1
|
Klingler F, Schlossbauer P, Naumann L, Handrick R, Hesse F, Neusüß C, Otte K. Developing microRNAs as engineering tools to modulate monoclonal antibody galactosylation. Biotechnol Bioeng 2024; 121:1355-1365. [PMID: 38079069 DOI: 10.1002/bit.28616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 11/24/2023] [Accepted: 11/25/2023] [Indexed: 04/01/2024]
Abstract
N-linked glycosylation is one of the most important post-translational modifications of monoclonal antibodies (mAbs) and is considered to be a critical quality attribute (CQA), as the glycan composition often has immunomodulatory effects. Since terminal galactose residues of mAbs can affect antibody-dependent cellular cytotoxicity (ADCC), complement-dependent cytolysis (CDC) activation, serum half-life, and antiviral activity it has to be monitored, controlled and modulated to ensure therapeutic effects. The ability of small noncoding microRNAs (miRNAs) to modulate glycosylation in Chinese hamster ovary (CHO) production cells was recently reported establishing miRNAs as engineering tools for modulation of protein glycosylation. In this study, we report the characterization and validation of miRNAs as engineering tools for increased (mmu-miR-452-5p, mmu-miR-193b-3p) or decreased (mmu-miR-7646-5p, mmu-miR-7243-3p, mmu-miR-1668, mmu-let-7c-1-3p, mmu-miR-7665-3p, mmu-miR-6403) degree of galactosylation. Furthermore, the biological mode of action regulating gene expression of the galactosylation pathway was characterized as well as their influence on bioprocess-related parameters. Most important, stable plasmid-based overexpression of these miRNAs represents a versatile tool for engineering N-linked galactosylation to achieve favorable phenotypes in cell lines for biopharmaceutical production.
Collapse
Affiliation(s)
- Florian Klingler
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Biberach, Germany
| | - Patrick Schlossbauer
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Biberach, Germany
| | - Lukas Naumann
- Department of Chemistry, Aalen University, Aalen, Germany
| | - René Handrick
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Biberach, Germany
| | - Friedemann Hesse
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Biberach, Germany
| | | | - Kerstin Otte
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Biberach, Germany
| |
Collapse
|
2
|
Klingler F, Naumann L, Schlossbauer P, Dreyer L, Burkhart M, Handrick R, Junker HD, Hesse F, Neusüß C, Otte K. A novel system for glycosylation engineering by natural and artificial miRNAs. Metab Eng 2023; 77:53-63. [PMID: 36906118 DOI: 10.1016/j.ymben.2023.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 12/19/2022] [Accepted: 03/05/2023] [Indexed: 03/13/2023]
Abstract
N-linked glycosylation is a crucial post-translational modification of many biopharmaceuticals, including monoclonal antibodies (mAbs), capable of modifying their biological effect in patients and thus considered as a critical quality attribute (CQA). However, expression of desired and consistent glycosylation patterns remains a constant challenge for the biopharmaceutical industry and constitutes the need for tools to engineer glycosylation. Small non-coding microRNAs (miRNAs) are known regulators of entire gene networks and have therefore the potential of being used as tools for modulation of glycosylation pathways and for glycoengineering. Here, we demonstrate that novel identified natural miRNAs are capable of altering N-linked glycosylation patterns on mAbs expressed in Chinese hamster ovary (CHO) cells. We established a workflow for a functional high-throughput screening of a complete miRNA mimic library and identified 82 miRNA sequences affecting various moieties including galactosylation, sialylation, and α-1,6 linked core-fucosylation, an important glycan feature influencing antibody-dependent cytotoxicity (ADCC). Subsequent validation shed light on the intra-cellular mode of action and the impact on the cellular fucosylation pathway of miRNAs reducing core-fucosylation. While multiplex approaches increased phenotypic effects on the glycan structure, a synthetic biology approach utilizing rational design of artificial miRNAs further enhanced the potential of miRNAs as novel, versatile and tune-able tools for engineering of N-linked glycosylation pathways and expressed glycosylation patterns towards favourable phenotypes.
Collapse
Affiliation(s)
- Florian Klingler
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Hubertus-Liebrecht-Str. 35, 88400, Biberach, Germany.
| | - Lukas Naumann
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Patrick Schlossbauer
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Hubertus-Liebrecht-Str. 35, 88400, Biberach, Germany
| | - Leonard Dreyer
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Madina Burkhart
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Hubertus-Liebrecht-Str. 35, 88400, Biberach, Germany
| | - René Handrick
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Hubertus-Liebrecht-Str. 35, 88400, Biberach, Germany
| | - Hans-Dieter Junker
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Friedemann Hesse
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Hubertus-Liebrecht-Str. 35, 88400, Biberach, Germany
| | - Christian Neusüß
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430, Aalen, Germany
| | - Kerstin Otte
- Institute for Applied Biotechnology, University of Applied Sciences Biberach, Hubertus-Liebrecht-Str. 35, 88400, Biberach, Germany
| |
Collapse
|
3
|
Baumann N, Rösner T, Jansen JHM, Chan C, Marie Eichholz K, Klausz K, Winterberg D, Müller K, Humpe A, Burger R, Peipp M, Schewe DM, Kellner C, Leusen JHW, Valerius T. Enhancement of epidermal growth factor receptor antibody tumor immunotherapy by glutaminyl cyclase inhibition to interfere with CD47/signal regulatory protein alpha interactions. Cancer Sci 2021; 112:3029-3040. [PMID: 34058788 PMCID: PMC8353920 DOI: 10.1111/cas.14999] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/17/2021] [Accepted: 05/23/2021] [Indexed: 12/21/2022] Open
Abstract
Integrin associated protein (CD47) is an important target in immunotherapy, as it is expressed as a "don't eat me" signal on many tumor cells. Interference with its counter molecule signal regulatory protein alpha (SIRPα), expressed on myeloid cells, can be achieved with blocking Abs, but also by inhibiting the enzyme glutaminyl cyclase (QC) with small molecules. Glutaminyl cyclase inhibition reduces N-terminal pyro-glutamate formation of CD47 at the SIRPα binding site. Here, we investigated the impact of QC inhibition on myeloid effector cell-mediated tumor cell killing by epidermal growth factor receptor (EGFR) Abs and the influence of Ab isotypes. SEN177 is a QC inhibitor and did not interfere with EGFR Ab-mediated direct growth inhibition, complement-dependent cytotoxicity, or Ab-dependent cell-mediated cytotoxicity (ADCC) by mononuclear cells. However, binding of a human soluble SIRPα-Fc fusion protein to SEN177 treated cancer cells was significantly reduced in a dose-dependent manner, suggesting that pyro-glutamate formation of CD47 was affected. Glutaminyl cyclase inhibition in tumor cells translated into enhanced Ab-dependent cellular phagocytosis by macrophages and enhanced ADCC by polymorphonuclear neutrophilic granulocytes. Polymorphonuclear neutrophilic granulocyte-mediated ADCC was significantly more effective with EGFR Abs of human IgG2 or IgA2 isotypes than with IgG1 Abs, proposing that the selection of Ab isotypes could critically affect the efficacy of Ab therapy in the presence of QC inhibition. Importantly, QC inhibition also enhanced the therapeutic efficacy of EGFR Abs in vivo. Together, these results suggest a novel approach to specifically enhance myeloid effector cell-mediated efficacy of EGFR Abs by orally applicable small molecule QC inhibitors.
