Chalcone methoxy derivatives exhibit antiproliferative and proapoptotic activity on canine lymphoma and leukemia cells

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Abstract

Chalcones are interesting candidates for anti-cancer drugs due to the ease of their synthesis and their extensive biological activity. The study presents antitumor activity of newly synthesized chalcone analogues with a methoxy group on a panel of canine lymphoma and leukemia cell lines. The antiproliferative effect of the 20-hydroxychalcone and its methoxylated derivatives was evaluated in MTT assay after 48 h of treatment in different concentrations. The proapoptotic activity was studied by cytometric analysis of cells stained with Annexin V/FITC and propidium iodide and by measure caspases 3/7 and 8 activation. The DNA damage was evaluated by Western blot analysis of phosphorylated histone H2AX. The new compounds had selective antiproliferative activity against the studied cell lines, the most effective were the 20-hydroxy-200,500-dimethoxychalcone and 20-hydroxy-40,60-dimethoxychalcone. 20-Hydroxychalcone and the two most active derivatives induced apoptosis and caspases participation, but some percentage of necrotic cells was also observed. Comparing phosphatidylserine externalization after treatment with the different compounds it was noted that the addition of two methoxy groups increased the proapoptotic potential. The most active compounds triggered DNA damage even in the cell lines resistant to chalcone-induced apoptosis. The results confirmed that the analogues could have anticancer potential in the treatment of canine lymphoma or leukemia.

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Pawlak, A., Henklewska, M., Suárez, B. H., Łużny, M., Kozłowska, E., Obmińska-Mrukowicz, B., & Janeczko, T. (2020). Chalcone methoxy derivatives exhibit antiproliferative and proapoptotic activity on canine lymphoma and leukemia cells. Molecules, 25(19). https://doi.org/10.3390/molecules25194362

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