Abstract:
:Two functional assays for protein C inhibitor (PCI) were evaluated in parallel for the same plasma samples. One assay is specific for active PCI and measures its ability to form complexes with activated protein C (APC) in the presence of heparin (España et al, Thromb Res 64, 309, 1991) (Method A). After incubation of samples with heparin and an excess of APC, the amount of APC:PCI formed is measured by an ELISA. The second functional PCI assay is based on the determination of the residual amidolytic activity of the APC added to the sample. In all cases a good correlation was obtained with both methods. For 20 healthy subjects and 20 patients before surgery, there were no significant between-assay differences in the levels of functional PCI activity. On the other hand, there were significant between-assays differences in the levels of functional PCI of the 20 patients measured 1 and 3 days after surgery. In this case, method B gave higher values than method A (38% +/- 13% versus 29% +/- 11% at day 1 and 59% +/- 16% versus 43% +/- 12% at day 3) (mean +/- SD). The level of alpha 1-antitrypsin (alpha 1 AT), the second major plasma APC inhibitor, was significantly increased in patients at day 1 and day 3 (133% +/- 30% and 190% +/- 57%, respectively). Furthermore, there was a positive correlation between the level of alpha 1AT and the normalized difference between the level of functional PCI measured by method B and that measured by method A. Additionally, when normal plasma was supplemented with increasing amounts of purified alpha 1AT, the level of PCI activity measured by method B increased parallel to the increase in alpha 1AT added, but that measured by method A did not. Determination of APC:inhibitor complexes in aliquots of the final mixtures utilized in the PCI assays revealed that the level of APC:alpha 1AT complex increased parallel to the increase in the amount of alpha 1AT added, whereas the APC:PCI complex level remained unchanged. We conclude that current functional PCI assays based on the determination of APC residual activity in plasma are not specific for PCI, are influenced by the level of plasma alpha 1AT and are not reliable for the determination of functional PCI levels in patients with altered levels of alpha 1AT.(ABSTRACT TRUNCATED AT 400 WORDS)
journal_name
Thromb Resjournal_title
Thrombosis researchauthors
España F,Hendl S,Gilabert J,Estellés A,Aznar Jdoi
10.1016/0049-3848(93)90079-4subject
Has Abstractpub_date
1993-06-01 00:00:00pages
375-84issue
5eissn
0049-3848issn
1879-2472journal_volume
70pub_type
杂志文章abstract:BACKGROUND:Peripheral pulmonary artery thrombus (PPT) is common in the clinic. However, due to the lack of an ideal diagnostic tool, PPT cannot be quickly diagnosed and effectively treated at present. Optical coherence tomography (OCT) is a new intravascular imaging technique that is characterized by high image resolut...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2017.10.021
更新日期:2018-01-01 00:00:00
abstract::A synthetic pentasaccharide, representing the critical sequence required in heparin for binding to antithrombin III (AT III), produces strong anti-factor Xa activity in vitro in the presence of AT III and is devoid of any activity directed towards thrombin. This pentasaccharide provides a unique tool to study the ques...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(87)90280-5
更新日期:1987-04-15 00:00:00
abstract::Human fibrinogen exposed to 46.5 degrees C was subjected to gel permeation chromatography. The protein eluted in two distinct peaks. The first peak appeared in the void volume containing soluble fibrinogen aggregates, while the other peak represented monomeric fibrinogen. In contrast to the monomeric peak material, th...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(96)00063-1
更新日期:1996-04-15 00:00:00
abstract::A significantly higher platelet malondialdehyde-like material (MDA--LM) content after physical and N-ethylmaleimide (NEM) stimulation is found in chronic ischemic heart disease (CHD) patients when compared to the control group. In subjects under aspirin treatment "in vivo" (1 gr/day) no difference is found between CHD...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(82)90305-x
更新日期:1982-09-01 00:00:00
abstract::The fibrinolytic potential of tissue-type plasminogen activator (t-PA) either incorporated in a clot (endogenous) or added to the surrounding plasma (exogenous), was studied in an in vitro system consisting of 125I-labeled human plasma clots (200 microliters) immersed in human plasma (2 ml). Clot lysis was measured as...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(84)90364-5
更新日期:1984-08-01 00:00:00
abstract:BACKGROUND:Clauss fibrinogen assay (CFA) is widely used as a screening test to detect fibrinogen disorders. However, CFA alone cannot distinguish quantitative and qualitative defects because it depends on functional fibrinogen activity (Ac), and fibrinogen antigen (Ag) determination is required to classify fibrinogen d...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2018.12.018
更新日期:2019-02-01 00:00:00
