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Wu T, Wang L, Gao C, Jian C, Liu Y, Fu Z, Shi C. Treg-Derived Extracellular Vesicles: Roles in Diseases and Theranostics. Mol Pharm 2024; 21:2659-2672. [PMID: 38695194 DOI: 10.1021/acs.molpharmaceut.4c00233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Regulatory T cells (Tregs), a subset of CD4+ T cells, are indispensable in maintaining immune self-tolerance and have been utilized in various diseases. Treg-derived extracellular vesicles (Treg-EVs) have been discovered to play an important role in the mechanism of Treg functions. As cell-derived membranous particles, EVs carry multiple bioactive substances that possess tremendous potential for theranostics. Treg-EVs are involved in numerous physiological and pathological processes, carrying proteins and miRNAs inherited from the parental cells. To comprehensively understand the function of Treg-EVs, here we reviewed the classification of Treg-EVs, the active molecules in Treg-EVs, their various applications in diseases, and the existing challenges for Treg-EVs based theranostics. This Review aims to clarify the feasibility and potential of Treg-EVs in diseases and theranostics, facilitating further research and application of Treg-EVs.
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Affiliation(s)
- Tingting Wu
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Hubei Province Clinical Research Center for Precision Medicine for Critical Illness, Wuhan, 430022, China
| | - Lulu Wang
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Hubei Province Clinical Research Center for Precision Medicine for Critical Illness, Wuhan, 430022, China
| | - Chen Gao
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Hubei Province Clinical Research Center for Precision Medicine for Critical Illness, Wuhan, 430022, China
| | - Chen Jian
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Hubei Province Clinical Research Center for Precision Medicine for Critical Illness, Wuhan, 430022, China
| | - Yajing Liu
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Hubei Province Clinical Research Center for Precision Medicine for Critical Illness, Wuhan, 430022, China
| | - Zhiwen Fu
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Hubei Province Clinical Research Center for Precision Medicine for Critical Illness, Wuhan, 430022, China
| | - Chen Shi
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Hubei Province Clinical Research Center for Precision Medicine for Critical Illness, Wuhan, 430022, China
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2
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Gootjes C, Zwaginga JJ, Roep BO, Nikolic T. Defining Human Regulatory T Cells beyond FOXP3: The Need to Combine Phenotype with Function. Cells 2024; 13:941. [PMID: 38891073 PMCID: PMC11172350 DOI: 10.3390/cells13110941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/18/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024] Open
Abstract
Regulatory T cells (Tregs) are essential to maintain immune homeostasis by promoting self-tolerance. Reduced Treg numbers or functionality can lead to a loss of tolerance, increasing the risk of developing autoimmune diseases. An overwhelming variety of human Tregs has been described, based on either specific phenotype, tissue compartment, or pathological condition, yet the bulk of the literature only addresses CD25-positive and CD127-negative cells, coined by naturally occurring Tregs (nTregs), most of which express the transcription factor Forkhead box protein 3 (FOXP3). While the discovery of FOXP3 was seminal to understanding the origin and biology of nTregs, there is evidence in humans that not all T cells expressing FOXP3 are regulatory, and that not all Tregs express FOXP3. Namely, the activation of human T cells induces the transient expression of FOXP3, irrespective of whether they are regulatory or inflammatory effectors, while some induced T cells that may be broadly defined as Tregs (e.g., Tr1 cells) typically lack demethylation and do not express FOXP3. Furthermore, it is unknown whether and how many nTregs exist without FOXP3 expression. Several other candidate regulatory molecules, such as GITR, Lag-3, GARP, GPA33, Helios, and Neuropilin, have been identified but subsequently discarded as Treg-specific markers. Multiparametric analyses have uncovered a plethora of Treg phenotypes, and neither single markers nor combinations thereof can define all and only Tregs. To date, only the functional capacity to inhibit immune responses defines a Treg and distinguishes Tregs from inflammatory T cells (Teffs) in humans. This review revisits current knowledge of the Treg universe with respect to their heterogeneity in phenotype and function. We propose that it is unavoidable to characterize human Tregs by their phenotype in combination with their function, since phenotype alone does not unambiguously define Tregs. There is an unmet need to align the expression of specific markers or combinations thereof with a particular suppressive function to coin functional Treg entities and categorize Treg diversity.
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Affiliation(s)
- Chelsea Gootjes
- Laboratory of Immunomodulation and Regenerative Cell Therapy, Department of Internal Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (J.J.Z.); (T.N.)
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3
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Menzel S, Duan Y, Hambach J, Albrecht B, Wendt-Cousin D, Winzer R, Tolosa E, Rissiek A, Guse AH, Haag F, Magnus T, Koch-Nolte F, Rissiek B. Generation and characterization of antagonistic anti-human CD39 nanobodies. Front Immunol 2024; 15:1328306. [PMID: 38590528 PMCID: PMC11000232 DOI: 10.3389/fimmu.2024.1328306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 03/13/2024] [Indexed: 04/10/2024] Open
Abstract
CD39 is the major enzyme controlling the levels of extracellular adenosine triphosphate (ATP) via the stepwise hydrolysis of ATP to adenosine diphosphate (ADP) and adenosine monophosphate (AMP). As extracellular ATP is a strong promoter of inflammation, monoclonal antibodies (mAbs) blocking CD39 are utilized therapeutically in the field of immune-oncology. Though anti-CD39 mAbs are highly specific for their target, they lack deep penetration into the dense tissue of solid tumors, due to their large size. To overcome this limitation, we generated and characterized nanobodies that targeted and blocked human CD39. From cDNA-immunized alpacas we selected 16 clones from seven nanobody families that bind to two distinct epitopes of human CD39. Among these, clone SB24 inhibited the enzymatic activity of CD39. Of note, SB24 blocked ATP degradation by both soluble and cell surface CD39 as a 15kD monomeric nanobody. Dimerization via fusion to an immunoglobulin Fc portion further increased the blocking potency of SB24 on CD39-transfected HEK cells. Finally, we confirmed the CD39 blocking properties of SB24 on human PBMCs. In summary, SB24 provides a new small biological antagonist of human CD39 with potential application in cancer therapy.
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Affiliation(s)
- Stephan Menzel
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg- Eppendorf, Hamburg, Germany
- Core Facility Nanobodies, University of Bonn, Bonn, Germany
| | - Yinghui Duan
- Department of Neurology, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Julia Hambach
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Birte Albrecht
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Dorte Wendt-Cousin
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Riekje Winzer
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Eva Tolosa
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anne Rissiek
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Cytometry und Cell Sorting Core Unit, Dept. of Stem Cell Transplantation, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Andreas H. Guse
- Department of Biochemistry and Molecular Cell Biology, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Friedrich Haag
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tim Magnus
- Department of Neurology, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Friedrich Koch-Nolte
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Björn Rissiek
- Department of Neurology, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
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4
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Winzer R, Nguyen DH, Schoppmeier F, Cortesi F, Gagliani N, Tolosa E. Purinergic enzymes on extracellular vesicles: immune modulation on the go. Front Immunol 2024; 15:1362996. [PMID: 38426088 PMCID: PMC10902224 DOI: 10.3389/fimmu.2024.1362996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 01/30/2024] [Indexed: 03/02/2024] Open
Abstract
An increase in the extracellular concentration of ATP as a consequence of cellular stress or cell death results in the activation of immune cells. To prevent inflammation, extracellular ATP is rapidly metabolized to adenosine, which deploys an anti-inflammatory signaling cascade upon binding to P1 receptors on immune cells. The ectonucleotidases necessary for the degradation of ATP and generation of adenosine are present on the cell membrane of many immune cells, and their expression is tightly regulated under conditions of inflammation. The discovery that extracellular vesicles (EVs) carry purinergic enzyme activity has brought forward the concept of EVs as a new player in immune regulation. Adenosine-generating EVs derived from cancer cells suppress the anti-tumor response, while EVs derived from immune or mesenchymal stem cells contribute to the restoration of homeostasis after infection. Here we will review the existing knowledge on EVs containing purinergic enzymes and molecules, and discuss the relevance of these EVs in immune modulation and their potential for therapy.
