Abstract：
:The preparation of antithrombin concentrate for clinical use requires a viral inactivation step. In most commercial preparations this is achieved by heat pasteurisation. This process would be expected to alter the conformation of antithrombin from the active native species to an inactive latent (L-form) state (1, 2). To determine if this occurs during commercial preparation and to identify the proportion of the product in the inactive state, we examined the various antithrombin conformations within a therapeutic concentrate. The antithrombin concentrate was separated into five fractions by heparin-Sepharose chromatography. The fraction with the highest heparin affinity retained full activity, whereas the four fractions with reduced heparin affinity (approximately 40% of the total antithrombin) had lost their inhibitory function. These inactive antithrombins were intact, monomeric, thermostable and resistant to unfolding in 8 M urea. Moreover, the protein patterns on isoelectric focusing and non-denaturing-PAGE showed that there were at least two different L-forms with isoelectric points separate from the native active species. Our findings demonstrate that approximately 40% of the antithrombin preparation examined exists as inactive L-forms. The clinical significance of administering this altered material is uncertain.
journal_name
Thromb Haemostjournal_title
Thrombosis and haemostasisauthors
Chang WS,Harper PLsubject
Has Abstractpub_date
1997-02-01 00:00:00pages
323-8issue
2eissn
0340-6245issn
2567-689Xjournal_volume
77pub_type
杂志文章abstract：:Several members of a family from Scranton, Pennsylvania were identified to have normal levels of prothrombin antigen while their prothrombin clotting activity was approximately 50% of normal. There has been no previous history of bleeding or other clinical manifestations in this family. The genomic DNA from the proban...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2001-04-01 00:00:00
abstract：:By a method of counting single platelets in diluted whole blood, platelet aggregates were quantified ex-vivo. Four groups: 20 thrombotic patients, 10 non-thrombotic patients, 10 healthy old controls and 10 healthy young controls were included in the study. Using a 19 gauge needle, with and without tubing, venous blood...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1986-08-20 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：:Integrins are cell surface adhesion receptors that participate in a variety of important processes throughout the vasculature. Here we summarize some recent findings on the regulation of integrin mediated cellular adhesion. Particular emphasis is placed on the regulation of integrin affinity for ligand (activation), a...
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：: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：:Current biochemical markers of thrombosis, such as d-dimer, are of little value in demonstrating the presence of thrombus postoperatively, as their levels are elevated by surgery. Thrombosis involves adhesive interactions between the endothelium, platelets and leukocytes. The aim of the study was to determine which of...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1999-12-01 00:00:00
abstract：:We examined the ability of unfractionated heparin to modulate the procoagulant activities of stimulated endothelial cells (EC). Confluent human venous umbilical EC were incubated with heparin before or after stimulation, then rinsed extensively to eliminate any heparin in the solution. EC, stimulated for 4 h with endo...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1996-01-01 00:00:00
abstract：:The leech protein hirudin is a potent inhibitor of thrombin, but clinical use of recombinant hirudin is restricted by haemorrhagic risks, and complicated by hirudin's rapid clearance from the circulation. We previously employed albumin fusion to slow hirudin variant 3 (HV3) clearance. In this study, we hypothesized th...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2009-05-01 00:00:00
abstract：:An assay for the quantification of pentosan polysulphate (PPS) in plasma is described. As PPS has been shown to potentiate thrombin inhibition by the second heparin cofactor (HC II), the principle of this assay was to measure the formation of covalent complexes between HC II and the thrombin generated in plasma after ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1986-12-15 00:00:00
abstract：:A fibrinolysis inhibitor was purified in serum from post-traumatic patients by the use of flat bed electrofocusing of serum desalted by gel chromatography followed by affinity chromatography on a column of matrix-linked plasminogen. Disc gel electrophoresis yielded one protein band. The inhibitor protein was also foun...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1978-02-28 00:00:00
abstract：:Neonatal platelets are hypo-reactive to the tyrosine kinase-linked receptor agonist collagen. Here, we have investigated whether the hypo-responsiveness is related to altered levels of glycoprotein VI (GPVI) and integrin α2β1, or to defects in downstream signalling events by comparison to platelet activation by C-type...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1055/s-0038-1646924
更新日期：2018-06-01 00:00:00
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 (A...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1994-05-01 00:00:00
abstract：:The alphaIIbeta3 receptor (GPIIb/IIIa) is the only platelet-specific integrin receptor and the most abundant adhesion/aggregation receptor on the surface of human platelets. Since mice are increasingly being used as models of human disease, we analyzed the structure and function of murine platelet alphaIIbeta3, utiliz...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2000-12-01 00:00:00
abstract：:The fibrinolytic capacity of 121 patients with a history of venous thrombosis and/or pulmonary embolism was studied by venous occlusion technique, at earliest 3 months after the last thromboembolic episode. After discontinuation of oral anticoagulation treatment the clinical course of the patients was followed and new...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1984-10-31 00:00:00
abstract：:Bacterial pneumonia, the most common cause of sepsis, is associated with activation of coagulation. Factor XI (FXI), the key component of the intrinsic pathway, can be activated via factor XII (FXII), part of the contact system, or via thrombin. To determine whether intrinsic coagulation is involved in host defence du...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH16-12-0920
更新日期：2017-07-26 00:00:00
abstract：:Arterial stenosis results in a complex pattern of blood flow containing an extremely fast flow in the throat of stenosis and a post-stenosis low flow. The fast flow generates high shear stress that has been demonstrated in vitro to activate and aggregate platelets. One potential problem of these in vitro studies is th...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2002-11-01 00:00:00
abstract：:This study assessed the frequency and factors associated with failure to correct international normalised ratio (INR) in patients administered fresh frozen plasma (FFP) for warfarin-related major bleeding. This retrospective database analysis used electronic health records from an integrated health system. Patients wh...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH11-09-0646
更新日期：2012-04-01 00:00:00
abstract：:Sulodexide, a highly purified glycosaminoglycan, was investigated for treatment of venous leg ulcers. Patients (n = 235) undergoing local treatment including wound care and compression bandaging, were randomised to receive either sulodexide or matching placebo for three months. Primary study endpoint was complete ulce...
