PMID- 23918228 OWN - NLM STAT- MEDLINE DCOM- 20131223 LR - 20220129 IS - 1757-4684 (Electronic) IS - 1757-4676 (Print) IS - 1757-4676 (Linking) VI - 5 IP - 8 DP - 2013 Aug TI - IgA EGFR antibodies mediate tumour killing in vivo. PG - 1213-26 LID - 10.1002/emmm.201201929 [doi] AB - Currently all approved anti-cancer therapeutic monoclonal antibodies (mAbs) are of the IgG isotype, which rely on Fcgamma receptors (FcgammaRs) to recruit cellular effector functions. In vitro studies showed that targeting of FcalphaRI (CD89) by bispecific antibodies (bsAbs) or recombinant IgA resulted in more effective elimination of tumour cells by myeloid effector cells than targeting of FcgammaR. Here we studied the in vivo anti-tumour activity of IgA EGFR antibodies generated using the variable sequences of the chimeric EGFR antibody cetuximab. Using FcalphaRI transgenic mice, we demonstrated significant in vivo anti-tumour activity of IgA2 EGFR against A431 cells in peritoneal and lung xenograft models, as well as against B16F10-EGFR cells in a lung metastasis model in immunocompetent mice. IgA2 EGFR was more effective than cetuximab in a short-term syngeneic peritoneal model using EGFR-transfected Ba/F3 target cells. The in vivo cytotoxic activity of IgA2 EGFR was mediated by macrophages and was significantly decreased in the absence of FcalphaRI. These results support the potential of targeting FcalphaRI for effective antibody therapy of cancer. CI - (c) 2013 The Authors. Published by John Wiley and Sons, Ltd on behalf of EMBO. FAU - Boross, Peter AU - Boross P AD - Immunotherapy Laboratory, Laboratory for Translational Immunology, UMC Utrecht, Utrecht, The Netherlands. FAU - Lohse, Stefan AU - Lohse S FAU - Nederend, Maaike AU - Nederend M FAU - Jansen, Johannes Hendrik Marco AU - Jansen JH FAU - van Tetering, Geert AU - van Tetering G FAU - Dechant, Michael AU - Dechant M FAU - Peipp, Matthias AU - Peipp M FAU - Royle, Louise AU - Royle L FAU - Liew, Li Phing AU - Liew LP FAU - Boon, Louis AU - Boon L FAU - van Rooijen, Nico AU - van Rooijen N FAU - Bleeker, Wim K AU - Bleeker WK FAU - Parren, Paul W H I AU - Parren PW FAU - van de Winkel, Jan G J AU - van de Winkel JG FAU - Valerius, Thomas AU - Valerius T FAU - Leusen, Jeanette H W AU - Leusen JH LA - eng GR - 11-0120/AICR_/Worldwide Cancer Research/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - EMBO Mol Med JT - EMBO molecular medicine JID - 101487380 RN - 0 (Antibodies, Monoclonal, Humanized) RN - 0 (Antigens, CD) RN - 0 (Fc(alpha) receptor) RN - 0 (Immunoglobulin A) RN - 0 (Receptors, Fc) RN - 0 (Recombinant Proteins) RN - EC 2.7.10.1 (ErbB Receptors) RN - PQX0D8J21J (Cetuximab) SB - IM MH - Animals MH - Antibodies, Monoclonal, Humanized/*pharmacology MH - Antibody-Dependent Cell Cytotoxicity/immunology MH - Antigens, CD/immunology MH - Cell Line, Tumor MH - Cetuximab MH - ErbB Receptors/*antagonists & inhibitors/immunology MH - Flow Cytometry MH - Humans MH - Immunoglobulin A/*pharmacology MH - Immunotherapy/methods MH - Macrophages/metabolism MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Mice, SCID MH - Mice, Transgenic MH - Neoplasm Metastasis MH - Neoplasm Transplantation MH - Neoplasms/*drug therapy/immunology MH - Receptors, Fc/immunology MH - Recombinant Proteins/pharmacology PMC - PMC3944462 OTO - NOTNLM OT - EGFR OT - Fcalpha receptor I OT - IgA OT - antibody therapy OT - tumour immunology EDAT- 2013/08/07 06:00 MHDA- 2013/12/24 06:00 PMCR- 2013/08/01 CRDT- 2013/08/07 06:00 PHST- 2012/08/23 00:00 [received] PHST- 2013/06/06 00:00 [revised] PHST- 2013/06/08 00:00 [accepted] PHST- 2013/08/07 06:00 [entrez] PHST- 2013/08/07 06:00 [pubmed] PHST- 2013/12/24 06:00 [medline] PHST- 2013/08/01 00:00 [pmc-release] AID - 10.1002/emmm.201201929 [doi] PST - ppublish SO - EMBO Mol Med. 2013 Aug;5(8):1213-26. doi: 10.1002/emmm.201201929.