A novel penicillin derivative induces antitumor effect in melanoma cells

Anti-cancer Drugs
Viviana C BlankLeonor P Roguin

Abstract

In this study, we explored the in-vitro and in-vivo mechanism of antitumor action of a novel synthetic nonantibiotic triazolylpeptidyl penicillin derivative, named TAP7f, on B16-F0 murine melanoma cells. In-vitro assays showed that TAP7f caused an inhibition of S phase progression and a concomitant decrease of the percentage of cells in G0/G1 phase. We also found that TAP7f treatment induced an apoptotic response characterized by an increase of the sub-G1 fraction of B16-F0 hypodiploid cells, the occurrence of cells with picnotic nuclei, and the detection of phosphatidylserine exposure on the outer side of the plasma membrane. Apoptotic cell death was further characterized by the activation of caspase-8, caspase-9, and caspase-3; the increase in the proapoptotic/antiapoptotic ratio of Bcl-2 family proteins; the higher expression levels of Fas receptor and TRAIL ligand; and the cleavage of poly(ADP-ribose) polymerase, a caspase-3 substrate. The in-vivo effect of TAP7f was studied in a syngeneic C57BL/6J mouse melanoma model. Results showed that TAP7f inhibited melanoma cell proliferation in vivo, as determined by a decreased expression of proliferating cell nuclear antigen, inducing a significant reduction of tumor growth. Apopt...Continue Reading

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Citations

Nov 14, 2021·Apoptosis : an International Journal on Programmed Cell Death·Yanina BellizziLeonor P Roguin

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