1
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Jiang L, Zhou Y, Tang S, Yang D, Zhang Y, Zhang J, Yang F, Zhou T, Xia X, Chen Q, Jiang L, Jiang Y, Feng X. Nociceptive adenosine A 2A receptor on trigeminal nerves orchestrates CGRP release to regulate the progression of oral squamous cell carcinoma. Int J Oral Sci 2024; 16:46. [PMID: 38886342 PMCID: PMC11183250 DOI: 10.1038/s41368-024-00308-w] [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: 12/04/2023] [Revised: 04/16/2024] [Accepted: 04/21/2024] [Indexed: 06/20/2024] Open
Abstract
Oral squamous cell carcinoma (OSCC) associated pain commonly predicts adverse events among patients. This clinical feature indicates the engagement of nociceptors on sensory neurons during the development of malignancy. However, it is yet to be determined if targeting oncometabolite-associated nociception processes can hinder OSCC progression. In this study, we reported that nociceptive endings infiltrating both clinical samples and mouse tumor xenografts were associated with poorer clinical outcomes and drove tumor progression in vivo, as evidenced by clinical tissue microarray analysis and murine lingual denervation. We observed that the OSCC microenvironment was characteristic of excessive adenosine due to CD73 upregulation which negatively predicted clinical outcomes in the TCGA-HNSC patient cohort. Notably, such adenosine concentrative OSCC niche was associated with the stimulation of adenosine A2A receptor (A2AR) on trigeminal ganglia. Antagonism of trigeminal A2AR with a selective A2AR inhibitor SCH58261 resulted in impeded OSCC growth in vivo. We showed that trigeminal A2AR overstimulation in OSCC xenograft did not entail any changes in the transcription level of CGRP in trigeminal ganglia but significantly triggered the release of CGRP, an effect counteracted by SCH58261. We further demonstrated the pro-tumor effect of CGRP by feeding mice with the clinically approved CGRP receptor antagonist rimegepant which inhibited the activation of ERK and YAP. Finally, we diminished the impact of CGRP on OSCC with istradefylline, a clinically available drug that targets neuronal A2AR. Therefore, we established trigeminal A2AR-mediated CGRP release as a promising druggable circuit in OSCC treatment.
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Grants
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- Fundamental Research Funds for the Central Universities (YJ201987); Sichuan Science and Technology Program (2021ZYD0090 and 2022YFS0207); Scientific Research Foundation, West China Hospital of Stomatology Sichuan University (QDJF2019-3 and RD-03-202110); CAMS Innovation Fund for Medical Sciences (CIFMS, 2019-I2M-5-004)
- Fundamental Research Funds for the Central Universities (YJ201987), Sichuan Science and Technology Program (2021ZYD0090 and 2022YFS0207), Scientific Research Foundation, West China Hospital of Stomatology Sichuan University (QDJF2019-3 and RD-03-202110), and CAMS Innovation Fund for Medical Sciences (CIFMS, 2019-I2M-5-004)
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Affiliation(s)
- Lanxin Jiang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ying Zhou
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Shijie Tang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Dan Yang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yixin Zhang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiuge Zhang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Fan Yang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Tong Zhou
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaoqiang Xia
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qianming Chen
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Affiliated Stomatology Hospital, Zhejiang University School of Stomatology, Hangzhou, China
| | - Lu Jiang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yuchen Jiang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| | - Xiaodong Feng
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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2
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Li R, Lei Y, Rezk A, Diego A Espinoza, Wang J, Feng H, Zhang B, Barcelos IP, Zhang H, Yu J, Huo X, Zhu F, Yang C, Tang H, Goldstein AC, Banwell BL, Hakonarson H, Xu H, Mingueneau M, Sun B, Li H, Bar-Or A. Oxidative phosphorylation regulates B cell effector cytokines and promotes inflammation in multiple sclerosis. Sci Immunol 2024; 9:eadk0865. [PMID: 38701189 DOI: 10.1126/sciimmunol.adk0865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 04/10/2024] [Indexed: 05/05/2024]
Abstract
Dysregulated B cell cytokine production contributes to pathogenesis of immune-mediated diseases including multiple sclerosis (MS); however, the underlying mechanisms are poorly understood. In this study we investigated how cytokine secretion by pro-inflammatory (GM-CSF-expressing) and anti-inflammatory (IL-10-expressing) B cells is regulated. Pro-inflammatory human B cells required increased oxidative phosphorylation (OXPHOS) compared with anti-inflammatory B cells. OXPHOS reciprocally modulated pro- and anti-inflammatory B cell cytokines through regulation of adenosine triphosphate (ATP) signaling. Partial inhibition of OXPHOS or ATP-signaling including with BTK inhibition resulted in an anti-inflammatory B cell cytokine shift, reversed the B cell cytokine imbalance in patients with MS, and ameliorated neuroinflammation in a myelin oligodendrocyte glycoprotein (MOG)-induced experimental autoimmune encephalitis mouse model. Our study identifies how pro- and anti-inflammatory cytokines are metabolically regulated in B cells and identifies ATP and its metabolites as a "fourth signal" that shapes B cell responses and is a potential target for restoring the B cell cytokine balance in autoimmune diseases.
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Affiliation(s)
- Rui Li
- Center for Neuroinflammation and Experimental Therapeutics and the Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Institute of Immunotherapy and Department of Neurology of First Affiliated Hospital, Fujian Medical University, Fuzhou, Fujian 350005, China
| | - Yanting Lei
- Department of Neurobiology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Ayman Rezk
- Center for Neuroinflammation and Experimental Therapeutics and the Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Diego A Espinoza
- Center for Neuroinflammation and Experimental Therapeutics and the Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jing Wang
- Department of Neurobiology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Huiru Feng
- Institute of Immunotherapy and Department of Neurology of First Affiliated Hospital, Fujian Medical University, Fuzhou, Fujian 350005, China
| | - Bo Zhang
- Institute of Immunotherapy and Department of Neurology of First Affiliated Hospital, Fujian Medical University, Fuzhou, Fujian 350005, China
| | - Isabella P Barcelos
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Hang Zhang
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Jing Yu
- Department of Neurobiology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Xinrui Huo
- Department of Neurobiology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Fangyi Zhu
- Department of Neurobiology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Changxin Yang
- Department of Neurobiology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Hao Tang
- MS Research Unit, Biogen, Cambridge, MA 02142, USA
| | - Amy C Goldstein
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Brenda L Banwell
- Division of Neurology, Children's Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Hakon Hakonarson
- Center for Applied Genomics, Division of Human Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Hongwei Xu
- Department of Immunology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | | | - Bo Sun
- Department of Neurobiology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Hulun Li
- Department of Neurobiology, Harbin Medical University, Harbin, Heilongjiang 150086, China
| | - Amit Bar-Or
- Center for Neuroinflammation and Experimental Therapeutics and the Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- MS Research Unit, Biogen, Cambridge, MA 02142, USA
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3
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Guo X, Xu L, Nie L, Zhang C, Liu Y, Zhao R, Cao J, Tian L, Liu M. B cells in head and neck squamous cell carcinoma: current opinion and novel therapy. Cancer Cell Int 2024; 24:41. [PMID: 38245714 PMCID: PMC10799521 DOI: 10.1186/s12935-024-03218-3] [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: 11/04/2023] [Accepted: 01/06/2024] [Indexed: 01/22/2024] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is a common malignant tumour. Despite advancements in surgery, radiotherapy and chemotherapy, which have improved the prognosis of most patients, a subset of patients with poor prognoses still exist due to loss of surgical opportunities, postoperative recurrence, and metastasis, among other reasons. The tumour microenvironment (TME) is a complex organization composed of tumour, stromal, and endothelial cells. Communication and interaction between tumours and immune cells within the TME are increasingly being recognized as pivotal in inhibiting or promoting tumour development. Previous studies on T cells in the TME of HNSCC have yielded novel therapeutic possibilities. However, the function of B cells, another adaptive immune cell type, in the TME of HNSCC patients has yet to be determined. Recent studies have revealed various distinct subtypes of B cells and tertiary lymphoid structures (TLSs) in the TME of HNSCC patients, which are believed to impact the efficacy of immune checkpoint inhibitors (ICIs). Therefore, this paper focuses on B cells in the TME to explore potential directions for future immunotherapy for HNSCC.