Collapse
Affiliation(s)
- Niklas Baumann
- Section for Stem Cell Transplantation and ImmunotherapyDepartment of Medicine IIChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Thies Rösner
- Section for Stem Cell Transplantation and ImmunotherapyDepartment of Medicine IIChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - J. H. Marco Jansen
- Immunotherapy LaboratoryCenter for Translational ImmunologyUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Chilam Chan
- Immunotherapy LaboratoryCenter for Translational ImmunologyUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Klara Marie Eichholz
- Section for Stem Cell Transplantation and ImmunotherapyDepartment of Medicine IIChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Katja Klausz
- Section for Stem Cell Transplantation and ImmunotherapyDepartment of Medicine IIChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Dorothee Winterberg
- Pediatric Hematology/OncologyALL‐BFM Study GroupChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Kristina Müller
- Pediatric Hematology/OncologyALL‐BFM Study GroupChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Andreas Humpe
- Department of Transfusion Medicine, Cell Therapeutics and HemostaseologyUniversity HospitalLMU MunichMunichGermany
| | - Renate Burger
- Section for Stem Cell Transplantation and ImmunotherapyDepartment of Medicine IIChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Matthias Peipp
- Section for Stem Cell Transplantation and ImmunotherapyDepartment of Medicine IIChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Denis M. Schewe
- Pediatric Hematology/OncologyALL‐BFM Study GroupChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| | - Christian Kellner
- Department of Transfusion Medicine, Cell Therapeutics and HemostaseologyUniversity HospitalLMU MunichMunichGermany
| | - Jeanette H. W. Leusen
- Immunotherapy LaboratoryCenter for Translational ImmunologyUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Thomas Valerius
- Section for Stem Cell Transplantation and ImmunotherapyDepartment of Medicine IIChristian‐Albrechts‐University Kiel and University Medical Center Schleswig‐Holstein, Campus KielKielGermany
| |
Collapse
|
4
|
Donini R, Haslam SM, Kontoravdi C. Glycoengineering Chinese hamster ovary cells: a short history. Biochem Soc Trans 2021; 49:915-931. [PMID: 33704400 PMCID: PMC8106501 DOI: 10.1042/bst20200840] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/26/2021] [Accepted: 02/08/2021] [Indexed: 12/25/2022]
Abstract
Biotherapeutic glycoproteins have revolutionised the field of pharmaceuticals, with new discoveries and continuous improvements underpinning the rapid growth of this industry. N-glycosylation is a critical quality attribute of biotherapeutic glycoproteins that influences the efficacy, half-life and immunogenicity of these drugs. This review will focus on the advances and future directions of remodelling N-glycosylation in Chinese hamster ovary (CHO) cells, which are the workhorse of recombinant biotherapeutic production, with particular emphasis on antibody products, using strategies such as cell line and protein backbone engineering.
Collapse
Affiliation(s)
- Roberto Donini
- Department of Life Sciences, Imperial College London, London SW7 2AZ, U.K
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Stuart M. Haslam
- Department of Life Sciences, Imperial College London, London SW7 2AZ, U.K
| | - Cleo Kontoravdi
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
| |
Collapse
|
5
|
Doyle HA, Koski RA, Bonafé N, Bruck RA, Tagliatela SM, Gee RJ, Mamula MJ. Epidermal growth factor receptor peptide vaccination induces cross-reactive immunity to human EGFR, HER2, and HER3. Cancer Immunol Immunother 2018; 67:1559-1569. [PMID: 30056598 DOI: 10.1007/s00262-018-2218-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 07/24/2018] [Indexed: 12/13/2022]
Abstract
Current treatments for tumors expressing epidermal growth factor receptor (EGFR) include anti-EGFR monoclonal antibodies, often used in conjunction with the standard chemotherapy, radiation therapy, or other EGFR inhibitors. While monoclonal antibody treatment is efficacious in many patients, drawbacks include its high cost of treatment and side effects associated with multiple drug infusions. As an alternative to monoclonal antibody treatments, we have focused on peptide-based vaccination to trigger natural anti-tumor antibodies. Here, we demonstrate that peptides based on a region of the EGFR extracellular domain IV break immune tolerance to EGFR and elicit anti-tumor immunity. Mice immunized with isoforms of EGFR peptide p580-598 generated anti-EGFR antibody and T-cell responses. Iso-aspartyl (iso-Asp)-modified EGFR p580 immune sera inhibit in vitro growth of EGFR overexpressing human A431 tumor cells, as well as promote antibody-dependent cell-mediated cytotoxicity (ADCC). Antibodies induced by Asp and iso-Asp p580 bound homologous regions of the EGFR family members HER2 and HER3. EGFR p580 immune sera also inhibited the growth of the human tumor cell line MDA-MB-453 that expresses HER2 but not EGFR. Asp and iso-Asp EGFR p580 induced antibodies were also able to inhibit the in vivo growth of EGFR-expressing tumors. These data demonstrate that EGFR peptides from a region of the EGFR extracellular domain IV promote anti-tumor immunity, tumor cell killing, and antibodies that are cross reactive with ErbB family members.
Collapse
Affiliation(s)
- Hester A Doyle
- Section of Rheumatology, Yale University School of Medicine, P.O. Box 208031, New Haven, CT, 06520-8031, USA
| | | | | | - Ross A Bruck
- Section of Rheumatology, Yale University School of Medicine, P.O. Box 208031, New Haven, CT, 06520-8031, USA
| | - Stephanie M Tagliatela
- Section of Rheumatology, Yale University School of Medicine, P.O. Box 208031, New Haven, CT, 06520-8031, USA
| | - Renelle J Gee
- Section of Rheumatology, Yale University School of Medicine, P.O. Box 208031, New Haven, CT, 06520-8031, USA
| | - Mark J Mamula
- Section of Rheumatology, Yale University School of Medicine, P.O. Box 208031, New Haven, CT, 06520-8031, USA.
| |
Collapse
|
6
|
Yang Y, Guo R, Chen Q, Liu Y, Zhang P, Zhang Z, Chen X, Wang T. A novel bispecific antibody fusion protein co-targeting EGFR and CD47 with enhanced therapeutic index. Biotechnol Lett 2018; 40:789-795. [PMID: 29600425 DOI: 10.1007/s10529-018-2535-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 03/01/2018] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To promote targeting specificity of anti-CD47 agents, we have constructed a novel bispecific antibody fusion protein against EGFR and CD47, which may minimize the "off-target" effects caused by CD47 expression on red blood cells. RESULTS The novel bispecific antibody fusion protein, denoted as Bi-SP could simultaneously bind to EGFR and CD47 and exhibited potent phagocytosis-stimulation effects in vitro. Bi-SP treatment with a low dose more effectively inhibited tumor growth than either EGFR-targeting antibody, Pan or the SIRPα variant-Fc (SIRPαV-Fc) in the A431 xenograft tumor model. In addition, the treatment with Bi-SP produced less red blood cell (RBC) losses than the SIRPαV-Fc treatment, suggesting its potential use for minimizing RBC toxicity in therapy. CONCLUSIONS Bi-SP with improved therapeutic index has the potential to treat CD47+ and EGFR+ cancers in clinics.
Collapse
Affiliation(s)
- Yun Yang
- School of Basic Medical Sciences, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453000, Henan, People's Republic of China
| | - Rui Guo
- College of Biomedical Engineering, Xinxiang Medical University, Xinxiang, Henan, People's Republic of China
| | - Qi Chen
- Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Youxun Liu
- School of Basic Medical Sciences, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453000, Henan, People's Republic of China
| | - Pengfei Zhang
- School of Basic Medical Sciences, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453000, Henan, People's Republic of China
| | - Ziheng Zhang
- School of Basic Medical Sciences, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453000, Henan, People's Republic of China
| | - Xi Chen
- Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Tianyun Wang
- School of Basic Medical Sciences, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453000, Henan, People's Republic of China.
| |
Collapse
|
7
|
Wang W, Green M, Rebecca Liu J, Lawrence TS, Zou W. CD8+ T Cells in Immunotherapy, Radiotherapy, and Chemotherapy. Oncoimmunology 2018. [DOI: 10.1007/978-3-319-62431-0_3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
|
8
|
Tammen A, Derer S, Schwanbeck R, Rösner T, Kretschmer A, Beurskens FJ, Schuurman J, Parren PWHI, Valerius T. Monoclonal Antibodies against Epidermal Growth Factor Receptor Acquire an Ability To Kill Tumor Cells through Complement Activation by Mutations That Selectively Facilitate the Hexamerization of IgG on Opsonized Cells. THE JOURNAL OF IMMUNOLOGY 2017; 198:1585-1594. [DOI: 10.4049/jimmunol.1601268] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 12/06/2016] [Indexed: 01/12/2023]
|
9
|
Grugan KD, Dorn K, Jarantow SW, Bushey BS, Pardinas JR, Laquerre S, Moores SL, Chiu ML. Fc-mediated activity of EGFR x c-Met bispecific antibody JNJ-61186372 enhanced killing of lung cancer cells. MAbs 2016; 9:114-126. [PMID: 27786612 PMCID: PMC5240640 DOI: 10.1080/19420862.2016.1249079] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) mutant non-small cell lung cancers acquire resistance to EGFR tyrosine kinase inhibitors through multiple mechanisms including c-Met receptor pathway activation. We generated a bispecific antibody targeting EGFR and c-Met (JNJ-61186372) demonstrating anti-tumor activity in wild-type and mutant EGFR settings with c-Met pathway activation. JNJ-61186372 was engineered with low fucosylation (<10 %), resulting in enhanced antibody-dependent cell-mediated cytotoxicity and FcγRIIIa binding. In vitro and in vivo studies with the single-arm EGFR or c-Met versions of JNJ-61186372 identified that the Fc-activity of JNJ-61186372 is mediated by binding of the anti-EGFR arm and required for inhibition of EGFR-driven tumor cells. In a tumor model driven by both EGFR and c-Met, treatment with Fc-silent JNJ-61186372 or with c-Met single-arm antibody reduced tumor growth inhibition compared to treatment with JNJ-61186372, suggesting that the Fc function of JNJ-61186372 is essential for maximal tumor inhibition. Moreover in this same model, downregulation of both EGFR and c-Met receptors was observed upon treatment with Fc-competent JNJ-61186372, suggesting that the Fc interactions are necessary for down-modulation of the receptors in vivo and for efficacy. These Fc-mediated activities, in combination with inhibition of both the EGFR and c-Met signaling pathways, highlight the multiple mechanisms by which JNJ-61186372 combats therapeutic resistance in EGFR mutant patients.
