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Singhal S, Rao AS, Stadanlick J, Bruns K, Sullivan NT, Bermudez A, Honig-Frand A, Krouse R, Arambepola S, Guo E, Moon EK, Georgiou G, Valerius T, Albelda SM, Eruslanov EB. Human Tumor-Associated Macrophages and Neutrophils Regulate Antitumor Antibody Efficacy through Lethal and Sublethal Trogocytosis. Cancer Res 2024; 84:1029-1047. [PMID: 38270915 PMCID: PMC10982649 DOI: 10.1158/0008-5472.can-23-2135] [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: 07/17/2023] [Revised: 11/29/2023] [Accepted: 01/23/2024] [Indexed: 01/26/2024]
Abstract
The clinical benefits of tumor-targeting antibodies (tAb) are modest in solid human tumors. The efficacy of many tAbs is dependent on Fc receptor (FcR)-expressing leukocytes that bind Fc fragments of tAb. Tumor-associated macrophages (TAM) and neutrophils (TAN) represent the majority of FcR+ effectors in solid tumors. A better understanding of the mechanisms by which TAMs and TANs regulate tAb response could help improve the efficacy of cancer treatments. Here, we found that myeloid effectors interacting with tAb-opsonized lung cancer cells used antibody-dependent trogocytosis (ADT) but not antibody-dependent phagocytosis. During this process, myeloid cells "nibbled off" tumor cell fragments containing tAb/targeted antigen (tAg) complexes. ADT was only tumoricidal when the tumor cells expressed high levels of tAg and the effectors were present at high effector-to-tumor ratios. If either of these conditions were not met, which is typical for solid tumors, ADT was sublethal. Sublethal ADT, mainly mediated by CD32hiCD64hi TAM, led to two outcomes: (i) removal of surface tAg/tAb complexes from the tumor that facilitated tumor cell escape from the tumoricidal effects of tAb; and (ii) acquisition of bystander tAgs by TAM with subsequent cross-presentation and stimulation of tumor-specific T-cell responses. CD89hiCD32loCD64lo peripheral blood neutrophils (PBN) and TAN stimulated tumor cell growth in the presence of the IgG1 anti-EGFR Ab cetuximab; however, IgA anti-EGFR Abs triggered the tumoricidal activity of PBN and negated the stimulatory effect of TAN. Overall, this study provides insights into the mechanisms by which myeloid effectors mediate tumor cell killing or resistance during tAb therapy. SIGNIFICANCE The elucidation of the conditions and mechanisms by which human FcR+ myeloid effectors mediate cancer cell resistance and killing during antibody treatment could help develop improved strategies for treating solid tumors.
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Affiliation(s)
- Sunil Singhal
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Abhishek S. Rao
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Jason Stadanlick
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Kyle Bruns
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Neil T. Sullivan
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Andres Bermudez
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Adam Honig-Frand
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ryan Krouse
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Sachinthani Arambepola
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Emily Guo
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Edmund K. Moon
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - George Georgiou
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas
| | - Thomas Valerius
- Department of Medicine II, Christian Albrechts University and University Hospital Schleswig-Holstein, Kiel, Germany
| | - Steven M. Albelda
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Evgeniy B. Eruslanov
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
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2
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Zhao Q, Huang S, Yang L, Chen T, Qiu X, Huang R, Dong L, Liu W. Biomarkers and coptis chinensis activity for rituximab-resistant diffuse large B-cell lymphoma: Combination of bioinformatics analysis, network pharmacology and molecular docking. Technol Health Care 2024:THC230738. [PMID: 38517810 DOI: 10.3233/thc-230738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2024]
Abstract
BACKGROUND Rituximab resistance is one of the great challenges in the treatment of diffuse large B-cell lymphoma (DLBCL), but relevant biomarkers and signalling pathways remain to be identified. Coptis chinensis and its active ingredients have antitumour effects; thus, the potential bioactive compounds and mechanisms through which Coptis chinensis acts against rituximab-resistant DLBCL are worth exploring. OBJECTIVE To elucidate the core genes involved in rituximab-resistant DLBCL and the potential therapeutic targets of candidate monomers of Coptis chinensis. METHODS Using the Traditional Chinese Medicine System Pharmacology Database and Analysis Platform (TCMSP), the Similarity Ensemble Approach and Swiss Target Prediction, the main ingredients and pharmacological targets of Coptis chinensis were identified through database searches. Through the overlap between the pharmacological targets of Coptis chinensis and the core targets of rituximab-resistant DLBCL, we identified the targets of Coptis chinensis against rituximab-resistant DLBCL and constructed an active compound-target interaction network. The targets and their corresponding active ingredients of Coptis chinensis against rituximab-resistant DLBCL were molecularly docked. RESULTS Berberine, quercetin, epiberberine and palmatine, the active components of Coptis chinensis, have great potential for improving rituximab-resistant DLBCL via PIK3CG. CONCLUSION This study revealed biomarkers and Coptis chinensis-associated molecular functions for rituximab-resistant DLBCL.
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Bauer-Smith H, Sudol ASL, Beers SA, Crispin M. Serum immunoglobulin and the threshold of Fc receptor-mediated immune activation. Biochim Biophys Acta Gen Subj 2023; 1867:130448. [PMID: 37652365 PMCID: PMC11032748 DOI: 10.1016/j.bbagen.2023.130448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/23/2023] [Accepted: 08/23/2023] [Indexed: 09/02/2023]
Abstract
Antibodies can mediate immune recruitment or clearance of immune complexes through the interaction of their Fc domain with cellular Fc receptors. Clustering of antibodies is a key step in generating sufficient avidity for efficacious receptor recognition. However, Fc receptors may be saturated with prevailing, endogenous serum immunoglobulin and this raises the threshold by which cellular receptors can be productively engaged. Here, we review the factors controlling serum IgG levels in both healthy and disease states, and discuss how the presence of endogenous IgG is encoded into the functional activation thresholds for low- and high-affinity Fc receptors. We discuss the circumstances where antibody engineering can help overcome these physiological limitations of therapeutic antibodies. Finally, we discuss how the pharmacological control of Fc receptor saturation by endogenous IgG is emerging as a feasible mechanism for the enhancement of antibody therapeutics.
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Affiliation(s)
- Hannah Bauer-Smith
- School of Biological Sciences, University of Southampton, Southampton SO17 1BJ, UK; Centre for Cancer Immunology, School of Cancer Sciences, University of Southampton Faculty of Medicine, Southampton SO16 6YD, UK
| | - Abigail S L Sudol
- School of Biological Sciences, University of Southampton, Southampton SO17 1BJ, UK
| | - Stephen A Beers
- Centre for Cancer Immunology, School of Cancer Sciences, University of Southampton Faculty of Medicine, Southampton SO16 6YD, UK.
| | - Max Crispin
- School of Biological Sciences, University of Southampton, Southampton SO17 1BJ, UK.
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4
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Shen J, Zhao S, Peng M, Li Y, Zhang L, Li X, Hu Y, Wu M, Xiang S, Wu X, Liu J, Zhang B, Chen Z, Lin D, Liu H, Tang W, Chen J, Sun X, Liao Q, Hide G, Zhou Z, Lun ZR, Wu Z. Macrophage-mediated trogocytosis contributes to destroying human schistosomes in a non-susceptible rodent host, Microtus fortis. Cell Discov 2023; 9:101. [PMID: 37794085 PMCID: PMC10550985 DOI: 10.1038/s41421-023-00603-6] [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: 03/23/2023] [Accepted: 09/13/2023] [Indexed: 10/06/2023] Open
Abstract
Schistosoma parasites, causing schistosomiasis, exhibit typical host specificity in host preference. Many mammals, including humans, are susceptible to infection, while the widely distributed rodent, Microtus fortis, exhibits natural anti-schistosome characteristics. The mechanisms of host susceptibility remain poorly understood. Comparison of schistosome infection in M. fortis with the infection in laboratory mice (highly sensitive to infection) offers a good model system to investigate these mechanisms and to gain an insight into host specificity. In this study, we showed that large numbers of leukocytes attach to the surface of human schistosomes in M. fortis but not in mice. Single-cell RNA-sequencing analyses revealed that macrophages might be involved in the cell adhesion, and we further demonstrated that M. fortis macrophages could be mediated to attach and kill schistosomula with dependence on Complement component 3 (C3) and Complement receptor 3 (CR3). Importantly, we provided direct evidence that M. fortis macrophages could destroy schistosomula by trogocytosis, a previously undescribed mode for killing helminths. This process was regulated by Ca2+/NFAT signaling. These findings not only elucidate a novel anti-schistosome mechanism in M. fortis but also provide a better understanding of host parasite interactions, host specificity and the potential generation of novel strategies for schistosomiasis control.
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Affiliation(s)
- Jia Shen
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China.
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China.
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China.
| | - Siyu Zhao
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Mei Peng
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Yanguo Li
- Institute of Drug Discovery Technology, School of Public Health, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - Lichao Zhang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Xiaoping Li
- Department of Hepatic Surgery and Liver Transplantation Center, Organ Transplantation Institute, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Yunyi Hu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Mingrou Wu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Suoyu Xiang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Xiaoying Wu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jiahua Liu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Beibei Zhang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Zebin Chen
- Department of Hepatic Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Datao Lin
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Huanyao Liu
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Wenyan Tang
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jun Chen
- Department of Immunology, Center for Precision Medicine and Engineering & Technology Research Center for Disease-Model Animals, Laboratory Animal Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Xi Sun
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China
| | - Qi Liao
- Institute of Drug Discovery Technology, School of Public Health, School of Medicine, Ningbo University, Ningbo, Zhejiang, China
| | - Geoff Hide
- Biomedical Research and Innovation Centre, School of Science, Engineering and Environment, University of Salford, Salford, UK
| | - Zhijun Zhou
- Department of Laboratory Animals, Hunan Key Laboratory of Animal Models for Human Diseases, Central South University, Changsha, Hunan, China.
| | - Zhao-Rong Lun
- Biomedical Research and Innovation Centre, School of Science, Engineering and Environment, University of Salford, Salford, UK.
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou, Guangdong, China.
| | - Zhongdao Wu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, China.
- Key Laboratory of Tropical Disease Control of the Ministry of Education, Sun Yat-sen University, Guangzhou, Guangdong, China.
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong, China.
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5
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Roeser A, Lazarus AH, Mahévas M. B cells and antibodies in refractory immune thrombocytopenia. Br J Haematol 2023; 203:43-53. [PMID: 37002711 DOI: 10.1111/bjh.18773] [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: 02/16/2023] [Accepted: 03/11/2023] [Indexed: 04/03/2023]
Abstract
Immune thrombocytopenia (ITP) is an acquired bleeding disorder mediated by pathogenic autoantibodies secreted by plasma cells (PCs) in many patients. In refractory ITP patients, the persistence of splenic and bone marrow autoreactive long-lived PCs (LLPCs) may explain primary failure of rituximab and splenectomy respectively. The reactivation of autoreactive memory B cells generating new autoreactive PCs contributes to relapses after initial response to rituximab. Emerging strategies targeting B cells and PCs aim to prevent the settlement of splenic LLPCs with the combination of anti-BAFF and rituximab, to deplete autoreactive PCs with anti-CD38 antibodies, and to induce deeper B-cell depletion in tissues with novel anti-CD20 monoclonal antibodies and anti-CD19 therapies. Alternative strategies, focused on controlling autoantibody mediated effects, have also been developed, including SYK and BTK inhibitors, complement inhibitors, FcRn blockers and inhibitors of platelet desialylation.