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Affiliation(s)
- Xinyue Guo
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Licheng Xu
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Luan Nie
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Chenyu Zhang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yaohui Liu
- Department of Otorhinolaryngology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Rui Zhao
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
| | - Jing Cao
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Linli Tian
- Department of Otorhinolaryngology, The First Affiliated Hospital of Harbin Medical University, Harbin, China.
| | - Ming Liu
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
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4
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Dang M, Yu J, Galant-Swafford J, Karam SD. The dichotomy of regulatory B cells in cancer versus allergic disease. Mol Carcinog 2024; 63:11-21. [PMID: 37712547 PMCID: PMC10994235 DOI: 10.1002/mc.23633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/02/2023] [Accepted: 09/05/2023] [Indexed: 09/16/2023]
Abstract
Regulatory B cells (Bregs) are an immunosuppressive cell phenotype that affects the immune system by limiting the inflammatory cascade. Dysregulation of Bregs can interestingly play a dichotomous role in the pathophysiology of many diseases and is especially highlighted when examining cancer pathology compared to allergic disease. This study reviews the existing literature on Bregs and compares their role in allergic disease in contrast to cancer development. Upregulation of Bregs in cancer states has been associated with poor prognostic outcomes across various cancer types, and Breg proliferation was associated with chronic interferon signaling, activation of the BCR-BTK (B cell receptor-Bruton's tyrosine kinase) pathway, and release of C-X-C motif ligand 13. In contrast, Breg dysfunction has been identified as a key mechanism in many allergic diseases, such as allergic asthma, allergic rhinitis, atopic dermatitis, and contact dermatitis. Development of Breg-targeted immunotherapies is currently at the preclinical level, but strategies differentially focus on Breg depletion in cancer versus Breg stimulation in allergy. Our review highlights the divergent functions that Bregs play in cancer compared to allergy. We conclude that natural homeostasis hinges on a fine balance between the dichotomous role of Bregs-over or underactivation can result in a pathological state.
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Affiliation(s)
- Melissa Dang
- Department of Internal Medicine, Sky Ridge Medical Center, Lone Tree, Colorado, USA
| | - Justin Yu
- Department of Otolaryngology—Head and Neck Surgery, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | | | - Sana D. Karam
- Department of Radiation Oncology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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5
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Bao J, Betzler AC, Hess J, Brunner C. Exploring the dual role of B cells in solid tumors: implications for head and neck squamous cell carcinoma. Front Immunol 2023; 14:1233085. [PMID: 37868967 PMCID: PMC10586314 DOI: 10.3389/fimmu.2023.1233085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 09/06/2023] [Indexed: 10/24/2023] Open
Abstract
In the tumor milieu of head and neck squamous cell carcinoma (HNSCC), distinct B cell subpopulations are present, which exert either pro- or anti-tumor activities. Multiple factors, including hypoxia, cytokines, interactions with tumor cells, and other immune infiltrating lymphocytes (TILs), alter the equilibrium between the dual roles of B cells leading to cancerogenesis. Certain B cell subsets in the tumor microenvironment (TME) exhibit immunosuppressive function. These cells are known as regulatory B (Breg) cells. Breg cells suppress immune responses by secreting a series of immunosuppressive cytokines, including IL-10, IL-35, TGF-β, granzyme B, and adenosine or dampen effector TILs by intercellular contacts. Multiple Breg phenotypes have been discovered in human and mouse cancer models. However, when compartmentalized within a tertiary lymphoid structure (TLS), B cells predominantly play anti-tumor effects. A mature TLS contains a CD20+ B cell zone with several important types of B cells, including germinal-center like B cells, antibody-secreting plasma cells, and memory B cells. They kill tumor cells via antibody-dependent cytotoxicity and phagocytosis, and local complement activation effects. TLSs are also privileged sites for local T and B cell coordination and activation. Nonetheless, in some cases, TLSs may serve as a niche for hidden tumor cells and indicate a bad prognosis. Thus, TIL-B cells exhibit bidirectional immune-modulatory activity and are responsive to a variety of immunotherapies. In this review, we discuss the functional distinctions between immunosuppressive Breg cells and immunogenic effector B cells that mature within TLSs with the focus on tumors of HNSCC patients. Additionally, we review contemporary immunotherapies that aim to target TIL-B cells. For the development of innovative therapeutic approaches to complement T-cell-based immunotherapy, a full understanding of either effector B cells or Breg cells is necessary.
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Affiliation(s)
- Jiantong Bao
- Department of Otorhinolaryngology and Head & Neck Surgery, University Medical Center Ulm, Head & Neck Cancer Center of the Comprehensive Cancer Center Ulm, Ulm, Germany
- School of Medicine, Southeast University, Nanjing, China
| | - Annika C. Betzler
- Department of Otorhinolaryngology and Head & Neck Surgery, University Medical Center Ulm, Head & Neck Cancer Center of the Comprehensive Cancer Center Ulm, Ulm, Germany
| | - Jochen Hess
- Department of Otorhinolaryngology, Head and Neck Surgery, Heidelberg University Hospital, Heidelberg, Germany
- Molecular Mechanisms of Head and Neck Tumors, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Cornelia Brunner
- Department of Otorhinolaryngology and Head & Neck Surgery, University Medical Center Ulm, Head & Neck Cancer Center of the Comprehensive Cancer Center Ulm, Ulm, Germany
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6
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Stagg J, Golden E, Wennerberg E, Demaria S. The interplay between the DNA damage response and ectonucleotidases modulates tumor response to therapy. Sci Immunol 2023; 8:eabq3015. [PMID: 37418547 PMCID: PMC10394739 DOI: 10.1126/sciimmunol.abq3015] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 06/14/2023] [Indexed: 07/09/2023]
Abstract
The extracellular nucleoside adenosine reduces tissue inflammation and is generated by irreversible dephosphorylation of adenosine monophosphate (AMP) mediated by the ectonucleotidase CD73. The pro-inflammatory nucleotides adenosine triphosphate, nicotinamide adenine dinucleotide, and cyclic guanosine -monophosphate-AMP (cGAMP), which are produced in the tumor microenvironment (TME) during therapy-induced immunogenic cell death and activation of innate immune signaling, can be converted into AMP by ectonucleotidases CD39, CD38, and CD203a/ENPP1. Thus, ectonucleotidases shape the TME by converting immune-activating signals into an immunosuppressive one. Ectonucleotidases also hinder the ability of therapies including radiation therapy, which enhance the release of pro-inflammatory nucleotides in the extracellular milieu, to induce immune-mediated tumor rejection. Here, we review the immunosuppressive effects of adenosine and the role of different ectonucleotidases in modulating antitumor immune responses. We discuss emerging opportunities to target adenosine generation and/or its ability to signal via adenosine receptors expressed by immune and cancer cells in the context of combination immunotherapy and radiotherapy.
