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  • Title: Combined treatment of CpG-oligodeoxynucleotide with Nutlin-3 induces strong immune stimulation coupled to cytotoxicity in B-chronic lymphocytic leukemic (B-CLL) cells.
    Author: Secchiero P, Melloni E, Tiribelli M, Gonelli A, Zauli G.
    Journal: J Leukoc Biol; 2008 Feb; 83(2):434-7. PubMed ID: 17998303.
    Abstract:
    We have investigated the effect of combined treatment with CpG-oligodeoxynucleotide (CpG-ODN) plus Nutlin-3, a small molecule inhibitor of the murine double minute 2/p53 interaction, on the immune activation, cell cycle progression, and apoptosis of peripheral blood B chronic lymphocytic leukemia (B-CLL) cells. CpG-ODN induced a robust up-regulation of immune activation markers (CD54, CD69, CD80, CD86, MHC-II) in Zap70high and Zap70low B-CLL samples. Although cotreatment of B-CLL cells with CpG-ODN + Nutlin-3 did not interfere with such immune activation, CpG-ODN potentiated the Nutlin-3-mediated induction of the death receptors CD95 and TRAIL receptor 2. Importantly, treatment with CpG-ODN did not interfere with the ability of Nutlin-3 to inhibit cell cycle progression and to induce apoptosis. Thus, a therapeutic regimen including CpG-ODN plus Nutlin-3 might have the advantage to preserve the immune activation of B-CLL cells while restraining the prosurvival/proliferative potential of CpG-ODN treatment.
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