[Synthesis and immunomodulating activity of new diglycopeptides of of glycyrrhizinic acid and it's 30-methyl ester].

New amino acid derivatives of glycyrrhizic acid and its methyl ester were selectively synthesized using active N-succinimide esters. The compounds with residues of glycine ethyl ester and alanine methyl and butyl esters increased the level of agglutinins and hemolysins in blood serum of mice two- to threefold in comparison with the control upon parenteral administration at a dose of 2 mg/kg for 14 days. The English version of the paper: Russian Journal of Bioorganic Chemistry, 2004, vol.

[Synthesis and immunostimulating activity of cysteine-containing glycopeptide derivatives of glycyrrhizic acid].

New cysteine-containing derivatives of glycyrrhizic acid were synthesized by its coupling with Cys(Bzl) esters or the Cys(Bzl)-Val-OBu(t) dipeptide by the active ester method (DCC/HOSu) or by Woodward's reagent K. The derivatives with Cys(Bzl) and Cys(Bzl)-Val residues attached to the carbohydrate part of the molecule stimulated the primary immune response and the reaction of delayed-type hypersensitivity in mice at a dose of 2 mg/kg. The English version of the paper: Russian Journal of Bioorganic Chemistry, 2004, vol.

[A toxicological study of a phytopreparation made from an extract of alfalfa (Medicago sativa)].

A phytopreparation from lucerne (Medicago sativa) was studied with respect to the acute and chronic toxicity and the action upon the cellular genetic mechanism. It was found that the preparation belongs to the group of practically nontoxic properties.

[The immunotropic activity of erakond].

The effect of eracond on some parameters of immunity and allergic reactions was studied in experiments on mice and guinea pigs. The drug was found to possess an immunomodulating effect.

[The hepatoprotective and cholagogic action of glycyrrhizic acid derivatives].

The experiments on rats with toxic hepatic damage induced by tetrachloromethane have shown that the derivatives of glycyrrhizinic acid (5NGA) promote a decrease in the rate of lipid peroxide oxygenation in the hepatic tissue homogenate and the blood serum, in the inhibition of organospecific enzyme activity (BHMT, ALT, AST) and increase in choleresis. The data obtained testify to the hepatoprotective activity of the derivatives of glycyrrhizinic acid.