abstract::The turnover of tissue plasminogen activator (tPA) was studied in rabbits using a double-label technique which allowed the comparison of various tPA derivatives with a standard tPA in individual animals. Purified recombinant tPA (Alteplase) was labelled with 125I and used as a standard for each experiment. Various tPA...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(88)90278-2
更新日期:1988-07-01 00:00:00
abstract::Megakaryocyte colony formation was increased in 13 patients with ITP. Out of splenectomized ITP patients Colony Forming Unit-Megakaryocyte (CFU-Mk) number normalized in four but was lower than normal in the remaining two. The proportion of immature megakaryocytes was higher in ITP than in normals or in ITP patients af...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(91)90672-j
更新日期:1991-04-01 00:00:00
abstract:BACKGROUND:The plasminogen activator inhibitor type 1 (PAI-1) 4G/5G polymorphism may have significance for PAI-1 expression. High levels of PAI-1 in breast cancer patients are associated with a poor prognosis. In this study, we analyzed the influence of the PAI-1 4G/5G polymorphism on tissue PAI-1 levels and its associ...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2005.03.025
更新日期:2006-01-01 00:00:00
abstract::We studied a Japanese family with type I antithrombin (AT) deficiency and identified a novel in-frame deletion mutation (-ATG at nucleotide position of 2771-2773) in the AT gene, which predicted loss of a methionine (Met) at amino acid number of 103. In addition, we found a single base replacement of G to A at nucleot...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2004.12.004
更新日期:2005-01-01 00:00:00
abstract:INTRODUCTION:The activation of coagulation is recognized as a universal event in severe sepsis. Both antithrombin and thrombomodulin play pivotal roles as suppressors of coagulation. Since the levels of both anticoagulants decrease significantly, we hypothesized that a combination therapy would be beneficial. METHODS:...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2014.04.015
更新日期:2014-07-01 00:00:00
abstract::Red blood cells have historically been viewed as innocent bystanders in the process of blood coagulation and thrombin generation; however a century of clinical evidence linking red blood cells to thrombosis suggests the contrary. In this brief review, the biochemical evidence for red blood cell involvement in thrombin...
journal_title:Thrombosis research
pub_type: 杂志文章,评审
doi:10.1016/j.thromres.2013.01.023
更新日期:2013-05-01 00:00:00
abstract::A new method, based on the observation that leukocytes contain PGI2-synthetase activity, was used to measure the effect of pharmacological levels of sulphinpyrazone on the TXA2 and PGI2 production in whole blood. Four human volunteers took 400 mg sulphinpyrazone twice daily for 5 1/2 days. Blood was drawn before the s...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(82)90033-0
更新日期:1982-10-01 00:00:00
abstract:INTRODUCTION:Ticagrelor and prasugrel are recommended as first line therapy in patients with acute coronary syndromes (ACS). However, patients with anemia are commonly treated with clopidogrel in routine clinical practice. The RENAMI registry (REgistry of New Antiplatelet therapy in patients with acute Myocardial Infar...
journal_title:Thrombosis research
pub_type: 杂志文章,多中心研究
doi:10.1016/j.thromres.2018.05.024
更新日期:2018-07-01 00:00:00
abstract::Clot lysis induced by streptokinase has been studied and the influences of pH and the concentrations of plasminogen, fibrinogen and buffer composition investigated. Variations in the concentrations of plasminogen strongly effect the SK apparent activity, maxima being obtained at different plasminogen concentrations li...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(91)90071-4
更新日期:1991-12-15 00:00:00
abstract::Interaction with circulating platelets is considered an important virulent mechanism for Staphylococcus aureus (S. aureus) bacteria to induce endocarditis, a severe infectious disease with high incidence of systemic thrombosis. It therefore represents an important target for pharmacological intervention. In this study...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2004.11.016
更新日期:2005-01-01 00:00:00
abstract::Therapeutic developments have seen significant improvement in mortality over the past thirty years for breast, colorectal and prostate cancer. Lung cancer is the commonest cancer in the world, but has seen little improvement in survival figures. The role of low-molecular-weight heparin (LMWH) in improving cancer survi...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/S0049-3848(12)70029-4
更新日期:2012-04-01 00:00:00
abstract::G-proteins play a major role in cell signaling and specific abnormalities in these proteins have been implicated in some diseases. Although, two human G alpha q coding sequences are published, they differ at functionally important regions. We have sequenced the human G alpha q cDNA synthesized from normal platelet mRN...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/s0049-3848(98)00071-1
更新日期:1998-07-01 00:00:00
abstract::The placenta is the highly specialised organ of pregnancy that supports the normal growth and development of the fetus. Growth and function of the placenta are precisely regulated and coordinated to ensure the exchange of nutrients and waste products between the maternal and fetal circulatory systems operates at maxim...
