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Panaampon J, Sungwan P, Fujikawa S, Sampattavanich S, Jirawatnotai S, Okada S. Trastuzumab, a monoclonal anti-HER2 antibody modulates cytotoxicity against cholangiocarcinoma via multiple mechanisms. Int Immunopharmacol 2024; 138:112612. [PMID: 38968862 DOI: 10.1016/j.intimp.2024.112612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/16/2024] [Accepted: 06/30/2024] [Indexed: 07/07/2024]
Abstract
Cholangiocarcinoma (CCA) is an aggressive and fatal cancer. The prognosis is very poor and no optimal chemotherapy has been established. Human epidermal growth factor receptor 2 (HER2, neu, and erbB2) is highly-expressed in breast cancer and is expressed in many other tumors but poorly expressed in CCA. The anti-HER2 antibody, trastuzumab, has been used for the treatment of HER2-positive breast and gastric cancer. In this study, we examined the surface expression of HER2 on seven Thai liver-fluke-associated CCA cell lines by flow cytometry, and found all of these CCA cells were weakly positive for HER2. MTT assay revealed that trastuzumab directly suppressed the growth of CCA. By using FcR-bearing recombinant Jurkat T-cell-expressing firefly luciferase gene under the control of NFAT response elements, we defined the activities of antibody-dependent cytotoxicity (ADCC) and antibody-dependent cell phagocytosis (ADCP). ADCC was confirmed by using expanded NK cells. ADCP was confirmed by using mouse peritoneal macrophages and human monocyte-derived macrophages as effector cells. Rabbit serum was administered to test the complement-dependent cytotoxicity (CDC) activity of trastuzumab. Finally, we evaluated the efficacy of trastuzumab in in vivo patient-derived cell xenograft and patient-derived xenograft (PDX) models. Our results showed that a distinct population of CCA (liver-fluke-associated CCA) expressed HER2. Trastuzumab demonstrated a potent inhibitory effect on even HER2 weakly positive CCA both in vitro and in vivo via multiple mechanisms. Thus, HER2 is a promising target in anti-CCA therapy, and trastuzumab can be considered a promising antibody immunotherapy agent for the treatment of CCA.
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Affiliation(s)
- Jutatip Panaampon
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan; Division of Hematologic Neoplasia, Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Medicine, Harvard Medical School, Boston, MA 02215, USA
| | - Prin Sungwan
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan
| | - Sawako Fujikawa
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan
| | - Somponnat Sampattavanich
- Siriraj Center of Research Excellence for Precision Medicine and Systems Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Department of Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Siwanon Jirawatnotai
- Siriraj Center of Research Excellence for Precision Medicine and Systems Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Department of Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Seiji Okada
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan; Institute of Industrial Nanomaterials, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan.
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2
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Manabe S, Iwamoto S, Nagatoishi S, Hoshinoo A, Mitani A, Sumiyoshi W, Kinoshita T, Yamaguchi Y, Tsumoto K. Systematic Preparation of a 66-IgG Library with Symmetric and Asymmetric Homogeneous Glycans and Their Functional Evaluation. J Am Chem Soc 2024; 146:23426-23436. [PMID: 39106493 DOI: 10.1021/jacs.4c06558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
Immunoglobulin G (IgG) antibodies possess a conserved N-glycosylation site in the Fc domain. In FcγRIIIa affinity column chromatography, unglycosylated, hemiglycosylated, and fully glycosylated IgG retention times differ considerably. Using retention-time differences, 66 different trastuzumab antibodies with symmetric and asymmetric homogeneous glycans were prepared systematically, substantially expanding the scope of IgGs with homogeneous glycans. Using the prepared trastuzumab with homogeneous glycans, thermal stability and antibody-dependent cellular cytotoxicity were investigated. In some glycan series, a directly proportional relationship was observed between the thermal unfolding temperature (Tm) and the calorimetric unfolding heat (ΔHcal). Antibody function could be deduced from the combination of a pair of glycans in an intact form. Controlling glycan structure through the combination of a pair of glycans permits the precise tuning of stability and effector functions of IgG. Overall, our technology can be used to investigate the effects of glycans on antibody functions.
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Affiliation(s)
- Shino Manabe
- School of Pharmacy and Pharmaceutical Sciences and Institute of Medicinal Chemistry, Hoshi University, Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
- Research Center for Pharmaceutical Development, Graduate School of Pharmaceutical Sciences & Faculty of Pharmaceutical Sciences, Tohoku University, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Shogo Iwamoto
- Fushimi Pharmaceutical Co., Ltd., Nakazu, Marugame, Kagawa 763-8605, Japan
| | - Satoru Nagatoishi
- Medical Device Development and Regulation Research Center, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Department of Bioengineering, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Asako Hoshinoo
- Fushimi Pharmaceutical Co., Ltd., Nakazu, Marugame, Kagawa 763-8605, Japan
| | - Ai Mitani
- Fushimi Pharmaceutical Co., Ltd., Nakazu, Marugame, Kagawa 763-8605, Japan
| | - Wataru Sumiyoshi
- Fushimi Pharmaceutical Co., Ltd., Nakazu, Marugame, Kagawa 763-8605, Japan
| | - Takashi Kinoshita
- Fushimi Pharmaceutical Co., Ltd., Nakazu, Marugame, Kagawa 763-8605, Japan
| | - Yoshiki Yamaguchi
- Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Komatsushima, Aoba-ku, Sendai, Miyagi 980-8558, Japan
| | - Kouhei Tsumoto
- Medical Device Development and Regulation Research Center, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Department of Bioengineering, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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3
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Mackin SR, Sariol A, Diamond MS. Antibody-mediated control mechanisms of viral infections. Immunol Rev 2024. [PMID: 39162394 DOI: 10.1111/imr.13383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/21/2024]
Abstract
Antibodies generated after vaccination or natural pathogen exposure are essential mediators of protection against many infections. Most studies with viruses have focused on antibody neutralization, in which protection is conferred by the fragment antigen binding region (Fab) through targeting of different steps in the viral lifecycle including attachment, internalization, fusion, and egress. Beyond neutralization, the fragment crystallizable (Fc) region of antibodies can integrate innate and adaptive immune responses by engaging complement components and distinct Fc gamma receptors (FcγR) on different host immune cells. In this review, we discuss recent advances in our understanding of antibody neutralization and Fc effector functions, and the assays used to measure them. Additionally, we describe the contexts in which these mechanisms are associated with protection against viruses and highlight how Fc-FcγR interactions can improve the potency of antibody-based therapies.
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Affiliation(s)
- Samantha R Mackin
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Pathology & Immunology and Center for Genome Sciences, Lab & Genomic Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Alan Sariol
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Michael S Diamond
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Pathology & Immunology and Center for Genome Sciences, Lab & Genomic Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, USA
- Andrew M. and Jane M. Bursky the Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, Missouri, USA
- Center for Vaccines and Immunity to Microbial Pathogens, Washington University School of Medicine, St. Louis, Missouri, USA
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4
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Moquist PN, Zhang X, Leiske CI, Eng-Duncan NML, Zeng W, Bindman NA, Wo SW, Wong A, Henderson CM, Crowder K, Lyon R, Doronina SO, Senter PD, Neff-LaFord HD, Sussman D, Gardai SJ, Levengood MR. Reversible Chemical Modification of Antibody Effector Function Mitigates Unwanted Systemic Immune Activation. Bioconjug Chem 2024; 35:855-866. [PMID: 38789102 PMCID: PMC11191404 DOI: 10.1021/acs.bioconjchem.4c00212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 05/13/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024]
Abstract
Antibody effector functions including antibody-dependent cellular cytotoxicity (ADCC) and phagocytosis (ADCP) are mediated through the interaction of the antibody Fc region with Fcγ receptors present on immune cells. Several approaches have been used to modulate antibody Fc-Fcγ interactions with the goal of driving an effective antitumor immune response, including Fc point mutations and glycan modifications. However, robust antibody-Fcγ engagement and immune cell binding of Fc-enhanced antibodies in the periphery can lead to the unwanted induction of systemic cytokine release and other dose-limiting infusion-related reactions. Creating a balance between effective engagement of Fcγ receptors that can induce antitumor activity without incurring systemic immune activation is an ongoing challenge in the field of antibody and immuno-oncology therapeutics. Herein, we describe a method for the reversible chemical modulation of antibody-Fcγ interactions using simple poly(ethylene glycol) (PEG) linkers conjugated to antibody interchain disulfides with maleimide attachments. This method enables dosing of a therapeutic with muted Fcγ engagement that is restored in vivo in a time-dependent manner. The technology was applied to an effector function enhanced agonist CD40 antibody, SEA-CD40, and experiments demonstrate significant reductions in Fc-induced immune activation in vitro and in mice and nonhuman primates despite showing retained efficacy and improved pharmacokinetics compared to the parent antibody. We foresee that this simple, modular system can be rapidly applied to antibodies that suffer from systemic immune activation due to peripheral FcγR binding immediately upon infusion.
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Affiliation(s)
- Philip N. Moquist
- ADC
Chemistry, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United states
| | - Xinqun Zhang
- ADC
Antibody Engineering, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Chris I. Leiske
- ADC
Antibody Engineering, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | | | - Weiping Zeng
- ADC
In Vivo Pharmacology, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Noah A. Bindman
- ADC
Antibody Engineering, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Serena W. Wo
- ADC
Antibody Engineering, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Abbie Wong
- ADC
Translational Sciences, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Clark M. Henderson
- ADC
Translational Sciences, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Karalyne Crowder
- Non-Clinical
Sciences, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Robert Lyon
- ADC
Antibody Engineering, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Svetlana O. Doronina
- ADC
Chemistry, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United states
| | - Peter D. Senter
- ADC
Chemistry, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United states
| | - Haley D. Neff-LaFord
- Non-Clinical
Sciences, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Django Sussman
- ADC
Antibody Engineering, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
| | - Shyra J. Gardai
- Immunology, Pfizer,
Inc., 21823 30th Dr.
SE, Bothell, Washington 98021, United States
| | - Matthew R. Levengood
- ADC
Antibody Engineering, Pfizer, Inc., 21823 30th Dr. SE, Bothell, Washington 98021, United States
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5
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Schwedler JL, Stefan MA, Thatcher CE, McIlroy PR, Sinha A, Phillips AM, Sumner CA, Courtney CM, Kim CY, Weilhammer DR, Harmon B. Therapeutic efficacy of a potent anti-Venezuelan equine encephalitis virus antibody is contingent on Fc effector function. MAbs 2024; 16:2297451. [PMID: 38170638 PMCID: PMC10766394 DOI: 10.1080/19420862.2023.2297451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 12/15/2023] [Indexed: 01/05/2024] Open
Abstract
The development of specific, safe, and potent monoclonal antibodies (Abs) has led to novel therapeutic options for infectious disease. In addition to preventing viral infection through neutralization, Abs can clear infected cells and induce immunomodulatory functions through engagement of their crystallizable fragment (Fc) with complement proteins and Fc receptors on immune cells. Little is known about the role of Fc effector functions of neutralizing Abs in the context of encephalitic alphavirus infection. To determine the role of Fc effector function in therapeutic efficacy against Venezuelan equine encephalitis virus (VEEV), we compared the potently neutralizing anti-VEEV human IgG F5 (hF5) Ab with intact Fc function (hF5-WT) or containing the loss of function Fc mutations L234A and L235A (hF5-LALA) in the context of VEEV infection. We observed significantly reduced binding to complement and Fc receptors, as well as differential in vitro kinetics of Fc-mediated cytotoxicity for hF5-LALA compared to hF5-WT. The in vivo efficacy of hF5-LALA was comparable to hF5-WT at -24 and + 24 h post infection, with both Abs providing high levels of protection. However, when hF5-WT and hF5-LALA were administered + 48 h post infection, there was a significant decrease in the therapeutic efficacy of hF5-LALA. Together these results demonstrate that optimal therapeutic Ab treatment of VEEV, and possibly other encephalitic alphaviruses, requires neutralization paired with engagement of immune effectors via the Fc region.
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Affiliation(s)
- Jennifer L. Schwedler
- Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA
| | - Maxwell A. Stefan
- Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA
| | - Christine E. Thatcher
- Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA
| | - Peter R. McIlroy
- Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA
| | - Anupama Sinha
- Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA
| | - Ashlee M. Phillips
- Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, CA, USA
| | - Christopher A. Sumner
- Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA
| | - Colleen M. Courtney
- Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA
| | - Christina Y. Kim
- Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA
| | - Dina R. Weilhammer
- Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, CA, USA
| | - Brooke Harmon
- Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA
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6
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Huang HW, Shivatare VS, Tseng TH, Wong CH. Cell-based production of Fc-GlcNAc and Fc-alpha-2,6 sialyl glycan enriched antibody with improved effector functions through glycosylation pathway engineering. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.18.572280. [PMID: 38187613 PMCID: PMC10769250 DOI: 10.1101/2023.12.18.572280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Glycosylation of antibody plays an important role in Fc-mediated killing of tumor cells and virus-infected cells through effector functions such as antibody-dependent cellular cytotoxicity (ADCC), antibody dependent cell-mediated phagocytosis (ADCP) and vaccinal effect. Previous studies showed that therapeutical humanized antibodies with α2-6 sialyl complex type (SCT) glycan attached to Fc-Asn297 exhibited optimal binding to the Fc receptors on effector cells associated with ADCC, ADCP and vaccinal effect. However, the production of antibodies with homogeneous Fc-SCT needs multiple in vitro enzymatic and purification steps. In this study, we report two different approaches to shorten the processes to produce SCT-enriched antibodies. First, we expressed a bacterial endoglycosidase in GNT1-KO EXPI293 cells to trim all N -glycans to mono-GlcNAc glycoforms for in vitro transglycosylation to generate homogeneous SCT antibody. Second, we engineered the glycosylation pathway of HEK293 cells through knockout of the undesired glycosyltransferases and expression of the desired glycosyltransferases to produce SCT enriched antibodies with similar binding affinity to Fc receptors and ADCC activity to homogenous SCT antibody.
