Anti-CD3 x EGFR bispecific antibody redirects cytokine-induced killer cells to glioblastoma in vitro and in vivo

Oncology Reports
Pan MaBin Gao

Abstract

The epidermal growth factor receptor (EGFR) is an attractive target for the immunotherapy of EGFR+ tumors. Adjuvant immunotherapy with cytokine-induced killer (CIK) cells may improve progression-free survival rates in patients suffering from cancer. In the present study, we examined the bispecific antibody anti-CD3 x anti-EGFR (EGFRBi-Ab) for its ability to redirect CIK cells to target EGFR-positive glioblastoma. The specific cytolytic activity of CIK cells armed with EGFRBi-Ab against U87MG-luc cells was evaluated by bioluminescent signal generated using luciferase reporter assay which did not alter the surface molecule expression or proliferation ability of U87MG cells. In contrast to unarmed CIK cells, increased cytotoxic activity of EGFRBi-armed CIK cells against the U87MG-luc target was observed at effector/target (E/T) ratios of 5:1, 10:1, and 20:1. Moreover, EGFRBi-armed CIK cells secreted significantly higher levels of IFN-γ, TNF-α, and IL-2 than their unarmed CIK counterpart cells. Furthermore, in glioblastoma xenograft mice, infusion of the EGFRBi-armed CIK cells successfully inhibited the growth of glioblastoma tumors. The in vitro and in vivo antitumor effects of EGFRBi-armed CIK cells support their clinical use for...Continue Reading

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Citations

Dec 18, 2018·Journal of Cellular Biochemistry·Solmaz ShirjangMehdi Yousefi
May 6, 2017·Targeted Oncology·Juan J Mata-MolanesAntonio Brugarolas Masllorens
Sep 22, 2017·Journal of Hematology & Oncology·Shengnan YuKongming Wu
Jul 22, 2017·Frontiers in Immunology·Xingchun GaoWeilin Jin

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