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Juillard S, Karakeussian-Rimbaud A, Normand MH, Turgeon J, Veilleux-Trinh C, C Robitaille A, Rauch J, Chruscinski A, Grandvaux N, Boilard É, Hébert MJ, Dieudé M. Vascular injury derived apoptotic exosome-like vesicles trigger autoimmunity. J Transl Autoimmun 2024; 9:100250. [PMID: 39286649 PMCID: PMC11402544 DOI: 10.1016/j.jtauto.2024.100250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 07/15/2024] [Accepted: 08/09/2024] [Indexed: 09/19/2024] Open
Abstract
According to a central tenet of classical immune theory, a healthy immune system must avoid self-reactive lymphocyte clones but we now know that B cells repertoire exhibit some level of autoreactivity. These autoreactive B cells are thought to rely on self-ligands for their clonal selection and survival. Here, we confirm that healthy mice exhibit self-reactive B cell clones that can be stimulated in vitro by agonists of toll-like receptor (TLR) 1/2, TLR4, TLR7 and TLR9 to secrete anti-LG3/perlecan. LG3/perlecan is an antigen packaged in exosome-like structures released by apoptotic endothelial cells (ApoExos) upon vascular injury. We demonstrate that the injection of ApoExos in healthy animals activates the IL-23/IL-17 pro-inflammatory and autoimmune axis, and produces several autoantibodies, including anti-LG3 autoantibodies and hallmark autoantibodies found in systemic lupus erythematosus. We also identify γδT cells as key mediators of the maturation of ApoExos-induced autoantibodies in healthy mice. Altogether we show that ApoExos released by apoptotic endothelial cells display immune-mediating functions that can stimulate the B cells in the normal repertoire to produce autoantibodies. Our work also identifies TLR activation and γδT cells as important modulators of the humoral autoimmune response induced by ApoExos.
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Affiliation(s)
- Sandrine Juillard
- Centre de Recherche Du Centre Hospitalier de l'Université de Montréal (CRCHUM), Tour Viger, R12.218, 900 Rue St-Denis, Montréal, QC, H2X 0A9, Canada
- Université de Montréal, 2900 Bd Édouard-Montpetit, Montréal, QC, H3T 1J4, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), University of Alberta, Edmonton, AB, T6G 2E1, Canada
| | - Annie Karakeussian-Rimbaud
- Centre de Recherche Du Centre Hospitalier de l'Université de Montréal (CRCHUM), Tour Viger, R12.218, 900 Rue St-Denis, Montréal, QC, H2X 0A9, Canada
| | - Marie-Hélène Normand
- Centre de Recherche Du Centre Hospitalier de l'Université de Montréal (CRCHUM), Tour Viger, R12.218, 900 Rue St-Denis, Montréal, QC, H2X 0A9, Canada
- Université de Montréal, 2900 Bd Édouard-Montpetit, Montréal, QC, H3T 1J4, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), University of Alberta, Edmonton, AB, T6G 2E1, Canada
| | - Julie Turgeon
- Centre de Recherche Du Centre Hospitalier de l'Université de Montréal (CRCHUM), Tour Viger, R12.218, 900 Rue St-Denis, Montréal, QC, H2X 0A9, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), University of Alberta, Edmonton, AB, T6G 2E1, Canada
| | - Charlotte Veilleux-Trinh
- Centre de Recherche Du Centre Hospitalier de l'Université de Montréal (CRCHUM), Tour Viger, R12.218, 900 Rue St-Denis, Montréal, QC, H2X 0A9, Canada
| | - Alexa C Robitaille
- Centre de Recherche Du Centre Hospitalier de l'Université de Montréal (CRCHUM), Tour Viger, R12.218, 900 Rue St-Denis, Montréal, QC, H2X 0A9, Canada
- Université de Montréal, 2900 Bd Édouard-Montpetit, Montréal, QC, H3T 1J4, Canada
| | - Joyce Rauch
- Division of Rheumatology, Research Institute of the McGill University Health Centre (RI MUHC), 1001 Bd Décarie, Montréal, QC, H4A 3J1, Canada
| | | | - Nathalie Grandvaux
- Centre de Recherche Du Centre Hospitalier de l'Université de Montréal (CRCHUM), Tour Viger, R12.218, 900 Rue St-Denis, Montréal, QC, H2X 0A9, Canada
- Université de Montréal, 2900 Bd Édouard-Montpetit, Montréal, QC, H3T 1J4, Canada
| | - Éric Boilard
- Centre de Recherche Du CHU de Québec, Université Laval, 2705 Bd Laurier, Québec, QC, G1V 4G2, Canada
| | - Marie-Josée Hébert
