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  • Title: Discovery of dihydroisoquinolinone derivatives as novel inhibitors of the p53-MDM2 interaction with a distinct binding mode.
    Author: Gessier F, Kallen J, Jacoby E, Chène P, Stachyra-Valat T, Ruetz S, Jeay S, Holzer P, Masuya K, Furet P.
    Journal: Bioorg Med Chem Lett; 2015 Sep 01; 25(17):3621-5. PubMed ID: 26141769.
    Abstract:
    Blocking the interaction between the p53 tumor suppressor and its regulatory protein MDM2 is a promising therapeutic concept under current investigation in oncology drug research. We report here the discovery of the first representatives of a new class of small molecule inhibitors of this protein-protein interaction: the dihydroisoquinolinones. Starting from an initial hit identified by virtual screening, a derivatization program has resulted in compound 11, a low nanomolar inhibitor of the p53-MDM2 interaction showing significant cellular activity. Initially based on a binding mode hypothesis, this effort was then guided by a X-ray co-crystal structure of MDM2 in complex with one of the synthesized analogs. The X-ray structure revealed an unprecedented binding mode for p53-MDM2 inhibitors.
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