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Affiliation(s)
- John Stagg
- Centre de Recherche du Centre Hospitalier de
l’Université de Montréal, 900 St-Denis street, Montreal,
Quebec, Canada, H2X 0A9
| | - Encouse Golden
- Department of Radiation Oncology, Weill Cornell Medicine,
New York, NY 10065, USA
| | - Erik Wennerberg
- Division of Radiotherapy and Imaging, Institute of Cancer
Research, London SM2 5NG, UK
| | - Sandra Demaria
- Department of Radiation Oncology, Weill Cornell Medicine,
New York, NY 10065, USA
- Department of Pathology and Laboratory Medicine, Weill
Cornell Medicine, New York, NY, 10065, USA
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7
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Krämer J, Bar-Or A, Turner TJ, Wiendl H. Bruton tyrosine kinase inhibitors for multiple sclerosis. Nat Rev Neurol 2023; 19:289-304. [PMID: 37055617 PMCID: PMC10100639 DOI: 10.1038/s41582-023-00800-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/2023] [Indexed: 04/15/2023]
Abstract
Current therapies for multiple sclerosis (MS) reduce both relapses and relapse-associated worsening of disability, which is assumed to be mainly associated with transient infiltration of peripheral immune cells into the central nervous system (CNS). However, approved therapies are less effective at slowing disability accumulation in patients with MS, in part owing to their lack of relevant effects on CNS-compartmentalized inflammation, which has been proposed to drive disability. Bruton tyrosine kinase (BTK) is an intracellular signalling molecule involved in the regulation of maturation, survival, migration and activation of B cells and microglia. As CNS-compartmentalized B cells and microglia are considered central to the immunopathogenesis of progressive MS, treatment with CNS-penetrant BTK inhibitors might curtail disease progression by targeting immune cells on both sides of the blood-brain barrier. Five BTK inhibitors that differ in selectivity, strength of inhibition, binding mechanisms and ability to modulate immune cells within the CNS are currently under investigation in clinical trials as a treatment for MS. This Review describes the role of BTK in various immune cells implicated in MS, provides an overview of preclinical data on BTK inhibitors and discusses the (largely preliminary) data from clinical trials.
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Affiliation(s)
- Julia Krämer
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster, Germany
| | - Amit Bar-Or
- Center for Neuroinflammation and Neurotherapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Heinz Wiendl
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster, Germany.
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8
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Kowash RR, Akbay EA. Tumor intrinsic and extrinsic functions of CD73 and the adenosine pathway in lung cancer. Front Immunol 2023; 14:1130358. [PMID: 37033953 PMCID: PMC10079876 DOI: 10.3389/fimmu.2023.1130358] [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: 12/23/2022] [Accepted: 03/13/2023] [Indexed: 04/11/2023] Open
Abstract
The adenosine pathway is an exciting new target in the field of cancer immunotherapy. CD73 is the main producer of extracellular adenosine. Non-small cell lung cancer (NSCLC) has one of the highest CD73 expression signatures among all cancer types and the presence of common oncogenic drivers of NSCLC, such as mutant epidermal growth factor receptor (EGFR) and KRAS, correlate with increased CD73 expression. Current immune checkpoint blockade (ICB) therapies only benefit a subset of patients, and it has proved challenging to understand which patients might respond even with the current understanding of predictive biomarkers. The adenosine pathway is well known to disrupt cytotoxic function of T cells, which is currently the main target of most clinical agents. Data thus far suggests that combining ICB therapies already in the clinic with adenosine pathway inhibitors provides promise for the treatment of lung cancer. However, antigen loss or lack of good antigens limits efficacy of ICB; simultaneous activation of other cytotoxic immune cells such as natural killer (NK) cells can be explored in these tumors. Clinical trials harnessing both T and NK cell activating treatments are still in their early stages with results expected in the coming years. In this review we provide an overview of new literature on the adenosine pathway and specifically CD73. CD73 is thought of mainly for its role as an immune modulator, however recent studies have demonstrated the tumor cell intrinsic properties of CD73 are potentially as important as its role in immune suppression. We also highlight the current understanding of this pathway in lung cancer, outline ongoing studies examining therapies in combination with adenosine pathway targeting, and discuss future prospects.
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Affiliation(s)
- Ryan R. Kowash
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, United States
- Simmons Comprehensive Cancer Center, Dallas, TX, United States
| | - Esra A. Akbay
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, United States
- Simmons Comprehensive Cancer Center, Dallas, TX, United States
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9
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Ruffin AT, Li H, Vujanovic L, Zandberg DP, Ferris RL, Bruno TC. Improving head and neck cancer therapies by immunomodulation of the tumour microenvironment. Nat Rev Cancer 2023; 23:173-188. [PMID: 36456755 PMCID: PMC9992112 DOI: 10.1038/s41568-022-00531-9] [Citation(s) in RCA: 52] [Impact Index Per Article: 52.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/18/2022] [Indexed: 12/03/2022]
Abstract
Targeted immunotherapy has improved patient survival in head and neck squamous cell carcinoma (HNSCC), but less than 20% of patients produce a durable response to these treatments. Thus, new immunotherapies that consider all key players of the complex HNSCC tumour microenvironment (TME) are necessary to further enhance tumour-specific T cell responses in patients. HNSCC is an ideal tumour type in which to evaluate immune and non-immune cell differences because of two distinct TME aetiologies (human papillomavirus (HPV)-positive and HPV-negative disease), multiple anatomic sites for tumour growth, and clear distinctions between patients with locally advanced disease and those with recurrent and/or metastatic disease. Recent technological and scientific advancements have provided a more complete picture of all cellular constituents within this complex TME and have evaluated the interplay of both immune and non-immune cells within HNSCC. Here, we include a comprehensive analysis of the complete ecosystem of the HNSCC TME, performed utilizing data-rich resources such as The Cancer Genome Atlas, and cutting-edge techniques, such as single-cell RNA sequencing, high-dimensional flow cytometry and spatial multispectral imaging, to generate improved treatment strategies for this diverse disease.
