1
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Loyau J, Monney T, Montefiori M, Bokhovchuk F, Streuli J, Blackburn M, Goepfert A, Caro LN, Chakraborti S, De Angelis S, Grandclément C, Blein S, Mbow ML, Srivastava A, Perro M, Sammicheli S, Zhukovsky EA, Dyson M, Dreyfus C. Biparatopic binding of ISB 1442 to CD38 in trans enables increased cell antibody density and increased avidity. MAbs 2025; 17:2457471. [PMID: 39882744 PMCID: PMC11784651 DOI: 10.1080/19420862.2025.2457471] [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: 10/17/2024] [Revised: 01/13/2025] [Accepted: 01/19/2025] [Indexed: 01/31/2025] Open
Abstract
ISB 1442 is a bispecific biparatopic antibody in clinical development to treat hematological malignancies. It consists of two adjacent anti-CD38 arms targeting non-overlapping epitopes that preferentially drive binding to tumor cells and a low-affinity anti-CD47 arm to enable avidity-induced blocking of proximal CD47 receptors. We previously reported the pharmacology of ISB 1442, designed to reestablish synthetic immunity in CD38+ hematological malignancies. Here, we describe the discovery, optimization and characterization of the ISB 1442 antigen binding fragment (Fab) arms, their assembly to 2 + 1 format, and present the high-resolution co-crystal structures of the two anti-CD38 Fabs, in complex with CD38. This, with biophysical and functional assays, elucidated the underlying mechanism of action of ISB 1442. In solution phase, ISB 1442 forms a 2:2 complex with CD38 as determined by size-exclusion chromatography with multi-angle light scattering and electron microscopy. The predicted antibody-antigen stoichiometries at different CD38 surface densities were experimentally validated by surface plasmon resonance and cell binding assays. The specific design and structural features of ISB 1442 enable: 1) enhanced trans binding to adjacent CD38 molecules to increase Fc density at the cancer cell surface; 2) prevention of avid cis binding to monomeric CD38 to minimize blockade by soluble shed CD38; and 3) greater binding avidity, with a slower off-rate at high CD38 density, for increased specificity. The superior CD38 targeting of ISB 1442, at both high and low receptor densities, by its biparatopic design, will enhance proximal CD47 blockade and thus counteract a major tumor escape mechanism in multiple myeloma patients.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Mario Perro
- Ichnos Glenmark Innovation, New York, NY, USA
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2
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Bartsch YC, Webb NE, Burgess E, Kang J, Lauffenburger DA, Julg BD. Combinatorial Fc modifications for complementary antibody functionality. MAbs 2025; 17:2465391. [PMID: 39950649 PMCID: PMC11834420 DOI: 10.1080/19420862.2025.2465391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2024] [Revised: 02/04/2025] [Accepted: 02/05/2025] [Indexed: 02/20/2025] Open
Abstract
Therapeutic monoclonal antibodies (mAbs) can be functionally enhanced via Fc engineering. To determine whether pairs of mAbs with different Fc modifications can be combined for functional complementarity, we investigated the in vitro activity of two HIV-1 mAb libraries, each equipped with 60 engineered Fc variants. Our findings demonstrate that the impact of Fc engineering on Fc functionality is dependent on the specific Fab clone. Notably, combinations of Fc variants of the same Fab specificity exhibited limited enhancement in functional breadth compared to combinations involving two distinct Fabs. This suggests that the strategic selection of complementary Fc modifications can enhance both functional activity and breadth. Furthermore, while some combinations of Fc variants displayed additive functional effects, others were detrimental, suggesting that the functional outcome of Fc mutations is not easily predicted. Collectively, these results provide preliminary evidence supporting the potential of complementary Fc modifications in mAb combinations. Future studies will be essential to identify the optimal Fc modifications that maximize in vivo efficacy.
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Affiliation(s)
- Yannic C. Bartsch
- Ragon Institute of Mass General, MIT, and Harvard, Cambridge, Massachusetts, USA
- Laboratory of Anti-Viral Antibody-Omics, TWINCORE-Institute for Experimental Infection Research, Helmholtz Center for Infection Research (HZI) and Medical School Hannover (MHH) and Cluster of Excellence RESIST (EXC 2155), Hannover, Germany
| | - Nicholas E. Webb
- Ragon Institute of Mass General, MIT, and Harvard, Cambridge, Massachusetts, USA
| | - Eleanor Burgess
- Ragon Institute of Mass General, MIT, and Harvard, Cambridge, Massachusetts, USA
| | - Jaewon Kang
- Ragon Institute of Mass General, MIT, and Harvard, Cambridge, Massachusetts, USA
| | | | - Boris D. Julg
- Ragon Institute of Mass General, MIT, and Harvard, Cambridge, Massachusetts, USA
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3
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Kisalu NK, Silva Pereira LD, Herman JD, Asokan M, Ernste K, Merriam J, Liu C, DeMouth ME, Pegu A, Lofgren M, Dillon M, Bonilla B, MacVicar R, Zur Y, Kiyuka P, Flores-Garcia Y, Chakraborty S, Nikolaeva D, Ogwang R, Flynn B, Francica J, Pierson TC, Koup RA, Zavala F, Wang TT, Alter G, Idris AH, Seder RA. FcγR binding differentially contributes to protection by two human monoclonal antibodies targeting Plasmodium falciparum circumsporozoite protein. Sci Transl Med 2025; 17:eadk6745. [PMID: 40267218 DOI: 10.1126/scitranslmed.adk6745] [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: 09/21/2023] [Revised: 09/25/2024] [Accepted: 03/05/2025] [Indexed: 04/25/2025]
Abstract
Antibodies mediate protection against a wide range of pathogens through binding and neutralizing the pathogen or through Fc-mediated effector functions. Human monoclonal antibodies (mAbs) CIS43LS and L9LS show high-affinity binding targeting distinct regions on the Plasmodium falciparum circumsporozoite protein (PfCSP) and are highly effective in preventing malaria in humans. However, the role of FcγR binding in protection by these mAbs has not been determined. Here, we assessed several Fc variants of CIS43LS and L9LS for protection against infection with transgenic Plasmodium berghei parasite expressing PfCSP in mice. Limiting binding to FcγRs did not reduce protection compared to the parental mAbs in mice. To determine whether protection could be improved in vivo by Fc modification, we engineered Fc variant mAbs with increased binding to distinct FcγRs. Passive transfer of CIS43LS-DE and CIS43LS-DEAL variants resulted in an approximately two- to threefold reduction in the liver-stage parasite burden in C57BL/6 or human FcγR mice compared with the parental CIS43LS after challenge. CIS43LS-DEAL also enhanced protection of mice after mosquito bite challenge. Systems serology analysis revealed that the CIS43LS-DE and CIS43LS-DEAL variants could enhance human neutrophil and monocyte phagocytosis, as well as NK cell activation, compared with CIS43LS. However, similar Fc modifications incorporated into L9LS did not increase protection compared to the parental mAb. Overall, although FcγR binding by CIS43LS and L9LS is dispensable in mouse models of malaria, enhancing the binding of CIS43LS to FcγR showed a modest increase in the potency of this mAb.
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Affiliation(s)
- Neville K Kisalu
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Lais D Silva Pereira
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Jonathan D Herman
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Cambridge, MA 02139, USA
| | - Mangaiarkarasi Asokan
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Keenan Ernste
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Jonah Merriam
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Cuiping Liu
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Megan E DeMouth
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Amarendra Pegu
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Mariah Lofgren
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Marlon Dillon
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Brian Bonilla
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Ryan MacVicar
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Cambridge, MA 02139, USA
| | - Yonatan Zur
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Cambridge, MA 02139, USA
| | - Patience Kiyuka
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Yevel Flores-Garcia
- Malaria Research Institute, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Saborni Chakraborty
- Institute for Immunity, Transplantation, and Infection, Stanford University School of Medicine and Department of Medicine, Division of Infectious Diseases, Stanford University, Stanford, CA 94305, USA
| | - Daria Nikolaeva
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, MD 20892, USA
| | - Rodney Ogwang
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Barbara Flynn
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Joseph Francica
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Theodore C Pierson
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Richard A Koup
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
| | - Fidel Zavala
- Malaria Research Institute, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Taia T Wang
- Institute for Immunity, Transplantation, and Infection, Stanford University School of Medicine and Department of Medicine, Division of Infectious Diseases, Stanford University, Stanford, CA 94305, USA
| | - Galit Alter
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Cambridge, MA 02139, USA
| | - Azza H Idris
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Cambridge, MA 02139, USA
| | - Robert A Seder
- Vaccine Research Center (VRC), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD 20892, USA
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Robinson J, Vats M, Hartmann M. Implementation of multimodal anion exchange chromatography to address product quality challenges and downstream platform limitations: A case study. J Chromatogr A 2025; 1746:465784. [PMID: 39983562 DOI: 10.1016/j.chroma.2025.465784] [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: 09/09/2024] [Revised: 01/26/2025] [Accepted: 02/15/2025] [Indexed: 02/23/2025]
Abstract
Flow through anion exchange chromatography (AEX) has provided reliable process-and product-related impurities removal as well as viral clearance for monoclonal antibodies (mAbs). The application of AEX to molecules with more complex impurity profiles or non-platform characteristics such as a low pI can become challenging because viral clearance considerations often constrain the AEX step design space. Multimodal anion exchange chromatography (MMAEX) can address the limitations of the platform AEX step while still allowing a "platform-like" manufacturing process. This work presents a case study on polishing step development for a Fc-fusion protein with pI < 6.5, high surface hydrophobicity, and aggregate content of up to 35% in the harvested cell culture fluid. An integrated computational and experimental high throughput screening (HTS) workflow was implemented to rapidly identify the MMAEX resin Capto Adhere at pH 5.5 as a viable alternative to the conventional AEX flow through polishing step. This work presents the impact of pH, conductivity, load, and load impurity level/composition on MMAEX step performance. Step performance was measured based on yield, HMW clearance, residual HCP and DNA clearance, as well as viral clearance. HMW clearance varied based on the starting load HMW level (from 5 -35%) and the highest relative clearance was obtained at a moderate HMW load level. Residual HCP and DNA showed a strong dependance on load HMW level, highlighting the competitive adsorption behavior that can impact resin-protein interactions in complex mixtures. Both residual HCP and DNA were removed to below quantification at pH 5.5. Viral clearance of up to 4 logs of XMULV and MVM was demonstrated at pH 5.5 using process relevant feed streams. The workflow presented here demonstrates how the integration of in silico modeling and high throughput screening (HTS) can streamline process development and enable rapid polishing step optimization. These results also underscore the impact of feed impurity and impurity composition on MMAEX resin performance.
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Affiliation(s)
- Julie Robinson
- Biologics Process Research and Development, Merck & Co., Inc., Rahway NJ 07065 USA.
| | - Mayank Vats
- Biologics Process Research and Development, Merck & Co., Inc., Rahway NJ 07065 USA
| | - Michael Hartmann
- Modeling and Informatics, Merck & Co., Inc., Rahway NJ 07065 USA
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5
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Heydarchi B, D'Silva DB, Wong H, Goddard-Borger ED, Wicks IP. Fc mutagenesis enhances the functionality of anti-RhD monoclonal antibodies. Blood Adv 2025; 9:1522-1533. [PMID: 39705537 PMCID: PMC11985048 DOI: 10.1182/bloodadvances.2024015082] [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: 10/15/2024] [Revised: 11/20/2024] [Accepted: 11/20/2024] [Indexed: 12/22/2024] Open
Abstract
ABSTRACT Hemolytic disease of the fetus and newborn (HDFN) due to Rhesus D (RhD) antigen mismatch between the mother and fetus has been a significant cause of neonatal jaundice, recurrent miscarriage, and stillbirth throughout history. Polyclonal anti-RhD immunoglobulin G (RhD-pIgG), derived from the plasma of RhD-negative donors immunized with RhD-positive red blood cells (RBCs), has reduced the incidence of HDFN, but this approach is currently restricted to developed countries. Monoclonal antibodies (mAbs) offer a promising alternative to address this pressing need, but prior attempts to develop effective anti-RhD mAbs have failed, in some cases, due to differences in fucosylation patterns between mAbs produced in cell lines and RhD-pIgG. Chinese hamster ovary (CHO) cell lines, commonly used for pharmaceutical protein production, induce high levels of fucosylation, reducing the antibody-dependent cellular cytotoxicity (ADCC) activity crucial for clearing RhD-positive RBCs. In contrast, RhD-pIgG has lower fucosylation levels, which enhances ADCC activity. Regulating the glycan levels of mAbs during production requires specialized cell lines and culture conditions. In this study, we took an alternative approach through antibody engineering. The Fragment crystallizable (Fc) regions of 2 existing anti-RhD mAbs (Brad3 and Fog1) were subjected to mutagenesis to introduce ADCC-enhancing mutations and then expressed in CHO cells under standard conditions. We demonstrate that targeted Fc mutagenesis significantly enhanced ADCC compared with the wild-type mAbs, while preserving RhD binding and efficient production in CHO cells. Furthermore, these Fc variants achieved comparable efficacy with RhD-pIgG, suggesting a new strategy for producing anti-RhD mAbs with improved functionality, without the need for glycoengineering.
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Affiliation(s)
- Behnaz Heydarchi
- Inflammation Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- Department of Medical Biology, The University of Melbourne, Parkville, Australia
| | - Damian B. D'Silva
- Inflammation Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- Department of Medical Biology, The University of Melbourne, Parkville, Australia
| | - Huon Wong
- Inflammation Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- Department of Medical Biology, The University of Melbourne, Parkville, Australia
| | - Ethan D. Goddard-Borger
- Department of Medical Biology, The University of Melbourne, Parkville, Australia
- Chemical Biology Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
| | - Ian P. Wicks
- Inflammation Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- Department of Medical Biology, The University of Melbourne, Parkville, Australia
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6
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Twomey JD, George S, Zhang B. Fc gamma receptor polymorphisms in antibody therapy: implications for bioassay development to enhance product quality. Antib Ther 2025; 8:87-98. [PMID: 40177643 PMCID: PMC11959696 DOI: 10.1093/abt/tbaf003] [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] [Received: 10/16/2024] [Revised: 01/07/2025] [Accepted: 01/20/2025] [Indexed: 04/05/2025] Open
Abstract
The effectiveness of therapeutic antibodies is often associated with their Fc-mediated effector functions, such as antibody-dependent cellular cytotoxicity and antibody-dependent cellular phagocytosis. These functions rely on interactions between Fc gamma receptors (FcγRs) on immune cells and the Fc region of antibodies. Genetic variations in these receptors, known as FcγR polymorphisms, can influence therapeutic outcomes by altering receptor expression levels, affinity, and function. This review examines the impact of FcγR polymorphisms on antibody therapy, emphasizing their role in developing and optimizing functional bioassays to assess product quality. Understanding these polymorphisms is essential for refining bioassays, which are crucial for accurately characterizing antibody products and ensuring consistency in manufacturing processes.
