PMID- 24092811 OWN - NLM STAT- MEDLINE DCOM- 20140929 LR - 20201226 IS - 1538-8514 (Electronic) IS - 1535-7163 (Linking) VI - 13 IP - 1 DP - 2014 Jan TI - Tetravalent antibody-scTRAIL fusion proteins with improved properties. PG - 101-11 LID - 10.1158/1535-7163.MCT-13-0396 [doi] AB - We applied the immunoglobulin E (IgE) heavy-chain domain 2 (EHD2) as the covalently linked homodimerization module to generate antibody-scTRAIL fusion proteins. By fusing a humanized single-chain fragment variable (scFv) directed against EGFR to the N-terminus of the EHD2 and a single-chain derivative of TRAIL (scTRAIL) to the C-terminus of the EHD2, we produced a dimeric, tetravalent fusion protein. The fusion protein retained its binding activity for EGFR and TRAIL receptors. In vitro, the targeted antibody-scTRAIL fusion protein exhibited an approximately 8- to 18-fold increased cytotoxic activity compared with the untargeted EHD2-scTRAIL fusion protein. This resulted in increased antitumor activity in a subcutaneous Colo205 xenograft tumor murine model. In summary, the scFv-EHD2-scTRAIL fusion protein combines target cell selectivity with an increased TRAIL activity leading to improved antitumor activities. FAU - Seifert, Oliver AU - Seifert O AD - Corresponding Author: Roland E. Kontermann, Institut fur Zellbiologie und Immunologie, Universitat Stuttgart, Allmandring 31, 70569 Stuttgart, Germany. roland.kontermann@izi.uni-stuttgart.de. FAU - Plappert, Aline AU - Plappert A FAU - Fellermeier, Sina AU - Fellermeier S FAU - Siegemund, Martin AU - Siegemund M FAU - Pfizenmaier, Klaus AU - Pfizenmaier K FAU - Kontermann, Roland E AU - Kontermann RE LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131003 PL - United States TA - Mol Cancer Ther JT - Molecular cancer therapeutics JID - 101132535 RN - 0 (Antibodies, Monoclonal, Humanized) RN - 0 (Receptors, TNF-Related Apoptosis-Inducing Ligand) RN - 0 (Recombinant Fusion Proteins) RN - 0 (Single-Chain Antibodies) RN - 0 (TNF-Related Apoptosis-Inducing Ligand) RN - 37341-29-0 (Immunoglobulin E) RN - EC 2.7.10.1 (EGFR protein, human) RN - EC 2.7.10.1 (ErbB Receptors) SB - IM MH - Animals MH - Antibodies, Monoclonal, Humanized/*pharmacology MH - Apoptosis/genetics/immunology MH - Cell Line, Tumor MH - ErbB Receptors/genetics/immunology MH - Humans MH - Immunoglobulin E/genetics/immunology/*pharmacology MH - Mice MH - Neoplasms/genetics/*immunology/therapy MH - Receptors, TNF-Related Apoptosis-Inducing Ligand/genetics/immunology MH - Recombinant Fusion Proteins/immunology/pharmacology MH - Single-Chain Antibodies/genetics/immunology/*pharmacology MH - TNF-Related Apoptosis-Inducing Ligand/*genetics/immunology MH - Xenograft Model Antitumor Assays EDAT- 2013/10/05 06:00 MHDA- 2014/09/30 06:00 CRDT- 2013/10/05 06:00 PHST- 2013/10/05 06:00 [entrez] PHST- 2013/10/05 06:00 [pubmed] PHST- 2014/09/30 06:00 [medline] AID - 1535-7163.MCT-13-0396 [pii] AID - 10.1158/1535-7163.MCT-13-0396 [doi] PST - ppublish SO - Mol Cancer Ther. 2014 Jan;13(1):101-11. doi: 10.1158/1535-7163.MCT-13-0396. Epub 2013 Oct 3.