Synthesis and hemocompatibility of amino (di-)butyldeoxy modified hydroxyethyl starch.

Cationic polymers are of interest as the basis for obtaining various biomaterials. Hydrophilic biopolymers and their modification products are of main interest. Biocompatibility is the prime criterion that makes this material usable for said purposes. In this research, hydroxyethyl starch (HES) was used as a basis for synthesis of aminodeoxy derivatives, containing n-butylamin (BA) and dibutylamin (DBA) fragments. Bromodeoxy HES was an intermediate compound. The structure of synthesized polymers was confirmed with NMR, elemental analysis and FTIR methods. The derivatives with 0.6 and 0.9 degree of substitution were tested for compatibility with blood. The research showed that HES base does not have an anticoagulation activity, does not affect human platelet aggregation and in concentrations up to 10 mg/mL of cell suspension in a buffer solution does not destroy red blood cell membrane, and therefore can be used as a component of drug delivery systems. Addition of aminodeoxy derivatives of HES hindered development of ADP-induced platelet aggregation. Derivatives of HES-DBA and HES-BA0.9 may also be of interest, but their concentration must not exceed 1 * 10 mg/mL of blood. Biodegradation of HES cationic derivatives were analyzed through identification of reducing sugars after treatment with amylase and pancreatin.