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Affiliation(s)
- Julianne D Twomey
- Office of Pharmaceutical Quality Research, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993, United States
| | - Sasha George
- Office of Pharmaceutical Quality Research, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993, United States
| | - Baolin Zhang
- Office of Pharmaceutical Quality Research, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993, United States
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7
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Klenchin VA, Clark NM, Keles NK, Capuano S, Mason R, Gao G, Broman A, Kose E, Immonen TT, Fennessey CM, Keele BF, Lifson JD, Roederer M, Gardner MR, Evans DT. Adeno-associated viral delivery of Env-specific antibodies prevents SIV rebound after discontinuing antiretroviral therapy. Sci Immunol 2025; 10:eadq4973. [PMID: 40020046 DOI: 10.1126/sciimmunol.adq4973] [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: 05/16/2024] [Accepted: 02/03/2025] [Indexed: 03/05/2025]
Abstract
An alternative to lifelong antiretroviral therapy (ART) is needed to achieve durable control of HIV-1. Here, we show that adeno-associated virus (AAV) delivery of two rhesus macaque antibodies to the simian immunodeficiency virus (SIV) envelope glycoprotein (Env) with potent neutralization and antibody-dependent cellular cytotoxicity can prevent viral rebound in macaques infected with barcoded SIVmac239M after discontinuing suppressive ART. After AAV administration, sustained antibody expression with minimal antidrug antibody responses was achieved in all but one animal. After ART withdrawal, SIV replication rebounded within 2 weeks in all control animals but remained <15 copies per milliliter in plasma for more than a year in four of the eight animals that received AAV vectors encoding Env-specific antibodies. Viral sequences from animals that rebounded with delayed kinetics exhibited restricted clonal diversity and antibody escape mutations in Env. Thus, sustained expression of antibodies with potent antiviral activity can afford durable, ART-free containment of pathogenic SIV infection.
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Affiliation(s)
- Vadim A Klenchin
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Natasha M Clark
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Nida K Keles
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Saverio Capuano
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI 53715, USA
| | - Rosemarie Mason
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Guangping Gao
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Aimee Broman
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Emek Kose
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Taina T Immonen
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Christine M Fennessey
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Brandon F Keele
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Jeffrey D Lifson
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Mario Roederer
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Matthew R Gardner
- Division of Infectious Diseases, Department of Medicine, Emory University, Atlanta, GA 30329, USA
- Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, GA 30329, USA
| | - David T Evans
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705, USA
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI 53715, USA
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8
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Kowash RR, Sabnani M, Gray LT, Deng Q, Saleh NUA, Girard L, Naito Y, Masahiro K, Minna JD, Gerber DE, Koyama S, Liu ZL, Baruah H, Akbay EA. Novel and potent MICA/B antibody is therapeutically effective in KRAS LKB1 mutant lung cancer models. J Immunother Cancer 2025; 13:e009867. [PMID: 39762078 PMCID: PMC11749492 DOI: 10.1136/jitc-2024-009867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Accepted: 11/30/2024] [Indexed: 01/11/2025] Open
Abstract
BACKGROUND Concurrent KRAS LKB1 (STK11, KL) mutant non-small cell lung cancers (NSCLC) do not respond well to current immune checkpoint blockade therapies, however targeting major histocompatibility complex class I-related chain A or B (MICA/B), could pose an alternative therapeutic strategy through activation of natural killer (NK) cells. METHODS Expression of NK cell activating ligands in NSCLC cell line and patient data were analyzed. Cell surface expression of MICA/B in NSCLC cell lines was determined through flow cytometry while ligand shedding in both patient blood and cell lines was determined through ELISA. We engineered an antibody-dependent cellular cytotoxicity (ADCC) enhanced MICA/B monoclonal antibody, AHA-1031, which prevents ligand shedding without interfering with binding to natural killer group 2D while targeting cancer cells via superior ADCC. We performed in vitro assays using ELISA and flow cytometry-based assays to confirm that our antibody potently binds to and stabilizes MICA/B expression across lung cancer and other solid tumor cell lines. Additionally, we used two KL mutant NSCLC cell lines and a KL mutant patient-derived xenograft (PDX) model to demonstrate in vivo antitumor efficacy and flow cytometry analysis for immune cell activation profiling. RESULTS NSCLC cell lines exhibit high MICA/B expression and secrete soluble MICA/B in vitro. Soluble MICA/B is also detected in patient blood samples. AHA-1031 binds to the α3 domain of MICA/B, preventing shedding and targeting tumor cells to ADCC. AHA-1031 exhibits high affinity and specificity to MICA/B, preventing MICA/B shedding in tumor lines and inducing ADCC in vitro. Our antibody also effectively binds and stabilizes MICA/B expression in additional tumor types and demonstrates broad specificity. We show that in two KL mutant NSCLC xenograft models and a KL mutant PDX model, treatment with AHA-1031 monotherapy significantly inhibits tumor growth compared with vehicle-treated animals with no observable toxicity. Tumor tissues from treated mice exhibit significantly increased immune cell infiltrates and activated NK cell populations. CONCLUSIONS Activating NK cells through MICA/B stabilization and inducing ADCC offers an alternative and potent therapy option in KL tumors. MICA/B are shed across different tumors making this therapeutic strategy universally applicable.
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Affiliation(s)
- Ryan R Kowash
- Department of Pathology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, USA
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | | | | | - Qing Deng
- Department of Pathology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, USA
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Nusrat U A Saleh
- Department of Pathology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, USA
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Luc Girard
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Hamon Center for Therapeutic Oncology Research, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Yujiro Naito
- Department of Respiratory Medicine and Clinical Immunology, Osaka University, Suita, Japan
| | - Kentaro Masahiro
- Department of Respiratory Medicine and Clinical Immunology, Osaka University, Suita, Japan
| | - John D Minna
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Hamon Center for Therapeutic Oncology Research, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Department of Pharmacology, UT Southwestern Medical School, Dallas, Texas, USA
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - David E Gerber
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Shohei Koyama
- Exploratory Oncology Research and Clinical Trial Center (EPOC), National Cancer Center Japan, Kashiwa, Japan
| | - Zhiqian Lucy Liu
- Alloy Therapeutics Inc, Lexington, Massachusetts, USA
- Alloy Therapeutics, Lexington, Massachusetts, USA
| | | | - Esra A Akbay
- Department of Pathology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, USA
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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9
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Pirosa MC, Stathis A, Zucca E. Tafasitamab for the treatment of patients with diffuse large B-cell lymphoma. Hum Vaccin Immunother 2024; 20:2309701. [PMID: 38299612 PMCID: PMC10841029 DOI: 10.1080/21645515.2024.2309701] [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: 11/07/2023] [Accepted: 01/21/2024] [Indexed: 02/02/2024] Open
Abstract
Patients with relapsed or refractory (R/R) diffuse large B-cell lymphoma (DLBCL) require additional treatments, especially those not eligible or not responding to high dose cytotoxic chemotherapy and stem cell transplantation. Over the last few years, several new treatments have been developed and approved for these patients, among them of particular relevance are those targeting CD19. Tafasitamab is a humanized monoclonal antibody targeting CD19, composed of a modified fragment crystallizable (Fc) region engineered with higher affinity for Fc gamma receptors (FcγR) receptors, leading to increased cytotoxicity through natural killer cells and macrophages (antibody-dependent cellular cytotoxicity and antibody-dependent cell-mediated phagocytosis). In this product review, we will discuss its mechanism of action, safety profile and efficacy results from clinical trials that led to its approval in combination with lenalidomide for patients with R/R DLBCL ineligible for high-dose chemotherapy and autologous transplantation.
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Affiliation(s)
- Maria Cristina Pirosa
- Clinic of Medical Oncology, Oncology Institute of Southern Switzerland, Bellinzona, Switzerland
- Institute of Oncology Research, Bellinzona, Switzerland
- Faculty of Biomedical Science, Universita’ della Svizzera italiana, Lugano, Switzerland
| | - Anastasios Stathis
- Clinic of Medical Oncology, Oncology Institute of Southern Switzerland, Bellinzona, Switzerland
- Faculty of Biomedical Science, Universita’ della Svizzera italiana, Lugano, Switzerland
| | - Emanuele Zucca
- Clinic of Medical Oncology, Oncology Institute of Southern Switzerland, Bellinzona, Switzerland
- Institute of Oncology Research, Bellinzona, Switzerland
- Faculty of Biomedical Science, Universita’ della Svizzera italiana, Lugano, Switzerland
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10
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Chang HP, Liu S, Shah DK. PK/PD Evaluation of Antibody-Drug Conjugates with Enhanced Immune Effector Functions. AAPS J 2024; 27:18. [PMID: 39702683 DOI: 10.1208/s12248-024-00998-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2024] [Accepted: 11/12/2024] [Indexed: 12/21/2024] Open
Abstract
Optimizing the interaction between antibody (mAb)-based therapeutics and immune effector functions (EFs) offers opportunities to improve the therapeutic window of these molecules. However, the role of EFs in antibody-drug conjugate (ADC) efficacy and toxicity remains unknown, with limited studies that have investigated how modulation of EF affects the pharmacology of ADCs. This study aimed to evaluate the effect of EF modulation on ADC efficacy using trastuzumab-vc-MMAE as a model ADC. A series of ADCs with enhanced or eradicated EF were synthesized through Fc engineering of the antibody. Cell-based assays confirmed that the alteration of EFs in ADCs did not change their in vitro potency, and the conjugation of vc-MMAE did not alter the trends in EFs modulation. Pharmacokinetic/pharmacodynamic (PK/PD) studies of Fc engineered ADCs were conducted in a syngeneic mouse system. The enhancement of EFs led to lower systemic exposure, faster clearance, and potentially enhanced tissue distribution and accumulation of ADCs. ADCs with enhanced EFs demonstrated improved efficacy in the syngeneic mouse tumor model, which was quantitatively confirmed by PK/PD modeling. The model indicated that EF enhancement was synergistic for ADC efficacy, whereas the complete removal of EF was less than additive. Our study suggests that developing ADCs with enhanced EF may improve the therapeutic effectiveness of ADCs, although the effect of this modification on ADC safety and extrapolation of our findings to other ADCs necessitates further investigation.
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Affiliation(s)
- Hsuan-Ping Chang
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, 455 Pharmacy Building, Buffalo, New York, 14214-8033, USA
| | - Shufang Liu
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, 455 Pharmacy Building, Buffalo, New York, 14214-8033, USA
| | - Dhaval K Shah
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, 455 Pharmacy Building, Buffalo, New York, 14214-8033, USA.
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11
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Chand D, Savitsky DA, Krishnan S, Mednick G, Delepine C, Garcia-Broncano P, Soh KT, Wu W, Wilkens MK, Udartseva O, Vincent S, Joshi B, Keith JG, Manrique M, Marques M, Tanne A, Levey DL, Han H, Ng S, Ridpath J, Huber O, Morin B, Galand C, Bourdelais S, Gombos RB, Ward R, Qin Y, Waight JD, Costa MR, Sebastian-Yague A, Rudqvist NP, Pupecka-Swider M, Venkatraman V, Slee A, Patel JM, Grossman JE, Wilson NS, Von Hoff DD, Stebbing J, Curiel TJ, Buell JS, O’Day SJ, Stein RB. Botensilimab, an Fc-Enhanced Anti-CTLA-4 Antibody, Is Effective against Tumors Poorly Responsive to Conventional Immunotherapy. Cancer Discov 2024; 14:2407-2429. [PMID: 39083809 PMCID: PMC11609826 DOI: 10.1158/2159-8290.cd-24-0190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 06/17/2024] [Accepted: 07/29/2024] [Indexed: 08/02/2024]
Abstract
SIGNIFICANCE This study reveals that Fc-enhanced anti-CTLA-4 harnesses novel mechanisms to overcome the limitations of conventional anti-CTLA-4, effectively treating poorly immunogenic and treatment-refractory cancers. Our findings support the development of a new class of immuno-oncology agents, capable of extending clinical benefit to patients with cancers resistant to current immunotherapies.
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Affiliation(s)
| | | | | | | | | | | | | | - Wei Wu
- Agenus Inc, Lexington, Massachusetts
| | | | | | | | | | | | | | | | | | | | - Haiyong Han
- The Translational Genomics Research Institute, Phoenix, Arizona
| | - Serina Ng
- The Translational Genomics Research Institute, Phoenix, Arizona
| | | | | | | | | | | | | | | | - Yu Qin
- Agenus Inc, Lexington, Massachusetts
| | | | | | | | | | | | | | | | | | | | | | | | | | - Tyler J. Curiel
- Agenus Inc, Lexington, Massachusetts
- Dartmouth Cancer Center and the Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
| | - Jennifer S. Buell
- Agenus Inc, Lexington, Massachusetts
- MiNK Therapeutics, Lexington, Massachusetts
| | | | - Robert B. Stein
- Agenus Inc, Lexington, Massachusetts
- MiNK Therapeutics, Lexington, Massachusetts
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12
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Feng Y, Deyanat-Yazdi G, Newburn K, Potter S, Wortinger M, Ramirez M, Truhlar SME, Yachi PP. PD-1 antibody interactions with Fc gamma receptors enable PD-1 agonism to inhibit T cell activation - therapeutic implications for autoimmunity. J Autoimmun 2024; 149:103339. [PMID: 39608214 DOI: 10.1016/j.jaut.2024.103339] [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: 11/21/2023] [Revised: 08/30/2024] [Accepted: 11/12/2024] [Indexed: 11/30/2024]
Abstract
PD-1 has emerged as a central inhibitory checkpoint receptor in maintaining immune homeostasis and as a target in cancer immunotherapies. However, targeting PD-1 for the treatment of autoimmune diseases has been more challenging. We recently showed in a phase 2a trial that PD-1 could be stimulated with the PD-1 agonist antibody peresolimab to treat rheumatoid arthritis. Here, we demonstrate that PD-1 antibodies can elicit agonism and inhibit T cell activation by co-localization of PD-1 with the T cell receptor via Fcγ receptor (FcγR) engagement. Three PD-1 agonist antibodies with different antigen binding domains, including the clinically validated PD-1 blocking antibody pembrolizumab, suppressed T cell activation to a similar degree; this finding suggests that a specific PD-1-binding epitope is not required for PD-1 agonism. We next explored whether antibody-mediated clustering was an important driver of inhibition of T cell activation; however, we found that a monovalent PD-1 antibody was not inferior to a conventional bivalent antibody in its ability to suppress T cell activation. Importantly, we found that affinity to PD-1 correlated positively with inhibition of T cell activation, with higher affinity antibodies exhibiting higher levels of inhibition. Using a series of human Fc mutants with altered affinities to various FcγRs, we dissected the contributions of FcγRs and found that multiple FcγRs rather than a single receptor contribute to agonist activity. Our work reveals an important role for FcγR binding in the activity of PD-1 antibodies, which has implications for optimizing both PD-1 agonist and antagonist antibodies.
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MESH Headings
- Humans
- Programmed Cell Death 1 Receptor/immunology
- Programmed Cell Death 1 Receptor/metabolism
- Receptors, IgG/metabolism
- Receptors, IgG/immunology
- Lymphocyte Activation/immunology
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- T-Lymphocytes/drug effects
- Autoimmunity
- Protein Binding
- Immune Checkpoint Inhibitors/pharmacology
- Immune Checkpoint Inhibitors/therapeutic use
- Antibodies, Monoclonal, Humanized/pharmacology
- Antibodies, Monoclonal, Humanized/therapeutic use
- Receptors, Antigen, T-Cell/immunology
- Receptors, Antigen, T-Cell/metabolism
- Autoimmune Diseases/immunology
- Autoimmune Diseases/drug therapy
- Autoimmune Diseases/therapy
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Affiliation(s)
- Yiqing Feng
- Biotechnology Discovery Research, Lilly Research Laboratories, Lilly Technology Center North, Indianapolis, IN, USA
| | - Gordafaried Deyanat-Yazdi
- Immunology Discovery Research, Lilly Research Laboratories, Lilly Biotechnology Center, San Diego, CA, USA
| | - Kristin Newburn
- Biotechnology Discovery Research, Lilly Research Laboratories, Lilly Technology Center North, Indianapolis, IN, USA
| | - Scott Potter
- Immunology Discovery Research, Lilly Research Laboratories, Lilly Biotechnology Center, San Diego, CA, USA
| | - Mark Wortinger
- Biotechnology Discovery Research, Lilly Research Laboratories, Lilly Corporate Center, Indianapolis, IN, USA
| | - Miriam Ramirez
- Immunology Discovery Research, Lilly Research Laboratories, Lilly Biotechnology Center, San Diego, CA, USA
| | - Stephanie M E Truhlar
- Biotechnology Discovery Research, Lilly Research Laboratories, Lilly Biotechnology Center, San Diego, CA, USA
| | - Pia P Yachi
- Immunology Discovery Research, Lilly Research Laboratories, Lilly Biotechnology Center, San Diego, CA, USA.
