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Nanoencapsulation of the flavonoid dihydromyricetin protects against the genotoxicity and cytotoxicity induced by cationic nanocapsules.

We evaluated the influence of nanoencapsulation of the flavonoid Dihydromyricetin (DMY) in reducing the genotoxicity and cytotoxicity induced by cationic nanocapsules. Assays were conducted in order to evaluate the potential of protein corona formation, cytotoxicity, genotoxicity and the antioxidant capacity. Nanocapsules containing DMY (NC-DMY) and free DMY (DMY-F) did not demonstrate cytotoxicity and genotoxicity. However, Eudragit RS100® nanocapsules (NC-E) increased cytotoxicity and DNA damage formation. NC-DMY and NC-E presented high interaction with the DNA in vitro, suggesting DNA sequestration. These results indicate that nanoencapsulated DMY does not induce cytotoxicity or genotoxicity, and demonstrates high antioxidant capacity. This antioxidant capacity is probably associated with DMY, and occurs due to its ability to avoid the formation of free radicals, thus preventing the toxicity caused by the nanostructure with the cationic polymer Eudragit RS100® . Therefore, NC-DMY can be considered an important formulation with significant antioxidant potential to be exploited by nanomedicine.

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