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    Leuk Res. 2009 Mar;33(3):465-73. Epub 2008 Oct 2.

    Combination of rituximab with blinatumomab (MT103/MEDI-538), a T cell-engaging CD19-/CD3-bispecific antibody, for highly efficient lysis of human B lymphoma cells.

    d'Argouges S, Wissing S, Brandl C, Prang N, Lutterbuese R, Kozhich A, Suzich J, Locher M, Kiener P, Kufer P, Hofmeister R, Baeuerle PA, Bargou RC.

    Source

    Micromet AG, Staffelseestr. 2, 81477 Munich, Germany.

    Abstract

    We have compared the cytotoxic activity of rituximab with that of blinatumomab (MT103/MEDI-538), a single-chain CD19-/CD3-bispecific antibody engaging human T cells. Blinatumomab consistently led to a higher degree of lysis of human lymphoma lines than rituximab, and was active at much lower concentration. The cytotoxicity mediated by blinatumomab and rituximab both caused a potent activation of pro-caspases 3 and 7 in target cells, a key event in induction of granzyme-mediated apoptotic cell death. Combination of rituximab with blinatumomab was found to greatly enhance the activity of rituximab, in particular at low effector-to-target cell ratios and at low antibody concentration.

    PMID:
    18835037
    [PubMed - indexed for MEDLINE]

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