- Centre de Recherche Du Centre Hospitalier de l'Université de Montréal (CRCHUM), Tour Viger, R12.218, 900 Rue St-Denis, Montréal, QC, H2X 0A9, Canada
- Université de Montréal, 2900 Bd Édouard-Montpetit, Montréal, QC, H3T 1J4, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), University of Alberta, Edmonton, AB, T6G 2E1, Canada
| | - Mélanie Dieudé
- Centre de Recherche Du Centre Hospitalier de l'Université de Montréal (CRCHUM), Tour Viger, R12.218, 900 Rue St-Denis, Montréal, QC, H2X 0A9, Canada
- Université de Montréal, 2900 Bd Édouard-Montpetit, Montréal, QC, H3T 1J4, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), University of Alberta, Edmonton, AB, T6G 2E1, Canada
- Medical Affairs and Innovation, Héma-Québec, 1070 Avenue des Sciences-de-la-Vie, Québec, QC, G1V 5C3, Canada
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Zhao L, Jin S, Wang S, Zhang Z, Wang X, Chen Z, Wang X, Huang S, Zhang D, Wu H. Tertiary lymphoid structures in diseases: immune mechanisms and therapeutic advances. Signal Transduct Target Ther 2024; 9:225. [PMID: 39198425 PMCID: PMC11358547 DOI: 10.1038/s41392-024-01947-5] [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: 04/01/2024] [Revised: 07/02/2024] [Accepted: 08/01/2024] [Indexed: 09/01/2024] Open
Abstract
Tertiary lymphoid structures (TLSs) are defined as lymphoid aggregates formed in non-hematopoietic organs under pathological conditions. Similar to secondary lymphoid organs (SLOs), the formation of TLSs relies on the interaction between lymphoid tissue inducer (LTi) cells and lymphoid tissue organizer (LTo) cells, involving multiple cytokines. Heterogeneity is a distinguishing feature of TLSs, which may lead to differences in their functions. Growing evidence suggests that TLSs are associated with various diseases, such as cancers, autoimmune diseases, transplant rejection, chronic inflammation, infection, and even ageing. However, the detailed mechanisms behind these clinical associations are not yet fully understood. The mechanisms by which TLS maturation and localization affect immune function are also unclear. Therefore, it is necessary to enhance the understanding of TLS development and function at the cellular and molecular level, which may allow us to utilize them to improve the immune microenvironment. In this review, we delve into the composition, formation mechanism, associations with diseases, and potential therapeutic applications of TLSs. Furthermore, we discuss the therapeutic implications of TLSs, such as their role as markers of therapeutic response and prognosis. Finally, we summarize various methods for detecting and targeting TLSs. Overall, we provide a comprehensive understanding of TLSs and aim to develop more effective therapeutic strategies.
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Affiliation(s)
- Lianyu Zhao
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- School of Stomatology, Shandong First Medical University, Jinan, China
| | - Song Jin
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- School of Stomatology, Shandong First Medical University, Jinan, China
| | - Shengyao Wang
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, Shandong, China
| | - Zhe Zhang
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, Shandong, China
| | - Xuan Wang
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- School of Stomatology, Shandong First Medical University, Jinan, China
| | - Zhanwei Chen
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- School of Stomatology, Shandong First Medical University, Jinan, China
| | - Xiaohui Wang
- School of Stomatology, Shandong First Medical University, Jinan, China
| | - Shengyun Huang
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.
- School of Stomatology, Shandong First Medical University, Jinan, China.
| | - Dongsheng Zhang
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.
- School of Stomatology, Shandong First Medical University, Jinan, China.
| | - Haiwei Wu
- Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.
- School of Stomatology, Shandong First Medical University, Jinan, China.