journal_title:Thrombosis research
pub_type: 杂志文章,评审
doi:10.1016/j.thromres.2004.06.038
更新日期:2004-01-01 00:00:00
abstract::The protease inhibitor, aprotinin, has been examined for its ability to inhibit urokinase and tissue-type plasminogen activators at pH 7.4 in assays utilizing pyroGlu-Gly-Arg-p-nitroanilide and H-D-Ile-Pro-Arg-p-nitroanilide as substrates, respectively. Aprotinin inhibited both two-chain low molecular weight urokinase...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(88)90252-6
更新日期:1988-03-15 00:00:00
abstract::The three main components involved in thrombosis and haemostasis are thrombin, platelets, and plasmin. Almost all inhibitors of thrombosis are focused either on the inhibition of thrombin or on the inhibition of platelets. We designed a construct using the fibrinolytic activity of staphylokinase, fused via a cleavable...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/s0049-3848(97)00277-6
更新日期:1997-12-01 00:00:00
abstract::Human tissue plasminogen activator (t-PA) was shown to bind specifically to human osteosarcoma cells (HOS), and human epidermoid carcinoma cells (A-431 cells). Crosslinking studies with DTSSP demonstrated high molecular weight complexes (130,000) between 125I-t-PA and cell membrane protein on human umbilical vein endo...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(90)90136-z
更新日期:1990-07-15 00:00:00
abstract::The perfusion technique to measure the relative adhesive and thrombogenic indices of vascular prostheses by a quantitative scanning electron microscopy has been described. To normalize the experiments with different samples of plasma we compared the adhesive and thrombogenic properties of the analyzed prostheses with ...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(83)90038-5
更新日期:1983-02-01 00:00:00
abstract:BACKGROUND:Statins have been shown to have a protective effect for venous thromboembolism (VTE) in the general population. This study sought to assess the association between statins and the risk for cancer-associated deep vein thrombosis (DVT) and pulmonary embolism (PE). METHODS:Patients with newly diagnosed cancer ...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2017.08.001
更新日期:2017-10-01 00:00:00
abstract:BACKGROUND:The quality of treatment with warfarin is mainly assessed by the time in therapeutic range (TTR) in patients with mechanical heart valve prosthesis (MHV). Our aim was to evaluate if International Normalized Ratio (INR) variability predicted a combined endpoint of thromboembolism, major bleeding and death bet...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2015.10.044
更新日期:2015-12-01 00:00:00
abstract:INTRODUCTION:Ductal carcinoma in-situ (DCIS) is a preinvasive breast cancer where cancer cells remain confined within the ductal basement membrane. However, genotypic changes have been identified in stroma surrounding DCIS, outside the basement membrane. Stromal fibroblasts undergo phenotypic change in cancer to promot...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/S0049-3848(16)30154-2
更新日期:2016-04-01 00:00:00
abstract:INTRODUCTION:von Willebrand factor (VWF) is synthesised in vascular endothelial cells and released into the plasma as unusually large VWF multimers (UL-VWFMs). Sinusoidal endothelial cells are a major target of ischaemia-reperfusion injury due to liver surgery. This study aimed to clarify the effect of hepatectomy on U...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2019.09.005
更新日期:2019-11-01 00:00:00
abstract::Triflavin, an Arg-Gly-Asp (RGD)-containing disintegrin purified from venom peptide inhibited platelet aggregation by interfering with the interaction of fibrinogen with alpha(IIb)beta(3) integrin. Using an immunostaining technique and electron microscopy, we investigated and compared the distribution of triflavin bind...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/s0049-3848(03)00104-x
更新日期:2003-01-01 00:00:00
abstract::Stent implantation after balloon dilation of coronary arteries has improved clinical prognosis in patients undergoing transluminal coronary angioplasty (PTCA), but late restenosis remains a relevant problem. A previous study has indicated that PAI-1 activity changes immediately after PTCA without stent implantation ar...
journal_title:Thrombosis research
pub_type: 临床试验,杂志文章
doi:10.1016/s0049-3848(01)00360-7
更新日期:2001-11-01 00:00:00
abstract::125I-fibronectin is incorporated into fibrin when blood plasma is clotted with thrombin. This process is dependent upon fibronectin concentration, temperature, and the presence of calcium ions. Fibronectin appears to be a very strong inhibitor of fibrin formation and influences both the thrombin clotting time and fibr...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(82)90308-5
更新日期:1982-09-01 00:00:00