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Affiliation(s)
- Anaïs Roeser
- Institut Necker Enfants Malades (INEM), INSERM U1151/CNRS UMS 8253, ATIP-Avenir TeamAI2B, Paris, France
- Service de Médecine Interne, Centre Hospitalier Universitaire Henri-Mondor, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris-Est Créteil (UPEC), Créteil, France
| | - Alan H Lazarus
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Unity Health Toronto, Toronto, Ontario, Canada
- Departments of Medicine and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
- Innovation and Portfolio Management, Canadian Blood Services, Ottawa, Ontario, Canada
| | - Matthieu Mahévas
- Institut Necker Enfants Malades (INEM), INSERM U1151/CNRS UMS 8253, ATIP-Avenir TeamAI2B, Paris, France
- Service de Médecine Interne, Centre Hospitalier Universitaire Henri-Mondor, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris-Est Créteil (UPEC), Créteil, France
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6
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Taylor RP, Lindorfer MA. Measurement of Trogocytosis: Quantitative Analyses Validated with Rigorous Controls. Curr Protoc 2023; 3:e897. [PMID: 37830752 DOI: 10.1002/cpz1.897] [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: 10/14/2023]
Abstract
Trogocytosis is a process in which receptors on acceptor cells remove and internalize cognate ligands from donor cells. Trogocytosis has a profound and negative impact on mAb-based cancer immunotherapy, as seen in the treatment of chronic lymphocytic leukemia (CLL) with CD20 mAbs, such as rituximab (RTX) and ofatumumab (OFA). Our clinical observations of RTX/OFA-mediated loss of the CD20 target from circulating CLL cells have been replicated in our in vitro studies. Here we describe flow cytometry and fluorescence microscopy experiments, which demonstrate that acceptor cells, such as monocytes/macrophages that express FcγR, remove and internalize both antigen and donor cell-bound cognate IgG mAbs for several different mAb-donor cell pairs. Fluorescent mAbs and portions of the plasma cell membrane are transferred from donor cells to acceptor cells, which include the THP-1 monocytic cell line as well as freshly isolated monocytes. We describe rigorous controls to validate the reactions and eliminate dissociation or internalization as alternative mechanisms. Trogocytosis is likely to contribute to neutropenia, thrombocytopenia, and liver damage associated with use of antibody-drug conjugates. The methods we have described should allow for examination of strategies focused on blocking trogocytosis and its adverse effects. © 2023 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: Trogocytosis of mAb-opsonized donor cells mediated by adherent THP-1 cells Alternate Protocol: Application of fluorescence microscopy to examine THP-1 cell-mediated trogocytosis Support Protocol 1: Alexa labeling of mAbs and determination of F/P ratios Support Protocol 2: Standard washing procedure Support Protocol 3: Labeling and opsonization of cells Basic Protocol 2: Trogocytosis mediated by human monocytes as acceptor cells Support Protocol 4: Isolation of human monocytes Basic Protocol 3: Trogocytosis mediated by THP-1 cells in solution Support Protocol 5: Retinoic acid treatment of THP-1 cells Support Protocol 6: Culturing of SCC-25, BT-474, MOLT-4 and THP-1 cell lines.
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Affiliation(s)
- Ronald P Taylor
- Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Margaret A Lindorfer
- Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, Virginia
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7
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Schoenfeld K, Harwardt J, Habermann J, Elter A, Kolmar H. Conditional activation of an anti-IgM antibody-drug conjugate for precise B cell lymphoma targeting. Front Immunol 2023; 14:1258700. [PMID: 37841262 PMCID: PMC10569071 DOI: 10.3389/fimmu.2023.1258700] [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: 07/14/2023] [Accepted: 09/07/2023] [Indexed: 10/17/2023] Open
Abstract
Cancerous B cells are almost indistinguishable from their non-malignant counterparts regarding their surface antigen expression. Accordingly, the challenge to be faced consists in elimination of the malignant B cell population while maintaining a functional adaptive immune system. Here, we present an IgM-specific antibody-drug conjugate masked by fusion of the epitope-bearing IgM constant domain. Antibody masking impaired interaction with soluble pentameric as well as cell surface-expressed IgM molecules rendering the antibody cytotoxically inactive. Binding capacity of the anti-IgM antibody drug conjugate was restored upon conditional protease-mediated demasking which consequently enabled target-dependent antibody internalization and subsequent induction of apoptosis in malignant B cells. This easily adaptable approach potentially provides a novel mechanism of clonal B cell lymphoma eradication to the arsenal available for non-Hodgkin's lymphoma treatment.
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Affiliation(s)
- Katrin Schoenfeld
- Institute for Organic Chemistry and Biochemistry, Technical University of Darmstadt, Darmstadt, Germany
| | - Julia Harwardt
- Institute for Organic Chemistry and Biochemistry, Technical University of Darmstadt, Darmstadt, Germany
| | - Jan Habermann
- Institute for Organic Chemistry and Biochemistry, Technical University of Darmstadt, Darmstadt, Germany
| | - Adrian Elter
- Institute for Organic Chemistry and Biochemistry, Technical University of Darmstadt, Darmstadt, Germany
| | - Harald Kolmar
- Institute for Organic Chemistry and Biochemistry, Technical University of Darmstadt, Darmstadt, Germany
- Centre for Synthetic Biology, Technical University of Darmstadt, Darmstadt, Germany
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8
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Small GW, Akhtari FS, Green AJ, Havener TM, Sikes M, Quintanhila J, Gonzalez RD, Reif DM, Motsinger-Reif AA, McLeod HL, Wiltshire T. Pharmacogenomic Analyses Implicate B Cell Developmental Status and MKL1 as Determinants of Sensitivity toward Anti-CD20 Monoclonal Antibody Therapy. Cells 2023; 12:1574. [PMID: 37371044 DOI: 10.3390/cells12121574] [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: 04/03/2023] [Revised: 06/02/2023] [Accepted: 06/04/2023] [Indexed: 06/29/2023] Open
Abstract
Monoclonal antibody (mAb) therapy directed against CD20 is an important tool in the treatment of B cell disorders. However, variable patient response and acquired resistance remain important clinical challenges. To identify genetic factors that may influence sensitivity to treatment, the cytotoxic activity of three CD20 mAbs: rituximab; ofatumumab; and obinutuzumab, were screened in high-throughput assays using 680 ethnically diverse lymphoblastoid cell lines (LCLs) followed by a pharmacogenomic assessment. GWAS analysis identified several novel gene candidates. The most significant SNP, rs58600101, in the gene MKL1 displayed ethnic stratification, with the variant being significantly more prevalent in the African cohort and resulting in reduced transcript levels as measured by qPCR. Functional validation of MKL1 by shRNA-mediated knockdown of MKL1 resulted in a more resistant phenotype. Gene expression analysis identified the developmentally associated TGFB1I1 as the most significant gene associated with sensitivity. qPCR among a panel of sensitive and resistant LCLs revealed immunoglobulin class-switching as well as differences in the expression of B cell activation markers. Flow cytometry showed heterogeneity within some cell lines relative to surface Ig isotype with a shift to more IgG+ cells among the resistant lines. Pretreatment with prednisolone could partly reverse the resistant phenotype. Results suggest that the efficacy of anti-CD20 mAb therapy may be influenced by B cell developmental status as well as polymorphism in the MKL1 gene. A clinical benefit may be achieved by pretreatment with corticosteroids such as prednisolone followed by mAb therapy.
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Affiliation(s)
- George W Small
- Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Farida S Akhtari
- Biostatistics and Computational Biology Branch, Division of Intramural Research, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | - Adrian J Green
- Department of Biological Sciences, Bioinformatics Research Center, North Carolina State University, Raleigh, NC 27695, USA
| | - Tammy M Havener
- Structural Genomics Consortium and Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Michael Sikes
- Department of Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | | | - Ricardo D Gonzalez
- Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - David M Reif
- Predictive Toxicology Branch, Division of Translational Toxicology, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | - Alison A Motsinger-Reif
- Biostatistics and Computational Biology Branch, Division of Intramural Research, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | - Howard L McLeod
- Center for Precision Medicine and Functional Genomics, Utah Tech University, 225 South University Ave, St. George, UT 84770, USA
| | - Tim Wiltshire
- Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Center for Pharmacogenomics and Individualized Therapy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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9
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Blockade of CD47 enhances the antitumor effect of macrophages in renal cell carcinoma through trogocytosis. Sci Rep 2022; 12:12546. [PMID: 35869130 PMCID: PMC9307775 DOI: 10.1038/s41598-022-16766-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 07/14/2022] [Indexed: 11/15/2022] Open
Abstract
Immune checkpoint inhibitors and vascular endothelial growth factor receptor tyrosine kinase inhibitors (VEGFR TKIs) are mainstream treatments for renal cell carcinoma (RCC). Both T cells and macrophages infiltrate the tumor microenvironment of RCC. CD47, an immune checkpoint of macrophages, transmits the “don’t eat me” signal to macrophages. We propose a novel therapeutic strategy that activates the antitumor effect of macrophages. We found that CD47 was expressed in patients with RCC, and high CD47 expression was indicative of worse overall survival in datasets from The Cancer Genome Atlas. We observed that CD47-blocking antibodies enhanced the antitumor effect of macrophages against human RCC cell lines. Trogocytosis, rather than phagocytosis, occurred and was promoted by increased cell-to-cell contact between macrophages and RCC cells. Trogocytosis induced by CD47 blockade occurred in the presence of CD11b integrin signaling in macrophages and was augmented when RCC cells were exposed to VEGFR TKIs, except for sunitinib. In conclusion, this study presents evidence that anti-CD47 blocking antibodies improve the antitumor effect of macrophages in RCC. In combination with VEGFR TKIs, CD47 blockade is a potential therapeutic strategy for patients with RCC.
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10
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Behrens LM, van Egmond M, van den Berg TK. Neutrophils as immune effector cells in antibody therapy in cancer. Immunol Rev 2022; 314:280-301. [PMID: 36331258 DOI: 10.1111/imr.13159] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Tumor-targeting monoclonal antibodies are available for a number of cancer cell types (over)expressing the corresponding tumor antigens. Such antibodies can limit tumor progression by different mechanisms, including direct growth inhibition and immune-mediated mechanisms, in particular complement-dependent cytotoxicity, antibody-dependent cellular phagocytosis, and antibody-dependent cellular cytotoxicity (ADCC). ADCC can be mediated by various types of immune cells, including neutrophils, the most abundant leukocyte in circulation. Neutrophils express a number of Fc receptors, including Fcγ- and Fcα-receptors, and can therefore kill tumor cells opsonized with either IgG or IgA antibodies. In recent years, important insights have been obtained with respect to the mechanism(s) by which neutrophils engage and kill antibody-opsonized cancer cells and these findings are reviewed here. In addition, we consider a number of additional ways in which neutrophils may affect cancer progression, in particular by regulating adaptive anti-cancer immunity.
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Affiliation(s)
- Leonie M. Behrens
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Vrije Universiteit Amsterdam HV Amsterdam The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology HV Amsterdam The Netherlands
- Amsterdam institute for Infection and Immunity, Cancer Immunology HV Amsterdam The Netherlands
| | - Marjolein van Egmond
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Vrije Universiteit Amsterdam HV Amsterdam The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology HV Amsterdam The Netherlands
- Amsterdam institute for Infection and Immunity, Cancer Immunology HV Amsterdam The Netherlands
- Department of Surgery, Amsterdam UMC Vrije Universiteit Amsterdam HV Amsterdam The Netherlands
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11
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Mattei F, Andreone S, Spadaro F, Noto F, Tinari A, Falchi M, Piconese S, Afferni C, Schiavoni G. Trogocytosis in innate immunity to cancer is an intimate relationship with unexpected outcomes. iScience 2022; 25:105110. [PMID: 36185368 PMCID: PMC9515589 DOI: 10.1016/j.isci.2022.105110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 08/04/2022] [Accepted: 09/07/2022] [Indexed: 11/29/2022] Open
Abstract
Trogocytosis is a cellular process whereby a cell acquires a membrane fragment from a donor cell in a contact-dependent manner allowing for the transfer of surface proteins with functional integrity. It is involved in various biological processes, including cell-cell communication, immune regulation, and response to pathogens and cancer cells, with poorly defined molecular mechanisms. With the exception of eosinophils, trogocytosis has been reported in most immune cells and plays diverse roles in the modulation of anti-tumor immune responses. Here, we report that eosinophils acquire membrane fragments from tumor cells early after contact through the CD11b/CD18 integrin complex. We discuss the impact of trogocytosis in innate immune cells on cancer progression in the context of the evidence that eosinophils can engage in trogocytosis with tumor cells. We also discuss shared and cell-specific mechanisms underlying this process based on in silico modeling and provide a hypothetical molecular model for the stabilization of the immunological synapse operating in granulocytes and possibly other innate immune cells that enables trogocytosis. Trogocytosis in innate immune cells can regulate immune responses to cancer Eosinophils engage in trogocytosis with tumor cells via CD11b/CD18 integrin complex CD11b/CD18 integrin, focal adhesion molecules and actin network enable trogocytosis
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Affiliation(s)
- Fabrizio Mattei
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Sara Andreone
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Francesca Spadaro
- Core Facilities, Microscopy Unit, Istituto Superiore di Sanità, Rome, Italy
| | - Francesco Noto
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Antonella Tinari
- Center for Gender Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Mario Falchi
- National HIV/AIDS Research Center (CNAIDS), Istituto Superiore di Sanità, Rome, Italy
| | - Silvia Piconese
- Department of Internal Clinical Sciences, Anesthesiology and Cardiovascular Sciences, Sapienza University of Rome, Italy
- Neuroimmunology Unit, IRCCS Fondazione Santa Lucia, Rome, Italy
- Laboratory Affiliated to Istituto Pasteur Italia – Fondazione Cenci Bolognetti, Rome, Italy
| | - Claudia Afferni
- National Center for Drug Research and Evaluation, Istituto Superiore di Sanità, Rome, Italy
| | - Giovanna Schiavoni
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
- Corresponding author
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12
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Davies A, Kater AP, Sharman JP, Stilgenbauer S, Vitolo U, Klein C, Parreira J, Salles G. Obinutuzumab in the treatment of B-cell malignancies: a comprehensive review. Future Oncol 2022; 18:2943-2966. [PMID: 35856239 DOI: 10.2217/fon-2022-0112] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The type II anti-CD20 antibody obinutuzumab has structural and mechanistic features that distinguish it from the first anti-CD20 antibody, rituximab, which have translated into improved efficacy in phase III trials in indolent non-Hodgkin lymphoma and chronic lymphocytic leukemia (CLL). These gains have been shown through improvements in, and/or increased durability of, tumor response, and increases in progression-free survival in patients with CLL or follicular lymphoma (FL). Ongoing research is focusing on the use of biomarkers and the development of chemotherapy-free regimens involving obinutuzumab. phase II trials of such treatment regimens have shown promise for CLL, FL and mantle cell lymphoma, while phase III trials have highlighted obinutuzumab as the antibody partner of choice for novel agents in first-line CLL treatment.