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Jin W, Liu H, Nie P, Li Z, Cheng X, Jiao K, Zhao G, Zheng G. Design and preparation of an artificial vascular scaffold with internal surface modification. Artif Organs 2024; 48:456-471. [PMID: 38230806 DOI: 10.1111/aor.14707] [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: 10/11/2023] [Revised: 12/13/2023] [Accepted: 12/26/2023] [Indexed: 01/18/2024]
Abstract
BACKGROUND Advances in regeneration methods have brought us improved vascular scaffolds with small diameters (φ < 6 mm) for enhancing biological suitability that solve their propensity for causing intimal hyperplasia post-transplantation. METHODS The correlation between the rehydration ratio of the hydrogel and its material concentration is obtained by adjusting the material ratio of the hydrogel solution. The vascular model with helical structure has been established and analyzed to verify the effect of helical microvascular structure on thrombosis formation by the fluid simulation methods. Then, the helical structure vascular has been fabricated by self-developed 3D bioprinter, the vascular scaffolds are freeze-dried and rehydrated in polyethylene glycol (PEG) solution. RESULTS The experimental results showed that the hybrid hydrogel had a qualified rehydration ratio when the content of gelatin, sodium alginate, and glycerol was 5, 6, and 3 wt%. The established flow channel model can effectively reduce thrombus deposition and improve long-term patency ratio. After PEG solution modification, the contact angle of the inner wall of the vascular scaffold was less than 30°, showing better hydrophilic characteristics. CONCLUSION In study, a small-diameter inner wall vascular scaffold with better long-term patency was successfully designed and prepared by wrinkling and PEG modification of the inner wall of the vascular scaffold. This study not only creates small-diameter vascular scaffolds with helical structure that improves the surface hydrophilicity to reduce the risk of thrombosis but also rekindles confidence in the regeneration of small caliber vascular structures.
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Affiliation(s)
- Wenyu Jin
- School of Mechanical Engineering, Shandong University of Technology, Zibo, China
- Shandong Provincial Key Laboratory of Precision Manufacturing and Non-Traditional Machining, Zibo, China
| | - Huanbao Liu
- School of Mechanical Engineering, Shandong University of Technology, Zibo, China
- Shandong Provincial Key Laboratory of Precision Manufacturing and Non-Traditional Machining, Zibo, China
| | - Ping Nie
- School of Mechanical Engineering, Shandong University of Technology, Zibo, China
| | - Zihan Li
- School of Mechanical Engineering, Shandong University of Technology, Zibo, China
- Shandong Provincial Key Laboratory of Precision Manufacturing and Non-Traditional Machining, Zibo, China
| | - Xiang Cheng
- School of Mechanical Engineering, Shandong University of Technology, Zibo, China
- Shandong Provincial Key Laboratory of Precision Manufacturing and Non-Traditional Machining, Zibo, China
| | - Kunpeng Jiao
- School of Mechanical Engineering, Shandong University of Technology, Zibo, China
- Shandong Provincial Key Laboratory of Precision Manufacturing and Non-Traditional Machining, Zibo, China
| | - Guangxi Zhao
- School of Mechanical Engineering, Shandong University of Technology, Zibo, China
- Shandong Provincial Key Laboratory of Precision Manufacturing and Non-Traditional Machining, Zibo, China
| | - Guangming Zheng
- School of Mechanical Engineering, Shandong University of Technology, Zibo, China
- Shandong Provincial Key Laboratory of Precision Manufacturing and Non-Traditional Machining, Zibo, China
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Chen Y, Wu Y, Yan G, Zhang G. Tertiary lymphoid structures in cancer: maturation and induction. Front Immunol 2024; 15:1369626. [PMID: 38690273 PMCID: PMC11058640 DOI: 10.3389/fimmu.2024.1369626] [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: 01/17/2024] [Accepted: 04/05/2024] [Indexed: 05/02/2024] Open
Abstract
Tertiary lymphoid structure (TLS) is an ectopic lymphocyte aggregate formed in peripheral non-lymphoid tissues, including inflamed or cancerous tissue. Tumor-associated TLS serves as a prominent center of antigen presentation and adaptive immune activation within the periphery, which has exhibited positive prognostic value in various cancers. In recent years, the concept of maturity regarding TLS has been proposed and mature TLS, characterized by well-developed germinal centers, exhibits a more potent tumor-suppressive capacity with stronger significance. Meanwhile, more and more evidence showed that TLS can be induced by therapeutic interventions during cancer treatments. Thus, the evaluation of TLS maturity and the therapeutic interventions that induce its formation are critical issues in current TLS research. In this review, we aim to provide a comprehensive summary of the existing classifications for TLS maturity and therapeutic strategies capable of inducing its formation in tumors.