Collapse
Affiliation(s)
- Katharine D Grugan
- a Biologics Research, Janssen Research and Development, LLC , Spring House , PA , USA
| | - Keri Dorn
- a Biologics Research, Janssen Research and Development, LLC , Spring House , PA , USA
| | - Stephen W Jarantow
- a Biologics Research, Janssen Research and Development, LLC , Spring House , PA , USA
| | - Barbara S Bushey
- b Oncology, Janssen Research and Development, LLC , Spring House , PA , USA
| | - Jose R Pardinas
- a Biologics Research, Janssen Research and Development, LLC , Spring House , PA , USA
| | - Sylvie Laquerre
- b Oncology, Janssen Research and Development, LLC , Spring House , PA , USA
| | - Sheri L Moores
- b Oncology, Janssen Research and Development, LLC , Spring House , PA , USA
| | - Mark L Chiu
- a Biologics Research, Janssen Research and Development, LLC , Spring House , PA , USA
| |
Collapse
|
10
|
Yang Y, Guo Q, Xia M, Li Y, Peng X, Liu T, Tong X, Xu J, Guo H, Qian W, Hou S, Dai J, Wang H, Liu R, Guo Y. Generation and characterization of a target-selectively activated antibody against epidermal growth factor receptor with enhanced anti-tumor potency. MAbs 2015; 7:440-50. [PMID: 25679409 DOI: 10.1080/19420862.2015.1008352] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Panitumumab, as a commercially available antibody, is an effective anticancer therapeutic against epidermal growth factor receptor (EGFR), although it exerts weak antibody-dependent cell-mediated cytotoxicity (ADCC) activity owing to its IgG2 nature. Here, we firstly engineered panitumumab by grafting its variable region into an IgG1 backbone. The engineered panitumumab (denoted as Pan) retained binding activity identical to the parental antibody while exhibiting stronger ADCC activity in vitro and more potent antitumor effect in vivo. To further enhance the target selectivity of Pan, we generated Pan-P by tethering an epitope-blocking peptide to Pan via a tumor-specific protease selective linker. Pan-P showed almost 40-fold weaker affinity compared with Pan, but functional activity was restored to a similar extent as Pan when Pan-P was selectively activated by urokinase-type plasminogen activator (uPA). More importantly, targeted localization of Pan-P was observed in tumor samples from colorectal cancer (CRC) patients and tumor-bearing nude mice, strongly indicating that specific activation also existed ex vivo and in vivo. Furthermore, Pan-P also exhibited effective in vivo antitumor potency similar to Pan. Taken together, our data evidence the enhanced antitumor potency and excellent target selectivity of Pan-P, suggesting its potential use for minimizing on-target toxicity in anti-EGFR therapy.
Collapse
Key Words
- ADCC
- ADCC, antibody-dependent cell-mediated cytotoxicity
- CCK-8, Cell Counting Kit 8Yun
- CI, confidence interval
- CRC, colorectal cancer
- ECD, extracellular domain
- EGFR
- EGFR VIII, EGFR Type III Variant
- EGFR, epidermal growth factor receptor
- ELISA, enzyme-linked immunosorbent assay
- HC, heavy chain
- IgG, Immunoglobulin G
- LC, light chain
- Probody™
- SEC, size exclusion chromatography
- SPR, surface plasmon resonance
- TKI, tyrosine kinase inhibitor
- mAb, monoclonal antibody
- monoclonal antibody
- panitumumab
- target-selective activation
- uPA, urokinase-type plasminogen activator
Collapse
Affiliation(s)
- Yun Yang
- a PLA General Hospital Cancer Center ; PLA School of Medicine ; Beijing , China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Derer S, Cossham M, Rösner T, Kellner C, Beurskens FJ, Schwanbeck R, Lohse S, Sina C, Peipp M, Valerius T. A Complement-Optimized EGFR Antibody Improves Cytotoxic Functions of Polymorphonuclear Cells against Tumor Cells. THE JOURNAL OF IMMUNOLOGY 2015; 195:5077-87. [DOI: 10.4049/jimmunol.1501458] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/20/2015] [Indexed: 11/19/2022]
|
12
|
Liu L. Antibody Glycosylation and Its Impact on the Pharmacokinetics and Pharmacodynamics of Monoclonal Antibodies and Fc-Fusion Proteins. J Pharm Sci 2015; 104:1866-1884. [DOI: 10.1002/jps.24444] [Citation(s) in RCA: 246] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 02/27/2015] [Accepted: 03/17/2015] [Indexed: 12/12/2022]
|
13
|
Abstract
The success of antibody therapy in cancer is consistent with the ability of these molecules to activate immune responses against tumors. Experience in clinical applications, antibody design, and advancement in technology have enabled antibodies to be engineered with enhanced efficacy against cancer cells. This allows re-evaluation of current antibody approaches dominated by antibodies of the IgG class with a new light. Antibodies of the IgE class play a central role in allergic reactions and have many properties that may be advantageous for cancer therapy. IgE-based active and passive immunotherapeutic approaches have been shown to be effective in both in vitro and in vivo models of cancer, suggesting the potential use of these approaches in humans. Further studies on the anticancer efficacy and safety profile of these IgE-based approaches are warranted in preparation for translation toward clinical application.
Collapse
Affiliation(s)
- Lai Sum Leoh
- Division of Surgical Oncology, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Avenue, CHS 54-140, Box 951782, Los Angeles, CA 90095-1782, USA
| | - Tracy R. Daniels-Wells
- Division of Surgical Oncology, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Avenue, CHS 54-140, Box 951782, Los Angeles, CA 90095-1782, USA
| | - Manuel L. Penichet
- Division of Surgical Oncology, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Avenue, CHS 54-140, Box 951782, Los Angeles, CA 90095-1782, USA. Department of Microbiology, Immunology, and Molecular Genetics, University of California, 609 Charles E. Young Dr. East, 1602 Molecular Science Building, Los Angeles, CA 90095, USA. The Jonsson Comprehensive Cancer Center, University of California, 10833 Le Conte Ave, 8-684 Factor Building, Box 951781, Los Angeles, CA 90095, USA. The Molecular Biology Institute, University of California, 611 Charles E. Young Dr., Los Angeles, CA 90095, USA
| |
Collapse
|
14
|
Derer S, Glorius P, Schlaeth M, Lohse S, Klausz K, Muchhal U, Desjarlais JR, Humpe A, Valerius T, Peipp M. Increasing FcγRIIa affinity of an FcγRIII-optimized anti-EGFR antibody restores neutrophil-mediated cytotoxicity. MAbs 2014; 6:409-21. [PMID: 24492248 PMCID: PMC3984330 DOI: 10.4161/mabs.27457] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 12/07/2013] [Accepted: 12/07/2013] [Indexed: 01/27/2023] Open
Abstract
Antibody-dependent cell-mediated cytotoxicity (ADCC) has been suggested as an essential mechanism for the in vivo activity of cetuximab, an epidermal growth factor receptor (EGFR)-targeting therapeutic antibody. Thus, enhancing the affinity of human IgG1 antibodies to natural killer (NK) cell-expressed FcγRIIIa by glyco- or protein-engineering of their Fc portion has been demonstrated to improve NK cell-mediated ADCC and to represent a promising strategy to improve antibody therapy. However, human polymorphonuclear (PMN) effector cells express the highly homologous FcγRIIIb isoform, which is described to be ineffective in triggering ADCC. Here, non-fucosylated or protein-engineered anti-EGFR antibodies with optimized FcγRIIIa affinities demonstrated the expected benefit in NK cell-mediated ADCC, but did not mediate ADCC by PMN, which could be restored by FcγRIIIb blockade. Furthermore, eosinophils and PMN from paroxysmal nocturnal hemoglobinuria patients that expressed no or low levels of FcγRIIIb mediated effective ADCC with FcγRIII-optimized anti-EGFR antibody. Additional experiments with double FcγRIIa/FcγRIII-optimized constructs demonstrated enhanced PMN-mediated ADCC compared with single FcγRIII-optimized antibody. In conclusion, our data demonstrate that FcγRIIIb engagement impairs PMN-mediated ADCC activity of FcγRIII-optimized anti-EGFR antibodies, while further optimization of FcγRIIa binding significantly restores PMN recruitment.
