Study of antigenotoxic effect of hydrophilic cryofractions of some tissue of cattle

In conditions of environmental distress and high anthropogenic load in agricultural activities, the task of maintaining the integrity of the animal genome arises. One way to solve this problem is to use drugs that have an antimutagenic effect. Pharmaceutical substances obtained from animal tissues are promising components of such drugs due to their antioxidant and radioprotective effects. In this regard, the purpose of this work was to study the genoprotective effect of hydrophilic cryofraction of the placenta (HCPC) and its mixture with hydrophilic cryofraction of the spleen of cattle (HCSPC) in mice with cytogenetic instability induced by the genotoxicant - mitomycin C (MMC). The genoprotective effect of the studied substances was assessed by reducing the frequency of micronuclei of polychromatophilic erythrocytes (MNPCE) in the bone marrow of mice after administration of MMC. The amount of damage in mitochondrial DNA (mtDNA) in mouse liver was also determined using quantitative polymerase chain reaction. As a result of the studies, it was established that HCPC and HCSPC did not exhibit toxic, mutagenic or DNA-damaging effects. A course of administration of HCPC and HCSPC caused a decrease in the frequency of MNPCE in the bone marrow of mice, with induced cytogenetic instability by 38.8 and 42.3% (p<0.05), relative to animals that were administered only MMC. With a course of administration of HCPC and HCSPC to mice that received MMC, a tendency was found to reduce the amount of mtDNA damage in the liver of mice. Thus, with a course of administration of HCSPC, a decrease in the amount of mtDNA damage was observed by 48.0% and 32.4% in two mtDNA fragments, respectively, relative to mice that were administered only MMC. Thus, with a course of administration of HCSPC, the tendency towards a DNAprotective effect was more pronounced relative to HCPC. These data indicate that HCPC and HCSPC have antimutagenic and DNA protective effects, which are more pronounced by HCSPC, probably due to the high antioxidant effect.