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Affiliation(s)
- Ayana T Ruffin
- UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA
- Tumour Microenvironment Center, UPMC Hillman Cancer Center, Pittsburgh, PA, USA
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
- Graduate Program of Microbiology and Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Housaiyin Li
- UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA
- Tumour Microenvironment Center, UPMC Hillman Cancer Center, Pittsburgh, PA, USA
- Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Molecular Genetics and Developmental Biology (MGDB) Graduate Program, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Lazar Vujanovic
- UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA
- Tumour Microenvironment Center, UPMC Hillman Cancer Center, Pittsburgh, PA, USA
- Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Dan P Zandberg
- UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA
- Tumour Microenvironment Center, UPMC Hillman Cancer Center, Pittsburgh, PA, USA
| | - Robert L Ferris
- UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA.
- Tumour Microenvironment Center, UPMC Hillman Cancer Center, Pittsburgh, PA, USA.
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA.
- Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA, USA.
| | - Tullia C Bruno
- UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA.
- Tumour Microenvironment Center, UPMC Hillman Cancer Center, Pittsburgh, PA, USA.
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA.
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10
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Galán-Ortíz JR, Andino del Valle KA, Pérez-Rosario AA, Castañón Pereira DL, Díaz-Rivera J, Merheb-Finianos PA, Dorta-Estremera SM. B cells as modulators of HPV+ oropharyngeal cancer in a preclinical model. Front Oncol 2023; 13:1145724. [PMID: 37035195 PMCID: PMC10076859 DOI: 10.3389/fonc.2023.1145724] [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: 01/16/2023] [Accepted: 02/28/2023] [Indexed: 04/11/2023] Open
Abstract
Among the different immune cells present within tumors, B cells also infiltrate human papillomavirus-positive (HPV+) oropharyngeal tumors. However, the role of B cells during programmed death-1 (PD-1) blockade in HPV+ oropharyngeal cancer needs to be better defined. By using the preclinical mouse model for HPV+ oropharyngeal cancer (named mEER), we characterized B cells within tumors and determined their functional role in vivo during PD-1 blockade. We determined that treatment naïve tongue-implanted tumors, which we have previously demonstrated to be sensitive to PD-1 blockade, contained high infiltration of CD8+ T cells and low infiltration of B cells whereas flank-implanted tumors, which are resistant to PD-1 blockade, contain a higher frequency of B cells compared to T cells. Moreover, B cell-deficient mice (µMt) and B cell-depleted mice showed a slower tumor growth rate compared to wild-type (WT) mice, and B cell deficiency increased CD8+ T cell infiltration in tumors. When we compared tongue tumor-bearing mice treated with anti-PD-1, we observed that tumors that responded to the therapy contained more T cells and B cells than the ones that did not respond. However, µMt mice treated with PD-1 blockade showed similar tumor growth rates to WT mice. Our data suggest that in untreated mice, B cells have a more pro-tumorigenic phenotype potentially affecting T cell infiltration in the tumors. In contrast, B cells are dispensable for PD-1 blockade efficacy. Mechanistic studies are needed to identify novel targets to promote the anti-tumorigenic function and/or suppress the immunosuppressive function of B cells in HPV+ oropharyngeal cancer.
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Affiliation(s)
- Jorge R. Galán-Ortíz
- Cancer Biology Division, Comprehensive Cancer Center, University of Puerto Rico, San Juan, Puerto Rico
| | - Kamila A. Andino del Valle
- Microbiology and Medical Zoology Department, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico
| | | | | | - Jennifer Díaz-Rivera
- Microbiology and Medical Zoology Department, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico
| | | | - Stephanie M. Dorta-Estremera
- Cancer Biology Division, Comprehensive Cancer Center, University of Puerto Rico, San Juan, Puerto Rico
- Microbiology and Medical Zoology Department, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico
- *Correspondence: Stephanie M. Dorta-Estremera,
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11
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Nucleoside transporters and immunosuppressive adenosine signaling in the tumor microenvironment: Potential therapeutic opportunities. Pharmacol Ther 2022; 240:108300. [PMID: 36283452 DOI: 10.1016/j.pharmthera.2022.108300] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 10/17/2022] [Accepted: 10/19/2022] [Indexed: 11/30/2022]
Abstract
Adenosine compartmentalization has a profound impact on immune cell function by regulating adenosine localization and, therefore, extracellular signaling capabilities, which suppresses immune cell function in the tumor microenvironment. Nucleoside transporters, responsible for the translocation and cellular compartmentalization of hydrophilic adenosine, represent an understudied yet crucial component of adenosine disposition in the tumor microenvironment. In this review article, we will summarize what is known regarding nucleoside transporter's function within the purinome in relation to currently devised points of intervention (i.e., ectonucleotidases, adenosine receptors) for cancer immunotherapy, alterations in nucleoside transporter expression reported in cancer, and potential avenues for targeting of nucleoside transporters for the desired modulation of adenosine compartmentalization and action. Further, we put forward that nucleoside transporters are an unexplored therapeutic opportunity, and modulation of nucleoside transport processes could attenuate the pathogenic buildup of immunosuppressive adenosine in solid tumors, particularly those enriched with nucleoside transport proteins.
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12
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Differential Immunomodulatory Effects of Head and Neck Cancer-Derived Exosomes on B Cells in the Presence of ATP. Int J Mol Sci 2022; 23:ijms232214446. [PMID: 36430925 PMCID: PMC9693630 DOI: 10.3390/ijms232214446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/13/2022] [Accepted: 11/17/2022] [Indexed: 11/22/2022] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is an aggressive malignancy. Tumor-derived exosomes (TEX) have immunoregulatory properties. Adenosine triphosphate (ATP) and its immunosuppressive precursor adenosine (ADO) have been found in cancerous tissue. We investigated the effect of TEX on B cells in the presence of ATP. TEX were isolated from human HNSCC cell line (PCI-13) cultures and co-cultured with peripheral blood B cells of healthy donors, with or without TEX in different concentrations and with or without a low (20 µM) or high (2000 µM) ATP dose. We were able to demonstrate that TEX inhibit B-cell proliferation. The addition of TEX to either ATP concentration showed a decreasing trend in CD39 expression on B cells in a dose-dependent manner. High ATP levels (2000 µM) increased apoptosis and necrosis, and analysis of apoptosis-associated proteins revealed dose-dependent effects of ATP, which were modified by TEX. Altogether, TEX exhibited dual immunomodulatory effects on B cells. TEX were immunosuppressive by inhibiting B-cell proliferation; they were immunostimulatory by downregulating CD39 expression. Furthermore, TEX were able to modulate the expression of pro- and anti-apoptotic proteins. In conclusion, our data indicate that TEX play an important, but complex, role in the tumor microenvironment.
