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Yan Z, Wang C, Wu J, Wang J, Ma T. TIM-3 teams up with PD-1 in cancer immunotherapy: mechanisms and perspectives. MOLECULAR BIOMEDICINE 2025; 6:27. [PMID: 40332725 PMCID: PMC12058639 DOI: 10.1186/s43556-025-00267-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2024] [Revised: 04/13/2025] [Accepted: 04/18/2025] [Indexed: 05/08/2025] Open
Abstract
Immunotherapy using immune checkpoint inhibitors (ICIs) has become a prominent strategy for cancer treatment over the past ten years. However, the efficacy of ICIs remains limited, with certain cancers exhibiting resistance to these therapeutic approaches. Consequently, several immune checkpoint proteins are presently being thoroughly screened and assessed in both preclinical and clinical studies. Among these candidates, T cell immunoglobulin and mucin-domain containing-3 (TIM-3) is considered a promising target. TIM-3 exhibits multiple immunosuppressive effects on various types of immune cells. Given its differential expression levels at distinct stages of T cell dysfunction in the tumor microenvironment (TME), TIM-3, along with programmed cell death protein 1 (PD-1), serves as indicators of T cell exhaustion. Moreover, it is crucial to carefully evaluate the impact of TIM-3 and PD-1 expression in cancer cells on the efficacy of immunotherapy. To increase the effectiveness of anti-TIM-3 and anti-PD-1 therapies, it is proposed to combine the inhibition of TIM-3, PD-1, and programmed death-ligand 1 (PD-L1). The efficacy of TIM-3 inhibition in conjunction with PD-1/PD-L1 inhibitors is being evaluated in a number of ongoing clinical trials for patients with various cancers. This study systematically investigates the fundamental biology of TIM-3 and PD-1, as well as the detailed mechanisms through which TIM-3 and PD-1/PD-L1 axis contribute to cancer immune evasion. Additionally, this article provides a thorough analysis of ongoing clinical trials evaluating the synergistic effects of combining PD-1/PD-L1 and TIM-3 inhibitors in anti-cancer treatment, along with an overview of the current status of TIM-3 and PD-1 antibodies.
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Affiliation(s)
- Zhuohong Yan
- Department of Cancer Research Center, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing, 101149, China
| | - Chunmao Wang
- Department of Thoracic Surgery, Beijing Chest Hospital, Capital Medical University, Beijing, 101149, China
| | - Jinghong Wu
- Department of Cancer Research Center, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing, 101149, China
| | - Jinghui Wang
- Department of Cancer Research Center, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing, 101149, China
| | - Teng Ma
- Department of Cancer Research Center, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing, 101149, China.
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Kiani A, Pierotti CL, Schedel F, Kokot T, Weyershaeuser J, Brehm M, Rios P, Fehrenbach K, Warscheid B, Minguet S, Schamel WW, Köhn M. Development of a Peptide Inhibitor Targeting the C-SH2 Domain of the SHP2 Phosphatase. Chembiochem 2025:e2400938. [PMID: 40318117 DOI: 10.1002/cbic.202400938] [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: 04/27/2025] [Revised: 05/02/2025] [Accepted: 05/02/2025] [Indexed: 05/07/2025]
Abstract
Src homology 2 (SH2) domain-containing phosphatase 2 (SHP2) mediates important signal transduction upon cell surface receptor stimulation, regulating multiple cellular functions. In addition to the catalytically active phosphotyrosine (pTyr) phosphatase domain, SHP2 contains two regulatory pTyr-binding domains: the N-SH2 and C-SH2 domains. While the role of the N-SH2 domain is well understood, the role of the C-SH2 domain is less clear. To support studies on the involvement of the domains in SHP2 function, herein, the development of a peptide inhibitor containing a nonhydrolysable pTyr mimetic, which selectively binds to the C-SH2 domain of SHP2 and blocks its protein-protein interactions, is described. Incorporation of the pTyr mimetic l-O-malonyltyrosine (l-OMT) results in robust binding affinity to the C-SH2 domain, while the widely used pTyr mimetic phosphonodifluoromethyl phenylalanine (F2Pmp) abolishes binding, showing that this mimetic is not a general binder of SH2 domains, which challenges existing notions. The C-SH2 inhibitor peptide (CSIP) is stable, selective, cell permeable, and noncytotoxic. CSIP enriches the toolbox of inhibitors with different modes of action targeting SHP2, and will support studies to better understand SHP2 regulation and interactions, which can ultimately inform new drug discovery efforts.
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Affiliation(s)
- Azin Kiani
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Faculty of Chemistry and Pharmacy, Hermann-Staudinger Graduate School, University of Freiburg, Hebelstraße 27, 79087, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
| | - Catia L Pierotti
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
- Institute for Cell Biology, Department of Molecular Cell Biology, University of Bonn, Käthe-Kümmel-Straße 1, 53115, Bonn, Germany
| | - Franziska Schedel
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Faculty of Chemistry and Pharmacy, Hermann-Staudinger Graduate School, University of Freiburg, Hebelstraße 27, 79087, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
- Institute for Cell Biology, Department of Molecular Cell Biology, University of Bonn, Käthe-Kümmel-Straße 1, 53115, Bonn, Germany
- Spemann Graduate School of Biology and Medicine, University of Freiburg, Albertstraße 19A, 79104, Freiburg im Breisgau, Germany
| | - Thomas Kokot
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
| | - Judith Weyershaeuser
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
| | - Mario Brehm
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
| | - Pablo Rios
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
| | - Kerstin Fehrenbach
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
| | - Bettina Warscheid
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Biochemistry II, Theodor-Boveri-Institute, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Susana Minguet
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
- Centre of Chronic Immunodeficiency CCI, University Clinics and Medical Faculty, Breisacher Straße 115, 79106, Freiburg im Breisgau, Germany
| | - Wolfgang W Schamel
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
- Centre of Chronic Immunodeficiency CCI, University Clinics and Medical Faculty, Breisacher Straße 115, 79106, Freiburg im Breisgau, Germany
| | - Maja Köhn
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104, Freiburg im Breisgau, Germany
- Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestraße 1, 79104, Freiburg im Breisgau, Germany
- Institute for Cell Biology, Department of Molecular Cell Biology, University of Bonn, Käthe-Kümmel-Straße 1, 53115, Bonn, Germany
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Ouyang L, Gao X, Yang R, Zhou P, Cai H, Tian Y, Wang H, Kong S, Lu Z. SHP2 regulates the HIF-1 signaling pathway in the decidual human endometrial stromal cells†. Biol Reprod 2025; 112:743-753. [PMID: 39893623 DOI: 10.1093/biolre/ioaf019] [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: 09/13/2024] [Revised: 01/02/2025] [Accepted: 01/30/2025] [Indexed: 02/04/2025] Open
Abstract
The decidual endometrial stromal cells play a critical role in the establishment of uterine receptivity and pregnancy in human. Our previous studies demonstrate that protein tyrosine phosphatase 2 SHP2 is highly expressed in decidualized cells and governs the decidualization progress. However, the role and mechanism of SHP2 in the function of decidual cells remain unclear. Here, we screened proteins interacting with SHP2 in decidual hTERT-immortalized human endometrial stromal cells (T-HESCs) and identified Hypoxia-inducible factor-1 (HIF-1) signaling pathway as a potential SHP2-mediated signaling pathway through proximity-dependent biotinylation (BioID) analysis. Immunoprecipitation (Co-IP) revealed an interaction between SHP2 and HIF-1α, which colocalized to the nucleus in decidual cells. Furthermore, the SHP2 expression correlated with the transcriptional activation of HIF-1α and its downstream genes Beta-enolase (Eno3), Pyruvate kinase 2 (Pkm2), Aldolase C (Aldoc), and Facilitative glucose transporter 1 (Glut1). Knockdown or inhibition of SHP2 significantly reduced the mRNA and protein levels of HIF-1α and its downstream genes, as well as lactate production in decidual cells. We also established a hypoxia model of T-HESCs and 293 T cells and found that hypoxic treatment induced the expression of SHP2 and HIF-1α, which colocalized in the nucleus. SHP2 forced-expression rescued the inhibitory effects of SHP2 deficiency on HIF-1α expression and lactate production. Finally, SHP2 binds to the promoter regions of HIF-1α and its target genes (Eno3, Pkm2, Aldoc, and Glut1). Collectively, our results suggest that SHP2 influences the function of decidual cells by HIF-1α signaling and provide a novel function mechanism of decidual stromal cells.
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Affiliation(s)
- Liqun Ouyang
- Xiamen City Key Laboratory of Metabolism, School of Pharmaceutical Sciences, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
| | - Xia Gao
- Xiamen City Key Laboratory of Metabolism, School of Pharmaceutical Sciences, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
| | - Rongyu Yang
- Xiamen City Key Laboratory of Metabolism, School of Pharmaceutical Sciences, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
| | - Peiyi Zhou
- Xiamen City Key Laboratory of Metabolism, School of Pharmaceutical Sciences, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
| | - Han Cai
- Reproductive Medical Centre, The First Affiliated Hospital of Xiamen University, Zhenhai Road, Xiamen, Fujian 361005, China
- Fujian Provincial Key Laboratory of Reproductive Health Research, Medical College of Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
| | - Yingpu Tian
- Xiamen City Key Laboratory of Metabolism, School of Pharmaceutical Sciences, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
| | - Haibin Wang
- Reproductive Medical Centre, The First Affiliated Hospital of Xiamen University, Zhenhai Road, Xiamen, Fujian 361005, China
- Fujian Provincial Key Laboratory of Reproductive Health Research, Medical College of Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
| | - Shuangbo Kong
- Reproductive Medical Centre, The First Affiliated Hospital of Xiamen University, Zhenhai Road, Xiamen, Fujian 361005, China
- Fujian Provincial Key Laboratory of Reproductive Health Research, Medical College of Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
| | - Zhongxian Lu
- Xiamen City Key Laboratory of Metabolism, School of Pharmaceutical Sciences, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
- Fujian Provincial Key Laboratory of Reproductive Health Research, Medical College of Xiamen University, Xiangan South Road, Xiamen, Fujian 361102, China
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Pulica R, Aquib A, Varsanyi C, Gadiyar V, Wang Z, Frederick T, Calianese DC, Patel B, de Dios KV, Poalasin V, De Lorenzo MS, Kotenko SV, Wu Y, Yang A, Choudhary A, Sriram G, Birge RB. Dys-regulated phosphatidylserine externalization as a cell intrinsic immune escape mechanism in cancer. Cell Commun Signal 2025; 23:131. [PMID: 40069722 PMCID: PMC11900106 DOI: 10.1186/s12964-025-02090-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2024] [Accepted: 02/07/2025] [Indexed: 03/14/2025] Open
Abstract
The negatively charged aminophospholipid, phosphatidylserine (PS), is typically restricted to the inner leaflet of the plasma membrane under normal, healthy physiological conditions. PS is irreversibly externalized during apoptosis, where it serves as a signal for elimination by efferocytosis. PS is also reversibly and transiently externalized during cell activation such as platelet and immune cell activation. These events associated with physiological PS externalization are tightly controlled by the regulated activation of flippases and scramblases. Indeed, improper regulation of PS externalization results in thrombotic diseases such as Scott Syndrome, a defect in coagulation and thrombin production, and in the case of efferocytosis, can result in autoimmunity such as systemic lupus erythematosus (SLE) when PS-mediated apoptosis and efferocytosis fails. The physiological regulation of PS is also perturbed in cancer and during viral infection, whereby PS becomes persistently exposed on the surface of such stressed and diseased cells, which can lead to chronic thrombosis and chronic immune evasion. In this review, we summarize evidence for the dysregulation of PS with a main focus on cancer biology and the pathogenic mechanisms for immune evasion and signaling by PS, as well as the discussion of new therapeutic strategies aimed to target externalized PS. We posit that chronic PS externalization is a universal and agnostic marker for diseased tissues, and in cancer, likely reflects a cell intrinsic form of immune escape. The continued development of new therapeutic strategies for targeting PS also provides rationale for their co-utility as adjuvants and with immune checkpoint therapeutics.
