Abstract：
:Interactions between proteins and heparin(-like) structures involve electrostatic forces and structural features. Based on charge distributions in the linear sequence of protein C inhibitor (PCI), two positively charged regions of PCI were proposed as possible candidates for this interaction. The first region, the A+ helix, is located at the N-terminus (residues 1-11), whereas the second region, the H helix, is positioned between residues 264 and 280 of PCI. Competition experiments with synthetic peptides based on the sequence of these regions demonstrated that the H helix has the highest affinity for heparin. In contrast to previous observations we found that the A+ helix peptide competed for the interaction of PCI with heparin, but its affinity was much lower than that of the H helix peptide. Recombinant PCI was also used to investigate the role of the A+ helix in heparin binding. Full-length (wild-type) rPCI as well as an A+ helix deletion mutant of PCI (rPCI-delta 2-11) were expressed in baby hamster kidney cells and both had normal inhibition activity with activated protein C and thrombin. The interaction of the recombinant PCIs with heparin was investigated and compared to plasma PCI. The A+ helix deletion mutant showed a decreased affinity for heparin in inhibition reactions with activated protein C and thrombin, but had similar association constants compared to wild-type rPCI. The synthetic A+ helix peptide competed with rPCI-delta w-11 for binding to heparin. This indicated that the interaction between PCI and heparin is fairly non-specific and that the interaction is primarily based on electrostatic interactions. In summary, our data suggest that the H helix of PCI is the main heparin binding region of PCI, but the A+ helix increases the overall affinity for the PCI-heparin interaction by contributing a second positively charged region to the surface of PCI.
journal_name
Thromb Haemostjournal_title
Thrombosis and haemostasisauthors
Elisen MG,Maseland MH,Church FC,Bouma BN,Meijers JCsubject
Has Abstractpub_date
1996-05-01 00:00:00pages
760-6issue
5eissn
0340-6245issn
2567-689Xjournal_volume
75pub_type
杂志文章abstract：:We studied the HR2 haplotype of the factor V gene in a case-control study for venous thrombosis including 474 patients with a first deep-vein thrombosis and 474 age- and sex-matched healthy controls (Leiden Thrombophilia Study, LETS). We investigated both the original His1299Arg (A4070G) polymorphism and the Met385Thr...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2000-04-01 00:00:00
abstract：:Recombinant factor VIIa (rFVIIa; Novoseven) is used for treatment of hemophilia patients with inhibitors. There are poorly defined differences in clinical responsiveness between individuals. Prior to licensure in the United States, rFVIIa was available through the compassionate use program, during which two patients d...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2002-07-01 00:00:00
abstract：:Imaging methods based on time-lapse microscopy are important tools for studying the dynamic events that shape thrombus formation upon vascular injury. However, there is a lack of methods to translate the vast amount of visual data generated in such experiments into quantitative variables describing platelet movements ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1055/s-0038-1668151
更新日期：2018-09-01 00:00:00
abstract：:In wound repair, fibrin has a multiplicity of activities, some of which are intrinsic to the protein itself and some attributable to other blood constituents associated with the fibrin clot. Fibrin sealants, which have been approved for hemostasis in the US and Europe, are occasionally used wounds to promote healing. ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章,评审
doi：10.1160/TH03-08-0526
更新日期：2003-12-01 00:00:00
abstract：:Antithrombin readily undergoes a spontaneous transition from its active five-stranded form to a six-stranded inactive latent form. The recognition of this change in plasma has been obscured by the immediate linkage of newly formed latent antithrombin to a molecule of active antithrombin to give a dimer with an electro...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章,评审
doi：
更新日期：2001-07-01 00:00:00
abstract：:It was our aim to assess whether factor V Leiden (FVL) and G20210A prothrombin (FII) mutation are associated with the presence of residual vein obstruction (RVO) after a standard course of anticoagulation for a first episode of idiopathic proximal deep-vein thrombosis (DVT) of the lower limbs, with or without symptoma...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1160/TH12-01-0041
更新日期：2013-03-01 00:00:00