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13
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Jumaniyazova E, Lokhonina A, Dzhalilova D, Kosyreva A, Fatkhudinov T. Immune Cells in Head-and-Neck Tumor Microenvironments. J Pers Med 2022; 12:jpm12091521. [PMID: 36143308 PMCID: PMC9506052 DOI: 10.3390/jpm12091521] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 09/09/2022] [Accepted: 09/13/2022] [Indexed: 11/16/2022] Open
Abstract
Head-and-neck cancers constitute a heterogeneous group of aggressive tumors with high incidence and low survival rates, collectively being the sixth most prevalent cancer type globally. About 90% of head-and-neck cancers are classified as squamous cell carcinomas (HNSCC). The innate and adaptive immune systems, indispensable for anti-cancer immune surveillance, largely define the rates of HNSCC emergence and progression. HNSCC microenvironments harbor multiple cell types that infiltrate the tumors and interact both with tumor cells and among themselves. Gradually, tumor cells learn to manipulate the immune system, either by adapting their own immunogenicity or through the release of immunosuppressive molecules. These interactions continuously evolve and shape the tumor microenvironment, both structurally and functionally, facilitating angiogenesis, proliferation and metastasis. Our understanding of this evolution is directly related to success in the development of advanced therapies. This review focuses on the key mechanisms that rule HNSCC infiltration, featuring particular immune cell types and their roles in the pathogenesis. A close focus on the tumor-immunity interactions will help identify new immunotherapeutic targets in patients with HNSCC.
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Affiliation(s)
- Enar Jumaniyazova
- Department of Histology, Cytology and Embryology, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
- Correspondence: ; Tel.: +7-9254258360
| | - Anastasiya Lokhonina
- Department of Histology, Cytology and Embryology, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
- National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, 4 Oparina Street, 117997 Moscow, Russia
| | - Dzhuliia Dzhalilova
- Department of Histology, Cytology and Embryology, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
- Avtsyn Research Institute of Human Morphology of Petrovsky National Research Centre of Surgery, 3 Tsyurupy Street, 117418 Moscow, Russia
| | - Anna Kosyreva
- Department of Histology, Cytology and Embryology, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
- Avtsyn Research Institute of Human Morphology of Petrovsky National Research Centre of Surgery, 3 Tsyurupy Street, 117418 Moscow, Russia
| | - Timur Fatkhudinov
- Department of Histology, Cytology and Embryology, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
- Avtsyn Research Institute of Human Morphology of Petrovsky National Research Centre of Surgery, 3 Tsyurupy Street, 117418 Moscow, Russia
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14
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Qin Y, Lu F, Lyu K, Chang AE, Li Q. Emerging concepts regarding pro- and anti tumor properties of B cells in tumor immunity. Front Immunol 2022; 13:881427. [PMID: 35967441 PMCID: PMC9366002 DOI: 10.3389/fimmu.2022.881427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 07/07/2022] [Indexed: 12/26/2022] Open
Abstract
Controversial views regarding the roles of B cells in tumor immunity have existed for several decades. However, more recent studies have focused on its positive properties in antitumor immunity. Many studies have demonstrated a close association of the higher density of intratumoral B cells with favorable outcomes in cancer patients. B cells can interact with T cells as well as follicular dendritic cells within tertiary lymphoid structures, where they undergo a series of biological events, including clonal expansion, somatic hypermutation, class switching, and tumor-specific antibody production, which may trigger antitumor humoral responses. After activation, B cells can function as effector cells via direct tumor-killing, antigen-presenting activity, and production of tumor-specific antibodies. At the other extreme, B cells can obtain inhibitory functions by relevant stimuli, converting to regulatory B cells, which serve as an immunosuppressive arm to tumor immunity. Here we summarize our current understanding of the bipolar properties of B cells within the tumor immune microenvironment and propose potential B cell-based immunotherapeutic strategies, which may help promote cancer immunotherapy.
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Affiliation(s)
- You Qin
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
| | - Furong Lu
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Kexing Lyu
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
- Otorhinolaryngology Hospital, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Alfred E. Chang
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
- *Correspondence: Qiao Li, ; Alfred E. Chang,
| | - Qiao Li
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
- *Correspondence: Qiao Li, ; Alfred E. Chang,
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15
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Laumont CM, Banville AC, Gilardi M, Hollern DP, Nelson BH. Tumour-infiltrating B cells: immunological mechanisms, clinical impact and therapeutic opportunities. Nat Rev Cancer 2022; 22:414-430. [PMID: 35393541 PMCID: PMC9678336 DOI: 10.1038/s41568-022-00466-1] [Citation(s) in RCA: 140] [Impact Index Per Article: 70.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/03/2022] [Indexed: 01/03/2023]
Abstract
Although immunotherapy research to date has focused largely on T cells, there is mounting evidence that tumour-infiltrating B cells and plasma cells (collectively referred to as tumour-infiltrating B lymphocytes (TIL-Bs)) have a crucial, synergistic role in tumour control. In many cancers, TIL-Bs have demonstrated strong predictive and prognostic significance in the context of both standard treatments and immune checkpoint blockade, offering the prospect of new therapeutic opportunities that leverage their unique immunological properties. Drawing insights from autoimmunity, we review the molecular phenotypes, architectural contexts, antigen specificities, effector mechanisms and regulatory pathways relevant to TIL-Bs in human cancer. Although the field is young, the emerging picture is that TIL-Bs promote antitumour immunity through their unique mode of antigen presentation to T cells; their role in assembling and perpetuating immunologically 'hot' tumour microenvironments involving T cells, myeloid cells and natural killer cells; and their potential to combat immune editing and tumour heterogeneity through the easing of self-tolerance mechanisms. We end by discussing the most promising approaches to enhance TIL-B responses in concert with other immune cell subsets to extend the reach, potency and durability of cancer immunotherapy.
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Affiliation(s)
- Céline M Laumont
- Deeley Research Centre, BC Cancer, Victoria, British Columbia, Canada
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Allyson C Banville
- Deeley Research Centre, BC Cancer, Victoria, British Columbia, Canada
- Interdisciplinary Oncology Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mara Gilardi
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute, San Diego, CA, USA
| | - Daniel P Hollern
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute, San Diego, CA, USA
| | - Brad H Nelson
- Deeley Research Centre, BC Cancer, Victoria, British Columbia, Canada.
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada.
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia, Canada.
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16
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Flores-Borja F, Blair P. "Mechanisms of induction of regulatory B cells in the tumour microenvironment and their contribution to immunosuppression and pro-tumour responses". Clin Exp Immunol 2022; 209:33-45. [PMID: 35350071 PMCID: PMC9307227 DOI: 10.1093/cei/uxac029] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 03/08/2022] [Accepted: 03/25/2022] [Indexed: 12/05/2022] Open
Abstract
The presence of tumour-infiltrating immune cells was originally associated with the induction of anti-tumour responses and good a prognosis. A more refined characterization of the tumour microenvironment has challenged this original idea and evidence now exists pointing to a critical role for immune cells in the modulation of anti-tumour responses and the induction of a tolerant pro-tumour environment. The coordinated action of diverse immunosuppressive populations, both innate and adaptive, shapes a variety of pro-tumour responses leading to tumour progression and metastasis. Regulatory B cells have emerged as critical modulators and suppressors of anti-tumour responses. As reported in autoimmunity and infection studies, Bregs are a heterogeneous population with diverse phenotypes and different mechanisms of action. Here we review recent studies on Bregs from animal models and patients, covering a variety of types of cancer. We describe the heterogeneity of Bregs, the cellular interactions they make with other immune cells and the tumour itself, and their mechanism of suppression that enables tumour escape. We also discuss the potential therapeutic tools that may inhibit Bregs function and promote anti-tumour responses.