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Affiliation(s)
- Rachael Pulica
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Ahmed Aquib
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Christopher Varsanyi
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Varsha Gadiyar
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Ziren Wang
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Trevor Frederick
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - David C Calianese
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Bhumik Patel
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Kenneth Vergel de Dios
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Victor Poalasin
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Mariana S De Lorenzo
- Department of Cell Biology and Molecular Medicine, 185 South Orange Ave, Newark, NJ, 07103, USA
| | - Sergei V Kotenko
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA
| | - Yi Wu
- Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Cyrus Tang Medical Institute, Soochow University, Suzhou, China
| | - Aizen Yang
- Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Prevention, Cyrus Tang Medical Institute, Soochow University, Suzhou, China
| | - Alok Choudhary
- International Center for Public Health, Public Health Research Institute, Newark, NJ, 07103, USA
| | - Ganapathy Sriram
- Department Biological, Chemical and Environmental Sciences, Wheaton College, 26 E Main St, Norton, MA, 02766, USA
| | - Raymond B Birge
- Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ, 07103, USA.
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Berankova M, Holoubek J, Hönig V, Matusova Z, Palus M, Salat J, Krayem I, Vojtiskova J, Svoboda P, Pranclova V, Valihrach L, Demant P, Lipoldova M, Ruzek D. Genotype-driven sensitivity of mice to tick-borne encephalitis virus correlates with differential host responses in peripheral macrophages and brain. J Neuroinflammation 2025; 22:22. [PMID: 39875898 PMCID: PMC11776336 DOI: 10.1186/s12974-025-03354-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2024] [Accepted: 01/23/2025] [Indexed: 01/30/2025] Open
Abstract
BACKGROUND Tick-borne encephalitis (TBE) is the most common tick-borne viral infection in Eurasia. Outcomes range from asymptomatic infection to fatal encephalitis, with host genetics likely playing a role. BALB/c mice have intermediate susceptibility to TBE virus (TBEV) and STS mice are highly resistant, whereas the recombinant congenic strain CcS-11, which carries 12.5% of the STS genome on the BALB/c background, is more susceptible than BALB/c mice. In the present study, we employed these genetically distinct mouse models to investigate the host response to TBEV infection in both peripheral macrophages, one of the initial target cell populations, and the brain, the terminal target organ of the virus. METHODS TBEV growth and the production of key cytokines and chemokines were measured and compared in macrophages derived from BALB/c, CcS-11, and STS mice. In addition, brains from these TBEV-infected mouse strains underwent in-depth transcriptomic analysis. RESULTS Virus production in BALB/c and CcS-11 macrophages exhibited similar kinetics 24 and 48 h post-infection (hpi), but CcS-11 macrophages yielded significantly higher titers 72 hpi. Macrophages from both sensitive strains demonstrated elevated chemokine and proinflammatory cytokine production upon infection, whereas the resistant strain, STS, showed no cytokine/chemokine activation. Transcriptomic analysis of brain tissue demonstrated that the genetic background of the mouse strains dictated their transcriptional response to infection. The resistant strain exhibited a more robust cell-mediated immune response, whereas both sensitive strains showed a less effective cell-mediated response but increased cytokine signaling and signs of demyelination, with loss of oligodendrocytes. CONCLUSIONS Our findings suggest that variations in susceptibility linked to host genetic background correspond with distinct host responses, both in the periphery upon virus entry into the organism and in the brain, the target organ of the virus. These results provide insights into the influence of host genetics on the clinical trajectory of TBE.
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Affiliation(s)
- Michaela Berankova
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, Brno, Czech Republic
| | - Jiri Holoubek
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, Brno, Czech Republic
| | - Vaclav Hönig
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, Brno, Czech Republic
| | - Zuzana Matusova
- Laboratory of Gene Expression, Institute of Biotechnology of the Czech Academy of Sciences, Vestec, Czech Republic
- Faculty of Science, Charles University, Prague, Czech Republic
| | - Martin Palus
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, Brno, Czech Republic
| | - Jiri Salat
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, Brno, Czech Republic
| | - Imtissal Krayem
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Czech Academy of Sciences, Prague, Czech Republic
| | - Jarmila Vojtiskova
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Czech Academy of Sciences, Prague, Czech Republic
| | - Pavel Svoboda
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, Brno, Czech Republic
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czechia
| | - Veronika Pranclova
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
- Faculty of Science, University of South Bohemia, Ceske Budejovice, Czech Republic
| | - Lukas Valihrach
- Laboratory of Gene Expression, Institute of Biotechnology of the Czech Academy of Sciences, Vestec, Czech Republic
- Department of Cellular Neurophysiology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Peter Demant
- Department of Molecular and Cellular Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Marie Lipoldova
- Laboratory of Molecular and Cellular Immunology, Institute of Molecular Genetics, Czech Academy of Sciences, Prague, Czech Republic
- Department of Medical Genetics, Faculty of Medicine, Charles University, 3rd, Prague, Czech Republic
| | - Daniel Ruzek
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
- Laboratory of Arbovirology, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic.
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, Brno, Czech Republic.
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Sun J, Tian Y, Yang C. Target therapy of TIGIT; a novel approach of immunotherapy for the treatment of colorectal cancer. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2025; 398:231-241. [PMID: 39158733 DOI: 10.1007/s00210-024-03346-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Accepted: 07/30/2024] [Indexed: 08/20/2024]
Abstract
The T cell immunoglobulin and immunoreceptor tyrosine-based inhibitory motif domain (TIGIT), a newly discovered checkpoint, is characterized by its elevated expression on CD4 + T cells, CD8 + T cells, natural killer (NK) cells, regulatory T cells (Tregs), and tumor-infiltrating lymphocytes (TILs). Research to date has been shown that TIGIT has been linked to exhaustion of NK cell both and T cells in numerous cancers. CD155, being the specific ligand of TIGIT in humans, emerges as a key target for immunotherapy owing to its crucial interaction with TIGIT. Furthermore, numerous studies have demonstrated that the combination of TIGIT with other immune checkpoint inhibitors (ICIs) and/or traditional treatments elicits a potent antitumor response in colorectal cancer (CRC). This review provides an overview of the structure, function, and signaling pathways associated with TIGIT across multiple immune system cell types. Additionally, focusing on the role of TIGIT in the progression of CRC, this study reviewed various studies exploring TIGIT-based immunotherapy in CRC.
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Affiliation(s)
- Jing Sun
- Department of Gastroenterology, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, 046000, China
| | - Yan Tian
- Department of Gastroenterology, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, 046000, China
| | - Changqing Yang
- Department of Gastroenterology, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, 046000, China.
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Salminen A. Inhibitory immune checkpoints suppress the surveillance of senescent cells promoting their accumulation with aging and in age-related diseases. Biogerontology 2024; 25:749-773. [PMID: 38954358 PMCID: PMC11374851 DOI: 10.1007/s10522-024-10114-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 06/18/2024] [Indexed: 07/04/2024]
Abstract
The accumulation of pro-inflammatory senescent cells within tissues is a common hallmark of the aging process and many age-related diseases. This modification has been called the senescence-associated secretory phenotype (SASP) and observed in cultured cells and in cells isolated from aged tissues. Currently, there is a debate whether the accumulation of senescent cells within tissues should be attributed to increased generation of senescent cells or to a defect in their elimination from aging tissues. Emerging studies have revealed that senescent cells display an increased expression of several inhibitory immune checkpoint ligands, especially those of the programmed cell death protein-1 (PD-1) ligand-1 (PD-L1) proteins. It is known that the PD-L1 ligands, especially those of cancer cells, target the PD-1 receptor of cytotoxic CD8+ T and natural killer (NK) cells disturbing their functions, e.g., evoking a decline in their cytotoxic activity and promoting their exhaustion and even apoptosis. An increase in the level of the PD-L1 protein in senescent cells was able to suppress their immune surveillance and inhibit their elimination by cytotoxic CD8+ T and NK cells. Senescent cells are known to express ligands for several inhibitory immune checkpoint receptors, i.e., PD-1, LILRB4, NKG2A, TIM-3, and SIRPα receptors. Here, I will briefly describe those pathways and examine whether these inhibitory checkpoints could be involved in the immune evasion of senescent cells with aging and age-related diseases. It seems plausible that an enhanced inhibitory checkpoint signaling can prevent the elimination of senescent cells from tissues and thus promote the aging process.
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Affiliation(s)
- Antero Salminen
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, 70211, Kuopio, Finland.
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8
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Zhong JC, Lerrer S, Mor A. An Imaging-Based Assay to Measure the Location of PD-1 at the Immune Synapse for Testing the Binding Efficacy of Anti-PD-1 and Anti-PD-L1 Antibodies. Bio Protoc 2024; 14:e5057. [PMID: 39282229 PMCID: PMC11393042 DOI: 10.21769/bioprotoc.5057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 07/14/2024] [Accepted: 07/25/2024] [Indexed: 09/18/2024] Open
Abstract
PD-1 is an immune checkpoint on T cells. Antibodies to PD-1 or its ligand PD-L1 are gaining popularity as a leading immunotherapy approach. In the US, 40% of all cancer patients will be treated with anti-PD-1 or anti-PD-L1 antibodies but, unfortunately, only 30% will respond, and many will develop immune-related adverse events. There are nine FDA-approved anti-PD-1/PD-L1 antibodies, and approximately 100 are in different stages of clinical development. It is a clinical challenge to choose the correct antibody for a given patient, and this is critical in advanced malignancies, which often do not permit a second-line intervention. To resolve that, an in vitro assay to compare the performance of the different anti-PD-1/PD-L1 antibodies is not only a critical tool for research purposes but also a possible tool for personalized medicine. There are some assays describing the binding affinity and function of anti-PD-1/PD-L1 antibodies. However, a significant limitation of existing assays is that they need to consider the location of PD-1 in the immune synapse, the interface between the T cell and tumor cells, and, therefore, ignore a critical component in its biology. To address this, we developed and validated an imaging-based assay to quantify and compare the ability of different anti-PD-1/PD-L1 antibodies to remove PD-1 from the immune synapse. We correlated that with the same antibodies' ability to increase cytokine secretion from the targeted cells. The strong correlation between PD-1 location and its function in vitro and in vivo within the antibody treatment setting validates this assay's usability, which is easily recordable and straightforward. Key features • Live-cell imaging quantifies and compares how anti-PD-1 and anti-PD-L1 antibodies disrupt PD-1 localization, causing the removal of PD-1 during immune synapse formation. • Hao et al. [1] validated the protocol, and the findings were extended to a live confocal microscopy method. • It requires a Zeiss LSM 900 confocal microscope and appropriate imaging software and is optimized for the latest version of Zen Blue. • Anti-PD-1 antibodies are commonly used in cancer therapies, and this protocol optimizes the analysis of their effectiveness.
