Abstract：
:Apixaban does not require monitoring nor frequent dose adjustment. However, searching for the optimal dose for the individual patient may be useful in some situations. Moreover, there is a need for clinicians to know whether coagulation assays are influenced by apixaban use. The aim of this study was to determine which coagulation assay could be used to assess the impact of apixaban on haemostasis and provide good laboratory recommendations for the accurate interpretation of haemostasis assays. Apixaban is spiked at concentrations ranging from 5 to 500 ng/mlin platelet-poor plasma. Routinely used or more specific coagulation assays are tested. Results show a concentration dependent prolongation of aPTT, PT and dilute PT. The sensitivity mainly depends on the reagent, but none of these tests is sensitive enough to ensure an accurate estimation of the pharmacodynamic effect of apixaban. FXa chromogenic assays show high sensitivity and a linear correlation depending on the reagent and/or the methodology. Immunological assays and assays acting below the FXa are not influenced by apixaban. In conclusion, PT and/or dilute PT cannot be used to assess apixaban pharmacodynamic properties. More specific and sensitive assays such as chromogenic FXa assays using specific calibrators are required. In case of thrombophilia or in the exploration of a haemorrhagic event, immunological assays should be recommended, when applicable. Standardisation of the time between the last intake of apixaban and the sampling is mandatory.
journal_name
Thromb Haemostjournal_title
Thrombosis and haemostasisauthors
Douxfils J,Chatelain C,Chatelain B,Dogné JM,Mullier Fdoi
10.1160/TH12-12-0898subject
Has Abstractpub_date
2013-08-01 00:00:00pages
283-94issue
2eissn
0340-6245issn
2567-689Xpii
12-12-0898journal_volume
110pub_type
杂志文章abstract：:Among the nine ellagitannins, rugosin E was the most potent platelet aggregating agent with an EC50 of 1.5 +/- 0.1 microM in rabbit platelets and 3.2 +/- 0.1 microM in human platelets. The aggregations caused by rugosin E and ADP were inhibited by EGTA, PGE1, mepacrine, sodium nitroprusside and neomycin, but not by in...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1997-03-01 00:00:00
abstract：:The effect of shear rate and fibrinogen concentration on adenosine diphosphate-induced aggregation of suspensions of washed human platelets in Poiseuille flow at 23 degrees C was studied using a previously described double infusion technique and resistive particle counter size analysis. Using suspensions of multiple-c...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1994-01-01 00:00:00
abstract：:Mouse C127 epithelioid cells were genetically engineered to produce biologically active gamma-carboxylated human protein S. A full length human protein S cDNA was cloned into a bovine papilloma virus (BPV) based shuttle vector under the transcriptional control of the Moloney murine sarcoma virus enhancer and the mouse...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1992-05-04 00:00:00
abstract：:Accumulation of the newly formed 14C-cyclic adenosine 3',5'-monophosphate (cyclic AMP) was found in the P1 (1.0) fraction, i.e. a platelet plasma membrane fraction which was obtained from 14C-adenine-labeled platelets. On the other hand, total cyclic AMP as determined simultaneously was located mainly in the platelet ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1983-02-28 00:00:00
abstract：:The effects on the haemostatic mechanism of oestrogen therapy, given to prevent bone loss in post-menopausal women, have been investigated. Oestriol succinate was given orally to 10 women at a level of 2 mg/day for 1 month and for a further 3 months with incremental increase of 2 mg each month. 6 of the 10 women were ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1976-04-30 00:00:00
abstract：:Activation of leukocytes plays an essential role in the mechanism of restenosis. Prior research has focused on monocytes and little is known about the role of neutrophils in this process. Neutrophils are known to contribute to tissue injury through oxygen-derived free radicals that nitrate tyrosine. This study was des...
