Journal of Medicinal Chemistry p. 4250 - 4265 (2015)
Update date:2022-08-17
Topics:
Martins, Inês L.
Charneira, Catarina
Gandin, Valentina
Ferreira Da Silva, Jo?o L.
Justino, Gon?alo C.
Telo, Jo?o P.
Vieira, Abel J. S. C.
Marzano, Cristina
Antunes, Alexandra M. M.
Selenium-containing chrysin (SeChry) and 3,7,3′,4′-tetramethylquercetin (SePQue) derivatives were synthesized by a microwave-based methodology. In addition to their improvement in terms of DPPH scavenging and potential GPx-like activities, when tested in a panel of cancer cell lines both selenium-derivatives revealed consistently to be more cytotoxic when compared with their oxo and thio-analogues, evidencing the key role of selenocabonyl moiety for these activities. In particular, SeChry elicited a noteworthy cytotoxic activity with mean IC50 values 18- and 3-fold lower than those observed for chrysin and cisplatin, respectively. Additionally, these seleno-derivatives evidenced an ability to overcome cisplatin and multidrug resistance. Notably, a differential behavior toward malignant and nonmalignant cells was observed for SeChry and SePQue, exhibiting higher selectivity indexes when compared with the chalcogen-derivatives and cisplatin. Our preliminary investigation on the mechanism of cytotoxicity of SeChry and SePQue in MCF-7 human mammary cancer cells demonstrated their capacity to efficiently suppress the clonal expansion along with their ability to hamper TrxR activity leading to apoptotic cell death.
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