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Affiliation(s)
- Andrew Davies
- Cancer Research UK Centre, University of Southampton, Southampton, UK
| | - Arnon P Kater
- Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Jeff P Sharman
- Willamette Valley Cancer Institute & Research Center & US Oncology, Eugene, OR 97401, USA
| | - Stephan Stilgenbauer
- Comprehensive Cancer Center Ulm, Early Clinical Trials Unit (ECTU), Ulm, & Division of CLL, Department of Internal Medicine III, Ulm University, Ulm, Germany
| | - Umberto Vitolo
- Medical Oncology, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
| | | | | | - Gilles Salles
- Memorial Sloan Kettering Cancer Center, Department of Medicine, NY 10021, USA
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13
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Lindorfer MA, Taylor RP. FcγR-Mediated Trogocytosis 2.0: Revisiting History Gives Rise to a Unifying Hypothesis. Antibodies (Basel) 2022; 11:antib11030045. [PMID: 35892705 PMCID: PMC9326535 DOI: 10.3390/antib11030045] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/24/2022] [Accepted: 06/29/2022] [Indexed: 12/25/2022] Open
Abstract
There is increasing interest in the clinical implications and immunology of trogocytosis, a process in which the receptors on acceptor cells remove and internalize cognate ligands from donor cells. We have reported that this phenomenon occurs in cancer immunotherapy, in which cells that express FcγR remove and internalize CD20 and bound mAbs from malignant B cells. This process can be generalized to include other reactions including the immune adherence phenomenon and antibody-induced immunosuppression. We discuss in detail FcγR-mediated trogocytosis and the evidence supporting a proposed predominant role for liver sinusoidal endothelial cells via the action of the inhibitory receptor FcγRIIb2. We describe experiments to test the validity of this hypothesis. The elucidation of the details of FcγR-mediated trogocytosis has the potential to allow for the development of novel therapies that can potentially block or enhance this reaction, depending upon whether the process leads to unfavorable or positive biological effects.
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14
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Zhao S, Zhang L, Xiang S, Hu Y, Wu Z, Shen J. Gnawing Between Cells and Cells in the Immune System: Friend or Foe? A Review of Trogocytosis. Front Immunol 2022; 13:791006. [PMID: 35185886 PMCID: PMC8850298 DOI: 10.3389/fimmu.2022.791006] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 01/14/2022] [Indexed: 12/27/2022] Open
Abstract
Trogocytosis occurs when one cell contacts and quickly nibbles another cell and is characterized by contact between living cells and rapid transfer of membrane fragments with functional integrity. Many immune cells are involved in this process, such as T cells, B cells, NK cells, APCs. The transferred membrane molecules including MHC molecules, costimulatory molecules, receptors, antigens, etc. An increasing number of studies have shown that trogocytosis plays an important role in the immune system and the occurrence of relevant diseases. Thus, whether trogocytosis is a friend or foe of the immune system is puzzling, and the precise mechanism underlying it has not yet been fully elucidated. Here, we provide an integrated view of the acquired findings on the connections between trogocytosis and the immune system.
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Affiliation(s)
- Siyu Zhao
- Department of Parasitology of Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Disease Control (SYSU), Ministry of Education, Guangzhou, China.,Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, China
| | - Lichao Zhang
- Department of Parasitology of Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Disease Control (SYSU), Ministry of Education, Guangzhou, China.,Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, China
| | - Suoyu Xiang
- Department of Parasitology of Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Disease Control (SYSU), Ministry of Education, Guangzhou, China.,Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, China
| | - Yunyi Hu
- Department of Parasitology of Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Disease Control (SYSU), Ministry of Education, Guangzhou, China.,Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, China
| | - Zhongdao Wu
- Department of Parasitology of Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Disease Control (SYSU), Ministry of Education, Guangzhou, China.,Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, China
| | - Jia Shen
- Department of Parasitology of Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Disease Control (SYSU), Ministry of Education, Guangzhou, China.,Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, China
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15
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Kusowska A, Kubacz M, Krawczyk M, Slusarczyk A, Winiarska M, Bobrowicz M. Molecular Aspects of Resistance to Immunotherapies-Advances in Understanding and Management of Diffuse Large B-Cell Lymphoma. Int J Mol Sci 2022; 23:ijms23031501. [PMID: 35163421 PMCID: PMC8835809 DOI: 10.3390/ijms23031501] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/22/2022] [Accepted: 01/26/2022] [Indexed: 12/28/2022] Open
Abstract
Despite the unquestionable success achieved by rituximab-based regimens in the management of diffuse large B-cell lymphoma (DLBCL), the high incidence of relapsed/refractory disease still remains a challenge. The widespread clinical use of chemo-immunotherapy demonstrated that it invariably leads to the induction of resistance; however, the molecular mechanisms underlying this phenomenon remain unclear. Rituximab-mediated therapeutic effect primarily relies on complement-dependent cytotoxicity and antibody-dependent cell cytotoxicity, and their outcome is often compromised following the development of resistance. Factors involved include inherent genetic characteristics and rituximab-induced changes in effectors cells, the role of ligand/receptor interactions between target and effector cells, and the tumor microenvironment. This review focuses on summarizing the emerging advances in the understanding of the molecular basis responsible for the resistance induced by various forms of immunotherapy used in DLBCL. We outline available models of resistance and delineate solutions that may improve the efficacy of standard therapeutic protocols, which might be essential for the rational design of novel therapeutic regimens.
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Affiliation(s)
- Aleksandra Kusowska
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.); (M.K.); (M.K.); (A.S.); (M.W.)
- Doctoral School, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Matylda Kubacz
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.); (M.K.); (M.K.); (A.S.); (M.W.)
| | - Marta Krawczyk
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.); (M.K.); (M.K.); (A.S.); (M.W.)
- Laboratory of Immunology, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
- Doctoral School of Translational Medicine, Centre of Postgraduate Medical Education, 01-813 Warsaw, Poland
| | - Aleksander Slusarczyk
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.); (M.K.); (M.K.); (A.S.); (M.W.)
- Department of General, Oncological and Functional Urology, Medical University of Warsaw, 02-005 Warsaw, Poland
| | - Magdalena Winiarska
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.); (M.K.); (M.K.); (A.S.); (M.W.)
- Laboratory of Immunology, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Malgorzata Bobrowicz
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.); (M.K.); (M.K.); (A.S.); (M.W.)
- Correspondence:
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16
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Moreno-Vicente J, Willoughby JE, Taylor MC, Booth SG, English VL, Williams EL, Penfold CA, Mockridge CI, Inzhelevskaya T, Kim J, Chan HTC, Cragg MS, Gray JC, Beers SA. Fc-null anti-PD-1 monoclonal antibodies deliver optimal checkpoint blockade in diverse immune environments. J Immunother Cancer 2022; 10:e003735. [PMID: 35017153 PMCID: PMC8753441 DOI: 10.1136/jitc-2021-003735] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Despite extensive clinical use, the mechanisms that lead to therapeutic resistance to anti-programmed cell-death (PD)-1 monoclonal antibodies (mAbs) remain elusive. Here, we sought to determine how interactions between the Fc region of anti-PD-1 mAbs and Fcγ receptors (FcγRs) affect therapeutic activity and how these are impacted by the immune environment. METHODS Mouse and human anti-PD-1 mAbs with different Fc binding profiles were generated and characterized in vitro. The ability of these mAbs to elicit T-cell responses in vivo was first assessed in a vaccination setting using the model antigen ovalbumin. The antitumor activity of anti-PD-1 mAbs was investigated in the context of immune 'hot' MC38 versus 'cold' neuroblastoma tumor models, and flow cytometry performed to assess immune infiltration. RESULTS Engagement of activating FcγRs by anti-PD-1 mAbs led to depletion of activated CD8 T cells in vitro and in vivo, abrogating therapeutic activity. Importantly, the extent of this Fc-mediated modulation was determined by the surrounding immune environment. Low FcγR-engaging mouse anti-PD-1 isotypes, which are frequently used as surrogates for human mAbs, were unable to expand ovalbumin-reactive CD8 T cells, in contrast to Fc-null mAbs. These results were recapitulated in mice expressing human FcγRs, in which clinically relevant hIgG4 anti-PD-1 led to reduced endogenous expansion of CD8 T cells compared with its engineered Fc-null counterpart. In the context of an immunologically 'hot' tumor however, both low-engaging and Fc-null mAbs induced long-term antitumor immunity in MC38-bearing mice. Finally, a similar anti-PD-1 isotype hierarchy was demonstrated in the less responsive 'cold' 9464D neuroblastoma model, where the most effective mAbs were able to delay tumor growth but could not induce long-term protection. CONCLUSIONS Our data collectively support a critical role for Fc:FcγR interactions in inhibiting immune responses to both mouse and human anti-PD-1 mAbs, and highlight the context-dependent effect that anti-PD-1 mAb isotypes can have on T-cell responses. We propose that engineering of Fc-null anti-PD-1 mAbs would prevent FcγR-mediated resistance in vivo and allow maximal T-cell stimulation independent of the immunological environment.
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Affiliation(s)
- Julia Moreno-Vicente
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Jane E Willoughby
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Martin C Taylor
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Steven G Booth
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Vikki L English
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Emily L Williams
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Christine A Penfold
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - C Ian Mockridge
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Tatyana Inzhelevskaya
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Jinny Kim
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - H T Claude Chan
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Mark S Cragg
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Juliet C Gray
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
| | - Stephen A Beers
- Antibody and Vaccine Group, Centre for Cancer Immunology, Cancer Sciences, University of Southampton, Southampton, UK
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17
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The Multiple Roles of Trogocytosis in Immunity, the Nervous System, and Development. BIOMED RESEARCH INTERNATIONAL 2021; 2021:1601565. [PMID: 34604381 PMCID: PMC8483919 DOI: 10.1155/2021/1601565] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 09/02/2021] [Accepted: 09/08/2021] [Indexed: 12/24/2022]
Abstract
Trogocytosis is a general biological process that involves one cell physically taking small parts of the membrane and other components from another cell. In trogocytosis, one cell seems to take little “bites” from another cell resulting in multiple outcomes from these cell-cell interactions. Trogocytosis was first described in protozoan parasites, which by taking pieces of host cells, kill them and cause tissue damage. Now, it is known that this process is also performed by cells of the immune system with important consequences such as cell communication and activation, elimination of microbial pathogens, and even control of cancer cells. More recently, trogocytosis has also been reported to occur in cells of the central nervous system and in various cells during development. Some of the molecules involved in phagocytosis also participate in trogocytosis. However, the molecular mechanisms that regulate trogocytosis are still a mystery. Elucidating these mechanisms is becoming a research area of much interest. For example, why neutrophils can engage trogocytosis to kill Trichomonas vaginalis parasites, but neutrophils use phagocytosis to eliminate already death parasites? Thus, trogocytosis is a significant process in normal physiology that multiple cells from different organisms use in various scenarios of health and disease. In this review, we present the basic principles known on the process of trogocytosis and discuss the importance in this process to host-pathogen interactions and to normal functions in the immune and nervous systems.