Collapse
MESH Headings
- Antibodies, Monoclonal, Humanized/genetics
- Antibodies, Monoclonal, Humanized/metabolism
- Antibody Affinity/genetics
- Antibody-Dependent Cell Cytotoxicity/genetics
- Cells, Cultured
- Cetuximab
- Cytotoxicity, Immunologic/genetics
- Eosinophils/immunology
- ErbB Receptors/immunology
- Glycosylation
- Hemoglobinuria, Paroxysmal/immunology
- Hemoglobinuria, Paroxysmal/therapy
- Humans
- Immunoglobulin Fc Fragments/genetics
- Immunoglobulin G/genetics
- Immunoglobulin G/metabolism
- Immunotherapy/methods
- Immunotherapy/trends
- Neutrophils/immunology
- Polymorphism, Genetic
- Protein Engineering
- Receptors, IgG/genetics
- Receptors, IgG/immunology
- Receptors, IgG/metabolism
Collapse
Affiliation(s)
- Stefanie Derer
- Division of Stem Cell Transplantation and Immunotherapy; 2nd Department of Medicine; University Hospital Schleswig-Holstein and Christian-Albrechts-University; Kiel, Germany
| | - Pia Glorius
- Division of Stem Cell Transplantation and Immunotherapy; 2nd Department of Medicine; University Hospital Schleswig-Holstein and Christian-Albrechts-University; Kiel, Germany
| | - Martin Schlaeth
- Division of Stem Cell Transplantation and Immunotherapy; 2nd Department of Medicine; University Hospital Schleswig-Holstein and Christian-Albrechts-University; Kiel, Germany
| | - Stefan Lohse
- Division of Stem Cell Transplantation and Immunotherapy; 2nd Department of Medicine; University Hospital Schleswig-Holstein and Christian-Albrechts-University; Kiel, Germany
| | - Katja Klausz
- Division of Stem Cell Transplantation and Immunotherapy; 2nd Department of Medicine; University Hospital Schleswig-Holstein and Christian-Albrechts-University; Kiel, Germany
| | | | | | - Andreas Humpe
- Division of Stem Cell Transplantation and Immunotherapy; 2nd Department of Medicine; University Hospital Schleswig-Holstein and Christian-Albrechts-University; Kiel, Germany
| | - Thomas Valerius
- Division of Stem Cell Transplantation and Immunotherapy; 2nd Department of Medicine; University Hospital Schleswig-Holstein and Christian-Albrechts-University; Kiel, Germany
| | - Matthias Peipp
- Division of Stem Cell Transplantation and Immunotherapy; 2nd Department of Medicine; University Hospital Schleswig-Holstein and Christian-Albrechts-University; Kiel, Germany
| |
Collapse
|
15
|
Boross P, Lohse S, Nederend M, Jansen JHM, van Tetering G, Dechant M, Peipp M, Royle L, Liew LP, Boon L, van Rooijen N, Bleeker WK, Parren PWHI, van de Winkel JGJ, Valerius T, Leusen JHW. IgA EGFR antibodies mediate tumour killing in vivo. EMBO Mol Med 2013; 5:1213-26. [PMID: 23918228 PMCID: PMC3944462 DOI: 10.1002/emmm.201201929] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 06/06/2013] [Accepted: 06/08/2013] [Indexed: 01/02/2023] Open
Abstract
Currently all approved anti-cancer therapeutic monoclonal antibodies (mAbs) are of the IgG isotype, which rely on Fcgamma receptors (FcγRs) to recruit cellular effector functions. In vitro studies showed that targeting of FcαRI (CD89) by bispecific antibodies (bsAbs) or recombinant IgA resulted in more effective elimination of tumour cells by myeloid effector cells than targeting of FcγR. 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 FcαRI 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 FcαRI. These results support the potential of targeting FcαRI for effective antibody therapy of cancer. The study reveals that IgA antibodies directed against EGFR and engaging Fcalpha receptor (FcαRI) on effector cells, have in vivo anti-cancer activity. These data support the development of novel immunotherapeutic strategies based on targeting FcαRI.
Collapse
Affiliation(s)
- Peter Boross
- Immunotherapy Laboratory, Laboratory for Translational Immunology, UMC Utrecht, Utrecht, The Netherlands
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Brunke C, Lohse S, Derer S, Peipp M, Boross P, Kellner C, Beyer T, Dechant M, Royle L, Liew LP, Leusen JHW, Valerius T. Effect of a tail piece cysteine deletion on biochemical and functional properties of an epidermal growth factor receptor-directed IgA2m(1) antibody. MAbs 2013; 5:936-45. [PMID: 24492345 PMCID: PMC3896607 DOI: 10.4161/mabs.26396] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 09/04/2013] [Accepted: 09/06/2013] [Indexed: 02/06/2023] Open
Abstract
Antibodies of human IgA isotype are critical components of the mucosal immune system, but little is known about their immunotherapeutic potential. Compared with IgG antibodies, IgA molecules carry a C-terminal tail piece extension of 18 amino acids with a free cysteine at position 471. This cysteine is required for the formation of dimeric IgA antibodies, but may impair molecular characteristics of monomeric IgA antibodies as therapeutic reagents. Thus, we generated and characterized a d471-mutated antibody against the epidermal growth factor receptor (EGFR) and compared it to its respective IgA2m(1) wild type antibody. Both wild type and mutated IgA antibodies demonstrated similar EGFR binding and were similarly efficient in inhibiting EGF binding and in blocking EGF-mediated cell proliferation. Recruitment of Fc-mediated effector functions like antibody-dependent cell-mediated cytotoxicity by monocytes, macrophages or PMN was similar, but the d471-mutated IgA exhibited different biochemical properties compared with wild type antibody. As expected, mutated IgA did not form stable dimers in the presence of human joining (J)-chain, but we also observed reduced levels of dimeric aggregates in the absence of J-chain. Furthermore, glycoprofiling revealed different glycosylation patterns for both antibodies, including considerably less mannosylation of d471-mutated antibodies. Overall, our results demonstrate that the deletion of the C-terminal cysteine of IgA2 did not affect the investigated effector functions compared with wild type antibody, but it improved biochemical properties of an IgA2m(1) antibody against EGFR, and may thereby assist in exploring the immunotherapeutic potential of recombinant IgA antibodies.
Collapse
Affiliation(s)
- Christina Brunke
- Division of Stem Cell Transplantation and Immunotherapy, II; Department of Internal Medicine; Christian-Albrechts-University, Kiel, Germany
| | - Stefan Lohse
- Division of Stem Cell Transplantation and Immunotherapy, II; Department of Internal Medicine; Christian-Albrechts-University, Kiel, Germany
| | - Stefanie Derer
- Division of Stem Cell Transplantation and Immunotherapy, II; Department of Internal Medicine; Christian-Albrechts-University, Kiel, Germany
| | - Matthias Peipp
- Division of Stem Cell Transplantation and Immunotherapy, II; Department of Internal Medicine; Christian-Albrechts-University, Kiel, Germany
| | - Peter Boross
- Department of Immunology; Laboratory for Immunotherapy; University Medical Center Utrecht; Utrecht, the Netherlands
| | - Christian Kellner
- Division of Stem Cell Transplantation and Immunotherapy, II; Department of Internal Medicine; Christian-Albrechts-University, Kiel, Germany
| | - Thomas Beyer
- Department of Internal Medicine IV, Nephrology and Hypertension; Christian-Albrechts-University, Kiel, Germany
| | - Michael Dechant
- Department of Internal Medicine IV, Nephrology and Hypertension; Christian-Albrechts-University, Kiel, Germany
| | - Louise Royle
- Ludger Ltd; Culham Science Centre; Oxford, United Kingdom
| | - Li Phing Liew
- Ludger Ltd; Culham Science Centre; Oxford, United Kingdom
| | - Jeanette HW Leusen
- Department of Immunology; Laboratory for Immunotherapy; University Medical Center Utrecht; Utrecht, the Netherlands
| | - Thomas Valerius
- Division of Stem Cell Transplantation and Immunotherapy, II; Department of Internal Medicine; Christian-Albrechts-University, Kiel, Germany
| |
Collapse
|
17
|
Koch T, Derer S, Staudinger M, Rossen K, Glorius P, Peipp M, Kellner C, Kunzendorf U, Valerius T, Dechant M. Antibody-dependent cellular cytotoxicity in patients on chronic hemodialysis. Am J Nephrol 2013; 38:379-87. [PMID: 24157422 DOI: 10.1159/000355972] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 09/24/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND Antibody (Ab)-dependent cellular cytotoxicity (ADCC) is considered to be a relevant mechanism of action of Ab-based tumor therapies. However, knowledge about ADCC capacity of dialysis patients (DP) is limited. The aim of our study was to investigate if ADCC capacity of effector cells obtained from DP differed from those of healthy individuals (HI). METHODS First, we performed ADCC assays with isolated polymorphonuclear cells (PMN) and peripheral blood mononuclear cells (PBMC), mediated by the epidermal growth factor receptor Ab cetuximab or panitumumab. As cetuximab is of human IgG1 and panitumumab of human IgG2 isotype, both Abs differ in their affinity to Fcγ receptors and effector cell recruitment. RESULTS Using PMN as effectors, ADCC levels via panitumumab proved to be higher than via cetuximab, but did not differ between DP and HI. In contrast, IgG2-mediated ADCC with PBMC from DP was significantly enhanced compared to HI. IgG2 Abs predominantly bind to FcγRIIa. Within the PBMC, monocytes are the only cytotoxic cells physiologically expressing this receptor. ADCC experiments with isolated monocytes confirmed them to be the pivotal cells for the observed effect. Analysis of monocytes' Fc receptor expression demonstrated no difference between DP and HI, but monocytes of DP proved to be numerically increased and appeared preactivated. CONCLUSION Our studies implicate that ADCC capacity is not impaired in DP and that it might particularly be reasonable to apply human IgG2 Abs as therapeutics for these patients.
