Sep 1, 1989

Contributions of negatively charged chemical groups to the surface-dependent activation of human plasma by soluble dextran derivatives

Biomaterials
J M NigrettoM Jozefowicz

Abstract

Negatively charged surfaces are known to promote contact activation. The mechanism responsible for increasing affinity for surfaces is not yet quite understood, although the presence of negative charge densities is thought to be a prerequisite. With the availability of soluble dextran derivatives, varyingly substituted with charged methylcarboxylate, methylbenzylamide sulphonate and uncharged methylbenzylamide residues, we were able to discriminate between the contributions of these chemical moieties to contact activation, thus suggesting that the stimulating properties of synthetic negatively charged surfaces should also be described in terms of specific interactions instead of global negative charge density. This could be effected by quantifying the activating capacities as a function of the chemical group composition. A direct correlation linking activating capacities to anticoagulant properties has been observed.

Mentioned in this Paper

Human plasma
Surface Properties
Adsorption
Soluble
Polymers
Dextrans
Blood Coagulation
Hemocompatible Materials
Anti-coagulant [EPC]
Chemical group

About this Paper

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