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DC Field | Value | Language |
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dc.contributor.author | Van Veen, Joost J. | - |
dc.contributor.author | Gatt, Alexander | - |
dc.contributor.author | Cooper, Peter C. | - |
dc.contributor.author | Kitchen, Steven | - |
dc.contributor.author | Bowyer, Annette E. | - |
dc.contributor.author | Makris, Mike | - |
dc.date.accessioned | 2022-11-08T14:31:17Z | - |
dc.date.available | 2022-11-08T14:31:17Z | - |
dc.date.issued | 2008 | - |
dc.identifier.citation | Van Veen, J. J., Gatt, A., Cooper, P. C., Kitchen, S., Bowyer, A. E., & Makris, M. (2008). Corn trypsin inhibitor in fluorogenic thrombin-generation measurements is only necessary at low tissue factor concentrations and influences the relationship between factor VIII coagulant activity and thrombogram parameters. Blood Coagulation & Fibrinolysis, 19(3), 183-189. | en_GB |
dc.identifier.uri | https://www.um.edu.mt/library/oar/handle/123456789/103504 | - |
dc.description.abstract | The fluorogenic calibrated automated thrombin-generation assay is influenced by contact pathway activation in plateletrich and platelet-poor plasma. This influence lessens with increasing tissue factor (TF) concentrations and is inhibited by corn trypsin inhibitor (CTI). CTI is expensive and at what TF concentration its influence becomes irrelevant is unclear. Spiking of factor VIII (FVIII)-depleted plasma with FVIII, in samples without CTI, shows a plateau of thrombin generation at low normal FVIII levels. Given the association with thrombosis at high levels, a continuing increase in thrombin generation would be expected. We studied the effect of CTI on this relation by spiking experiments up to 4.8 IU/ml at 1 pmol/l TF and compared the influence of CTI at 1 and 5 pmol/l in platelet-poor plasma. CTI significantly influences thrombin generation in platelet-poor plasma at 1 pmol/l TF (difference of means for endogenous thrombin potential of 232.5 nmol/l per min, P<0.0001) and peak of 48 nmol/l (P<0.0001)) but not at 5 pmol/l. Spiking experiments without CTI confirm the hyperbolic relation between FVIII coagulant activity (FVIII:C) and endogenous thrombin potential with a plateau at 0.70–1.40 IU/ml. With CTI, a near-linear response up to 1.0 IU/ml was found with a plateau at 2.4–4.8 IU/ml. For peak thrombin, no plateau was reached with CTI. The present study confirms and extends previous data on CTI and the relationship between FVIII:C and thrombin generation. CTI is not necessary at 5 pmol/l TF, and thrombin generation remains dependent on FVIII:C up to 4.8 IU/ml at 1 pmol/l with CTI. Higher levels than previously thought may be needed to normalize thrombin generation. | en_GB |
dc.language.iso | en | en_GB |
dc.publisher | Lippincott Williams & Wilkins | en_GB |
dc.rights | info:eu-repo/semantics/restrictedAccess | en_GB |
dc.subject | Trypsin inhibitors | en_GB |
dc.subject | Thrombin -- Physiological effect | en_GB |
dc.subject | Blood -- Coagulation | en_GB |
dc.subject | Blood coagulation factor VIII antibodies | en_GB |
dc.title | Corn trypsin inhibitor in fluorogenic thrombin-generation measurements is only necessary at low tissue factor concentrations and influences the relationship between factor VIII coagulant activity and thrombogram parameters | en_GB |
dc.type | article | en_GB |
dc.rights.holder | The copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder. | en_GB |
dc.description.reviewed | peer-reviewed | en_GB |
dc.identifier.doi | 10.1097/MBC.0b013e3282f4bb47 | - |
dc.publication.title | Blood Coagulation & Fibrinolysis | en_GB |
Appears in Collections: | Scholarly Works - FacM&SPat |
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