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7
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Struble EB, Rawson JMO, Stantchev T, Scott D, Shapiro MA. Uses and Challenges of Antiviral Polyclonal and Monoclonal Antibody Therapies. Pharmaceutics 2023; 15:pharmaceutics15051538. [PMID: 37242780 DOI: 10.3390/pharmaceutics15051538] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/04/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Viral diseases represent a major public health concerns and ever-present risks for developing into future pandemics. Antiviral antibody therapeutics, either alone or in combination with other therapies, emerged as valuable preventative and treatment options, including during global emergencies. Here we will discuss polyclonal and monoclonal antiviral antibody therapies, focusing on the unique biochemical and physiological properties that make them well-suited as therapeutic agents. We will describe the methods of antibody characterization and potency assessment throughout development, highlighting similarities and differences between polyclonal and monoclonal products as appropriate. In addition, we will consider the benefits and challenges of antiviral antibodies when used in combination with other antibodies or other types of antiviral therapeutics. Lastly, we will discuss novel approaches to the characterization and development of antiviral antibodies and identify areas that would benefit from additional research.
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Affiliation(s)
- Evi B Struble
- Division of Plasma Derivatives, Office of Plasma Protein Therapeutics CMC, Office of Therapeutic Products, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Jonathan M O Rawson
- Division of Antivirals, Office of Infectious Diseases, Office of New Drugs, Center for Drug Evaluation and Research, United States Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Tzanko Stantchev
- Division of Biotechnology Review and Research 1, Office of Biotechnology Products, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, United States Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Dorothy Scott
- Division of Plasma Derivatives, Office of Plasma Protein Therapeutics CMC, Office of Therapeutic Products, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Marjorie A Shapiro
- Division of Biotechnology Review and Research 1, Office of Biotechnology Products, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, United States Food and Drug Administration, Silver Spring, MD 20993, USA
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8
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Lei Y, Yong Z, Junzhi W. Development and application of potency assays based on genetically modified cells for biological products. J Pharm Biomed Anal 2023; 230:115397. [PMID: 37079933 DOI: 10.1016/j.jpba.2023.115397] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/04/2023] [Accepted: 04/13/2023] [Indexed: 04/22/2023]
Abstract
Potency assays are key to the development, registration, and quality control of biological products. Although previously preferred for clinical relevance, in vivo bioassays have greatly diminished with the advent of dependent cell lines as well as due to ethical concerns. However, for some products, the development of in vitro cell-based assay is challenging, or existing method has limitations such as tedious procedure or low sensitivity. The generation of genetically modified (GM) cell line with improved response to the analyte provides a scientific and promising solution. Potency assays based on GM cell lines are currently used for the quality control of biological products including cytokines, hormones, therapeutic antibodies, vaccines and gene therapy products. In this review, we have discussed the general principles of designing and developing GM cells-based potency assays, including identification of cellular signaling pathways and detectable biological effects, generation of responsive cell lines and constitution of test systems, based on the current research progress. In addition, the applications of some novel technologies and the common concerns regarding GM cells have also been discussed. The research presented in this review provides insights for the development and application of novel GM cells-based potency assays for biological products.
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Affiliation(s)
- Yu Lei
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 2, Tiantan Xili, Dongcheng District, Beijing 100050, China
| | - Zhou Yong
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 2, Tiantan Xili, Dongcheng District, Beijing 100050, China
| | - Wang Junzhi
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 2, Tiantan Xili, Dongcheng District, Beijing 100050, China.
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9
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Chu X, Baek DS, Li W, Shyp T, Mooney B, Hines MG, Morin GB, Sorensen PH, Dimitrov DS. Human antibodies targeting ENPP1 as candidate therapeutics for cancers. Front Immunol 2023; 14:1070492. [PMID: 36761762 PMCID: PMC9905232 DOI: 10.3389/fimmu.2023.1070492] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 01/09/2023] [Indexed: 01/27/2023] Open
Abstract
Ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) is a type II transmembrane glycoprotein expressed in many tissues. High expression levels of ENPP1 have been observed in many cancer types such as lung cancer, ovarian cancer, and breast cancer. Such overexpression has been associated with poor prognosis in these diseases. Hence, ENPP1 is a potential target for immunotherapy across multiple cancers. Here, we isolated and characterized two high-affinity and specific anti-ENPP1 Fab antibody candidates, 17 and 3G12, from large phage-displayed human Fab libraries. After conversion to IgG1, the binding of both antibodies increased significantly due to avidity effects. Based on these antibodies, we generated antibody-drug conjugates (ADCs), IgG-based bispecific T-cell engagers (IbTEs), and CAR T-cells which all exhibited potent killing of ENPP1-expressing cells. Thus, these various antibody-derived modalities are promising therapeutic candidates for cancers expressing human ENPP1.
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Affiliation(s)
- Xiaojie Chu
- Center for Antibody Therapeutics, Division of Infectious Diseases, Department of Medicine, University of Pittsburgh Medical School, Pittsburgh, PA, United States
| | - Du-San Baek
- Center for Antibody Therapeutics, Division of Infectious Diseases, Department of Medicine, University of Pittsburgh Medical School, Pittsburgh, PA, United States
| | - Wei Li
- Center for Antibody Therapeutics, Division of Infectious Diseases, Department of Medicine, University of Pittsburgh Medical School, Pittsburgh, PA, United States
| | - Taras Shyp
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.,Department of Molecular Oncology, BC Cancer Research Institute, Vancouver, BC, Canada
| | - Brian Mooney
- Canada's Michael Smith Genome Sciences Centre, BC Cancer Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Margaret G Hines
- Center for Antibody Therapeutics, Division of Infectious Diseases, Department of Medicine, University of Pittsburgh Medical School, Pittsburgh, PA, United States
| | - Gregg B Morin
- Canada's Michael Smith Genome Sciences Centre, BC Cancer Research Institute, University of British Columbia, Vancouver, BC, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Poul H Sorensen
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.,Department of Molecular Oncology, BC Cancer Research Institute, Vancouver, BC, Canada
| | - Dimiter S Dimitrov
- Center for Antibody Therapeutics, Division of Infectious Diseases, Department of Medicine, University of Pittsburgh Medical School, Pittsburgh, PA, United States.,Abound Bio, Pittsburgh, PA, United States
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10
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Elotuzumab, a potential therapeutic humanized anti-SLAMF7 monoclonal antibody, enhances natural killer cell-mediated killing of primary effusion lymphoma cells. Cancer Immunol Immunother 2022; 71:2497-2509. [DOI: 10.1007/s00262-022-03177-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 02/15/2022] [Indexed: 10/18/2022]
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11
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Shih HP, Ding JY, Sotolongo Bellón J, Lo YF, Chung PH, Ting HT, Peng JJ, Wu TY, Lin CH, Lo CC, Lin YN, Yeh CF, Chen JB, Wu TS, Liu YM, Kuo CY, Wang SY, Tu KH, Ng CY, Lei WT, Tsai YH, Chen JH, Chuang YT, Huang JY, Rey FA, Chen HK, Chang TW, Piehler J, Chi CY, Ku CL. Pathogenic autoantibodies to IFN-γ act through the impedance of receptor assembly and Fc-mediated response. J Exp Med 2022; 219:213354. [PMID: 35833912 PMCID: PMC9287643 DOI: 10.1084/jem.20212126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 03/21/2022] [Accepted: 06/23/2022] [Indexed: 01/16/2023] Open
Abstract
Anti-interferon (IFN)-γ autoantibodies (AIGAs) are a pathogenic factor in late-onset immunodeficiency with disseminated mycobacterial and other opportunistic infections. AIGAs block IFN-γ function, but their effects on IFN-γ signaling are unknown. Using a single-cell capture method, we isolated 19 IFN-γ-reactive monoclonal antibodies (mAbs) from patients with AIGAs. All displayed high-affinity (KD < 10-9 M) binding to IFN-γ, but only eight neutralized IFN-γ-STAT1 signaling and HLA-DR expression. Signal blockade and binding affinity were correlated and attributed to somatic hypermutations. Cross-competition assays identified three nonoverlapping binding sites (I-III) for AIGAs on IFN-γ. We found that site I mAb neutralized IFN-γ by blocking its binding to IFN-γR1. Site II and III mAbs bound the receptor-bound IFN-γ on the cell surface, abolishing IFN-γR1-IFN-γR2 heterodimerization and preventing downstream signaling. Site III mAbs mediated antibody-dependent cellular cytotoxicity, probably through antibody-IFN-γ complexes on cells. Pathogenic AIGAs underlie mycobacterial infections by the dual blockade of IFN-γ signaling and by eliminating IFN-γ-responsive cells.
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Affiliation(s)
- Han-Po Shih
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Jing-Ya Ding
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Junel Sotolongo Bellón
- Division of Biophysics, Department of Biology, University of Osnabruck, Osnabruck, Germany
| | - Yu-Fang Lo
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | | | - He-Ting Ting
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Jhan-Jie Peng
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Tsai-Yi Wu
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Chia-Hao Lin
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Chia-Chi Lo
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - You-Ning Lin
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Chun-Fu Yeh
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan,Division of Infectious Diseases, Department of Internal Medicine, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Jiun-Bo Chen
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Ting-Shu Wu
- Division of Infectious Diseases, Department of Internal Medicine, Chang Gung Memorial Hospital, Linkou, Taiwan,Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Yuag-Meng Liu
- Division of Infectious Diseases, Department of Internal Medicine, Changhua Christian Hospital, Changhua, Taiwan
| | - Chen-Yen Kuo
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan,Division of Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shang-Yu Wang
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan,Division of General Surgery, Department of Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Kun-Hua Tu
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan,Chang Gung University College of Medicine, Taoyuan, Taiwan,Kidney Research Center, Department of Nephrology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chau Yee Ng
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan,Department of Dermatology, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Wei-Te Lei
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan,Department of Pediatrics, Hsinchu MacKay Memorial Hospital, Hsinchu, Taiwan
| | - Yu-Huan Tsai
- Laboratory of Host-Microbe Interactions and Cell Dynamics, Institute of Microbiology and Immunology, College of Life Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Jou-Han Chen
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Ya-Ting Chuang
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
| | | | - Félix A. Rey
- Structural Virology Unit, Department of Virology, Institut Pasteur, Paris, France
| | | | - Tse-Wen Chang
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Jacob Piehler
- Division of Biophysics, Department of Biology, University of Osnabruck, Osnabruck, Germany
| | - Chih-Yu Chi
- Division of Infectious Diseases, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan,School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan,Chih-Yu Chi:
| | - Cheng-Lung Ku
- Laboratory of Human Immunology and Infectious Disease, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan,Department of Nephrology, Chang Gung Memorial Hospital, Taoyuan, Taiwan,Center for Molecular and Clinical Immunology, Chang Gung University, Taoyuan, Taiwan,Correspondence to Cheng-Lung Ku:
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12
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Hong Y, Guo H, Wei M, Zhang Y, Fang M, Cheng T, Li Z, Ge S, Yao X, Yuan Q, Xia N. Cell-based reporter assays for measurements of antibody-mediated cellular cytotoxicity and phagocytosis against SARS-CoV-2 spike protein. J Virol Methods 2022; 307:114564. [PMID: 35671888 PMCID: PMC9167684 DOI: 10.1016/j.jviromet.2022.114564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/17/2022] [Accepted: 06/02/2022] [Indexed: 12/23/2022]
Abstract
The COVID-19 pandemic caused by SARS-CoV-2 infections has led to excess deaths worldwide. Neutralizing antibodies (nAbs) against viral spike protein acquired from natural infections or vaccinations contribute to protection against new- and re-infections. Besides neutralization, antibody-mediated cellular cytotoxicity (ADCC) and phagocytosis (ADCP) are also important for viral clearance. However, due to the lack of convenient methods, the ADCC and ADCP responses elicited by viral infections or vaccinations remain to be explored. Here, we developed cell-based assays using target cells stably expressing SARS-CoV-2 spikes and Jurkat-NFAT-CD16a/CD32a effector cells for ADCC/ADCP measurements of monoclonal antibodies and human convalescent COVID-19 plasmas (HCPs). In control samples (n = 190), the specificity was 99.5% (95%CI: 98.4–100%) and 97.4% (95%CI: 95.1–99.6%) for the ADCC and ADCP assays, respectively. Among 87 COVID-19 HCPs, 83 (sensitivity: 95.4%, 95%CI: 91.0–99.8%) and 81 (sensitivity: 93.1%, 95%CI: 87.8–98.4%) showed detectable ADCC (titer range: 7.4–1721.6) and ADCP activities (titer range: 4–523.2). Notably, both ADCC and ADCP antibody titers positively correlated with the nAb titers in HCPs. In summary, we developed new tools for quantitative ADCC and ADCP analysis against SARS-CoV-2, which may facilitate further evaluations of Fc-mediated effector functions in preventing and treating against SARS-CoV-2.
