Polyphenols, secondary metabolites of plants, exhibit different anti-cancer and cytoprotective properties such as anti-radical, anti-angiogenic, anti-inflammation, or cardioprotective. Some of these activities could be linked to modulation of miRNAs expression. MiRNAs play an important role in posttranscriptional regulation of their target genes that could be important within cell signalling or preservation of cell homeostasis, e.g., cell survival/apoptosis. We evaluated the influence of a non-toxic concentration of taxifolin and quercetin on the expression of majority human miRNAs via Affymetrix GeneChip™ miRNA 3.0 Array. For the evaluation we used two cell models corresponding to liver tissue, Hep G2 and primary human hepatocytes. The array analysis identified four miRNAs, miR-153, miR-204, miR-211, and miR-377-3p, with reduced expression after taxifolin treatment. All of these miRNAs are linked to modulation of ZEB2 expression in various models. Indeed, ZEB2 protein displayed upregulation after taxifolin treatment in a dose dependent manner. However, the modulation did not lead to epithelial mesenchymal transition. Our data show that taxifolin inhibits Akt phosphorylation, thereby diminishing ZEB2 signalling that could trigger carcinogenesis. We conclude that biological activity of taxifolin may have ambiguous or even contradictory outcomes because of non-specific effect on the cell.

• Klíčová slova
• Affymetrix GeneChip™ miRNA 3.0 Array, Hep G2 cells, ZEB2, polyphenols, primary cultures of human hepatocytes,
• MeSH
• apoptóza účinky léků   MeSH
• buňky Hep G2 metabolismus   MeSH
• epitelo-mezenchymální tranzice genetika   MeSH
• exprese genu účinky léků   genetika   MeSH
• hepatocyty účinky léků   metabolismus   MeSH
• lidé MeSH
• mikro RNA účinky léků   genetika   MeSH
• pohyb buněk účinky léků   MeSH
• polyfenoly farmakologie   MeSH
• primární buněčná kultura MeSH
• proliferace buněk účinky léků   MeSH
• quercetin analogy a deriváty   metabolismus   farmakologie   MeSH
• regulace genové exprese u nádorů účinky léků   MeSH
• signální transdukce genetika   MeSH
• transkripční faktor Zeb2 účinky léků   metabolismus   MeSH
• transkriptom účinky léků   genetika   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• mikro RNA MeSH
• MIRN153 microRNA, human MeSH Prohlížeč
• MIRN204 microRNA, human MeSH Prohlížeč
• MIRN211 microRNA, human MeSH Prohlížeč
• MIRN377 microRNA, human MeSH Prohlížeč
• polyfenoly MeSH
• quercetin MeSH
• taxifolin MeSH Prohlížeč
• transkripční faktor Zeb2 MeSH
• ZEB2 protein, human MeSH Prohlížeč