Abstract
Triterpenoids are natural, biologically active compounds extracted from many plants. They possess antiinflammatory, anticancer, and antioxidant properties. In the report presented, antiproliferative effects and leukemia cell growth and apoptosis modulating activities of ursolic acid (UA) and oleanolic acid (OA) were investigated. Both triterpenoids are inhibitors of leukemia cell growth and inductors of apoptosis. However, when applied in combination with anthracycline antitumor antibiotic doxorubicin (Dox), UA and OA diversely modulate therapeutic efficacy of Dox, due to different antioxidant activities. Compare to OA showing synergism/additive effect with Dox, UA (stronger antioxidant) acts antagonistically and reduces leukemia cell growth inhibiting and differentiation effects induced by Dox. In conclusion, these findings suggest that although triterpenoids UA and OA can induce apoptosis, their antioxidant activities can interfere with the therapeutic effect of antitumor antibiotic Dox which mechanism of action is attributed to the production of reactive oxygen species.
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This investigation was supported by the Slovak Grant Agency VEGA, grant number 2/4056/24 and by the Slovak Agency for Science and Technology, grant number APVT-20-002604.
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Cipak, L., Grausova, L., Miadokova, E. et al. Dual activity of triterpenoids: apoptotic versus antidifferentiation effects. Arch Toxicol 80, 429–435 (2006). https://doi.org/10.1007/s00204-006-0072-6
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DOI: https://doi.org/10.1007/s00204-006-0072-6