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Affiliation(s)
- Justin C. Zhong
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, NY, USA
- John Hopkins University, Department of Biology, Baltimore, MD, USA
| | - Shalom Lerrer
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, NY, USA
| | - Adam Mor
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, NY, USA
- Division of Rheumatology, Department of Medicine, Columbia University Medical Center, New York, NY, USA
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9
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Ma C, Kang D, Gao P, Zhang W, Wu X, Xu Z, Han H, Zhang L, Cai Y, Wang Y, Wang Y, Long W. Discovery of JAB-3312, a Potent SHP2 Allosteric Inhibitor for Cancer Treatment. J Med Chem 2024; 67:13534-13549. [PMID: 39110625 DOI: 10.1021/acs.jmedchem.4c00360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
As an oncogenic phosphatase, SHP2 acts as a converging node in the RTK-RAS-MAPK signaling pathway in cancer cells and suppresses antitumor immunity by passing signals downstream of PD-1. Here, we utilized the extra druggable pocket outside the previously identified SHP2 allosteric tunnel site by the (6,5 fused), 6 spirocyclic system. The optimized compound, JAB-3312, exhibited a SHP2 binding Kd of 0.37 nM, SHP2 enzymatic IC50 of 1.9 nM, KYSE-520 antiproliferative IC50 of 7.4 nM and p-ERK inhibitory IC50 of 0.23 nM. For JAB-3312, an oral dose of 1.0 mg/kg QD was sufficient to achieve 95% TGI in KYSE-520 xenograft model of mouse. JAB-3312 was well-tolerated in animal models, and a close correlation was observed between the plasma concentration of JAB-3312 and the p-ERK inhibition in tumors. Currently, JAB-3312 is undergoing clinical trials as a potential anticancer agent.
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Affiliation(s)
- Cunbo Ma
- Medicinal Chemistry, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Di Kang
- Pharmacology, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Panliang Gao
- Medicinal Chemistry, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Wei Zhang
- Hits Discovery, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Xinping Wu
- Medicinal Chemistry, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Zilong Xu
- Medicinal Chemistry, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Huifeng Han
- Pharmacology, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Lei Zhang
- Pharmacology, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Yang Cai
- Pharmacology, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Yanping Wang
- Pharmacology, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Yinxiang Wang
- Pharmacology, Jacobio Pharmaceuticals, Beijing 101111, China
| | - Wei Long
- Medicinal Chemistry, Jacobio Pharmaceuticals, Beijing 101111, China
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10
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Arifin MZ, Leitner J, Egan D, Waidhofer-Söllner P, Kolch W, Zhernovkov V, Steinberger P. BTLA and PD-1 signals attenuate TCR-mediated transcriptomic changes. iScience 2024; 27:110253. [PMID: 39021788 PMCID: PMC11253514 DOI: 10.1016/j.isci.2024.110253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 04/29/2024] [Accepted: 06/10/2024] [Indexed: 07/20/2024] Open
Abstract
T cell co-inhibitory immune checkpoints, such as PD-1 or BTLA, are bona fide targets in cancer therapy. We used a human T cell reporter line to measure transcriptomic changes mediated by PD-1- and BTLA-induced signaling. T cell receptor (TCR)-complex stimulation resulted in the upregulation of a large number of genes but also in repression of a similar number of genes. PD-1 and BTLA signals attenuated transcriptomic changes mediated by TCR-complex signaling: upregulated genes tended to be suppressed and the expression of a significant number of downregulated genes was higher during PD-1 or BTLA signaling. BTLA was a significantly stronger attenuator of TCR-complex-induced transcriptome changes than PD-1. A strong overlap between genes that were regulated indicated quantitative rather than qualitative differences between these receptors. In line with their function as attenuators of TCR-complex-mediated changes, we found strongly regulated genes to be prime targets of PD-1 and BTLA signaling.
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Affiliation(s)
- Muhammad Zainul Arifin
- Systems Biology Ireland, School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Judith Leitner
- Center for Pathophysiology, Infectiology and Immunology, Institute of Immunology, Medical University of Vienna, Vienna, Austria
| | - Donagh Egan
- Systems Biology Ireland, School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Petra Waidhofer-Söllner
- Center for Pathophysiology, Infectiology and Immunology, Institute of Immunology, Medical University of Vienna, Vienna, Austria
| | - Walter Kolch
- Systems Biology Ireland, School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland
- Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Vadim Zhernovkov
- Systems Biology Ireland, School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Peter Steinberger
- Center for Pathophysiology, Infectiology and Immunology, Institute of Immunology, Medical University of Vienna, Vienna, Austria
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11
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Morales P, Brown AJ, Sangaré LO, Yang S, Kuihon SVNP, Chen B, Saeij JPJ. The Toxoplasma secreted effector TgWIP modulates dendritic cell motility by activating host tyrosine phosphatases Shp1 and Shp2. Cell Mol Life Sci 2024; 81:294. [PMID: 38977495 PMCID: PMC11335217 DOI: 10.1007/s00018-024-05283-3] [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: 01/30/2024] [Revised: 05/07/2024] [Accepted: 05/14/2024] [Indexed: 07/10/2024]
Abstract
The obligate intracellular parasite Toxoplasma gondii causes life-threatening toxoplasmosis to immunocompromised individuals. The pathogenesis of Toxoplasma relies on its swift dissemination to the central nervous system through a 'Trojan Horse' mechanism using infected leukocytes as carriers. Previous work found TgWIP, a protein secreted from Toxoplasma, played a role in altering the actin cytoskeleton and promoting cell migration in infected dendritic cells (DCs). However, the mechanism behind these changes was unknown. Here, we report that TgWIP harbors two SH2-binding motifs that interact with tyrosine phosphatases Shp1 and Shp2, leading to phosphatase activation. DCs infected with Toxoplasma exhibited hypermigration, accompanying enhanced F-actin stress fibers and increased membrane protrusions such as filopodia and pseudopodia. By contrast, these phenotypes were abrogated in DCs infected with Toxoplasma expressing a mutant TgWIP lacking the SH2-binding motifs. We further demonstrated that the Rho-associated kinase (Rock) is involved in the induction of these phenotypes, in a TgWIP-Shp1/2 dependent manner. Collectively, the data uncover a molecular mechanism by which TgWIP modulates the migration dynamics of infected DCs in vitro.
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Affiliation(s)
- Pavel Morales
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, Davis, CA, USA
| | - Abbigale J Brown
- Roy J. Carver Department of Biochemistry, Biophysics & Molecular Biology, Iowa State University, Ames, IA, USA
| | - Lamba Omar Sangaré
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, Davis, CA, USA
| | - Sheng Yang
- Roy J. Carver Department of Biochemistry, Biophysics & Molecular Biology, Iowa State University, Ames, IA, USA
- Target & Protein Sciences, Johnson & Johnson, New Brunswick, USA
| | - Simon V N P Kuihon
- Roy J. Carver Department of Biochemistry, Biophysics & Molecular Biology, Iowa State University, Ames, IA, USA
| | - Baoyu Chen
- Roy J. Carver Department of Biochemistry, Biophysics & Molecular Biology, Iowa State University, Ames, IA, USA
| | - Jeroen P J Saeij
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, Davis, CA, USA.
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12
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Lee HJ, Hwang SJ, Jeong EH, Chang MH. Genetically Engineered CLDN18.2 CAR-T Cells Expressing Synthetic PD1/CD28 Fusion Receptors Produced Using a Lentiviral Vector. J Microbiol 2024; 62:555-568. [PMID: 38700775 PMCID: PMC11303488 DOI: 10.1007/s12275-024-00133-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/18/2024] [Accepted: 03/24/2024] [Indexed: 08/07/2024]
Abstract
This study aimed to develop synthetic Claudin18.2 (CLDN18.2) chimeric antigen receptor (CAR)-T (CAR-T) cells as a treatment for advanced gastric cancer using lentiviral vector genetic engineering technology that targets the CLDN18.2 antigen and simultaneously overcomes the immunosuppressive environment caused by programmed cell death protein 1 (PD-1). Synthetic CAR T cells are a promising approach in cancer immunotherapy but face many challenges in solid tumors. One of the major problems is immunosuppression caused by PD-1. CLDN18.2, a gastric-specific membrane protein, is considered a potential therapeutic target for gastric and other cancers. In our study, CLDN18.2 CAR was a second-generation CAR with inducible T-cell costimulatory (CD278), and CLDN18.2-PD1/CD28 CAR was a third-generation CAR, wherein the synthetic PD1/CD28 chimeric-switch receptor (CSR) was added to the second-generation CAR. In vitro, we detected the secretion levels of different cytokines and the killing ability of CAR-T cells. We found that the secretion of cytokines such as interferon-gamma (IFN-γ) and tumor necrosis factor-alpha (TNF-α) secreted by three types of CAR-T cells was increased, and the killing ability against CLDN18.2-positive GC cells was enhanced. In vivo, we established a xenograft GC model and observed the antitumor effects and off-target toxicity of CAR-T cells. These results support that synthetic anti-CLDN18.2 CAR-T cells have antitumor effect and anti-CLDN18.2-PD1/CD28 CAR could provide a promising design strategy to improve the efficacy of CAR-T cells in advanced gastric cancer.