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Affiliation(s)
- Yulu Chen
- Department of Phototherapy, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China
- Skin Cancer Center, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Photomedicine, School of Medicine, Tongji University, Shanghai, China
| | - Yuhao Wu
- Department of Phototherapy, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China
- Skin Cancer Center, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Photomedicine, School of Medicine, Tongji University, Shanghai, China
| | - Guorong Yan
- Department of Phototherapy, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China
- Skin Cancer Center, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Photomedicine, School of Medicine, Tongji University, Shanghai, China
| | - Guolong Zhang
- Department of Phototherapy, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China
- Skin Cancer Center, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Photomedicine, School of Medicine, Tongji University, Shanghai, China
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5
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Wang M, Rajkumar S, Lai Y, Liu X, He J, Ishikawa T, Nallapothula D, Singh RR. Tertiary lymphoid structures as local perpetuators of organ-specific immune injury: implication for lupus nephritis. Front Immunol 2023; 14:1204777. [PMID: 38022566 PMCID: PMC10644380 DOI: 10.3389/fimmu.2023.1204777] [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: 04/12/2023] [Accepted: 10/17/2023] [Indexed: 12/01/2023] Open
Abstract
In response to inflammatory stimuli in conditions such as autoimmune disorders, infections and cancers, immune cells organize in nonlymphoid tissues, which resemble secondary lymphoid organs. Such immune cell clusters are called tertiary lymphoid structures (TLS). Here, we describe the potential role of TLS in the pathogenesis of autoimmune disease, focusing on lupus nephritis, a condition that incurs major morbidity and mortality. In the kidneys of patients and animals with lupus nephritis, the presence of immune cell aggregates with similar cell composition, structure, and gene signature as lymph nodes and of lymphoid tissue-inducer and -organizer cells, along with evidence of communication between stromal and immune cells are indicative of the formation of TLS. TLS formation in kidneys affected by lupus may be instigated by local increases in lymphorganogenic chemokines such as CXCL13, and in molecules associated with leukocyte migration and vascularization. Importantly, the presence of TLS in kidneys is associated with severe tubulointerstitial inflammation, higher disease activity and chronicity indices, and poor response to treatment in patients with lupus nephritis. TLS may contribute to the pathogenesis of lupus nephritis by increasing local IFN-I production, facilitating the recruitment and supporting survival of autoreactive B cells, maintaining local production of systemic autoantibodies such as anti-dsDNA and anti-Sm/RNP autoantibodies, and initiating epitope spreading to local autoantigens. Resolution of TLS, along with improvement in lupus, by treating animals with soluble BAFF receptor, docosahexaenoic acid, complement inhibitor C4BP(β-), S1P1 receptor modulator Cenerimod, dexamethasone, and anti-CXCL13 further emphasizes a role of TLS in the pathogenesis of lupus. However, the mechanisms underlying TLS formation and their roles in the pathogenesis of lupus nephritis are not fully comprehended. Furthermore, the lack of non-invasive methods to visualize/quantify TLS in kidneys is also a major hurdle; however, recent success in visualizing TLS in lupus-prone mice by photon emission computed tomography provides hope for early detection and manipulation of TLS.
