ABSTRACT
A biologically active composition of chitosan-selenium nanoparticles has been developed. Selenium nanoparticles are characterized by a clear bimodal size distribution: 2-3 and ~37 nm. The main active centers of complexation with nanoparticles are the amino and hydroxyl groups of chitosan. In experiments on culturing fibroblasts of the hTERT BJ-5ta cell line on sample films, high biocompatibility of the composition was shown. It was shown that the composition of chitosan-selenium nanoparticles has a corrective effect on the oxidative processes of the body, reducing the activity of free-radical oxidation in the blood of animals. This opens up prospects for the use of this complex in the composition of antioxidant and adaptogenic drugs.
ABSTRACT
Macrophage migration inhibitory factor (MIF) is a key proinflammatory cytokine. Inhibitors of tautomerase activity of MIF are perspective antiinflammatory compounds. Ceruloplasmin, the copper-containing ferroxidase of blood plasma, is a noncompetitive inhibitor of tautomerase activity of MIF in the reaction with p-hydroxyphenylpyruvate. Small-angle X-ray scattering established a model of the complex formed by MIF and ceruloplasmin. Crystallographic analysis of MIF with a modified active site supports the model. The stoichiometry of 3 CP/MIF trimer complex was established using gel filtration. Conformity of novel data concerning the interaction regions in the studied proteins with previous biochemical data is discussed.