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Affiliation(s)
- Fabian Flores-Borja
- Centre for Immunobiology and Regenerative Medicine, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, Blizard Institute, London
| | - Paul Blair
- Division of Infection & Immunity, Faculty of Medical Sciences, Department of Infection, Immunity, and Transplantation, University College London, London
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17
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Kotulová J, Hajdúch M, Džubák P. Current Adenosinergic Therapies: What Do Cancer Cells Stand to Gain and Lose? Int J Mol Sci 2021; 22:12569. [PMID: 34830449 PMCID: PMC8617980 DOI: 10.3390/ijms222212569] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/18/2021] [Accepted: 11/18/2021] [Indexed: 12/12/2022] Open
Abstract
A key objective in immuno-oncology is to reactivate the dormant immune system and increase tumour immunogenicity. Adenosine is an omnipresent purine that is formed in response to stress stimuli in order to restore physiological balance, mainly via anti-inflammatory, tissue-protective, and anti-nociceptive mechanisms. Adenosine overproduction occurs in all stages of tumorigenesis, from the initial inflammation/local tissue damage to the precancerous niche and the developed tumour, making the adenosinergic pathway an attractive but challenging therapeutic target. Many current efforts in immuno-oncology are focused on restoring immunosurveillance, largely by blocking adenosine-producing enzymes in the tumour microenvironment (TME) and adenosine receptors on immune cells either alone or combined with chemotherapy and/or immunotherapy. However, the effects of adenosinergic immunotherapy are not restricted to immune cells; other cells in the TME including cancer and stromal cells are also affected. Here we summarise recent advancements in the understanding of the tumour adenosinergic system and highlight the impact of current and prospective immunomodulatory therapies on other cell types within the TME, focusing on adenosine receptors in tumour cells. In addition, we evaluate the structure- and context-related limitations of targeting this pathway and highlight avenues that could possibly be exploited in future adenosinergic therapies.
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Affiliation(s)
| | | | - Petr Džubák
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, 779 00 Olomouc, Czech Republic; (J.K.); (M.H.)
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18
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Zhu S, Jung J, Victor E, Arceo J, Gokhale S, Xie P. Clinical Trials of the BTK Inhibitors Ibrutinib and Acalabrutinib in Human Diseases Beyond B Cell Malignancies. Front Oncol 2021; 11:737943. [PMID: 34778053 PMCID: PMC8585514 DOI: 10.3389/fonc.2021.737943] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 10/11/2021] [Indexed: 12/13/2022] Open
Abstract
The BTK inhibitors ibrutinib and acalabrutinib are FDA-approved drugs for the treatment of B cell malignances. Both drugs have demonstrated clinical efficacy and safety profiles superior to chemoimmunotherapy regimens in patients with chronic lymphocytic leukemia. Mounting preclinical and clinical evidence indicates that both ibrutinib and acalabrutinib are versatile and have direct effects on many immune cell subsets as well as other cell types beyond B cells. The versatility and immunomodulatory effects of both drugs have been exploited to expand their therapeutic potential in a wide variety of human diseases. Over 470 clinical trials are currently registered at ClinicalTrials.gov to test the efficacy of ibrutinib or acalabrutinib not only in almost every type of B cell malignancies, but also in hematological malignancies of myeloid cells and T cells, solid tumors, chronic graft versus host disease (cGHVD), autoimmune diseases, allergy and COVID-19 (http:www.clinicaltrials.gov). In this review, we present brief discussions of the clinical trials and relevant key preclinical evidence of ibrutinib and acalabrutinib as monotherapies or as part of combination therapies for the treatment of human diseases beyond B cell malignancies. Adding to the proven efficacy of ibrutinib for cGVHD, preliminary results of clinical trials have shown promising efficacy of ibrutinib or acalabrutinib for certain T cell malignancies, allergies and severe COVID-19. However, both BTK inhibitors have no or limited efficacy for refractory or recurrent solid tumors. These clinical data together with additional pending results from ongoing trials will provide valuable information to guide the design and improvement of future trials, including optimization of combination regimens and dosing sequences as well as better patient stratification and more efficient delivery strategies. Such information will further advance the precise implementation of BTK inhibitors into the clinical toolbox for the treatment of different human diseases.
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Affiliation(s)
- Sining Zhu
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States.,Graduate Program in Cellular and Molecular Pharmacology, Rutgers University, Piscataway, NJ, United States
| | - Jaeyong Jung
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States.,Graduate Program in Cellular and Molecular Pharmacology, Rutgers University, Piscataway, NJ, United States
| | - Eton Victor
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States
| | - Johann Arceo
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States
| | - Samantha Gokhale
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States.,Graduate Program in Cellular and Molecular Pharmacology, Rutgers University, Piscataway, NJ, United States
| | - Ping Xie
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States.,Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States
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19
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Gavrielatou N, Vathiotis I, Economopoulou P, Psyrri A. The Role of B Cells in Head and Neck Cancer. Cancers (Basel) 2021; 13:cancers13215383. [PMID: 34771546 PMCID: PMC8582491 DOI: 10.3390/cancers13215383] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 01/13/2023] Open
Abstract
Simple Summary Host immunity has established its role in deciding the course of cancer evolution. As cellular and molecular components in the tumor microenvironment peripherally appear to be at a constant interplay, favoring either tumor control or progression, it is vital to decrypt the immunity elements, which demonstrate the potential to be harnessed towards cancer elimination. Head and neck cancer has been characterized as densely immune infiltrated but at the same time a highly immunosuppressive malignancy due to a negative equilibrium between active and dysfunctional immune cell populations. B-cells constitute the cornerstone of humoral immunity; however, their role in cancer has been vastly overlooked in comparison to other immune subtypes and reports from multiple studies fail to show agreement on their prognostic impact. This review focuses on the role of B-cells on head and neck cancer with the aim to highlight their effect on anti-cancer immunity, as well as their possible impact on immunotherapy outcomes. Abstract Head and neck cancer comprises a heterogenous, highly immune infiltrated malignancy, defined by a predominantly immunosuppressive tumor microenvironment (TME). In recent years, PD-1/PD-L1 immune checkpoint inhibitors have become the standard of care treatment, either as monotherapy or in combination with chemotherapy agents, thus revolutionizing the therapeutic landscape of recurrent/metastatic disease. As a result, preclinical research is increasingly focusing on TME composition and pathophysiology, aiming to comprehensively characterize the specific elements and interactions affecting anti-tumor immunity, as well as to unveil novel predictive biomarkers of immunotherapy outcomes. While T lymphocytic populations have been vastly explored regarding their effect on cancer development, B-cells constitute a far less investigated, yet possibly equally important, aspect of cancer immunity. B-cell presence, either as single cells or as part of tertiary lymphoid structures within the TME, has been associated with several anti-tumor defense mechanisms, such as antigen presentation, antibody production and participation in antibody-dependent cellular cytotoxicity, and has demonstrated prognostic significance for multiple types of malignancies. However, immunoregulatory B-cell phenotypes have also been identified both peripherally and within malignant tissue, bearing inhibitory effects on numerous immune response processes. Consequently, B-cells and their subsets demonstrate the potential to become valuable cancer biomarkers and acquire a leading role in future therapeutic strategies.