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13
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Bewarder M, Christofyllakis K, Petersen M, Held G, Smola S, Carbon G, Bette B, Link A, Kiefer M, Bittenbring JT, Kos IA, Lesan V, Kaddu-Mulindwa D, Thurner L, Neumann F. Cytomegalovirus-Specific T-Cell-Receptor-like Antibodies Target In Vivo-Infected Human Leukocytes Inducing Natural Killer Cell-Mediated Antibody-Dependent Cellular Cytotoxicity. Int J Mol Sci 2024; 25:12908. [PMID: 39684614 DOI: 10.3390/ijms252312908] [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: 10/19/2024] [Revised: 11/20/2024] [Accepted: 11/27/2024] [Indexed: 12/18/2024] Open
Abstract
Cytomegalovirus (CMV) reactivation after stem cell or solid organ transplantation remains a major cause of morbidity and mortality in this setting. T-cell receptor (TCR)-like antibodies bind to intracellular peptides presented in major histocompatibility complex (MHC) molecules on the cell surface and may have the potential to replace T-cell function in immunocompromised patients. Three previously selected CMV-specific, human leukocyte antigen (HLA)-restricted (HLA-A*0101, HLA-A*0201 and HLA-B*0702) Fab-antibodies (A6, C1 and C7) were produced as IgG antibodies with Fc optimization. All antibodies showed specific binding to CMV peptide-loaded tumor cell lines and primary fibroblasts expressing the corresponding MHC-I molecules, leading to specific target cell lysis after the addition of natural killer (NK) cells. When deployed in combination as an antibody pool against target cells expressing more than one matching HLA allele, cytotoxic effects were amplified accordingly. CMV-specific TCR-like antibodies were also able to mediate their cytotoxic effects through neutrophils, which is important considering the delayed recovery of NK cells after stem cell transplantation. When tested on patient blood obtained during CMV reactivation, CMV-specific antibodies were able to bind to and induce cytotoxic effects in lymphocytes. CMV-specific TCR-like antibodies may find application in patients with CMV reactivation or at risk of CMV reactivation. In contrast to previous HLA/peptide-directed therapeutic approaches, the concept of a TCR-like antibody repertoire covering more than one HLA allele would make this therapeutic format available to a much larger group of patients.
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Affiliation(s)
- Moritz Bewarder
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
| | | | - Milena Petersen
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
| | - Gerhard Held
- Internal Medicine I, Westpfalz-Klinikum Kaiserslautern, 67655 Kaiserslautern, Germany
| | - Sigrun Smola
- Institute of Virology, Saarland University Medical Center, 66421 Homburg, Germany
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research, Saarland University Campus, 66123 Saarbrucken, Germany
| | - Gabi Carbon
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
| | - Birgit Bette
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
| | - Annika Link
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
| | - Maximilian Kiefer
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
| | | | - Igor Age Kos
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
| | - Vadim Lesan
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
| | | | - Lorenz Thurner
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
| | - Frank Neumann
- Internal Medicine I, Saarland University Medical Center, 66421 Homburg, Germany
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14
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Song N, Teng Y, Shi J, Teng Z, Jin B, Qu J, Zhang L, Yu P, Zhao L, Wang J, Li A, Tong L, Jiang S, Liu Y, Yin L, Jiang X, Xu T, Cui J, Qu X, Liu Y. A novel anti-HER2 monoclonal antibody IAH0968 in HER2-positive heavily pretreated solid tumors: results from a phase Ia/Ib first-in-human, open-label, single center study. Front Immunol 2024; 15:1481326. [PMID: 39676868 PMCID: PMC11637859 DOI: 10.3389/fimmu.2024.1481326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2024] [Accepted: 10/14/2024] [Indexed: 12/17/2024] Open
Abstract
Background IAH0968 is an afucosylated anti-epidermal growth factor receptor 2 (HER2) monoclonal antibody which improved the activity of antibody-dependent cellular cytotoxicity (ADCC) and superior anti-tumor efficacy. Methods To determine the maximum tolerated dose (MTD) with dose-limiting toxicity (DLT), a single institution, phase Ia/Ib study was undertaken, using 3 + 3 design. The primary endpoints were safety, tolerability and preliminary clinical activity. Eighteen patients were evaluable for safety and fifteen patients were suitable for efficacy analysis. Dose escalations were 6 mg/kg (N = 2), 10 mg/kg (N = 7), 15 mg/kg (N = 5), and tolerable up to 20 mg/kg (N = 4). Results Only one DLT was found at dosage 10 mg/kg, and no MTD was reached. The most common Grade 3 treatment-related adverse events (TRAEs) were hypokalemia (5.6%), supraventricular tachycardia (5.6%), interval extension of QTC (5.6%), and infusion reaction (5.6%). Grade 4 TRAE was arrhythmia (5.6%). No serious TRAE or Grade 5 was reported. 22.2% of patients had a TRAE leading to dose adjustment and 16.7% of patients had a TRAE resulting in discontinuation of IAH0968. After a median follow-up of 9.7 months (range, 3.7 - 22.0), the objective response rate (ORR) was 13.3% (2/15), the disease control rate (DCR) was 53.3% (8/15), and median progression-free survival (mPFS) was 4.2 months (95% CI: 1.4 - 7.7), and the median duration of disease control (DDC) was 6.3 months (95% CI: 2.9-not reached), with 4/15 responses ongoing. Conclusions In HER2-positive heavily pretreated metastatic patients, IAH0968 demonstrated promising clinical activity with durable responses and tolerable safety profiles. Clinical trial registration ClinicalTrials.gov, identifier NCT04934514.
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MESH Headings
- Humans
- Female
- Receptor, ErbB-2/antagonists & inhibitors
- Receptor, ErbB-2/metabolism
- Middle Aged
- Aged
- Male
- Neoplasms/drug therapy
- Neoplasms/immunology
- Adult
- Maximum Tolerated Dose
- Antineoplastic Agents, Immunological/adverse effects
- Antineoplastic Agents, Immunological/therapeutic use
- Antineoplastic Agents, Immunological/administration & dosage
- Antibodies, Monoclonal, Humanized/therapeutic use
- Antibodies, Monoclonal, Humanized/adverse effects
- Antibodies, Monoclonal, Humanized/administration & dosage
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal/adverse effects
- Antibodies, Monoclonal/administration & dosage
- Treatment Outcome
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Affiliation(s)
- Na Song
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Yuee Teng
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Jing Shi
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Zan Teng
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Bo Jin
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Jinglei Qu
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Lingyun Zhang
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Ping Yu
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Lei Zhao
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Jin Wang
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Aodi Li
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Linlin Tong
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Shujie Jiang
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Yang Liu
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Liusong Yin
- Department of Clinical Medicine, SUNHO (China) BioPharmaceutical Co., Ltd, Nanjing, China
| | - Xiaoling Jiang
- Department of Clinical Medicine, SUNHO (China) BioPharmaceutical Co., Ltd, Nanjing, China
| | - Tie Xu
- Department of Clinical Medicine, SUNHO (China) BioPharmaceutical Co., Ltd, Nanjing, China
| | - Jian Cui
- Department of Clinical Medicine, Nanjing Jiening Pharmaceutical Technology Co., Ltd, Nanjing, China
| | - Xiujuan Qu
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
| | - Yunpeng Liu
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang, China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang, China
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15
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van der Horst HJ, Mutis T. Enhancing Fc-mediated effector functions of monoclonal antibodies: The example of HexaBodies. Immunol Rev 2024; 328:456-465. [PMID: 39275983 PMCID: PMC11659923 DOI: 10.1111/imr.13394] [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] [Indexed: 09/16/2024]
Abstract
Since the approval of the CD20-targeting monoclonal antibody (mAb) rituximab for the treatment of lymphoma in 1997, mAb therapy has significantly transformed cancer treatment. With over 90 FDA-approved mAbs for the treatment of various hematological and solid cancers, modern cancer treatment relies heavily on these therapies. The overwhelming success of mAbs as cancer therapeutics is attributed to their broad applicability, high safety profile, and precise targeting of cancer-associated surface antigens. Furthermore, mAbs can induce various anti-tumor cytotoxic effector mechanisms including antibody-dependent cellular cytotoxicity (ADCC), antibody-dependent cellular phagocytosis (ADCP), and complement-dependent cytotoxicity (CDC), all of which are mediated via their fragment crystallizable (Fc) domain. Over the past decades, these effector mechanisms have been substantially improved through Fc domain engineering. In this review, we will outline the different approaches to enhance Fc effector functions via Fc engineering of mAbs, with a specific emphasis on the so-called "HexaBody" technology, which is designed to enhance the hexamerization of mAbs on the target cell surface, thereby inducing greater complement activation, CDC, and receptor clustering. The review will summarize the development, preclinical, and clinical testing of several HexaBodies designed for the treatment of B-cell malignancies, as well as the potential use of the HexaBody technology beyond Fc-mediated effector functions.
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Affiliation(s)
- Hilma J. van der Horst
- Department of HematologyCancer Center Amsterdam, Amsterdam UMC, VU Medical CenterAmsterdamThe Netherlands
- Present address:
Department of Fundamental Oncology, Ludwig Institute for Cancer ResearchUniversity of LausanneEpalingesSwitzerland
| | - Tuna Mutis
- Department of HematologyCancer Center Amsterdam, Amsterdam UMC, VU Medical CenterAmsterdamThe Netherlands
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16
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Schriek AI, Falck D, Wuhrer M, Kootstra NA, van Gils MJ, de Taeye SW. Functional comparison of Fc-engineering strategies to improve anti-HIV-1 antibody effector functions. Antiviral Res 2024; 231:106015. [PMID: 39343065 DOI: 10.1016/j.antiviral.2024.106015] [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: 07/12/2024] [Revised: 09/17/2024] [Accepted: 09/25/2024] [Indexed: 10/01/2024]
Abstract
Substantial reduction of the intact proviral reservoir is essential towards HIV-1 cure. In vivo administration of broadly neutralizing antibodies (bNAbs) targeting the HIV-1 envelope glycoprotein (Env) trimer can decrease the viral reservoir, through Fc-mediated killing of infected cells. In this study, we compared three commonly used antibody engineering strategies to enhance Fc-mediated effector functions: (i) glyco-engineering, (ii) protein engineering, and (iii) subclass/hinge modifications in a panel of anti-HIV-1 antibodies. We found that antibody-dependent cellular phagocytosis (ADCP) was improved by elongating the hinge domain and switching to an IgG3 constant domain. In addition, potent NK cell activation and ADCC activity was observed for afucosylated antibodies and antibodies bearing the GASDALIE mutations. The combination of these engineering strategies further increased NK cell activation and induced antibody dependent cytotoxicity (ADCC) of infected cells at low antibody concentrations. The bNAb N6 was most effective at killing HIV-1 infected cells, likely due to its high affinity and optimal angle of approach. Overall, the findings of this study are applicable to other antibody formats, and can aid the development of effective immunotherapies and antibody-based treatments for HIV-1 cure strategies.
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Affiliation(s)
- Angela I Schriek
- Amsterdam UMC location University of Amsterdam, Department of Medical Microbiology, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious diseases, Amsterdam, the Netherlands.
| | - David Falck
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands
| | - Neeltje A Kootstra
- Amsterdam Institute for Infection and Immunity, Infectious diseases, Amsterdam, the Netherlands; Amsterdam UMC location University of Amsterdam, Department of Experimental Immunology, Amsterdam, the Netherlands
| | - Marit J van Gils
- Amsterdam UMC location University of Amsterdam, Department of Medical Microbiology, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious diseases, Amsterdam, the Netherlands
| | - Steven W de Taeye
- Amsterdam UMC location University of Amsterdam, Department of Medical Microbiology, Amsterdam, the Netherlands; Amsterdam Institute for Infection and Immunity, Infectious diseases, Amsterdam, the Netherlands.
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17
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Lefranc M, Lefranc G. Using IMGT unique numbering for IG allotypes and Fc-engineered variants of effector properties and half-life of therapeutic antibodies. Immunol Rev 2024; 328:473-506. [PMID: 39367563 PMCID: PMC11659927 DOI: 10.1111/imr.13399] [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] [Indexed: 10/06/2024]
Abstract
Therapeutic monoclonal antibodies (mAb) are usually of the IgG1, IgG2, and IgG4 classes, and their heavy chains may be modified by amino acid (aa) changes involved in antibody-dependent cellular cytotoxicity (ADCC), antibody-dependent cellular phagocytosis (ADCP), complement-dependent cytotoxicity (CDC), and/or half-life. Allotypes and Fc-engineered variants are classified using IMGT/HGNC gene nomenclature (e.g., Homo sapiens IGHG1). Allotype names follow the WHO/IMGT nomenclature. IMGT-engineered variant names use the IMGT nomenclature (e.g., Homsap G1v1), which comprises species and gene name (both abbreviated) followed by the letter v (for variant) and a number. Both allotypes and engineered variants are defined by their aa changes and positions, based on the IMGT unique numbering for C domain, identified in sequence motifs, referred to as IMGT topological motifs, as their limits and length are standardized and correspond to a structural feature (e.g., strand or loop). One hundred twenty-six variants are displayed with their type, IMGT numbering, Eu-IMGT positions, motifs before and after changes, and their property and function (effector and half-life). Three motifs characterize effector variants, CH2 1.6-3, 23-BC-41, and the FG loop, whereas three different motifs characterize half-life variants, two on CH2 13-AB-18 and 89-96 with H93, and one on CH3 the FG loop with H115.
