The effect of shear stress on the ability of tissue factorfactor VIIa complex to activate factor X in a continuous flow reactor was studied. Tissue factor immobilized in a phospholipid bilayer on the inner surface of a capillary tube was exposed to a perfusate containing factors VIIa and X flowing a
Fractal dimension analysis of factor X activation in the presence of tissue factor-factor viia complex in a continuous flow reactor
โ Scribed by Srikant Gir
- Publisher
- Springer Netherlands
- Year
- 1995
- Tongue
- English
- Weight
- 347 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0141-5492
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โฆ Synopsis
The characteristics of a phospholipid surface are of major importance in the activation of factor X in the presence of tissue factor-factor VIIa (TF-VIIa) complex. A possible tool which provides a measure of the surface corrugation and roughness is the fractal dimension analysis. This paper uses the fractal characterization of a phospholipid surface to develop a model for analyzing surface based enzymatic reaction data. The modeling indicates that the fractal dimension (D) of a phospholipid surface is a function of the wall shear rate. The results also indicate that the fractal dimension of the phospholipid surface decreases from approximately 2.9 to 1.4 as the wall shear rate increases from 50 to 1600 sec -I. At the same time the factor Xa production increases from 1.9 to 5.8 pmoles/(min, cm2).
The results of the fractal dimension analysis clearly indicates that the surface roughness of a phospholipid surface may have a significant effect on factor X activation.
๐ SIMILAR VOLUMES
Development of a double exponential model for determining the intrinsic kinetic parameters for factor X activation by tissue factor-factor VIIa (TF:VIIa) complex, during the complete course of the reaction in a flow reactor is described. The model data reveal that the factor X activation rate consta