Collapse
Affiliation(s)
- Till Koch
- Department of Internal Medicine IV, Nephrology and Hypertension, Christian Albrechts University, Kiel, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Sekhar SC, Kasai T, Satoh A, Shigehiro T, Mizutani A, Murakami H, El-Aarag BY, Salomon DS, Massaguer A, de Llorens R, Seno M. Identification of caveolin-1 as a potential causative factor in the generation of trastuzumab resistance in breast cancer cells. J Cancer 2013; 4:391-401. [PMID: 23833684 PMCID: PMC3701809 DOI: 10.7150/jca.6470] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 06/17/2013] [Indexed: 12/27/2022] Open
Abstract
The oncogenic tyrosine kinase receptor ErbB2 is a prognostic factor and target for breast cancer therapeutics. In contrast with the other ErbB receptors, ErbB2 is hardly internalized by ligand induced mechanisms, indicating a prevalent surface expression. Elevated levels of ErbB2 in tumor cells are associated with its defective endocytosis and down regulation. Here we show that caveolin-1 expression in breast cancer derived SKBR-3 cells (SKBR-3/Cav-1) facilitates ligand induced ErbB2 endocytosis using an artificial peptide ligand EC-eGFP. Similarly, stimulation with humanized anti ErbB2 antibody Trastuzumab (Herceptin) was found to be internalized and co-localized with caveolin-1 in SKBR-3/Cav-1 cells. Internalized EC-eGFP and Trastuzumab in SKBR-3/Cav-1 cells were then delivered via caveolae to the caveolin-1 containing early endosomes. Consequently, attenuated Fc receptor mediated ADCC functions were observed when exposed to Trastuzumab and EC-Fc (EC-1 peptide conjugated to Fc part of human IgG). On the other hand, this caveolae dependent endocytic synergy was not observed in parental SKBR-3 cells. Therefore, caveolin-1 expression in breast cancer cells could be a predictive factor to estimate how cancer cells are likely to respond to Trastuzumab treatment.
Collapse
Affiliation(s)
- Sreeja C Sekhar
- 1. Division of Chemistry and Biotechnology, Graduate School of Natural Science and Technology, Okayama University, Okayama 7008530, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Rabasa Capote A, González JE, Rodríguez-Vera L, López A, Sánchez Ramírez B, Garrido Hidalgo G. Pharmacokinetics and Biodistribution Study of 7A7 Anti-Mouse Epidermal Growth Factor Receptor Monoclonal Antibody and Its F(ab')(2) Fragment in an Immunocompetent Mouse Model. ISRN PHARMACOLOGY 2012; 2012:417515. [PMID: 23227357 PMCID: PMC3512310 DOI: 10.5402/2012/417515] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 10/23/2012] [Indexed: 11/23/2022]
Abstract
Immunocompetent mice, Fc receptor γ-chain deficient mice (Fcer1g−/−), and molecular tools as F(ab′)2 bivalent fragments appear as the most suitable biological models to study the mechanisms of the action of anti-epidermal growth factor receptor (EGFR) monoclonal antibodies (mAbs). In vivo experiments contrasting antitumor effects of whole Abs and their bivalent fragments commonly involve a previous comparative pharmacokinetics study. In this paper, pharmacokinetics and biodistribution of an anti-mouse EGFR Ab were assessed using immunocompetent mice. 125I-labeled 7A7 mAb holds an elimination half-life (t1/2β) of 23.1 h in C57BL/6 mice. Accumulation of mAb was found in liver, spleen, kidneys, and mostly in lungs. We used an ELISA method to determine the t1/2β of a 7A7 mAb using the same experimental setting. Results from this new analysis revealed a t1/2β of 23.9 h, supporting this method as a safer and easier system to evaluate pharmacokinetics parameters of mAbs targeting mouse EGFR. Using this system we also studied pharmacokinetics of 7A7 F(ab′)2 fragment. A tenfold difference between the mAb and fragment t1/2β was found. These data support the use of the 7A7 F(ab′)2 fragment in in vivo studies to explore the contribution of the EGFR signaling blockade and the Fc region to the antitumor effect of 7A7 mAb in this autologous scenario.
Collapse
Affiliation(s)
- Ailem Rabasa Capote
- Tumor Immunology Direction, Molecular Immunology Institute, Center of Molecular Immunology, 216 Street, 15th Avenue, Atabey, Siboney, Playa, P.O. Box 16040, 11600 Havana, Cuba
| | | | | | | | | | | |
Collapse
|
20
|
Derer S, Bauer P, Lohse S, Scheel AH, Berger S, Kellner C, Peipp M, Valerius T. Impact of epidermal growth factor receptor (EGFR) cell surface expression levels on effector mechanisms of EGFR antibodies. THE JOURNAL OF IMMUNOLOGY 2012; 189:5230-9. [PMID: 23100515 DOI: 10.4049/jimmunol.1202037] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The epidermal growth factor receptor (EGFR) is a widely expressed Ag that is successfully targeted in tumor patients by mAbs or tyrosine kinase inhibitors. A clinical study in non-small cell lung cancer patients demonstrated a positive correlation between EGFR expression levels and the therapeutic efficacy of the EGFR mAb cetuximab. However, the impact of EGFR expression on the different mechanisms of action (MoAs) triggered by the EGFR mAb has not been defined. In this study, BHK-21 cells were stably transfected to express different EGFR levels, which were quantified by immunofluorescence and immunohistochemistry and compared with EGFR levels of clinical non-small cell lung cancer samples. These cells were used to systematically investigate the impact of target Ag expression levels on Fab- or Fc-mediated MoAs of EGFR mAb. A negative correlation between EGFR levels and potency of Fab-mediated MoA was observed. Interestingly, Ab-dependent cell-mediated cytotoxicity (ADCC) by NK cells, monocytes, or polymorphonuclear cells as well as complement-dependent cytotoxicity positively correlated with the number of EGFR molecules. In comparison with ADCC by mononuclear cells, polymorphonuclear cell-mediated ADCC and complement-dependent cytotoxicity required higher EGFR expression levels and higher mAb concentrations to trigger significant tumor cell killing. This correlation between EGFR expression levels and Fc-mediated MoA was confirmed in an independent panel of human tumor cell lines carrying diverse genetic alterations. Furthermore, RNA interference-induced knockdown experiments reinforced the impact of EGFR expression on tumor cell killing by EGFR mAb. In conclusion, these results suggest that EGFR expression levels may determine distinct patterns of MoAs that contribute to the therapeutic efficacy of EGFR mAb.