abstract：:A series of aromatic amidino compounds were investigated for their inhibitory effect on platelet agglutination and platelet aggregation. Agglutination of fresh or fixed platelets was produced by bovine plasma or by human plasma in combination with ristocetin, while aggregation of fresh platelets was induced by ADP, th...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1978-04-30 00:00:00
abstract：:Various tests were evaluated for their capacity to differentiate between platelet suspensions with different degrees of cell damage. Those suspensions were prepared by simultaneous isolation of platelets from the same platelet-rich plasma (PRP) using the following procedures: 1. centrifugation at 4 degrees C with EDTA...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1978-02-28 00:00:00
abstract：:Deep-vein thrombosis (DVT) is a common condition that often leads to pulmonary thromboembolism (VTE) and death. The role of prostaglandin-endoperoxide synthase (PTGS)2 in arterial thrombosis has been well established, whereas its impact in venous thrombosis remains unclear. Here, we showed that PTGS2 deletion predispo...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH16-12-0968
更新日期：2017-07-26 00:00:00
abstract：:Thrombin-induced platelet release reaction examined with secretion of calcium and N-acetylglucosaminidase was significantly enhanced in the platelets from reserpine-treated rabbits as compared with the control. On the other hand, 32P-incorporation into phosphatidic acid was suppressed in the reserpinized platelets in ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1983-08-30 00:00:00
abstract：:This study was performed to follow up on the observation that gelatinase A (MMP-2) deficiency impairs adipose tissue development in mice. The aim was to evaluate the role of its functional homologue gelatinase B (MMP-9) in adipose tissue growth. MMP-9 antigen levels were determined in lean and in obese women before an...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH09-10-0739
更新日期：2010-07-01 00:00:00
abstract：:Endothelial dysfunction and increased platelet aggregation may be involved in the pathogenesis of normal tissue radiation toxicity. This study assessed clopidogrel, an inhibitor of ADP-induced platelet aggregation, as a modulator of intestinal radiation injury (radiation enteropathy). Rat small intestine was exposed t...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2002-01-01 00:00:00
abstract：:Extensive contact between blood and artificial surfaces causes platelet activation and depletion. The aim of the present study was to test the efficacy of Ro 44-9883, a potent and selective peptidomimetic GPIIb-IIIa antagonist, in preventing platelet loss in guinea pigs undergoing extracorporeal circulation (ECC) with...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1993-11-15 00:00:00
abstract：:This study aimed to evaluate the relationship between anaemia and pulmonary embolism (PE) prognosis. We analysed a cohort of 764 patients with acute PE referred to a single center for diagnosis and management. Patients were divided into groups by quartiles of haemoglobin (Hb): Hb < 11.7 g/dl; Hb 11.7 to 12.9 g/dl; Hb ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH09-01-0003
更新日期：2009-07-01 00:00:00
abstract：:The surface of the platelet expresses procoagulant phospholipids that bind coagulation factors and contribute to the procoagulant activity of the cell. The evidence, however, also suggests that platelets may possess specific receptors for coagulation Factors V(a) and VIII(a). Examination of a limited set of the availa...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章,评审
doi：
更新日期：1993-07-01 00:00:00
abstract：:The binding of the urokinase plasminogen activator (uPA) to its receptor (uPAR) regulates cell adhesion, surface proteolysis, chemotaxis and cell extravasation in a number of experimental systems. Recent evidences have suggested that uPAR can by itself mediate chemotaxis of human monocytes and cause profound changes i...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章,评审
doi：
更新日期：1999-09-01 00:00:00
abstract：:Platelets and coagulation are involved in bacterial colonisation of the host. Streptocococcus pneumoniae (pneumococcus) are important etiologic agents of respiratory tract infections in humans. The formation of pneumococci-platelet associations may facilitate haematogenous dissemination of pneumococci by providing an ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH09-01-0049
更新日期：2009-10-01 00:00:00
abstract：:During treatment with vitamin K antagonists, International Normalized Ratios (INR) are determined periodically to maintain a therapeutic level of anticoagulation. We evaluated two existing methods for therapeutic quality control (linear interpolation and equidivision), with regard to their validity and reproducibility...