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Affiliation(s)
- Meiying Wang
- Department of Rheumatology and Immunology, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
- Peking University Shenzhen Hosiptal, Shenzhen, China
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, United States
| | - Snehin Rajkumar
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, United States
| | - Yupeng Lai
- Department of Rheumatology and Immunology, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Xingjiao Liu
- Department of Rheumatology and Immunology, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Jing He
- Department of Rheumatology and Immunology, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
- Department of Nephrology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Tatsuya Ishikawa
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, United States
| | - Dhiraj Nallapothula
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, United States
| | - Ram Raj Singh
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, United States
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
- Molecular Toxicology Interdepartmental Program, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
- Jonsson Comprehensive Cancer Center, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
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Sun X, Lu Y, Wu J, Wen Q, Li Z, Tang Y, Shi Y, He T, Liu L, Huang W, Weng C, Wu Q, Xiao Q, Yuan H, Xu Q, Cai J. Meta-Analysis of Single-Cell RNA-Seq Data Reveals the Mechanism of Formation and Heterogeneity of Tertiary Lymphoid Organ in Vascular Disease. Arterioscler Thromb Vasc Biol 2023; 43:1867-1886. [PMID: 37589134 PMCID: PMC10521807 DOI: 10.1161/atvbaha.123.318762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 08/01/2023] [Indexed: 08/18/2023]
Abstract
BACKGROUND Tertiary lymphoid organs (TLOs) are ectopic lymphoid organs developed in nonlymphoid tissues with chronic inflammation, but little is known about their existence in different types of vascular diseases and the mechanism that mediated their development. METHODS To take advantage of single-cell RNA sequencing techniques, we integrated 28 single-cell RNA sequencing data sets containing 5 vascular disease models (atherosclerosis, abdominal aortic aneurysm, intimal hyperplasia, isograft, and allograft) to explore TLOs existence and environment supporting its growth systematically. We also searched Medline, Embase, PubMed, and Web of Science from inception to January 2022 for published histological images of vascular remodeling for histological evidence to support TLO genesis. RESULTS Accumulation and infiltration of innate and adaptive immune cells have been observed in various remodeling vessels. Interestingly, the proportion of such immune cells incrementally increases from atherosclerosis to intimal hyperplasia, abdominal aortic aneurysm, isograft, and allograft. Importantly, we uncovered that TLO structure cells, such as follicular helper T cells and germinal center B cells, present in all remodeled vessels. Among myeloid cells and lymphocytes, inflammatory macrophages, and T helper 17 cells are the major lymphoid tissue inducer cells which were found to be positively associated with the numbers of TLO structural cells in remodeled vessels. Vascular stromal cells also actively participate in vascular TLO genesis by communicating with myeloid cells and lymphocytes via CCLs (C-C motif chemokine ligands), CXCL (C-X-C motif ligand), lymphotoxin, BMP (bone morphogenetic protein) chemotactic, FGF-2 (fibroblast growth factor-2), and IGF (insulin growth factor) proliferation mechanisms, particularly for lymphoid tissue inducer cell aggregation. Additionally, the interaction between stromal cells and immune cells modulates extracellular matrix remodeling. Among TLO structure cells, follicular helper T, and germinal center B cells have strong interactions via TCR (T-cell receptor), CD40 (cluster of differentiation 40), and CXCL signaling, to promote the development and maturation of the germinal center in TLO. Consistently, by reviewing the histological images from the literature, TLO genesis was found in those vascular remodeling models. CONCLUSIONS Our analysis showed the existence of TLOs across 5 models of vascular diseases. The mechanisms that support TLOs formation in different models are heterogeneous. This study could be a valuable resource for understanding and discovering new therapeutic targets for various forms of vascular disease.
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Affiliation(s)
- Xuejing Sun
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Yao Lu
- The Center of Clinical Pharmacology (Y.L., H.Y.), Central South University, Changsha, China
| | - Junru Wu
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Qing Wen
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Zhengxin Li
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Yan Tang
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Yunmin Shi
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Tian He
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Lun Liu
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Wei Huang
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Chunyan Weng
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
| | - Qing Wu
- The Third Xiangya Hospital and High-Performance Computing Center (Q. Wu), Central South University, Changsha, China
| | - Qingzhong Xiao
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, United Kingdom (Q. Xiao, Q. Xu)
| | - Hong Yuan
- The Center of Clinical Pharmacology (Y.L., H.Y.), Central South University, Changsha, China
| | - Qingbo Xu
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, United Kingdom (Q. Xiao, Q. Xu)
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, China (Q. Xu)
| | - Jingjing Cai
- Department of Cardiology (X.S., J.W., Q. Wen, Z.L., Y.T., Y.S., T.H., L.L., W.H., C.W., J.C.), Central South University, Changsha, China