Collapse
Affiliation(s)
- Stefanie Derer
- Division of Stem Cell Transplantation and Immunotherapy, 2nd Department of Medicine, Christian-Albrechts-University and University Hospital Schleswig-Holstein, 24105 Kiel, Germany
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Oncogenic KRAS impairs EGFR antibodies' efficiency by C/EBPβ-dependent suppression of EGFR expression. Neoplasia 2012; 14:190-205. [PMID: 22496619 DOI: 10.1593/neo.111636] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 02/17/2012] [Accepted: 02/20/2012] [Indexed: 12/29/2022] Open
Abstract
Oncogenic KRAS mutations in colorectal cancer (CRC) are associated with lack of benefit from epidermal growth factor receptor (EGFR)-directed antibody (Ab) therapy. However, the mechanisms by which constitutively activated KRAS (KRAS(G12V)) impairs effector mechanisms of EGFR-Abs are incompletely understood. Here, we established isogenic cell line models to systematically investigate the impact of KRAS(G12V) on tumor growth in mouse A431 xenograft models as well as on various modes of action triggered by EGFR-Abs in vitro. KRAS(G12V) impaired EGFR-Ab-mediated growth inhibition by stimulating receptor-independent downstream signaling. KRAS(G12V) also rendered tumor cells less responsive to Fc-mediated effector mechanisms of EGFR-Abs-such as complement-dependent cytotoxicity (CDC) and Ab-dependent cell-mediated cytotoxicity (ADCC). Impaired CDC and ADCC activities could be linked to reduced EGFR expression in KRAS-mutated versus wild-type (wt) cells, which was restored by small interfering RNA (siRNA)-mediated knockdown of KRAS4b. Immunohistochemistry experiments also revealed lower EGFR expression in KRAS-mutated versus KRAS-wt harboring CRC samples. Analyses of potential mechanisms by which KRAS(G12V) downregulated EGFR expression demonstrated significantly decreased activity of six distinct transcription factors. Additional experiments suggested the CCAAT/enhancer-binding protein (C/EBP) family to be implicated in the regulation of EGFR promoter activity in KRAS-mutated tumor cells by suppressing EGFR transcription through up-regulation of the inhibitory family member C/EBPβ-LIP. Thus, siRNA-mediated knockdown of C/EBPβ led to enhanced EGFR expression and Ab-mediated cytotoxicity against KRAS-mutated cells. Together, these results demonstrate that KRAS(G12V) signaling induced C/EBPβ-dependent suppression of EGFR expression, thereby impairing Fc-mediated effector mechanisms of EGFR-Abs and rendering KRAS-mutated tumor cells less sensitive to these therapeutic agents.
Collapse
|
22
|
Czajkowsky DM, Hu J, Shao Z, Pleass RJ. Fc-fusion proteins: new developments and future perspectives. EMBO Mol Med 2012; 4:1015-28. [PMID: 22837174 PMCID: PMC3491832 DOI: 10.1002/emmm.201201379] [Citation(s) in RCA: 316] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 05/29/2012] [Accepted: 06/15/2012] [Indexed: 12/25/2022] Open
Abstract
Since the first description in 1989 of CD4-Fc-fusion antagonists that inhibit human immune deficiency virus entry into T cells, Fc-fusion proteins have been intensely investigated for their effectiveness to curb a range of pathologies, with several notable recent successes coming to market. These promising outcomes have stimulated the development of novel approaches to improve their efficacy and safety, while also broadening their clinical remit to other uses such as vaccines and intravenous immunoglobulin therapy. This increased attention has also led to non-clinical applications of Fc-fusions, such as affinity reagents in microarray devices. Here we discuss recent results and more generally applicable strategies to improve Fc-fusion proteins for each application, with particular attention to the newer, less charted areas.
Collapse
Affiliation(s)
- Daniel M Czajkowsky
- Key Laboratory of Systems Biomedicine (Ministry of Education) & State Key Laboratory of Oncogenes & Related Genes, Shanghai Jiao Tong University, Shanghai, P. R. China
| | | | | | | |
Collapse
|
23
|
Lohse S, Brunke C, Derer S, Peipp M, Boross P, Kellner C, Beyer T, Dechant M, van der Winkel JGJ, Leusen JHW, Valerius T. Characterization of a mutated IgA2 antibody of the m(1) allotype against the epidermal growth factor receptor for the recruitment of monocytes and macrophages. J Biol Chem 2012; 287:25139-50. [PMID: 22679018 DOI: 10.1074/jbc.m112.353060] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
IgA antibodies constitute an important part of the mucosal immune system, but their immunotherapeutic potential remains rather unexplored, in part due to biotechnological issues. For example, the IgA2m(1) allotype carries an unusual heavy and light chain pairing, which may confer production and stability concerns. Here, we report the generation and the biochemical and functional characterization of a P221R-mutated IgA2m(1) antibody against the epidermal growth factor receptor (EGFR). Compared with wild type, the mutated antibody demonstrated heavy chains covalently linked to light chains in monomeric as well as in joining (J)-chain containing dimeric IgA. Functional studies with wild type and mutated IgA2m(1) revealed similar binding to EGFR and direct effector functions such as EGFR down-modulation and growth inhibition. Furthermore, both IgA molecules triggered similar levels of indirect tumor cell killing such as antibody-dependent cell-mediated cytotoxicity (ADCC) by isolated monocytes, activated polymorphonuclear cells, and human whole blood. Interestingly, the dimeric IgA antibodies demonstrated higher efficiency in direct as well as in indirect effector mechanisms compared with their respective monomeric forms. Both wild type and mutated antibody triggered effective FcαRI-mediated tumor cell killing by macrophages already at low effector to target cell ratios. Interestingly, also polarized macrophages mediated significant IgA2-mediated ADCC. M2 macrophages, which have been described as promoting tumor growth and progression, may convert to ADCC-mediating effector cells in the presence of EGFR-directed antibodies. In conclusion, these results provide further insight into the immunotherapeutic potential of recombinant IgA antibodies for tumor immunotherapy and suggest macrophages as an additional effector cell population.
Collapse
Affiliation(s)
- Stefan Lohse
- Division of Stem Cell Transplantation and Immunotherapy, Department of Internal Medicine II, Christian-Albrechts-University, Schittenhelmstrasse 12, 24105 Kiel, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Krippendorff BF, Oyarzún DA, Huisinga W. Predicting the F(ab)-mediated effect of monoclonal antibodies in vivo by combining cell-level kinetic and pharmacokinetic modelling. J Pharmacokinet Pharmacodyn 2012; 39:125-39. [PMID: 22399130 PMCID: PMC3333800 DOI: 10.1007/s10928-012-9243-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 02/09/2012] [Indexed: 01/09/2023]
Abstract
Cell-level kinetic models for therapeutically relevant processes increasingly benefit the early stages of drug development. Later stages of the drug development processes, however, rely on pharmacokinetic compartment models while cell-level dynamics are typically neglected. We here present a systematic approach to integrate cell-level kinetic models and pharmacokinetic compartment models. Incorporating target dynamics into pharmacokinetic models is especially useful for the development of therapeutic antibodies because their effect and pharmacokinetics are inherently interdependent. The approach is illustrated by analysing the F(ab)-mediated inhibitory effect of therapeutic antibodies targeting the epidermal growth factor receptor. We build a multi-level model for anti-EGFR antibodies by combining a systems biology model with in vitro determined parameters and a pharmacokinetic model based on in vivo pharmacokinetic data. Using this model, we investigated in silico the impact of biochemical properties of anti-EGFR antibodies on their F(ab)-mediated inhibitory effect. The multi-level model suggests that the F(ab)-mediated inhibitory effect saturates with increasing drug-receptor affinity, thereby limiting the impact of increasing antibody affinity on improving the effect. This indicates that observed differences in the therapeutic effects of high affinity antibodies in the market and in clinical development may result mainly from Fc-mediated indirect mechanisms such as antibody-dependent cell cytotoxicity.