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Affiliation(s)
- Riekje Winzer
- Department of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Du Hanh Nguyen
- Department of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Felix Schoppmeier
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Filippo Cortesi
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nicola Gagliani
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Eva Tolosa
- Department of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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5
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Bansal S, Rahman M, Ravichandran R, Canez J, Fleming T, Mohanakumar T. Extracellular Vesicles in Transplantation: Friend or Foe. Transplantation 2024; 108:374-385. [PMID: 37482627 DOI: 10.1097/tp.0000000000004693] [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] [Indexed: 07/25/2023]
Abstract
The long-term function of transplanted organs, even under immunosuppression, is hindered by rejection, especially chronic rejection. Chronic rejection occurs more frequently after lung transplantation, termed chronic lung allograft dysfunction (CLAD), than after transplantation of other solid organs. Pulmonary infection is a known risk factor for CLAD, as transplanted lungs are constantly exposed to the external environment; however, the mechanisms by which respiratory infections lead to CLAD are poorly understood. The role of extracellular vesicles (EVs) in transplantation remains largely unknown. Current evidence suggests that EVs released from transplanted organs can serve as friend and foe. EVs carry not only major histocompatibility complex antigens but also tissue-restricted self-antigens and various transcription factors, costimulatory molecules, and microRNAs capable of regulating alloimmune responses. EVs play an important role in antigen presentation by direct, indirect, and semidirect pathways in which CD8 and CD4 cells can be activated. During viral infections, exosomes (small EVs <200 nm in diameter) can express viral antigens and regulate immune responses. Circulating exosomes may also be a viable biomarker for other diseases and rejection after organ transplantation. Bioengineering the surface of exosomes has been proposed as a tool for targeted delivery of drugs and personalized medicine. This review focuses on recent studies demonstrating the role of EVs with a focus on exosomes and their dual role (immune activation or tolerance induction) after organ transplantation, more specifically, lung transplantation.
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Affiliation(s)
- Sandhya Bansal
- Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ
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6
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Aloi N, Drago G, Ruggieri S, Cibella F, Colombo P, Longo V. Extracellular Vesicles and Immunity: At the Crossroads of Cell Communication. Int J Mol Sci 2024; 25:1205. [PMID: 38256278 PMCID: PMC10816988 DOI: 10.3390/ijms25021205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 01/24/2024] Open
Abstract
Extracellular vesicles (EVs), comprising exosomes and microvesicles, are small membranous structures secreted by nearly all cell types. They have emerged as crucial mediators in intercellular communication, playing pivotal roles in diverse physiological and pathological processes, notably within the realm of immunity. These roles go beyond mere cellular interactions, as extracellular vesicles stand as versatile and dynamic components of immune regulation, impacting both innate and adaptive immunity. Their multifaceted involvement includes immune cell activation, antigen presentation, and immunomodulation, emphasising their significance in maintaining immune homeostasis and contributing to the pathogenesis of immune-related disorders. Extracellular vesicles participate in immunomodulation by delivering a wide array of bioactive molecules, including proteins, lipids, and nucleic acids, thereby influencing gene expression in target cells. This manuscript presents a comprehensive review that encompasses in vitro and in vivo studies aimed at elucidating the mechanisms through which EVs modulate human immunity. Understanding the intricate interplay between extracellular vesicles and immunity is imperative for unveiling novel therapeutic targets and diagnostic tools applicable to various immunological disorders, including autoimmune diseases, infectious diseases, and cancer. Furthermore, recognising the potential of EVs as versatile drug delivery vehicles holds significant promise for the future of immunotherapies.
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Affiliation(s)
| | | | | | | | - Paolo Colombo
- Institute for Biomedical Research and Innovation, National Research Council of Italy (IRIB-CNR), Via Ugo La Malfa 153, 90146 Palermo, Italy; (N.A.); (G.D.); (S.R.); (F.C.); (V.L.)
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7
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Gu Q, Tung KS, Lorenz UM. Treg-specific deletion of the phosphatase SHP-1 impairs control of inflammation in vivo. Front Immunol 2023; 14:1139326. [PMID: 37006301 PMCID: PMC10060847 DOI: 10.3389/fimmu.2023.1139326] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 02/28/2023] [Indexed: 03/18/2023] Open
Abstract
IntroductionTo achieve a healthy and functional immune system, a delicate balance exists between the activation of conventional T cells (Tcon cells) and the suppression by regulatory T cells (Treg). The tyrosine phosphatase SHP-1, a negative regulator of TCR signaling, shapes this ‘activation-suppression’ balance by modulating Tcon cell resistance to Treg-mediated suppression. Treg cells also express SHP-1, but its role in influencing Treg function is still not fully understood. MethodsWe generated a Treg-specific SHP-1 deletion model, Foxp3Cre+ Shp-1f/f, to address how SHP-1 affects Treg function and thereby contributes to T cell homeostasis using a combination of ex vivo studies and in vivo models of inflammation and autoimmunity.ResultsWe show that SHP-1 modulates Treg suppressive function at different levels. First, at the intracellular signaling level in Treg cells, SHP-1 attenuates TCR-dependent Akt phosphorylation, with loss of SHP-1 driving Treg cells towards a glycolysis pathway. At the functional level, SHP-1 expression limits the in vivo accumulation of CD44hiCD62Llo T cells within the steady state Tcon populations (both CD8+ as well as CD4+ Tcon). Further, SHP-1-deficient Treg cells are less efficient in suppressing inflammation in vivo; mechanistically, this appears to be due to a failure to survive or a defect in migration of SHP-1-deficient Treg cells to peripheral inflammation sites.ConclusionOur data identify SHP-1 as an important intracellular mediator for fine-tuning the balance between Treg-mediated suppression and Tcon activation/resistance.