journal_title：Thrombosis and haemostasis
pub_type： 临床试验,杂志文章
doi：
更新日期：2006-01-01 00:00:00
abstract：:Thrombin activatable fibrinolysis inhibitor (TAFI) attenuates fibrinolysis and is considered as an attractive drug target. We generated two different antibody fragments, an antigen-binding fragment (Fab) and a single-chain variable fragment (scFv), derived from three distinct monoclonal antibodies (MAs) that inhibit t...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH08-09-0834
更新日期：2009-07-01 00:00:00
abstract：:TAK-442 is an oral direct factor Xa inhibitor. We sought to determine the dose-dependent effect of TAK-442 on major bleeding when added to standard treatment in stabilised patients with acute coronary syndrome (ACS). In this phase II double-blind study, 2,753 ACS patients were randomised to TAK-442 or placebo in addit...
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/TH13-07-0543
更新日期：2014-06-01 00:00:00
abstract：:The influence of the sympathetic nervous system on platelet functions in vivo is still controversial. The aims of our study were to compare the response to various sympathetic stimuli in normal subjects and in patients with essential hypertension (HT) or peripheral vascular disease (PVD) and to evaluate any correlatio...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1990-06-28 00:00:00
abstract：:Growing evidence indicates that rheumatoid arthritis (RA) is associated with an increased risk for thromboembolic cardiovascular events. We investigated thrombin generation profiles in RA patients and their dependence on plasma factor/inhibitor composition. Plasma factor (F) compositions (II, V, VII, VIII, IX, X), ant...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH10-02-0091
更新日期：2010-08-01 00:00:00
abstract：:The effect of negatively-charged polymers, used in some artificial devices, on plasma clotting and kinin systems was studied in vitro using polyelectrolyte complexes. Contact activation was observed as an immediate, transient and surface-dependent phenomenon. After incubation of the plasma with the polymer a small dec...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1984-02-28 00:00:00
abstract：:Although it is recognized that glycoprotein (GP) IIb-IIIa complexes are deficient in platelets in Glanzmann's thrombasthenia, little is known of the origin of the defect. We have examined the megakaryocytes in a bone marrow aspirate obtained from a thrombasthenia patient during surgery. Analysis of platelet proteins b...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1986-08-20 00:00:00
abstract：:Vasopressin infusions in normal volunteers that produce concentrations in plasma comparable to those seen during stress, cause an increase in plasma factor VIII and shortening of the euglobulin clot lysis time (ECLT). We have investigated the relationship between endogenous vasopressin (aVP) release and haemostatic fu...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1986-02-28 00:00:00
abstract：:The endocannabinoid anandamide (AEA) has many neurovascular activities. However, it is not yet clear how AEA can be metabolized at the neurovascular interface, and how it can move through the vascular and the cerebral compartments. The results reported in this article show that isolated bovine brain microvessels, an e...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：2006-01-01 00:00:00
abstract：:Much research in venous thrombotic diseases focuses on the acute thrombotic process such as anticoagulation and risk factors. Deep-vein thrombosis directly leads to post thrombotic syndrome, and this can cause significant patient disability. Little research has focused on the vein wall injury response to the thromboti...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章,评审
doi：10.1160/TH10-03-0183
更新日期：2010-10-01 00:00:00
abstract：:Fourteen patients diagnosed as having thrombotic thrombocytopenia purpura (TTP) were studied. Those who survived have been followed during a 1 to 7 year period. The clinical diagnosis was based on changing neurological findings, thrombocytopenia and evidence of microangiopathic hemolytic anemia. Laboratory tests inclu...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1988-08-30 00:00:00
abstract：:Sequential treatment of arterial occlusions of the leg with porcine plasmin and low dose streptokinase results in a strong systemic proteolysis as already seen in deep leg vein thrombosis. In 31 of 45 patients the blood flow through major arterial segments could be restored. Thrombolytic success is possible within the...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1982-10-29 00:00:00