Collapse
Affiliation(s)
- Ben-Fillippo Krippendorff
- Pharmacology & Drug Development Group, Department of Oncology, Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, CB2 0RE UK
| | - Diego A. Oyarzún
- Centre for Synthetic Biology and Innovation, Department of Bioengineering, Imperial College London, London, SW7 2AZ UK
| | - Wilhelm Huisinga
- Institut für Mathematik, Universität Potsdam, Wissenschaftspark Golm, 14476 Potsdam, Germany
| |
Collapse
|
25
|
Alvarenga ML, Kikhney J, Hannewald J, Metzger AU, Steffens KJ, Bomke J, Krah A, Wegener A. In-depth biophysical analysis of interactions between therapeutic antibodies and the extracellular domain of the epidermal growth factor receptor. Anal Biochem 2011; 421:138-51. [PMID: 22085444 DOI: 10.1016/j.ab.2011.10.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 10/21/2011] [Accepted: 10/22/2011] [Indexed: 12/12/2022]
Abstract
Targeting of the epidermal growth factor receptor (EGFR) with monoclonal antibodies has become an established antitumor strategy in clinical use or in late stages of drug development. The mAbs effector mechanisms have been widely analyzed based on in vivo or cell studies. Hereby we intend to complement these functional studies by investigating the mAb-EGFR interactions on a molecular level. Surface plasmon resonance, isothermal titration calorimetry, and static light scattering were employed to characterize the interactions of matuzumab, cetuximab, and panitumumab with the extracellular soluble form ecEGFR. The kinetic and thermodynamic determinants dissected the differences in mAbs binding mechanism toward ecEGFR. The quantitative stoichiometric data clearly demonstrated the bivalent binding of the mAbs to two ecEGFR molecules. Our results complement earlier studies on simultaneous binding of cetuximab and matuzumab. The antibodies retain their bivalent binding mode achieving a 1:2:1 complex formation. Interestingly the binding parameters remain nearly constant for the individual antibodies in this ternary assembly. In contrast the binding of panitumumab is almost exclusive either by directly blocking the accessibility for the second antibody or by negative allosteric modulation. Overall we provide a comprehensive biophysical dataset on binding parameters, the complex assembly, and relative epitope accessibility for therapeutic anti-EGFR antibodies.
Collapse
|
26
|
Wittinger M, Vanhara P, El-Gazzar A, Savarese-Brenner B, Pils D, Anees M, Grunt TW, Sibilia M, Holcmann M, Horvat R, Schemper M, Zeillinger R, Schöfer C, Dolznig H, Horak P, Krainer M. hVps37A Status affects prognosis and cetuximab sensitivity in ovarian cancer. Clin Cancer Res 2011; 17:7816-27. [PMID: 22016507 DOI: 10.1158/1078-0432.ccr-11-0408] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Although prognostic and predictive factors in ovarian cancer have been extensively studied for decades, only few have been identified and introduced to clinical practice. Here, we evaluate hVps37A (HCRP1) as a possible novel predictive marker for ovarian cancer. hVps37A was originally described as a member of the membrane-trafficking ESCRT-I complex mediating the internalization and degradation of ubiquitinated membrane receptors. EXPERIMENTAL DESIGN We analyzed an ovarian cancer tissue microarray for HCRP1, EGFR, and HER2 expression. We used a tetracycline inducible ovarian cancer cell culture model to show the effects of hVps37A knockdown in vitro and in vivo. In addition, we studied the effects of epidermal growth factor receptor (EGFR) inhibitors cetuximab and lapatinib on ovarian cancer cells under conditions of hVps37A knockdown. RESULTS We find that hVps37A is significantly downregulated in ovarian cancer and modifies the prognostic value of EGFR and HER2 expression. In addition, hVps37A downregulation in ovarian cancer cells leads to cytoplasmic pEGFR retention and hyperactivation of downstream pathways and is associated with enhanced xenograft growth in nude mice and invasion of the collagen matrix. Furthermore, due to subsequent sustained Akt- and MAPK-pathway activation, hVps37A-deficient cells become irresponsive to inhibition by the therapeutic antibody cetuximab. CONCLUSION We propose that hVps37A status could become a novel prognostic and therapeutic marker for EGFR or HER2 driven tumors.
Collapse
MESH Headings
- Animals
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/therapeutic use
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Blotting, Western
- Cell Culture Techniques
- Cell Line, Tumor
- Cell Proliferation/drug effects
- Cetuximab
- Endosomal Sorting Complexes Required for Transport/genetics
- Endosomal Sorting Complexes Required for Transport/metabolism
- ErbB Receptors/metabolism
- Female
- Gene Expression Regulation, Neoplastic
- Humans
- Immunohistochemistry
- Kaplan-Meier Estimate
- Lapatinib
- Mice
- Mice, Nude
- Ovarian Neoplasms/drug therapy
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/pathology
- Prognosis
- Quinazolines/pharmacology
- RNA Interference
- Receptor, ErbB-2/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Tissue Array Analysis
- Xenograft Model Antitumor Assays/methods
Collapse
Affiliation(s)
- Michael Wittinger
- Department of Internal Medicine I, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Klausz K, Berger S, Lammerts van Bueren JJ, Derer S, Lohse S, Dechant M, van de Winkel JGJ, Peipp M, Parren PWHI, Valerius T. Complement-mediated tumor-specific cell lysis by antibody combinations targeting epidermal growth factor receptor (EGFR) and its variant III (EGFRvIII). Cancer Sci 2011; 102:1761-8. [DOI: 10.1111/j.1349-7006.2011.02019.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
|
28
|
Bradbury ARM, Sidhu S, Dübel S, McCafferty J. Beyond natural antibodies: the power of in vitro display technologies. Nat Biotechnol 2011; 29:245-54. [PMID: 21390033 PMCID: PMC3057417 DOI: 10.1038/nbt.1791] [Citation(s) in RCA: 407] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In vitro display technologies, best exemplified by phage and yeast display, were first described for the selection of antibodies some 20 years ago. Since then, many antibodies have been selected and improved upon using these methods. Although it is not widely recognized, many of the antibodies derived using in vitro display methods have properties that would be extremely difficult, if not impossible, to obtain by immunizing animals. The first antibodies derived using in vitro display methods are now in the clinic, with many more waiting in the wings. Unlike immunization, in vitro display permits the use of defined selection conditions and provides immediate availability of the sequence encoding the antibody. The amenability of in vitro display to high-throughput applications broadens the prospects for their wider use in basic and applied research.
Collapse
|
29
|
Krumbach R, Schüler J, Hofmann M, Giesemann T, Fiebig HH, Beckers T. Primary resistance to cetuximab in a panel of patient-derived tumour xenograft models: activation of MET as one mechanism for drug resistance. Eur J Cancer 2011; 47:1231-43. [PMID: 21273060 DOI: 10.1016/j.ejca.2010.12.019] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Revised: 12/08/2010] [Accepted: 12/15/2010] [Indexed: 02/07/2023]
Abstract
Cetuximab (Erbitux®) targets the epidermal growth factor receptor (EGFR) and is approved for treatment of colorectal and head and neck cancer. Despite wide expression of EGFR, only a subgroup of cancer patients responds to cetuximab therapy. In the present study we assessed the cetuximab response in vivo of 79 human patient-derived xenografts originating from five tumour histotypes. We analysed basic tumour characteristics including EGFR expression and activation, mutational status of KRAS, BRAF and NRAS, the expression of EGFR ligands and the activation of HER3 (ErbB3) and the hepatocyte growth factor receptor MET. Based on these results, a cetuximab response score including positive and negative factors affecting therapeutic response is proposed. Positive factors are high expression and activation of EGFR and its ligands epiregulin or amphiregulin, negative factors are markers for downstream pathway activation independent of EGFR. In cetuximab resistant NSCL adenocarcinoma LXFA 526 and LXFA 1647, overexpression due to gene amplification and strong activation of MET was identified. Knock-down of MET by siRNA in the corresponding cell lines showed that anchorage-independent growth and migration are dependent on MET. MET knock down sensitized LXFA 526L and LXFA 1647L to EGF. Combined treatments of a MET inhibitor and cetuximab were additive. Therefore, combination therapy of cetuximab and a MET inhibitor in selected lung cancer patients could be of high clinical significance.
Collapse
Affiliation(s)
- Rebekka Krumbach
- Oncotest GmbH, Institute for Experimental Oncology, Am Flughafen 12-14, 79108 Freiburg, Germany
| | | | | | | | | | | |
Collapse
|
30
|
Isolation of a human anti-epidermal growth factor receptor Fab antibody, EG-19-11, with subnanomolar affinity from naïve immunoglobulin repertoires using a hierarchical antibody library system. Immunol Lett 2010; 134:55-61. [DOI: 10.1016/j.imlet.2010.08.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 08/07/2010] [Accepted: 08/17/2010] [Indexed: 11/20/2022]
|
31
|
Beck A, Wagner-Rousset E, Wurch T, Corvaia N. [Therapeutic antibodies and related products: choosing the right structure for success]. Med Sci (Paris) 2010; 25:1024-32. [PMID: 20035674 DOI: 10.1051/medsci/200925121024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Monoclonal antibodies (mAb) and related-products represent the fastest growing class of therapeutics in the biotechnological and pharmaceutical industry. In just as short as 20 years, more than 30 immunoglobulins (IgG) and derivatives have been approved in a wide range of indications (oncology, inflammation and auto-immunity, transplantation, angioplasty, hematology, ophthalmology, viral infections, allergy). The mAb structure toolbox contains mouse, chimeric, humanized and human antibodies from different isotypes (IgG1, 2 and 4), as well as IgG-related products (immunoconjugates, radio-immunoconjugates, Fab fragments, Fc-fusion proteins and peptides, bispecifics). Furthermore from a structural point of view, mAb glycosylation is linked to their production systems and may impact on their effector functions and immunogenicity. Based on the current knowledge, choosing the right antibody format, isotype and glycosylation profile are some of the key issues to address early during the lead selection.