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Affiliation(s)
- Marie‐Paule Lefranc
- IMGT®, the international ImMunoGeneTics information system® (IMGT), Laboratoire d'ImmunoGénétique Moléculaire (LIGM), Institut de Génétique Humaine (IGH), UMR 9002 Centre National de la Recherche Scientifique (CNRS)Université de Montpellier (UM)Montpellier Cedex 5France
| | - Gérard Lefranc
- IMGT®, the international ImMunoGeneTics information system® (IMGT), Laboratoire d'ImmunoGénétique Moléculaire (LIGM), Institut de Génétique Humaine (IGH), UMR 9002 Centre National de la Recherche Scientifique (CNRS)Université de Montpellier (UM)Montpellier Cedex 5France
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18
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Irvine EB, Nikolov A, Khan MZ, Peters JM, Lu R, Sixsmith J, Wallace A, van Woudenbergh E, Shin S, Karpinski W, Hsiao JC, Casadevall A, Bryson BD, Cavacini L, Grace PS, Alter G, Fortune SM. Fc-engineered antibodies promote neutrophil-dependent control of Mycobacterium tuberculosis. Nat Microbiol 2024; 9:2369-2382. [PMID: 39174703 PMCID: PMC11371646 DOI: 10.1038/s41564-024-01777-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/09/2024] [Indexed: 08/24/2024]
Abstract
Mounting evidence indicates that antibodies can contribute towards control of tuberculosis (TB). However, the underlying mechanisms of humoral immune protection and whether antibodies can be exploited in therapeutic strategies to combat TB are relatively understudied. Here we engineered the receptor-binding Fc (fragment crystallizable) region of an antibody recognizing the Mycobacterium tuberculosis (Mtb) capsule, to define antibody Fc-mediated mechanism(s) of Mtb restriction. We generated 52 Fc variants that either promote or inhibit specific antibody effector functions, rationally building antibodies with enhanced capacity to promote Mtb restriction in a human whole-blood model of infection. While there is likely no singular Fc profile that universally drives control of Mtb, here we found that several Fc-engineered antibodies drove Mtb restriction in a neutrophil-dependent manner. Single-cell RNA sequencing analysis showed that a restrictive Fc-engineered antibody promoted neutrophil survival and expression of cell-intrinsic antimicrobial programs. These data show the potential of Fc-engineered antibodies as therapeutics able to harness the protective functions of neutrophils to promote control of TB.
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Affiliation(s)
- Edward B Irvine
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Angel Nikolov
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Mehak Z Khan
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
| | - Joshua M Peters
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Richard Lu
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
| | - Jaimie Sixsmith
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Aaron Wallace
- MassBiologics of the University of Massachusetts Chan Medical School, Boston, MA, USA
| | | | - Sally Shin
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
| | | | - Jeff C Hsiao
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Arturo Casadevall
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Bryan D Bryson
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Lisa Cavacini
- MassBiologics of the University of Massachusetts Chan Medical School, Boston, MA, USA
| | - Patricia S Grace
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Galit Alter
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA.
- Division of Infectious Disease, Massachusetts General Hospital, Boston, MA, USA.
| | - Sarah M Fortune
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA.
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA, USA.
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19
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Wang LT, Idris AH, Kisalu NK, Crompton PD, Seder RA. Monoclonal antibodies to the circumsporozoite proteins as an emerging tool for malaria prevention. Nat Immunol 2024; 25:1530-1545. [PMID: 39198635 DOI: 10.1038/s41590-024-01938-2] [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: 05/06/2024] [Accepted: 07/17/2024] [Indexed: 09/01/2024]
Abstract
Despite various public health strategies, malaria caused by Plasmodium falciparum parasites remains a major global health challenge that requires development of new interventions. Extended half-life human monoclonal antibodies targeting the P. falciparum circumsporozoite protein on sporozoites, the infective form of malaria parasites, prevent malaria in rodents and humans and have been advanced into clinical development. The protective epitopes on the circumsporozoite protein targeted by monoclonal antibodies have been defined. Cryogenic electron and multiphoton microscopy have enabled mechanistic structural and functional investigations of how antibodies bind to the circumsporozoite protein and neutralize sporozoites. Moreover, innovations in bioinformatics and antibody engineering have facilitated enhancement of antibody potency and durability. Here, we summarize the latest scientific advances in understanding how monoclonal antibodies to the circumsporozoite protein prevent malaria and highlight existing clinical data and future plans for how this emerging intervention can be used alone or alongside existing antimalarial interventions to control malaria across at-risk populations.
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Affiliation(s)
- Lawrence T Wang
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
- Department of Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Azza H Idris
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
- The Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA.
| | - Neville K Kisalu
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
- PATH's Center for Vaccine Innovation and Access, Washington, DC, USA
| | - Peter D Crompton
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Robert A Seder
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
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20
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McCulloch TR, Rossi GR, Miranda-Hernandez S, Valencia-Hernandez AM, Alim L, Belle CJ, Krause A, Zacchi LF, Lam PY, Nakamura K, Kupz A, Wells TJ, Souza-Fonseca-Guimaraes F. The immune checkpoint TIGIT is upregulated on T cells during bacterial infection and is a potential target for immunotherapy. Immunol Cell Biol 2024; 102:721-733. [PMID: 38873699 DOI: 10.1111/imcb.12794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 05/25/2024] [Accepted: 05/25/2024] [Indexed: 06/15/2024]
Abstract
Antibiotic resistance is a major public health threat, and alternatives to antibiotic therapy are urgently needed. Immunotherapy, particularly the blockade of inhibitory immune checkpoints, is a leading treatment option in cancer and autoimmunity. In this study, we used a murine model of Salmonella Typhimurium infection to investigate whether immune checkpoint blockade could be applied to bacterial infection. We found that the immune checkpoint T-cell immunoglobulin and ITIM domain (TIGIT) was significantly upregulated on lymphocytes during infection, particularly on CD4+ T cells, drastically limiting their proinflammatory function. Blockade of TIGIT in vivo using monoclonal antibodies was able to enhance immunity and improve bacterial clearance. The efficacy of anti-TIGIT was dependent on the capacity of the antibody to bind to Fc (fragment crystallizable) receptors, giving important insights into the mechanism of anti-TIGIT therapy. This research suggests that targeting immune checkpoints, such as TIGIT, has the potential to enhance immune responses toward bacteria and restore antibacterial treatment options in the face of antibiotic resistance.
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Affiliation(s)
- Timothy R McCulloch
- Frazer Institute, Faculty of Medicine, The University of Queensland, Woolloongabba, QLD, Australia
| | - Gustavo R Rossi
- Frazer Institute, Faculty of Medicine, The University of Queensland, Woolloongabba, QLD, Australia
| | - Socorro Miranda-Hernandez
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia
| | | | - Louisa Alim
- Frazer Institute, Faculty of Medicine, The University of Queensland, Woolloongabba, QLD, Australia
| | - Clemence J Belle
- Frazer Institute, Faculty of Medicine, The University of Queensland, Woolloongabba, QLD, Australia
| | - Andrew Krause
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, QLD, Australia
| | - Lucia F Zacchi
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, QLD, Australia
| | - Pui Yeng Lam
- Frazer Institute, Faculty of Medicine, The University of Queensland, Woolloongabba, QLD, Australia
| | - Kyohei Nakamura
- QIMR Berghofer Medical Research Institute, Herston, QLD, Australia
| | - Andreas Kupz
- Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, QLD, Australia
| | - Timothy J Wells
- Frazer Institute, Faculty of Medicine, The University of Queensland, Woolloongabba, QLD, Australia
- Australian Infectious Diseases Research Centre, University of Queensland, Brisbane, QLD, Australia
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21
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Dias J, Fabozzi G, Fourati S, Chen X, Liu C, Ambrozak DR, Ransier A, Laboune F, Hu J, Shi W, March K, Maximova AA, Schmidt SD, Samsel J, Talana CA, Ernste K, Ko SH, Lucas ME, Radecki PE, Boswell KL, Nishimura Y, Todd JP, Martin MA, Petrovas C, Boritz EA, Doria-Rose NA, Douek DC, Sékaly RP, Lifson JD, Asokan M, Gama L, Mascola JR, Pegu A, Koup RA. Administration of anti-HIV-1 broadly neutralizing monoclonal antibodies with increased affinity to Fcγ receptors during acute SHIV AD8-EO infection. Nat Commun 2024; 15:7461. [PMID: 39198422 PMCID: PMC11358508 DOI: 10.1038/s41467-024-51848-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 08/20/2024] [Indexed: 09/01/2024] Open
Abstract
Anti-HIV-1 broadly neutralizing antibodies (bNAbs) have the dual potential of mediating virus neutralization and antiviral effector functions through their Fab and Fc domains, respectively. So far, bNAbs with enhanced Fc effector functions in vitro have only been tested in NHPs during chronic simian-HIV (SHIV) infection. Here, we investigate the effects of administering in acute SHIVAD8-EO infection either wild-type (WT) bNAbs or bNAbs carrying the S239D/I332E/A330L (DEL) mutation, which increases binding to FcγRs. Emergence of virus in plasma and lymph nodes (LNs) was delayed by bNAb treatment and occurred earlier in monkeys given DEL bNAbs than in those given WT bNAbs, consistent with faster clearance of DEL bNAbs from plasma. DEL bNAb-treated monkeys had higher levels of circulating virus-specific IFNγ single-producing CD8+ CD69+ T cells than the other groups. In LNs, WT bNAbs were evenly distributed between follicular and extrafollicular areas, but DEL bNAbs predominated in the latter. At week 8 post-challenge, LN monocytes and NK cells from DEL bNAb-treated monkeys upregulated proinflammatory signaling pathways and LN T cells downregulated TNF signaling via NF-κB. Overall, bNAbs with increased affinity to FcγRs shape innate and adaptive cellular immunity, which may be important to consider in future strategies of passive bNAb therapy.
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Affiliation(s)
- Joana Dias
- Immunology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Giulia Fabozzi
- Tissue Analysis Core, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Slim Fourati
- Pathology Advanced Translational Research Unit, Department of Pathology and Laboratory Medicine, School of Medicine, Emory University, Atlanta, GA, USA
| | - Xuejun Chen
- Virology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Cuiping Liu
- Virology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - David R Ambrozak
- Immunology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Amy Ransier
- Human Immunology Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Farida Laboune
- Human Immunology Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Jianfei Hu
- Human Immunology Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Wei Shi
- Virology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Kylie March
- Tissue Analysis Core, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Anna A Maximova
- Virology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Stephen D Schmidt
- Humoral Immunology Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Jakob Samsel
- Immunology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
- Institute for Biomedical Sciences, George Washington University, Washington, D.C., USA
| | - Chloe A Talana
- Virology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Keenan Ernste
- Virology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Sung Hee Ko
- Virus Persistence and Dynamics Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Margaret E Lucas
- Virus Persistence and Dynamics Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Pierce E Radecki
- Virus Persistence and Dynamics Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Kristin L Boswell
- Immunology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Yoshiaki Nishimura
- Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - John-Paul Todd
- Translational Research Program, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Malcolm A Martin
- Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Constantinos Petrovas
- Tissue Analysis Core, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Eli A Boritz
- Virus Persistence and Dynamics Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Nicole A Doria-Rose
- Humoral Immunology Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Daniel C Douek
- Human Immunology Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Rafick-Pierre Sékaly
- Pathology Advanced Translational Research Unit, Department of Pathology and Laboratory Medicine, School of Medicine, Emory University, Atlanta, GA, USA
| | - Jeffrey D Lifson
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Mangaiarkarasi Asokan
- Virology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Lucio Gama
- Immunology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | | | - Amarendra Pegu
- Virology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Richard A Koup
- Immunology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
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22
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Shi Y, Sun Y, Seki A, Rutz S, Koerber JT, Wang J. A real-time antibody-dependent cellular phagocytosis assay by live cell imaging. J Immunol Methods 2024; 531:113715. [PMID: 38936465 DOI: 10.1016/j.jim.2024.113715] [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: 02/27/2024] [Revised: 06/20/2024] [Accepted: 06/24/2024] [Indexed: 06/29/2024]
Abstract
Antibody-dependent cellular phagocytosis (ADCP) is a cellular process by which antibody-opsonized targets (pathogens or cells) activate the Fc receptors on the surface of phagocytes to induce phagocytosis, resulting in internalization and degradation of pathogens or target cells through phagosome acidification. Besides NK cells-mediated antibody-dependent cellular cytotoxicity (ADCC), tumor-infiltrated monocytes and macrophages can directly kill tumor cells in the presence of tumor antigen-specific antibodies through ADCP, representing another attractive strategy for cancer immunotherapy. Even though several methods have been developed to measure ADCP, an automated and high-throughput quantitative assay should offer highly desirable advantages for drug discovery. In this study we established a new ADCP assay to identify therapeutical monoclonal antibodies (mAbs) that facilitate macrophages phagocytosis of live target cells. We used Incucyte, an imaging system for live cell analysis. By labeling the live target cells with a pH sensitive dye (pHrodo), we successfully monitored the ADCP in real time. We demonstrated that our image-based assay is robust and quantitative, suitable for screening and characterization of therapeutical mAbs that directly kill target cells through ADCP. Furthermore, we found different subtypes of macrophages have distinct ADCP activities using both mouse and human primary macrophages differentiated in vitro. By studying various mAbs with mutations in their Fc regions using our assay, we showed that the variants with increased binding to Fc gamma receptors (FcγRs) have enhanced ADCP activities.
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Affiliation(s)
- Yongchang Shi
- Department of Biochemical and Cellular Pharmacology, Genentech, Inc, South San Francisco, CA 94080, USA
| | - Yonglian Sun
- Department of Antibody Engineering, Genentech, Inc, South San Francisco, CA 94080, USA
| | - Akiko Seki
- Department of Cancer Immunology, Genentech Inc, South San Francisco, CA 94080, USA
| | - Sascha Rutz
- Department of Cancer Immunology, Genentech Inc, South San Francisco, CA 94080, USA
| | - James T Koerber
- Department of Antibody Engineering, Genentech, Inc, South San Francisco, CA 94080, USA
| | - Jianyong Wang
- Department of Biochemical and Cellular Pharmacology, Genentech, Inc, South San Francisco, CA 94080, USA.
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23
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Wang S, Li Y, Mei J, Wu S, Ying G, Yi Y. Precision engineering of antibodies: A review of modification and design in the Fab region. Int J Biol Macromol 2024; 275:133730. [PMID: 38986973 DOI: 10.1016/j.ijbiomac.2024.133730] [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: 05/04/2024] [Revised: 06/27/2024] [Accepted: 07/06/2024] [Indexed: 07/12/2024]
Abstract
The binding of functional groups to antibodies is crucial for disease treatment, diagnosis, and basic scientific research. Traditionally, antibody modifications have focused on the Fc region to maintain antigen-antibody binding activity. However, such modifications may impact critical antibody functions, including immune cell surface receptor activation, cytokine release, and other immune responses. In recent years, modifications targeting the antigen-binding fragment (Fab) region have garnered increasing attention. Precise modifications of the Fab region not only maximize the retention of antigen-antibody binding capacity but also enhance numerous physicochemical properties of antibodies. This paper reviews the chemical, biological, biochemical, and computer-assisted methods for modifying the Fab region of antibodies, discussing their advantages, limitations, recent advances, and future trends.
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Affiliation(s)
- Sa Wang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Yao Li
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Jianfeng Mei
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Shujiang Wu
- Hangzhou Biotest Biotech Co., Ltd, Hangzhou 310014, China.
| | - Guoqing Ying
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Yu Yi
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China.
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24
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Beaudoin-Bussières G, Finzi A. Deciphering Fc-effector functions against SARS-CoV-2. Trends Microbiol 2024; 32:756-768. [PMID: 38365562 DOI: 10.1016/j.tim.2024.01.005] [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: 12/08/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 02/18/2024]
Abstract
Major efforts were deployed to study the antibody response against SARS-CoV-2. Antibodies neutralizing SARS-CoV-2 have been extensively studied in the context of infections, vaccinations, and breakthrough infections. Antibodies, however, are pleiotropic proteins that have many functions in addition to neutralization. These include Fc-effector functions such as antibody-dependent cellular cytotoxicity (ADCC) and antibody-dependent cellular phagocytosis (ADCP). Although important to combat viral infections, these Fc-effector functions were less studied in the context of SARS-CoV-2 compared with binding and neutralization. This is partly due to the difficulty in developing reliable assays to measure Fc-effector functions compared to antibody binding and neutralization. Multiple assays have now been developed and can be used to measure different Fc-effector functions. Here, we review these assays and what is known regarding anti-SARS-CoV-2 Fc-effector functions. Overall, this review summarizes and updates our current state of knowledge regarding anti-SARS-CoV-2 Fc-effector functions.
