Abstract:
:Venous thromboembolic (VTE) complications in children and adolescents with acute lymphoblastic leukaemia (ALL) and T or B cell lymphoblastic lymphoma (T/B cell LL) can result not only in life-threatening acute complications but also contribute to significant long-term sequelae. The PREVAPIX-ALL study is an open-label randomized controlled study comparing outcomes of treatment with prophylactic dose apixaban versus no anticoagulation (standard of care) in children and adolescents with ALL and T/B cell LL receiving standard induction chemotherapy with asparaginase and the presence of a central venous access device. On day 29 of induction, all patients undergo screening imaging with duplex ultrasonography and echocardiography. The primary efficacy endpoint of the study is a composite of symptomatic and asymptomatic VTE that includes deep vein thrombosis, pulmonary embolism, cerebral sinovenous thrombosis or VTE-related death. The primary safety outcome is major bleeding. Secondary outcomes are central line-associated infections, patency and line replacement, superficial thrombosis, arterial events and death. A planned sample size of 500 randomized paediatric patients enrolled over a period of 5 years is based on the estimation of VTE rates of 20 and 10% in the standard of care and apixaban groups, respectively. An optional biomarker study in 150 patients will examine predictors of increased VTE risk and study in vivo anticoagulant effects of apixaban in children by measuring specific biomarkers in the haemostatic system and inflammatory pathway. This study will provide valuable information for the safety and efficacy of apixaban in VTE prevention during induction in paediatric ALL.
journal_name
Thromb Haemostjournal_title
Thrombosis and haemostasisauthors
O'Brien SH,Li D,Mitchell LG,Hess T,Zee P,Yee DL,Newburger JW,Sung L,Rodriguez Vdoi
10.1055/s-0039-1679938subject
Has Abstractpub_date
2019-05-01 00:00:00pages
844-853issue
5eissn
0340-6245issn
2567-689Xjournal_volume
119pub_type
杂志文章,多中心研究,随机对照试验abstract::The evidence is reviewed and a model presented for two distinct receptors being involved in platelet activation induced by alpha-thrombin: a high affinity thrombin receptor constituting approximately 50 copies of a supercomplexed form of GPIb coupled to phospholipase A2 and a moderate affinity receptor constituting ap...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:
更新日期:1997-07-01 00:00:00
abstract::We have tried to offer a unifying hypothesis tying vessel wall narrowing in atherosclerotic plaques to plaque rupture and healing (Fig. 7). This hypothesis is supported by evidence that smooth muscle cells are capable of interacting with a fibrin clot, specifically contracting a fibrin clot, and that inhibition of coa...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:
更新日期:1999-08-01 00:00:00
abstract::Antithrombin (AT) is a native plasma protein that acts as the main inhibitor of enzymes generated by the coagulation cascade. In extreme thrombotic conditions, consumption of plasma AT can make treatment with AT-associated heparin therapies less effective. Supplementation with recombinant human AT (rhAT) has shown pro...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH09-01-0062
更新日期:2009-08-01 00:00:00
abstract::Vitamin K-dependent proteins are currently purified from pooled human plasma or produced in mammalian cell culture systems by recombinant DNA technology. Transgenic animals may provide an additional expression system for the production of these therapeutic proteins. Mice have been used to test hybrid genes which direc...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:
更新日期:1997-07-01 00:00:00
abstract::Vascular endothelial growth factor (VEGF) is a potent mitogen for endothelial cells and plays a central role in angiogenesis and vasculogenesis. Therefore, VEGF and its receptors VEGFR-1 and VEGFR-2 are prime targets for anti-angiogenic intervention which is thought to be one of the most promising approaches in cancer...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH03-02-0106
更新日期:2003-09-01 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
abstract::Current thrombolytic strategies have a number of important shortcomings including resistance to recanalization and development of acute reocclusion. The purpose of this study was to investigate whether the lysis of venous thrombi by streptokinase could be enhanced by SR 46349, a novel 5-HT2 receptor antagonist, or clo...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1993-03-01 00:00:00
abstract::Increased fibrinogen concentration is a well known phenomenon following acute ischemic stroke. However, the natural course of this hyperfibrinogenemia is uncertain. We aimed to clarify whether it is of a transient or more persistent nature in patients who harbor an underlying morbid biology of atherothrombo-inflammati...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH07-08-0484