Collapse
Affiliation(s)
- Alain Beck
- Centre d'immunologie Pierre Fabre (www.cipf.com), 5, avenue Napoléon III, 74160 Saint-Julien-en-Genevois, France.
| | | | | | | |
Collapse
|
32
|
Schlaeth M, Berger S, Derer S, Klausz K, Lohse S, Dechant M, Lazar GA, Schneider-Merck T, Peipp M, Valerius T. Fc-engineered EGF-R antibodies mediate improved antibody-dependent cellular cytotoxicity (ADCC) against KRAS-mutated tumor cells. Cancer Sci 2010; 101:1080-8. [PMID: 20331636 PMCID: PMC11158590 DOI: 10.1111/j.1349-7006.2010.01505.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Oncogenic mutations of the KRAS gene have emerged as a common mechanism of resistance against epidermal growth factor receptor (EGF-R)-directed tumor therapy. Mutated KRAS leads to ligand-independent activation of signaling pathways downstream of EGF-R. Thereby, direct effector mechanisms of EGF-R antibodies, such as blockade of ligand binding and inhibition of signaling, are bypassed. Thus, a humanized variant of the approved EGF-R antibody Cetuximab inhibited growth of wild-type KRAS-expressing A431 cells, but did not inhibit KRAS-mutated A549 tumor cells. We then investigated whether killing of tumor cells harboring mutated KRAS can be improved by enhancing antibody-dependent cellular cytotoxicity (ADCC). Protein- and glyco-engineering of antibodies' Fc region are established technologies to enhance ADCC by increasing antibodies' affinity to activating Fcgamma receptors. Thus, EGF-R antibody variants with increased affinity for the natural killer (NK) cell-expressed FcgammaRIIIa (CD16) were generated and analyzed. These variants triggered significantly enhanced mononuclear cell (MNC)-mediated killing of KRAS-mutated tumor cells compared to wild-type antibodies. Additionally, cells transfected with mutated KRAS were killed as effectively by ADCC as vector-transfected control cells. Together, these data demonstrate that KRAS mutations are not sufficient to render tumor cells resistant to ADCC. Consequently Fc-engineered EGF-R antibodies may prove effective against KRAS-mutated tumors, which are not susceptible to signaling inhibition by EGF-R antibodies.
Collapse
Affiliation(s)
- Martin Schlaeth
- Section for Stem Cell Transplantation and Immunotherapy, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Kiel, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Schneider-Merck T, Lammerts van Bueren JJ, Berger S, Rossen K, van Berkel PH, Derer S, Beyer T, Lohse S, Bleeker WK, Peipp M, Parren PWHI, van de Winkel JGJ, Valerius T, Dechant M. Human IgG2 Antibodies against Epidermal Growth Factor Receptor Effectively Trigger Antibody-Dependent Cellular Cytotoxicity but, in Contrast to IgG1, Only by Cells of Myeloid Lineage. THE JOURNAL OF IMMUNOLOGY 2009; 184:512-20. [DOI: 10.4049/jimmunol.0900847] [Citation(s) in RCA: 178] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
34
|
Peipp M, Dechant M, Valerius T. Sensitivity and resistance to EGF-R inhibitors: approaches to enhance the efficacy of EGF-R antibodies. MAbs 2009; 1:590-9. [PMID: 20068398 PMCID: PMC2791317 DOI: 10.4161/mabs.1.6.10051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2009] [Accepted: 09/11/2009] [Indexed: 01/24/2023] Open
Abstract
The epidermal growth factor receptor (EGF-R) constitutes one of the most broadly targeted antigens in tumor therapy since it is commonly expressed on many epithelial cancers, as well as on glioblastomas. Both EGF-R-directed tyrosine kinase inhibitors and monoclonal antibodies have been approved, but clinical response rates are often limited. A more detailed understanding of the mechanisms underlying sensitivity or resistance against EGF-R inhibitors may assist in identifying patient populations who optimally benefit from currently available reagents. In addition, these insights may guide the development of more effective molecules. In this short review, we will summarize some of the current knowledge in this rapidly evolving field with particular emphasis on EGF-R-directed antibodies.
Collapse
Affiliation(s)
- Matthias Peipp
- Division of Stem Cell Transplantation and Immunotherapy; University Hospital Schleswig-Holstein and Christian-Albrechts University; Kiel, Germany
| | - Michael Dechant
- Division of Nephrology and Hypertension; University Hospital Schleswig-Holstein and Christian-Albrechts University; Kiel, Germany
| | - Thomas Valerius
- Division of Stem Cell Transplantation and Immunotherapy; University Hospital Schleswig-Holstein and Christian-Albrechts University; Kiel, Germany
| |
Collapse
|
35
|
Huang L, De Baetselier P, Beyaert R. Targeting the EGF receptor ectodomain in the context of cancer. Expert Opin Ther Targets 2009; 13:1347-61. [DOI: 10.1517/14728220903277264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
36
|
Hughes JB, Berger C, Rødland MS, Hasmann M, Stang E, Madshus IH. Pertuzumab increases epidermal growth factor receptor down-regulation by counteracting epidermal growth factor receptor-ErbB2 heterodimerization. Mol Cancer Ther 2009; 8:1885-92. [PMID: 19584234 DOI: 10.1158/1535-7163.mct-09-0291] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Epidermal growth factor receptor (EGFR) and ErbB2 readily form heterodimers when both are expressed in the same cell and the EGFR is activated by one of its ligands. Our data show that such heterodimers are constitutively formed also in a ligand-independent manner on overexpression of EGFR and ErbB2 in porcine aortic endothelial cells. Interestingly, cross-linking experiments showed that incubation with the antibody pertuzumab, which has been shown to bind the dimerization arm of ErbB2, resulted in dissolution of EGFR-ErbB2 heterodimers. Incubation with pertuzumab also increased the amount of EGF-induced EGFR homodimers, and under these conditions, endocytosis of radiolabeled EGF was increased. This increase was significant, although slightly more EGF was internalized in cells expressing EGFR only compared with pertuzumab-treated cells expressing both EGFR and ErbB2. By confocal microscopy analysis, more EGF was observed in endosomes on incubation with pertuzumab, and under similar conditions, immunoblotting experiments showed increased EGFR degradation on incubation with both EGF and pertuzumab. These results show that pertuzumab enhanced the endocytic down-regulation of EGFR by counteracting EGFR-ErbB2 heterodimerization. Our previous results showing that ErbB2 counteracts EGFR endocytosis can therefore be explained by tethering of EGFR to ErbB2 at the plasma membrane.
Collapse
|
37
|
Recombinant antibody therapeutics: the impact of glycosylation on mechanisms of action. Trends Pharmacol Sci 2009; 30:356-62. [DOI: 10.1016/j.tips.2009.04.007] [Citation(s) in RCA: 265] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 04/15/2009] [Accepted: 04/15/2009] [Indexed: 01/20/2023]
|
38
|
Schmitz KR, Ferguson KM. Interaction of antibodies with ErbB receptor extracellular regions. Exp Cell Res 2008; 315:659-70. [PMID: 18992239 DOI: 10.1016/j.yexcr.2008.10.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2008] [Revised: 10/07/2008] [Accepted: 10/07/2008] [Indexed: 12/11/2022]
Abstract
Antibodies to the extracellular region of the ErbB receptors have played key roles in the development of a mechanistic understanding of this family of receptor tyrosine kinases. An extensively studied class of such antibodies inhibits activation of ErbB receptors, and these antibodies have been the focus of intense development as anti-cancer agents. In this review we consider the properties of ErbB receptors antibodies in light of the current structure-based model for ErbB receptor homo- and hetero-dimerization and activation. Crystal structures of the Fab fragments from five different inhibitory antibodies in complex with the extracellular regions of EGFR and ErbB2 have been determined. These structures highlight several different modes of binding and mechanisms of receptor inhibition. Information about antibody interactions with the structurally well-characterized soluble extracellular regions of ErbB receptors can be combined with the rich knowledge of the effects of these antibodies in cultured cells, and in vivo, to provide insights into the conformation and activation of ErbB receptors at the cell surface.
Collapse
Affiliation(s)
- Karl R Schmitz
- Department of Physiology, University of Pennsylvania School of Medicine, B400 Richards Building, 3700 Hamilton Walk, Philadelphia, PA 19104-6085, USA
| | | |
Collapse
|