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：1999-10-01 00:00:00
abstract：:Lupus anticoagulants (LA) are immunoglobulins directed to either prothrombin or Beta-2-glycoprotein 1(beta1GPI) bound to phospholipids. Most patients with LA have both beta2GPI- and prothrombin-dependent antibodies. Several recent reports have shown that LA is more strongly associated with thrombosis than anticardioli...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章,多中心研究
doi：
更新日期：1999-06-01 00:00:00
abstract：:This study examines the relationship between plasma Plasminogen Activator Inhibitor-1 (PAI-1) activity and the PAI-1 4G/5G polymorphism, and their association with the risk of myocardial infarction (MI). Furthermore, this study explores whether a high level of PAI-1 or whether the PAI-1 4G/5G polymorphism synergistica...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2003-06-01 00:00:00
abstract：:In patients with atrial fibrillation (AF) who require interruption of dabigatran or warfarin for an elective surgery/procedure, the risks and benefits of perioperative bridging anticoagulation is uncertain.We accessed the database from RE-LY, a randomised trial comparing dabigatran with warfarin for stroke prevention ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH14-04-0305
更新日期：2015-03-01 00:00:00
abstract：:We have investigated the effect of a new Leu196Pro mutation, identified in the MIDAS-like domain of the beta3 integrin subunit in a patient with type II Glanzmann thrombasthenia, on beta3 integrin receptor function. Expression of the mutant beta3Pro196 subunit in CHO cells, either associated with recombinant human alp...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2001-12-01 00:00:00
abstract：:Prothrombin complex concentrates (PCC) are known to carry a risk of thromboembolism. We have chosen to reassess the problem of detecting in vivo signs of activation of the clotting mechanism by assaying fibrinopeptide A (FpA) after PCC administration in hemophilic patients during bleeding episodes. FpA was significant...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1980-10-31 00:00:00
abstract：:In vitro and in vivo effects of adrenaline (ADR) on platelet aggregation, on platelet factor 3 (PF3) availability and on platelet factor 4 (PF4) release were studied in man. Inhibitory action of an alpha-blocker, phentolamine (PHEN) was investigated in the same conditions. The threshold concentration (TC) of ADR induc...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1978-10-31 00:00:00
abstract：:We have investigated the role of two vasoactive substances, nitric oxide (NO)and endothelin (ET), in the pathophysiology of disseminated intravascular coagulation (DIC), using two types of DIC models. Experimental DIC was induced by sustained infusion of 0.1, 1, 10, or 50 mg/kg lipopolysaccharide (LPS), or 3.75 U/kg t...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2002-10-01 00:00:00
abstract：:Residual venous obstruction (RVO) in patients with previous deep vein thrombosis (DVT) of the lower limbs has been suggested as an independent risk factor for recurrent venous thromboembolism (VTE). RVO could be a marker of a persistent prothrombotic state. We have compared the rate of RVO in patients with DVT and a p...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH04-12-0817
更新日期：2005-07-01 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：:In patients with myeloproliferative disorders (MPD) a group of related diseases of the bone marrow stem cell and recurrent haemorrhagic and/or thrombotic complications, the production of aggregating prostaglandins (PGs) may be normal or slightly reduced, while PGI2 production is normal. However, MPD platelet sensitivi...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1988-02-25 00:00:00
abstract：:Per cent aggregation, release and content of adenine nucleotides, and specific radioactivity were evaluated in citrated platelet-rich plasma (PRP) prepared from paired samples of maternal and cord blood. Platelets of newborn infants aggregated normally in response to highdose ADP (20 muM), strong collagen suspensions,...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1976-08-31 00:00:00
abstract：:This study aims to establish the relative effectiveness and safety of low molecular weight heparin in elderly patients with venous thrombosis in order to find an alternative to oral anticoagulant therapy with less bleeding complications in the long-term treatment of deep venous thrombosis (DVT). One hundred consecutiv...
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：2000-10-01 00:00:00