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18
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Evolution of antibodies to native trimeric envelope and their Fc dependent functions in untreated and treated primary HIV infection. J Virol 2021; 95:e0162521. [PMID: 34586863 DOI: 10.1128/jvi.01625-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
People living with HIV (PLWH) develop both anti-Envelope-specific antibodies, which bind the closed trimeric HIV Envelope present on infected cells and anti-gp120-specific antibodies, which bind gp120 monomers shed by infected cells and taken up by CD4 on uninfected bystander cells. Both antibodies have an Fc portion that binds to Fc Receptors on several types of innate immune cells and stimulates them to develop anti-viral functions. Among these Fc dependent functions (FcDFs) are antibody dependent (AD) cellular cytotoxicity (ADCC), AD cellular trogocytosis (ADCT) and AD phagocytosis (ADCP). Here, we assessed the evolution of total immunoglobulin G (IgG), anti-gp120 and anti-Envelope IgG antibodies and their FcDFs in plasma samples from anti-retroviral therapy (ART) naïve subjects during early HIV infection (28-194 days post infection [DPI]). We found that both the concentrations and FcDFs of anti-gp120 and anti-Envelope antibodies increased with time in ART-naïve PLWH. Although generated concurrently, anti-gp120-specific antibodies were 20.7-fold more abundant than anti-Envelpe-specific antibodies, both specificities being strongly correlated with each other and FcDFs. Among the FcDFs, only ADCP activity was inversely correlated with concurrent viral load. PLWH who started ART >90 DPI showed higher anti-Envelope-specific antibody levels, ADCT and ADCP activities than those starting ART <90 DPI. However, in longitudinally collected samples, ART initiation at >90 DPI was accompanied by a faster decline in anti-Envelope-specific antibody levels, which did not translate to a faster decline in FcDFs compared to those starting ART <90 DPI. IMPORTANCE Closed conformation Envelope is expressed on the surface of HIV-infected cells. Antibodies targeting this conformation and that support FcDFs have the potential to control HIV. This study tracks the timing of the appearance and evolution of antibodies to closed conformation Envelope, whose concentration increases over the first 6 mos of infection. Antiretroviral therapy (ART) initiation blunts further increases in the concentration of these antibodies and their and FcDFs. However, antibodies to open conformation Envelope also increase with DPI until ART initiation. These antibodies target uninfected bystander cells, which may contribute to loss of uninfected CD4 cells and pathogenicity. This manuscript presents, for the first time, the evolution of antibodies to closed conformation Envelope and their fate on-ART. This information may be useful in making decisions on the timing of ART initiation in early HIV infection.
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Abstract
Immunotherapy marked a milestone in cancer treatment and has shown unprecedented efficacy in a variety of hematological malignancies. Downregulation or loss of target antigens is commonly seen after immunotherapy, which often causes diagnostic dilemma and represents a key mechanism that tumor escapes from immunotherapy. The awareness of phenotypic changes after targeted immunotherapy is important to avoid misdiagnosis. Further understanding of the mechanisms of antigen loss is paramount for the development of therapeutic approaches that can prevent or overcome antigen escape in future immunotherapy.
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Affiliation(s)
- Ting Zhou
- Flow Cytometry Unit, Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA; Hematopathology Section, Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Hao-Wei Wang
- Flow Cytometry Unit, Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA; Hematopathology Section, Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
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20
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Miyake K, Karasuyama H. The Role of Trogocytosis in the Modulation of Immune Cell Functions. Cells 2021; 10:cells10051255. [PMID: 34069602 PMCID: PMC8161413 DOI: 10.3390/cells10051255] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/15/2021] [Accepted: 05/17/2021] [Indexed: 12/16/2022] Open
Abstract
Trogocytosis is an active process, in which one cell extracts the cell fragment from another cell, leading to the transfer of cell surface molecules, together with membrane fragments. Recent reports have revealed that trogocytosis can modulate various biological responses, including adaptive and innate immune responses and homeostatic responses. Trogocytosis is evolutionally conserved from protozoan parasites to eukaryotic cells. In some cases, trogocytosis results in cell death, which is utilized as a mechanism for antibody-dependent cytotoxicity (ADCC). In other cases, trogocytosis-mediated intercellular protein transfer leads to both the acquisition of novel functions in recipient cells and the loss of cellular functions in donor cells. Trogocytosis in immune cells is typically mediated by receptor–ligand interactions, including TCR–MHC interactions and Fcγ receptor-antibody-bound molecule interactions. Additionally, trogocytosis mediates the transfer of MHC molecules to various immune and non-immune cells, which confers antigen-presenting activity on non-professional antigen-presenting cells. In this review, we summarize the recent advances in our understanding of the role of trogocytosis in immune modulation.
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21
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Seymour EK, Khan HY, Li Y, Chaker M, Muqbil I, Aboukameel A, Ramchandren R, Houde C, Sterbis G, Yang J, Bhutani D, Pregja S, Reichel K, Huddlestun A, Neveux C, Corona K, Landesman Y, Shah J, Kauffman M, Shacham S, Mohammad RM, Azmi AS, Zonder JA. Selinexor in Combination with R-CHOP for Frontline Treatment of Non-Hodgkin Lymphoma: Results of a Phase I Study. Clin Cancer Res 2021; 27:3307-3316. [PMID: 33785483 DOI: 10.1158/1078-0432.ccr-20-4929] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/12/2021] [Accepted: 03/26/2021] [Indexed: 12/31/2022]
Abstract
PURPOSE The nuclear exporter protein exportin-1 (XPO1) is overexpressed in non-Hodgkin lymphoma (NHL) and correlates with poor prognosis. We evaluated enhancing R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone) activity in NHL by targeted inhibition of XPO1 using the selective inhibitor of nuclear export (SINE) compounds. PATIENTS AND METHODS We evaluated the antitumor activity of SINE compounds in combination with CHO chemotherapy in vitro and in vivo. Newly diagnosed NHL patients in a phase I dose-escalation study received R-CHOP for 6 cycles with weekly selinexor (60, 80, and 100 mg), then selinexor maintenance therapy for one year. RT-PCR, Western blotting, and RNA sequencing were performed on patient blood samples. RESULTS SINE compounds synergized with CHO in vitro in NHL cell lines and in vivo in our murine xenograft model. In our phase I study, selinexor was dosed at 60 mg (n = 6) and 80 mg (n = 6). The most common adverse events (AE) among 12 patients were fatigue (67%) and nausea (100%). Grade 3-4 AEs were infrequent. Ten evaluable patients had an overall response rate of 100% and complete remission rate of 90% with sustained remissions (median follow-up: 476 days). Maximally tolerated dose was not reached; however, the recommended phase II dose was 60 mg selinexor weekly after evaluating tolerability and discontinuation rates for each dose cohort. Analysis of patient blood samples revealed downregulation of XPO1 and several prosurvival markers. CONCLUSIONS SINE compounds enhance the activity of CHO in vitro and in vivo. Selinexor in combination with R-CHOP was generally well tolerated and showed encouraging efficacy in NHL (NCT03147885).
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Affiliation(s)
- Erlene K Seymour
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Husain Yar Khan
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Yiwei Li
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Mahmoud Chaker
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Irfana Muqbil
- Department of Chemistry, University of Detroit Mercy, Detroit, Michigan
| | - Amro Aboukameel
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | | | | | | | - Jay Yang
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Divaya Bhutani
- Department of Oncology, Columbia University, New York, New York
| | | | - Kathy Reichel
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | | | | | - Kelly Corona
- Karyopharm Therapeutics Inc., Newton, Massachusetts
| | | | - Jatin Shah
- Karyopharm Therapeutics Inc., Newton, Massachusetts
| | | | | | - Ramzi M Mohammad
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Asfar S Azmi
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan.
| | - Jeffrey A Zonder
- Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan.
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22
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Voltà-Durán E, Serna N, Sánchez-García L, Aviñó A, Sánchez JM, López-Laguna H, Cano-Garrido O, Casanova I, Mangues R, Eritja R, Vázquez E, Villaverde A, Unzueta U. Design and engineering of tumor-targeted, dual-acting cytotoxic nanoparticles. Acta Biomater 2021; 119:312-322. [PMID: 33189955 DOI: 10.1016/j.actbio.2020.11.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 11/09/2020] [Accepted: 11/10/2020] [Indexed: 02/07/2023]
Abstract
The possibility to conjugate tumor-targeted cytotoxic nanoparticles and conventional antitumoral drugs in single pharmacological entities would open a wide spectrum of opportunities in nanomedical oncology. This principle has been explored here by using CXCR4-targeted self-assembling protein nanoparticles based on two potent microbial toxins, the exotoxin A from Pseudomonas aeruginosa and the diphtheria toxin from Corynebacterium diphtheriae, to which oligo-floxuridine and monomethyl auristatin E respectively have been chemically coupled. The resulting multifunctional hybrid nanoconjugates, with a hydrodynamic size of around 50 nm, are stable and internalize target cells with a biological impact. Although the chemical conjugation minimizes the cytotoxic activity of the protein partner in the complexes, the concept of drug combination proposed here is fully feasible and highly promising when considering multiple drug treatments aimed to higher effectiveness or when facing the therapy of cancers with acquired resistance to classical drugs.
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Zent CS, Pinney JJ, Chu CC, Elliott MR. Complement Activation in the Treatment of B-Cell Malignancies. Antibodies (Basel) 2020; 9:E68. [PMID: 33271825 PMCID: PMC7709106 DOI: 10.3390/antib9040068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 09/30/2020] [Accepted: 11/22/2020] [Indexed: 12/13/2022] Open
Abstract
Unconjugated monoclonal antibodies (mAb) have revolutionized the treatment of B-cell malignancies. These targeted drugs can activate innate immune cytotoxicity for therapeutic benefit. mAb activation of the complement cascade results in complement-dependent cytotoxicity (CDC) and complement receptor-mediated antibody-dependent cellular phagocytosis (cADCP). Clinical and laboratory studies have showed that CDC is therapeutically important. In contrast, the biological role and clinical effects of cADCP are less well understood. This review summarizes the available data on the role of complement activation in the treatment of mature B-cell malignancies and proposes future research directions that could be useful in optimizing the efficacy of this important class of drugs.
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Affiliation(s)
- Clive S. Zent
- Wilmot Cancer Institute and Department of Medicine, University of Rochester Medical Center, Rochester, NY 14642, USA;
| | - Jonathan J. Pinney
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA; (J.J.P.); (M.R.E.)
- Center for Cell Clearance, University of Virginia, Charlottesville, VA 22908, USA
| | - Charles C. Chu
- Wilmot Cancer Institute and Department of Medicine, University of Rochester Medical Center, Rochester, NY 14642, USA;
| | - Michael R. Elliott
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA; (J.J.P.); (M.R.E.)
- Center for Cell Clearance, University of Virginia, Charlottesville, VA 22908, USA
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Klein C, Jamois C, Nielsen T. Anti-CD20 treatment for B-cell malignancies: current status and future directions. Expert Opin Biol Ther 2020; 21:161-181. [PMID: 32933335 DOI: 10.1080/14712598.2020.1822318] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
INTRODUCTION The introduction of anti-CD20 monoclonal antibody therapy with rituximab in the 1990s greatly improved outcomes for patients with B-cell malignancies. Disease resistance or relapse after successful initial therapy and declining efficacy of subsequent rounds of treatment were the basis for the development of alternative anti-CD20-based antibody therapies. AREAS COVERED The novel anti-CD20 antibodies of atumumab, ublituximab, and obinutuzumab were developed to be differentiated via structural and mechanistic features over rituximab. We provide an overview of preclinical and clinical data, and demonstrate ways in which the pharmacodynamic properties of these novel agents translate into clinical benefit for patients. EXPERT OPINION Of the novel anti-CD20 antibodies, only obinutuzumab has shown consistently improved efficacy over rituximab in randomized pivotal trials in indolent non-Hodgkin lymphoma and chronic lymphocytic leukemia. The Phase 3 GALLIUM trial demonstrated significant improvements in progression-free survival with obinutuzumab-based immunochemotherapy over rituximab-based immunochemotherapy. Novel combinations of obinutuzumab, including with chemotherapy-free options are being explored, such as with the newly approved combinations of obinutuzumab with venetoclax, ibrutinib, or acalabrutinib. The biggest unmet need remains in the treatment of diffuse large B-cell lymphoma; emerging options in this field include the use of CAR-T cells and T-cell bispecific antibodies.
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Affiliation(s)
- Christian Klein
- Roche Pharma Research & Early Development, Roche Innovation Center Zurich , Schlieren, Switzerland
| | - Candice Jamois
- Clinical Pharmacology, Pharmaceutical Sciences, Roche Pharma Research and Early Development, Roche Innovation Center Basel , Basel, Switzerland
| | - Tina Nielsen
- Product Development Oncology, F. Hoffmann-La Roche Ltd , Basel, Switzerland
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The Role of Complement in the Mechanism of Action of Therapeutic Anti-Cancer mAbs. Antibodies (Basel) 2020; 9:antib9040058. [PMID: 33126570 PMCID: PMC7709112 DOI: 10.3390/antib9040058] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/04/2020] [Accepted: 09/21/2020] [Indexed: 02/07/2023] Open
Abstract
Unconjugated anti-cancer IgG1 monoclonal antibodies (mAbs) activate antibody-dependent cellular cytotoxicity (ADCC) by natural killer (NK) cells and antibody-dependent cellular phagocytosis (ADCP) by macrophages, and these activities are thought to be important mechanisms of action for many of these mAbs in vivo. Several mAbs also activate the classical complement pathway and promote complement-dependent cytotoxicity (CDC), although with very different levels of efficacy, depending on the mAb, the target antigen, and the tumor type. Recent studies have unraveled the various structural factors that define why some IgG1 mAbs are strong mediators of CDC, whereas others are not. The role of complement activation and membrane inhibitors expressed by tumor cells, most notably CD55 and CD59, has also been quite extensively studied, but how much these affect the resistance of tumors in vivo to IgG1 therapeutic mAbs still remains incompletely understood. Recent studies have demonstrated that complement activation has multiple effects beyond target cell lysis, affecting both innate and adaptive immunity mediated by soluble complement fragments, such as C3a and C5a, and by stimulating complement receptors expressed by immune cells, including NK cells, neutrophils, macrophages, T cells, and dendritic cells. Complement activation can enhance ADCC and ADCP and may contribute to the vaccine effect of mAbs. These different aspects of complement are also briefly reviewed in the specific context of FDA-approved therapeutic anti-cancer IgG1 mAbs.