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Affiliation(s)
- QinLei Gu
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, United States
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA, United States
| | - Kenneth S. Tung
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA, United States
- Department of Pathology, University of Virginia, Charlottesville, VA, United States
| | - Ulrike M. Lorenz
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, United States
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA, United States
- Department of Pathology and Immunology, Washington University in St. Louis, Saint Louis, MO, United States
- *Correspondence: Ulrike M. Lorenz,
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8
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Spiers HVM, Stadler LKJ, Smith H, Kosmoliaptsis V. Extracellular Vesicles as Drug Delivery Systems in Organ Transplantation: The Next Frontier. Pharmaceutics 2023; 15:891. [PMID: 36986753 PMCID: PMC10052210 DOI: 10.3390/pharmaceutics15030891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 03/12/2023] Open
Abstract
Extracellular vesicles are lipid bilayer-delimited nanoparticles excreted into the extracellular space by all cells. They carry a cargo rich in proteins, lipids and DNA, as well as a full complement of RNA species, which they deliver to recipient cells to induce downstream signalling, and they play a key role in many physiological and pathological processes. There is evidence that native and hybrid EVs may be used as effective drug delivery systems, with their intrinsic ability to protect and deliver a functional cargo by utilising endogenous cellular mechanisms making them attractive as therapeutics. Organ transplantation is the gold standard for treatment for suitable patients with end-stage organ failure. However, significant challenges still remain in organ transplantation; prevention of graft rejection requires heavy immunosuppression and the lack of donor organs results in a failure to meet demand, as manifested by growing waiting lists. Pre-clinical studies have demonstrated the ability of EVs to prevent rejection in transplantation and mitigate ischemia reperfusion injury in several disease models. The findings of this work have made clinical translation of EVs possible, with several clinical trials actively recruiting patients. However, there is much to be uncovered, and it is essential to understand the mechanisms behind the therapeutic benefits of EVs. Machine perfusion of isolated organs provides an unparalleled platform for the investigation of EV biology and the testing of the pharmacokinetic and pharmacodynamic properties of EVs. This review classifies EVs and their biogenesis routes, and discusses the isolation and characterisation methods adopted by the international EV research community, before delving into what is known about EVs as drug delivery systems and why organ transplantation represents an ideal platform for their development as drug delivery systems.
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Affiliation(s)
- Harry V. M. Spiers
- Department of Surgery, University of Cambridge, Addenbrooke’s Hospital, Cambridge CB2 0QQ, UK; (H.V.M.S.)
- NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Lukas K. J. Stadler
- Department of Surgery, University of Cambridge, Addenbrooke’s Hospital, Cambridge CB2 0QQ, UK; (H.V.M.S.)
- NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Hugo Smith
- Department of Surgery, University of Cambridge, Addenbrooke’s Hospital, Cambridge CB2 0QQ, UK; (H.V.M.S.)
| | - Vasilis Kosmoliaptsis
- Department of Surgery, University of Cambridge, Addenbrooke’s Hospital, Cambridge CB2 0QQ, UK; (H.V.M.S.)
- NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation, University of Cambridge, Cambridge CB2 0QQ, UK
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Mahmoudi F, Hanachi P, Montaseri A. Extracellular vesicles of immune cells; immunomodulatory impacts and therapeutic potentials. Clin Immunol 2023; 248:109237. [PMID: 36669608 DOI: 10.1016/j.clim.2023.109237] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 12/08/2022] [Accepted: 12/28/2022] [Indexed: 01/19/2023]
Abstract
Extracellular vesicles (EVs) are a diverse collection of lipid bilayer-membrane-bound particles which are released from cells into the extracellular space and biologic fluids. In multicellular organisms, these vesicles facilitate the exchange of bioactive compounds such as RNA, DNA, proteins, various metabolites, and lipids between the cells. EVs are produced and released by almost all eukaryotic cells including immune cells and can have immunomodulating effects by either stimulation or suppression of their activities. This immune-modulating feature may provide a promising strategy for treating immune-mediated diseases such as cancer, neurodegenerative diseases, autoimmune disorders and graft-versus-host disease. Moreover, immune cell-derived EVs have received attention as potential biomarkers for being used as diagnostic tools and preventive strategies such as for developing vaccines. In this review, we focus on the EVs produced by different immune cell types, their effects on the immune system, and highlight their potential applications for immunotherapy.
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Affiliation(s)
- Fariba Mahmoudi
- Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
| | - Parichehr Hanachi
- Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran.
| | - Azadeh Montaseri
- Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Unit of Histology and Medical Embryology, Sapienza University of Rome, 00161 Rome, Italy
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10
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Heydari Z, Peshkova M, Gonen ZB, Coretchi I, Eken A, Yay AH, Dogan ME, Gokce N, Akalin H, Kosheleva N, Galea-Abdusa D, Ulinici M, Vorojbit V, Shpichka A, Groppa S, Vosough M, Todiras M, Butnaru D, Ozkul Y, Timashev P. EVs vs. EVs: MSCs and Tregs as a source of invisible possibilities. J Mol Med (Berl) 2023; 101:51-63. [PMID: 36527475 PMCID: PMC9759062 DOI: 10.1007/s00109-022-02276-2] [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: 06/28/2022] [Revised: 11/11/2022] [Accepted: 12/02/2022] [Indexed: 12/23/2022]
Abstract
Extracellular vesicles (EVs) are produced by various cells and exist in most biological fluids. They play an important role in cell-cell signaling, immune response, and tumor metastasis, and also have theranostic potential. They deliver many functional biomolecules, including DNA, microRNAs (miRNA), messenger RNA (mRNA), long non-coding RNA (lncRNA), lipids, and proteins, thus affecting different physiological processes in target cells. Decreased immunogenicity compared to liposomes or viral vectors and the ability to cross through physiological barriers such as the blood-brain barrier make them an attractive and innovative option as diagnostic biomarkers and therapeutic carriers. Here, we highlighted two types of cells that can produce functional EVs, namely, mesenchymal stem/stromal cells (MSCs) and regulatory T cells (Tregs), discussing MSC/Treg-derived EV-based therapies for some specific diseases including acute respiratory distress syndrome (ARDS), autoimmune diseases, and cancer.
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Affiliation(s)
- Zahra Heydari
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia
| | - Maria Peshkova
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia.,World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov University, Moscow, Russia
| | | | - Ianos Coretchi
- Department of Pharmacology and Clinical Pharmacology, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Moldova
| | - Ahmet Eken
- Betül-Ziya Eren Genome and Stem Cell Center (GENKOK), Kayseri, Turkey.,Department of Medical Biology, Erciyes University School of Medicine, Kayseri, Turkey
| | - Arzu Hanım Yay
- Betül-Ziya Eren Genome and Stem Cell Center (GENKOK), Kayseri, Turkey.,Department of Histology and Embryology, Erciyes University School of Medicine, Kayseri, Turkey
| | - Muhammet Ensar Dogan
- Department of Medical Genetic, Erciyes University School of Medicine, Kayseri, Turkey
| | - Nuriye Gokce
- Department of Medical Genetic, Erciyes University School of Medicine, Kayseri, Turkey
| | - Hilal Akalin
- Department of Medical Genetic, Erciyes University School of Medicine, Kayseri, Turkey
| | - Nastasia Kosheleva
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia.,FSBSI Institute of General Pathology and Pathophysiology, Moscow, Russia
| | - Daniela Galea-Abdusa
- Genetics Laboratory, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Moldova
| | - Mariana Ulinici
- Department of Microbiology and Immunology, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Moldova
| | - Valentina Vorojbit
- Department of Microbiology and Immunology, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Moldova
| | - Anastasia Shpichka
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia.,World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov University, Moscow, Russia.,Chemistry Department, Lomonosov Moscow State University, Moscow, Russia
| | - Stanislav Groppa
- Department of Neurology, Nicolae Testemițanu State University of Medicine and Pharmacy, Chisinau, Moldova.,Laboratory of Neurobiology and Medical Genetics, Nicolae Testemițanu State University of Medicine and Pharmacy, Chisinau, Moldova.,Department of Neurology, Institute of Emergency Medicine, Chisinau, Moldova
| | - Massoud Vosough
- Department of Regenerative Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran.
| | - Mihail Todiras
- Drug Research Center, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Moldova
| | | | - Yusuf Ozkul
- Betül-Ziya Eren Genome and Stem Cell Center (GENKOK), Kayseri, Turkey. .,Department of Medical Genetic, Erciyes University School of Medicine, Kayseri, Turkey.
| | - Peter Timashev
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia. .,World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov University, Moscow, Russia. .,Chemistry Department, Lomonosov Moscow State University, Moscow, Russia.