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Affiliation(s)
- Guillaume Beaudoin-Bussières
- Centre de recherche du CHUM, Montréal, Québec H2X 0A9, Canada; Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Québec H2X 0A9, Canada
| | - Andrés Finzi
- Centre de recherche du CHUM, Montréal, Québec H2X 0A9, Canada; Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Québec H2X 0A9, Canada.
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25
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Coënon L, Rigal E, Courot H, Multrier C, Zemiti S, Lambour J, Pugnière M, de Toledo M, Bossis G, Cartron G, Robert B, Martineau P, Fauvel B, Presumey J, Villalba M. Generation of non-genetically modified, CAR-like, NK cells. J Immunother Cancer 2024; 12:e009070. [PMID: 39029925 PMCID: PMC11261687 DOI: 10.1136/jitc-2024-009070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2024] [Indexed: 07/21/2024] Open
Abstract
BACKGROUND Natural killer (NK) cell therapy is considered an attractive and safe strategy for anticancer therapy. Nevertheless, when autologous or allogenic NK cells are used alone, the clinical benefit has been disappointing. This is partially due to the lack of target specificity. Recently, CD19-specific chimeric antigen receptor (CAR)-NK cells have proven to be safe and potent in patients with B-cell tumors. However, the generation of CAR-NK cells is a complicated manufacturing process. We aim at developing a targeted NK cell therapy without the need for cellular genetic modifications. We took advantage of the natural expression of the IgG Fc receptor CD16a (FcγRIIIa) to induce strong antigen-specific effector functions through antibody-dependent cell-mediated cytotoxicity (ADCC). We have generated the new technology "Pin", which enables the arming of modified monoclonal antibodies (mAbs) onto the CD16a of ex vivo expanded NK (eNK) cells. Methods Ex vivo eNK were prepared from umbilical cord blood cells and expanded using interleukin (IL)-2/IL-15 and Epstein-Barr virus (EBV)-transformed B-lymphoblastoid feeder cells. mAbs were engineered with four substitutions called Pin mutations to increase their affinity to CD16a. eNK were incubated with anti-CD20 or anti-CD19 Pin-mAbs to generate "armed" eNK and were used to assess effector functions in vitro on cancer cell lines, lymphoma patient cells and in vivo. RESULTS CD16a/Pin-mAb interaction is stable for several days and Pin-mAb eNK inherit the mAb specificity and exclusively induce ADCC against targets expressing the cognate antigen. Hence, Pin-mAbs confer long-term selectivity to eNK, which allows specific elimination of the target cells in several in vivo mouse models. Finally, we showed that it is possible to arm eNK with at least two Pin-mAbs simultaneously, to increase efficacy against heterogenous cancer cell populations. CONCLUSIONS The Pin technology provides an off-the-shelf NK cell therapy platform to generate CAR-like NK cells, without genetic modifications, that easily target multiple tumor antigens.
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MESH Headings
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Humans
- Animals
- Mice
- Receptors, IgG/metabolism
- Receptors, IgG/immunology
- Immunotherapy, Adoptive/methods
- Cell Line, Tumor
- Antigens, CD19/immunology
- Antibody-Dependent Cell Cytotoxicity
- Receptors, Chimeric Antigen/immunology
- Receptors, Chimeric Antigen/genetics
- Receptors, Chimeric Antigen/metabolism
- Xenograft Model Antitumor Assays
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal/pharmacology
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Affiliation(s)
- Loïs Coënon
- IRMB, INSERM U1183, University of Montpellier, CHU Montpellier, Montpellier, France
| | | | | | - Caroline Multrier
- IRMB, INSERM U1183, University of Montpellier, CHU Montpellier, Montpellier, France
| | - Sara Zemiti
- IRMB, INSERM U1183, University of Montpellier, CHU Montpellier, Montpellier, France
| | - Jennifer Lambour
- IRMB, INSERM U1183, University of Montpellier, CHU Montpellier, Montpellier, France
| | - Martine Pugnière
- IRCM, INSERM U1194, University of Montpellier, ICM, Montpellier, France
| | | | | | - Guillaume Cartron
- Department of Clinical Hematology, CHU Montpellier, Montpellier, France
| | - Bruno Robert
- IRCM, INSERM U1194, University of Montpellier, ICM, Montpellier, France
| | - Pierre Martineau
- IRCM, INSERM U1194, University of Montpellier, ICM, Montpellier, France
| | | | | | - Martin Villalba
- IRMB, INSERM U1183, University of Montpellier, CHU Montpellier, Montpellier, France
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26
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Wang Z, Kang M, Ebrahimpour A, Chen C, Ge X. Fc engineering by monoclonal mammalian cell display for improved affinity and selectivity towards FcγRs. Antib Ther 2024; 7:209-220. [PMID: 39036072 PMCID: PMC11259757 DOI: 10.1093/abt/tbae017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 05/29/2024] [Accepted: 06/20/2024] [Indexed: 07/23/2024] Open
Abstract
Fc optimization can significantly enhance therapeutic efficacy of monoclonal antibodies. However, existing Fc engineering approaches are sub-optimal with noted limitations, such as inappropriate glycosylation, polyclonal libraries, and utilizing fragment but not full-length IgG display. Applying cell cycle arrested recombinase-mediated cassette exchange, this study constructed high-quality monoclonal Fc libraries in CHO cells, displayed full-length IgG on cell surface, and preformed ratiometric fluorescence activated cell sorting (FACS) with the antigen and individual FcγRs. Identified Fc variants were quantitatively evaluated by flow cytometry, ELISA, kinetic and steady-state binding affinity measurements, and cytotoxicity assays. An error-prone Fc library focusing on the hinge-CH2 region was constructed in CHO cells with a functional diversity of 7.5 × 106. Panels of novel Fc variants with enhanced affinity and selectivity for FcγRs were isolated. Particularly, clone 2a-10 (G236E/K288R/K290W/K320M) showed increased binding strength towards FcγRIIa-131R and 131H allotypes with kinetic dissociation constants (KD-K) of 140 nM and 220 nM, respectively, while reduced binding strength towards FcγRIIb compared to WT Fc; clone 2b-1 (K222I/V302E/L328F/K334E) had KD-K of 180 nM towards FcγRIIb; clone 3a-2 (P247L/K248E/K334I) exhibited KD-K of 190 nM and 100 nM towards FcγRIIIa-176F and 176 V allotypes, respectively, and improved potency of 2.0 ng/ml in ADCC assays. Key mutation hotspots were identified, including P247 for FcγRIIIa, K290 for FcγRIIa, and K334 for FcγRIIb bindings. Discovery of Fc variants with enhanced affinity and selectivity towards individual FcγR and the identification of novel mutation hotspots provide valuable insights for further Fc optimization and serve as a foundation for advancing antibody therapeutics development.
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Affiliation(s)
- Zening Wang
- Institute of Molecular Medicine, University of Texas Health Science Center at Houston, 1825 Pressler St, Houston, TX 77030, United States
- Department of Chemical and Environmental Engineering, University of California Riverside, 900 University Ave, Reverside, CA 92521, United States
| | - Minhyo Kang
- Department of Chemical and Environmental Engineering, University of California Riverside, 900 University Ave, Reverside, CA 92521, United States
| | - Afshin Ebrahimpour
- Institute of Molecular Medicine, University of Texas Health Science Center at Houston, 1825 Pressler St, Houston, TX 77030, United States
| | - Chuan Chen
- Department of Chemical and Environmental Engineering, University of California Riverside, 900 University Ave, Reverside, CA 92521, United States
| | - Xin Ge
- Institute of Molecular Medicine, University of Texas Health Science Center at Houston, 1825 Pressler St, Houston, TX 77030, United States
- Department of Chemical and Environmental Engineering, University of California Riverside, 900 University Ave, Reverside, CA 92521, United States
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27
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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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28
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Piovesan D, de Groot AE, Cho S, Anderson AE, Ray RD, Patnaik A, Foster PG, Mitchell CG, Lopez Espinoza AY, Zhu WS, Stagnaro CE, Singh H, Zhao X, Seitz L, Walker NP, Walters MJ, Sivick KE. Fc-Silent Anti-TIGIT Antibodies Potentiate Antitumor Immunity without Depleting Regulatory T Cells. Cancer Res 2024; 84:1978-1995. [PMID: 38635895 DOI: 10.1158/0008-5472.can-23-2455] [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: 08/15/2023] [Revised: 02/02/2024] [Accepted: 04/02/2024] [Indexed: 04/20/2024]
Abstract
T-cell immunoreceptor with immunoglobulin and immunoreceptor tyrosine-based inhibitory motif domains (TIGIT) is an inhibitory receptor on immune cells that outcompetes an activating receptor, CD226, for shared ligands. Tumor-infiltrating lymphocytes express TIGIT and CD226 on regulatory T cells (Treg) and on CD8+ T cells with tumor-reactive or exhausted phenotypes, supporting the potential of therapeutically targeting TIGIT to enhance antitumor immunity. To optimize the efficacy of therapeutic antibodies against TIGIT, it is necessary to understand IgG Fc (Fcγ) receptor binding for therapeutic benefit. In this study, we showed that combining Fc-enabled (Fce) or Fc-silent (Fcs) anti-TIGIT with antiprogrammed cell death protein 1 in mice resulted in enhanced control of tumors by differential mechanisms: Fce anti-TIGIT promoted the depletion of intratumoral Treg, whereas Fcs anti-TIGIT did not. Despite leaving Treg numbers intact, Fcs anti-TIGIT potentiated the activation of tumor-specific exhausted CD8+ populations in a lymph node-dependent manner. Fce anti-TIGIT induced antibody-dependent cell-mediated cytotoxicity against human Treg in vitro, and significant decreases in Treg were measured in the peripheral blood of patients with phase I solid tumor cancer treated with Fce anti-TIGIT. In contrast, Fcs anti-TIGIT did not deplete human Treg in vitro and was associated with anecdotal objective clinical responses in two patients with phase I solid tumor cancer whose peripheral Treg frequencies remained stable on treatment. Collectively, these data provide evidence for pharmacologic activity and antitumor efficacy of anti-TIGIT antibodies lacking the ability to engage Fcγ receptor. SIGNIFICANCE Fcs-silent anti-TIGIT antibodies enhance the activation of tumor-specific pre-exhausted T cells and promote antitumor efficacy without depleting T regulatory cells.
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29
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Klenchin VA, Clark NM, Keles NK, Capuano S, Mason R, Gao G, Broman A, Kose E, Immonen TT, Fennessey CM, Keele BF, Lifson JD, Roederer M, Gardner MR, Evans DT. Adeno-associated viral delivery of Env-specific antibodies prevents SIV rebound after discontinuing antiretroviral therapy. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.30.593694. [PMID: 38895320 PMCID: PMC11185534 DOI: 10.1101/2024.05.30.593694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
An alternative to lifelong antiretroviral therapy (ART) is needed to achieve durable control of HIV-1. Here we show that adeno-associated virus (AAV)-delivery of two rhesus macaque antibodies to the SIV envelope glycoprotein (Env) with potent neutralization and antibody-dependent cellular cytotoxicity can prevent viral rebound in macaques infected with barcoded SIVmac239M after discontinuing suppressive ART. Following AAV administration, sustained antibody expression with minimal anti-drug antibody responses was achieved in all but one animal. After ART withdrawal, SIV replication rebounded within two weeks in all of the control animals but remained below the threshold of detection in plasma (<15 copies/mL) for more than a year in four of the eight animals that received AAV vectors encoding Env-specific antibodies. Viral sequences from animals with delayed rebound exhibited restricted barcode diversity and antibody escape. Thus, sustained expression of antibodies with potent antiviral activity can afford durable, ART-free containment of pathogenic SIV infection.
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Affiliation(s)
- Vadim A. Klenchin
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison; Madison, WI, 53705, USA
| | - Natasha M. Clark
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison; Madison, WI, 53705, USA
| | - Nida K. Keles
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison; Madison, WI, 53705, USA
| | - Saverio Capuano
- Wisconsin National Primate Research Center, University of Wisconsin-Madison; Madison, WI, 53715, USA
| | - Rosemarie Mason
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health; Bethesda, MD, 20892, USA
| | - Guangping Gao
- Deparment of Microbiology and Physiological Systems, University of Massachusetts Medical School; Worcester, MA, 01605, USA
| | - Aimee Broman
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison; Madison, WI, 53705, USA
| | - Emek Kose
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research; Frederick, MD, 21702, USA
| | - Taina T. Immonen
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research; Frederick, MD, 21702, USA
| | - Christine M. Fennessey
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research; Frederick, MD, 21702, USA
| | - Brandon F. Keele
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research; Frederick, MD, 21702, USA
| | - Jeffrey D. Lifson
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research; Frederick, MD, 21702, USA
| | - Mario Roederer
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health; Bethesda, MD, 20892, USA
| | - Matthew R. Gardner
- Division of Infectious Diseases, Department of Medicine, Emory University; Atlanta, GA, 30329, USA
- Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, GA, 30329, USA
| | - David T Evans
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison; Madison, WI, 53705, USA
- Wisconsin National Primate Research Center, University of Wisconsin-Madison; Madison, WI, 53715, USA
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30
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Pierre CN, Adams LE, Higgins JS, Anasti K, Goodman D, Mielke D, Stanfield-Oakley S, Powers JM, Li D, Rountree W, Wang Y, Edwards RJ, Alam SM, Ferrari G, Tomaras GD, Haynes BF, Baric RS, Saunders KO. Non-neutralizing SARS-CoV-2 N-terminal domain antibodies protect mice against severe disease using Fc-mediated effector functions. PLoS Pathog 2024; 20:e1011569. [PMID: 38900807 PMCID: PMC11218955 DOI: 10.1371/journal.ppat.1011569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 07/02/2024] [Accepted: 04/26/2024] [Indexed: 06/22/2024] Open
Abstract
Antibodies perform both neutralizing and non-neutralizing effector functions that protect against certain pathogen-induced diseases. A human antibody directed at the SARS-CoV-2 Spike N-terminal domain (NTD), DH1052, was recently shown to be non-neutralizing, yet it protected mice and cynomolgus macaques from severe disease. The mechanisms of NTD non-neutralizing antibody-mediated protection are unknown. Here we show that Fc effector functions mediate NTD non-neutralizing antibody (non-nAb) protection against SARS-CoV-2 MA10 viral challenge in mice. Though non-nAb prophylactic infusion did not suppress infectious viral titers in the lung as potently as neutralizing antibody (nAb) infusion, disease markers including gross lung discoloration were similar in nAb and non-nAb groups. Fc functional knockout substitutions abolished non-nAb protection and increased viral titers in the nAb group. Fc enhancement increased non-nAb protection relative to WT, supporting a positive association between Fc functionality and degree of protection from SARS-CoV-2 infection. For therapeutic administration of antibodies, non-nAb effector functions contributed to virus suppression and lessening of lung discoloration, but the presence of neutralization was required for optimal protection from disease. This study demonstrates that non-nAbs can utilize Fc-mediated mechanisms to lower viral load and prevent lung damage due to coronavirus infection.