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Torka P, Barth M, Ferdman R, Hernandez-Ilizaliturri FJ. Mechanisms of Resistance to Monoclonal Antibodies (mAbs) in Lymphoid Malignancies. Curr Hematol Malig Rep 2020; 14:426-438. [PMID: 31559580 DOI: 10.1007/s11899-019-00542-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
PURPOSE OF REVIEW Passive immunotherapy with therapeutic monoclonal antibodies (mAbs) has revolutionized the treatment of cancer, especially hematological malignancies over the last 20 years. While use of mAbs has improved outcomes, development of resistance is inevitable in most cases, hindering the long-term survival of cancer patients. This review focuses on the available data on mechanisms of resistance to rituximab and includes some additional information for other mAbs currently in use in hematological malignancies. RECENT FINDINGS Mechanisms of resistance have been identified that target all described mechanisms of mAb activity including altered antigen expression or binding, impaired complement-mediated cytotoxicity (CMC) or antibody-dependent cellular cytotoxicity (ADCC), altered intracellular signaling effects, and inhibition of direct induction of cell death. Numerous approaches to circumvent identified mechanisms of resistance continue to be investigated, but a thorough understanding of which resistance mechanisms are most clinically relevant is still elusive. In recent years, a deeper understanding of the tumor microenvironment and targeting the apoptotic pathway has led to promising breakthroughs. Resistance may be driven by unique patient-, disease-, and antibody-related factors. Understanding the mechanisms of resistance to mAbs will guide the development of strategies to overcome resistance and re-sensitize cancer cells to these biological agents.
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MESH Headings
- Animals
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal/therapeutic use
- Antigens, Neoplasm/immunology
- Antineoplastic Agents, Immunological/pharmacology
- Antineoplastic Agents, Immunological/therapeutic use
- Apoptosis
- Complement System Proteins/immunology
- Drug Resistance, Neoplasm/genetics
- Humans
- Leukemia, Lymphoid/drug therapy
- Leukemia, Lymphoid/etiology
- Leukemia, Lymphoid/metabolism
- Leukemia, Lymphoid/pathology
- Lymphoma/drug therapy
- Lymphoma/etiology
- Lymphoma/metabolism
- Lymphoma/pathology
- Polymorphism, Genetic
- Receptors, IgG/metabolism
- Risk Factors
- Treatment Outcome
- Tumor Microenvironment
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Affiliation(s)
- Pallawi Torka
- Department of Medical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Mathew Barth
- Department of Pediatrics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Robert Ferdman
- Department of Medical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Francisco J Hernandez-Ilizaliturri
- Department of Medical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA.
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA.
- Department of Medicine, Jacob's School of Medicine and Biomedical Sciences, State University of New York, Buffalo, NY, USA.
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Biting Off What Can Be Chewed: Trogocytosis in Health, Infection, and Disease. Infect Immun 2020; 88:IAI.00930-19. [PMID: 32366574 DOI: 10.1128/iai.00930-19] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Trogocytosis is part of an emerging, exciting theme of cell-cell interactions both within and between species, and it is relevant to host-pathogen interactions in many different contexts. Trogocytosis is a process in which one cell physically extracts and ingests "bites" of cellular material from another cell. It was first described in eukaryotic microbes, where it was uncovered as a mechanism by which amoebae kill cells. Trogocytosis is potentially a fundamental form of eukaryotic cell-cell interaction, since it also occurs in multicellular organisms, where it has functions in the immune system, in the central nervous system, and during development. There are numerous scenarios in which trogocytosis occurs and an ever-evolving list of functions associated with this process. Many aspects of trogocytosis are relevant to microbial pathogenesis. It was recently discovered that immune cells perform trogocytosis to kill Trichomonas vaginalis parasites. Additionally, through trogocytosis, Entamoeba histolytica acquires and displays human cell membrane proteins, enabling immune evasion. Intracellular bacteria seem to exploit host cell trogocytosis, since they can use it to spread from cell to cell. Thus, a picture is emerging in which trogocytosis plays critical roles in normal physiology, infection, and disease.
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Abstract
Hodgkin lymphoma (HL) is a unique type of hematopoietic cancer that has few tumor cells but a massive infiltration of immune cells. Findings on how the cancerous Hodgkin and Reed-Sternberg (HRS) cells survive and evade immune surveillance have facilitated the development of novel immunotherapies for HL. Trogocytosis is a fast process of intercellular transfer of membrane patches, which can significantly affect immune responses. In this review, we summarize the current knowledge of how trogocytosis contributes to the suppression of immune responses in HL. We focus on the ectopic expression of CD137 on HRS cells, the cause of its expression, and its implication on developing novel therapies for HL. Further, we review data demonstrating that similar mechanisms apply to CD30, PD-L1 and CTLA-4.
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Affiliation(s)
- Qun Zeng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Immunology Programme, Life Sciences Institute, National University of Singapore, Singapore
| | - Herbert Schwarz
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Immunology Programme, Life Sciences Institute, National University of Singapore, Singapore
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Juárez-Salcedo LM, Conde-Royo D, Quiroz-Cervantes K, Dalia S. Use of anti-CD20 therapy in follicular and marginal zone lymphoma: a review of the literature. Drugs Context 2020; 9:2019-9-3. [PMID: 32426017 PMCID: PMC7216786 DOI: 10.7573/dic.2019-9-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 01/13/2020] [Accepted: 03/27/2020] [Indexed: 12/12/2022] Open
Abstract
The identification of the CD20 antigen in 1979 was the first step in what would become a therapeutic milestone opening the use of immunotherapy in hematological diseases. This protein is expressed on the surface of developing B cells, but not the early progenitors or mature plasma cells. In 1997, rituximab was approved by the Food and Drug Administration, and since then it has revolutionized the treatment of B-cell malignancies. It is used as a monotherapy and in combination, at induction, at relapsed, and also in maintenance. Indolent non-Hodgkin lymphomas are characterized by a long and non-aggressive course. In this group of lymphomas, rituximab represented a great therapeutic improvement, achieving lasting responses with few adverse effects. Nowadays, second-generation molecules are emerging that may have important advantages compared to rituximab, as well as biosimilars that represent an important cost-effective option.
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Affiliation(s)
| | - Diego Conde-Royo
- Hematology Department, Principe de Asturias General Hospital, Madrid, Spain
| | | | - Samir Dalia
- Hematology/Oncology Department, Mercy Clinic Oncology and Hematology – Joplin, Missouri, United States
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Deyà-Martínez A, Gordón Y, Molina-Anguita C, Vlagea A, Piquer M, Juan M, Esteve-Solé A, Antón J, Madrid Á, García-García A, Plaza AM, Armangue T, Alsina L. Single-cycle rituximab-induced immunologic changes in children: Enhanced in neuroimmunologic disease? NEUROLOGY-NEUROIMMUNOLOGY & NEUROINFLAMMATION 2020; 7:7/4/e724. [PMID: 32376706 PMCID: PMC7217658 DOI: 10.1212/nxi.0000000000000724] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 03/17/2020] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To investigate the immunologic impact of a single cycle of rituximab (RTX) in children and adolescents with immune-mediated disorders, we evaluated B cells and immunoglobulin levels of 20 patients with neuroimmunologic, nephrologic, dermatologic, and rheumatologic disorders treated under recommended guidelines. METHODS Retrospective study of immunologic changes in children (aged ≤18 years) diagnosed with immune-mediated disorders in which RTX was prescribed between June 2014 and February 2019. Patients were excluded if they had prior diagnosis of malignant disease or primary immunodeficiency. Patients were clinically and immunologically followed up every 3 months. Only patients having received a single cycle of RTX and with a follow-up greater than 12 months were included in the analysis of persistent dysgammaglobulinemia. RESULTS Twenty children were included. Median age at RTX treatment was 12.8 years (interquartile range [IQR] 6.6-15.5 years). Median follow-up was 12.6 months (IQR 10.2-24 months). Of the 14 patients eligible for persistent dysgammaglobulinemia analysis (3 had received RTX retreatment, 2 had <12 months post-RTX follow-up, and in 1 data for this time point was missing), 2/14 (14%) remained with complete B-cell depletion, and 5/14 (36%) had dysgammaglobulinemia. Patients with dysgammaglobulinemia were younger (7.8 vs 15.6 years, p = 0.072), had more underlying neuroimmunologic diseases (5/5 vs 0/9, p < 0.001), and had received more frequently concentrated doses of RTX (3/5 vs 1/9, p = 0.05) than patients without dysgammaglobulinemia. Kinetics of immunoglobulins in the 20 patients revealed a decrease as early as 3 months after RTX in patients with neuroimmunologic disorders. CONCLUSION In our cohort, single-cycle RTX-induced dysgammaglobulinemia was enhanced in patients with neuroimmunologic diseases. Further studies are needed to confirm this observation.
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Affiliation(s)
- Angela Deyà-Martínez
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Yadira Gordón
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Cristina Molina-Anguita
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Alexandru Vlagea
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Monica Piquer
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Manel Juan
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Ana Esteve-Solé
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Jordi Antón
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Álvaro Madrid
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Ana García-García
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Ana M Plaza
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain
| | - Thaís Armangue
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain.
| | - Laia Alsina
- From the Clinical Immunology and Primary Immunodeficiencies Unit (A.D.-M., A.E.-S., A.G.-G., L.A.), Pediatric Allergy and Clinical Immunology Department (A.D.-M., Y.G., M.P., A.E.-S., A.G.-G., A.M.P., L.A.), Hospital Sant Joan de Déu, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (A.D.-M., Y.G., M.P., A.E.-S., J.A., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Clinical Immunology Unit Hospital Sant Joan de Déu-Hospital Clínic (A.D.-M., A.V., M.P., M.J., A.E.-S., A.G.-G., A.M.P., L.A.), Barcelona, Spain; Universitat de Barcelona (J.A., L.A., M.J.), Spain; Immunology Department (A.V., M.J.), Biomedical Diagnostics Center, Hospital Clinic-IDIBAPS, Barcelona, Spain; Pediatric Neuroimmunology Unit (C.M.-A., T.A.), Neurology Department, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain; Neuroimmunology Program (T.A.), Institut D'Investigacions Biomèdiques (IDIBAPS), Hospital Clinic, University of Barcelona, Barcelona, Spain; Pediatric Rheumatology Division (J.A.), Hospital Sant Joan de Déu, Barcelona, Spain; and Pediatric Nephrology Department (Á.M.), Hospital Sant Joan de Déu, Barcelona, Spain.