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11
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Asemani Y, Najafi S, Ezzatifar F, Zolbanin NM, Jafari R. Recent highlights in the immunomodulatory aspects of Treg cell-derived extracellular vesicles: special emphasis on autoimmune diseases and transplantation. Cell Biosci 2022; 12:67. [PMID: 35606869 PMCID: PMC9125934 DOI: 10.1186/s13578-022-00808-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 05/07/2022] [Indexed: 12/19/2022] Open
Abstract
In order to maintain immunological tolerance to self and non-self antigens, one’s T regulatory (Treg) cells play a critical role in the regulation of detrimental inflammation. Treg cells inhibit the immune system in a variety of ways, some of which are contact-dependent and the others are soluble factors. Extracellular vesicles (EVs) are mainly secretory membrane structures that play a pivotal role in intercellular communication in both the local and systemic environments, enabling the transport of proteins, lipids, and nucleic acids between immune and non-immune cells. A number of studies have shown that Treg-derived EVs are specially formulated intercellular exchanging devices capable of regulating immunological responses by producing a cell-free tolerogenic milieu. Some of the processes suggested include miRNA-induced gene shutdown and upmodulation, surface protein activity, and enzyme transfer. Instead of being influenced by external circumstances like Tregs, exosomes’ cohesive structure allows them to transmit their charge intact across the blood–brain barrier and deliver it to the target cell with particular receptors. These properties have resulted in the use of Treg-derived EVs' immunomodulatory effects moving beyond laboratory research and into preclinical applications in animal models of a variety of inflammatory, autoimmune, and transplant rejection disorders. However, insufficient evidence has been produced to permit enrollment in human clinical studies. As such, we begin our research by introducing the most potent immunosuppressive elements discovered in Treg-derived EVs elucidating likely mechanisms of action in inhibiting immunological responses. Following that, we address recent research on the potential of suppressive EVs to regulate autoimmune inflammatory responses and improve tissue transplant survival.
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12
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Ferrari L, Iodice S, Cantone L, Solazzo G, Dioni L, Hoxha M, Vicenzi M, Mozzoni P, Bergamaschi E, Persico N, Bollati V. Extracellular vesicles and their miRNA contents counterbalance the pro-inflammatory effect of air pollution during physiological pregnancy: A focus on Syncytin-1 positive vesicles. ENVIRONMENT INTERNATIONAL 2022; 169:107502. [PMID: 36095930 DOI: 10.1016/j.envint.2022.107502] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 08/29/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
The impact of exposure to respirable particulate matter (PM) during pregnancy is a growing concern, as several studies have associated increased risks of adverse pregnancy and birth outcomes, and impaired intrauterine growth with air pollution. The molecular mechanisms responsible for such effects are still under debate. Extracellular vesicles (EVs), which travel in body fluids and transfer microRNAs (miRNAs) between tissues (e.g., pulmonary environment and placenta), might play an important role in PM-induced risk. We sought to determine whether the levels of PM with aerodynamic diameters of ≤10 µm (PM10) and ≤2.5 µm (PM2.5) are associated with changes in plasmatic EV release and EV-miRNA content by investigating 518 women enrolled in the INSIDE study during the first trimester of pregnancy. In all models, we included both the 90-day averages of PM (long-term effects) and the differences between the daily estimate of PM and the 90-day average (short-term effects). Short-term PM10 and PM2.5 were associated with increased concentrations of all seven EV types that we assayed (positive for human antigen leukocyte G (HLA-G), Syncytin-1 (Sync-1), CD14, CD105, CD62e, CD61, or CD25 determinants), while long-term PM10 showed a trend towards decreased EV concentrations. Increased Sync-1 + EV levels were associated with the plasmatic decrease of sVCAM-1, but not of sICAM-1, which are circulating biomarkers of endothelial dysfunction. Thirteen EV-miRNAs were downregulated in response to long-term PM10 and PM2.5 variations, while seven were upregulated (p-value < 0.05, false discovery rate p-value (qFDR) < 0.1). Only one EV-miRNA (hsa-miR-221-3p) was downregulated after short-term variations. The identified PM-modulated EV-miRNAs exhibited putative roles in inflammation, gestational hypertension, and pre-eclampsia, as highlighted by miRNA target analysis. Our findings strongly support the hypothesis that EVs have an important role in modulating PM exposure effects during pregnancy, possibly through their miRNA cargo.
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Affiliation(s)
- Luca Ferrari
- EPIGET LAB, Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy; Department of Preventive Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Simona Iodice
- EPIGET LAB, Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Laura Cantone
- EPIGET LAB, Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Giulia Solazzo
- EPIGET LAB, Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Laura Dioni
- EPIGET LAB, Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Mirjam Hoxha
- EPIGET LAB, Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Marco Vicenzi
- Cardiovascular Disease Unit, Department of Internal Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Paola Mozzoni
- Department of Medicine and Surgery, Università degli Studi di Parma, Parma, Italy
| | - Enrico Bergamaschi
- Department of Public Health Sciences and Paediatrics, Università degli Studi di Torino, Torino, Italy
| | - Nicola Persico
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy; Department of Obstetrics and Gynecology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Valentina Bollati
- EPIGET LAB, Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy; Department of Preventive Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
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13
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Lin C, Guo J, Jia R. Roles of Regulatory T Cell-Derived Extracellular Vesicles in Human Diseases. Int J Mol Sci 2022; 23:ijms231911206. [PMID: 36232505 PMCID: PMC9569925 DOI: 10.3390/ijms231911206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/18/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
Regulatory T (Treg) cells play crucial roles in maintaining immune self-tolerance and immune homeostasis, and closely associated with many human diseases. Recently, Treg cells-derived extracellular vesicles (Treg-EVs) have been demonstrated as a novel cell-contact independent inhibitory mechanism of Treg cells. Treg-EVs contain many specific biological molecules, which are delivered to target cells and modulate immune responses by inhibiting T cell proliferation, inducing T cell apoptosis, and changing the cytokine expression profiles of target cells. The abnormal quantity or function of Treg-EVs is associated with several types of human diseases or conditions, such as transplant rejection, inflammatory diseases, autoimmune diseases, and cancers. Treg-EVs are promising novel potential targets for disease diagnosis, therapy, and drug transport. Moreover, Treg-EVs possess distinct advantages over Treg cell-based immunotherapies. However, the therapeutic potential of Treg-EVs is limited by some factors, such as the standardized protocol for isolation and purification, large scale production, and drug loading efficiency. In this review, we systematically describe the structure, components, functions, and basic mechanisms of action of Treg-EVs and discuss the emerging roles in pathogenesis and the potential application of Treg-EVs in human diseases.
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Affiliation(s)
- Can Lin
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Jihua Guo
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
- Department of Endodontics, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
- Correspondence: (J.G.); (R.J.); Tel.: +86-27-87686208 (J.G.); +86-27-87686268 (R.J.)
| | - Rong Jia
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
- Correspondence: (J.G.); (R.J.); Tel.: +86-27-87686208 (J.G.); +86-27-87686268 (R.J.)