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Affiliation(s)
- Yuting Hong
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, P. R. China; National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian, P. R. China
| | - Huilin Guo
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, P. R. China
| | - Min Wei
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, P. R. China; National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian, P. R. China
| | - Yali Zhang
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, P. R. China; National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian, P. R. China
| | - Mujin Fang
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, P. R. China; National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian, P. R. China
| | - Tong Cheng
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, P. R. China; National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian, P. R. China
| | - Zhiyong Li
- The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, P.R. China
| | - Shengxiang Ge
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, P. R. China; National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian, P. R. China
| | - Xiangyang Yao
- The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, P.R. China.
| | - Quan Yuan
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, P. R. China; National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian, P. R. China.
| | - Ningshao Xia
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, P. R. China; National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian, P. R. China
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13
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Aoyama M, Tada M, Ishii-Watabe A. FcγRIIIa-158V/F polymorphism affects the performance of FcγRIIIa-related bioassay. Biochem Biophys Res Commun 2022; 608:149-155. [DOI: 10.1016/j.bbrc.2022.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 04/01/2022] [Indexed: 11/26/2022]
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14
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Qin L, Wang L, Zhang J, Zhou H, Yang Z, Wang Y, Cai W, Wen F, Jiang X, Zhang T, Ye H, Long B, Qin J, Shi W, Guan X, Yu Z, Yang J, Wang Q, Jiao Z. Therapeutic strategies targeting uPAR potentiate anti-PD-1 efficacy in diffuse-type gastric cancer. SCIENCE ADVANCES 2022; 8:eabn3774. [PMID: 35613265 PMCID: PMC9132454 DOI: 10.1126/sciadv.abn3774] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The diffuse-type gastric cancer (DGC) is a subtype of gastric cancer (GC) associated with low HER2 positivity rate and insensitivity to chemotherapy and immune checkpoint inhibitors. Here, we identify urokinase-type plasminogen activator receptor (uPAR) as a potential therapeutic target for DGC. We have developed a novel anti-uPAR monoclonal antibody, which targets the domains II and III of uPAR and blocks the binding of urokinase-type plasminogen activator to uPAR. We show that the combination of anti-uPAR and anti-Programmed cell death protein 1 (PD-1) remarkably inhibits tumor growth and prolongs survival via multiple mechanisms, using cell line-derived xenograft and patient-derived xenograft mouse models. Furthermore, uPAR chimeric antigen receptor-expressing T cells based on the novel anti-uPAR effectively kill DGC patient-derived organoids and exhibit impressive survival benefit in the established mouse models, especially when combined with PD-1 blockade therapy. Our study provides a new possibility of DGC treatment by targeting uPAR in a unique manner.
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Affiliation(s)
- Long Qin
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Long Wang
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Junchang Zhang
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Huinian Zhou
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Zhiliang Yang
- Lanzhou Huazhitiancheng Biotechnologies Co., Ltd, Lanzhou, Gansu 730000, China
| | - Yan Wang
- Lanzhou Huazhitiancheng Biotechnologies Co., Ltd, Lanzhou, Gansu 730000, China
| | - Weiwen Cai
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Fei Wen
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Xiangyan Jiang
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Tiansheng Zhang
- Lanzhou Huazhitiancheng Biotechnologies Co., Ltd, Lanzhou, Gansu 730000, China
| | - Huili Ye
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Bo Long
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Junjie Qin
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Wengui Shi
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Xiaoying Guan
- Department of Pathology, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Zeyuan Yu
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Jing Yang
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
- Corresponding author. (Z.J.); (Q.W.); (J.Y.)
| | - Qi Wang
- Lanzhou Huazhitiancheng Biotechnologies Co., Ltd, Lanzhou, Gansu 730000, China
- Corresponding author. (Z.J.); (Q.W.); (J.Y.)
| | - Zuoyi Jiao
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
- Corresponding author. (Z.J.); (Q.W.); (J.Y.)
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15
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Liu T, Xu J, Guo Q, Zhang D, Li J, Qian W, Guo H, Zhou X, Hou S. Identification, Efficacy, and Stability Evaluation of Succinimide Modification With a High Abundance in the Framework Region of Golimumab. Front Chem 2022; 10:826923. [PMID: 35449588 PMCID: PMC9017650 DOI: 10.3389/fchem.2022.826923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 03/08/2022] [Indexed: 11/24/2022] Open
Abstract
Succinimide (Asu) is the intermediate for asparagine deamidation in therapeutic proteins, and it can be readily hydrolyzed to form aspartate and iso-aspartate residues. Moreover, Asu plays an important role in the protein degradation pathways, asparagine deamidation, and aspartic acid isomerization. Here, Asu modification with a high abundance in the framework region (FR) of golimumab was first reported, the effect of denaturing buffer pH on the Asu modification homeostasis was studied, and the results revealed that it was relatively stable over a pH range of 6.0–7.0 whereas a rapid decrease at pH 8.0. Then, the peptide-based multi-attribute method (MAM) analyses showed that the Asu formation was at Asn 43 in the FR of the heavy chain. Meanwhile, the efficacy [affinity, binding and bioactivity, complement-dependent cytotoxicity (CDC) activity, and antibody-dependent cell-mediated cytotoxicity (ADCC) activity] and stability of the Asu modification of golimumab were evaluated, and the current results demonstrated comparable efficacy and stability between the Asu low- and high-abundance groups. Our findings provide valuable insights into Asu modification and its effect on efficacy and stability, and this study also demonstrates that there is a need to develop a broad-spectrum, rapid, and accurate platform to identify and characterize new peaks in the development of therapeutic proteins, particularly for antibody drugs.
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Affiliation(s)
- Tao Liu
- Department of Oncology, Huashan Hospital, Fudan University, Shanghai, China
- State Key Laboratory of Antibody Medicine and Targeted Therapy, Shanghai, China
- NMPA Key Laboratory for Quality Control of Therapeutic Monoclonal Antibodies, Shanghai, China
| | - Jin Xu
- State Key Laboratory of Antibody Medicine and Targeted Therapy, Shanghai, China
- NMPA Key Laboratory for Quality Control of Therapeutic Monoclonal Antibodies, Shanghai, China
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
- Shanghai Zhangjiang Biotechnology Co., Ltd., Shanghai, China
| | - Qingcheng Guo
- Taizhou Mabtech Pharmaceuticals Co., Ltd., Taizhou, China
| | - Dapeng Zhang
- State Key Laboratory of Antibody Medicine and Targeted Therapy, Shanghai, China
- NMPA Key Laboratory for Quality Control of Therapeutic Monoclonal Antibodies, Shanghai, China
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Jun Li
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Weizhu Qian
- State Key Laboratory of Antibody Medicine and Targeted Therapy, Shanghai, China
- NMPA Key Laboratory for Quality Control of Therapeutic Monoclonal Antibodies, Shanghai, China
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Huaizu Guo
- State Key Laboratory of Antibody Medicine and Targeted Therapy, Shanghai, China
- NMPA Key Laboratory for Quality Control of Therapeutic Monoclonal Antibodies, Shanghai, China
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
- Shanghai Zhangjiang Biotechnology Co., Ltd., Shanghai, China
- *Correspondence: Huaizu Guo, ; Xinli Zhou, ; Sheng Hou,
| | - Xinli Zhou
- Department of Oncology, Huashan Hospital, Fudan University, Shanghai, China
- *Correspondence: Huaizu Guo, ; Xinli Zhou, ; Sheng Hou,
| | - Sheng Hou
- State Key Laboratory of Antibody Medicine and Targeted Therapy, Shanghai, China
- NMPA Key Laboratory for Quality Control of Therapeutic Monoclonal Antibodies, Shanghai, China
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
- *Correspondence: Huaizu Guo, ; Xinli Zhou, ; Sheng Hou,
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16
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Tsao LC, Crosby EJ, Trotter TN, Wei J, Wang T, Yang X, Summers AN, Lei G, Rabiola CA, Chodosh LA, Muller WJ, Lyerly HK, Hartman ZC. Trastuzumab/Pertuzumab combination therapy stimulates anti-tumor responses through complement-dependent cytotoxicity and phagocytosis. JCI Insight 2022; 7:155636. [PMID: 35167491 PMCID: PMC8986081 DOI: 10.1172/jci.insight.155636] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 02/09/2022] [Indexed: 11/17/2022] Open
Abstract
Standard-of-care treatment for advanced HER2+ breast cancers (BC) is comprised of two HER2-specific monoclonal antibodies (mAb), Trastuzumab (T) and Pertuzumab (P) with chemotherapy. While this combination (T+P) is highly effective, its synergistic mechanism of action (MOA) is not completely known. Initial studies had demonstrated that Pertuzumab suppressed HER2 hetero-dimerization as the potential therapeutic MOA, thus the improved outcome associated with the T+P combination MOA compared to Trastuzumab alone has been widely reported as being due to Pertuzumab-mediated suppression of HER2 signaling in combination with Trastuzumab-mediated induction of anti-tumor immunity. Unraveling this MOA may be critical to extend this combination strategy to other antigens or other cancers, as well as improving this current treatment modality. Using novel murine and human versions of Pertuzumab, we found it induced both Antibody-Dependent-Cellular-Phagocytosis (ADCP) by tumor-associated macrophages and suppression of HER2 oncogenic signaling. Most significantly, we identified that only T+P combination therapy, but not when either antibody used in isolation, allows for the activation of the classical complement pathway, resulting in both direct complement-dependent cytotoxicity (CDC) as well as complement-dependent cellular phagocytosis (CDCP) of HER2+ BC cells. Notably, we show that tumor expression of C1q was positively associated with survival outcome in HER2+ BC patients, whereas expression of complement regulators CD55 and CD59 were inversely correlated, suggesting the importance of complement activity in clinical outcomes. Accordingly, inhibition of C1 activity in mice abolished the synergistic therapeutic activity of T+P therapy, whereas knockdown of CD55 and CD59 expression enhanced T+P efficacy. In summary, our study identifies classical complement activation as a significant anti-tumor MOA for T+P therapy that may be functionally enhanced to augment therapeutic efficacy in the clinic.
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Affiliation(s)
- Li-Chung Tsao
- Department of Surgery, Duke University, Durham, United States of America
| | - Erika J Crosby
- Department of Surgery, Duke University, Durham, United States of America
| | - Timothy N Trotter
- Department of Surgery, Duke University, Durham, United States of America
| | - Junping Wei
- Department of Surgery, Duke University, Durham, United States of America
| | - Tao Wang
- Department of Surgery, Duke University, Durham, United States of America
| | - Xiao Yang
- Department of Surgery, Duke University, Durham, United States of America
| | - Amanda N Summers
- Department of Surgery, Duke University, Durham, United States of America
| | - Gangjun Lei
- Department of Surgery, Duke University, Durham, United States of America
| | | | - Lewis A Chodosh
- Department of Cancer Biology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, United States of America
| | | | - Herbert Kim Lyerly
- Department of Surgery, Duke University, Durham, United States of America
| | - Zachary C Hartman
- Department of Surgery, Duke University, Durham, United States of America
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17
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Gamain B, Brousse C, Rainey NE, Diallo BK, Paquereau CE, Desrames A, Ceputyte J, Semblat JP, Bertrand O, Gangnard S, Teillaud JL, Chêne A. BMFPs, a versatile therapeutic tool for redirecting a preexisting Epstein-Barr virus antibody response toward defined target cells. SCIENCE ADVANCES 2022; 8:eabl4363. [PMID: 35148183 PMCID: PMC8836820 DOI: 10.1126/sciadv.abl4363] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
Industrial production of therapeutic monoclonal antibodies is mostly performed in eukaryotic-based systems, allowing posttranslational modifications mandatory for their functional activity. The resulting elevated product cost limits therapy access to some patients. To address this limitation, we conceptualized a novel immunotherapeutic approach to redirect a preexisting polyclonal antibody response against Epstein-Barr virus (EBV) toward defined target cells. We engineered and expressed in bacteria bimodular fusion proteins (BMFPs) comprising an Fc-deficient binding moiety targeting an antigen expressed at the surface of a target cell, fused to the EBV-P18 antigen, which recruits circulating endogenous anti-P18 IgG in EBV+ individuals. Opsonization of BMFP-coated targets efficiently triggered antibody-mediated clearing effector mechanisms. When assessed in a P18-primed mouse tumor model, therapy performed with an anti-huCD20 BMFP significantly led to increased survival and total cancer remission in some animals. These results indicate that BMFPs could represent potent and useful therapeutic molecules to treat a number of diseases.
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Affiliation(s)
- Benoît Gamain
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
| | - Carine Brousse
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
| | - Nathan E. Rainey
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
| | - Béré K. Diallo
- Laboratory “Immune Microenvironment and Immunotherapy”, INSERM U.1135, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Faculté de Médecine, Sorbonne Université, 91 boulevard de l’Hôpital, 75013 Paris, France
| | - Clara-Eva Paquereau
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
| | - Alexandra Desrames
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
| | - Jolita Ceputyte
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
| | - Jean-Philippe Semblat
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
| | - Olivier Bertrand
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
| | - Stéphane Gangnard
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
| | - Jean-Luc Teillaud
- Laboratory “Immune Microenvironment and Immunotherapy”, INSERM U.1135, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Faculté de Médecine, Sorbonne Université, 91 boulevard de l’Hôpital, 75013 Paris, France
| | - Arnaud Chêne
- Université de Paris, Biologie Intégrée du Globule Rouge, UMR_S1134, INSERM, F-75015 Paris, France
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18
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Garvin D, Stecha P, Gilden J, Wang J, Grailer J, Hartnett J, Fan F, Cong M, Cheng ZJ. Determining ADCC Activity of Antibody-Based Therapeutic Molecules using Two Bioluminescent Reporter-Based Bioassays. Curr Protoc 2021; 1:e296. [PMID: 34787960 DOI: 10.1002/cpz1.296] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Antibody Fc effector function is one of the main mechanisms of action (MoA) for therapeutic monoclonal antibodies. Measurement of antibody-dependent cellular cytotoxicity (ADCC) is critical for understanding the Fc effector function during monoclonal antibody development. This article covers two cell-based ADCC bioassays which can quantitatively measure the antibody potency in ADCC. Basic Protocol 1 describes the ADCC reporter bioassay using engineered ADCC effector cells which measures the FcγRIIIa-mediated luciferase reporter activation upon the binding of antibody-coated target cells. Basic Protocol 2 describes the PBMC ADCC bioassay using primary peripheral blood mononuclear cells (PBMC) as effector cells and engineered HiBiT target cells in an assay that measures the release of HiBiT from target cells upon antibody-mediated target lysis. Optimization of several key assay parameters including cell handling, effector:target (E:T) ratios, assay plate, and plate reader requirement, and how these parameters impact assay performance are discussed. © 2021 Promega Corporation. Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: ADCC reporter bioassay using engineered ADCC bioassay effector cells Basic Protocol 2: PBMC ADCC bioassay using primary PBMC and engineered HiBiT target cells.