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MESH Headings
- Animals
- Humans
- Mice
- CD28 Antigens/genetics
- CD28 Antigens/immunology
- Cell Line, Tumor
- Claudins/genetics
- Claudins/metabolism
- Cytokines/metabolism
- Genetic Engineering
- Genetic Vectors/genetics
- Immunotherapy, Adoptive/methods
- Interferon-gamma/metabolism
- Lentivirus/genetics
- Programmed Cell Death 1 Receptor/genetics
- Programmed Cell Death 1 Receptor/metabolism
- Programmed Cell Death 1 Receptor/immunology
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/immunology
- Receptors, Antigen, T-Cell/metabolism
- Receptors, Chimeric Antigen/genetics
- Receptors, Chimeric Antigen/immunology
- Stomach Neoplasms/therapy
- Stomach Neoplasms/immunology
- Stomach Neoplasms/genetics
- T-Lymphocytes/immunology
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Heon Ju Lee
- CARBio Therapeutics Co., Ltd., Cheongju, 28160, Republic of Korea.
| | - Seo Jin Hwang
- CARBio Therapeutics Co., Ltd., Cheongju, 28160, Republic of Korea
| | - Eun Hee Jeong
- CARBio Therapeutics Co., Ltd., Cheongju, 28160, Republic of Korea
| | - Mi Hee Chang
- CARBio Therapeutics Co., Ltd., Cheongju, 28160, Republic of Korea
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13
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Morales P, Brown AJ, Sangare LO, Yang S, Kuihon S, Chen B, Saeij J. The Toxoplasma secreted effector TgWIP modulates dendritic cell motility by activating host tyrosine phosphatases Shp1 and Shp2. RESEARCH SQUARE 2024:rs.3.rs-4539584. [PMID: 38978596 PMCID: PMC11230507 DOI: 10.21203/rs.3.rs-4539584/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
The obligate intracellular parasite Toxoplasma gondii causes life-threatening toxoplasmosis to immunocompromised individuals. The pathogenesis of Toxoplasma relies on its swift dissemination to the central nervous system through a 'Trojan Horse' mechanism using infected leukocytes as carriers. Previous work found TgWIP, a protein secreted from Toxoplasma, played a role in altering the actin cytoskeleton and promoting cell migration in infected dendritic cells (DCs). However, the mechanism behind these changes was unknown. Here, we report that TgWIP harbors two SH2-binding motifs that interact with tyrosine phosphatases Shp1 and Shp2, leading to phosphatase activation. DCs infected with Toxoplasma exhibited hypermigration, accompanying enhanced F-actin stress fibers and increased membrane protrusions such as filopodia and pseudopodia. By contrast, these phenotypes were abrogated in DCs infected with Toxoplasma expressing a mutant TgWIP lacking the SH2-binding motifs. We further demonstrated that the Rho-associated kinase (Rock) is involved in the induction of these phenotypes, in a TgWIP-Shp1/2 dependent manner. Collectively, the data uncover a molecular mechanism by which TgWIP modulates the migration dynamics of infected DCs in vitro.
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Affiliation(s)
| | | | | | | | | | | | - Jeroen Saeij
- University of California Davis School of Veterinary Medicine
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14
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Pagano L, Pennacchietti V, Malagrinò F, Di Felice M, Toso J, Puglisi E, Gianni S, Toto A. Folding and Binding Kinetics of the Tandem of SH2 Domains from SHP2. Int J Mol Sci 2024; 25:6566. [PMID: 38928272 PMCID: PMC11203950 DOI: 10.3390/ijms25126566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 06/07/2024] [Accepted: 06/10/2024] [Indexed: 06/28/2024] Open
Abstract
The SH2 domains of SHP2 play a crucial role in determining the function of the SHP2 protein. While the folding and binding properties of the isolated NSH2 and CSH2 domains have been extensively studied, there is limited information about the tandem SH2 domains. This study aims to elucidate the folding and binding kinetics of the NSH2-CSH2 tandem domains of SHP2 through rapid kinetic experiments, complementing existing data on the isolated domains. The results indicate that while the domains generally fold and unfold independently, acidic pH conditions induce complex scenarios involving the formation of a misfolded intermediate. Furthermore, a comparison of the binding kinetics of isolated NSH2 and CSH2 domains with the NSH2-CSH2 tandem domains, using peptides that mimic specific portions of Gab2, suggests a dynamic interplay between NSH2 and CSH2 in binding Gab2 that modulate the microscopic association rate constant of the binding reaction. These findings, discussed in the context of previous research on the NSH2 and CSH2 domains, enhance our understanding of the function of the SH2 domain tandem of SHP2.
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Affiliation(s)
- Livia Pagano
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, 00185 Rome, Italy; (L.P.); (V.P.); (M.D.F.); (J.T.); (E.P.); (S.G.)
| | - Valeria Pennacchietti
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, 00185 Rome, Italy; (L.P.); (V.P.); (M.D.F.); (J.T.); (E.P.); (S.G.)
| | - Francesca Malagrinò
- Dipartimento di Medicina Clinica, Sanità Pubblica, Scienze della Vita e Dell’ambiente, Università dell’Aquila, Piazzale Salvatore Tommasi 1, Coppito, 67010 L’Aquila, Italy;
| | - Mariana Di Felice
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, 00185 Rome, Italy; (L.P.); (V.P.); (M.D.F.); (J.T.); (E.P.); (S.G.)
| | - Julian Toso
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, 00185 Rome, Italy; (L.P.); (V.P.); (M.D.F.); (J.T.); (E.P.); (S.G.)
| | - Elena Puglisi
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, 00185 Rome, Italy; (L.P.); (V.P.); (M.D.F.); (J.T.); (E.P.); (S.G.)
| | - Stefano Gianni
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, 00185 Rome, Italy; (L.P.); (V.P.); (M.D.F.); (J.T.); (E.P.); (S.G.)
| | - Angelo Toto
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, 00185 Rome, Italy; (L.P.); (V.P.); (M.D.F.); (J.T.); (E.P.); (S.G.)
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15
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Guruprasad P, Carturan A, Zhang Y, Cho JH, Kumashie KG, Patel RP, Kim KH, Lee JS, Lee Y, Kim JH, Chung J, Joshi A, Cohen I, Shestov M, Ghilardi G, Harris J, Pajarillo R, Angelos M, Lee YG, Liu S, Rodriguez J, Wang M, Ballard HJ, Gupta A, Ugwuanyi OH, Hong SJA, Bochi-Layec AC, Sauter CT, Chen L, Paruzzo L, Kammerman S, Shestova O, Liu D, Vella LA, Schuster SJ, Svoboda J, Porazzi P, Ruella M. The BTLA-HVEM axis restricts CAR T cell efficacy in cancer. Nat Immunol 2024; 25:1020-1032. [PMID: 38831106 DOI: 10.1038/s41590-024-01847-4] [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: 05/08/2023] [Accepted: 04/17/2024] [Indexed: 06/05/2024]
Abstract
The efficacy of T cell-based immunotherapies is limited by immunosuppressive pressures in the tumor microenvironment. Here we show a predominant role for the interaction between BTLA on effector T cells and HVEM (TNFRSF14) on immunosuppressive tumor microenvironment cells, namely regulatory T cells. High BTLA expression in chimeric antigen receptor (CAR) T cells correlated with poor clinical response to treatment. Therefore, we deleted BTLA in CAR T cells and show improved tumor control and persistence in models of lymphoma and solid malignancies. Mechanistically, BTLA inhibits CAR T cells via recruitment of tyrosine phosphatases SHP-1 and SHP-2, upon trans engagement with HVEM. BTLA knockout thus promotes CAR signaling and subsequently enhances effector function. Overall, these data indicate that the BTLA-HVEM axis is a crucial immune checkpoint in CAR T cell immunotherapy and warrants the use of strategies to overcome this barrier.
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MESH Headings
- Animals
- Humans
- Mice
- Cell Line, Tumor
- Immunotherapy, Adoptive/methods
- Mice, Knockout
- Neoplasms/immunology
- Neoplasms/therapy
- Receptors, Chimeric Antigen/immunology
- Receptors, Chimeric Antigen/metabolism
- Receptors, Chimeric Antigen/genetics
- Receptors, Immunologic/metabolism
- Receptors, Immunologic/genetics
- Receptors, Tumor Necrosis Factor, Member 14/metabolism
- Receptors, Tumor Necrosis Factor, Member 14/immunology
- Receptors, Tumor Necrosis Factor, Member 14/genetics
- Signal Transduction
- T-Lymphocytes, Regulatory/immunology
- Tumor Microenvironment/immunology
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Affiliation(s)
- Puneeth Guruprasad
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Alberto Carturan
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Yunlin Zhang
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Jong Hyun Cho
- Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ, USA
| | | | - Ruchi P Patel
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Ki-Hyun Kim
- R&D Center, AbClon Inc., Seoul, Republic of Korea
| | - Jong-Seo Lee
- R&D Center, AbClon Inc., Seoul, Republic of Korea
| | - Yoon Lee
- R&D Center, AbClon Inc., Seoul, Republic of Korea
| | | | - Junho Chung
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Akshita Joshi
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Ivan Cohen
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Maksim Shestov
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Guido Ghilardi
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Jaryse Harris
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Raymone Pajarillo
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Mathew Angelos
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Yong Gu Lee
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
- College of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea
| | - Shan Liu
- Department of Microbiology, University of Pennsylvania, Philadelphia, PA, USA
| | - Jesse Rodriguez
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Michael Wang
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Hatcher J Ballard
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Aasha Gupta
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Ositadimma H Ugwuanyi
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Seok Jae Albert Hong
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Audrey C Bochi-Layec
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Christopher T Sauter
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Linhui Chen
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Luca Paruzzo
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Shane Kammerman
- Division of Infectious Diseases, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Olga Shestova
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Dongfang Liu
- Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Laura A Vella
- Division of Infectious Diseases, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Stephen J Schuster
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Jakub Svoboda
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Patrizia Porazzi
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Marco Ruella
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
- Center for Cellular Immunotherapies, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
- Department of Medicine, Division of Hematology and Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA.
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16
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Chen L, Patil S, Barbon J, Waire J, Laroux S, McCarthy D, Pratibha M, Zhong S, Dong F, Orsi K, Nguyen G, Yang Y, Crosbie N, Dominguez E, Deora A, Veldman G, Westmoreland S, Jin L, Radstake T, White K, Wei HJ. Agonistic anti-DCIR antibody inhibits ITAM-mediated inflammatory signaling and promotes immune resolution. JCI Insight 2024; 9:e176064. [PMID: 38781017 PMCID: PMC11383175 DOI: 10.1172/jci.insight.176064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 05/15/2024] [Indexed: 05/25/2024] Open
Abstract
DC inhibitory receptor (DCIR) is a C-type lectin receptor selectively expressed on myeloid cells, including monocytes, macrophages, DCs, and neutrophils. Its role in immune regulation has been implicated in murine models and human genome-wide association studies, suggesting defective DCIR function associates with increased susceptibility to autoimmune diseases such as rheumatoid arthritis, lupus, and Sjögren's syndrome. However, little is known about the mechanisms underlying DCIR activation to dampen inflammation. Here, we developed anti-DCIR agonistic antibodies that promote phosphorylation on DCIR's immunoreceptor tyrosine-based inhibitory motifs and recruitment of SH2 containing protein tyrosine phosphatase-2 for reducing inflammation. We also explored the inflammation resolution by depleting DCIR+ cells with antibodies. Utilizing a human DCIR-knock-in mouse model, we validated the antiinflammatory properties of the agonistic anti-DCIR antibody in experimental peritonitis and colitis. These findings provide critical evidence for targeting DCIR to develop transformative therapies for inflammatory diseases.