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14
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Lazana I, Vassilopoulos G. A 'waste product' to save the day in the field of transplantation: the evolving potential of extracellular vesicles. Immunology 2022; 167:154-164. [PMID: 35751500 DOI: 10.1111/imm.13532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 05/25/2022] [Indexed: 11/26/2022] Open
Abstract
Graft rejection and graft-versus-host disease constitute the leading causes of morbidity and early mortality after solid organ and hematopoietic stem cell transplantation, respectively. Despite the current advances in immunotherapy, their incidence remains significant, underlying the need for new therapies to be developed. Extracellular vesicles (EV), and particularly small EV (sEV), have emerged as significant mediators of intercellular communication and immune modulation. Depending on the parental cell, they may exert potent immunostimulatory or immunosuppressive functions, attracting a major interest in field of transplantation. An increasing number of publications, studying their role in graft dysfunction pathophysiology, early detection of graft failure and in prevention and/or therapy of graft rejection, have emerged in recent years with enthusiastic results. In this review, we discuss the role and various applications of sEV in the transplant setting and present their huge potential for clinical translation. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Ioanna Lazana
- Cell and Gene Therapy Laboratory, Biomedical Research Foundation of the Academy of Athens, Athens, Greece.,Hematology Department, King's College Hospital NHS Foundation Trust, London, United Kingdom
| | - George Vassilopoulos
- Cell and Gene Therapy Laboratory, Biomedical Research Foundation of the Academy of Athens, Athens, Greece.,Division of Hematology, University of Thessaly Medical School, Larissa, Greece
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15
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Sailliet N, Ullah M, Dupuy A, Silva AKA, Gazeau F, Le Mai H, Brouard S. Extracellular Vesicles in Transplantation. Front Immunol 2022; 13:800018. [PMID: 35185891 PMCID: PMC8851566 DOI: 10.3389/fimmu.2022.800018] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 01/11/2022] [Indexed: 12/12/2022] Open
Abstract
Extracellular vesicles (EVs) have been extensively studied in the last two decades. It is now well documented that they can actively participate in the activation or regulation of immune system functions through different mechanisms, the most studied of which include protein–protein interactions and miRNA transfers. The functional diversity of EV-secreting cells makes EVs potential targets for immunotherapies through immune cell-derived EV functions. They are also a potential source of biomarkers of graft rejection through donor cells or graft environment-derived EV content modification. This review focuses on preclinical studies that describe the role of EVs from different cell types in immune suppression and graft tolerance and on the search for biomarkers of rejection.
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Affiliation(s)
- Nicolas Sailliet
- Nantes Université, INSERM, Centeer for Research in Transplantation and Translational Immunology, UMR 1064, Nantes, France
| | - Matti Ullah
- MSC-med, INSERM U7057, Universite de Paris, Paris, France
| | - Amandine Dupuy
- Nantes Université, INSERM, Centeer for Research in Transplantation and Translational Immunology, UMR 1064, Nantes, France
| | | | | | - Hoa Le Mai
- Nantes Université, INSERM, Centeer for Research in Transplantation and Translational Immunology, UMR 1064, Nantes, France
| | - Sophie Brouard
- Nantes Université, INSERM, Centeer for Research in Transplantation and Translational Immunology, UMR 1064, Nantes, France.,Labex IGO, Nantes, France
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16
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Abu N, Rus Bakarurraini NAA. The interweaving relationship between extracellular vesicles and T cells in cancer. Cancer Lett 2021; 530:1-7. [PMID: 34906625 DOI: 10.1016/j.canlet.2021.12.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/26/2021] [Accepted: 12/07/2021] [Indexed: 12/21/2022]
Abstract
The interdependency between cancer cells and immune cells is an important link in understanding cancer pathogenesis. T cells are important immune cells that are able to either impede or promote tumor growth. Extracellular vesicles or EVs are membrane-encapsulated vesicles that are released by both cancer and immune cells that can act as communicators. Studies have shown that tumor-derived EVs can interact with immune cells, particularly T cells. Vice versa, T cells-derived EVs have also been shown to possess immunomodulatory roles. Therefore, the purpose of this mini-review is to understand the role of tumor-derived EVs and T-cells derived EVs on cancer immunosuppression especially the interweaving role of different types of EVs and how it affects tumor immunity. We also discuss the role of EVs in different types of T cells namely CD8+, CD4+ Th17 and Treg cells. More importantly, we include the limitations and future directions involving this type of research. This will further elucidate our understanding of the important functions of these tiny mediators.
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Affiliation(s)
- Nadiah Abu
- UKM Medical Molecular Biology Institute (UMBI), UKM Medical Center, 56000, Kuala Lumpur, Malaysia.
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17
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Chen J, Huang F, Hou Y, Lin X, Liang R, Hu X, Zhao J, Wang J, Olsen N, Zheng SG. TGF-β-induced CD4+ FoxP3+ regulatory T cell-derived extracellular vesicles modulate Notch1 signaling through miR-449a and prevent collagen-induced arthritis in a murine model. Cell Mol Immunol 2021; 18:2516-2529. [PMID: 34556822 PMCID: PMC8545930 DOI: 10.1038/s41423-021-00764-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 08/21/2021] [Indexed: 02/08/2023] Open
Abstract
CD4+FOXP3+ Treg cells are central to the maintenance of self-tolerance and can be defective in autoimmunity. In autoimmune rheumatic diseases, dysfunctional self-tolerance, is to a large extent, caused by insufficient Treg-cell activity. Although nTregs have therapeutic effects in vivo, their relative scarcity and slow rate of in vitro expansion hinder the application of nTreg therapy. It was previously reported that EVs contribute significantly to the suppressive function of FOXP3+ Treg cells. Considering that the stability and plasticity of nTregs remain major challenges in vivo, we established EVs derived from in vitro TGF-β-induced Treg cells (iTreg-EVs) and assessed their functions in a murine model of autoimmune arthritis. The results demonstrated that iTreg-EVs preferentially homed to the pathological joint and efficiently prevented the imbalance in Th17/Treg cells in arthritic mice. Furthermore, we found that miR-449a-5p mediated Notch1 expression modulation and that miR-449a-5p knockdown abolished the effects of iTreg-EVs on effector T cells and regulatory T cells in vitro and in vivo. Taken together, our results show that iTreg-EVs control the inflammatory responses of recipient T cells through miR-449a-5p-dependent modulation of Notch1 and ameliorate the development and severity of arthritis, which may provide a potential cell-free strategy based on manipulating iTreg-EVs to prevent autoimmune arthritis.