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Affiliation(s)
| | | | | | - Jun Wang
- Promega Corporation, Madison, Wisconsin
| | | | | | - Frank Fan
- Promega Corporation, Madison, Wisconsin
| | - Mei Cong
- Promega Corporation, Madison, Wisconsin
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19
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Xiong H, Luo F, Zhou P, Yi J. Development of a reporter gene method to measure the bioactivity of anti-CD38 × CD3 bispecific antibody. Antib Ther 2021; 4:212-221. [PMID: 34676357 PMCID: PMC8524643 DOI: 10.1093/abt/tbab022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/24/2021] [Accepted: 09/24/2021] [Indexed: 01/04/2023] Open
Abstract
Background A T cell-redirecting bispecific antibody (bsAb) consisting of a tumor-binding unit and a T cell-binding unit is a large group of antibody-based biologics against death-causing cancer diseases. The anti-CD38 × anti-CD3 bsAb (Y150) is potential for treating multiple myeloma (MM). When developing a cell-based reporter gene bioassay to assess the activities of Y150, it was found that the expression of CD38 on the human T lymphocyte cells (Jurkat) caused the nonspecific activation, which interfered with the specific T cells activation of mediated by the Y150 and CD38(+) tumor cells. Methods Here, we first knocked-out the CD38 expression on Jurkat T cell line by CRISPR-Cas9 technology, then developed a stable monoclonal CD38(−) Jurkat T cell line with an NFAT-RE driving luciferase expressing system. Further based on the CD38(−) Jurkat cell, we developed a reporter gene method to assess the bioactivity of the anti-CD38 × anti-CD3 bsAb. Results Knocking out CD38 expression abolished the nonspecific self-activation of the Jurkat cells. The selected stable monoclonal CD38(−) Jurkat T cell line assured the robustness of the report genes assay for the anti-CD38 × anti-CD3 bsAb. The relative potencies of the Y150 measured by the developed reporter gene assay were correlated with those by the flow-cytometry-based cell cytotoxicity assay and by the ELISA-based binding assay. Conclusions The developed reporter gene assay was mechanism of action-reflective for the bioactivity of anti-CD38 × anti-CD3 antibody, and suitable for the quality control for the bsAb product.
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Affiliation(s)
- Hui Xiong
- Wuhan YZY Biopharma Co., Ltd, Biolake City C2-1, No. 666 Gaoxin Road, Wuhan, Hubei 430075, China
| | - Fengyan Luo
- Wuhan YZY Biopharma Co., Ltd, Biolake City C2-1, No. 666 Gaoxin Road, Wuhan, Hubei 430075, China
| | - Pengfei Zhou
- Wuhan YZY Biopharma Co., Ltd, Biolake City C2-1, No. 666 Gaoxin Road, Wuhan, Hubei 430075, China
| | - Jizu Yi
- Wuhan YZY Biopharma Co., Ltd, Biolake City C2-1, No. 666 Gaoxin Road, Wuhan, Hubei 430075, China
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20
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Panaampon J, Kariya R, Okada S. Efficacy and mechanism of the anti-CD38 monoclonal antibody Daratumumab against primary effusion lymphoma. Cancer Immunol Immunother 2021; 71:1017-1031. [PMID: 34545416 DOI: 10.1007/s00262-021-03054-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 09/06/2021] [Indexed: 02/08/2023]
Abstract
Primary effusion lymphoma (PEL) is a rare, aggressive B cell non-Hodgkin's lymphoma of the body cavities with malignant effusions. The prognosis is poor, and no optimal treatment has been established. CD38 is a type II transmembrane glycoprotein known to overexpress in multiple myeloma (MM). Daratumumab (DARA), a human CD38-targeting monoclonal antibody (mAb), is approved for MM treatment. In this study, we found expression of CD38 on PEL cells and assessed the anti-PEL activity of DARA. We found that both KHYG-1 and N6 (CD16-transfected KHYG-1) NK cell lines showed direct killing activity against PEL cells with induction of CD107a, and NK-mediated cytotoxicity by N6NK (CD16+) cells increased with DARA treatment. We confirmed direct NK activity and antibody-dependent cell cytotoxicity (ADCC) by expanded NK cells, indicating that DARA has high ADCC activity. We elucidated the antibody-dependent cell phagocytosis (ADCP) by using human monocyte-derived macrophages (MDMs) and mouse peritoneal macrophages. DARA also showed potent complement-dependent cytolysis (CDC) toward PEL. DARA also induced PEL cell death in the presence of a cross-linking antibody. Moreover, treatment with DARA inhibited tumor growth in a PEL xenograft mouse model. These results provide preclinical evidence that Ab targeting of CD38 could be an effective therapeutic strategy for the treatment of PEL.
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Affiliation(s)
- Jutatip Panaampon
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan
| | - Ryusho Kariya
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan.
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21
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The Role of Fc Receptors on the Effectiveness of Therapeutic Monoclonal Antibodies. Int J Mol Sci 2021; 22:ijms22168947. [PMID: 34445651 PMCID: PMC8396266 DOI: 10.3390/ijms22168947] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/14/2021] [Accepted: 08/16/2021] [Indexed: 12/12/2022] Open
Abstract
Since the approval of the first monoclonal antibody (mAb) in 1986, a huge effort has been made to guarantee safety and efficacy of therapeutic mAbs. As of July 2021, 118 mAbs are approved for the European market for a broad range of clinical indications. In order to ensure clinical efficacy and safety aspects, (pre-)clinical experimental approaches evaluate the respective modes of action (MoA). In addition to antigen-specificity including binding affinity and -avidity, MoA comprise Fc-mediated effector functions such as antibody dependent cellular cytotoxicity (ADCC) and the closely related antibody dependent cellular phagocytosis (ADCP). For this reason, a variety of cell-based assays have been established investigating effector functions of therapeutic mAbs with different effector/target-cell combinations and several readouts including Fcγ receptor (FcγR)-mediated lysis, fluorescence, or luminescence. Optimized FcγR-mediated effector functions regarding clinical safety and efficacy are addressed with modification strategies such as point mutations, altered glycosylation patterns, combination of different Fc subclasses (cross isotypes), and Fc-truncation of the mAb. These strategies opened the field for a next generation of therapeutic mAbs. In conclusion, it is of major importance to consider FcγR-mediated effector functions for the efficacy of therapeutic mAbs.
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22
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Kaneko MK, Ohishi T, Nakamura T, Inoue H, Takei J, Sano M, Asano T, Sayama Y, Hosono H, Suzuki H, Kawada M, Kato Y. Development of Core-Fucose-Deficient Humanized and Chimeric Anti-Human Podoplanin Antibodies. Monoclon Antib Immunodiagn Immunother 2021; 39:167-174. [PMID: 33085938 DOI: 10.1089/mab.2020.0019] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Podoplanin (PDPN), a 36-kDa type I transmembrane O-glycoprotein, is expressed in normal cells, including renal epithelial cells (podocytes), lymphatic endothelial cells, and pulmonary type I alveolar cells, and in cancer cells, including brain tumors and squamous cell lung carcinomas. PDPN activates platelet aggregation by binding to C-type lectin-like receptor-2 (CLEC-2) on platelets, and PDPN/CLEC-2 interaction facilitates blood/lymphatic vessel separation. We previously produced an anti-human PDPN monoclonal antibody (mAb), clone NZ-1 (rat IgG2a, lambda) and its rat-human chimeric mAbs (NZ-8/NZ-12), which neutralize PDPN/CLEC-2 interactions and inhibit platelet aggregation and cancer metastasis. In this study, we first developed a humanized anti-human PDPN mAb, named as NZ-27. We further produced a core-fucose-deficient version of NZ-27, named as P1027 and a core-fucose-deficient version of NZ-12, named as NZ-12f. We investigated the binding affinity, antibody-dependent cellular cytotoxicity (ADCC), complement-dependent cytotoxicity (CDC), and antitumor activity of P1027 and NZ-12f. We demonstrated that the binding affinities of P1027 and NZ-12f against LN319 (a human glioblastoma cell line) are 1.1 × 10-8 and 3.9 × 10-9 M, respectively. ADCC reporter assays demonstrated that NZ-12f shows 1.5 times higher luminescence than P1027. Furthermore, NZ-12f showed 2.2 times higher ADCC than P1027, whereas both P1027 and NZ-12f showed high CDC activities against LN319 cells. Using LN319 xenograft models, P1027 and NZ-12f significantly reduced tumor development in an LN319 xenograft model compared with control human IgG. Treatment with P1027 and NZ-12f may be a useful therapy for patients with PDPN-expressing cancers.
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Affiliation(s)
- Mika K Kaneko
- Department of Antibody Drug Development, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomokazu Ohishi
- Institute of Microbial Chemistry (BIKAKEN), Numazu, Microbial Chemistry Research Foundation, Numazu-shi, Japan
| | - Takuro Nakamura
- Department of Antibody Drug Development, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroyuki Inoue
- Institute of Microbial Chemistry (BIKAKEN), Numazu, Microbial Chemistry Research Foundation, Numazu-shi, Japan
| | - Junko Takei
- Department of Antibody Drug Development, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masato Sano
- Department of Antibody Drug Development, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Teizo Asano
- Department of Antibody Drug Development, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yusuke Sayama
- Department of Antibody Drug Development, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hideki Hosono
- Department of Antibody Drug Development, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroyoshi Suzuki
- Department of Pathology and Laboratory Medicine, Sendai Medical Center, Sendai, Japan
| | - Manabu Kawada
- Institute of Microbial Chemistry (BIKAKEN), Numazu, Microbial Chemistry Research Foundation, Numazu-shi, Japan
| | - Yukinari Kato
- Department of Antibody Drug Development, Tohoku University Graduate School of Medicine, Sendai, Japan.,New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan
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23
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Takashima S, Kurogochi M, Tsukimura W, Mori M, Osumi K, Sugawara SI, Amano J, Mizuno M, Takada Y, Matsuda A. Preparation and biological activities of anti-HER2 monoclonal antibodies with multi-branched complex-type N-glycans. Glycobiology 2021; 31:1401-1414. [PMID: 34192331 DOI: 10.1093/glycob/cwab064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 06/21/2021] [Accepted: 06/22/2021] [Indexed: 11/13/2022] Open
Abstract
Immunoglobulin G (IgG) has a conserved N-glycosylation site at Asn297 in the fragment crystallizable (Fc) region. Previous studies have shown that N-glycosylation of this site is a critical mediator of the antibody's effector functions, such as antibody-dependent cellular cytotoxicity. While the N-glycan structures attached to the IgG-Fc region are generally heterogenous, IgGs engineered to be homogenously glycosylated with functional N-glycans may improve the efficacy of antibodies. The major glycoforms of the N-glycans on the IgG-Fc region are bi-antennary complex-type N-glycans, while multi-branched complex-type N-glycans are not typically found. However, IgGs with tri-antennary complex-type N-glycans have been generated using the N-glycan remodeling technique, suggesting that more branched N-glycans might be artificially attached. At present, little is known about the properties of these IgGs. In this study, IgGs with multi-branched N-glycans on the Fc region were prepared by using a combination of the glycosynthase/oxazoline substrate-based N-glycan remodeling technique and successive reactions with glycosyltransferases. Among the IgGs produced by these methods, the largest N-glycan attached was a bisecting N-acetylglucosamine (GlcNAc) containing a sialylated penta-antennary structure. Concerning the Fc-mediated effector functions, the majority of IgGs with tri- and tetra-antennary N-glycans on their Fc region showed properties similar to IgGs with ordinary bi-antennary N-glycans.
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Affiliation(s)
- Shou Takashima
- Laboratory of Glycobiology, The Noguchi Institute, Tokyo 173-0003, Japan
| | - Masaki Kurogochi
- Laboratory of Glyco-Organic Chemistry, The Noguchi Institute, Tokyo 173-0003, Japan
| | - Wataru Tsukimura
- Laboratory of Glycobiology, The Noguchi Institute, Tokyo 173-0003, Japan
| | - Masako Mori
- Laboratory of Glycobiology, The Noguchi Institute, Tokyo 173-0003, Japan
| | - Kenji Osumi
- Laboratory of Glyco-Organic Chemistry, The Noguchi Institute, Tokyo 173-0003, Japan
| | - Shu-Ichi Sugawara
- Laboratory of Glyco-Organic Chemistry, The Noguchi Institute, Tokyo 173-0003, Japan
| | - Junko Amano
- Laboratory of Glycobiology, The Noguchi Institute, Tokyo 173-0003, Japan
| | - Mamoru Mizuno
- Laboratory of Glyco-Organic Chemistry, The Noguchi Institute, Tokyo 173-0003, Japan
| | - Yoshio Takada
- Laboratory of Glycobiology, The Noguchi Institute, Tokyo 173-0003, Japan
| | - Akio Matsuda
- Laboratory of Glycobiology, The Noguchi Institute, Tokyo 173-0003, Japan.,Laboratory of Glyco-Organic Chemistry, The Noguchi Institute, Tokyo 173-0003, Japan
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24
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Uccellini MB, Aslam S, Liu STH, Alam F, García-Sastre A. Development of a Macrophage-Based ADCC Assay. Vaccines (Basel) 2021; 9:vaccines9060660. [PMID: 34204268 PMCID: PMC8234572 DOI: 10.3390/vaccines9060660] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 06/12/2021] [Accepted: 06/14/2021] [Indexed: 11/16/2022] Open
Abstract
Fc-dependent effector functions are an important determinant of the in vivo potency of therapeutic antibodies. Effector function is determined by the combination of FcRs bound by the antibody and the cell expressing the relevant FcRs, leading to antibody-dependent cellular cytotoxicity (ADCC). A number of ADCC assays have been developed; however, they suffer from limitations in terms of throughput, reproducibility, and in vivo relevance. Existing assays measure NK cell-mediated ADCC activity; however, studies suggest that macrophages mediate the effector function of many antibodies in vivo. Here, we report the development of a macrophage-based ADCC assay that relies on luciferase expression in target cells as a measure of live cell number. In the presence of primary mouse macrophages and specific antibodies, loss of luciferase signal serves as a surrogate for ADCC-dependent killing. We show that the assay functions for a variety of mouse and human isotypes with a model antigen/antibody complex in agreement with the known effector function of the isotypes. We also use this assay to measure the activity of a number of influenza-specific antibodies and show that the assay correlates well with the known in vivo effector functions of these antibodies.
