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  • Title: 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.
    Author: 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.
    Journal: Leuk Res; 2009 Mar; 33(3):465-73. PubMed ID: 18835037.
    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.
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