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Affiliation(s)
- Jingrong Chen
- grid.412558.f0000 0004 1762 1794Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China ,grid.412558.f0000 0004 1762 1794Department of Internal Medicine, Division of Rheumatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China
| | - Feng Huang
- grid.412558.f0000 0004 1762 1794Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China
| | - Yuluan Hou
- grid.412558.f0000 0004 1762 1794Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China
| | - Xiaorong Lin
- grid.412558.f0000 0004 1762 1794Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China
| | - Rongzhen Liang
- grid.412558.f0000 0004 1762 1794Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China
| | - Xiaojiang Hu
- grid.412558.f0000 0004 1762 1794Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China
| | - Jun Zhao
- grid.412558.f0000 0004 1762 1794Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China
| | - Julie Wang
- grid.412558.f0000 0004 1762 1794Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China
| | - Nancy Olsen
- grid.29857.310000 0001 2097 4281Division of Rheumatology, Department of Medicine, Penn State University Hershey Medical Center, Hershey, PA USA
| | - Song Guo Zheng
- grid.412558.f0000 0004 1762 1794Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong China
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18
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Grover P, Goel PN, Greene MI. Regulatory T Cells: Regulation of Identity and Function. Front Immunol 2021; 12:750542. [PMID: 34675933 PMCID: PMC8524049 DOI: 10.3389/fimmu.2021.750542] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 09/14/2021] [Indexed: 12/22/2022] Open
Abstract
T regulatory cells suppress a variety of immune responses to self-antigens and play a role in peripheral tolerance maintenance by limiting autoimmune disorders, and other pathological immune responses such as limiting immune reactivity to oncoprotein encoded antigens. Forkhead box P3 (FOXP3) expression is required for Treg stability and affects functional activity. Mutations in the master regulator FOXP3 and related components have been linked to autoimmune diseases in humans, such as IPEX, and a scurfy-like phenotype in mice. Several lines of evidence indicate that Treg use a variety of immunosuppressive mechanisms to limit an immune response by targeting effector cells, including secretion of immunoregulatory cytokines, granzyme/perforin-mediated cell cytolysis, metabolic perturbation, directing the maturation and function of antigen-presenting cells (APC) and secretion of extracellular vesicles for the development of immunological tolerance. In this review, several regulatory mechanisms have been highlighted and discussed.
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Affiliation(s)
- Payal Grover
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Peeyush N Goel
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Mark I Greene
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
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19
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Schneider E, Winzer R, Rissiek A, Ricklefs I, Meyer-Schwesinger C, Ricklefs FL, Bauche A, Behrends J, Reimer R, Brenna S, Wasielewski H, Lauten M, Rissiek B, Puig B, Cortesi F, Magnus T, Fliegert R, Müller CE, Gagliani N, Tolosa E. CD73-mediated adenosine production by CD8 T cell-derived extracellular vesicles constitutes an intrinsic mechanism of immune suppression. Nat Commun 2021; 12:5911. [PMID: 34625545 PMCID: PMC8501027 DOI: 10.1038/s41467-021-26134-w] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 09/17/2021] [Indexed: 12/15/2022] Open
Abstract
Immune cells at sites of inflammation are continuously activated by local antigens and cytokines, and regulatory mechanisms must be enacted to control inflammation. The stepwise hydrolysis of extracellular ATP by ectonucleotidases CD39 and CD73 generates adenosine, a potent immune suppressor. Here we report that human effector CD8 T cells contribute to adenosine production by releasing CD73-containing extracellular vesicles upon activation. These extracellular vesicles have AMPase activity, and the resulting adenosine mediates immune suppression independently of regulatory T cells. In addition, we show that extracellular vesicles isolated from the synovial fluid of patients with juvenile idiopathic arthritis contribute to T cell suppression in a CD73-dependent manner. Our results suggest that the generation of adenosine upon T cell activation is an intrinsic mechanism of human effector T cells that complements regulatory T cell-mediated suppression in the inflamed tissue. Finally, our data underscore the role of immune cell-derived extracellular vesicles in the control of immune responses.
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Affiliation(s)
- Enja Schneider
- Department of Immunology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Riekje Winzer
- Department of Immunology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.
| | - Anne Rissiek
- Department of Immunology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Isabell Ricklefs
- Division of Pediatric Pneumology & Allergology, University Medical Center Schleswig-Holstein, 23538, Lübeck, Germany.,Airway Research Center North, Member of the German Center for Lung Research, Lübeck, Germany
| | - Catherine Meyer-Schwesinger
- Department of Cellular and Integrative Physiology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Franz L Ricklefs
- Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Andreas Bauche
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Jochen Behrends
- Core Facility Fluorescence Cytometry, Research Center Borstel, 23845, Borstel, Germany
| | - Rudolph Reimer
- Technology Platform Microscopy and Image Analysis, Heinrich Pette Institute/Leibniz Institute for Experimental Virology, 20251, Hamburg, Germany
| | - Santra Brenna
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Hauke Wasielewski
- Department of Immunology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Melchior Lauten
- Department of Pediatrics and Adolescent Medicine, University of Lübeck, 23538, Lübeck, Germany
| | - Björn Rissiek
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Berta Puig
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Filippo Cortesi
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.,Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Tim Magnus
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Ralf Fliegert
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Christa E Müller
- Department of Pharmaceutical & Medicinal Chemistry, University of Bonn, 53121, Bonn, Germany
| | - Nicola Gagliani
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.,Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.,Immunology and Allergy Unit, Department of Medicine, Solna, Karolinska Institute and University Hospital, Stockholm, Sweden
| | - Eva Tolosa
- Department of Immunology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.
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20
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Hou PP, Chen HZ. Extracellular vesicles in the tumor immune microenvironment. Cancer Lett 2021; 516:48-56. [PMID: 34082025 DOI: 10.1016/j.canlet.2021.05.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/23/2021] [Accepted: 05/25/2021] [Indexed: 12/11/2022]
Abstract
Extracellular vesicles (EVs) have gained significant attention in recent decades as major mediators of intercellular communication that are involved in various essential physiological and pathological processes. They are secreted by almost all cell types and carry bioactive materials, such as proteins, lipids and nucleic acids, that can be transmitted from host cells to recipient cells, thereby eliciting phenotypic and functional alterations in the recipient cells. Recent evidence shows that EVs play essential roles in remodeling the tumor immune microenvironment (TIME). EVs derived from tumor cells and immune cells mediate mutual communication at proximal and distal sites, which determines tumor fate and antitumor therapeutic effectiveness. In this review, the current understanding of EVs and their roles in remodeling the TIME and modulating tumor-specific immunity are summarized. We mainly discuss the mutual regulation between tumor cells and tumor-infiltrating immune cells through the delivery of EVs in the TIME. We also describe the limitations of current studies and discuss directions for further research.
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Affiliation(s)
- Pei-Pei Hou
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, 361102, China
| | - Hang-Zi Chen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, 361102, China.
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21
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Extracellular vesicles in immunomodulation and tumor progression. Nat Immunol 2021; 22:560-570. [PMID: 33753940 PMCID: PMC9389600 DOI: 10.1038/s41590-021-00899-0] [Citation(s) in RCA: 227] [Impact Index Per Article: 75.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 02/03/2021] [Indexed: 01/31/2023]
Abstract
Extracellular vesicles have emerged as prominent regulators of the immune response during tumor progression. EVs contain a diverse repertoire of molecular cargo that plays a critical role in immunomodulation. Here, we identify the role of EVs as mediators of communication between cancer and immune cells. This expanded role of EVs may shed light on the mechanisms behind tumor progression and provide translational diagnostic and prognostic tools for immunologists.