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Brodeur A, Migneault F, Lanoie M, Beillevaire D, Turgeon J, Karakeussian-Rimbaud A, Thibodeau N, Boilard É, Dieudé M, Hébert MJ. Apoptotic exosome-like vesicles transfer specific and functional mRNAs to endothelial cells by phosphatidylserine-dependent macropinocytosis. Cell Death Dis 2023; 14:449. [PMID: 37474514 PMCID: PMC10359336 DOI: 10.1038/s41419-023-05991-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 06/28/2023] [Accepted: 07/13/2023] [Indexed: 07/22/2023]
Abstract
Apoptosis of endothelial cells prompts the release of apoptotic exosome-like vesicles (ApoExos), subtype extracellular vesicles secreted by apoptotic cells after caspase-3 activation. ApoExos are different from both apoptotic bodies and classical exosomes in their protein and nucleic acid contents and functions. In contrast to classical apoptotic bodies, ApoExos induce immunogenic responses that can be maladaptive when not tightly regulated. In the present study, we elucidated the mechanisms by which ApoExos are internalized by endothelial cells, which leads to shared specific and functional mRNAs of importance to endothelial function. Using flow cytometry and confocal microscopy, we revealed that ApoExos were actively internalized by endothelial cells. SiRNA-induced inhibition of classical endocytosis pathways with pharmacological inhibitors showed that ApoExos were internalized via phosphatidylserine-dependent macropinocytosis independently of classical endocytosis pathways. An electron microscopy analysis revealed that ApoExos increased the macropinocytosis rate in endothelial cells, setting in motion a positive feedback loop that increased the amount of internalized ApoExos. Deep sequencing of total RNA revealed that ApoExos possessed a unique protein-coding RNA profile, with PCSK5 being the most abundant mRNA. Internalization of ApoExos by cells led to the transfer of this RNA content from the ApoExos to cells. Specifically, PCSK5 mRNA was transferred to cells that had taken up ApoExos, and these cells subsequently expressed PCSK5. Collectively, our findings suggest that macropinocytosis is an effective entry pathway for the delivery of RNAs carried by ApoExos and that these RNAs are functionally expressed by the endothelial cells that internalize them. As ApoExos express a specific mRNA signature, these results suggest new avenues to understand how ApoExos produced at sites of vascular injury impact vascular function.
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Affiliation(s)
- Alexandre Brodeur
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), Edmonton, AL, Canada
- Département de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Francis Migneault
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), Edmonton, AL, Canada
| | - Maude Lanoie
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), Edmonton, AL, Canada
- Département de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Déborah Beillevaire
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), Edmonton, AL, Canada
- Département de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Julie Turgeon
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), Edmonton, AL, Canada
| | - Annie Karakeussian-Rimbaud
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC, Canada
| | - Nicolas Thibodeau
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC, Canada
| | - Éric Boilard
- Canadian Donation and Transplantation Research Program (CDTRP), Edmonton, AL, Canada
- Centre de Recherche, Centre Hospitalier Universitaire (CHU) de Québec-Université Laval, Département de Microbiologie et Immunologie, Québec, QC, Canada
| | - Mélanie Dieudé
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC, Canada
- Canadian Donation and Transplantation Research Program (CDTRP), Edmonton, AL, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
- Héma-Québec, Québec, QC, Canada
| | - Marie-Josée Hébert
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal (CRCHUM) and Université de Montréal, Montréal, QC, Canada.
- Canadian Donation and Transplantation Research Program (CDTRP), Edmonton, AL, Canada.
- Département de Médecine, Université de Montréal, Montréal, QC, Canada.
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8
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Heterogeneity of Extracellular Vesicles and Particles: Molecular Voxels in the Blood Borne "Hologram" of Organ Function, Disfunction and Cancer. Arch Immunol Ther Exp (Warsz) 2023; 71:5. [PMID: 36729313 DOI: 10.1007/s00005-023-00671-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 12/17/2022] [Indexed: 02/03/2023]
Abstract
Extracellular vesicles (EVs) and particles (EPs) serve as unique carriers of complex molecular information with increasingly recognized roles in health and disease. Individual EVs/EPs collectively contribute to the molecular fingerprint of their producing cell, reflecting its identity, state, function and phenotype. This property is of particular interest in cancer where enormous heterogeneity of cancer cells is compounded by the presence of altered stromal, vascular and immune cell populations, which is further complicated by systemic responses elicited by the disease in individual patients. These diverse and interacting cellular compartments are dynamically represented by myriads of EVs/EPs released into the circulating biofluids (blood) during cancer progression and treatment. Current approaches of liquid biopsy seek to follow specific elements of the EV/EP cargo that may have diagnostic utility (as biomarkers), such as cancer cell-derived mutant oncoproteins or nucleic acids. However, with emerging technologies enabling high-throughput EV/EP analysis at a single particle level, a more holistic approach may be on the horizon. Indeed, each EV/EP carries multidimensional information (molecular "voxel") that could be integrated across thousands of particles into a larger and unbiased landscape (EV/EP "hologram") reflecting the true cellular complexity of the disease, along with cellular interactions, systemic responses and effects of treatment. Thus, the longitudinal molecular mapping of EV/EP populations may add a new dimension to crucial aspects of cancer biology, personalized diagnostics, and therapy.