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Affiliation(s)
- Niki Gavrielatou
- Department of Pathology, School of Medicine, Yale University, New Haven, CT 06510, USA; (N.G.); (I.V.)
| | - Ioannis Vathiotis
- Department of Pathology, School of Medicine, Yale University, New Haven, CT 06510, USA; (N.G.); (I.V.)
| | - Panagiota Economopoulou
- Section of Medical Oncology, Second Department of Internal Medicine, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece;
| | - Amanda Psyrri
- Section of Medical Oncology, Second Department of Internal Medicine, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece;
- Correspondence:
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20
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Sá JDO, Trino LD, Oliveira AK, Lopes AFB, Granato DC, Normando AGC, Santos ES, Neves LX, Carnielli CM, Paes Leme AF. Proteomic approaches to assist in diagnosis and prognosis of oral cancer. Expert Rev Proteomics 2021; 18:261-284. [PMID: 33945368 DOI: 10.1080/14789450.2021.1924685] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Introduction: Oral squamous cell carcinoma (OSCC) ranks among the top 10 leading causes of cancer worldwide, with 5-year survival rate of about 50%, high lymph node metastasis, and relapse rates. The OSCC diagnosis, prognosis, and treatment are mostly based on the clinical TNM classification. There is an urgent need for the discovery of biomarkers and therapeutic targets to assist in the clinical decision-making process.Areas covered: We summarize proteomic studies of the OSCC tumor, immune microenvironment, potential liquid biopsy sites, and post-translational modifications trying to retrieve information in the discovery and verification or (pre)validation phases. The search strategy was based on the combination of MeSH terms and expert refinement.Expert opinion: Untargeted combined with targeted proteomics are strategies that provide reliable and reproducible quantitation of proteins and are the methods of choice of many groups worldwide. Undoubtedly, proteomics has been contributing to the understanding of OSCC progression and uncovers potential candidates as biomarker or therapeutic targets. Nevertheless, none of these targets are available in the clinical practice yet. The scientific community needs to overcome the limitations by investing in robust experimental designs to strengthen the value of the findings, leveraging the translation of knowledge, and further supporting clinical decisions.
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Affiliation(s)
- Jamile De Oliveira Sá
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil.,Departamento De Diagnóstico Oral, Faculdade De Odontologia De Piracicaba, Universidade Estadual De Campinas (UNICAMP), Piracicaba, Brazil
| | - Luciana Daniele Trino
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil
| | - Ana Karina Oliveira
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil
| | - Ariane Fidelis Busso Lopes
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil
| | - Daniela Campos Granato
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil
| | - Ana Gabriela Costa Normando
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil.,Departamento De Diagnóstico Oral, Faculdade De Odontologia De Piracicaba, Universidade Estadual De Campinas (UNICAMP), Piracicaba, Brazil
| | - Erison Santana Santos
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil.,Departamento De Diagnóstico Oral, Faculdade De Odontologia De Piracicaba, Universidade Estadual De Campinas (UNICAMP), Piracicaba, Brazil
| | - Leandro Xavier Neves
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil
| | - Carolina Moretto Carnielli
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil
| | - Adriana Franco Paes Leme
- Laboratório Nacional De Biociências (Lnbio), Centro Nacional De Pesquisa Em Energia E Materiais (CNPEM), Campinas, Brazil
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21
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Kulkarni A, Bowers LW. The role of immune dysfunction in obesity-associated cancer risk, progression, and metastasis. Cell Mol Life Sci 2021; 78:3423-3442. [PMID: 33464384 PMCID: PMC11073382 DOI: 10.1007/s00018-020-03752-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/10/2020] [Accepted: 12/28/2020] [Indexed: 02/07/2023]
Abstract
Obesity has been linked to an increased risk of and a worse prognosis for several types of cancer. A number of interrelated mediators contribute to obesity's pro-tumor effects, including chronic adipose inflammation and other perturbations of immune cell development and function. Here, we review studies examining the impact of obesity-induced immune dysfunction on cancer risk and progression. While the role of adipose tissue inflammation in obesity-associated cancer risk has been well characterized, the effects of obesity on immune cell infiltration and activity within the tumor microenvironment are not well studied. In this review, we aim to highlight the impact of both adipose-mediated inflammatory signaling and intratumoral immunosuppressive signaling in obesity-induced cancer risk, progression, and metastasis.
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Affiliation(s)
- Aneesha Kulkarni
- Department of Nutrition Science, College of Health and Human Sciences, Purdue University, West Lafayette, IN, 47906, USA
| | - Laura W Bowers
- Department of Nutrition Science, College of Health and Human Sciences, Purdue University, West Lafayette, IN, 47906, USA.
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22
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Characterization and Differentiation of the Tumor Microenvironment (TME) of Orthotopic and Subcutaneously Grown Head and Neck Squamous Cell Carcinoma (HNSCC) in Immunocompetent Mice. Int J Mol Sci 2020; 22:ijms22010247. [PMID: 33383676 PMCID: PMC7796118 DOI: 10.3390/ijms22010247] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/20/2020] [Accepted: 12/24/2020] [Indexed: 12/12/2022] Open
Abstract
For the development and evaluation of new head and neck squamous cell carcinoma (HNSCC) therapeutics, suitable, well-characterized animal models are needed. Thus, by analyzing orthotopic versus subcutaneous models of HNSCC in immunocompetent mice, we evaluated the existence of adenosine-related immunosuppressive B- and T lymphocyte populations within the tumor microenvironment (TME). Applying the SCC VII model for the induction of HNSCC in immunocompetent C3H/HeN mice, the cellular TME was characterized after tumor initiation over time by flow cytometry. The TME in orthotopic grown tumors revealed a larger population of tumor-infiltrating lymphocytes (TIL) with more B cells and CD4+ T cells than the subcutaneously grown tumors. Immune cell populations in the blood and bone marrow showed a rather distinct reaction toward tumor induction and tumor location compared to the spleen, lymph nodes, or thymus. In addition, large numbers of immunosuppressive B- and T cells were identified within the TME but also in secondary lymphoid organs, independently of the tumor initiation site. The altered immunogenic TME may influence the response to any treatment attempt. Moreover, when analyzing the TME and other lymphoid organs of tumor-bearing mice, we observed conditions reflecting largely those of patients suffering from HNSCC suggesting the C3H/HeN mouse model as a suitable tool for studies aiming to target immunosuppression to improve anti-cancer therapies.