abstract：:Hyperglycaemia impairs fibrinolytic activity on the surface of endothelial cells, but the underlying mechanisms are not fully understood. In this study, we tested the hypothesis that hyperglycaemia causes dysfunction of the endothelial membrane protein annexin A2, thereby leading to an overall reduction of fibrinolyti...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH12-12-0944
更新日期：2013-06-01 00:00:00
abstract：:Some classical hemophiliacs have a paradoxical hemostatic response to prothrombin complex concentrate (PCC). We hypothesized that vascular endothelial cells (EC) may contribute to this "factor VIII bypassing activity". When PCC were incubated with suspensions or monolayer cultures of EC, they acquired the ability to p...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1988-10-31 00:00:00
abstract：:Adhesion of rat blood platelets to native rat tail collagen fibrils was studied in the electron microscope under conditions that preserved collagen-associated proteoglycans (CAPG). The CAPG molecules were aligned in chain-like configurations that encircled the fibrils with a 65 nm period; they appeared to coat the fib...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1987-08-04 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：:Cysteinyl leukotrienes (i.e. LTC4, LTD4), produced by activated leukocytes or by transcellular metabolism may act at different levels on vascular smooth muscle cells (VSMC) during inflammatory process or atherosclerosis. We studied the effect of LTC4, LTD4, and LTE4 on the in vitro proliferation of rat VSMC, measured ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1996-07-01 00:00:00
abstract：:Molsidomine and its active metabolite SIN-1 were examined in humans and animals for platelet suppressant and fibrinolytic activities. Following oral administration of molsidomine at doses of 6 or 15 mg/kg to rabbits, their blood platelets in PRP ex vivo required higher threshold concentrations of ADP, AA and thrombin ...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1985-12-17 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：:The aim of the study was to compare the efficacy and safety of once-daily subcutaneous injection of dalteparin, a low molecular weight heparin, with that of intravenous unfractionated heparin in the treatment of deep venous thrombosis (DVT). Patients were included if they had deep venous thrombosis distal to inguinal ...
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：1996-08-01 00:00:00
abstract：:The use of exogenous oestrogen in women with otherwise unprovoked venous thromboembolism (VTE) could be considered sufficient explanation to classify VTE as provoked if the risk of recurrent VTE after 3-6 months of anticoagulant treatment is similar to the risk of recurrent VTE observed after a surgery or prolonged im...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章,多中心研究
doi：10.1160/TH09-10-0685
更新日期：2010-09-01 00:00:00
abstract：:Since megakaryocytes are the cellular precursors of platelets we have investigated whether they share responses to platelet agonists, in particular collagen. Although previous studies have reported responses to thrombin in non-human megakaryocytes, through studies of single cell calcium responses and protein tyrosine-...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1999-09-01 00:00:00
abstract：BACKGROUND: Evaluation of thromboembolic risk is essential in anticoagulated atrial fibrillation (AF) patients. The CHA2DS2-VASc score is largely validated and recommended by most guidelines. The GARFIELD-AF Stroke score has been proposed as an alternative risk score. METHODS: We analyzed warfarin-treated patients fro...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1055/a-1333-4448
更新日期：2020-12-09 00:00:00
abstract：:Tissue plasminogen activator (tPA) activity in blood and blood plasma has been difficult to determine because it is unstable, especially in subjects with high levels of plasminogen activator inhibitor type 1 (PAI-1). We have attempted to stabilize the tPA activity by collecting 9 volumes of blood in 1 volume acidic ci...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：
更新日期：1989-11-24 00:00:00
abstract：:We report for the first time that saliva of the hard tick and Lyme disease vector, Ixodes scapularis, is a potent inhibitor of angiogenesis. Saliva (< or = 1:500 dilutions) or salivary gland (0.1-0.5 pairs/assay) dose-dependently inhibits microvascular endothelial cell (MVEC) proliferation. Inhibition was also detecte...
journal_title：Thrombosis and haemostasis
pub_type： 杂志文章
doi：10.1160/TH04-09-0566
更新日期：2005-07-01 00:00:00