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Anti-CD20–mediated B-cell depletion in autoimmune diseases: successes, failures and future perspectives. Kidney Int 2020; 97:885-893. [DOI: 10.1016/j.kint.2019.12.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 12/09/2019] [Accepted: 12/12/2019] [Indexed: 12/11/2022]
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Malenge MM, Patzke S, Ree AH, Stokke T, Ceuppens P, Middleton B, Dahle J, Repetto-Llamazares AHV. 177Lu-Lilotomab Satetraxetan Has the Potential to Counteract Resistance to Rituximab in Non-Hodgkin Lymphoma. J Nucl Med 2020; 61:1468-1475. [PMID: 32245896 PMCID: PMC7539655 DOI: 10.2967/jnumed.119.237230] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 01/29/2020] [Indexed: 12/18/2022] Open
Abstract
Patients with non-Hodgkin lymphoma (NHL) who are treated with rituximab may develop resistant disease, often associated with changes in expression of CD20. The next-generation β-particle–emitting radioimmunoconjugate 177Lu-lilotomab-satetraxetan (Betalutin) was shown to up-regulate CD20 expression in different rituximab-sensitive NHL cell lines and to act synergistically with rituximab in a rituximab-sensitive NHL animal model. We hypothesized that 177Lu-lilotomab-satetraxetan may be used to reverse rituximab resistance in NHL. Methods: The rituximab-resistant Raji2R and the parental Raji cell lines were used. CD20 expression was measured by flow cytometry. Antibody-dependent cellular cytotoxicity (ADCC) was measured by a bioluminescence reporter assay. The efficacies of combined treatments with 177Lu-lilotomab-satetraxetan (150 or 350 MBq/kg) and rituximab (4 × 10 mg/kg) were compared with those of single agents or phosphate-buffered saline in a Raji2R-xenograft model. Cox regression and the Bliss independence model were used to assess synergism. Results: Rituximab binding in Raji2R cells was 36% ± 5% of that in the rituximab-sensitive Raji cells. 177Lu-lilotomab-satetraxetan treatment of Raji2R cells increased the binding to 53% ± 3% of the parental cell line. Rituximab ADCC induction in Raji2R cells was 20% ± 2% of that induced in Raji cells, whereas treatment with 177Lu-lilotomab-satetraxetan increased the ADCC induction to 30% ± 3% of that in Raji cells, representing a 50% increase (P < 0.05). The combination of rituximab with 350 MBq/kg 177Lu-lilotomab-satetraxetan synergistically suppressed Raji2R tumor growth in athymic Foxn1nu mice. Conclusion:177Lu-lilotomab-satetraxetan has the potential to reverse rituximab resistance; it can increase rituximab binding and ADCC activity in vitro and can synergistically improve antitumor efficacy in vivo.
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Affiliation(s)
- Marion M Malenge
- Nordic Nanovector ASA, Oslo, Norway.,Department of Radiation Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Sebastian Patzke
- Nordic Nanovector ASA, Oslo, Norway.,Department of Radiation Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
| | - Anne H Ree
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Oncology, Akershus University Hospital, Lørenskog, Norway; and
| | - Trond Stokke
- Department of Radiation Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
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Sun M, Zhang H. Therapeutic antibodies for mantle cell lymphoma: A brand-new era ahead. Heliyon 2019; 5:e01297. [PMID: 31016256 PMCID: PMC6475712 DOI: 10.1016/j.heliyon.2019.e01297] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/17/2019] [Accepted: 02/26/2019] [Indexed: 12/16/2022] Open
Abstract
Mantle cell lymphoma (MCL) is a heterogeneous aggressive disease and remains incurable with current chemotherapies. The development of monoclonal antibody (mAb) has led to substantial achievement in immunotherapeutic strategies for B-cell lymphomas including MCL. Nonetheless, progress in the clinical use of mAbs is hindered by poor efficacy, off-target toxicities and drug resistance. Thus, novel mAbs engineering and approaches to improve target specificity and enhance affinity and potency are required. In this review, we highlight the latest advances of therapeutic antibodies in MCL, alone or in combination with other strategies and agents, with a particular focus on the current challenges and future prospective.
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Affiliation(s)
- Ming Sun
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, 650031, China
| | - Han Zhang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, 650031, China
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Akuta K, Kashiwagi H, Yujiri T, Nishiura N, Morikawa Y, Kato H, Honda S, Kanakura Y, Tomiyama Y. A unique phenotype of acquired Glanzmann thrombasthenia due to non-function-blocking anti-αIIbβ3 autoantibodies. J Thromb Haemost 2019; 17:206-219. [PMID: 30388316 DOI: 10.1111/jth.14323] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 10/27/2018] [Indexed: 11/29/2022]
Abstract
Essentials Acquired Glanzmann thrombasthenia (aGT) is generally caused by function-blocking antibodies (Abs). We demonstrated a unique aGT case due to marked reduction of αIIbβ3 with anti-αIIbβ3 Abs. The anti-αIIbβ3 Abs of the patient did not inhibit platelet function but reduced surface αIIbβ3. Internalization of αIIbβ3 induced by the Abs binding may be responsible for the phenotype. SUMMARY: Background Acquired Glanzmann thrombasthenia (aGT) is a bleeding disorder generally caused by function-blocking anti-αIIbβ3 autoantibodies. Aim We characterize an unusual case of aGT caused by marked reduction of surface αIIbβ3 with non-function-blocking anti-αIIbβ3 antibodies (Abs). Methods A 72-year-old male suffering from immune thrombocytopenia since his 50s showed exacerbation of bleeding symptom despite mild thrombocytopenia. Platelet aggregation was absent with all agonists but ristocetin. Analysis of αIIbβ3 expression and genetic analysis were performed. We also analyzed effects of anti-αIIbβ3 Abs of the patient on platelet function and αIIbβ3 expression. Results Surface αIIbβ3 expression was markedly reduced to around 5% of normal, whereas his platelets contained αIIbβ3 to the amount of 40-50% of normal. A substantial amount of fibrinogen was also detected in his platelets. There were no abnormalities in ITGA2B and ITGB3 cDNA. These results indicated that reduced surface αIIbβ3 expression caused a GT phenotype, and active internalization of αIIbβ3 was suggested. Anti-αIIbβ3 IgG Abs were detected in platelet eluate and plasma. These Abs did not inhibit PAC-1 binding, indicating that the Abs were non-function-blocking. Surface αIIbβ3 expression of a megakaryocytic cell line and cultured megakaryocytes tended to be impaired by incubation with the patient's Abs. After 2 years of aGT diagnosis, his bleeding symptom improved and surface αIIbβ3 expression was recovered to 20% of normal with reduction of anti-αIIbβ3 Abs. Conclusion We demonstrated a unique aGT phenotype due to marked reduction of surface αIIbβ3. Internalization induced by anti-αIIbβ3 Abs may be responsible in part for the phenotype.
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Affiliation(s)
- K Akuta
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - H Kashiwagi
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - T Yujiri
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Japan
| | - N Nishiura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Y Morikawa
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - H Kato
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - S Honda
- Department of Molecular Pathogenesis, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Y Kanakura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Y Tomiyama
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
- Department of Blood Transfusion, Osaka University Hospital, Suita, Japan
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Yang J, Li L, Kopeček J. Biorecognition: A key to drug-free macromolecular therapeutics. Biomaterials 2018; 190-191:11-23. [PMID: 30391799 DOI: 10.1016/j.biomaterials.2018.10.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/02/2018] [Accepted: 10/07/2018] [Indexed: 12/13/2022]
Abstract
This review highlights a new paradigm in macromolecular nanomedicine - drug-free macromolecular therapeutics (DFMT). The effectiveness of the new system is based on biorecognition events without the participation of low molecular weight drugs. Apoptosis of cells can be initiated by the biorecognition of complementary peptide/oligonucleotide motifs at the cell surface resulting in the crosslinking of slowly internalizing receptors. B-cell CD20 receptors and Non-Hodgkin lymphoma (NHL) were chosen as the first target. Exposing cells to a conjugate of one motif with a targeting ligand decorates the cells with this motif. Further exposure of decorated cells to a macromolecule (synthetic polymer or human serum albumin) containing multiple copies of the complementary motif as grafts results in receptor crosslinking and apoptosis induction in vitro and in vivo. The review focuses on recent developments and explores the mechanism of action of DFMT. The altered molecular signaling pathways demonstrated the great potential of DFMT to overcome rituximab resistance resulting from either down-regulation of CD20 or endocytosis and trogocytosis of rituximab/CD20 complexes. The suitability of this approach for the treatment of blood borne cancers is confirmed. In addition, the widespread applicability of DFMT as a new concept in macromolecular therapeutics for numerous diseases is exposed.
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Affiliation(s)
- Jiyuan Yang
- Department of Pharmaceutics and Pharmaceutical Chemistry, Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, UT 84112, USA.
| | - Lian Li
- Department of Pharmaceutics and Pharmaceutical Chemistry, Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, UT 84112, USA
| | - Jindřich Kopeček
- Department of Pharmaceutics and Pharmaceutical Chemistry, Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, UT 84112, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA
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Measuring the ability of HIV-specific antibodies to mediate trogocytosis. J Immunol Methods 2018; 463:71-83. [PMID: 30240705 DOI: 10.1016/j.jim.2018.09.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 09/14/2018] [Accepted: 09/14/2018] [Indexed: 12/20/2022]
Abstract
Antibody Fc effector functions contribute to HIV control and have been implicated in the partial efficacy seen in the RV144 vaccine trial. Fc-mediated trogocytosis has been previously described for anti-cancer antibodies and results in the removal of membrane fragments from target cells. Here we developed a flow cytometry-based assay which measures the transfer of membrane fragments from a gp120-coated CD4+ lymphocytic cell line (CEM.NKR-CCR5 cells stained with a membrane dye PKH26) to monocytic cells (THP-1 cells stained with CFSE). We showed that this transfer occurred rapidly, within 1 h, and was mediated through engagement of the FcγRIIa/b receptors on the THP-1 cells. HIV-specific IgG as well as gp120 and CD4 could be detected on the surface of THP-1 cells in a process that we demonstrated was distinct from phagocytosis. Furthermore, while the THP-1 effector cells remained intact following the receipt of new membrane proteins, the viability of the target CEM.NKR-CCR5 cells decreased over time. Analysis of HIV-specific plasma revealed that antibodies with trogocytic activity were common in acute and chronic HIV infection but were higher in individuals with broadly neutralizing antibody responses We also examined trogocytosis mediated by broadly neutralizing antibodies (bNAbs) targeting multiple epitopes on the BG505.SOSIP.664 trimer and show that levels of binding correlated with the trogocytosis score. Overall, our data describe a new antiviral Fc effector function mediated by HIV-specific antibodies that could be harnessed for vaccination and cure strategies.
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37
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Dahal LN, Huang CY, Stopforth RJ, Mead A, Chan K, Bowater JX, Taylor MC, Narang P, Chan HTC, Kim JH, Vaughan AT, Forconi F, Beers SA. Shaving Is an Epiphenomenon of Type I and II Anti-CD20-Mediated Phagocytosis, whereas Antigenic Modulation Limits Type I Monoclonal Antibody Efficacy. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2018; 201:1211-1221. [PMID: 29997125 PMCID: PMC6082343 DOI: 10.4049/jimmunol.1701122] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 06/10/2018] [Indexed: 01/09/2023]
Abstract
Rituximab is an anti-CD20 mAb used in the treatment of B cell malignancies. Loss of surface CD20 Ag from the surface of target cells is thought to be one mechanism governing resistance to rituximab, but how this occurs is not completely understood. Two explanations for this have been proposed: antigenic modulation whereby mAb:CD20 complexes are internalized in a B cell intrinsic process and shaving, in which mAb:CD20 complexes undergo trogocytic removal by effector cells, such as macrophages. However, there is conflicting evidence as to which predominates in clinical scenarios and hence the best strategies to overcome resistance. In this study, we investigated the relative importance of modulation and shaving in the downregulation of surface mAb:CD20. We used both murine and human systems and treated ex vivo macrophages with varying concentrations of non-FcγR-interacting beads to achieve differential macrophage saturation states, hence controllably suppressing further phagocytosis of target cells. We then monitored the level and localization of mAb:CD20 using a quenching assay. Suppression of phagocytosis with bead treatment decreased shaving and increased modulation, suggesting that the two compete for surface rituximab:CD20. Under all conditions tested, modulation predominated in rituximab loss, whereas shaving represented an epiphenomenon to phagocytosis. We also demonstrate that the nonmodulating, glycoengineered, type II mAb obinutuzumab caused a modest but significant increase in shaving compared with type II BHH2 human IgG1 wild-type mAb. Therefore, shaving may represent an important mechanism of resistance when modulation is curtailed, and glycoengineering mAb to increase affinity for FcγR may enhance resistance because of shaving.