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Affiliation(s)
- Liang Chen
- AbbVie, Cambridge Research Center, Cambridge, Massachusetts, USA
| | - Suresh Patil
- AbbVie, Cambridge Research Center, Cambridge, Massachusetts, USA
| | - Jeffrey Barbon
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - James Waire
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - Stephen Laroux
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - Donna McCarthy
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - Mishra Pratibha
- AbbVie, Cambridge Research Center, Cambridge, Massachusetts, USA
| | - Suju Zhong
- AbbVie, Cambridge Research Center, Cambridge, Massachusetts, USA
| | - Feng Dong
- AbbVie, Cambridge Research Center, Cambridge, Massachusetts, USA
| | - Karin Orsi
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - Gunarso Nguyen
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - Yingli Yang
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - Nancy Crosbie
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - Eric Dominguez
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - Arun Deora
- AbbVie, Cambridge Research Center, Cambridge, Massachusetts, USA
| | | | | | - Liang Jin
- AbbVie Bioresearch Center, Worcester, Massachusetts, USA
| | - Timothy Radstake
- AbbVie, Cambridge Research Center, Cambridge, Massachusetts, USA
| | - Kevin White
- AbbVie, Cambridge Research Center, Cambridge, Massachusetts, USA
| | - Hsi-Ju Wei
- AbbVie Bay Area, South San Francisco, California, USA
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17
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Ho M, Bonavida B. Cross-Talks between Raf Kinase Inhibitor Protein and Programmed Cell Death Ligand 1 Expressions in Cancer: Role in Immune Evasion and Therapeutic Implications. Cells 2024; 13:864. [PMID: 38786085 PMCID: PMC11119125 DOI: 10.3390/cells13100864] [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: 03/10/2024] [Revised: 05/11/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024] Open
Abstract
Innovations in cancer immunotherapy have resulted in the development of several novel immunotherapeutic strategies that can disrupt immunosuppression. One key advancement lies in immune checkpoint inhibitors (ICIs), which have shown significant clinical efficacy and increased survival rates in patients with various therapy-resistant cancers. This immune intervention consists of monoclonal antibodies directed against inhibitory receptors (e.g., PD-1) on cytotoxic CD8 T cells or against corresponding ligands (e.g., PD-L1/PD-L2) overexpressed on cancer cells and other cells in the tumor microenvironment (TME). However, not all cancer cells respond-there are still poor clinical responses, immune-related adverse effects, adaptive resistance, and vulnerability to ICIs in a subset of patients with cancer. This challenge showcases the heterogeneity of cancer, emphasizing the existence of additional immunoregulatory mechanisms in many patients. Therefore, it is essential to investigate PD-L1's interaction with other oncogenic genes and pathways to further advance targeted therapies and address resistance mechanisms. Accordingly, our aim was to investigate the mechanisms governing PD-L1 expression in tumor cells, given its correlation with immune evasion, to uncover novel mechanisms for decreasing PD-L1 expression and restoring anti-tumor immune responses. Numerous studies have demonstrated that the upregulation of Raf Kinase Inhibitor Protein (RKIP) in many cancers contributes to the suppression of key hyperactive pathways observed in malignant cells, alongside its broadening involvement in immune responses and the modulation of the TME. We, therefore, hypothesized that the role of PD-L1 in cancer immune surveillance may be inversely correlated with the low expression level of the tumor suppressor Raf Kinase Inhibitor Protein (RKIP) expression in cancer cells. This hypothesis was investigated and we found several signaling cross-talk pathways between the regulations of both RKIP and PD-L1 expressions. These pathways and regulatory factors include the MAPK and JAK/STAT pathways, GSK3β, cytokines IFN-γ and IL-1β, Sox2, and transcription factors YY1 and NFκB. The pathways that upregulated PD-L1 were inhibitory for RKIP expression and vice versa. Bioinformatic analyses in various human cancers demonstrated the inverse relationship between PD-L1 and RKIP expressions and their prognostic roles. Therefore, we suspect that the direct upregulation of RKIP and/or the use of targeted RKIP inducers in combination with ICIs could result in a more targeted anti-tumor immune response-addressing the therapeutic challenges related to PD-1/PD-L1 monotherapy alone.
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Affiliation(s)
| | - Benjamin Bonavida
- Department of Microbiology, Immunology & Molecular Genetics, David Geffen School of Medicine, Jonsson Comprehensive Cancer, University of California, Los Angeles, CA 90095, USA;
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18
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Gao Y, Xing S, Hu L. Probing the Immunoreceptor Tyrosine-Based Inhibition Motif Interaction Protein Partners with Proteomics. Molecules 2024; 29:1977. [PMID: 38731468 PMCID: PMC11085718 DOI: 10.3390/molecules29091977] [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: 03/20/2024] [Revised: 04/18/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
Phosphorylation of tyrosine is the basic mode of protein function and signal transduction in organisms. This process is regulated by protein tyrosine kinases (PTKs) and protein tyrosinases (PTPs). Immunoreceptor tyrosine-based inhibition motif (ITIM) has been considered as regulating the PTP activity through the interaction with the partner proteins in the cell signal pathway. The ITIM sequences need to be phosphorylated first to active the downstream signaling proteins. To explore potential regulatory mechanisms, the ITIM sequences of two transmembrane immunoglobulin proteins, myelin P0 protein-related protein (PZR) and programmed death 1 (PD-1), were analyzed to investigate their interaction with proteins involved in regulatory pathways. We discovered that phosphorylated ITIM sequences can selectively interact with the tyrosine phosphatase SHP2. Specifically, PZR-N-ITIM (pY) may be critical in the interaction between the ITIM and SH2 domains of SHP2, while PD1-C-ITSM (pY) may play a key role in the interaction between the ITIM and SH2 domains of SHP2. Quite a few proteins were identified containing the SH2 domain, exhibiting phosphorylation-mediated interaction with PZR-ITIM. In this study, 14 proteins with SH2 structural domains were identified by GO analysis on 339 proteins associated to the affinity pull-down of PZR-N-ITIM (pY). Through the SH2 domains, these proteins may interact with PZR-ITIM in a phosphorylation-dependent manner.
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Affiliation(s)
| | - Shu Xing
- School of Life Sciences, Jilin University, Changchun 130012, China;
| | - Lianghai Hu
- School of Life Sciences, Jilin University, Changchun 130012, China;
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19
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Xi X, Zhao W. Anti-Tumor Potential of Post-Translational Modifications of PD-1. Curr Issues Mol Biol 2024; 46:2119-2132. [PMID: 38534752 DOI: 10.3390/cimb46030136] [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: 12/14/2023] [Revised: 01/29/2024] [Accepted: 02/04/2024] [Indexed: 03/28/2024] Open
Abstract
Programmed cell death protein-1 (PD-1) is a vital immune checkpoint molecule. The location, stability, and protein-protein interaction of PD-1 are significantly influenced by post-translational modification (PTM) of proteins. The biological information of PD-1, including its gene and protein structures and the PD-1/PD-L1 signaling pathway, was briefly reviewed in this review. Additionally, recent research on PD-1 post-translational modification, including the study of ubiquitination, glycosylation, phosphorylation, and palmitoylation, was summarized, and research strategies for PD-1 PTM drugs were concluded. At present, only a part of PD-1/PD-L1 treated patients (35-45%) are benefited from immunotherapies, and novel strategies targeting PTM of PD-1/PD-L1 may be important for anti-PD-1/PD-L1 non-responders (poor responders).
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Affiliation(s)
- Xiaoming Xi
- State Key Laboratory of Respiratory Health and Multimorbidity, Institute of Medical Biotechnology, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China
| | - Wuli Zhao
- State Key Laboratory of Respiratory Health and Multimorbidity, Institute of Medical Biotechnology, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China
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20
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Sharma S, Whitehead T, Kotowski M, Ng EZQ, Clarke J, Leitner J, Chen YL, Santos AM, Steinberger P, Davis SJ. A high-throughput two-cell assay for interrogating inhibitory signaling pathways in T cells. Life Sci Alliance 2024; 7:e202302359. [PMID: 38073578 PMCID: PMC10703992 DOI: 10.26508/lsa.202302359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/30/2023] [Accepted: 11/30/2023] [Indexed: 12/18/2023] Open
Abstract
The recent success of immunotherapies relying on manipulation of T-cell activation highlights the value of characterising the mediators of immune checkpoint signaling. CRISPR/Cas9 is a popular approach for interrogating signaling pathways; however, the lack of appropriate assays for studying inhibitory signaling in T cells is limiting the use of large-scale perturbation-based approaches. Here, we adapted an existing Jurkat cell-based transcriptional reporter assay to study both activatory and inhibitory (PD-1-mediated) T-cell signaling using CRISPR-based genome screening in arrayed and pooled formats. We targeted 64 SH2 domain-containing proteins expressed by Jurkat T cells in an arrayed screen, in which individual targets could be assessed independently, showing that arrays can be used to study mediators of both activatory and inhibitory signaling. Pooled screens succeeded in simultaneously identifying many of the known mediators of proximal activating and inhibitory T-cell signaling, including SHP2 and PD-1, confirming the utility of the method. Altogether, the data suggested that SHP2 is the major PD-1-specific, SH2 family mediator of inhibitory signaling. These approaches should allow the systematic analysis of signaling pathways in T cells.
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Affiliation(s)
- Sumana Sharma
- MRC Translational Immune Discovery Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Toby Whitehead
- MRC Translational Immune Discovery Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Mateusz Kotowski
- MRC Translational Immune Discovery Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Emily Zhi Qing Ng
- MRC Translational Immune Discovery Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Joseph Clarke
- MRC Translational Immune Discovery Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Judith Leitner
- Division of Immune Receptors and T Cell Activation, Institute of Immunology, Medical University of Vienna, Vienna, Austria
| | - Yi-Ling Chen
- MRC Translational Immune Discovery Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Ana Mafalda Santos
- MRC Translational Immune Discovery Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Peter Steinberger
- Division of Immune Receptors and T Cell Activation, Institute of Immunology, Medical University of Vienna, Vienna, Austria
| | - Simon J Davis
- MRC Translational Immune Discovery Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
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21
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Yu X, Yang F, Shen Z, Zhang Y, Sun J, Qiu C, Zheng Y, Zhao W, Yuan S, Zeng D, Zhang S, Long J, Zhu M, Zhang X, Wu J, Ma Z, Zhu H, Su M, Xu J, Li B, Mao R, Su Z, Zhang J. BTLA contributes to acute-on-chronic liver failure infection and mortality through CD4 + T-cell exhaustion. Nat Commun 2024; 15:1835. [PMID: 38418488 PMCID: PMC10901893 DOI: 10.1038/s41467-024-46047-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 02/08/2024] [Indexed: 03/01/2024] Open
Abstract
B- and T-lymphocyte attenuator (BTLA) levels are increased in patients with hepatitis B virus-related acute-on-chronic liver failure (HBV-ACLF). This condition is characterized by susceptibility to infection and T-cell immune exhaustion. However, whether BTLA can induce T-cell immune exhaustion and increase the risk of infection remains unclear. Here, we report that BTLA levels are significantly increased in the circulating and intrahepatic CD4+ T cells from patients with HBV-ACLF, and are positively correlated with disease severity, prognosis, and infection complications. BTLA levels were upregulated by the IL-6 and TNF signaling pathways. Antibody crosslinking of BTLA activated the PI3K-Akt pathway to inhibit the activation, proliferation, and cytokine production of CD4+ T cells while promoting their apoptosis. In contrast, BTLA knockdown promoted their activation and proliferation. BTLA-/- ACLF mice exhibited increased cytokine secretion, and reduced mortality and bacterial burden. The administration of a neutralizing anti-BTLA antibody reduced Klebsiella pneumoniae load and mortality in mice with ACLF. These data may help elucidate HBV-ACLF pathogenesis and aid in identifying novel drug targets.
