Oligomerization of ß-Like DNA Polymerases in the Presence of Fe2+ Ions.

This work presents data on the relationship between the oligomeric state and catalytic activity of ß-like DNA polymerases isolated from three cancer cell lines upon replacement of magnesium ions with iron. It was shown that the suppression of the catalytic activity of ß-like DNA polymerases in the presence of divalent iron ions is related to enzyme oligomerization that can be responsible for the suppression of the magnetic isotope effect.

Radiation-Chemical Biotechnology for Producing Ultrashort (50-100n) Single-Chain Polydeoxyribonucleotides with Anticancer Activity.

The fundamental possibility of obtaining ultrashort (50n-100n) single-stranded polydeoxyribonucleotides by the method of radiation-chemical destruction of total yeast DNA was established and their anticancer activity was shown.

L, D-Polydeoxyribonucleotides to provide an essential inhibitory effect on DNA polymerase ß of human myeloid leukemia HL60 cells.

The inhibitory effect of D and L-polynucleotides of a given length (40-50n) on the catalytic activity of DNA polymerase ß isolated from chromatin cells of acute myeloid leukemia HL-60 was evaluated. The synthesized L enantiomer was found to have a higher inhibitory activity than the synthesized and isolated D enantiomers of polynucleotides. The work also proposes a biophysical model that describes this effect.

Calcium Salt of N-(5-Hydroxynicotinoyl)-L-Glutamic Acid Weakens Depressive-Like Behavior and Parkinsonian Syndrome in Experiment on Rodents.

We studied antidepressant and antiparkinsonian properties of N-(5-hydroxynicotinoyl)-Lglutamic acid calcium salt (Ampasse) in rodents. It was found that Ampasse in a dose of 30 mg/kg exhibited antidepressant activity in the forced swimming test in mice and in a dose of 0.1 mg/kg maximally alleviates the symptoms of parkinsonian syndrome induced by systemic administration of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine in C57Bl/6 mice, and haloperidol-induced catalepsy in rats.

Protective Properties of Lanthanum Nitrate against Pathogens with Various Morphological and Functional Properties.

Dose-dependent protective effects of lanthanum nitrate solution and gel were shown on the model of experimental infection caused by a virulent strain of Shigella flexneri 2a or opportunistic bacteria Klebsiella pneumoniae in outbred and DBA mice.