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22
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Stem Cells-Derived Extracellular Vesicles: Potential Therapeutics for Wound Healing in Chronic Inflammatory Skin Diseases. Int J Mol Sci 2021; 22:ijms22063130. [PMID: 33808520 PMCID: PMC8003197 DOI: 10.3390/ijms22063130] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/08/2021] [Accepted: 03/16/2021] [Indexed: 12/29/2022] Open
Abstract
Endosome-derived small extracellular vesicles (EVs), often referred to as exosomes, are produced by almost all, if not all, cell types, and are critical for intercellular communication. They are composed of a lipid bilayer associated with membrane proteins and contain a payload of lipids, proteins and regulatory RNAs that depends on the parental cell physiological condition. By transferring their “cargo”, exosomes can modulate the phenotype of neighboring and distant cells. Stem cells (SC) were widely studied for therapeutic applications regarding their regenerative/reparative potential as well as their immunomodulatory properties. Whether from autologous or allogeneic source, SC beneficial effects in terms of repair and regeneration are largely attributed to their paracrine signaling notably through secreted EVs. Subsequently, SC-derived EVs have been investigated for the treatment of various diseases, including inflammatory skin disorders, and are today fast-track cell-free tools for regenerative/reparative strategies. Yet, their clinical application is still facing considerable challenges, including production and isolation procedures, and optimal cell source. Within the emerging concept of “allogeneic-driven benefit” for SC-based therapies, the use of EVs from allogeneic sources becomes the pragmatic choice although a universal allogeneic cell source is still needed. As a unique temporary organ that ensures the mutual coexistence of two allogeneic organisms, mother and fetus, the human placenta offers a persuasive allogeneic stem cell source for development of therapeutic EVs. Advancing cell-free therapeutics nurtures great hope and provides new perspectives for the development of safe and effective treatment in regenerative/reparative medicine and beyond. We will outline the current state of the art in regard of EVs, summarize their therapeutic potential in the context of skin inflammatory disorders, and discuss their translational advantages and hurdles.
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Srivastava A, Rathore S, Munshi A, Ramesh R. Extracellular Vesicles in Oncology: from Immune Suppression to Immunotherapy. AAPS J 2021; 23:30. [PMID: 33586060 PMCID: PMC7882565 DOI: 10.1208/s12248-021-00554-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 01/05/2021] [Indexed: 02/07/2023] Open
Abstract
Exosomes are involved in cell-to-cell communication and play a crucial role in cellular physiology. The role of exosomes in cancer has been widely explored. Tumor cells have evolved and adapted to evade the immune response. The study of the immune system's modulations in favor of rogue tumor cells led to the development of a novel immunotherapeutic strategy targeting the immune checkpoint proteins (ICPs). In clinical settings, the response to ICP therapy has been inconsistent and is difficult to predict. Quantitating the targeted ICPs through immunohistochemistry is one approach, but is not pragmatic in a clinical setting and is often not sensitive. Examining the molecules present in bodily fluids to determine ICP treatment response, "liquid biopsy" is a convenient alternative. The term "liquid biopsy" refers to circulating tumor cells (CTCs), extracellular vesicles (EVs), non-coding (nc) RNA, circulating tumor DNA (ctDNA), circulating free DNA (cfDNA), etc. EVs includes exosomes, microvesicles, and oncosomes. Herein, we focus on exosomes isolated from bodily fluids and their use in liquid biopsy. Due to their unique ability to transfer bioactive molecules and perturb the physiology of recipient cells, exosomes have garnered attention for their immune modulation role and as a resource to identify molecules associated with liquid biopsy-based diagnostic methods. In this review, we examine the putative role of exosomes and their cargo in influencing the immune system. We discuss the immune and tumor cells present in the tumor microenvironment (TME), and the exosomes derived from these cells to understand how they participate in creating the immune-suppressive TME. Additionally, use of exosomes in liquid biopsy-based methods to measure the treatment response elicited by immunotherapy is discussed. Finally, we describe how exosomes have been used to develop immune therapies, especially cell-free vaccines, for cancer treatment.
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Affiliation(s)
- Akhil Srivastava
- Department of Pathology, University of Oklahoma Health Sciences Center, 975 N.E., 10th Street, Oklahoma City, Oklahoma, 73104, USA
- Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, 73104, Oklahoma, USA
| | - Shipra Rathore
- Department of Pathology, University of Oklahoma Health Sciences Center, 975 N.E., 10th Street, Oklahoma City, Oklahoma, 73104, USA
- Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, 73104, Oklahoma, USA
| | - Anupama Munshi
- Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, 73104, Oklahoma, USA
- Department of Radiation Oncology, University of Oklahoma Health Sciences Center, 975 N.E., 10th Street, Oklahoma City, 73104, Oklahoma, USA
| | - Rajagopal Ramesh
- Department of Pathology, University of Oklahoma Health Sciences Center, 975 N.E., 10th Street, Oklahoma City, Oklahoma, 73104, USA.
- Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, 73104, Oklahoma, USA.
- Graduate Program in Biomedical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, 73104, Oklahoma, USA.
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24
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Favaro RR, Murrieta-Coxca JM, Gutiérrez-Samudio RN, Morales-Prieto DM, Markert UR. Immunomodulatory properties of extracellular vesicles in the dialogue between placental and immune cells. Am J Reprod Immunol 2020; 85:e13383. [PMID: 33251688 DOI: 10.1111/aji.13383] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 11/18/2020] [Indexed: 12/16/2022] Open
Abstract
Extracellular vesicle (EV)-mediated communication has been implicated in the cooperative alliance between trophoblast and immune cells toward maternal tolerance and placentation. Syncytiotrophoblast cells secrete EVs directly into the maternal circulation, which are taken up by immune cells, endothelial cells, and other cell types. Initial evidence also shows that EVs produced by immune cells are, in turn, incorporated by trophoblast cells and modulate placental responses. Non-coding RNAs (ncRNAs), proteins, and lipid mediators transported in EVs are able to influence proliferation, differentiation, cytokine production, and immunological responses of recipient cells. The molecular alphabet and cellular targets involved in this dialogue are being revealed. Nevertheless, several questions regarding the whole content, surface markers, and biological functions of EVs still remain to be investigated in both physiological and pathological conditions. Analysis of circulating EVs in maternal blood has the potential to serve as a minimally invasive approach to monitoring placental functions and immunological features of pregnancy, aiding in the diagnostics of complications. This review addresses the immunomodulatory properties of EVs and their tasks in the communication between placental and immune cells.
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Affiliation(s)
- Rodolfo R Favaro
- Placenta Lab, Department of Obstetrics, Jena University Hospital, Jena, Germany
| | - Jose Martín Murrieta-Coxca
- Placenta Lab, Department of Obstetrics, Jena University Hospital, Jena, Germany.,RNA Bioinformatics, High Throughput Analysis, Faculty of Mathematics and Computer Science, Friedrich-Schiller-University Jena, Jena, Germany
| | | | | | - Udo R Markert
- Placenta Lab, Department of Obstetrics, Jena University Hospital, Jena, Germany
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25
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Extracellular Vesicles Orchestrate Immune and Tumor Interaction Networks. Cancers (Basel) 2020; 12:cancers12123696. [PMID: 33317058 PMCID: PMC7763968 DOI: 10.3390/cancers12123696] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 12/29/2022] Open
Abstract
Simple Summary Significant strides have been made to describe the pervasive role of extracellular vesicles (EVs) in health and disease. This work provides an insightful and unifying mechanistic understanding of EVs in immunity and tumorigenesis. This is achieved by dissecting the role of EVs within the continuum of immune cell physiology, immune–infection responses, and the immune–tumor microenvironment. Our work synthesizes important topical findings on immune EV signaling in mediating immune–tumor interaction networks. Abstract Extracellular vesicles (EVs) are emerging as potent and intricate intercellular communication networks. From their first discovery almost forty years ago, several studies have bolstered our understanding of these nano-vesicular structures. EV subpopulations are now characterized by differences in size, surface markers, cargo, and biological effects. Studies have highlighted the importance of EVs in biology and intercellular communication, particularly during immune and tumor interactions. These responses can be equally mediated at the proteomic and epigenomic levels through surface markers or nucleic acid cargo signaling, respectively. Following the exponential growth of EV studies in recent years, we herein synthesize new aspects of the emerging immune–tumor EV-based intercellular communications. We also discuss the potential role of EVs in fundamental immunological processes under physiological conditions, viral infections, and tumorigenic conditions. Finally, we provide insights on the future prospects of immune–tumor EVs and suggest potential avenues for the use of EVs in diagnostics and therapeutics.