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Affiliation(s)
- Melissa B. Uccellini
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (M.B.U.); (S.A.); (S.T.H.L.); (F.A.)
- Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Sadaf Aslam
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (M.B.U.); (S.A.); (S.T.H.L.); (F.A.)
- Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Sean T. H. Liu
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (M.B.U.); (S.A.); (S.T.H.L.); (F.A.)
| | - Fahmida Alam
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (M.B.U.); (S.A.); (S.T.H.L.); (F.A.)
- Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Adolfo García-Sastre
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (M.B.U.); (S.A.); (S.T.H.L.); (F.A.)
- Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- The Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Correspondence: ; Tel.: +1-(212)-241-7769
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25
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Balola AHA, Mayer B, Bartolmäs T, Salama A. A fluorometric erythrophagocytosis assay using differentiated monocytic THP-1 cells to assess the clinical significance of antibodies to red blood cells. Vox Sang 2021; 116:1106-1116. [PMID: 33942922 DOI: 10.1111/vox.13105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 03/02/2021] [Accepted: 03/09/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND OBJECTIVES The significance of antibodies to red blood cells (RBCs) is variable and cannot be predicted solely by serological testing. A flow cytometry-based erythrophagocytosis assay was established using phorbol 12-myristate 13-acetate (PMA)-treated THP-1 cells and RBCs labelled with PKH26 to assess allo- and autoantibodies to RBCs. MATERIALS AND METHODS THP-1 cells were differentiated into macrophage-like cells by treatment with PMA. RBC samples coated with alloantibodies or autoantibodies were obtained from 16 patients with autoimmune haemolytic anaemia of warm type (wAIHA) as well as from five pregnant women with warm autoantibodies. RBCs from healthy blood donors were used as controls. RBCs were labelled with the red lipophilic fluorescent dye PKH26 and incubated with PMA-treated THP-1 cells. After removal of nonadherent RBCs by washing and haemolysis of adherent RBCs, erythrophagocytosis was quantified by flow cytometry. RESULTS We observed significant phagocytosis of RBCs coated with clinically relevant alloantibodies (i.e. anti-D and anti-K) or autoantibodies from patients with active wAIHA, but not of those coated with alloantibodies (anti-Ch) or autoantibodies from patients and pregnant women without haemolysis. CONCLUSION The flow cytometry-based erythrophagocytosis test described here is quantitative, highly reliable, and may be helpful for the assessment of the clinical significance of antibodies to RBCs.
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Affiliation(s)
- Abdelwahab Hassan Ahmed Balola
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Beate Mayer
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Thilo Bartolmäs
- Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Abdulgabar Salama
- Department of Gynecology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
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26
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Yu X, Yu C, Wang K, Liu C, Wang L, Wang J. A robust reporter assay for the determination of the bioactivity of IL-4R-targeted therapeutic antibodies. J Pharm Biomed Anal 2021; 199:114033. [PMID: 33774455 DOI: 10.1016/j.jpba.2021.114033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 03/01/2021] [Accepted: 03/18/2021] [Indexed: 10/21/2022]
Abstract
Type 2 inflammatory cytokines, including IL-4, IL-5 and IL-13, contribute considerably to the pathogenesis of asthma. Anti-IL-4R monoclonal antibody (mAb) has been approved for the therapeutic treatment of asthma, and many mAbs with the same target are in the different stages of R&D and clinical trials. Bioactivity determination is required to ensure the quality control of mAbs. However, current ELISA and SPR assays or cell-based anti-proliferation assays for IL-4R mAbs are either not mechanism-of-action (MOA) representative or tedious and time consuming. Therefore, we developed a reporter gene assay (RGA) based on the HEK-293 cell line that stably expressed signal transducer and activator of transcription 6 (STAT6) and the luciferase reporter controlled by STAT6 binding elements. Anti-4R mAb could bind to IL-4R, and block the interaction between IL-4 and IL-4R, resulting in the reduction of IL-4 induced STAT6 controlled luciferase expression. After careful optimization of the experiment parameters, the RGA method demonstrated optimal dose-response curve between anti-IL-4R mAb concentration and luciferase expression level. Validation according ICH-Q2 proved the excellent assay performance characteristics of the established RGA, including specificity, accuracy, precision, linearity and range. The established transgenic cell line was stable for the bioactivity determination of anti-IL-4R mAb up to 46 generations, and the RGA was also suitable for the bioactivity determination of anti-IL-4 mAbs, and potentially of anti-IL-13 mAbs. The established RGA could be adopted to determine the bioactivity during the development, characterization, lot release, stability, and comparability studies of anti-IL-4R mAbs.
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Affiliation(s)
- Xiaojuan Yu
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huatuo Road, Daxing District, Beijing, 102629, China
| | - Chuanfei Yu
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huatuo Road, Daxing District, Beijing, 102629, China
| | - Kaiqin Wang
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huatuo Road, Daxing District, Beijing, 102629, China
| | - Chunyu Liu
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huatuo Road, Daxing District, Beijing, 102629, China
| | - Lan Wang
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huatuo Road, Daxing District, Beijing, 102629, China.
| | - Junzhi Wang
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huatuo Road, Daxing District, Beijing, 102629, China
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27
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The development and kinetics of functional antibody-dependent cell-mediated cytotoxicity (ADCC) to SARS-CoV-2 spike protein. Virology 2021; 559:1-9. [PMID: 33774551 PMCID: PMC7975276 DOI: 10.1016/j.virol.2021.03.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 02/12/2021] [Accepted: 03/14/2021] [Indexed: 12/19/2022]
Abstract
Since the COVID-19 pandemic, functional non-neutralizing antibody responses to SARS-CoV-2, including antibody-dependent cell-mediated cytotoxicity (ADCC), are poorly understood. We developed an ADCC assay utilizing a stably transfected, dual-reporter target cell line with inducible expression of a SARS-CoV-2 spike protein on the cell surface. Using this assay, we analyzed 61 convalescent serum samples from adults with PCR-confirmed COVID-19 and 15 samples from healthy uninfected controls. We found that 56 of 61 convalescent serum samples induced ADCC killing of SARS-CoV-2 S target cells, whereas none of the 15 healthy controls had detectable ADCC. We then found a modest decline in ADCC titer over a median 3-month follow-up in 21 patients who had serial samples available for analysis. We confirmed that the antibody-dependent target cell lysis was mediated primarily via the NK FcγRIIIa receptor (CD16). This ADCC assay had high sensitivity and specificity for detecting serologic immune responses to SARS-CoV-2.
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28
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Du K, Li Y, Liu J, Chen W, Wei Z, Luo Y, Liu H, Qi Y, Wang F, Sui J. A bispecific antibody targeting GPC3 and CD47 induced enhanced antitumor efficacy against dual antigen-expressing HCC. Mol Ther 2021; 29:1572-1584. [PMID: 33429083 DOI: 10.1016/j.ymthe.2021.01.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 11/23/2020] [Accepted: 01/02/2021] [Indexed: 02/08/2023] Open
Abstract
Glypican-3 (GPC3) is a well-characterized hepatocellular carcinoma (HCC)-associated antigen, yet anti-GPC3 therapies have achieved only minimal clinical progress. CD47 is a ubiquitously expressed innate immune checkpoint that promotes evasion of tumors from immune surveillance. Given both the specific expression of GPC3 in HCC and the known phagocytosis inhibitory effect of CD47 in liver cancer, we hypothesized that a bispecific antibody (BsAb) that co-engages with GPC3 and CD47 may offer excellent antitumor efficacy with minimal toxicity. Here, we generated a novel BsAb: GPC3/CD47 biAb. With the use of both in vitro and in vivo assays, we found that GPC3/CD47 biAb exerts strong antitumor activity preferentially against dual antigen-expressing tumor cells. In hCD47/human signal regulatory protein alpha (hCD47/hSIRPα) humanized mice, GPC3/CD47 biAb had an extended serum half-life without causing systemic toxicity. Importantly, GPC3/CD47 biAb induced enhanced Fc-mediated effector functions to dual antigen-expressing HCC cells in vitro, and both macrophages and neutrophils are required for its strong efficacy against xenograft HCC tumors. Notably, GPC3/CD47 biAb outperformed monotherapies and a combination therapy with anti-CD47 and anti-GPC3 monoclonal antibodies (mAbs) in a xenograft HCC model. Our study illustrates a strategy for improving HCC treatment by boosting innate immune responses and presents new insights to inform antibody design for the future development of innovative immune therapies.
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Affiliation(s)
- Kaixin Du
- School of Life Sciences, Beijing Normal University, Beijing 100875, China; National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China
| | - Yulu Li
- National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China; PTN Joint Graduate Program, School of Life Sciences, Peking University, Beijing 100871, China
| | - Juan Liu
- National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China
| | - Wei Chen
- National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China
| | - Zhizhong Wei
- National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China; PTN Joint Graduate Program, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Yong Luo
- National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China
| | - Huisi Liu
- National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China
| | - Yonghe Qi
- National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China
| | - Fengchao Wang
- National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China; Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing 102206, China
| | - Jianhua Sui
- National Institute of Biological Sciences, 7 Science Park Road, Beijing 102206, China; Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing 102206, China.
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29
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Lallemand C, Ferrando-Miguel R, Auer M, Iglseder S, Czech T, Gaber-Wagener A, Di Pauli F, Deisenhammer F, Tovey MG. Quantification of Bevacizumab Activity Following Treatment of Patients With Ovarian Cancer or Glioblastoma. Front Immunol 2020; 11:515556. [PMID: 33178180 PMCID: PMC7593583 DOI: 10.3389/fimmu.2020.515556] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 08/24/2020] [Indexed: 12/22/2022] Open
Abstract
Highly sensitive reporter-gene assays have been developed that allow both the direct vascular endothelial growth factor (VEGF) neutralizing activity of bevacizumab and the ability of bevacizumab to activate antibody dependent cellular cytotoxicity (ADCC) to be quantified rapidly and in a highly specific manner. The use of these assays has shown that in 46 patients with ovarian cancer following four cycle of bevacizumab treatment, and in longitudinal samples from the two patients that respond to bevacizumab therapy from a small cohort of patients with glioblastoma, that there is a reasonably good correlation between bevacizumab drug levels determined by ELISA and bevacizumab activity, determined using either the VEGF-responsive reporter gene, or the ADCC assays. One of the two primary non-responders with glioblastoma exhibited high levels of ADCC activity suggesting reduced bevacizumab Fc engagement in vivo in contrast to the other primary non-responder, and the two secondary non-responders with a decreasing bevacizumab PK profile, determined by ELISA that exhibited low to undetectable ADCC activity. Drug levels were consistently higher than bevacizumab activity determined using the reporter gene assay in serial samples from one of the secondary non-responders and lower in some samples from the other secondary non-responder and ADCC activity was markedly lower in all samples from these patients suggesting that bevacizumab activity may be partially neutralized by anti-drug neutralizing antibodies (NAbs). These results suggest that ADCC activity may be correlated with the ability of some patients to respond to treatment with bevacizumab while the use of the VEGF-responsive reporter-gene assay may allow the appearance of anti-bevacizumab NAbs to be used as a surrogate maker of treatment failure prior to the clinical signs of disease progression.
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Affiliation(s)
| | | | - Michael Auer
- Department of Neurology, Innsbruck Medical University, Innsbruck, Austria
| | - Sarah Iglseder
- Department of Neurology, Innsbruck Medical University, Innsbruck, Austria
| | - Theresa Czech
- Department of Gynecology, Innsbruck Medical University, Innsbruck, Austria
| | | | - Franziska Di Pauli
- Department of Neurology, Innsbruck Medical University, Innsbruck, Austria
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30
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Cao J, Wang L, Yu C, Wang K, Wang W, Yan J, Li Y, Yang Y, Wang X, Wang J. Development of an antibody-dependent cellular cytotoxicity reporter assay for measuring anti-Middle East Respiratory Syndrome antibody bioactivity. Sci Rep 2020; 10:16615. [PMID: 33024203 PMCID: PMC7538987 DOI: 10.1038/s41598-020-73960-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 09/22/2020] [Indexed: 12/17/2022] Open
Abstract
Middle East Respiratory Syndrome coronavirus (MERS-CoV) is a highly virulent pathogen that causes Middle East Respiratory Syndrome (MERS). Anti-MERS-CoV antibodies play an integral role in the prevention and treatment against MERS-CoV infections. Bioactivity is a key quality attribute of therapeutic antibodies, and high accuracy and precision are required. The major methods for evaluating the antiviral effect of antiviral antibodies include neutralization assays using live viruses or pseudoviruses are highly variable. Recent studies have demonstrated that the antibody-dependent cellular cytotoxicity (ADCC) activity of antiviral antibodies is more consistent with the virus clearance effect in vivo than neutralization activity. However, no reports evaluating the ADCC activity of anti-MERS antibodies have been published to date. Here, we describe the development of a robust and reliable cell-based reporter gene assay for the determination of ADCC activity of anti-MERS antibodies using 293T/MERS cells stably expressing the spike protein of MERS-CoV (MERS-S) as target cells and the engineered Jurkat/NFAT-luc/FcγRIIIa stably expressing FcγRIIIA and NFAT reporter gene as effector cells. According to the ICH-Q2 analytical method guidelines, we carefully optimized the experimental conditions and assessed the performance of our assay. In addition, we found that the ADCC activity of afucosylated anti-MERS antibodies is higher than their fucosylated counterparts. The establishment of this ADCC determination system provides a novel method for evaluating the bioactivity of anti-MERS antibodies and improving ADCC activity through modification of N-glycosylation of the Fc segment.
