EVALUACIJA ANTIGENOTOKSIČNOG POTENCIJALA SALVIANOLIČNE KISELINE B U PRISUSTVU VODONIK-PEROKSIDA NA LEUKOCITIMA PERIFERNE KRVI IN VITRO. (Bosnian)

EVALUATION OF ANTIGENOTOXIC POTENTIAL OF SALVIANOLIC ACID B WITH HYDROGEN PEROXIDE ON HUMAN PERIPHERAL BLOOD LEUKOCYTES IN VITRO. (English)

Aim. Oxidative stress is a consequence of the increased production of free radicals that is caused by the disturbance in the balance of oxidation-reduction activity. Salvianolic acid B is a polyphenol compound, derived from the plant Salvia miltiorrhiza Bunge, which showed significant antioxidant properties. The aim of this study is the investigation of genotoxic potential of salvianolic acid B and evaluation of its antigenotoxic activity against the DNA damage induced by hydrogen peroxide in peripheral blood leukocytes in vitro, using the alkaline Comet assay. Materials and Methods. The evaluation of the ability of various concentrations of salvianolic acid B (12.5μM, 25μM and 50 μМ) to reduce the number of cells with DNA damage caused by hydrogen peroxide as an oxidant was performed under two experimental protocols: pretreatment and cotreatment, in order to determine antigenotoxicity on preventive and intervention levels. Results. Results indicate that the salvianolic acid B did not exhibit a genotoxic effect after 30 minutes of incubation, in the tested concentrations. In the pretreatment, a concentration of 50 μМ showed a significant decrease of the hydrogen peroxide induced DNA damage. Salvianolic acid B was more effective in reducing DNA damage in cotreatment, where concentrations of 25 μМ and 50 μМ demonstrated a significant abrogation of DNA damage. Protective effect of salvianolic acid B was dependent on the concentration. Conclusions. The results showed that salvianolic acid B has pronounced antigenotoxic effect on the intervention level, which makes it a potential agent in treatment of diseases in which oxidative DNA damage plays an important role. [ABSTRACT FROM AUTHOR]

Cilj. Oksidativni stres je posledica prekomerne produkcije slobodnih radikala i nastaje usled poremećaja u ravnoteži oksido-redukcionih procesa. Salvianolična kiselina B je polifenolno jedinjenje, poreklom iz biljke Salvia miltiorrhiza Bunge, koje je pokazalo značajna antioksidativna svojstva. Cilj rada bio je da se ispita genotoksični potencijal salvianolične kiseline B i izvrši evaluacija njene antigenotoksične aktivnosti na DNK oštećenja indukovana vodonik-peroksidom u leukocitima periferne krvi in vitro, primenom alkalnog Komet testa. Materijal i metode. Procenjena je sposobnost različitih koncentracija salvianolične kiseline B (12,5 μM, 25 μM i 50 μM) da redukuju broj ćelija sa DNK oštećenjem izazvanim vodonik-peroksidom kao oksidansom u okviru dva eksperimentalna protokola: pretretmana i kotretmana radi utvrđivanja antigenotoksičnosti na preventivnom i interventnom nivou. Rezultati. Rezultati su pokazali da salvianolična kiselina B, nakon 30 minuta inkubacije, nije ispoljila genotoksičan efekat u ispitivanim koncentracijama. U pretretmanu, koncentracija od 50 μM pokazala je značajnu redukciju DNK oštećenja indukovanih vodonik-peroksidom. Salvianolična kiselina B bila je efikasnija u redukciji DNK oštećenja u kotretmanu, gde su koncentracije od 25 μM i 50 μM pokazale značajan efekat redukcije nivoa DNK oštećenja. Pokazani protektivni efekat salvianolične kiseline B zavisio je od koncentracije. Zaključak. Dobijeni rezultati pokazali su da salvianolična kiselina B ima izraženiji antigenotoksični efekat na interventnom nivou, što je čini potencijalnim agensom za primenu kod oboljenja u kojima oksidativna DNK oštećenja imaju važnu ulogu. [ABSTRACT FROM AUTHOR]

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