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23
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Shang J, Zha H, Sun Y. Phenotypes, Functions, and Clinical Relevance of Regulatory B Cells in Cancer. Front Immunol 2020; 11:582657. [PMID: 33193391 PMCID: PMC7649814 DOI: 10.3389/fimmu.2020.582657] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 10/02/2020] [Indexed: 12/11/2022] Open
Abstract
In immune system, B cells are classically positive modulators that regulate inflammation and immune responses. Regulatory B cells (Bregs) are a subset of B cells which play crucial roles in various conditions, including infection, allergies, autoimmune diseases, transplantation, and tumors. Until now, unequivocal surface markers for Bregs still lack consensus, although numerous Breg subsets have been identified. Generally, Bregs exert their immunoregulatory functions mainly through cytokine secretion and intercellular contact. In the tumor microenvironment, Bregs suppress effector T cells, induce regulatory T cells and target other tumor-infiltrating immune cells, such as myeloid-derived suppressor cells, natural killer cells and macrophages, to hamper anti-tumor immunity. Meanwhile, the cross-regulations between Bregs and tumor cells often result in tumor escape from immunosurveillance. In addition, accumulating evidence suggests that Bregs are closely associated with many clinicopathological factors of cancer patients and might be potential biomarkers for accessing patient survival. Thus, Bregs are potential therapeutic targets for future immunotherapy in cancer patients. In this review, we will discuss the phenotypes, functions, and clinical relevance of Bregs in cancer.
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Affiliation(s)
- Jin Shang
- Department of Health Service, Guard Bureau of the Joint Staff Department, Central Military Commission of PLA, Beijing, China
| | - Haoran Zha
- Department of Oncology, PLA Rocket Force Characteristic Medical Center, Beijing, China
| | - Yufa Sun
- Department of Health Service, Guard Bureau of the Joint Staff Department, Central Military Commission of PLA, Beijing, China
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24
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Turner RJ, Geraghty NJ, Williams JG, Ly D, Brungs D, Carolan MG, Guy TV, Watson D, de Leon JF, Sluyter R. Comparison of peripheral blood mononuclear cell isolation techniques and the impact of cryopreservation on human lymphocytes expressing CD39 and CD73. Purinergic Signal 2020; 16:389-401. [PMID: 32754836 DOI: 10.1007/s11302-020-09714-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 07/07/2020] [Indexed: 12/19/2022] Open
Abstract
CD39 and CD73 are ecto-nucleotidases present on human peripheral blood mononuclear cells (PBMCs) and are emerging biomarkers on these cells in various disorders including cancer. Many factors influence PBMC quality, so it is essential to validate sample processing methods prior to incorporation in clinical studies. This study examined the impact of both PBMC cryopreservation and PBMC isolation using SepMate density gradient centrifugation on CD39 and CD73 expressing subsets. First, PBMCs were isolated from the peripheral blood of 11 healthy donors by routine Ficoll-Paque density gradient centrifugation, cryopreserved and compared with freshly isolated PBMCs by flow cytometry. The proportions of T and B cells expressing combinations of CD39 and CD73 were relatively stable over 6-month cryopreservation, although some T cell combinations revealed small but significant changes. Second, peripheral blood was collected from six healthy donors to compare PBMCs isolated by SepMate or Ficoll-Paque density gradient centrifugation. Compared with Ficoll-Paque, the more rapid SepMate method yielded 9.1% less PBMCs but did not alter cell viability or proportions of T and B cells expressing combinations of CD39 and CD73. The present study reveals that cryopreservation is suitable for studying T and B cells expressing combinations of CD39 and CD73. However, caution should be exercised when observing small differences in these cryopreserved subsets between different cohorts. Further, SepMate and Ficoll-Paque methods of PBMC isolation show similar results for T and B cell subset analysis; however, SepMate is a faster and easier approach.
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Affiliation(s)
- Ross J Turner
- Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia.,Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW, 2522, Australia.,CONCERT - Centre for Oncology Education and Research Translation, Liverpool, NSW, 2170, Australia
| | - Nicholas J Geraghty
- Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia.,Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Jonathan G Williams
- Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia.,Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Diane Ly
- Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia.,Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Daniel Brungs
- Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia.,CONCERT - Centre for Oncology Education and Research Translation, Liverpool, NSW, 2170, Australia.,Illawarra Cancer Care Centre, Wollongong Hospital, Wollongong, NSW, 2500, Australia
| | - Martin G Carolan
- Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia.,CONCERT - Centre for Oncology Education and Research Translation, Liverpool, NSW, 2170, Australia.,Illawarra Cancer Care Centre, Wollongong Hospital, Wollongong, NSW, 2500, Australia
| | - Thomas V Guy
- Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia
| | - Debbie Watson
- Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia.,Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW, 2522, Australia.,CONCERT - Centre for Oncology Education and Research Translation, Liverpool, NSW, 2170, Australia
| | - Jeremiah F de Leon
- Illawarra Cancer Care Centre, Wollongong Hospital, Wollongong, NSW, 2500, Australia.,GenesisCare, St Vincent's Clinic, Darlinghurst, NSW, 2010, Australia
| | - Ronald Sluyter
- Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia. .,Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW, 2522, Australia. .,CONCERT - Centre for Oncology Education and Research Translation, Liverpool, NSW, 2170, Australia.
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25
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Schroeder JC, Puntigam L, Hofmann L, Jeske SS, Beccard IJ, Doescher J, Laban S, Hoffmann TK, Brunner C, Theodoraki MN, Schuler PJ. Circulating Exosomes Inhibit B Cell Proliferation and Activity. Cancers (Basel) 2020; 12:cancers12082110. [PMID: 32751214 PMCID: PMC7464446 DOI: 10.3390/cancers12082110] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/19/2020] [Accepted: 07/24/2020] [Indexed: 12/13/2022] Open
Abstract
(1) Background: Head and neck squamous cell carcinoma (HNSCC) is characterized by a distinctive suppression of the anti-tumor immunity, both locally in the tumor microenvironment (TME) and the periphery. Tumor-derived exosomes mediate this immune suppression by directly suppressing T effector function and by inducing differentiation of regulatory T cells. However, little is known about the effects of exosomes on B cells. (2) Methods: Peripheral B cells from healthy donors and HNSCC patients were isolated and checkpoint receptor expression was analyzed by flow cytometry. Circulating exosomes were isolated from the plasma of HNSCC patients (n = 21) and healthy individuals (n = 10) by mini size-exclusion chromatography. B cells from healthy individuals were co-cultured with isolated exosomes for up to 4 days. Proliferation, viability, surface expression of checkpoint receptors, and intracellular signaling were analyzed in B cells by flow cytometry. (3) Results: Expression of the checkpoint receptors PD-1 and LAG3 was increased on B cells from HNSCC patients. The protein concentration of circulating exosomes was increased in HNSCC patients as compared to healthy donors. Both exosomes from healthy individuals and HNSCC patients inhibited B cell proliferation and survival, in vitro. Surface expression of inhibitory and stimulatory checkpoint receptors on B cells was modulated in co-culture with exosomes. In addition, an inhibitory effect of exosomes on B cell receptor (BCR) signaling was demonstrated in B cells. (4) Conclusions: Plasma-derived exosomes show inhibitory effects on the function of healthy B cells. Interestingly, these inhibitory effects are similar between exosomes from healthy individuals and HNSCC patients, suggesting a physiological B cell inhibitory role of circulating exosomes.
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