Abstract
Background: Cytokine-Induced Killer (CIK) cells are a heterogeneous population of ex vivo expanded lymphocytes which exhibit an MHC-unrestricted cytotoxicity against a wide range of tumor histotypes. Moreover, recent reports have also proven that CIK cells express CD16 in a donor-dependent manner, which makes them able to exert Antibody Dependent Cell-Mediated Cytotoxicity (ADCC)[1]. In this study, we aimed at increasing CIK cell antitumor activity using Fc-engineered trastuzumab, bispecific antibodies or recombinant immunoligands, which are able to target both a tumor-associated antigen (Her2) and activating receptors expressed by CIK cells (CD3, NKG2D and NKp30).
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