In vitro evaluation of the haemostatic value of the LFB‐von Willebrand factor concentrate
Identifieur interne : 001365 ( Istex/Checkpoint ); précédent : 001364; suivant : 001366In vitro evaluation of the haemostatic value of the LFB‐von Willebrand factor concentrate
Auteurs : Mazurier [France]Source :
- Haemophilia [ 1351-8216 ] ; 1998-11.
English descriptors
- Teeft :
- Agarose, Assay, Blackwell science, Cofactor, Cryoprecipitate, Different fractions, Different lots, Electrophoretic, Factor viii, Functional integrity, Fviii, Goudemand, Haemophilia, Haemostatic, Haemostatic value, High purity, Laboratoire francais, Mazurier, Multimeric, Multimeric pattern, Multimers, Native plasma, Normal plasmas, Platelet, Platelet adhesion, Preclinical, Preclinical development, Quality control, Quantitative evaluation, Rectangular perfusion chamber system, Ristocetin, Ristocetin cofactor activity, Suppl, Therapeutic lots, Thromb, Thromb haemost, Various multimers, Viii, Willebrand, Willebrand disease, Willebrand disease patients, Willebrand factor.
Abstract
The structural and functional studies of the concentrate of von Willebrand factor (vWF) manufactured by LFB have been first performed as part of the preclinical development of this product specially intended for the treatment of von Willebrand disease. The electrophoretic analyses showed the high purity of LFB‐vWF concentrate (specific activity of 100 IU of ristocetin cofactor activity per milligram of protein) and the multimeric pattern attesting the presence of high molecular weight multimeters (≥15‐mers). The measurements of vWF capacity to bind to: (1) platelet glycoprotein (GP) Ib in the presence of ristocetin; (2) GPIIb/IIIa in the presence of thrombin; (3) types I and III collagen; (4) factor VIII (FVIII) gave evidence that the functional activity of purified vWF was similar to that of native plasma vWF. Furthermore the LFB‐vWF concentrate was able to promote platelet adhesion to collagen. The release of the therapeutic batches of this product rely presently on their potency measured with the ristocetin cofactor activity (40–70 IU ml−1) and the quantitative evaluation of vWF multimeric distribution studied using electrophoresis in 1.5% agarose. These validated techniques ensure the consistency and haemostatic properties of the different lots of LFB‐vWF concentrate.
Url:
DOI: 10.1046/j.1365-2516.1998.0040s3040.x
Affiliations:
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<term>Cryoprecipitate</term>
<term>Different fractions</term>
<term>Different lots</term>
<term>Electrophoretic</term>
<term>Factor viii</term>
<term>Functional integrity</term>
<term>Fviii</term>
<term>Goudemand</term>
<term>Haemophilia</term>
<term>Haemostatic</term>
<term>Haemostatic value</term>
<term>High purity</term>
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<term>Normal plasmas</term>
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<term>Platelet adhesion</term>
<term>Preclinical</term>
<term>Preclinical development</term>
<term>Quality control</term>
<term>Quantitative evaluation</term>
<term>Rectangular perfusion chamber system</term>
<term>Ristocetin</term>
<term>Ristocetin cofactor activity</term>
<term>Suppl</term>
<term>Therapeutic lots</term>
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<term>Thromb haemost</term>
<term>Various multimers</term>
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<front><div type="abstract" xml:lang="en">The structural and functional studies of the concentrate of von Willebrand factor (vWF) manufactured by LFB have been first performed as part of the preclinical development of this product specially intended for the treatment of von Willebrand disease. The electrophoretic analyses showed the high purity of LFB‐vWF concentrate (specific activity of 100 IU of ristocetin cofactor activity per milligram of protein) and the multimeric pattern attesting the presence of high molecular weight multimeters (≥15‐mers). The measurements of vWF capacity to bind to: (1) platelet glycoprotein (GP) Ib in the presence of ristocetin; (2) GPIIb/IIIa in the presence of thrombin; (3) types I and III collagen; (4) factor VIII (FVIII) gave evidence that the functional activity of purified vWF was similar to that of native plasma vWF. Furthermore the LFB‐vWF concentrate was able to promote platelet adhesion to collagen. The release of the therapeutic batches of this product rely presently on their potency measured with the ristocetin cofactor activity (40–70 IU ml−1) and the quantitative evaluation of vWF multimeric distribution studied using electrophoresis in 1.5% agarose. These validated techniques ensure the consistency and haemostatic properties of the different lots of LFB‐vWF concentrate.</div>
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