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Yu F, Gao Y, Wu Y, Dai A, Wang X, Zhang X, Liu G, Xu Q, Chen D. Combination of a Novel Fusion Protein CD3εζ28 and Bispecific T Cell Engager Enhances the Persistance and Anti-Cancer Effects of T Cells. Cancers (Basel) 2022; 14:cancers14194947. [PMID: 36230871 PMCID: PMC9563022 DOI: 10.3390/cancers14194947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/27/2022] [Accepted: 10/04/2022] [Indexed: 11/16/2022] Open
Abstract
Bi-specific T cell engager (BiTE), an artificial bi-functional fusion protein, has shown promising therapeutic potential in preclinical and clinical studies. However, T cells cannot be sufficiently activated by BiTE, most likely due to lacking co-stimulatory signal. We reasoned that incorporating co-stimulatory signal might have the potential to enhance the T cell activation mediated by BiTE. We, therefore, designed a chimeric fusion protein, named as CD3εζ28, which consists of the CD3ε extracellular region, the CD28 costimulatory signal and the intracellular region of CD3ζ in tandem. T cells genetically modified to express both CD3εζ28 and GFP (T-CD3εζ28-GFP) were generated by retroviral transduction. The results from in vitro experiments showed that T-CD3εζCD28-GFP cells had superior cytotoxic effects on tumor cells in presence of BiTE compared with control T cells, as evidenced by IL-2 and IFN-γ production, T cell proliferation and sequential killing assay. In vivo, T-CD3εζCD28-GFP cells showed superior anti-tumor effects in Hela-BiTE. EGFRvIII xenograft tumor model, as evaluated by tumor growth rate and T cell persistence in comparison with control T cells. In order to further confirm these findings, we generated T cells modified to express both CD3εζCD28 on cell surface and BiTE.CD19 by autocrine manner (T-CD3εζCD28-BiTE.19). The superior anti-tumor effects of T-CD3εζCD28-BiTE.19 cells could also be evidenced by the similar in vitro and in vivo experiments; thus, incorporating co-stimulatory signal may be an effective approach to improve the effector function of T cells mediated by BiTE.
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Affiliation(s)
- Feng Yu
- School of Life Science, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
| | - Yang Gao
- School of Life Science, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
| | - Yan Wu
- School of Life Science, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
| | - Anran Dai
- School of Life Science, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
| | - Xiaoyan Wang
- Department of Gastroenterology, The Affiliated Suqian First People’s Hospital of Nanjing Medical University, Suqian 223812, China
| | - Xiangzhi Zhang
- School of Life Science, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
| | - Guodong Liu
- Department of Gastroenterology, The Affiliated Suqian First People’s Hospital of Nanjing Medical University, Suqian 223812, China
| | - Qinggang Xu
- School of Life Science, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
| | - Dongfeng Chen
- School of Life Science, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
- Correspondence: ; Tel.: +86-15951288195
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Kanamaru Y, Tamouza H, Pfirsch S, El-Mehdi D, Guérin-Marchand C, Pretolani M, Blank U, Monteiro RC. IgA Fc receptor I signals apoptosis through the FcRγ ITAM and affects tumor growth. Blood 2006; 109:203-11. [PMID: 16990604 DOI: 10.1182/blood-2006-06-025882] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Abstract
The IgA Fc receptor (FcαRI) has dual proinflammatory and anti-inflammatory functions that are transmitted through the immunoreceptor tyrosine-based activation motifs (ITAMs) of the associated FcRγ subunit. Whereas the involvement of FcαRI in inflammation is well documented, little is known of its anti-inflammatory mechanisms. Here we show that monomeric targeting of FcαRI by anti-FcαRI Fab or serum IgA triggers apoptosis in human monocytes, monocytic cell lines, and FcαRI+ transfectants. However, the physiologic ligand IgA induced apoptosis only when cells were cultured in low serum conditions, indicating differences with induction of anti-inflammatory signaling. Apoptosis signaling required the FcRγ ITAM, as cells transfected with FcαRI or with a chimeric FcαRI-FcRγ responded to death-activating signals, whereas cells expressing a mutated FcαRIR209L unable to associate with FcRγ, or an ITAM-mutated chimeric FcαRI-FcRγ, did not respond. FcαRI-mediated apoptosis signals were blocked by treatment with the pan-caspase inhibitor zVAD-fmk, involved proteolysis of procaspase-3, and correlated negatively with SHP-1 concentration. Anti-FcαRI Fab treatment of nude mice injected subcutaneously with FcαRI+ mast-cell transfectants prevented tumor development and halted the growth of established tumors. These findings demonstrate that, on monomeric targeting, FcαRI functions as an FcRγ ITAM-dependent apoptotic module that may be fundamental for controlling inflammation and tumor growth.
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MESH Headings
- Amino Acid Chloromethyl Ketones/pharmacology
- Amino Acid Motifs
- Animals
- Antigens, CD/chemistry
- Antigens, CD/genetics
- Antigens, CD/physiology
- Apoptosis/physiology
- Caspase 3/metabolism
- Cell Line, Tumor
- Cells, Cultured
- Culture Media, Serum-Free
- Cysteine Proteinase Inhibitors/pharmacology
- Enzyme Activation
- Female
- Humans
- Immunoglobulin A/immunology
- Immunoglobulin Fab Fragments/pharmacology
- Inflammation/immunology
- Inflammation/pathology
- Leukemia, Basophilic, Acute/pathology
- Leukemia, Basophilic, Acute/therapy
- Mast Cells/physiology
- Mast Cells/transplantation
- Mice
- Mice, Inbred C57BL
- Mice, Nude
- Mice, Transgenic
- Neoplasms/pathology
- Protein Tyrosine Phosphatase, Non-Receptor Type 6/antagonists & inhibitors
- Protein Tyrosine Phosphatase, Non-Receptor Type 6/genetics
- Protein Tyrosine Phosphatase, Non-Receptor Type 6/physiology
- RNA, Small Interfering/pharmacology
- Rats
- Receptors, Fc/chemistry
- Receptors, Fc/genetics
- Receptors, Fc/physiology
- Receptors, IgG/physiology
- Recombinant Fusion Proteins/physiology
- Skin Transplantation
- Transfection
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Affiliation(s)
- Yutaka Kanamaru
- Institut National de la Santé et de la Recherche Médicale (INSERM) U699, Paris, France
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