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Affiliation(s)
- Xueping Yu
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China.
- Department of Infectious Diseases, First Hospital of Quanzhou Affiliated to Fujian Medical University, 362000, Quanzhou, China.
| | - Feifei Yang
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Zhongliang Shen
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Yao Zhang
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Jian Sun
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Chao Qiu
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Yijuan Zheng
- Department of Infectious Diseases, First Hospital of Quanzhou Affiliated to Fujian Medical University, 362000, Quanzhou, China
| | - Weidong Zhao
- Department of Laboratory Medicine, Clinical Medicine College, Dali University, 671000, Dali, China
| | - Songhua Yuan
- Shanghai Public Health Clinical Center and Institutes of Biomedical Science, Shanghai Medical College, Fudan University, 200040, Shanghai, China
| | - Dawu Zeng
- Department of Hepatology, the First Affiliated Hospital, Fujian Medical University, 350000, Fuzhou, China
| | - Shenyan Zhang
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Jianfei Long
- Department of Pharmacy, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Mengqi Zhu
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Xueyun Zhang
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Jingwen Wu
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Zhenxuan Ma
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Haoxiang Zhu
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Milong Su
- Department of Infectious Diseases, First Hospital of Quanzhou Affiliated to Fujian Medical University, 362000, Quanzhou, China
| | - Jianqing Xu
- Shanghai Public Health Clinical Center and Institutes of Biomedical Science, Shanghai Medical College, Fudan University, 200040, Shanghai, China
| | - Bin Li
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, 200040, Shanghai, China
| | - Richeng Mao
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China.
| | - Zhijun Su
- Department of Infectious Diseases, First Hospital of Quanzhou Affiliated to Fujian Medical University, 362000, Quanzhou, China.
| | - Jiming Zhang
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, Shanghai Institute of Infectious Diseases and Biosecurity, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, 200040, Shanghai, China.
- Key Laboratory of Medical Molecular Virology (MOE/MOH), Shanghai Medical College, Fudan University, 200040, Shanghai, China.
- Department of Infectious Diseases, Jing'An Branch of Huashan Hospital, Fudan University, 200040, Shanghai, China.
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22
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McCord K, Wang C, Anhalt M, Poon WW, Gavin AL, Wu P, Macauley MS. Dissecting the Ability of Siglecs To Antagonize Fcγ Receptors. ACS CENTRAL SCIENCE 2024; 10:315-330. [PMID: 38435516 PMCID: PMC10906256 DOI: 10.1021/acscentsci.3c00969] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 12/19/2023] [Accepted: 12/21/2023] [Indexed: 03/05/2024]
Abstract
Fcγ receptors (FcγRs) play key roles in the effector function of IgG, but their inappropriate activation plays a role in several disease etiologies. Therefore, it is critical to better understand how FcγRs are regulated. Numerous studies suggest that sialic acid-binding immunoglobulin-type lectins (Siglecs), a family of immunomodulatory receptors, modulate FcγR activity; however, it is unclear of the circumstances in which Siglecs can antagonize FcγRs and which Siglecs have this ability. Using liposomes displaying selective ligands to coengage FcγRs with a specific Siglec, we explore the ability of Siglec-3, Siglec-5, Siglec-7, and Siglec-9 to antagonize signaling downstream of FcγRs. We demonstrate that Siglec-3 and Siglec-9 can fully inhibit FcγR activation in U937 cells when coengaged with FcγRs. Cells expressing Siglec mutants reveal differential roles for the immunomodulatory tyrosine-based inhibitory motif (ITIM) and immunomodulatory tyrosine-based switch motif (ITSM) in this inhibition. Imaging flow cytometry enabled visualization of SHP-1 recruitment to Siglec-3 in an ITIM-dependent manner, while SHP-2 recruitment is more ITSM-dependent. Conversely, both cytosolic motifs of Siglec-9 contribute to SHP-1/2 recruitment. Siglec-7 poorly antagonizes FcγR activation for two reasons: masking by cis ligands and differences in its ITIM and ITSM. A chimera of the Siglec-3 extracellular domains and Siglec-5 cytosolic tail strongly inhibits FcγR when coengaged, providing evidence that Siglec-5 is more like Siglec-3 and Siglec-9 in its ability to antagonize FcγRs. Additionally, Siglec-3 and Siglec-9 inhibited FcγRs when coengaged by cells displaying ligands for both the Siglec and FcγRs. These results suggest a role for Siglecs in mediating FcγR inhibition in the context of an immunological synapse, which has important relevance to the effectiveness of immunotherapies.
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Affiliation(s)
- Kelli
A. McCord
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Chao Wang
- Department
of Molecular Medicine, Scripps Research
Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Mirjam Anhalt
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Wayne W. Poon
- Institute
for Memory Impairments and Neurological Disorders, University of California, Irvine, California 92617, United States
| | - Amanda L. Gavin
- Department
of Immunology and Microbiology, Scripps
Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Peng Wu
- Department
of Molecular Medicine, Scripps Research
Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Matthew S. Macauley
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
- Department
of Medical Microbiology and Immunology, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
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23
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Nishi W, Wakamatsu E, Machiyama H, Matsushima R, Yoshida Y, Nishikawa T, Toyota H, Furuhata M, Nishijima H, Takeuchi A, Suzuki M, Yokosuka T. Molecular Imaging of PD-1 Unveils Unknown Characteristics of PD-1 Itself by Visualizing "PD-1 Microclusters". ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1444:197-205. [PMID: 38467981 DOI: 10.1007/978-981-99-9781-7_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Programmed cell death-1 (PD-1) is one of the most famous coinhibitory receptors that are expressed on effector T cells to regulate their function. The PD-1 ligands, PD-L1 and PD-L2, are expressed by various cells throughout the body at steady state and their expression was further regulated within different pathological conditions such as tumor-bearing and chronic inflammatory diseases. In recent years, immune checkpoint inhibitor (ICI) therapies with anti-PD-1 or anti-PD-L1 has become a standard treatment for various malignancies and has shown remarkable antitumor effects. Since the discovery of PD-1 in 1992, a huge number of studies have been conducted to elucidate the function of PD-1. Herein, this paper provides an overview of PD-1 biological findings and sheds some light on the current technology for molecular imaging of PD-1.
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Affiliation(s)
- Wataru Nishi
- Department of Thoracic Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
- Department of Immunology, Tokyo Medical University, Tokyo, Japan
| | - Ei Wakamatsu
- Department of Immunology, Tokyo Medical University, Tokyo, Japan
| | | | - Ryohei Matsushima
- Department of Thoracic Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
- Department of Immunology, Tokyo Medical University, Tokyo, Japan
| | - Yosuke Yoshida
- Department of Immunology, Tokyo Medical University, Tokyo, Japan
- Department of Nephrology, Tokyo Medical University, Tokyo, Japan
| | - Tetsushi Nishikawa
- Department of Immunology, Tokyo Medical University, Tokyo, Japan
- Department of Dermatology, Tokyo Medical University, Tokyo, Japan
| | - Hiroko Toyota
- Department of Immunology, Tokyo Medical University, Tokyo, Japan
| | - Masae Furuhata
- Department of Immunology, Tokyo Medical University, Tokyo, Japan
| | | | - Arata Takeuchi
- Department of Immunology, Tokyo Medical University, Tokyo, Japan
| | - Makoto Suzuki
- Department of Thoracic Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Tadashi Yokosuka
- Department of Immunology, Tokyo Medical University, Tokyo, Japan.
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24
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Lim S, Lee KW, Kim JY, Kim KD. Consideration of SHP-1 as a Molecular Target for Tumor Therapy. Int J Mol Sci 2023; 25:331. [PMID: 38203502 PMCID: PMC10779157 DOI: 10.3390/ijms25010331] [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: 12/01/2023] [Revised: 12/23/2023] [Accepted: 12/23/2023] [Indexed: 01/12/2024] Open
Abstract
Abnormal activation of receptor tyrosine kinases (RTKs) contributes to tumorigenesis, while protein tyrosine phosphatases (PTPs) contribute to tumor control. One of the most representative PTPs is Src homology region 2 (SH2) domain-containing phosphatase 1 (SHP-1), which is associated with either an increased or decreased survival rate depending on the cancer type. Hypermethylation in the promoter region of PTPN6, the gene for the SHP-1 protein, is a representative epigenetic regulation mechanism that suppresses the expression of SHP-1 in tumor cells. SHP-1 comprises two SH2 domains (N-SH2 and C-SH2) and a catalytic PTP domain. Intramolecular interactions between the N-SH2 and PTP domains inhibit SHP-1 activity. Opening of the PTP domain by a conformational change in SHP-1 increases enzymatic activity and contributes to a tumor control phenotype by inhibiting the activation of the Janus kinase/signal transducer and activator of transcription (JAK/STAT3) pathway. Although various compounds that increase SHP-1 activation or expression have been proposed as tumor therapeutics, except sorafenib and its derivatives, few candidates have demonstrated clinical significance. In some cancers, SHP-1 expression and activation contribute to a tumorigenic phenotype by inducing a tumor-friendly microenvironment. Therefore, developing anticancer drugs targeting SHP-1 must consider the effect of SHP-1 on both cell biological mechanisms of SHP-1 in tumor cells and the tumor microenvironment according to the target cancer type. Furthermore, the use of combination therapies should be considered.
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Affiliation(s)
- Seyeon Lim
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Republic of Korea;
| | - Ki Won Lee
- Anti-Aging Bio Cell Factory—Regional Leading Research Center, Gyeongsang National University, Jinju 52828, Republic of Korea;
| | - Jeong Yoon Kim
- Department of Pharmaceutical Engineering, Institute of Agricultural and Life Science (IALS), Gyeongsang National University, Jinju 52725, Republic of Korea;
| | - Kwang Dong Kim
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Republic of Korea;
- Anti-Aging Bio Cell Factory—Regional Leading Research Center, Gyeongsang National University, Jinju 52828, Republic of Korea;
- Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 52828, Republic of Korea
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25
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Qu Z, Dong J, Zhang ZY. Protein tyrosine phosphatases as emerging targets for cancer immunotherapy. Br J Pharmacol 2023:10.1111/bph.16304. [PMID: 38116815 PMCID: PMC11186978 DOI: 10.1111/bph.16304] [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: 08/30/2023] [Revised: 11/03/2023] [Accepted: 12/06/2023] [Indexed: 12/21/2023] Open
Abstract
Contemporary strategies in cancer immunotherapy, despite remarkable success, remain constrained by inherent limitations such as suboptimal patient responses, the emergence of drug resistance, and the manifestation of pronounced adverse effects. Consequently, the need for alternative strategies for immunotherapy becomes clear. Protein tyrosine phosphatases (PTPs) wield a pivotal regulatory influence over an array of essential cellular processes. Substantial research has underscored the potential in targeting PTPs to modulate the immune responses and/or regulate antigen presentation, thereby presenting a novel paradigm for cancer immunotherapy. In this review, we focus on recent advances in genetic and biological validation of several PTPs as emerging targets for immunotherapy. We also highlight recent development of small molecule inhibitors and degraders targeting these PTPs as novel cancer immunotherapeutic agents.