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Affiliation(s)
- Camille N. Pierre
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Lily E. Adams
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Jaclyn S. Higgins
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Kara Anasti
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Derrick Goodman
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Dieter Mielke
- Department of Surgery, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Sherry Stanfield-Oakley
- Department of Surgery, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - John M. Powers
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Dapeng Li
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Wes Rountree
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Yunfei Wang
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Robert J. Edwards
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - S. Munir Alam
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Guido Ferrari
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, United States of America
| | - Georgia D. Tomaras
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, United States of America
- Department of Immunology, Duke University, Durham, North Carolina, United States of America
| | - Barton F. Haynes
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Immunology, Duke University, Durham, North Carolina, United States of America
| | - Ralph S. Baric
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Kevin O. Saunders
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, United States of America
- Department of Immunology, Duke University, Durham, North Carolina, United States of America
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31
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Maso L, Rajak E, Bang I, Koide A, Hattori T, Neel BG, Koide S. Molecular basis for antibody recognition of multiple drug-peptide/MHC complexes. Proc Natl Acad Sci U S A 2024; 121:e2319029121. [PMID: 38781214 PMCID: PMC11145297 DOI: 10.1073/pnas.2319029121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 02/14/2024] [Indexed: 05/25/2024] Open
Abstract
The HapImmuneTM platform exploits covalent inhibitors as haptens for creating major histocompatibility complex (MHC)-presented tumor-specific neoantigens by design, combining targeted therapies with immunotherapy for the treatment of drug-resistant cancers. A HapImmune antibody, R023, recognizes multiple sotorasib-conjugated KRAS(G12C) peptides presented by different human leukocyte antigens (HLAs). This high specificity to sotorasib, coupled with broad HLA-binding capability, enables such antibodies, when reformatted as T cell engagers, to potently and selectively kill sotorasib-resistant KRAS(G12C) cancer cells expressing different HLAs upon sotorasib treatment. The loosening of HLA restriction could increase the patient population that can benefit from this therapeutic approach. To understand the molecular basis for its unconventional binding capability, we used single-particle cryogenic electron microscopy to determine the structures of R023 bound to multiple sotorasib-peptide conjugates presented by different HLAs. R023 forms a pocket for sotorasib between the VH and VL domains, binds HLAs in an unconventional, angled way, with VL making most contacts with them, and makes few contacts with the peptide moieties. This binding mode enables the antibody to accommodate different hapten-peptide conjugates and to adjust its conformation to different HLAs presenting hapten-peptides. Deep mutational scanning validated the structures and revealed distinct levels of mutation tolerance by sotorasib- and HLA-binding residues. Together, our structural information and sequence landscape analysis reveal key features for achieving MHC-restricted recognition of multiple hapten-peptide antigens, which will inform the development of next-generation therapeutic antibodies.
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Affiliation(s)
- Lorenzo Maso
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY10016
| | - Epsa Rajak
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY10016
| | - Injin Bang
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY10016
| | - Akiko Koide
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY10016
- Department of Medicine, New York University School of Medicine, New York, NY10016
| | - Takamitsu Hattori
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY10016
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY10016
| | - Benjamin G. Neel
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY10016
- Department of Medicine, New York University School of Medicine, New York, NY10016
| | - Shohei Koide
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY10016
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY10016
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32
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Stefańczyk SA, Hagelstein I, Lutz MS, Müller S, Holzmayer SJ, Jarjour G, Zekri L, Heitmann JS, Salih HR, Märklin M. Induction of NK cell reactivity against acute myeloid leukemia by Fc-optimized CD276 (B7-H3) antibody. Blood Cancer J 2024; 14:67. [PMID: 38637557 PMCID: PMC11026476 DOI: 10.1038/s41408-024-01050-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 03/25/2024] [Accepted: 04/03/2024] [Indexed: 04/20/2024] Open
Abstract
Acute myeloid leukemia (AML) remains a therapeutic challenge despite recent therapeutic advances. Although monoclonal antibodies (mAbs) engaging natural killer (NK) cells via antibody-dependent cellular cytotoxicity (ADCC) hold promise in cancer therapy, almost none have received clinical approval for AML, so far. Recently, CD276 (B7-H3) has emerged as a promising target for AML immunotherapy, due to its high expression on leukemic blasts of AML patients. Here, we present the preclinical development of the Fc-optimized CD276 mAb 8H8_SDIE with enhanced CD16 affinity. We demonstrate that 8H8_SDIE specifically binds to CD276 on AML cell lines and primary AML cells and induces pronounced NK cell activation and degranulation as measured by CD69, CD25, and CD107a. Secretion of IFNγ, TNF, granzyme B, granulysin, and perforin, which mediate NK cell effector functions, was induced by 8H8_SDIE. A pronounced target cell-restricted lysis of AML cell lines and primary AML cells was observed in cytotoxicity assays using 8H8_SDIE. Finally, xenograft models with 8H8_SDIE did not cause off-target immune activation and effectively inhibited leukemia growth in vivo. We here present a novel attractive immunotherapeutic compound that potently induces anti-leukemic NK cell reactivity in vitro and in vivo as treatment option for AML.
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Affiliation(s)
- Sylwia A Stefańczyk
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Ilona Hagelstein
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Martina S Lutz
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Stefanie Müller
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Samuel J Holzmayer
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Grace Jarjour
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Latifa Zekri
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Jonas S Heitmann
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Helmut R Salih
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Melanie Märklin
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital of Tübingen, Tübingen, Germany.
- Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', Eberhard Karls University of Tübingen, Tübingen, Germany.
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33
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Li J, Zhou B, Wang S, Ouyang J, Jiang X, Wang C, Zhou T, Zheng KW, Wang J, Wang J. Development of a Human B7-H3-Specific Antibody with Activity against Colorectal Cancer Cells through a Synthetic Nanobody Library. Bioengineering (Basel) 2024; 11:381. [PMID: 38671802 PMCID: PMC11047927 DOI: 10.3390/bioengineering11040381] [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] [Received: 03/28/2024] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
Nanobodies have emerged as promising tools in biomedicine due to their single-chain structure and inherent stability. They generally have convex paratopes, which potentially prefer different epitope sites in an antigen compared to traditional antibodies. In this study, a synthetic phage display nanobody library was constructed and used to identify nanobodies targeting a tumor-associated antigen, the human B7-H3 protein. Combining next-generation sequencing and single-clone validation, two nanobodies were identified to specifically bind B7-H3 with medium nanomolar affinities. Further characterization revealed that these two clones targeted a different epitope compared to known B7-H3-specific antibodies, which have been explored in clinical trials. Furthermore, one of the clones, dubbed as A6, exhibited potent antibody-dependent cell-mediated cytotoxicity (ADCC) against a colorectal cancer cell line with an EC50 of 0.67 nM, upon conversion to an Fc-enhanced IgG format. These findings underscore a cost-effective strategy that bypasses the lengthy immunization process, offering potential rapid access to nanobodies targeting unexplored antigenic sites.
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Affiliation(s)
- Jingxian Li
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (J.L.); (B.Z.); (S.W.); (J.O.); (X.J.); (J.W.)
| | - Bingjie Zhou
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (J.L.); (B.Z.); (S.W.); (J.O.); (X.J.); (J.W.)
| | - Shiting Wang
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (J.L.); (B.Z.); (S.W.); (J.O.); (X.J.); (J.W.)
| | - Jiayi Ouyang
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (J.L.); (B.Z.); (S.W.); (J.O.); (X.J.); (J.W.)
| | - Xinyi Jiang
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (J.L.); (B.Z.); (S.W.); (J.O.); (X.J.); (J.W.)
| | - Chenglin Wang
- Shenzhen Qiyu Biotechnology Co., Ltd., Shenzhen 518107, China;
| | - Teng Zhou
- School of Cyberspace Security, Hainan University, Haikou 570228, China;
| | - Ke-wei Zheng
- School of Biomedical Sciences, Hunan University, Changsha 410082, China;
| | - Junqing Wang
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (J.L.); (B.Z.); (S.W.); (J.O.); (X.J.); (J.W.)
| | - Jiaqi Wang
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (J.L.); (B.Z.); (S.W.); (J.O.); (X.J.); (J.W.)
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Ng CL, Lim TS, Choong YS. Application of Computational Techniques in Antibody Fc-Fused Molecule Design for Therapeutics. Mol Biotechnol 2024; 66:568-581. [PMID: 37742298 DOI: 10.1007/s12033-023-00885-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 08/23/2023] [Indexed: 09/26/2023]
Abstract
Since the advent of hybridoma technology in the year 1975, it took a decade to witness the first approved monoclonal antibody Orthoclone OKT39 (muromonab-CD3) in the year 1986. Since then, continuous strides have been made to engineer antibodies for specific desired effects. The engineering efforts were not confined to only the variable domains of the antibody but also included the fragment crystallizable (Fc) region that influences the immune response and serum half-life. Engineering of the Fc fragment would have a profound effect on the therapeutic dose, antibody-dependent cell-mediated cytotoxicity as well as antibody-dependent cellular phagocytosis. The integration of computational techniques into antibody engineering designs has allowed for the generation of testable hypotheses and guided the rational antibody design framework prior to further experimental evaluations. In this article, we discuss the recent works in the Fc-fused molecule design that involves computational techniques. We also summarize the usefulness of in silico techniques to aid Fc-fused molecule design and analysis for the therapeutics application.
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Affiliation(s)
- Chong Lee Ng
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Theam Soon Lim
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Yee Siew Choong
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Minden, Penang, Malaysia.
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35
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Grandclément C, Estoppey C, Dheilly E, Panagopoulou M, Monney T, Dreyfus C, Loyau J, Labanca V, Drake A, De Angelis S, Rubod A, Frei J, Caro LN, Blein S, Martini E, Chimen M, Matthes T, Kaya Z, Edwards CM, Edwards JR, Menoret E, Kervoelen C, Pellat-Deceunynck C, Moreau P, Mbow ML, Srivastava A, Dyson MR, Zhukovsky EA, Perro M, Sammicheli S. Development of ISB 1442, a CD38 and CD47 bispecific biparatopic antibody innate cell modulator for the treatment of multiple myeloma. Nat Commun 2024; 15:2054. [PMID: 38448430 PMCID: PMC10917784 DOI: 10.1038/s41467-024-46310-y] [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: 07/31/2023] [Accepted: 02/21/2024] [Indexed: 03/08/2024] Open
Abstract
Antibody engineering can tailor the design and activities of therapeutic antibodies for better efficiency or other advantageous clinical properties. Here we report the development of ISB 1442, a fully human bispecific antibody designed to re-establish synthetic immunity in CD38+ hematological malignancies. ISB 1442 consists of two anti-CD38 arms targeting two distinct epitopes that preferentially drive binding to tumor cells and enable avidity-induced blocking of proximal CD47 receptors on the same cell while preventing on-target off-tumor binding on healthy cells. The Fc portion of ISB 1442 is engineered to enhance complement dependent cytotoxicity, antibody dependent cell cytotoxicity and antibody dependent cell phagocytosis. ISB 1442 thus represents a CD47-BsAb combining biparatopic targeting of a tumor associated antigen with engineered enhancement of antibody effector function to overcome potential resistance mechanisms that hamper treatment of myeloma with monospecific anti-CD38 antibodies. ISB 1442 is currently in a Phase I clinical trial in relapsed refractory multiple myeloma.
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Affiliation(s)
| | - C Estoppey
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - E Dheilly
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | | | - T Monney
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - C Dreyfus
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - J Loyau
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - V Labanca
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - A Drake
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - S De Angelis
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - A Rubod
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - J Frei
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - L N Caro
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - S Blein
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - E Martini
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - M Chimen
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - T Matthes
- Haematology Service, Department of Oncology and Clinical Pathology Service, Department of Diagnostics, University Hospital Geneva, 1211, Geneva, Switzerland
| | - Z Kaya
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Institute, University of Oxford, Oxford, UK
| | - C M Edwards
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Institute, University of Oxford, Oxford, UK
| | - J R Edwards
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Institute, University of Oxford, Oxford, UK
| | - E Menoret
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, Nantes, France
| | - C Kervoelen
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, Nantes, France
| | - C Pellat-Deceunynck
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, Nantes, France
- SIRIC ILIAD, Angers, Nantes, France
| | - P Moreau
- Nantes Université, Inserm, CNRS, Université d'Angers, CRCI2NA, Nantes, France
- SIRIC ILIAD, Angers, Nantes, France
- Service d'Hématologie Clinique, Unité d'Investigation Clinique, CHU, Nantes, France
| | - M L Mbow
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - A Srivastava
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - M R Dyson
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - E A Zhukovsky
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland
| | - M Perro
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland.
| | - S Sammicheli
- Ichnos Glenmark Innovation, Lausanne, CH, Switzerland.
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Zekri L, Hagelstein I, Märklin M, Klimovich B, Christie M, Lindner C, Kämereit S, Prakash N, Müller S, Stotz S, Maurer A, Greve C, Schmied B, Atar D, Rammensee HG, Jung G, Salih HR. Immunocytokines with target cell-restricted IL-15 activity for treatment of B cell malignancies. Sci Transl Med 2024; 16:eadh1988. [PMID: 38446900 DOI: 10.1126/scitranslmed.adh1988] [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: 02/16/2023] [Accepted: 02/13/2024] [Indexed: 03/08/2024]
Abstract
Despite the advances in cancer treatment achieved, for example, by the CD20 antibody rituximab, an urgent medical need remains to optimize the capacity of such antibodies to induce antibody-dependent cellular cytotoxicity (ADCC) that determines therapeutic efficacy. The cytokine IL-15 stimulates proliferation, activation, and cytolytic capacity of NK cells, but broad clinical use is prevented by short half-life, poor accumulation at the tumor site, and severe toxicity due to unspecific immune activation. We here report modified immunocytokines consisting of Fc-optimized CD19 and CD20 antibodies fused to an IL-15 moiety comprising an L45E-E46K double mutation (MIC+ format). The E46K mutation abrogated binding to IL-15Rα, thereby enabling substitution of physiological trans-presentation by target binding and thus conditional IL-15Rβγ stimulation, whereas the L45E mutation optimized IL-15Rβγ agonism and producibility. In vitro analysis of NK activation, anti-leukemia reactivity, and toxicity using autologous and allogeneic B cells confirmed target-dependent function of MIC+ constructs. Compared with Fc-optimized CD19 and CD20 antibodies, MIC+ constructs mediated superior target cell killing and NK cell proliferation. Mouse models using luciferase-expressing human NALM-6 lymphoma cells, patient acute lymphoblastic leukemia (ALL) cells, and murine EL-4 lymphoma cells transduced with human CD19/CD20 as targets and human and murine NK cells as effectors, respectively, confirmed superior and target-dependent anti-leukemic activity. In summary, MIC+ constructs combine the benefits of Fc-optimized antibodies and IL-15 cytokine activity and mediate superior NK cell immunity with potentially reduced side effects. They thus constitute a promising new immunotherapeutic approach shown here for B cell malignancies.