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9
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Huang DL, He YR, Liu YJ, He HY, Gu ZY, Liu YM, Liu WJ, Luo Z, Ju MJ. The immunomodulation role of Th17 and Treg in renal transplantation. Front Immunol 2023; 14:1113560. [PMID: 36817486 PMCID: PMC9928745 DOI: 10.3389/fimmu.2023.1113560] [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: 12/01/2022] [Accepted: 01/09/2023] [Indexed: 02/04/2023] Open
Abstract
Kidney transplantation (KT) is an ultimate treatment of end-stage chronic kidney disease, which can meet a lot of complications induced by immune system. With under-controlled immunosuppression, the patient will obtain a good prognosis. Otherwise, allograft disfunction will cause severe organ failure and even immune collapse. Acute or chronic allograft dysfunction after KT is related to Th17, Treg, and Th17/Treg to a certain extent. Elevated Th17 levels may lead to acute rejection or chronic allograft dysfunction. Treg mainly plays a protective role on allografts by regulating immune response. The imbalance of the two may further aggravate the balance of immune response and damage the allograft. Controlling Th17 level, improving Treg function and level, and adjusting Th17/Treg ratio may have positive effects on longer allograft survival and better prognosis of receptors.
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Affiliation(s)
- Dan-Lei Huang
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yi-Ran He
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yu-Jing Liu
- Department of Nursing, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Hong-Yu He
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhun-Yong Gu
- Department of Urinary Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yi-Mei Liu
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Wen-Jun Liu
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhe Luo
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China,*Correspondence: Min-Jie Ju, ; Zhe Luo,
| | - Min-Jie Ju
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China,*Correspondence: Min-Jie Ju, ; Zhe Luo,
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10
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Dieudé M, Hébert MJ. Extracellular vesicles beyond biomarkers: Effectors of antibody-mediated rejection. Am J Transplant 2022; 22:2131-2132. [PMID: 35776663 DOI: 10.1111/ajt.17133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Mélanie Dieudé
- Research Centre, Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Université de Montréal, Montréal, Québec, Canada.,Héma-Québec, Montréal, Québec, Canada.,Canadian National Transplantation Research Program, Edmonton, Alberta, Canada
| | - Marie-Josée Hébert
- Research Centre, Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.,Université de Montréal, Montréal, Québec, Canada.,Canadian National Transplantation Research Program, Edmonton, Alberta, Canada
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11
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Franzin R, Stasi A, Sallustio F, Bruno S, Merlotti G, Quaglia M, Grandaliano G, Pontrelli P, Thurman JM, Camussi G, Stallone G, Cantaluppi V, Gesualdo L, Castellano G. Extracellular vesicles derived from patients with antibody-mediated rejection induce tubular senescence and endothelial to mesenchymal transition in renal cells. Am J Transplant 2022; 22:2139-2157. [PMID: 35583104 PMCID: PMC9546277 DOI: 10.1111/ajt.17097] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 01/25/2023]
Abstract
Extracellular vesicles (EV) are emerging mediators in several diseases. However, their role in the pathophysiology of antibody-mediated allograft rejection (AMR) has been poorly investigated. Here, we investigated the role of EV isolated from AMR patients in inducing tubular senescence and endothelial to mesenchymal transition (EndMT) and analyzed their miRNA expression profile. By multiplex bead flow cytometry, we characterized the immunophenotype of plasma AMR-derived EV and found a prevalent platelet and endothelial cell origin. In vitro, AMR-derived EV induced tubular senescence by upregulating SA-β Gal and CDKN1A mRNA. Furthermore, AMR-derived EV induced EndMT. The occurrence of tubular senescence and EndMT was confirmed by analysis of renal biopsies from the same AMR patients. Moreover, AMR-derived EV induced C3 gene upregulation and CFH downregulation in tubular epithelial cells, with C4d deposition on endothelial cells. Interestingly, RNase-mediated digestion of EV cargo completely abrogated tubular senescence and EndMT. By microarray analysis, miR-604, miR-515-3p, miR-let-7d-5p, and miR-590-3p were significantly upregulated in EV from AMR group compared with transplant controls, whereas miR-24-3p and miR-29a-3p were downregulated. Therefore, EV-associated miRNA could act as active player in AMR pathogenesis, unraveling potential mechanisms of accelerated graft senescence, complement activation and early fibrosis that might lead to new therapeutic intervention.