journal_title：Thrombosis and haemostasis
pub_type： 临床试验,杂志文章,多中心研究,随机对照试验
doi：
更新日期：2002-06-01 00:00:00
abstract：:Patients with diabetes display increased platelet activation. Recent data show a markedly increased risk for cardiovascular events already in pre-diabetic individuals with impaired glucose tolerance (IGT). We investigated whether IGT is associated with platelet activation. Blood samples were collected from young lean ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH04-02-0118
更新日期：2004-07-01 00:00:00
abstract：:Probands from 15 unrelated families with hereditary protein S deficiency type I, that is having a plasma total protein S concentration fifty percent of normal, were screened for abnormalities in their protein S genes by Southern analysis. Two probands were found to have a deviating DNA pattern with the restriction enz...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1989-11-24 00:00:00
abstract：:Fibrinogen degradation products were investigated for leukocyte chemotactic activity and for enhancement of vascular permeability. Both activities increased progressively with plasmin digestion of fibrinogen. Active fragments were partially purified from 24 hr-plasmin digests. Molecular weights of the permeability inc...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1981-02-23 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
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：:It is known that thrombosis is a leading cause of vascular access failure and that the formation of thrombus requires platelets. The activation of platelets induces the increase in intracellular Ca 2(+) levels ([Ca(2+)](i)) leading to aggregation and thrombosis. We compared the platelet [Ca(2+)](i) before and after st...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH04-01-0048
更新日期：2004-09-01 00:00:00
abstract：:Thrombopoietin is produced at a constant rate by the liver and kidney and is removed from the circulation upon binding and subsequent uptake via the Tpo receptor, c-Mpl, expressed by platelets and mega-karyocytes. Apart from uptake, this study shows that platelets can also function as a storage pool for Tpo. Upon stim...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2000-06-01 00:00:00
abstract：:A nutritionally induced obesity model was used to investigate the modulation of fibrinolytic and gelatinolytic activity during the development of adipose tissue. Five week old male mice were fed a standard fat diet (SFD, 13% kcal as fat) or a high fat diet (HFD, 42% kcal as fat) for up to 15 weeks. The HFD resulted in...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2002-08-01 00:00:00
abstract：:Treatment with the direct thrombin inhibitor argatroban (ARG) is often followed by vitamin K-antagonist treatment (VKA). Phenprocoumon (PC) and acenocoumarol (AC) are frequently used in Europe. The standard monitoring test for VKA, pro-thrombin time (PT), is prolonged by direct thrombin inhibitors. Therefore the Inter...
journal_title：Thrombosis and haemostasis
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1160/TH03-12-0794
更新日期：2004-06-01 00:00:00
abstract：:The amino acid sequence of the subunit of human platelet factor 4 has been determined. Human platelet factor 4 consists of identical subunits containing 70 amino acids, each with a molecular weight of 7,756. The molecule contains no methionine, phenylalanine or tryptophan. The proposed amino acid sequence of PF4 is: G...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1980-02-29 00:00:00
abstract：:Platelet aggregation and fibrinogen binding in whole blood, induced either by ADP or by a 14 amino acid peptide mimicking an N-terminal region of the platelet thrombin receptor (TRP, thrombin receptor activating peptide), have been studied with blood from different species. Aggregation was assessed by counting the num...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1993-09-01 00:00:00
abstract：:Subcutaneous heparin is the treatment of choice for women requiring anticoagulant therapy during pregnancy. However, heparin therapy presents a management problem at delivery because of its potential to cause a persistent anticoagulant effect and thus increase the risk of bleeding. In order to avoid therapeutic compli...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1991-03-04 00:00:00