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Affiliation(s)
- Lekh N Dahal
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Chie-Yin Huang
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Richard J Stopforth
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Abbie Mead
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Keith Chan
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Juliet X Bowater
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Martin C Taylor
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Priyanka Narang
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - H T Claude Chan
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Jinny H Kim
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Andrew T Vaughan
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
| | - Francesco Forconi
- Cancer Sciences Unit, Cancer Research UK and National Institute for Health Research Experimental Cancer Medicine Centres, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom
| | - Stephen A Beers
- Antibody and Vaccine Group, Centre for Cancer Immunology, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; and
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Freeman CL, Sehn LH. A tale of two antibodies: obinutuzumabversusrituximab. Br J Haematol 2018; 182:29-45. [DOI: 10.1111/bjh.15232] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ciara L. Freeman
- Centre for Lymphoid Cancer; British Columbia Cancer and the University of British Columbia; Vancouver BC Canada
| | - Laurie H. Sehn
- Centre for Lymphoid Cancer; British Columbia Cancer and the University of British Columbia; Vancouver BC Canada
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Li L, Yang J, Wang J, Kopeček J. Amplification of CD20 Cross-Linking in Rituximab-Resistant B-Lymphoma Cells Enhances Apoptosis Induction by Drug-Free Macromolecular Therapeutics. ACS NANO 2018; 12:3658-3670. [PMID: 29595951 PMCID: PMC5916500 DOI: 10.1021/acsnano.8b00797] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Although the CD20-targeted monoclonal antibody rituximab (RTX) has revolutionized the therapeutic landscape for B-cell malignancy, relapsed and refractory disease due to RTX resistance continue to constitute major challenges, illustrating the need for better therapies. Here, we apply drug-free macromolecular therapeutics (DFMT) that amplifies CD20 cross-linking to enhance apoptosis in RTX-resistant cells. Bispecific engager (anti-CD20 Fab' conjugated with oligonucleotide1) pretargets CD20 and the deletion of Fc-region minimizes its premature endocytosis in resistant cells that rapidly internalize and consume CD20/RTX complexes. Second-step delivery of multivalent polymeric effector (linear copolymer conjugated with multiple copies of complementary oligonucleotide 2) simultaneously hybridizes multiple CD20-bound engagers and strengthens CD20 ligation. Moreover, the restoration of CD20 expression by the pretreatment of cells with a polymer-gemcitabine conjugate, a CD20 expression enhancer, unleashes the full potential of DFMT in the CD20-deficient resistant cells. Hence, amplification of CD20 cross-linking is achieved by (1) the enhancement of surface CD20 accessibility, (2) the increase in CD20 expression, and (3) multimeric CD20 binding, which ultimately translates into the amplified activation of a wide range of innate apoptotic responses. We demonstrated that the altered molecular signaling pathway that originally results in RTX resistance could be circumvented and compensated by other DFMT-augmented pathways. Of note, our preliminary data provide proof-of-concept that CD20 cross-linking amplification emerges as an important strategy for overcoming RTX resistance.
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Affiliation(s)
- Lian Li
- Department of Pharmaceutics and Pharmaceutical Chemistry/Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jiyuan Yang
- Department of Pharmaceutics and Pharmaceutical Chemistry/Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jiawei Wang
- Department of Pharmaceutics and Pharmaceutical Chemistry/Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jindřich Kopeček
- Department of Pharmaceutics and Pharmaceutical Chemistry/Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, Utah 84112, United States
- Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112, United States
- Corresponding Author: . Phone: +1 (801) 581-7211. Fax: +1 (801) 581-7848
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Arlauckas SP, Garris CS, Kohler RH, Kitaoka M, Cuccarese MF, Yang KS, Miller MA, Carlson JC, Freeman GJ, Anthony RM, Weissleder R, Pittet MJ. In vivo imaging reveals a tumor-associated macrophage-mediated resistance pathway in anti-PD-1 therapy. Sci Transl Med 2018; 9:9/389/eaal3604. [PMID: 28490665 DOI: 10.1126/scitranslmed.aal3604] [Citation(s) in RCA: 418] [Impact Index Per Article: 69.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 11/07/2016] [Accepted: 03/16/2017] [Indexed: 12/11/2022]
Abstract
Monoclonal antibodies (mAbs) targeting the immune checkpoint anti-programmed cell death protein 1 (aPD-1) have demonstrated impressive benefits for the treatment of some cancers; however, these drugs are not always effective, and we still have a limited understanding of the mechanisms that contribute to their efficacy or lack thereof. We used in vivo imaging to uncover the fate and activity of aPD-1 mAbs in real time and at subcellular resolution in mice. We show that aPD-1 mAbs effectively bind PD-1+ tumor-infiltrating CD8+ T cells at early time points after administration. However, this engagement is transient, and aPD-1 mAbs are captured within minutes from the T cell surface by PD-1- tumor-associated macrophages. We further show that macrophage accrual of aPD-1 mAbs depends both on the drug's Fc domain glycan and on Fcγ receptors (FcγRs) expressed by host myeloid cells and extend these findings to the human setting. Finally, we demonstrate that in vivo blockade of FcγRs before aPD-1 mAb administration substantially prolongs aPD-1 mAb binding to tumor-infiltrating CD8+ T cells and enhances immunotherapy-induced tumor regression in mice. These investigations yield insight into aPD-1 target engagement in vivo and identify specific Fc/FcγR interactions that can be modulated to improve checkpoint blockade therapy.
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Affiliation(s)
- Sean P Arlauckas
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Radiology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA
| | - Christopher S Garris
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Graduate Program in Immunology, Harvard Medical School, Boston, MA 02115, USA
| | - Rainer H Kohler
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Maya Kitaoka
- Center for Immunology and Infectious Disease, Massachusetts General Hospital, 149 8th Street, Charlestown, MA 02129, USA
| | - Michael F Cuccarese
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Katherine S Yang
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Miles A Miller
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Radiology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Jonathan C Carlson
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Gordon J Freeman
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Robert M Anthony
- Center for Immunology and Infectious Disease, Massachusetts General Hospital, 149 8th Street, Charlestown, MA 02129, USA
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Radiology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA
| | - Mikael J Pittet
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA. .,Department of Radiology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
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41
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Gach JS, Bouzin M, Wong MP, Chromikova V, Gorlani A, Yu KT, Sharma B, Gratton E, Forthal DN. Human immunodeficiency virus type-1 (HIV-1) evades antibody-dependent phagocytosis. PLoS Pathog 2017; 13:e1006793. [PMID: 29281723 PMCID: PMC5760106 DOI: 10.1371/journal.ppat.1006793] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 01/09/2018] [Accepted: 12/07/2017] [Indexed: 12/20/2022] Open
Abstract
Fc gamma receptor (FcyR)-mediated antibody functions play a crucial role in preventing HIV infection. One such function, antibody-dependent phagocytosis (ADP), is thought to be involved in controlling other viral infections, but its role in HIV infection is unknown. We measured the ability of HIV-specific polyclonal and monoclonal antibodies (mAbs) to mediate the internalization of HIV-1 virions and HIV-1-decorated cells by phagocytes. To measure ADP of virions, we primarily used a green-fluorescent protein-expressing molecular clone of HIV-1JRFL, an R5, clinical isolate, in combination with polyclonal HIVIG or mAbs known to capture and/or neutralize HIV-1. THP-1 and U937 cells, as well as freshly isolated primary monocytes from healthy individuals, were used as phagocytic effector cells, and uptake of virions was measured by cytometry. We surprisingly found minimal or no ADP of virions with any of the antibodies. However, after coating virions with gp41 or with gp41-derived peptides, gp41- (but not gp120-) specific mAbs efficiently mediated phagocytosis. We estimated that a minimum of a few hundred gp41 molecules were needed for successful phagocytosis, which is similar to the number of envelope spikes on viruses that are readily phagocytosed (e.g. influenza virus). Furthermore, by employing fluorescence correlation spectroscopy, a well-established technique to measure particle sizes and aggregation phenomena, we found a clear association between virus aggregation and ADP. In contrast to virions themselves, virion-decorated cells were targets for ADP or trogocytosis in the presence of HIV-specific antibodies. Our findings indicate that ADP of virions may not play a role in preventing HIV infection, likely due to the paucity of trimers and the consequent inability of virion-bound antibody to cross-link FcyRs on phagocytes. However, ADP or trogocytosis could play a role in clearing HIV-infected cells and cells on the verge of infection.
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Affiliation(s)
- Johannes S. Gach
- Department of Medicine, Division of Infectious Diseases, University of California, Irvine School of Medicine, Irvine, California, United States of America
- * E-mail: (JSG); (DNF)
| | - Margaux Bouzin
- Department of Biomedical Engineering, University of California, Irvine, Irvine, California, United States of America
- Laboratory for Fluorescence Dynamics, University of California, Irvine, Irvine, California, United States of America
| | - Marcus P. Wong
- Department of Medicine, Division of Infectious Diseases, University of California, Irvine School of Medicine, Irvine, California, United States of America
| | - Veronika Chromikova
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Andrea Gorlani
- Department of Medicine, Division of Infectious Diseases, University of California, Irvine School of Medicine, Irvine, California, United States of America
| | - Kuan-Ting Yu
- Department of Medicine, Division of Infectious Diseases, University of California, Irvine School of Medicine, Irvine, California, United States of America
| | - Brijesh Sharma
- Department of Medicine, Division of Infectious Diseases, University of California, Irvine School of Medicine, Irvine, California, United States of America
| | - Enrico Gratton
- Department of Biomedical Engineering, University of California, Irvine, Irvine, California, United States of America
- Laboratory for Fluorescence Dynamics, University of California, Irvine, Irvine, California, United States of America
| | - Donald N. Forthal
- Department of Medicine, Division of Infectious Diseases, University of California, Irvine School of Medicine, Irvine, California, United States of America
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, California, United States of America
- * E-mail: (JSG); (DNF)
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42
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Krejcik J, Frerichs KA, Nijhof IS, van Kessel B, van Velzen JF, Bloem AC, Broekmans MEC, Zweegman S, van Meerloo J, Musters RJP, Poddighe PJ, Groen RWJ, Chiu C, Plesner T, Lokhorst HM, Sasser AK, Mutis T, van de Donk NWCJ. Monocytes and Granulocytes Reduce CD38 Expression Levels on Myeloma Cells in Patients Treated with Daratumumab. Clin Cancer Res 2017; 23:7498-7511. [PMID: 29025767 PMCID: PMC5732844 DOI: 10.1158/1078-0432.ccr-17-2027] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 09/01/2017] [Accepted: 09/28/2017] [Indexed: 12/21/2022]
Abstract
Purpose: Daratumumab treatment results in a marked reduction of CD38 expression on multiple myeloma cells. The aim of this study was to investigate the clinical implications and the underlying mechanisms of daratumumab-mediated CD38 reduction.Experimental Design: We evaluated the effect of daratumumab alone or in combination with lenalidomide-dexamethasone, on CD38 levels of multiple myeloma cells and nontumor immune cells in the GEN501 study (daratumumab monotherapy) and the GEN503 study (daratumumab combined with lenalidomide-dexamethasone). In vitro assays were also performed.Results: In both trials, daratumumab reduced CD38 expression on multiple myeloma cells within hours after starting the first infusion, regardless of depth and duration of the response. In addition, CD38 expression on nontumor immune cells, including natural killer cells, T cells, B cells, and monocytes, was also reduced irrespective of alterations in their absolute numbers during therapy. In-depth analyses revealed that CD38 levels of multiple myeloma cells were only reduced in the presence of complement or effector cells, suggesting that the rapid elimination of CD38high multiple myeloma cells can contribute to CD38 reduction. In addition, we discovered that daratumumab-CD38 complexes and accompanying cell membrane were actively transferred from multiple myeloma cells to monocytes and granulocytes. This process of trogocytosis was also associated with reduced surface levels of some other membrane proteins, including CD49d, CD56, and CD138.Conclusions: Daratumumab rapidly reduced CD38 expression levels, at least in part, through trogocytosis. Importantly, all these effects also occurred in patients with deep and durable responses, thus excluding CD38 reduction alone as a mechanism of daratumumab resistance.The trials were registered at www.clinicaltrials.gov as NCT00574288 (GEN501) and NCT1615029 (GEN503). Clin Cancer Res; 23(24); 7498-511. ©2017 AACR.
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Affiliation(s)
- Jakub Krejcik
- Department of Hematology, VU University Medical Center, Amsterdam, the Netherlands
- Vejle Hospital and University of Southern Denmark, Vejle, Denmark
| | - Kris A Frerichs
- Department of Hematology, VU University Medical Center, Amsterdam, the Netherlands
| | - Inger S Nijhof
- Department of Hematology, VU University Medical Center, Amsterdam, the Netherlands
| | - Berris van Kessel
- Department of Hematology, VU University Medical Center, Amsterdam, the Netherlands
| | - Jeroen F van Velzen
- Laboratory for Translational Immunology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Andries C Bloem
- Laboratory for Translational Immunology, University Medical Center Utrecht, Utrecht, the Netherlands
| | | | - Sonja Zweegman
- Department of Hematology, VU University Medical Center, Amsterdam, the Netherlands
| | - Johan van Meerloo
- Department of Hematology, VU University Medical Center, Amsterdam, the Netherlands
| | - René J P Musters
- Department of Physiology, VU University, Amsterdam, the Netherlands
| | - Pino J Poddighe
- Department of Clinical Genetics, VU University Medical Center, Amsterdam, the Netherlands
| | - Richard W J Groen
- Department of Hematology, VU University Medical Center, Amsterdam, the Netherlands
| | | | - Torben Plesner
- Vejle Hospital and University of Southern Denmark, Vejle, Denmark
| | - Henk M Lokhorst
- Department of Hematology, VU University Medical Center, Amsterdam, the Netherlands
| | - A Kate Sasser
- Janssen Research and Development, Spring House, Pennsylvania
| | - Tuna Mutis
- Department of Hematology, VU University Medical Center, Amsterdam, the Netherlands
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43
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Association of rituximab with graphene oxide confers direct cytotoxicity for CD20-positive lymphoma cells. Oncotarget 2017; 7:12806-22. [PMID: 26859679 PMCID: PMC4914323 DOI: 10.18632/oncotarget.7230] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 01/26/2016] [Indexed: 11/29/2022] Open
Abstract
Non-Hodgkin lymphoma (NHL) is one of the most common hematologic malignancies among adults for which the chimeric monoclonal anti-CD20 antibody (Ab) rituximab (RTX) is used as first-line therapy. As RTX itself is not directly cytotoxic but relies on host immune effector mechanisms or chemotherapeutic agents to attack target cells, its therapeutic capacity may become limited when host effector mechanisms are compromised. Currently, refractory disease and relapse with NHL are still common, highlighting the need for novel anti-CD20 antibody strategies with superior therapeutic efficacy over current protocols. We hypothesized that making RTX directly cytotoxic might improve the therapeutic efficacy. Graphene oxide (GO) has recently emerged as a highly attractive nanomaterial for biomedical applications; and several studies have reported cytotoxic effect of GO on benign and malignant cells in vitro. Herein, we report that RTX can be stably associated with GO, and that GO-associated RTX (RTX/GO) demonstrates remarkably high avidity for CD20. Binding of GO-associated RTX to CD20-positive lymphoma cells induces CD20 capping and target cell death through an actin dependent mechanism. In vivo, GO-associated RTX, but not free RTX, quickly eliminates high-grade lymphomas in the absence of host effector mechanisms in a xenograft lymphoma mouse model. Our findings represent the first demonstration of using GO-associated antibody as effective cytotoxic therapy for human B cell malignancies in the absence of chemotherapy, and these findings could have important clinical implications.