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Affiliation(s)
- Zihan Qu
- Department of Chemistry, Purdue University, 720 Clinic Drive, West Lafayette, IN 47907, USA
| | - Jiajun Dong
- Borch Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, 720 Clinic Drive, West Lafayette, IN 47907, USA
| | - Zhong-Yin Zhang
- Department of Chemistry, Purdue University, 720 Clinic Drive, West Lafayette, IN 47907, USA
- Borch Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, 720 Clinic Drive, West Lafayette, IN 47907, USA
- Institute for Cancer Research, Purdue University, 720 Clinic Drive, West Lafayette, IN 47907, USA
- Institute for Drug Discovery, Purdue University, 720 Clinic Drive, West Lafayette, IN 47907, USA
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26
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Parvez A, Choudhary F, Mudgal P, Khan R, Qureshi KA, Farooqi H, Aspatwar A. PD-1 and PD-L1: architects of immune symphony and immunotherapy breakthroughs in cancer treatment. Front Immunol 2023; 14:1296341. [PMID: 38106415 PMCID: PMC10722272 DOI: 10.3389/fimmu.2023.1296341] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 11/08/2023] [Indexed: 12/19/2023] Open
Abstract
PD-1 (Programmed Cell Death Protein-1) and PD-L1 (Programmed Cell Death Ligand-1) play a crucial role in regulating the immune system and preventing autoimmunity. Cancer cells can manipulate this system, allowing them to escape immune detection and promote tumor growth. Therapies targeting the PD-1/PD-L1 pathway have transformed cancer treatment and have demonstrated significant effectiveness against various cancer types. This study delves into the structure and signaling dynamics of PD-1 and its ligands PD-L1/PD-L2, the diverse PD-1/PD-L1 inhibitors and their efficacy, and the resistance observed in some patients. Furthermore, this study explored the challenges associated with the PD-1/PD-L1 inhibitor treatment approach. Recent advancements in the combination of immunotherapy with chemotherapy, radiation, and surgical procedures to enhance patient outcomes have also been highlighted. Overall, this study offers an in-depth overview of the significance of PD-1/PD-L1 in cancer immunotherapy and its future implications in oncology.
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Affiliation(s)
- Adil Parvez
- Department of Biotechnology, School of Chemical and Life Sciences, Jamia, Hamdard, New Delhi, India
| | - Furqan Choudhary
- Department of Biotechnology, School of Chemical and Life Sciences, Jamia, Hamdard, New Delhi, India
| | - Priyal Mudgal
- Department of Biotechnology, School of Chemical and Life Sciences, Jamia, Hamdard, New Delhi, India
| | - Rahila Khan
- Department of Biotechnology, School of Chemical and Life Sciences, Jamia, Hamdard, New Delhi, India
| | - Kamal A. Qureshi
- Department of Pharmaceutics, Unaizah College of Pharmacy, Qassim University, Unaizah, Qassim, Saudi Arabia
| | - Humaira Farooqi
- Department of Biotechnology, School of Chemical and Life Sciences, Jamia, Hamdard, New Delhi, India
| | - Ashok Aspatwar
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
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27
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Liu L, Lei Y, Zheng Z, Zhou X, Chen S, Zeng G, Yu L, Wang P, Chen L. 6-Mercaptopurine potently inhibits recruitment of SHP2 by phosphorylated PD-1 to inhibit PD-1 signalling and enhance T cell function. Immunology 2023; 170:230-242. [PMID: 37259771 DOI: 10.1111/imm.13671] [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: 03/12/2023] [Accepted: 05/10/2023] [Indexed: 06/02/2023] Open
Abstract
Antibody inhibitors that block PD-1/PD-L1 interaction have been approved for oncological clinics, yielding impressive treatment effects. Small molecules inhibiting PD-1 signalling are at various stages of development, given that small molecular drugs are expected to outperform protein drugs in several ways. Currently, a significant portion of these small molecular inhibitors achieve this purpose by binding to a limited region of the PD-L1 protein, thereby limiting the choice of chemical structures. Alternative strategies for developing small-molecular PD-1 inhibitors are urgently needed to broaden the choice of chemical structures. Here, we report that 6-mercaptopurine (6-MP) inhibits PD-1 signalling, activates T cell function in vitro and in vivo and shrinks tumours by activating cytotoxic T cells. Mechanistically, 6-MP potently inhibited PD-1 signalling by blocking the recruitment of SHP2 by PD-1. Considering that 6-MP is a chemotherapeutic agent already approved by the FDA for childhood leukaemia, our work revealed a novel anti-tumour mechanism for this drug and suggests that 6-MP warrants further clinical evaluation for other tumour types.
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Affiliation(s)
- Lu Liu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Yuxi Lei
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Zongyao Zheng
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Xingang Zhou
- Department of Pathlogy & Laboratory Medicine, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Shuzhen Chen
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Guandi Zeng
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Lei Yu
- Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Peng Wang
- Department of Pathlogy & Laboratory Medicine, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Liang Chen
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
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28
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Xu X, Dennett P, Zhang J, Sherrard A, Zhao Y, Masubuchi T, Bui JD, Chen X, Hui E. CTLA4 depletes T cell endogenous and trogocytosed B7 ligands via cis-endocytosis. J Exp Med 2023; 220:e20221391. [PMID: 37042938 PMCID: PMC10103642 DOI: 10.1084/jem.20221391] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 02/16/2023] [Accepted: 03/16/2023] [Indexed: 04/13/2023] Open
Abstract
CD28 and CTLA4 are T cell coreceptors that competitively engage B7 ligands CD80 and CD86 to control adaptive immune responses. While the role of CTLA4 in restraining CD28 costimulatory signaling is well-established, the mechanism has remained unclear. Here, we report that human T cells acquire antigen-presenting-cell (APC)-derived B7 ligands and major histocompatibility complex (MHC) via trogocytosis through CD28:B7 binding. Acquired MHC and B7 enabled T cells to autostimulate, and this process was limited cell-intrinsically by CTLA4, which depletes B7 ligands trogocytosed or endogenously expressed by T cells through cis-endocytosis. Extending this model to the previously proposed extrinsic function of CTLA4 in human regulatory T cells (Treg), we show that blockade of either CD28 or CTLA4 attenuates Treg-mediated depletion of APC B7, indicating that trogocytosis and CTLA4-mediated cis-endocytosis work together to deplete B7 from APCs. Our study establishes CTLA4 as a cell-intrinsic molecular sink that limits B7 availability on the surface of T cells, with implications for CTLA4-targeted therapy.
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Affiliation(s)
- Xiaozheng Xu
- Department of Cell & Developmental Biology, University of California, San Diego, La Jolla, CA, USA
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA
| | - Preston Dennett
- Department of Cell & Developmental Biology, University of California, San Diego, La Jolla, CA, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA
| | - Jibin Zhang
- Department of Cell & Developmental Biology, University of California, San Diego, La Jolla, CA, USA
| | - Alice Sherrard
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA
| | - Yunlong Zhao
- Department of Cell & Developmental Biology, University of California, San Diego, La Jolla, CA, USA
| | - Takeya Masubuchi
- Department of Cell & Developmental Biology, University of California, San Diego, La Jolla, CA, USA
| | - Jack D. Bui
- Department of Pathology, University of California, San Diego, La Jolla, CA, USA
| | - Xu Chen
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA
| | - Enfu Hui
- Department of Cell & Developmental Biology, University of California, San Diego, La Jolla, CA, USA
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29
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Zhao Y, Caron C, Chan YY, Lee CK, Xu X, Zhang J, Masubuchi T, Wu C, Bui JD, Hui E. cis-B7:CD28 interactions at invaginated synaptic membranes provide CD28 co-stimulation and promote CD8 + T cell function and anti-tumor immunity. Immunity 2023; 56:1187-1203.e12. [PMID: 37160118 PMCID: PMC10330546 DOI: 10.1016/j.immuni.2023.04.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 01/30/2023] [Accepted: 04/07/2023] [Indexed: 05/11/2023]
Abstract
B7 ligands (CD80 and CD86), expressed by professional antigen-presenting cells (APCs), activate the main co-stimulatory receptor CD28 on T cells in trans. However, in peripheral tissues, APCs expressing B7 ligands are relatively scarce. This raises the questions of whether and how CD28 co-stimulation occurs in peripheral tissues. Here, we report that CD8+ T cells displayed B7 ligands that interacted with CD28 in cis at membrane invaginations of the immunological synapse as a result of membrane remodeling driven by phosphoinositide-3-kinase (PI3K) and sorting-nexin-9 (SNX9). cis-B7:CD28 interactions triggered CD28 signaling through protein kinase C theta (PKCθ) and promoted CD8+ T cell survival, migration, and cytokine production. In mouse tumor models, loss of T cell-intrinsic cis-B7:CD28 interactions decreased intratumoral T cells and accelerated tumor growth. Thus, B7 ligands on CD8+ T cells can evoke cell-autonomous CD28 co-stimulation in cis in peripheral tissues, suggesting cis-signaling as a general mechanism for boosting T cell functionality.
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Affiliation(s)
- Yunlong Zhao
- Department of Cell and Developmental Biology, School of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA.
| | - Christine Caron
- Department of Pathology, University of California San Diego, La Jolla, CA 92093, USA
| | - Ya-Yuan Chan
- Department of Cell and Developmental Biology, School of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Calvin K Lee
- Department of Pathology, University of California San Diego, La Jolla, CA 92093, USA
| | - Xiaozheng Xu
- Department of Cell and Developmental Biology, School of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Jibin Zhang
- Department of Cell and Developmental Biology, School of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Takeya Masubuchi
- Department of Cell and Developmental Biology, School of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Chuan Wu
- Experimental Immunology Branch, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Jack D Bui
- Department of Pathology, University of California San Diego, La Jolla, CA 92093, USA.
| | - Enfu Hui
- Department of Cell and Developmental Biology, School of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA.