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Affiliation(s)
- Junxia Cao
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huotuo Road, Biomedical Base, Daxing District, Beijing, 102629, China.,Department of Physiology and Pathopysiology, Capital Medical University, Youanmen, Fengtai District, Beijing, 100069, China
| | - Lan Wang
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huotuo Road, Biomedical Base, Daxing District, Beijing, 102629, China
| | - Chuanfei Yu
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huotuo Road, Biomedical Base, Daxing District, Beijing, 102629, China
| | - Kaiqin Wang
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huotuo Road, Biomedical Base, Daxing District, Beijing, 102629, China
| | - Wenbo Wang
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huotuo Road, Biomedical Base, Daxing District, Beijing, 102629, China
| | - Jinghua Yan
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yan Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yalan Yang
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huotuo Road, Biomedical Base, Daxing District, Beijing, 102629, China
| | - Xiaomin Wang
- Department of Physiology and Pathopysiology, Capital Medical University, Youanmen, Fengtai District, Beijing, 100069, China.
| | - Junzhi Wang
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, No. 31, Huotuo Road, Biomedical Base, Daxing District, Beijing, 102629, China.
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31
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Malenge MM, Patzke S, Ree AH, Stokke T, Ceuppens P, Middleton B, Dahle J, Repetto-Llamazares AHV. 177Lu-Lilotomab Satetraxetan Has the Potential to Counteract Resistance to Rituximab in Non-Hodgkin Lymphoma. J Nucl Med 2020; 61:1468-1475. [PMID: 32245896 PMCID: PMC7539655 DOI: 10.2967/jnumed.119.237230] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 01/29/2020] [Indexed: 12/18/2022] Open
Abstract
Patients with non-Hodgkin lymphoma (NHL) who are treated with rituximab may develop resistant disease, often associated with changes in expression of CD20. The next-generation β-particle–emitting radioimmunoconjugate 177Lu-lilotomab-satetraxetan (Betalutin) was shown to up-regulate CD20 expression in different rituximab-sensitive NHL cell lines and to act synergistically with rituximab in a rituximab-sensitive NHL animal model. We hypothesized that 177Lu-lilotomab-satetraxetan may be used to reverse rituximab resistance in NHL. Methods: The rituximab-resistant Raji2R and the parental Raji cell lines were used. CD20 expression was measured by flow cytometry. Antibody-dependent cellular cytotoxicity (ADCC) was measured by a bioluminescence reporter assay. The efficacies of combined treatments with 177Lu-lilotomab-satetraxetan (150 or 350 MBq/kg) and rituximab (4 × 10 mg/kg) were compared with those of single agents or phosphate-buffered saline in a Raji2R-xenograft model. Cox regression and the Bliss independence model were used to assess synergism. Results: Rituximab binding in Raji2R cells was 36% ± 5% of that in the rituximab-sensitive Raji cells. 177Lu-lilotomab-satetraxetan treatment of Raji2R cells increased the binding to 53% ± 3% of the parental cell line. Rituximab ADCC induction in Raji2R cells was 20% ± 2% of that induced in Raji cells, whereas treatment with 177Lu-lilotomab-satetraxetan increased the ADCC induction to 30% ± 3% of that in Raji cells, representing a 50% increase (P < 0.05). The combination of rituximab with 350 MBq/kg 177Lu-lilotomab-satetraxetan synergistically suppressed Raji2R tumor growth in athymic Foxn1nu mice. Conclusion:177Lu-lilotomab-satetraxetan has the potential to reverse rituximab resistance; it can increase rituximab binding and ADCC activity in vitro and can synergistically improve antitumor efficacy in vivo.
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Affiliation(s)
- Marion M Malenge
- Nordic Nanovector ASA, Oslo, Norway.,Department of Radiation Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Sebastian Patzke
- Nordic Nanovector ASA, Oslo, Norway.,Department of Radiation Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
| | - Anne H Ree
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Oncology, Akershus University Hospital, Lørenskog, Norway; and
| | - Trond Stokke
- Department of Radiation Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
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Duehr J, McMahon M, Williamson B, Amanat F, Durbin A, Hawman DW, Noack D, Uhl S, Tan GS, Feldmann H, Krammer F. Neutralizing Monoclonal Antibodies against the Gn and the Gc of the Andes Virus Glycoprotein Spike Complex Protect from Virus Challenge in a Preclinical Hamster Model. mBio 2020; 11:e00028-20. [PMID: 32209676 PMCID: PMC7157512 DOI: 10.1128/mbio.00028-20] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Accepted: 02/14/2020] [Indexed: 01/13/2023] Open
Abstract
Hantaviruses are the etiological agent of hemorrhagic fever with renal syndrome (HFRS) and hantavirus cardiopulmonary syndrome (HCPS). The latter is associated with case fatality rates ranging from 30% to 50%. HCPS cases are rare, with approximately 300 recorded annually in the Americas. Recently, an HCPS outbreak of unprecedented size has been occurring in and around Epuyén, in the southwestern Argentinian state of Chubut. Since November of 2018, at least 29 cases have been laboratory confirmed, and human-to-human transmission is suspected. Despite posing a significant threat to public health, no treatment or vaccine is available for hantaviral disease. Here, we describe an effort to identify, characterize, and develop neutralizing and protective antibodies against the glycoprotein complex (Gn and Gc) of Andes virus (ANDV), the causative agent of the Epuyén outbreak. Using murine hybridoma technology, we generated 19 distinct monoclonal antibodies (MAbs) against ANDV GnGc. When tested for neutralization against a recombinant vesicular stomatitis virus expressing the Andes glycoprotein (GP) (VSV-ANDV), 12 MAbs showed potent neutralization and 8 showed activity in an antibody-dependent cellular cytotoxicity reporter assay. Escape mutant analysis revealed that neutralizing MAbs targeted both the Gn and the Gc. Four MAbs that bound different epitopes were selected for preclinical studies and were found to be 100% protective against lethality in a Syrian hamster model of ANDV infection. These data suggest the existence of a wide array of neutralizing antibody epitopes on hantavirus GnGc with unique properties and mechanisms of action.IMPORTANCE Infections with New World hantaviruses are associated with high case fatality rates, and no specific vaccine or treatment options exist. Furthermore, the biology of the hantaviral GnGc complex, its antigenicity, and its fusion machinery are poorly understood. Protective monoclonal antibodies against GnGc have the potential to be developed into therapeutics against hantaviral disease and are also great tools to elucidate the biology of the glycoprotein complex.
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Affiliation(s)
- James Duehr
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Meagan McMahon
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Brandi Williamson
- Laboratory of Virology, Division of Intramural Research, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, USA
| | - Fatima Amanat
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Alan Durbin
- Infectious Diseases, The J. Craig Venter Institute, La Jolla, California, USA
| | - David W Hawman
- Laboratory of Virology, Division of Intramural Research, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, USA
| | - Danny Noack
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Skyler Uhl
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Gene S Tan
- Infectious Diseases, The J. Craig Venter Institute, La Jolla, California, USA
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Heinz Feldmann
- Laboratory of Virology, Division of Intramural Research, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, USA
| | - Florian Krammer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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33
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Development of reporter gene assays to determine the bioactivity of biopharmaceuticals. Biotechnol Adv 2020; 39:107466. [DOI: 10.1016/j.biotechadv.2019.107466] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 11/02/2019] [Accepted: 11/02/2019] [Indexed: 02/06/2023]
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Tsao LC, Crosby EJ, Trotter TN, Agarwal P, Hwang BJ, Acharya C, Shuptrine CW, Wang T, Wei J, Yang X, Lei G, Liu CX, Rabiola CA, Chodosh LA, Muller WJ, Lyerly HK, Hartman ZC. CD47 blockade augmentation of trastuzumab antitumor efficacy dependent on antibody-dependent cellular phagocytosis. JCI Insight 2019; 4:131882. [PMID: 31689243 PMCID: PMC6975273 DOI: 10.1172/jci.insight.131882] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Accepted: 10/31/2019] [Indexed: 12/14/2022] Open
Abstract
The HER2-specific monoclonal antibody (mAb), trastuzumab, has been the mainstay of therapy for HER2+ breast cancer (BC) for approximately 20 years. However, its therapeutic mechanism of action (MOA) remains unclear, with antitumor responses to trastuzumab remaining heterogeneous and metastatic HER2+ BC remaining incurable. Consequently, understanding its MOA could enable rational strategies to enhance its efficacy. Using both murine and human versions of trastuzumab, we found its antitumor activity dependent on Fcγ receptor stimulation of tumor-associated macrophages (TAMs) and antibody-dependent cellular phagocytosis (ADCP), but not cellular cytotoxicity (ADCC). Trastuzumab also stimulated TAM activation and expansion, but did not require adaptive immunity, natural killer cells, and/or neutrophils. Moreover, inhibition of the innate immune ADCP checkpoint, CD47, significantly enhanced trastuzumab-mediated ADCP and TAM expansion and activation, resulting in the emergence of a unique hyperphagocytic macrophage population, improved antitumor responses, and prolonged survival. In addition, we found that tumor-associated CD47 expression was inversely associated with survival in HER2+ BC patients and that human HER2+ BC xenografts treated with trastuzumab plus CD47 inhibition underwent complete tumor regression. Collectively, our study identifies trastuzumab-mediated ADCP as an important antitumor MOA that may be clinically enabled by CD47 blockade to augment therapeutic efficacy.
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Affiliation(s)
- Li-Chung Tsao
- Department of Surgery, Duke University, Durham, North Carolina, USA
| | - Erika J. Crosby
- Department of Surgery, Duke University, Durham, North Carolina, USA
| | | | - Pankaj Agarwal
- Department of Surgery, Duke University, Durham, North Carolina, USA
| | - Bin-Jin Hwang
- Department of Surgery, Duke University, Durham, North Carolina, USA
| | | | | | - Tao Wang
- Department of Surgery, Duke University, Durham, North Carolina, USA
| | - Junping Wei
- Department of Surgery, Duke University, Durham, North Carolina, USA
| | - Xiao Yang
- Department of Surgery, Duke University, Durham, North Carolina, USA
| | - Gangjun Lei
- Department of Surgery, Duke University, Durham, North Carolina, USA
| | - Cong-Xiao Liu
- Department of Surgery, Duke University, Durham, North Carolina, USA
| | | | - Lewis A. Chodosh
- Department of Cancer Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - William J. Muller
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Herbert Kim Lyerly
- Department of Surgery, Duke University, Durham, North Carolina, USA
- Department of Immunology, and
- Department of Pathology, Duke University, Durham, North Carolina, USA
| | - Zachary C. Hartman
- Department of Surgery, Duke University, Durham, North Carolina, USA
- Department of Pathology, Duke University, Durham, North Carolina, USA
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35
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Lee HY, Register A, Shim J, Contreras E, Wu Q, Jiang G. Characterization of a single reporter-gene potency assay for T-cell-dependent bispecific molecules. MAbs 2019; 11:1245-1253. [PMID: 31348721 PMCID: PMC6748617 DOI: 10.1080/19420862.2019.1640548] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/20/2019] [Accepted: 07/01/2019] [Indexed: 01/07/2023] Open
Abstract
T-cell-dependent bispecific antibodies (TDBs) are promising cancer immunotherapies that recruit patients' T cells to kill cancer cells. There are many TDBs in clinical trials, demonstrating their widely recognized therapeutic potential. However, their complex, multi-step mechanism of action (MoA), which includes bispecific antigen binding, T-cell activation, and target-cell killing, presents unique challenges for biological characterization and potency assay selection. Here, we describe the development of a single reporter-gene potency assay for a TDB (TDB1) that is MoA reflective and sensitive to binding of both antigens. Our reporter-gene assay measures T-cell activation using Jurkat cells engineered to express luciferase under the control of an NFkB response element. The potencies of select samples were measured both by this assay and by a flow-cytometry-based cell-killing assay using human lymphocytes as effector cells. Correlating the two sets of potency results clearly establishes our reporter-gene assay as MoA reflective. Furthermore, correlating potencies for the same panel of samples against binding data measured by binding assays for each individual arm demonstrates that the reporter-gene potency assay reflects dual-antigen binding and can detect changes in affinity for either arm. This work demonstrates that one reporter-gene assay can be used to measure the potency of TDB1 while capturing key aspects of its MoA, thus serving as a useful case study of selection and justification of reporter-gene potency assays for TDBs. Furthermore, our strategy of correlating reporter-gene potency, target-cell killing, and antigen binding for each individual arm serves as a useful example of a thorough, holistic approach to biological characterization for TDBs that can be applied to other bispecific molecules.
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Affiliation(s)
- Ho Young Lee
- Biological Technologies, Department of Analytical Development and Quality Control, Genentech, A member of the Roche group, South San Francisco, CA, USA
| | - Ames Register
- Biological Technologies, Department of Analytical Development and Quality Control, Genentech, A member of the Roche group, South San Francisco, CA, USA
| | - Jeongsup Shim
- Biological Technologies, Department of Analytical Development and Quality Control, Genentech, A member of the Roche group, South San Francisco, CA, USA
| | - Edward Contreras
- Biological Technologies, Department of Analytical Development and Quality Control, Genentech, A member of the Roche group, South San Francisco, CA, USA
| | - Qiang Wu
- Biological Technologies, Department of Analytical Development and Quality Control, Genentech, A member of the Roche group, South San Francisco, CA, USA
| | - Guoying Jiang
- Biological Technologies, Department of Analytical Development and Quality Control, Genentech, A member of the Roche group, South San Francisco, CA, USA
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Chan LLY, Wucherpfennig KW, de Andrade LF. Visualization and quantification of NK cell-mediated cytotoxicity over extended time periods by image cytometry. J Immunol Methods 2019; 469:47-51. [PMID: 30951701 DOI: 10.1016/j.jim.2019.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/28/2019] [Accepted: 04/01/2019] [Indexed: 12/19/2022]
Abstract
Natural killer (NK) cell-mediated cytotoxicity is traditionally measured using the chromium release assay, which measures the fraction of radioactive 51Cr released from dying target cells co-cultured with NK cells. However, the time frame of 51Cr release assays is limited to approximately 4 h due to spontaneous release of 51Cr. In the tumor microenvironment, interactions between NK cells and tumor cells occur over extended time periods, and NK cell-mediated cytotoxicity is modulated by cytokines produced by tumor cells and other immune cells. Here we demonstrate that the interaction of NK cells and tumor cells can be imaged and quantified over an extended period of time using a novel image cytometry method. Specifically, we imaged killing of human ZsGreen+ melanoma cells by primary human NK cells in the presence of an antibody targeting MICA and MICB on the tumor cell surface. The number of live ZsGreen+ A375 cells was counted in 96-well plates over a three day time frame, and the results were used to first calculate % specific killing at the 4 h time point to compare to 51Cr release assay. Analysis of data from the 4 h time point demonstrated that both 51Cr and image cytometry enable sensitive detection of NK cell-mediated killing of tumor cells. Image cytometry demonstrated that the combination of the MICA/B antibody and IL-2 induced near-complete eradication of A375 melanoma cells by NK cells at later time points. This novel image cytometry based approach will be suitable for the discovery of combination therapies that enhance the cytotoxic function of NK cells against tumor cells.