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44
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Avasarala J. Anti-CD20 Cell Therapies in Multiple Sclerosis-A Fixed Dosing Schedule for Ocrelizumab is Overkill. Drug Target Insights 2017; 11:1177392817737515. [PMID: 29123374 PMCID: PMC5661702 DOI: 10.1177/1177392817737515] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 09/04/2017] [Indexed: 01/14/2023] Open
Abstract
Anti-CD 20 therapies have found significant uses in multiple sclerosis (MS). Based singularly on the accumulated evidence with the use of rituximab (RTX; Rituxan, Genentech, and Biogen) in neuroimmunological diseases, ocrelizumab (OCR; Ocrevus, Genentech) was developed as a treatment option for MS and selectively targets CD20 B cells, a cell surface antigen found on pre-B cells, mature, and memory B cells, but not on lymphoid stem cells and plasma cells. On the basis of indirect evidence, elimination of the antigen-presenting capabilities and antigen nonspecific immune functions of B cells appear to be central to the therapeutic efficacy of anti-CD20 B-cell therapies. An important question is this—Why does the drug need to be dosed at fixed intervals and not based on a measurable endpoint, such as tracking peripheral CD20 cell counts? There is minimal scientific validity in infusing the drug every 6 months particularly if CD20 cell counts are negligible in the peripheral blood. In this analysis, a case is made for following CD19 cell populations as a surrogate for CD20 cells on a monthly basis to guide OCR redosing parameters and does not follow a scheduled dosing parameter.
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Affiliation(s)
- Jagannadha Avasarala
- Department of Medicine, Division of Neurology, USC School of Medicine Greenville, Greenville, SC, USA.,Department of Internal Medicine, Division of Neurology, USC School of Medicine and UMG-Neuroscience Associates, Greenville, SC, USA
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45
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Elayeb R, Tamagne M, Pinheiro M, Ripa J, Djoudi R, Bierling P, Pirenne F, Vingert B. Anti-CD20 Antibody Prevents Red Blood Cell Alloimmunization in a Mouse Model. THE JOURNAL OF IMMUNOLOGY 2017; 199:3771-3780. [DOI: 10.4049/jimmunol.1700754] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 09/20/2017] [Indexed: 12/24/2022]
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46
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HDAC6 inhibition upregulates CD20 levels and increases the efficacy of anti-CD20 monoclonal antibodies. Blood 2017; 130:1628-1638. [PMID: 28830887 DOI: 10.1182/blood-2016-08-736066] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 08/07/2017] [Indexed: 11/20/2022] Open
Abstract
Downregulation of CD20, a molecular target for monoclonal antibodies (mAbs), is a clinical problem leading to decreased efficacy of anti-CD20-based therapeutic regimens. The epigenetic modulation of CD20 coding gene (MS4A1) has been proposed as a mechanism for the reduced therapeutic efficacy of anti-CD20 antibodies and confirmed with nonselective histone deacetylase inhibitors (HDACis). Because the use of pan-HDACis is associated with substantial adverse effects, the identification of particular HDAC isoforms involved in CD20 regulation seems to be of paramount importance. In this study, we demonstrate for the first time the role of HDAC6 in the regulation of CD20 levels. We show that inhibition of HDAC6 activity significantly increases CD20 levels in established B-cell tumor cell lines and primary malignant cells. Using pharmacologic and genetic approaches, we confirm that HDAC6 inhibition augments in vitro efficacy of anti-CD20 mAbs and improves survival of mice treated with rituximab. Mechanistically, we demonstrate that HDAC6 influences synthesis of CD20 protein independently of the regulation of MS4A1 transcription. We further demonstrate that translation of CD20 mRNA is significantly enhanced after HDAC6 inhibition, as shown by the increase of CD20 mRNA within the polysomal fraction, indicating a new role of HDAC6 in the posttranscriptional mechanism of CD20 regulation. Collectively, our findings suggest HDAC6 inhibition is a rational therapeutic strategy to be implemented in combination therapies with anti-CD20 monoclonal antibodies and open up novel avenues for the clinical use of HDAC6 inhibitors.
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47
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Skopelja-Gardner S, Jones JD, Hamilton BJ, Danilov AV, Rigby WFC. Role for ZAP-70 Signaling in the Differential Effector Functions of Rituximab and Obinutuzumab (GA101) in Chronic Lymphocytic Leukemia B Cells. THE JOURNAL OF IMMUNOLOGY 2017; 199:1275-1282. [DOI: 10.4049/jimmunol.1602105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 06/16/2017] [Indexed: 11/19/2022]
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48
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Bagacean C, Zdrenghea M, Tempescul A, Cristea V, Renaudineau Y. Anti-CD20 monoclonal antibodies in chronic lymphocytic leukemia: from uncertainties to promises. Immunotherapy 2017; 8:569-81. [PMID: 27140410 DOI: 10.2217/imt-2015-0015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Over the last two decades, anti-CD20 monoclonal antibody (mAb) therapy has improved patient outcome in B-cell malignancies, and confirmed CD20 as an important target in chronic lymphocytic leukemia (CLL). Until recently, the gold standard was based on the utilization of rituximab combined with chemotherapy (fludarabine and cyclophosphamide), but patients often relapse. Next, with our better understanding of mAb engineering, anti-CD20 mAb therapy has evolved with the development of new mAb permitting significant clinical responses by improving pharmacokinetics, safety, activity and immunogenicity. Last but not least, the development of key tumoral tyrosine kinase inhibitors and their association with anti-CD20 mAb is a work in progress with promising results.
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Affiliation(s)
- Cristina Bagacean
- Research Unit INSERM ESPRI, ERI29/EA2216 Immunotherapy & B Cell Diseases, Réseau épigénétique et Réseau canaux ioniques du Cancéropôle Grand Ouest, Labex IGO, European University of Brittany, Brest, France.,'Iuliu Hatieganu' University of Medicine & Pharmacy, 8 Babes Street, 400012, Cluj-Napoca, Romania
| | - Mihnea Zdrenghea
- 'Iuliu Hatieganu' University of Medicine & Pharmacy, 8 Babes Street, 400012, Cluj-Napoca, Romania.,'Ion Chiricuta' Institute of Oncology, 34-36 Republicii Street, 400015 Cluj-Napoca, Romania
| | - Adrian Tempescul
- Research Unit INSERM ESPRI, ERI29/EA2216 Immunotherapy & B Cell Diseases, Réseau épigénétique et Réseau canaux ioniques du Cancéropôle Grand Ouest, Labex IGO, European University of Brittany, Brest, France.,Department of Hematology, CHRU Morvan, Brest, France
| | - Victor Cristea
- 'Iuliu Hatieganu' University of Medicine & Pharmacy, 8 Babes Street, 400012, Cluj-Napoca, Romania
| | - Yves Renaudineau
- Research Unit INSERM ESPRI, ERI29/EA2216 Immunotherapy & B Cell Diseases, Réseau épigénétique et Réseau canaux ioniques du Cancéropôle Grand Ouest, Labex IGO, European University of Brittany, Brest, France.,Laboratory of Immunology & Immunotherapy, CHRU Morvan, Brest, France
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49
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Arlauckas SP, Garris CS, Kohler RH, Kitaoka M, Cuccarese MF, Yang KS, Miller MA, Carlson JC, Freeman GJ, Anthony RM, Weissleder R, Pittet MJ. In vivo imaging reveals a tumor-associated macrophage-mediated resistance pathway in anti-PD-1 therapy. Sci Transl Med 2017. [PMID: 28490665 DOI: 10.1126/scitranslmed.aal3604.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Monoclonal antibodies (mAbs) targeting the immune checkpoint anti-programmed cell death protein 1 (aPD-1) have demonstrated impressive benefits for the treatment of some cancers; however, these drugs are not always effective, and we still have a limited understanding of the mechanisms that contribute to their efficacy or lack thereof. We used in vivo imaging to uncover the fate and activity of aPD-1 mAbs in real time and at subcellular resolution in mice. We show that aPD-1 mAbs effectively bind PD-1+ tumor-infiltrating CD8+ T cells at early time points after administration. However, this engagement is transient, and aPD-1 mAbs are captured within minutes from the T cell surface by PD-1- tumor-associated macrophages. We further show that macrophage accrual of aPD-1 mAbs depends both on the drug's Fc domain glycan and on Fcγ receptors (FcγRs) expressed by host myeloid cells and extend these findings to the human setting. Finally, we demonstrate that in vivo blockade of FcγRs before aPD-1 mAb administration substantially prolongs aPD-1 mAb binding to tumor-infiltrating CD8+ T cells and enhances immunotherapy-induced tumor regression in mice. These investigations yield insight into aPD-1 target engagement in vivo and identify specific Fc/FcγR interactions that can be modulated to improve checkpoint blockade therapy.
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Affiliation(s)
- Sean P Arlauckas
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Radiology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA
| | - Christopher S Garris
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Graduate Program in Immunology, Harvard Medical School, Boston, MA 02115, USA
| | - Rainer H Kohler
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Maya Kitaoka
- Center for Immunology and Infectious Disease, Massachusetts General Hospital, 149 8th Street, Charlestown, MA 02129, USA
| | - Michael F Cuccarese
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Katherine S Yang
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Miles A Miller
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Radiology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Jonathan C Carlson
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
| | - Gordon J Freeman
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Robert M Anthony
- Center for Immunology and Infectious Disease, Massachusetts General Hospital, 149 8th Street, Charlestown, MA 02129, USA
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Radiology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA.,Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA
| | - Mikael J Pittet
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA. .,Department of Radiology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA 02114, USA
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50
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Tomita A. Genetic and Epigenetic Modulation of CD20 Expression in B-Cell Malignancies: Molecular Mechanisms and Significance to Rituximab Resistance. J Clin Exp Hematop 2017; 56:89-99. [PMID: 27980307 DOI: 10.3960/jslrt.56.89] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
CD20 is a differentiation related cell surface phosphoprotein that is expressed during early pre-B cell stages until plasma cell differentiation, and is a suitable molecular target for B-cell malignancies by monoclonal antibodies such as rituximab, ofatumumab, obinutuzumab and others. CD20 expression is confirmed in most B-cell malignancies; however, the protein expression level varies in each patient, even in de novo tumors, and down-modulation of CD20 expression after chemoimmunotherapy with rituximab, resulting in rituximab resistance, has been recognized in the clinical setting. Recent reports suggest that genetic and epigenetic mechanisms are correlated with aberrantly low CD20 expression in de novo tumors and relapsed/refractory disease after using rituximab. Furthermore, some targeting drugs, such as lenalidomide, bortezomib and ibrutinib, directly or indirectly affect CD20 protein expression. CD20-negative phenotypically-changed DLBCL after rituximab use tends to show an aggressive clinical course and poor outcome with resistance to not only rituximab, but also conventional salvage chemo-regimens. Understanding of the mechanisms of CD20-negative phenotype may contribute to establish strategies for overcoming chemo-refractory B-cell malignancies. In this manuscript, recent progress of research on molecular and clinical features of CD20 protein and CD20-negative B-cell malignancies was reviewed.
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Affiliation(s)
- Akihiro Tomita
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine
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