Structural Changes in the Lungs and Liver of Mice with Experimental Tuberculosis Treated with Liposome-Encapsulated Dextrazide.

Male BALB/с mice were intravenously infected with Mycobacterium tuberculosis H37Rv (0.5 ml of 2-week culture). One month later, treatment with liposome-encapsulated dextrazide (LEDZ, a conjugate of isonicotinic acid hydrazide (INH) and 40 kDa oxidized dextran encapsulated in phosphatidylcholine liposomes), INH, or a combination of LEDZ with INH was started.

Sequencing of the VP1-2A Genome Segment for Hepatitis A Subtyping.

Unlabelled: was to improve the VP1-2A sequencing method and facilitate the hepatitis A virus genotyping technique.

Materials And Methods: Nucleic acids were extracted by using commercial kits for nucleic acid extraction and reverse transcription in a manual and automatic version. Primer sequences were selected using the DNASTAR software.

Study of Antiviral Efficiency of Oxidized Dextrans In Vitro and In Vivo.

Antiviral efficiency of oxidized dextrans (OD) with different molecular weights and oxidation degree (OD40min, OD70min, OD40max, and OD70 max) was studied in vitro and in vivo. Dextrans OD40max and OD70max prevented the development of the cytopathic effect of influenza A(H1N1)pdm09 virus in more than 50% MDCK cells vs. control (no OD).

[STUDYING THE ACUTE TOXICITY OF DEXTRAN POLYALDEHYDE CONJUGATE WITH ISONICOTINIC ACID HYDRAZIDE.].

The acute toxicity of a new antubercular drug, dextran polyaldehyde conjugate with isonicotinic acid hydrazide (dextrazide), has been studied on animals, HepaRG cell line, and FRSN human skin fibroblasts. Average tolerable doses (LD(10), LD(16)), half-lethal doses (LD(50)), and lethal doses (LD(84)) of dextrazide have been determined for intraperitoneal introduction in mice and rats and intravenous injection in rabbits.

Experimental study of the efficiency of oxidized dextran for prevention of influenza A/H5N1.

Oxidized dextran is suggested for prevention of infection induced by influenza A/H5N1 viruses, methods of its use and doses are determined. Two intravenous injections of dextran 3 and 1 days before experimental infection of outbred mice by influenza A/H5N1 A/goose/Krasnoozerskoye/627/05 virus resulted in a high preventive dose-dependent effect: the mean lifespan was 25% prolonged, the mortality decreased 3-fold.