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30
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Nishi W, Wakamatsu E, Machiyama H, Matsushima R, Saito K, Yoshida Y, Nishikawa T, Takehara T, Toyota H, Furuhata M, Nishijima H, Takeuchi A, Azuma M, Suzuki M, Yokosuka T. Evaluation of therapeutic PD-1 antibodies by an advanced single-molecule imaging system detecting human PD-1 microclusters. Nat Commun 2023; 14:3157. [PMID: 37280233 PMCID: PMC10244369 DOI: 10.1038/s41467-023-38512-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 05/04/2023] [Indexed: 06/08/2023] Open
Abstract
With recent advances in immune checkpoint inhibitors (ICIs), immunotherapy has become the standard treatment for various malignant tumors. Their indications and dosages have been determined empirically, taking individually conducted clinical trials into consideration, but without a standard method to evaluate them. Here we establish an advanced imaging system to visualize human PD-1 microclusters, in which a minimal T cell receptor (TCR) signaling unit co-localizes with the inhibitory co-receptor PD-1 in vitro. In these microclusters PD-1 dephosphorylates both the TCR/CD3 complex and its downstream signaling molecules via the recruitment of a phosphatase, SHP2, upon stimulation with the ligand hPD-L1. In this system, blocking antibodies for hPD-1-hPD-L1 binding inhibits hPD-1 microcluster formation, and each therapeutic antibody (pembrolizumab, nivolumab, durvalumab and atezolizumab) is characterized by a proprietary optimal concentration and combinatorial efficiency enhancement. We propose that our imaging system could digitally evaluate PD-1-mediated T cell suppression to evaluate their clinical usefulness and to develop the most suitable combinations among ICIs or between ICIs and conventional cancer treatments.
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Affiliation(s)
- Wataru Nishi
- Department of Thoracic Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
| | - Ei Wakamatsu
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
| | - Hiroaki Machiyama
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
| | - Ryohei Matsushima
- Department of Thoracic Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
| | - Kensho Saito
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, 192-0392, Japan
| | - Yosuke Yoshida
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
- Department of Nephrology, Tokyo Medical University, Tokyo, 160-8402, Japan
| | - Tetsushi Nishikawa
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
- Department of Dermatology, Tokyo Medical University, Tokyo, 160-0023, Japan
| | - Tomohiro Takehara
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, 160-8582, Japan
| | - Hiroko Toyota
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
| | - Masae Furuhata
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
| | - Hitoshi Nishijima
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
| | - Arata Takeuchi
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan
| | - Miyuki Azuma
- Department of Molecular Immunology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, 113-8549, Japan
| | - Makoto Suzuki
- Department of Thoracic Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Tadashi Yokosuka
- Department of Immunology, Tokyo Medical University, Tokyo, 160-8402, Japan.
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31
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Taylor J, Bulek A, Gannon I, Robson M, Kokalaki E, Grothier T, McKenzie C, El-Kholy M, Stavrou M, Traynor-White C, Lim WC, Panagiotou P, Srivastava S, Baldan V, Sillibourne J, Ferrari M, Pule M, Thomas S. Exploration of T cell immune responses by expression of a dominant-negative SHP1 and SHP2. Front Immunol 2023; 14:1119350. [PMID: 37334382 PMCID: PMC10272835 DOI: 10.3389/fimmu.2023.1119350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 05/15/2023] [Indexed: 06/20/2023] Open
Abstract
SHP1 and SHP2 are SH2 domain-containing proteins which have inhibitory phosphatase activity when recruited to phosphorylated ITIMs and ITSMs on inhibitory immune receptors. Consequently, SHP1 and SHP2 are key proteins in the transmission of inhibitory signals within T cells, constituting an important point of convergence for diverse inhibitory receptors. Therefore, SHP1 and SHP2 inhibition may represent a strategy for preventing immunosuppression of T cells mediated by cancers hence improving immunotherapies directed against these malignancies. Both SHP1 and SHP2 contain dual SH2 domains responsible for localization to the endodomain of inhibitory receptors and a protein tyrosine phosphatase domain which dephosphorylates and thus inhibits key mediators of T cell activation. We explored the interaction of the isolated SH2 domains of SHP1 and SHP2 to inhibitory motifs from PD1 and identified strong binding of both SH2 domains from SHP2 and more moderate binding in the case of SHP1. We next explored whether a truncated form of SHP1/2 comprising only of SH2 domains (dSHP1/2) could act in a dominant negative fashion by preventing docking of the wild type proteins. When co-expressed with CARs we found that dSHP2 but not dSHP1 could alleviate immunosuppression mediated by PD1. We next explored the capacity of dSHP2 to bind with other inhibitory receptors and observed several potential interactions. In vivo we observed that the expression of PDL1 on tumor cells impaired the ability of CAR T cells to mediate tumor rejection and this effect was partially reversed by the co-expression of dSHP2 albeit at the cost of reduced CAR T cell proliferation. Modulation of SHP1 and SHP2 activity in engineered T cells through the expression of these truncated variants may enhance T cell activity and hence efficacy in the context of cancer immunotherapy.
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Affiliation(s)
- Julia Taylor
- Research and Development, Autolus Ltd, London, United Kingdom
| | - Anna Bulek
- Research and Development, Autolus Ltd, London, United Kingdom
| | - Isaac Gannon
- Research and Development, Autolus Ltd, London, United Kingdom
| | - Mathew Robson
- Research and Development, Autolus Ltd, London, United Kingdom
| | | | - Thomas Grothier
- Research and Development, Autolus Ltd, London, United Kingdom
| | - Callum McKenzie
- Research and Development, Autolus Ltd, London, United Kingdom
| | | | - Maria Stavrou
- Research and Development, Autolus Ltd, London, United Kingdom
| | | | - Wen Chean Lim
- Research and Development, Autolus Ltd, London, United Kingdom
| | | | | | - Vania Baldan
- Research and Development, Autolus Ltd, London, United Kingdom
| | | | - Mathieu Ferrari
- Research and Development, Autolus Ltd, London, United Kingdom
| | - Martin Pule
- Research and Development, Autolus Ltd, London, United Kingdom
- Department of Haematology, University College London, London, United Kingdom
| | - Simon Thomas
- Research and Development, Autolus Ltd, London, United Kingdom
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32
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Hanson EK, Whelan RJ. Application of the Nicoya OpenSPR to Studies of Biomolecular Binding: A Review of the Literature from 2016 to 2022. SENSORS (BASEL, SWITZERLAND) 2023; 23:4831. [PMID: 37430747 DOI: 10.3390/s23104831] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/13/2023] [Accepted: 05/16/2023] [Indexed: 07/12/2023]
Abstract
The Nicoya OpenSPR is a benchtop surface plasmon resonance (SPR) instrument. As with other optical biosensor instruments, it is suitable for the label-free interaction analysis of a diverse set of biomolecules, including proteins, peptides, antibodies, nucleic acids, lipids, viruses, and hormones/cytokines. Supported assays include affinity/kinetics characterization, concentration analysis, yes/no assessment of binding, competition studies, and epitope mapping. OpenSPR exploits localized SPR detection in a benchtop platform and can be connected with an autosampler (XT) to perform automated analysis over an extended time period. In this review article, we provide a comprehensive survey of the 200 peer-reviewed papers published between 2016 and 2022 that use the OpenSPR platform. We highlight the range of biomolecular analytes and interactions that have been investigated using the platform, provide an overview on the most common applications for the instrument, and point out some representative research that highlights the flexibility and utility of the instrument.
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Affiliation(s)
- Eliza K Hanson
- Department of Chemistry, University of Kansas, Lawrence, KS 66045, USA
| | - Rebecca J Whelan
- Department of Chemistry, University of Kansas, Lawrence, KS 66045, USA
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33
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New Targets for Antiviral Therapy: Inhibitory Receptors and Immune Checkpoints on Myeloid Cells. Viruses 2022; 14:v14061144. [PMID: 35746616 PMCID: PMC9230063 DOI: 10.3390/v14061144] [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: 05/12/2022] [Accepted: 05/23/2022] [Indexed: 11/26/2022] Open
Abstract
Immune homeostasis is achieved by balancing the activating and inhibitory signal transduction pathways mediated via cell surface receptors. Activation allows the host to mount an immune response to endogenous and exogenous antigens; suppressive modulation via inhibitory signaling protects the host from excessive inflammatory damage. The checkpoint regulation of myeloid cells during immune homeostasis raised their profile as important cellular targets for treating allergy, cancer and infectious disease. This review focuses on the structure and signaling of inhibitory receptors on myeloid cells, with particular attention placed on how the interplay between viruses and these receptors regulates antiviral immunity. The status of targeting inhibitory receptors on myeloid cells as a new therapeutic approach for antiviral treatment will be analyzed.
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34
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Chiang EY, Mellman I. TIGIT-CD226-PVR axis: advancing immune checkpoint blockade for cancer immunotherapy. J Immunother Cancer 2022; 10:jitc-2022-004711. [PMID: 35379739 PMCID: PMC8981293 DOI: 10.1136/jitc-2022-004711] [Citation(s) in RCA: 105] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/08/2022] [Indexed: 12/22/2022] Open
Abstract
Recent advances in understanding the roles of immune checkpoints in allowing tumors to circumvent the immune system have led to successful therapeutic strategies that have fundamentally changed oncology practice. Thus far, immunotherapies against only two checkpoint targets have been approved, CTLA-4 and PD-L1/PD-1. Antibody blockade of these targets enhances the function of antitumor T cells at least in part by relieving inhibition of the T cell costimulatory receptor CD28. These successes have stimulated considerable interest in identifying other pathways that may bte targeted alone or together with existing immunotherapies. One such immune checkpoint axis is comprised of members of the PVR/nectin family that includes the inhibitory receptor T cell immunoreceptor with Ig and immunoreceptor tyrosine-based inhibitory domains (TIGIT). Interestingly, TIGIT acts to regulate the activity of a second costimulatory receptor CD226 that works in parallel to CD28. There are currently over two dozen TIGIT-directed blocking antibodies in various phases of clinical development, testament to the promise of modulating this pathway to enhance antitumor immune responses. In this review, we discuss the role of TIGIT as a checkpoint inhibitor, its interplay with the activating counter-receptor CD226, and its status as the next advance in cancer immunotherapy.
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Affiliation(s)
- Eugene Y Chiang
- Cancer Immunology, Genentech Inc, South San Francisco, California, USA
| | - Ira Mellman
- Cancer Immunology, Genentech Inc, South San Francisco, California, USA
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Immune Checkpoint Receptors Signaling in T Cells. Int J Mol Sci 2022; 23:ijms23073529. [PMID: 35408889 PMCID: PMC8999077 DOI: 10.3390/ijms23073529] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/16/2022] [Accepted: 03/21/2022] [Indexed: 12/15/2022] Open
Abstract
The characterization of the receptors negatively modulating lymphocyte function is rapidly advancing, driven by success in tumor immunotherapy. As a result, the number of immune checkpoint receptors characterized from a functional perspective and targeted by innovative drugs continues to expand. This review focuses on the less explored area of the signaling mechanisms of these receptors, of those expressed in T cells. Studies conducted mainly on PD-1, CTLA-4, and BTLA have evidenced that the extracellular parts of some of the receptors act as decoy receptors for activating ligands, but in all instances, the tyrosine phosphorylation of their cytoplasmatic tail drives a crucial inhibitory signal. This negative signal is mediated by a few key signal transducers, such as tyrosine phosphatase, inositol phosphatase, and diacylglycerol kinase, which allows them to counteract TCR-mediated activation. The characterization of these signaling pathways is of great interest in the development of therapies for counteracting tumor-infiltrating lymphocyte exhaustion/anergy independently from the receptors involved.
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