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Affiliation(s)
- Latifa Zekri
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
- Department of Immunology, Institute for Cell Biology, Eberhard Karls Universität Tübingen, Germany
- DKFZ Partner Site Tübingen, German Cancer Consortium (DKTK), 72076 Tübingen, Germany
| | - Ilona Hagelstein
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
| | - Melanie Märklin
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
| | - Boris Klimovich
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
| | - Mary Christie
- School of Medical Sciences, University of Sydney, 2050 NSW, Australia
| | - Cornelia Lindner
- Department of Immunology, Institute for Cell Biology, Eberhard Karls Universität Tübingen, Germany
- DKFZ Partner Site Tübingen, German Cancer Consortium (DKTK), 72076 Tübingen, Germany
| | - Sofie Kämereit
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Department of Immunology, Institute for Cell Biology, Eberhard Karls Universität Tübingen, Germany
- DKFZ Partner Site Tübingen, German Cancer Consortium (DKTK), 72076 Tübingen, Germany
| | - Nisha Prakash
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
- Department of Immunology, Institute for Cell Biology, Eberhard Karls Universität Tübingen, Germany
- DKFZ Partner Site Tübingen, German Cancer Consortium (DKTK), 72076 Tübingen, Germany
| | - Stefanie Müller
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
| | - Sophie Stotz
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
- Department for Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
| | - Andreas Maurer
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
- Department for Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
| | - Carsten Greve
- Department of Immunology, Institute for Cell Biology, Eberhard Karls Universität Tübingen, Germany
- DKFZ Partner Site Tübingen, German Cancer Consortium (DKTK), 72076 Tübingen, Germany
| | - Bastian Schmied
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
| | - Daniel Atar
- Childrens University Hospital, University Hospital Tübingen, 72076 Tübingen, Germany
| | - Hans-Georg Rammensee
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
- Department of Immunology, Institute for Cell Biology, Eberhard Karls Universität Tübingen, Germany
- DKFZ Partner Site Tübingen, German Cancer Consortium (DKTK), 72076 Tübingen, Germany
| | - Gundram Jung
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
- Department of Immunology, Institute for Cell Biology, Eberhard Karls Universität Tübingen, Germany
- DKFZ Partner Site Tübingen, German Cancer Consortium (DKTK), 72076 Tübingen, Germany
| | - Helmut R Salih
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies," University of Tübingen, 72076 Tübingen, Germany
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Stone CA, Spiller BW, Smith SA. Engineering therapeutic monoclonal antibodies. J Allergy Clin Immunol 2024; 153:539-548. [PMID: 37995859 PMCID: PMC11437839 DOI: 10.1016/j.jaci.2023.11.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 10/05/2023] [Accepted: 11/03/2023] [Indexed: 11/25/2023]
Abstract
The use of human antibodies as biologic therapeutics has revolutionized patient care throughout fields of medicine. As our understanding of the many roles antibodies play within our natural immune responses continues to advance, so will the number of therapeutic indications for which an mAb will be developed. The great breadth of function, long half-life, and modular structure allow for nearly limitless therapeutic possibilities. Human antibodies can be rationally engineered to enhance their desired immune functions and eliminate those that may result in unwanted effects. Antibody therapeutics now often start with fully human variable regions, either acquired from genetically engineered humanized mice or from the actual human B cells. These variable genes can be further engineered by widely used methods for optimization of their specificity through affinity maturation, random mutagenesis, targeted mutagenesis, and use of in silico approaches. Antibody isotype selection and deliberate mutations are also used to improve efficacy and tolerability by purposeful fine-tuning of their immune effector functions. Finally, improvements directed at binding to the neonatal Fc receptor can endow therapeutic antibodies with unbelievable extensions in their circulating half-life. The future of engineered antibody therapeutics is bright, with the global mAb market projected to exhibit compound annual growth, forecasted to reach a revenue of nearly half a trillion dollars in 2030.
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Affiliation(s)
- Cosby A Stone
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tenn
| | - Benjamin W Spiller
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, Tenn; Department of Pharmacology, Vanderbilt University, Nashville, Tenn
| | - Scott A Smith
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tenn; Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, Tenn.
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38
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Gstöttner C, Lippold S, Hook M, Yang F, Haberger M, Wuhrer M, Falck D, Schlothauer T, Domínguez-Vega E. Benchmarking glycoform-resolved affinity separation - mass spectrometry assays for studying FcγRIIIa binding. Front Immunol 2024; 15:1347871. [PMID: 38469305 PMCID: PMC10925690 DOI: 10.3389/fimmu.2024.1347871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 02/05/2024] [Indexed: 03/13/2024] Open
Abstract
The antibody- FcγRIIIa interaction triggers key immunological responses such as antibody dependent cellular cytotoxicity (ADCC), making it highly important for therapeutic mAbs. Due to the direct glycan-glycan interaction with FcγRIIIa receptor, differences in antibody glycosylation can drastically influence the binding affinity. Understanding the differential binding of mAb glycoforms is a very important, yet challenging task due to the co-existence of multiple glycoforms in a sample. Affinity liquid chromatography (AC) and affinity capillary electrophoresis (ACE) hyphenated with mass spectrometry (MS) can provide glycoform-resolved affinity profiles of proteins based on their differences in either dissociation (AC) or equilibrium (ACE) constants. To cross-validate the affinity ranking provided by these complementary novel approaches, both techniques were benchmarked using the same FcγRIIIa constructs. Both approaches were able to assess the mAb - FcγRIIIa interaction in a glycoform selective manner and showed a clear increase in binding for fully versus hemi-fucosylated mAbs. Also, other features, such as increasing affinity with elevated galactosylation or the binding affinity for high mannose glycoforms were consistent. We further applied these approaches to assess the binding towards the F158 allotype of FcγRIIIa, which was not reported before. The FcγRIIIa F158 allotype showed a very similar profile compared to the V158 receptor with the strongest increase in binding due to afucosylation and only a slight increase in binding with additional galactosylation. Both techniques showed a decrease of the binding affinity for high mannose glycoforms for FcγRIIIa F158 compared to the V158 variant. Overall, both approaches provided very comparable results in line with orthogonal methods proving the capabilities of separation-based affinity approaches to study FcγR binding of antibody glycoforms.
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Affiliation(s)
- Christoph Gstöttner
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Steffen Lippold
- Protein Analytical Chemistry, Genentech, A Member of the Roche Group, South San Francisco, CA, United States
| | - Michaela Hook
- Pharma Technical Development Penzberg, Roche Diagnostics GmbH, Penzberg, Germany
| | - Feng Yang
- Protein Analytical Chemistry, Genentech, A Member of the Roche Group, South San Francisco, CA, United States
| | - Markus Haberger
- Pharma Technical Development Penzberg, Roche Diagnostics GmbH, Penzberg, Germany
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - David Falck
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Tilman Schlothauer
- Pharma Research and Early Development, Roche Innovation Center, Munich, Germany
| | - Elena Domínguez-Vega
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
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39
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Chen X, Wong OK, Reiman L, Sherbenou DW, Post L. CD38 x ICAM-1 Bispecific Antibody Is a Novel Approach for Treating Multiple Myeloma and Lymphoma. Mol Cancer Ther 2024; 23:127-138. [PMID: 37816503 DOI: 10.1158/1535-7163.mct-23-0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 05/18/2023] [Accepted: 10/05/2023] [Indexed: 10/12/2023]
Abstract
The cluster of differentiation 38 (CD38) is a well-validated target for treating multiple myeloma. Although anti-CD38 mAbs have demonstrated outstanding initial responses in patients with multiple myeloma, nearly all patients eventually develop resistance and relapse. In addition, currently approved CD38 targeting therapies have failed to show monotherapy efficacy in lymphomas, where CD38 expression is present but at lower levels. To effectively target CD38 on tumor cells, we generated an antibody-dependent cellular cytotoxicity (ADCC) enhanced bispecific CD38 x intercellular cell adhesion molecule 1 (ICAM-1) antibody, VP301. This bispecific antibody targets unique epitopes on CD38 and ICAM-1 on tumor cells with reduced red blood cell binding compared with the benchmark CD38 antibody daratumumab. VP301 demonstrated potent ADCC and antibody-dependent cellular phagocytosis activities on a selected set of myeloma and lymphoma cell lines even those with low CD38 expression. In an ex vivo drug sensitivity assay, we observed responses to VP301 in multiple myeloma primary samples from relapsed/refractory patients. Moreover, VP301 demonstrated potent tumor inhibition activities in in vivo myeloma and lymphoma models. Interestingly, combination of VP301 with the immunomodulatory drug, lenalidomide, led to synergistic antitumor growth activity in an in vivo efficacy study. In conclusion, the CD38 x ICAM-1 bispecific antibody VP301 demonstrated promising efficacy and specificity toward CD38+ and ICAM-1+ tumor cells and represents a novel approach for treating multiple myeloma and lymphoma.
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Affiliation(s)
| | - Oi Kwan Wong
- Virtuoso Therapeutics, Inc., San Mateo, California
| | - Lauren Reiman
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Daniel W Sherbenou
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
- University of Colorado Cancer Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Leonard Post
- Virtuoso Therapeutics, Inc., San Mateo, California
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40
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Lutz MS, Wang K, Jung G, Salih H, Hagelstein I. An Fc-modified monoclonal antibody as novel treatment option for pancreatic cancer. Front Immunol 2024; 15:1343929. [PMID: 38322253 PMCID: PMC10845339 DOI: 10.3389/fimmu.2024.1343929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 01/08/2024] [Indexed: 02/08/2024] Open
Abstract
Pancreatic cancer is a highly lethal disease with limited treatment options. Hence, there is a considerable medical need for novel treatment strategies. Monoclonal antibodies (mAbs) have significantly improved cancer therapy, primarily due to their ability to stimulate antibody-dependent cellular cytotoxicity (ADCC), which plays a crucial role in their therapeutic efficacy. As a result, significant effort has been focused on improving this critical function by engineering mAbs with Fc regions that have increased affinity for the Fc receptor CD16 expressed on natural killer (NK) cells, the major cell population that mediates ADCC in humans. Here we report on the preclinical characterization of a mAb directed to the target antigen B7-H3 (CD276) containing an Fc part with the amino acid substitutions S239D/I332E to increase affinity for CD16 (B7-H3-SDIE) for the treatment of pancreatic cancer. B7-H3 (CD276) is highly expressed in many tumor entities, whereas expression on healthy tissues is more limited. Our findings confirm high expression of B7-H3 on pancreatic cancer cells. Furthermore, our study shows that B7-H3-SDIE effectively activates NK cells against pancreatic cancer cells in an antigen-dependent manner, as demonstrated by the analysis of NK cell activation, degranulation and cytokine release. The activation of NK cells resulted in significant tumor cell lysis in both short-term and long-term cytotoxicity assays. In conclusion, B7-H3-SDIE constitutes a promising agent for the treatment of pancreatic cancer.
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Affiliation(s)
- Martina S. Lutz
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tuebingen, Tuebingen, Germany
- Cluster of Excellence iFIT (EXC 2180) “Image-Guided and Functionally Instructed Tumor Therapies”, University of Tuebingen, Tuebingen, Germany
| | - Kevin Wang
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tuebingen, Tuebingen, Germany
| | - Gundram Jung
- Cluster of Excellence iFIT (EXC 2180) “Image-Guided and Functionally Instructed Tumor Therapies”, University of Tuebingen, Tuebingen, Germany
- Department of Immunology, Eberhard Karls Universität Tübingen, Tuebingen, Germany
| | - Helmut R. Salih
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tuebingen, Tuebingen, Germany
- Cluster of Excellence iFIT (EXC 2180) “Image-Guided and Functionally Instructed Tumor Therapies”, University of Tuebingen, Tuebingen, Germany
| | - Ilona Hagelstein
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tuebingen, Tuebingen, Germany
- Cluster of Excellence iFIT (EXC 2180) “Image-Guided and Functionally Instructed Tumor Therapies”, University of Tuebingen, Tuebingen, Germany
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Damelang T, Brinkhaus M, van Osch TLJ, Schuurman J, Labrijn AF, Rispens T, Vidarsson G. Impact of structural modifications of IgG antibodies on effector functions. Front Immunol 2024; 14:1304365. [PMID: 38259472 PMCID: PMC10800522 DOI: 10.3389/fimmu.2023.1304365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 12/11/2023] [Indexed: 01/24/2024] Open
Abstract
Immunoglobulin G (IgG) antibodies are a critical component of the adaptive immune system, binding to and neutralizing pathogens and other foreign substances. Recent advances in molecular antibody biology and structural protein engineering enabled the modification of IgG antibodies to enhance their therapeutic potential. This review summarizes recent progress in both natural and engineered structural modifications of IgG antibodies, including allotypic variation, glycosylation, Fc engineering, and Fc gamma receptor binding optimization. We discuss the functional consequences of these modifications to highlight their potential for therapeutical applications.
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Affiliation(s)
- Timon Damelang
- Sanquin Research, Department of Experimental Immunohematology and Landsteiner Laboratory, Amsterdam, Netherlands
- Sanquin Research, Department of Immunopathology, Amsterdam, Netherlands
- Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
- Department of Antibody Research & Technologies’, Genmab, Utrecht, Netherlands
| | - Maximilian Brinkhaus
- Sanquin Research, Department of Experimental Immunohematology and Landsteiner Laboratory, Amsterdam, Netherlands
- Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Thijs L. J. van Osch
- Sanquin Research, Department of Experimental Immunohematology and Landsteiner Laboratory, Amsterdam, Netherlands
- Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Janine Schuurman
- Department of Antibody Research & Technologies’, Genmab, Utrecht, Netherlands
| | - Aran F. Labrijn
- Department of Antibody Research & Technologies’, Genmab, Utrecht, Netherlands
| | - Theo Rispens
- Sanquin Research, Department of Immunopathology, Amsterdam, Netherlands
| | - Gestur Vidarsson
- Sanquin Research, Department of Experimental Immunohematology and Landsteiner Laboratory, Amsterdam, Netherlands
- Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
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Hale G, Davy AD, Wilkinson I. Systematic analysis of Fc mutations designed to enhance binding to Fc-gamma receptors. MAbs 2024; 16:2406539. [PMID: 39306747 PMCID: PMC11418285 DOI: 10.1080/19420862.2024.2406539] [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: 07/31/2024] [Revised: 09/03/2024] [Accepted: 09/11/2024] [Indexed: 09/25/2024] Open
Abstract
A critical attribute of therapeutic antibodies is their ability to engage with humoral or cellular effector mechanisms, and this depends on the ability of the Fc region to bind to complement (C1q) or Fc receptors. Investigators have sought to optimize these effects by engineering the Fc region to bind to a greater or lesser extent to individual receptors. Different approaches have been used in the clinic, but they have not been systematically compared. We have now produced a matched set of anti-CD20 antibodies representing a range of variants and compared their activity in cell-based assays for complement-dependent cytotoxicity, antibody-dependent cell-mediated cytotoxicity, and antibody-dependent phagocytosis using a range of individual Fc receptors. We have also compared the thermal stability of the variants by differential scanning fluorimetry (DSF). The results reveal a spectrum of activities which may be appropriate for different applications.
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43
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Heisler J, Kovner D, Izadi S, Zarzar J, Carter PJ. Modulation of the high concentration viscosity of IgG 1 antibodies using clinically validated Fc mutations. MAbs 2024; 16:2379560. [PMID: 39028186 PMCID: PMC11262234 DOI: 10.1080/19420862.2024.2379560] [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: 04/04/2024] [Accepted: 07/09/2024] [Indexed: 07/20/2024] Open
Abstract
The self-association of therapeutic antibodies can result in elevated viscosity and create problems in manufacturing and formulation, as well as limit delivery by subcutaneous injection. The high concentration viscosity of some antibodies has been reduced by variable domain mutations or by the addition of formulation excipients. In contrast, the impact of Fc mutations on antibody viscosity has been minimally explored. Here, we studied the effect of a panel of common and clinically validated Fc mutations on the viscosity of two closely related humanized IgG1, κ antibodies, omalizumab (anti-IgE) and trastuzumab (anti-HER2). Data presented here suggest that both Fab-Fab and Fab-Fc interactions contribute to the high viscosity of omalizumab, in a four-contact model of self-association. Most strikingly, the high viscosity of omalizumab (176 cP) was reduced 10.7- and 2.2-fold by Fc modifications for half-life extension (M252Y:S254T:T256E) and aglycosylation (N297G), respectively. Related single mutations (S254T and T256E) each reduced the viscosity of omalizumab by ~6-fold. An alternative half-life extension Fc mutant (M428L:N434S) had the opposite effect in increasing the viscosity of omalizumab by 1.5-fold. The low viscosity of trastuzumab (8.6 cP) was unchanged or increased by ≤ 2-fold by the different Fc variants. Molecular dynamics simulations provided mechanistic insight into the impact of Fc mutations in modulating electrostatic and hydrophobic surface properties as well as conformational stability of the Fc. This study demonstrates that high viscosity of some IgG1 antibodies can be mitigated by Fc mutations, and thereby offers an additional tool to help design future antibody therapeutics potentially suitable for subcutaneous delivery.