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Affiliation(s)
- Leo Li-Ying Chan
- Department of Technology R&D, Nexcelom Bioscience LLC, Lawrence, MA 01843, United States of America.
| | - Kai W Wucherpfennig
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA 02115, United States of America
| | - Lucas Ferrari de Andrade
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA 02115, United States of America
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37
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Aoyama M, Tada M, Ishii-Watabe A. A Cell-Based Reporter Assay Measuring the Activation of Fc Gamma Receptors Induced by Therapeutic Monoclonal Antibodies. Methods Mol Biol 2019; 1904:423-429. [PMID: 30539484 DOI: 10.1007/978-1-4939-8958-4_21] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fc gamma receptors (FcγRs) are expressed on the surface of various immune cells, and the interactions between FcγRs and the Fc region of immunoglobulin G are involved in the activation of immune cells by antigen-bound antibodies. Fc-mediated immune-cell activations are related to both the efficacy and the safety of therapeutic monoclonal antibodies. It is indispensable to elucidate the Fc-mediated functions in the development of therapeutic monoclonal antibodies. Here, we describe a cell-based assay using FcγR-expressing reporter cell lines that can be used to evaluate the human FcγR-activation properties of therapeutic monoclonal antibodies by a rapid and simple procedure.
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Affiliation(s)
- Michihiko Aoyama
- Division of Biological Chemistry and Biologicals, National Institute of Health Sciences, Kawasaki, Kanagawa, Japan
| | - Minoru Tada
- Division of Biological Chemistry and Biologicals, National Institute of Health Sciences, Kawasaki, Kanagawa, Japan.
| | - Akiko Ishii-Watabe
- Division of Biological Chemistry and Biologicals, National Institute of Health Sciences, Kawasaki, Kanagawa, Japan
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38
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González-González E, Camacho-Sandoval R, Jiménez-Uribe A, Montes-Luna A, Cortés-Paniagua I, Sánchez-Morales J, Muñoz-García L, Tenorio-Calvo AV, López-Morales CA, Velasco-Velázquez MA, Pavón L, Pérez-Tapia SM, Medina-Rivero E. Validation of an ADCC assay using human primary natural killer cells to evaluate biotherapeutic products bearing an Fc region. J Immunol Methods 2018; 464:87-94. [PMID: 30395815 DOI: 10.1016/j.jim.2018.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 10/28/2018] [Accepted: 11/01/2018] [Indexed: 02/06/2023]
Abstract
The development of biotherapeutics requires continuous improvement in analytical methodologies for the assessment of their quality attributes. A subset of biotherapeutics is designed to interact with specific antigens that are exposed on the membranes of target cells or circulating in a soluble form, and effector functions are achieved via recognition of their Fc region by effector cells that induce mechanisms such as antibody-dependent cell-mediated cytotoxicity (ADCC). Thus, ADCC induction is a critical quality attribute (CQA) that must be evaluated to ensure biotherapeutic efficacy. Induction of ADCC can be evaluated by employing effector cells from different sources, such as peripheral blood mononuclear cells (PBMC) and genetically modified cell lines (e.g., transfected NKs or Jurkat cells), and different approaches can be used for detection and results interpretation depending on the type of effector cells used. In this regard, validation of the assays is relevant to ensure the reliability of the results according to the intended purpose. Herein, we show the standardization and validation of ADCC assays to test the potency of three biotherapeutic proteins using primary NK cells obtained from fresh blood as effector cells and detecting cell death by flow cytometry. The advantage of using primary NKs instead of modified cells is that the response is closer to that occurring in vivo since cytotoxicity is evaluated in a direct manner. Our results indicate that in all cases, the assays exhibited a characteristic sigmoidal dose/response curve complying with accurate, precise and specific parameters. Thereby, the validated ADCC assay is an appropriate alternative to evaluate the biological activities of these type of biotherapeutics.
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Affiliation(s)
- Edith González-González
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Rosa Camacho-Sandoval
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Alexis Jiménez-Uribe
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Alejandra Montes-Luna
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Ilselena Cortés-Paniagua
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Jazmín Sánchez-Morales
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Leslie Muñoz-García
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Alejandra V Tenorio-Calvo
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Carlos A López-Morales
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico.
| | - Marco A Velasco-Velázquez
- Departamento de Farmacología y Unidad Periférica de Investigación en Biomedicina Traslacional (CMN 20 de noviembre, ISSSTE), Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico.
| | - Lenin Pavón
- Laboratorio de Psicoinmunología, Dirección de Investigaciones en Neurociencias del Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Ciudad de México, Mexico.
| | - Sonia Mayra Pérez-Tapia
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico.
| | - Emilio Medina-Rivero
- Unidad de Desarrollo e Investigación en Bioprocesos, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico.
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Effect of Peroxide- Versus Alkoxyl-Induced Chemical Oxidation on the Structure, Stability, Aggregation, and Function of a Therapeutic Monoclonal Antibody. J Pharm Sci 2018; 107:2789-2803. [DOI: 10.1016/j.xphs.2018.07.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 06/25/2018] [Accepted: 07/24/2018] [Indexed: 11/22/2022]
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Multiantigenic Modified Vaccinia Virus Ankara Vaccine Vectors To Elicit Potent Humoral and Cellular Immune Reponses against Human Cytomegalovirus in Mice. J Virol 2018; 92:JVI.01012-18. [PMID: 30045984 DOI: 10.1128/jvi.01012-18] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 07/17/2018] [Indexed: 12/14/2022] Open
Abstract
As human cytomegalovirus (HCMV) is a common cause of disease in newborns and transplant recipients, developing an HCMV vaccine is considered a major public health priority. Yet an HCMV vaccine candidate remains elusive. Although the precise HCMV immune correlates of protection are unclear, both humoral and cellular immune responses have been implicated in protection against HCMV infection and disease. Here we describe a vaccine approach based on the well-characterized modified vaccinia virus Ankara (MVA) vector to stimulate robust HCMV humoral and cellular immune responses by an antigen combination composed of the envelope pentamer complex (PC), glycoprotein B (gB), and phosphoprotein 65 (pp65). We show that in mice, multiantigenic MVA vaccine vectors simultaneously expressing all five PC subunits, gB, and pp65 elicit potent complement-independent and complement-dependent HCMV neutralizing antibodies as well as mouse and human MHC-restricted, polyfunctional T cell responses by the individual antigens. In addition, we demonstrate that the PC/gB antigen combination of these multiantigenic MVA vectors can enhance the stimulation of humoral immune responses that mediate in vitro neutralization of different HCMV strains and antibody-dependent cellular cytotoxicity. These results support the use of MVA to develop a multiantigenic vaccine candidate for controlling HCMV infection and disease in different target populations, such as pregnant women and transplant recipients.IMPORTANCE The development of a human cytomegalovirus (HCMV) vaccine to prevent congenital disease and transplantation-related complications is an unmet medical need. While many HCMV vaccine candidates have been developed, partial success in preventing or controlling HCMV infection in women of childbearing age and transplant recipients has been observed with an approach based on envelope glycoprotein B (gB). We introduce a novel vaccine strategy based on the clinically deployable modified vaccinia virus Ankara (MVA) vaccine vector to elicit potent humoral and cellular immune responses by multiple immunodominant HCMV antigens, including gB, phosphoprotein 65, and all five subunits of the pentamer complex. These findings could contribute to development of a multiantigenic vaccine strategy that may afford more protection against HCMV infection and disease than a vaccine approach employing solely gB.
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Li Y, Carpenito C, Wang G, Surguladze D, Forest A, Malabunga M, Murphy M, Zhang Y, Sonyi A, Chin D, Burtrum D, Inigo I, Pennello A, Shen L, Malherbe L, Chen X, Hall G, Haidar JN, Ludwig DL, Novosiadly RD, Kalos M. Discovery and preclinical characterization of the antagonist anti-PD-L1 monoclonal antibody LY3300054. J Immunother Cancer 2018; 6:31. [PMID: 29712568 PMCID: PMC5925824 DOI: 10.1186/s40425-018-0329-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 02/20/2018] [Indexed: 12/25/2022] Open
Abstract
Background Modulation of the PD-1/PD-L1 axis through antagonist antibodies that block either receptor or ligand has been shown to reinvigorate the function of tumor-specific T cells and unleash potent anti-tumor immunity, leading to durable objective responses in a subset of patients across multiple tumor types. Results Here we describe the discovery and preclinical characterization of LY3300054, a fully human IgG1λ monoclonal antibody that binds to human PD-L1 with high affinity and inhibits interactions of PD-L1 with its two cognate receptors PD-1 and CD80. The functional activity of LY3300054 on primary human T cells is evaluated using a series of in vitro T cell functional assays and in vivo models using human-immune reconstituted mice. LY3300054 is shown to induce primary T cell activation in vitro, increase T cell activation in combination with anti-CTLA4 antibody, and to potently enhance anti-tumor alloreactivity in several xenograft mouse tumor models with reconstituted human immune cells. High-content molecular analysis of tumor and peripheral tissues from animals treated with LY3300054 reveals distinct adaptive immune activation signatures, and also previously not described modulation of innate immune pathways. Conclusions LY3300054 is currently being evaluated in phase I clinical trials for oncology indications. Electronic supplementary material The online version of this article (10.1186/s40425-018-0329-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yiwen Li
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA .,0000 0000 2220 2544grid.417540.3Eli Lilly and Company 450 East 29th Street 10016 New York NY USA
| | - Carmine Carpenito
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - George Wang
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - David Surguladze
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Preclinical Pharmacology New York NY USA
| | - Amelie Forest
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - Maria Malabunga
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - Mary Murphy
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - Yiwei Zhang
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Biologics Technology New York NY USA
| | - Andreas Sonyi
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - Darin Chin
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - Douglas Burtrum
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Biologics Technology New York NY USA
| | - Ivan Inigo
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Preclinical Pharmacology New York NY USA
| | - Anthony Pennello
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Preclinical Pharmacology New York NY USA
| | - Leyi Shen
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - Laurent Malherbe
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Non-Clinical Safety Indianapolis IN USA
| | - Xinlei Chen
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Quantitative Biology New York NY USA
| | - Gerald Hall
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - Jaafar N Haidar
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - Dale L Ludwig
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Biologics Technology New York NY USA
| | - Ruslan D Novosiadly
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA
| | - Michael Kalos
- 0000 0000 2220 2544grid.417540.3Lilly Research Laboratories, Department of Cancer Immunobiology New York NY USA .,0000 0000 2220 2544grid.417540.3Eli Lilly and Company 450 East 29th Street 10016 New York NY USA.,grid.430674.2Janssen Pharmaceutical Companies of Johnson and Johnson Springhouse PA USA
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EpCAM Immunotherapy versus Specific Targeted Delivery of Drugs. Cancers (Basel) 2018; 10:cancers10010019. [PMID: 29329202 PMCID: PMC5789369 DOI: 10.3390/cancers10010019] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/08/2018] [Accepted: 01/08/2018] [Indexed: 02/07/2023] Open
Abstract
The epithelial cell adhesion molecule (EpCAM), or CD326, was one of the first cancer associated biomarkers to be discovered. In the last forty years, this biomarker has been investigated for use in personalized cancer therapy, with the first monoclonal antibody, edrecolomab, being trialled in humans more than thirty years ago. Since then, several other monoclonal antibodies have been raised to EpCAM and tested in clinical trials. However, while monoclonal antibody therapy has been investigated against EpCAM for almost 40 years as primary or adjuvant therapy, it has not shown as much promise as initially heralded. In this review, we look at the reasons why and consider alternative targeting options, such as aptamers, to turn this almost ubiquitously expressed epithelial cancer biomarker into a viable target for future personalized therapy.
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Thomas AS, Ghulam-Smith M, Sagar M. Neutralization and beyond: Antibodies and HIV-1 acquisition. CURRENT TOPICS IN VIROLOGY 2018; 15:73-86. [PMID: 31787808 PMCID: PMC6884343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It is widely accepted that an effective HIV-1 preventative vaccine must elicit antibodies that can block virus acquisition. Although, anti-HIV-1 broadly neutralizing antibodies (bnAbs) have been isolated, unfortunately, no vaccine immunogens have been designed that can elicit these bnAbs in uninfected at-risk individuals. Some studies have suggested that other antibody functionalities, besides neutralization, such as antibody-dependent cellular cytotoxicity (ADCC), may prevent HIV-1 acquisition. In contrast to bnAbs, ADCC-inducing antibodies may be more amenable to elicitation by current vaccine technologies. This review will provide clarity about the role of nAbs and ADCC-inducing antibodies in preventing transmission, highlight mechanisms that potentially explain how ADCC-mediating antibodies may work, and speculate about the generation of these novel protective antibodies. Anti-HIV-1 ADCC-inducing antibodies may provide a new avenue for developing an effective HIV-1 vaccine.
