Abstract:
:Five expert laboratories have participated in a cross-laboratory study to co-evaluate and compare three commercial Factor VIII/von Willebrand factor (VWF) concentrates. A total of nine factor concentrate lots were evaluated, comprising AHF (High Purity) (AHF HP; x3), Biostate (x3) and Humate/Haemate (x3). All laboratories blind tested for FVIII: C, VWF: Ag and VWF: CB, four tested for VWF: RCo, and one performed VWF: Multimers. The study yielded inter-laboratory CVs for VWF: Ag and FVIII:C around 10-15%, and for VWF:CB and VWF:RCo around 20%, significantly lower than those of previous multi-laboratory surveys. All three lots of AHF HP contained in the vicinity of 25 U/ml FVIII:C, around 60-75 U/ml of VWF:Ag, but only 30-45 U/ml of VWF:CB and 40-50 U/ml of VWF:RCo (thus, CB/Ag ratio around 0.5-0.6 and RCo/Ag ratio around 0.6-0.7). Study determined that FVIII: C and VWF: RCo levels were similar to manufacturer assigned levels. Some loss of the high molecular weight (HMW) multimers was observed, together with an intense low molecular weight (LMW) VWF band consistent with some reduction or proteolysis of HMW VWF. All three lots of Humate/Haemate contained in the vicinity of 23-32 U/ml of FVIII:C, 70-105 U/ml of VWF: Ag, 50-90 U/ml of VWF: CB and VWF: RCo (i.e. CB/Ag ratio around 0.6-0.9 and RCo/Ag ratio around 0.6-1.1). Study-determined FVIII: C and VWF: RCo levels were similar to manufacturer-assigned levels. The LMW multimer band seen with AHF HP was also observed with Humate/Haemate. All three lots of Biostate contained in the vicinity of 40-55 U/ml of FVIII:C, 105-170 U/ml of VWF:Ag, 90-150 U/ml of VWF:CB, and 90-135 U/ml of VWF:RCo (i.e. CB/Ag and RCo/Ag ratios around 0.7-1.0). Study-determined FVIII:C levels were similar to manufacturer-assigned levels. The LMW multimer band seen with AHF HP was not observed with Biostate. The defined pattern of increasing CB/ Ag from AHF HP to Humate/Haemate and Biostate was consistently observed in study data from each of the five laboratories. In conclusion, study findings indicate some differences in the retention of functional/ HMW VWF between factor concentrates, and this is expected to have significant implications in terms of clinical efficacy for therapy in VWD.
journal_name
Thromb Haemostjournal_title
Thrombosis and haemostasisauthors
Favaloro EJ,Bukuya M,Martinelli T,Tzouroutis J,Duncan E,Welldon K,Collecutt M,Aumann H,Thom J,Gilmore Gkeywords:
subject
Has Abstractpub_date
2002-03-01 00:00:00pages
466-76issue
3eissn
0340-6245issn
2567-689Xjournal_volume
87pub_type
杂志文章abstract::Meseclazone and its major metabolite, 5-chlorosalicylic acid (5-CSA) have been shown to possess anti-inflammatory, analgesic and antipyretic activity. The comparative effects of these compounds on pletelet aggregation were evaluated in vitro and ex vivo with acetylsalicylic acid (ASA). In vitro, meseclazone and ASA ex...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
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更新日期:1978-08-31 00:00:00
abstract::Warfarin induction is accomplished by titrating dosage to coagulation test results. Algorithms can guide this process but not identify the starting dose. We hypothesized that an initial warfarin dose approximating the maintenance value would safely enhance rapidity of induction. In a randomized trial we compared a fix...
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:2003-02-01 00:00:00
abstract::Thrombus formation at an artificial surface in contact with blood is a complex process that encompasses accretion of platelets from flowing blood and fibrin deposition. Platelet adhesion and fibrin formation are intimately intertwined reactions that are triggered by different sets of surface adsorbed plasma proteins. ...
journal_title:Thrombosis and haemostasis
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abstract::Mechanisms linking deep vein thrombosis (DVT) and subclinical atherosclerosis and risk of cardiovascular events are poorly understood. The aim of this study was to investigate the potential impact of CX3CR1/CX3CL1 axis in DVT-associated endothelial dysfunction. The study included 22 patients (age: 37.5 ± 8.2 years) wi...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1055/s-0038-1629897
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
doi:
更新日期:1997-01-01 00:00:00
abstract::The incidence of newly diagnosed malignancy is increased in patients with unexplained venous thromboembolism during the first year after a thromboembolic event in comparison to controls (odds ratio, 3.9-36). Extensive screening with computed tomography, endoscopy and tumor markers can identify most of these undetected...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,评审
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更新日期:1997-07-01 00:00:00
abstract::In a group of 705 healthy middle-aged men, we have examined the relationship between plasma levels of Factor VII (FVII) c and Factor VII antigen (FVIIag) and two polymorphisms in the FVII gene. One polymorphism alters arginine at position 353 to glutamine (R/Q), and the other is the result of a 10 base pair (bp) inser...
journal_title:Thrombosis and haemostasis
pub_type: 临床试验,杂志文章
doi:
更新日期:1996-04-01 00:00:00
abstract::The ability of cellular fibronectin, found in the vessel wall in a fibrillar conformation, to regulate platelet functions and trigger thrombus formation remains largely unknown. In this study, we evaluated how parietal cellular fibronectin can modulate platelet responses under flow conditions. A fibrillar network was ...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH14-11-0958
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journal_title:Thrombosis and haemostasis
pub_type: 临床试验,杂志文章
doi:
更新日期:1990-06-28 00:00:00
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journal_title:Thrombosis and haemostasis
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更新日期:2001-11-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH14-01-0024
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2000-03-01 00:00:00
abstract::Knowledge on the natural history of mesenteric vein thrombosis (MVT) and of the efficacy and safety of long-term oral anticoagulant therapy (OAT) in this setting is based on small uncontrolled series of patients with a limited follow-up. It was the aim of the study to assess the natural history of MVT in a cohort of p...
journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,多中心研究
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1990-04-12 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH16-09-0716
更新日期:2017-01-26 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1984-04-30 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1994-08-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1996-08-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2000-07-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2000-09-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1994-09-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1991-05-06 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:10.1160/TH05-02-0089
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1999-11-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2008-11-01 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章,已发布勘误
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更新日期:2017-04-03 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1993-01-11 00:00:00
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:1999-12-01 00:00:00
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journal_title:Thrombosis and haemostasis
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journal_title:Thrombosis and haemostasis
pub_type: 杂志文章
doi:
更新日期:2006-05-01 00:00:00