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Affiliation(s)
- Joel Heisler
- Department of Antibody Engineering, Genentech, Inc, South San Francisco, CA, USA
| | - Daniel Kovner
- Department of Pharmaceutical Development, Genentech, Inc, South San Francisco, CA, USA
| | - Saeed Izadi
- Department of Pharmaceutical Development, Genentech, Inc, South San Francisco, CA, USA
| | - Jonathan Zarzar
- Department of Pharmaceutical Development, Genentech, Inc, South San Francisco, CA, USA
| | - Paul J. Carter
- Department of Antibody Engineering, Genentech, Inc, South San Francisco, CA, USA
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Jenkins KA, Park M, Pederzoli-Ribeil M, Eskiocak U, Johnson P, Guzman W, McLaughlin M, Moore-Lai D, O'Toole C, Liu Z, Nicholson B, Flesch V, Qiu H, Clackson T, O'Hagan RC, Rodeck U, Karow M, O'Neil J, Williams JC. XTX101, a tumor-activated, Fc-enhanced anti-CTLA-4 monoclonal antibody, demonstrates tumor-growth inhibition and tumor-selective pharmacodynamics in mouse models of cancer. J Immunother Cancer 2023; 11:e007785. [PMID: 38164757 PMCID: PMC10729150 DOI: 10.1136/jitc-2023-007785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/09/2023] [Indexed: 01/03/2024] Open
Abstract
INTRODUCTION The clinical benefit of the anti-CTLA-4 monoclonal antibody (mAb) ipilimumab has been well established but limited by immune-related adverse events, especially when ipilimumab is used in combination with anti-PD-(L)1 mAb therapy. To overcome these limitations, we have developed XTX101, a tumor-activated, Fc-enhanced anti-CTLA-4 mAb. METHODS XTX101 consists of an anti-human CTLA-4 mAb covalently linked to masking peptides that block the complementarity-determining regions, thereby minimizing the mAb binding to CTLA-4. The masking peptides are designed to be released by proteases that are typically dysregulated within the tumor microenvironment (TME), resulting in activation of XTX101 intratumorally. Mutations within the Fc region of XTX101 were included to enhance affinity for FcγRIII, which is expected to enhance potency through antibody-dependent cellular cytotoxicity. RESULTS Biophysical, biochemical, and cell-based assays demonstrate that the function of XTX101 depends on proteolytic activation. In human CTLA-4 transgenic mice, XTX101 monotherapy demonstrated significant tumor growth inhibition (TGI) including complete responses, increased intratumoral CD8+T cells, and regulatory T cell depletion within the TME while maintaining minimal pharmacodynamic effects in the periphery. XTX101 in combination with anti-PD-1 mAb treatment resulted in significant TGI and was well tolerated in mice. XTX101 was activated in primary human tumors across a range of tumor types including melanoma, renal cell carcinoma, colon cancer and lung cancer in an ex vivo assay system. CONCLUSIONS These data demonstrate that XTX101 retains the full potency of an Fc-enhanced CTLA-4 antagonist within the TME while minimizing the activity in non-tumor tissue, supporting the further evaluation of XTX101 in clinical studies.
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Affiliation(s)
- Kurt A Jenkins
- Xilio Therapeutics, Waltham, Massachusetts, USA
- Molecular Medicine, City of Hope National Medical Center, Beckman Research Institute, Duarte, California, USA
| | - Miso Park
- Molecular Medicine, City of Hope National Medical Center, Beckman Research Institute, Duarte, California, USA
| | | | | | - Parker Johnson
- Xilio Therapeutics, Waltham, Massachusetts, USA
- Molecular Medicine, City of Hope National Medical Center, Beckman Research Institute, Duarte, California, USA
| | | | | | | | | | - Zhen Liu
- Xilio Therapeutics, Waltham, Massachusetts, USA
| | | | - Veronica Flesch
- Molecular Medicine, City of Hope National Medical Center, Beckman Research Institute, Duarte, California, USA
| | - Huawei Qiu
- Xilio Therapeutics, Waltham, Massachusetts, USA
| | | | | | - Ulrich Rodeck
- Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | | | | | - John C Williams
- Molecular Medicine, City of Hope National Medical Center, Beckman Research Institute, Duarte, California, USA
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45
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Chen C, Wang Z, Kang M, Lee KB, Ge X. High-fidelity large-diversity monoclonal mammalian cell libraries by cell cycle arrested recombinase-mediated cassette exchange. Nucleic Acids Res 2023; 51:e113. [PMID: 37941133 PMCID: PMC10711435 DOI: 10.1093/nar/gkad1001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 09/26/2023] [Accepted: 10/18/2023] [Indexed: 11/10/2023] Open
Abstract
Mammalian cells carrying defined genetic variations have shown great potentials in both fundamental research and therapeutic development. However, their full use was limited by lack of a robust method to construct large monoclonal high-quality combinatorial libraries. This study developed cell cycle arrested recombinase-mediated cassette exchange (aRMCE), able to provide monoclonality, precise genomic integration and uniform transgene expression. Via optimized nocodazole-mediated mitotic arrest, 20% target gene replacement efficiency was achieved without antibiotic selection, and the improved aRMCE efficiency was applicable to a variety of tested cell clones, transgene targets and transfection methods. As a demonstration of this versatile method, we performed directed evolution of fragment crystallizable (Fc), for which error-prone libraries of over 107 variants were constructed and displayed as IgG on surface of CHO cells. Diversities of constructed libraries were validated by deep sequencing, and panels of novel Fc mutants were identified showing improved binding towards specific Fc gamma receptors and enhanced effector functions. Due to its large cargo capacity and compatibility with different mutagenesis approaches, we expect this mammalian cell platform technology has broad applications for directed evolution, multiplex genetic assays, cell line development and stem cell engineering.
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Affiliation(s)
- Chuan Chen
- Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, CA 92521, USA
| | - Zening Wang
- Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, CA 92521, USA
- Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Minhyo Kang
- Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, CA 92521, USA
| | - Ki Baek Lee
- Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Xin Ge
- Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, CA 92521, USA
- Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
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46
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Wu H, Liu C, Yuan Q, Qiao Y, Ding Y, Duan L, Li W, Zhang M, Zhang X, Jiang Y, Lu J, Dong Z, Wang T, Liu K, Zhao J. A novel Fc-enhanced humanized monoclonal antibody targeting B7-H3 suppresses the growth of ESCC. Oncoimmunology 2023; 12:2282250. [PMID: 38126034 PMCID: PMC10732625 DOI: 10.1080/2162402x.2023.2282250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 11/07/2023] [Indexed: 12/23/2023] Open
Abstract
Esophageal squamous cell carcinoma (ESCC) is a prevalent malignant tumor of the digestive tract with a low 5-year survival rate due to the lack of effective treatment methods. Although therapeutic monoclonal antibodies (mAbs) now play an important role in cancer therapy, effective targeted mAbs are still lacking for ESCC. B7-H3 is highly expressed in a variety of tumors and has emerged as a promising therapeutic target. Several mAbs against B7-H3 have advanced to clinical trials, but their development has not yet been pursued for ESCC. Here, we developed a humanized and Fc-engineered anti-B7H3 mAb 24F-Hu-mut2 and systematically evaluated its anti-tumor activity in vitro and in vivo. The 24F-Hu-mut2 was humanized and modified in Fc fragment to obtain stronger antibody-dependent cell-mediated cytotoxicity(ADCC) activity and nanomolar affinity. Furthermore, both of ESCC cell-derived xenograft (CDX) and patient-derived xenograft (PDX) mice models indicated that 24F-Hu-mut2 displayed potent in vivo anti-tumor activity. In addition, a computational docking model showed that the mAb bound to IgC1 and IgC2 domain of B7-H3, which is closer to the cell membrane. Consistently, our ELISA results verified the binding of 24F-Hu-WT and IgC1 and IgC2. Our results indicate that 24F-Hu-mut2 has significant anti-ESCC activity both in vitro and in vivo, and this monoclonal antibody may be a promising antibody against ESCC and other B7-H3 overexpressing tumors.
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Affiliation(s)
- Huiting Wu
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Chang Liu
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Qiang Yuan
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Yan Qiao
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Yongwei Ding
- Department of Pathophysiology, Shaoxing People Hospital, Shaoxing, China
| | - Lina Duan
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Wenjing Li
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Mengjia Zhang
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Xuhua Zhang
- The Affiliated Cancer Hospital, Zhengzhou University, Zhengzhou, China
| | - Yanan Jiang
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Jing Lu
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Ziming Dong
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
| | - Tao Wang
- Telethon Kids Institute, University of Western Australia, Perth, Australia
- The College of Nursing and Health, Zhengzhou University, Zhengzhou, China
| | - Kangdong Liu
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
- State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, China
| | - Jimin Zhao
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- Henan Provincial Cooperative Innovation Center for Cancer Chemo- prevention, Zhengzhou, China
- State Key Laboratory of Esophageal Cancer Prevention and Treatment, Zhengzhou University, Zhengzhou, China
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Pabani A, Gainor JF. Facts and Hopes: Immunocytokines for Cancer Immunotherapy. Clin Cancer Res 2023; 29:3841-3849. [PMID: 37227449 DOI: 10.1158/1078-0432.ccr-22-1837] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/26/2023] [Accepted: 05/11/2023] [Indexed: 05/26/2023]
Abstract
The clinical development of cytokines as cancer therapeutics has been limited due to significant toxicities generally observed with systemic administration. This narrow therapeutic window, together with relatively modest efficacy, has made natural cytokines unattractive drug candidates. Immunocytokines represent a class of next-generation cytokines designed to overcome the challenges associated with traditional cytokines. These agents seek to improve the therapeutic index of cytokines by using antibodies as vehicles for the targeted delivery of immunomodulatory agents within the local tumor microenvironment (TME). Various molecular formats and cytokine payloads have been studied. In this review, we provide an overview of the rationale, preclinical support, and current clinical development strategies for immunocytokines.
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Affiliation(s)
- Aliyah Pabani
- Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Justin F Gainor
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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48
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Abdeldaim DT, Schindowski K. Fc-Engineered Therapeutic Antibodies: Recent Advances and Future Directions. Pharmaceutics 2023; 15:2402. [PMID: 37896162 PMCID: PMC10610324 DOI: 10.3390/pharmaceutics15102402] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
Monoclonal therapeutic antibodies have revolutionized the treatment of cancer and other diseases. Fc engineering aims to enhance the effector functions or half-life of therapeutic antibodies by modifying their Fc regions. Recent advances in the Fc engineering of modern therapeutic antibodies can be considered the next generation of antibody therapy. Various strategies are employed, including altering glycosylation patterns via glycoengineering and introducing mutations to the Fc region, thereby enhancing Fc receptor or complement interactions. Further, Fc engineering strategies enable the generation of bispecific IgG-based heterodimeric antibodies. As Fc engineering techniques continue to evolve, an expanding portfolio of Fc-engineered antibodies is advancing through clinical development, with several already approved for medical use. Despite the plethora of Fc-based mutations that have been analyzed in in vitro and in vivo models, we focus here in this review on the relevant Fc engineering strategies of approved therapeutic antibodies to finetune effector functions, to modify half-life and to stabilize asymmetric bispecific IgGs.
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Affiliation(s)
- Dalia T. Abdeldaim
- Institute of Applied Biotechnology, University of Applied Science Biberach, 88400 Biberach, Germany;
- Graduate School for Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Katharina Schindowski
- Institute of Applied Biotechnology, University of Applied Science Biberach, 88400 Biberach, Germany;
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49
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Lee W, Lee SM, Jung ST. Unlocking the Power of Complement-Dependent Cytotoxicity: Engineering Strategies for the Development of Potent Therapeutic Antibodies for Cancer Treatments. BioDrugs 2023; 37:637-648. [PMID: 37486566 DOI: 10.1007/s40259-023-00618-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2023] [Indexed: 07/25/2023]
Abstract
The complement system is a crucial part of the innate immune response, providing defense against invading pathogens and cancer cells. Recently, it has become evident that the complement system plays a significant role in anticancer activities, particularly through complement-dependent cytotoxicity (CDC), alongside antibody-dependent cell-mediated cytotoxicity (ADCC) and antibody-dependent cell-mediated phagocytosis (ADCP). With the discovery of new roles for serum complement molecules in the human immune system, various approaches are being pursued to develop CDC-enhanced antibody therapeutics. In this review, we focus on successful antibody engineering strategies for enhancing CDC, analyzing the lessons learned and the limitations of each approach. Furthermore, we outline potential pathways for the development of antibody therapeutics specifically aimed at enhancing CDC for superior therapeutic efficacy in the future.
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Affiliation(s)
- Wonju Lee
- Department of Biomedical Sciences, Graduate School of Medicine, Korea University, Seoul, 02841, Republic of Korea
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Sang Min Lee
- Department of Biomedical Sciences, Graduate School of Medicine, Korea University, Seoul, 02841, Republic of Korea
- Department of Applied Chemistry, Kookmin University, Seoul, 02707, Republic of Korea
| | - Sang Taek Jung
- Department of Biomedical Sciences, Graduate School of Medicine, Korea University, Seoul, 02841, Republic of Korea.
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea.
- Biomedical Research Center, Korea University Anam Hospital, Seoul, 02841, Republic of Korea.
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50
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Slein MD, Backes IM, Garland CR, Kelkar NS, Leib DA, Ackerman ME. Antibody effector functions are required for broad and potent protection of neonates from herpes simplex virus infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.29.555423. [PMID: 37693377 PMCID: PMC10491243 DOI: 10.1101/2023.08.29.555423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
The failure of multiple herpes simplex virus (HSV) vaccine candidates that induce neutralizing antibody responses raises the hypothesis that other activities, such as Fc domain-dependent effector functions, may be critical for protection. While neonatal HSV (nHSV) infection result in mortality and lifelong neurological morbidity in humans, it is uncommon among neonates with a seropositive birthing parent, suggesting the potential efficacy of antibody-based therapeutics to protect neonates. We therefore investigated the mechanisms of monoclonal antibody (mAb)-mediated protection in a mouse model of nHSV infection. Both neutralization and effector functions contributed to robust protection against nHSV-1. In contrast, effector functions alone were sufficient to protect against nHSV-2, exposing a functional dichotomy between virus types that is consistent with vaccine trial results. Together, these results emphasize that effector functions are crucial for optimal mAb-mediated protection, informing effective Ab and vaccine design, and demonstrating the potential of polyfunctional Abs as potent therapeutics for nHSV infections.
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Affiliation(s)
- Matthew D. Slein
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
- Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
| | - Iara M. Backes
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
- Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
| | - Callaghan R. Garland
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
| | - Natasha S. Kelkar
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
- Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
| | - David A. Leib
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
| | - Margaret E. Ackerman
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
- Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
- Lead Contact
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