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Affiliation(s)
| | | | - Manish Sagar
- Department of Medicine, Boston University, Boston, MA, USA
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44
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Liu B, Guo H, Xu J, Qin T, Guo Q, Gu N, Zhang D, Qian W, Dai J, Hou S, Wang H, Guo Y. Elimination of tumor by CD47/PD-L1 dual-targeting fusion protein that engages innate and adaptive immune responses. MAbs 2017; 10:315-324. [PMID: 29182441 DOI: 10.1080/19420862.2017.1409319] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The host immune system generally serves as a barrier against tumor formation. Programmed death-ligand 1 (PD-L1) is a critical "don't find me" signal to the adaptive immune system, whereas CD47 transmits an anti-phagocytic signal, known as the "don't eat me" signal, to the innate immune system. These and similar immune checkpoints are often overexpressed on human tumors. Thus, dual targeting both innate and adaptive immune checkpoints would likely maximize anti-tumor therapeutic effect and elicit more durable responses. Herein, based on the variable region of atezolizumab and consensus variant 1 (CV1) monomer, we constructed a dual-targeting fusion protein targeting both CD47 and PD-L1 using "Knobs-into-holes" technology, denoted as IAB. It was effective in inducing phagocytosis of tumor cells, stimulating T-cell activation and mediating antibody-dependent cell-mediated cytotoxicity in vitro. No obvious sign of hematological toxicity was observed in mice administered IAB at a dose of 100 mg/kg, and IAB exhibited potent antitumor activity in an immune-competent mouse model of MC38. Additionally, the anti-tumor effect of IAB was impaired by anti-CD8 antibody or clodronate liposomes, which implied that both CD8+ T cells and macrophages were required for the anti-tumor efficacy of IAB and IAB plays an essential role in the engagement of innate and adaptive immune responses. Collectively, these results demonstrate the capacity of an elicited endogenous immune response against tumors and elucidate essential characteristics of synergistic innate and adaptive immune response, and indicate dual blockade of CD47 and PD-L1 by IAB may be a synergistic therapy that activates both innate and adaptive immune response against tumors.
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Affiliation(s)
- Boning Liu
- a Department of Molecular Biology, State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,b Department of Molecular Biology, School of Bioscience and Bioengineering , South China University of Technology , Guangzhou , China.,f Department of Pharmacy for Biologics , Center for Drug Evaluation, China Food and Drug Administration , Beijing , China
| | - Huaizu Guo
- c R&D Department , Shanghai Sinomab Biotechnology Co. , Shanghai , China
| | - Jin Xu
- c R&D Department , Shanghai Sinomab Biotechnology Co. , Shanghai , China
| | - Ting Qin
- a Department of Molecular Biology, State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,b Department of Molecular Biology, School of Bioscience and Bioengineering , South China University of Technology , Guangzhou , China
| | - Qingcheng Guo
- c R&D Department , Shanghai Sinomab Biotechnology Co. , Shanghai , China
| | - Nana Gu
- d R&D Department , Shanghai Zhangjiang Biotechnology Co. , Shanghai , China
| | - Dapeng Zhang
- a Department of Molecular Biology, State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,d R&D Department , Shanghai Zhangjiang Biotechnology Co. , Shanghai , China
| | - Weizhu Qian
- a Department of Molecular Biology, State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,g Department of AIMBL , Institute of Molecular and Cell Biology , Proteos , Singapore
| | - Jianxin Dai
- c R&D Department , Shanghai Sinomab Biotechnology Co. , Shanghai , China
| | - Sheng Hou
- c R&D Department , Shanghai Sinomab Biotechnology Co. , Shanghai , China
| | - Hao Wang
- a Department of Molecular Biology, State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,d R&D Department , Shanghai Zhangjiang Biotechnology Co. , Shanghai , China
| | - Yajun Guo
- a Department of Molecular Biology, State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,e Department of Biopharmaceutical Sciences , School of Pharmacy, Liaocheng University , Liaocheng , China.,g Department of AIMBL , Institute of Molecular and Cell Biology , Proteos , Singapore
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Kelly RM, Kowle RL, Lian Z, Strifler BA, Witcher DR, Parekh BS, Wang T, Frye CC. Modulation of IgG1 immunoeffector function by glycoengineering of the GDP-fucose biosynthesis pathway. Biotechnol Bioeng 2017; 115:705-718. [PMID: 29150961 DOI: 10.1002/bit.26496] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/01/2017] [Accepted: 11/14/2017] [Indexed: 12/13/2022]
Abstract
Cross-linking of the Fcγ receptors expressed on the surface of hematopoietic cells by IgG immune complexes triggers the activation of key immune effector mechanisms, including antibody-dependent cell mediated cytotoxicity (ADCC). A conserved N-glycan positioned at the N-terminal region of the IgG CH 2 domain is critical in maintaining the quaternary structure of the molecule for Fcγ receptor engagement. The removal of a single core fucose residue from the N-glycan results in a considerable increase in affinity for FcγRIIIa leading to an enhanced receptor-mediated immunoeffector function. The enhanced potency of the molecule translates into a number of distinct advantages in the development of IgG antibodies for cancer therapy. In an effort to significantly increase the potency of an anti-CD20, IgG1 molecule, we selectively targeted the de novo GDP-fucose biosynthesis pathway of the host CHO cell line to generate >80% afucosylated IgG1 resulting in enhanced FcγRIIIa binding (13-fold) and in vitro ADCC cell-based activity (11-fold). In addition, this effective glycoengineering strategy also allowed for the utilization of the alternate GDP-fucose salvage pathway to provide a fast and efficient mechanism to manipulate the N-glycan fucosylation level to modulate IgG immune effector function.
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Affiliation(s)
- Ronan M Kelly
- Bioprocess Research and Development, Eli Lilly and Company, Indianapolis, Indiana
| | - Ronald L Kowle
- Bioprocess Research and Development, Eli Lilly and Company, Indianapolis, Indiana
| | - Zhirui Lian
- Bioprocess Research and Development, Eli Lilly and Company, Indianapolis, Indiana
| | - Beth A Strifler
- Biotechnology Discovery Research, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Derrick R Witcher
- Biotechnology Discovery Research, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Bhavin S Parekh
- Bioprocess Research and Development, Eli Lilly and Company, Indianapolis, Indiana
| | - Tongtong Wang
- Bioprocess Research and Development, Eli Lilly and Company, Indianapolis, Indiana
| | - Christopher C Frye
- Bioprocess Research and Development, Eli Lilly and Company, Indianapolis, Indiana
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Tsukimura W, Kurogochi M, Mori M, Osumi K, Matsuda A, Takegawa K, Furukawa K, Shirai T. Preparation and biological activities of anti-HER2 monoclonal antibodies with fully core-fucosylated homogeneous bi-antennary complex-type glycans. Biosci Biotechnol Biochem 2017; 81:2353-2359. [PMID: 29090617 DOI: 10.1080/09168451.2017.1394813] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Recently, the absence of a core-fucose residue in the N-glycan has been implicated to be important for enhancing antibody-dependent cellular cytotoxicity (ADCC) activity of immunoglobulin G monoclonal antibodies (mAbs). Here, we first prepared anti-HER2 mAbs having two core-fucosylated N-glycan chains with the single G2F, G1aF, G1bF, or G0F structure, together with those having two N-glycan chains with a single non-core-fucosylated corresponding structure for comparison, and determined their biological activities. Dissociation constants of mAbs with core-fucosylated N-glycans bound to recombinant Fcγ-receptor type IIIa variant were 10 times higher than those with the non-core-fucosylated N-glycans, regardless of core glycan structures. mAbs with the core-fucosylated N-glycans had markedly reduced ADCC activities, while those with the non-core-fucosylated N-glycans had high activities. These results indicate that the presence of a core-fucose residue in the N-glycan suppresses the binding to the Fc-receptor and the induction of ADCC of anti-HER2 mAbs.
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Affiliation(s)
- Wataru Tsukimura
- a Laboratory of Glyco-Bioengineering , The Noguchi Institute , Tokyo , Japan
| | - Masaki Kurogochi
- b Laboratory of Glyco-Organic Chemistry , The Noguchi Institute , Tokyo , Japan
| | - Masako Mori
- a Laboratory of Glyco-Bioengineering , The Noguchi Institute , Tokyo , Japan
| | - Kenji Osumi
- b Laboratory of Glyco-Organic Chemistry , The Noguchi Institute , Tokyo , Japan
| | - Akio Matsuda
- a Laboratory of Glyco-Bioengineering , The Noguchi Institute , Tokyo , Japan.,b Laboratory of Glyco-Organic Chemistry , The Noguchi Institute , Tokyo , Japan
| | - Kaoru Takegawa
- c Department of Bioscience and Biotechnology, Faculty of Agriculture , Kyushu University , Fukuoka , Japan
| | - Kiyoshi Furukawa
- a Laboratory of Glyco-Bioengineering , The Noguchi Institute , Tokyo , Japan
| | - Takashi Shirai
- a Laboratory of Glyco-Bioengineering , The Noguchi Institute , Tokyo , Japan.,b Laboratory of Glyco-Organic Chemistry , The Noguchi Institute , Tokyo , Japan
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47
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A Novel System for the Quantification of the ADCC Activity of Therapeutic Antibodies. J Immunol Res 2017; 2017:3908289. [PMID: 29104875 PMCID: PMC5635472 DOI: 10.1155/2017/3908289] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/19/2017] [Accepted: 08/01/2017] [Indexed: 11/23/2022] Open
Abstract
Novel ADCC effector cells expressing the V-variant or F-variant of FcγRIIIa (CD16a) and firefly luciferase under the control of a chimeric promoter incorporating recognition sequences for the principal transcription factors involved in FcγRIIIa signal transduction, together with novel target cells overexpressing a constant high level of the specific antigen recognized by rituximab, trastuzumab, cetuximab, infliximab, adalimumab, or etanercept, confer improved sensitivity, specificity, and dynamic range in an ADCC assay relative to effector cells expressing a NFAT-regulated reporter gene and wild-type target cells. The effector cells also contain a normalization gene rendering ADCC assays independent of cell number or serum matrix effects. The novel effector and target cells in a frozen thaw-and-use format exhibit low vial-to-vial and lot-to-lot variation in their performance characteristics reflected by CVs of 10% or less. Homologous control target cells in which the specific target gene has been invalidated by genome editing providing an ideal control and a means of correcting for nonspecific effects were observed with certain samples of human serum. The novel effector cells and target cells expressing noncleavable membrane-bound TNFα have been used to quantify ADCC activity in serum from patients with Crohn's disease treated with infliximab and to relate ADCC activity to drug levels.
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48
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Novel prostate cancer immunotherapy with a DNA-encoded anti-prostate-specific membrane antigen monoclonal antibody. Cancer Immunol Immunother 2017; 66:1577-1588. [PMID: 28819703 PMCID: PMC5676807 DOI: 10.1007/s00262-017-2042-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 07/12/2017] [Indexed: 12/12/2022]
Abstract
Prostate-specific membrane antigen (PSMA) is expressed at high levels on malignant prostate cells and is likely an important therapeutic target for the treatment of prostate carcinoma. Current immunotherapy approaches to target PSMA include peptide, cell, vector or DNA-based vaccines as well as passive administration of PSMA-specific monoclonal antibodies (mAb). Conventional mAb immunotherapy has numerous logistical and practical limitations, including high production costs and a requirement for frequent dosing due to short mAb serum half-life. In this report, we describe a novel strategy of antibody-based immunotherapy against prostate carcinoma that utilizes synthetic DNA plasmids that encode a therapeutic human mAb that target PSMA. Electroporation-enhanced intramuscular injection of the DNA-encoded mAb (DMAb) plasmid into mice led to the production of functional and durable levels of the anti-PSMA antibody. The anti-PSMA produced in vivo controlled tumor growth and prolonged survival in a mouse model. This is likely mediated by antibody-dependent cellular cytotoxicity (ADCC) effect with the aid of NK cells. Further study of this novel approach for treatment of human prostate disease and other malignant conditions is warranted.
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Surrogate CD16-expressing effector cell lines for determining the bioactivity of therapeutic monoclonal antibodies. J Pharm Biomed Anal 2017; 143:188-198. [PMID: 28605680 DOI: 10.1016/j.jpba.2017.06.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 06/01/2017] [Accepted: 06/03/2017] [Indexed: 12/12/2022]
Abstract
Traditional antibody dependent cellular cytotoxicity (ADCC) assays use donor derived natural killer (NK) or peripheral blood mononuclear cells, but donor genetic variability and the technically challenging nature of the assay means that alternative in vitro assay formats are required. We explored the utility of two reporter gene cell lines, the J2 and J9, as surrogate effector cells for ADCC assays. Both express the ADCC relevant Fcγ receptor CD16, crosslinking of which leads to firefly luciferase expression. For anti-CD20 rituximab and anti-HER2 trastuzumab (both IgG1 monoclonal antibodies, mAbs) a dose dependent firefly luciferase response was observed exclusively in the presence of their respective targets, representing the molecular interaction which potentiates ADCC activity. Importantly, both surrogate effector and NK cell based assays gave statistically similar values for rituximab ADCC activity. Increased engagement with target cell bound mAbs was determined to be cytotoxic for the J2 and J9 cell lines at the assay end point (at which luciferase expression is measured). However, use of the J9 cells containing the constitutively expressed renilla luciferase gene enabled data normalisation and corrected for fluctuations in both cell number and viability providing an advantage over currently available surrogate effector cell-lines. Abrogated ADCC activity with IgG4 mAbs, but enhanced activity with an IgG1 non-fucosylated mAb, was seen with the J9 cell line, as expected. Additionally, two rituximab products (biosimilars in development) with similar binding by flow cytometry, N-glycan profiles using HPLC and CD16 binding by surface plasmon resonance showed comparable ADCC activity to Mabthera. The ADCC activity of another anti-CD20 mAb, ofatumumab, reported only with primary cell based assays to date was also measured. This is the first report of a dual reporter gene based ADCC assay.
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Montacir O, Montacir H, Eravci M, Springer A, Hinderlich S, Saadati A, Parr MK. Comparability study of Rituximab originator and follow-on biopharmaceutical. J Pharm Biomed Anal 2017; 140:239-251. [DOI: 10.1016/j.jpba.2017.03.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 03/14/2017] [Accepted: 03/15/2017] [Indexed: 10/19/2022]
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