PMID- 25941588 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20210218 LR - 20210218 IS - 2162-4011 (Print) IS - 2162-402X (Electronic) IS - 2162-4011 (Linking) VI - 3 IP - 11 DP - 2014 Nov TI - HER-3 peptide vaccines/mimics: Combined therapy with IGF-1R, HER-2, and HER-1 peptides induces synergistic antitumor effects against breast and pancreatic cancer cells. PG - e956012 LID - e956012 AB - The human epidermal growth factor receptor 3 (HER-3/ErbB3) is a unique member of the human epidermal growth factor family of receptors, because it lacks intrinsic kinase activity and ability to heterodimerize with other members. HER-3 is frequently upregulated in cancers with epidermal growth factor receptor (EGFR/HER-1/ErbB1) or human epidermal growth factor receptor 2 (HER-2/ErBB2) overexpression, and targeting HER-3 may provide a route for overcoming resistance to agents that target EGFR or HER-2. We have previously developed vaccines and peptide mimics for HER-1, HER-2 and vascular endothelial growth factor (VEGF). In this study, we extend our studies by identifying and evaluating novel HER-3 peptide epitopes encompassing residues 99-122, 140-162, 237-269 and 461-479 of the HER-3 extracellular domain as putative B-cell epitopes for active immunotherapy against HER-3 positive cancers. We show that the HER-3 vaccine antibodies and HER-3 peptide mimics induced antitumor responses: inhibition of cancer cell proliferation, inhibition of receptor phosphorylation, induction of apoptosis and antibody dependent cellular cytotoxicity (ADCC). Two of the HER-3 epitopes 237-269 (domain II) and 461-479 (domain III) significantly inhibited growth of xenografts originating from both pancreatic (BxPC3) and breast (JIMT-1) cancers. Combined therapy of HER-3 (461-471) epitope with HER-2 (266-296), HER-2 (597-626), HER-1 (418-435) and insulin-like growth factor receptor type I (IGF-1R) (56-81) vaccine antibodies and peptide mimics show enhanced antitumor effects in breast and pancreatic cancer cells. This study establishes the hypothesis that combination immunotherapy targeting different signal transduction pathways can provide effective antitumor immunity and long-term control of HER-1 and HER-2 overexpressing cancers. FAU - Miller, Megan Jo AU - Miller MJ AD - Department of Microbiology; The Ohio State University , Columbus, OH USA. FAU - Foy, Kevin C AU - Foy KC AD - Department of Obstetrics and Gynecology; The Ohio State University Wexner Medical Center ; Columbus, OH USA. FAU - Overholser, Jay P AU - Overholser JP AD - Department of Obstetrics and Gynecology; The Ohio State University Wexner Medical Center ; Columbus, OH USA. FAU - Nahta, Rita AU - Nahta R AD - Department of Pharmacology; Emory University , Atlanta, GA USA. FAU - Kaumaya, Pravin Tp AU - Kaumaya PT AD - Department of Microbiology; The Ohio State University , Columbus, OH USA ; Department of Obstetrics and Gynecology; The Ohio State University Wexner Medical Center ; Columbus, OH USA ; The James Cancer Hospital and Solove Research Institute; and the Comprehensive Cancer Center; The Ohio State University , Columbus, OH USA. LA - eng GR - R01 CA157754/CA/NCI NIH HHS/United States GR - R01 CA084356/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20141221 PL - United States TA - Oncoimmunology JT - Oncoimmunology JID - 101570526 PMC - PMC4368151 OTO - NOTNLM OT - ADCC, antibody dependent, cellular cytotoxicity OT - Antibodies OT - ECD, extracellular domain OT - ELISA, enzyme-linked immunosorbent assay OT - FDA, Federal Drug Administration OT - HER-1 OT - HER-1 (EGFR or ErbB1), human epidermal growth factor receptor OT - HER-2 OT - HER-2 (ErbB2), human epidermal growth factor receptor 2 OT - HER-3 (ErbB3), human epidermal growth factor receptor 3 OT - HER-3 (erbb3) OT - HER-4 (ErbB4), human epidermal growth factor receptor 4 OT - HPLC, high-pressure liquid chromatography OT - IGF-1R OT - Immunotherapy OT - MALDI, matrix-assisted laser desorption/ionization OT - MVF, Measles virus fusion protein OT - RTK, receptor tyrosine kinase OT - TKIs, Tyrosine kinase inhibitors. OT - immunogenicity OT - mAb, monocolonal antibody OT - peptide vaccines OT - peptidomimetics OT - receptor tyrosine kinases EDAT- 2015/05/06 06:00 MHDA- 2015/05/06 06:01 PMCR- 2015/12/17 CRDT- 2015/05/06 06:00 PHST- 2014/07/08 00:00 [received] PHST- 2014/08/14 00:00 [accepted] PHST- 2015/05/06 06:00 [entrez] PHST- 2015/05/06 06:00 [pubmed] PHST- 2015/05/06 06:01 [medline] PHST- 2015/12/17 00:00 [pmc-release] AID - 956012 [pii] AID - 10.4161/21624011.2014.956012 [doi] PST - epublish SO - Oncoimmunology. 2014 Dec 21;3(11):e956012. doi: 10.4161/21624011.2014.956012. eCollection 2014 Nov.