更新日期:2008-01-01 00:00:00
abstract::We reported previously that plasma fibrinogen was significantly higher in U.S. Caucasians than in Japanese, which may contribute to the higher mortality rate of coronary heart disease in the United States than in Japan. To examine the contribution of genetic variations to the race difference in plasma fibrinogen level...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1995-01-01 00:00:00
abstract::Thrombocytopenia and platelet dysfunction induced by extracorporeal blood circulation are thought to contribute to postsurgical bleeding complications in neonates undergoing cardiac surgery with cardiopulmonary bypass (CPB). In this study, we examined how changes in platelet function relate to changes in platelet coun...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1055/s-0039-1700517
更新日期:2020-01-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1982-12-27 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:10.1160/TH04-05-0324
更新日期:2004-08-01 00:00:00
abstract::Catabolism of coagulation factor VIII (FVIII) is mediated by low-density lipoprotein receptor-related protein (LRP). The ligand-binding sites of LRP are formed by complement-type repeats (CR), and CR clusters II and IV bind most of LRP ligands. FVIII contains two major LRP-binding sites located in the A2 and A3 domain...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2007-12-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH12-06-0395
更新日期:2013-02-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1994-12-01 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
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1979-06-30 00:00:00
abstract::We have established a new, enzyme-linked immunosorbent assay (ELISA) for the detection of ADAMTS13 antigen using purified polyclonal rabbit anti-human ADAMTS13 IgG. Normal plasma ADAMTS13 antigen levels span a concentration of 740-1420 ng/ml (median 1080 ng/ml) resulting in an ADAMTS13 activity to antigen ratio of 0.4...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH05-08-0550
更新日期:2006-02-01 00:00:00
abstract::In this study, the clot accumulation properties of liposome-coupled plasminogen were compared to those of free (non-liposomal) plasminogen in an in vitro, closed-loop, flow-system. After introduction of a clot into the closed system, double-radiolabelled plasminogen-liposomes were administered and the accumulation of ...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:10.1160/TH14-04-0298
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH11-04-0240
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH04-02-0122
更新日期:2004-09-01 00:00:00
abstract::Cystic fibrosis (CF) is characterized by a persistent inflammatory state, which can be secondary to chronic pulmonary infection and may affect vascular endothelium. We measured circulating levels of von Willebrand factor (vWF), tissue-plasminogen activator (t-PA), and P-selectin in 20 CF patients and 20 healthy subjec...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2001-12-01 00:00:00
abstract::By the use of a fluorogenic thrombin substrate and continuous calibration of each individual sample, it is now possible to obtain a thrombin generation (TG) curve (or thrombogram) in plasma, with or without platelets, in an easy routine procedure at high throughput and with an acceptable experimental error (<5%). Evid...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:
更新日期:2006-11-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2000-11-01 00:00:00
abstract::We analyzed the protein C gene (PROC) with the denaturing gradient gel electrophoresis (DGGE) scanning strategy in a series of 129 patients with suspected protein C (PC) deficiency (93 with low plasma PC levels and 36 with borderline level). At least one sequence variation was found in 104 of the 129 patients. Thirty-...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2000-01-01 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::In hereditary angioedema (HAE), normal C1-inhibitor (C1-INH) is low and the contact system activated. Recently, the findings of a tissue factor mutant selectively deficient in promoting the conversion of FVII to FVIIa, but with retained cofactor for FVIIa, made it possible to examine reliably the pre-existing content ...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1995-10-01 00:00:00
abstract::The influence of changes in liver blood flow on the clearance of rt-PA was studied both in healthy subjects and in a perfused rat liver model. Liver blood flow in healthy subjects was documented indirectly by the clearance of indocyanine green (ICG). Exercise reduced liver blood flow on average by 57% with a 95% confi...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1992-01-23 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1989-11-24 00:00:00