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26
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Mastoridis S, Martinez-Llordella M, Sanchez-Fueyo A. Extracellular vesicles as mediators of alloimmunity and their therapeutic potential in liver transplantation. World J Transplant 2020; 10:330-344. [PMID: 33312894 PMCID: PMC7708876 DOI: 10.5500/wjt.v10.i11.330] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/06/2020] [Accepted: 11/17/2020] [Indexed: 02/05/2023] Open
Abstract
Extracellular vesicles (EVs) are a heterogenous group of nanosized, membrane-bound particles which are released by most cell types. They are known to play an essential role in cellular communication by way of their varied cargo which includes selectively enriched proteins, lipids, and nucleic acids. In the last two decades, wide-ranging evidence has established the involvement of EVs in the regulation of immunity, with EVs released by immune and non-immune cells shown to be capable of mediating immune stimulation or suppression and to drive inflammatory, autoimmune, and infectious disease pathology. More recently, studies have demonstrated the involvement of allograft-derived EVs in alloimmune responses following transplantation, with EVs shown to be capable of eliciting allograft rejection as well as promoting tolerance. These insights are necessitating the reassessment of standard paradigms of T cell alloimmunity. In this article, we explore the latest understanding of the impact of EVs on alloresponses following transplantation and we highlight the recent technological advances which have enabled the study of EVs in clinical transplantation. Furthermore, we discuss the rapid progress afoot in the development of EVs as novel therapeutic vehicles in clinical transplantation with particular focus on liver transplantation.
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Affiliation(s)
- Sotiris Mastoridis
- Department ofSurgery, Oxford University Hospitals, Oxford OX37LE, United Kingdom
| | - Marc Martinez-Llordella
- Institute of Liver Studies, King's College Hospital, Medical Research Council (MRC) Centre for Transplantation, London SE59NU, United Kingdom
| | - Alberto Sanchez-Fueyo
- Department of Liver Sciences, King's College Hospital, Medical Research Council (MRC) Centre for Transplantation, London SE59NU, United Kingdom
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27
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Galgani M, Bruzzaniti S, La Rocca C, Micillo T, de Candia P, Bifulco M, Matarese G. Immunometabolism of regulatory T cells in cancer. Mol Aspects Med 2020; 77:100936. [PMID: 33250195 DOI: 10.1016/j.mam.2020.100936] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/19/2020] [Accepted: 11/19/2020] [Indexed: 02/08/2023]
Abstract
Regulatory T (Treg) cells are known to orchestrate the regulatory mechanisms aimed at suppressing pathological auto-reactive immune responses and are thus key in ensuring the maintenance of immune homeostasis. On the other hand, the presence of Treg cells with enhanced suppressive capability in a plethora of human cancers represents a major obstacle to an effective anti-cancer immune response. A relevant research effort has thus been dedicated to comprehend Treg cell biology, leading to a continuously refining characterization of their phenotype and function and unveiling the central role of metabolism in ensuring Treg cell fitness in cancer. Here we focus on how the peculiar biochemical characteristics of the tumor microenvironment actually support Treg cell metabolic activation and favor their selective survival and proliferation. Moreover, we examine the key metabolic pathways that may become useful targets of novel treatments directed at hampering tumor resident Treg cell proficiency, thus representing the next research frontier in cancer immunotherapy.
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Affiliation(s)
- Mario Galgani
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131, Napoli, Italy; Laboratorio di Immunologia, Istituto per l'Endocrinologia e l'Oncologia Sperimentale, Consiglio Nazionale Delle Ricerche (IEOS-CNR), 80131, Napoli, Italy
| | - Sara Bruzzaniti
- Laboratorio di Immunologia, Istituto per l'Endocrinologia e l'Oncologia Sperimentale, Consiglio Nazionale Delle Ricerche (IEOS-CNR), 80131, Napoli, Italy; Dipartimento di Biologia, Università Degli Studi di Napoli "Federico II", 80126, Napoli, Italy
| | - Claudia La Rocca
- Laboratorio di Immunologia, Istituto per l'Endocrinologia e l'Oncologia Sperimentale, Consiglio Nazionale Delle Ricerche (IEOS-CNR), 80131, Napoli, Italy
| | - Teresa Micillo
- Unità di Neuroimmunologia, Fondazione Santa Lucia IRCCS, 00179, Roma, Italy
| | | | - Maurizio Bifulco
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131, Napoli, Italy
| | - Giuseppe Matarese
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131, Napoli, Italy; Laboratorio di Immunologia, Istituto per l'Endocrinologia e l'Oncologia Sperimentale, Consiglio Nazionale Delle Ricerche (IEOS-CNR), 80131, Napoli, Italy.
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28
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Terry LV, Oo YH. The Next Frontier of Regulatory T Cells: Promising Immunotherapy for Autoimmune Diseases and Organ Transplantations. Front Immunol 2020; 11:565518. [PMID: 33072105 PMCID: PMC7538686 DOI: 10.3389/fimmu.2020.565518] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 08/17/2020] [Indexed: 12/18/2022] Open
Abstract
Regulatory T cells (Tregs) are crucial in maintaining tolerance. Hence, Treg immunotherapy is an attractive therapeutic option in autoimmune diseases and organ transplantations. Currently, autoimmune diseases do not have a curative treatment and transplant recipients require life-long immunosuppression to prevent graft rejection. There has been significant progress in understanding polyclonal and antigen-specific Treg biology over the last decade. Clinical trials with good manufacturing practice (GMP) Treg cells have demonstrated safety and early efficacy of Treg therapy. GMP Treg cells can also be tracked following infusion. In order to improve efficacy of Tregs immunotherapy, it is necessary that Tregs migrate, survive and function at the specific target tissue. Application of antigen specific Tregs and maintaining cells' suppressive function and survival with low dose interleukin-2 (IL-2) will enhance the efficacy and longevity of infused GMP-grade Tregs. Notably, stability of Tregs in the local tissue can be manipulated by understanding the microenvironment. With the recent advances in GMP-grade Tregs isolation and antigen-specific chimeric antigen receptor (CAR)-Tregs development will allow functionally superior cells to migrate to the target organ. Thus, Tregs immunotherapy may be a promising option for patients with autoimmune diseases and organ transplantations in near future.
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Affiliation(s)
- Lauren V Terry
- Centre for Liver and Gastrointestinal Research, National Institute for Health Research Birmingham Biomedical Research Council, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Ye Htun Oo
- Centre for Liver and Gastrointestinal Research, National Institute for Health Research Birmingham Biomedical Research Council, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom.,European Reference Network (ERN) Centre-Rare Liver, Queen Elizabeth Hospital, Birmingham, United Kingdom.,Liver Transplant Unit, University Hospital of Birmingham National Health Service Foundation Trust, Birmingham, United Kingdom
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