of the latter abnormality...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1997-02-01 00:00:00
abstract::It has previously been reported that EGF enhances uPA but not tPA in the A431 squamous carcinoma cell line. To determine whether the absence of tPA modulation by EGF reflected steady levels or the action of an anti-activator, we assayed tPA, PAI-1 and tPA/PAI-1 complexes by zymography and immunological assays. Under c...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1990-11-30 00:00:00
abstract::Individuals with type-1 diabetes mellitus (T1DM) have a higher risk of thrombosis and low plasma magnesium concentrations. As magnesium is a known regulator of fibrin network formation, we investigated potential associations between fibrin clot properties and plasma magnesium concentrations in 45 individuals with T1DM...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1055/s-0039-3402808
更新日期:2020-02-01 00:00:00
abstract::Heparin therapy was monitored with the activated partial thromboplastin time (APTT) and with chromogenic substrate assays (factor Xa and factor IIa inhibition) in 100 plasma samples from 47 patients. Heparin concentrations were classified as being below, within or above a defined therapeutic range (TR; 0.2-0.55 units ...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1987-10-28 00:00:00
abstract::Primary immune thrombocytopaenia (ITP) is the most common haemorrhagic disease. Although most patients respond initially to mainstream therapies, such as corticosteroids, immunosuppressants or rituximab, a large proportion of patients fail to respond or relapse. These treatments only affect B lymphocytes or short-live...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1055/s-0038-1669921
更新日期:2018-10-01 00:00:00
abstract::Platelets are critically involved in atherosclerosis and acute thrombosis. The platelet phenotype shows a wide variability documented by the inherited difference of platelet reactivity, platelet volume and count and function of platelet surface receptors. Several candidate genes have been put into focus and investigat...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:10.1160/TH13-02-0145
更新日期:2013-11-01 00:00:00
abstract::Our initial finding that CD40- and CD40 ligand (CD40L)-deficient mice displayed prolonged tail bleeding and platelet function analyzer (PFA-100) closure times prompted us to further investigate the role of the CD40-CD40L dyad in primary hemostasis and platelet function. Recombinant human soluble CD40L (rhsCD40L), chem...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH04-12-0774
更新日期:2005-06-01 00:00:00
abstract::We previously reported a monoclonal antibody named IF-43 that specifically recognizes thrombin-modified fibrinogen (desAA- and desAABB- fibrin monomer) bound with fibrinogen or other D(1) domain-containing plasmic fragments such as fragments X,Y, and D(1), but not intact fibrinogen or cross-linked fibrin degradation p...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2003-05-01 00:00:00
abstract::The in vitro effect of nifedipine, a calcium channel blocker of the dihydropyridine (DHP) type, on platelet aggregation was reinvestigated considering especially the capability of platelets to form endogenous nitric oxide (NO). We studied the dose-dependent antiaggregatory property of nifedipine in porcine platelet ri...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1994-08-01 00:00:00
abstract::The effect of a basic synthetic peptide, representing the C-terminal region of tissue factor pathway inhibitor (TFPI - Lys254 - Met276), as well as that of the whole protein, on the activity of lipoprotein lipase (LPL) is described. The activity of bovine LPL was measured by chromogenic assay using a water-soluble chr...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1999-12-01 00:00:00