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Affiliation(s)
- Rossana Franzin
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ TransplantationUniversity of Bari Aldo MoroBariItaly
| | - Alessandra Stasi
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ TransplantationUniversity of Bari Aldo MoroBariItaly
| | - Fabio Sallustio
- Interdisciplinary Department of Medicine (DIM)University of Bari "Aldo Moro"BariItaly
| | - Stefania Bruno
- Department of Medical Sciences and Molecular Biotechnology CenterUniversity of TorinoTorinoItaly
| | - Guido Merlotti
- Nephrology and Kidney Transplantation Unit, Department of Translational Medicine and Center for Autoimmune and Allergic Diseases (CAAD)University of Piemonte Orientale (UPO)NovaraItaly
| | - Marco Quaglia
- Nephrology and Kidney Transplantation Unit, Department of Translational Medicine and Center for Autoimmune and Allergic Diseases (CAAD)University of Piemonte Orientale (UPO)NovaraItaly
| | - Giuseppe Grandaliano
- Department Translational Medicine and SurgeryUniversità Cattolica Sacro CuoreRomeItaly
| | - Paola Pontrelli
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ TransplantationUniversity of Bari Aldo MoroBariItaly
| | - Joshua M. Thurman
- Department of MedicineUniversity of Colorado School of MedicineAuroraColoradoUSA
| | - Giovanni Camussi
- Department of Medical Sciences and Molecular Biotechnology CenterUniversity of TorinoTorinoItaly
| | - Giovanni Stallone
- Nephrology, Dialysis and Transplantation Unit, Advanced Research Center on Kidney Aging (A.R.K.A.), Department of Medical and Surgical SciencesUniversity of FoggiaFoggiaItaly
| | - Vincenzo Cantaluppi
- Nephrology and Kidney Transplantation Unit, Department of Translational Medicine and Center for Autoimmune and Allergic Diseases (CAAD)University of Piemonte Orientale (UPO)NovaraItaly
| | - Loreto Gesualdo
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ TransplantationUniversity of Bari Aldo MoroBariItaly
| | - Giuseppe Castellano
- Unit of NephrologyDialysis and Renal Transplantation ‐ Fondazione IRCCS Ca’Granda Ospedale Maggiore Policlinico di MilanoMilanItaly
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12
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Jia Z, Jia J, Yao L, Li Z. Crosstalk of Exosomal Non-Coding RNAs in The Tumor Microenvironment: Novel Frontiers. Front Immunol 2022; 13:900155. [PMID: 35663957 PMCID: PMC9162146 DOI: 10.3389/fimmu.2022.900155] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 04/22/2022] [Indexed: 12/18/2022] Open
Abstract
The tumor microenvironment (TME) is defined as a complex and dynamic tissue entity composed of endothelial, stromal, immune cells, and the blood system. The homeostasis and evolution of the TME are governed by intimate interactions among cellular compartments. The malignant behavior of cancer cells, such as infiltrating growth, proliferation, invasion, and metastasis, is predominantly dependent on the bidirectional communication between tumor cells and the TME. And such dialogue mainly involves the transfer of multifunctional regulatory molecules from tumor cells and/or stromal cells within the TME. Interestingly, increasing evidence has confirmed that exosomes carrying regulatory molecules, proteins, and nucleic acids act as an active link in cellular crosstalk in the TME. Notably, extensive studies have identified non-coding RNAs (ncRNAs), including long non-coding RNAs (lncRNAs), microRNAs (miRNAs), and circular RNAs (circRNAs), that could be encapsulated by exosomes, which regulate the coordinated function within the TME and thus participate in cancer development and progression. In this review, we summarize recent literature around the topic of the functions and mechanisms of exosomal ncRNAs in the TME and highlight their clinical significance.
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Affiliation(s)
- Zimo Jia
- Department of Biochemistry and Molecular Biology, Hebei Medical University, Shijiazhuang, China.,The Second General Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Jinlin Jia
- National Research Institute for Family Planning, National Human Genetic Resources Center, Beijing, China.,Graduate School, Peking Union Medical College, Beijing, China
| | - Lihui Yao
- Department of Otolaryngology, Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou, China
| | - Zhihan Li
- The Second General Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
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13
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Ravichandran R, Bansal S, Rahman M, Sureshbabu A, Sankpal N, Fleming T, Bharat A, Mohanakumar T. Extracellular Vesicles Mediate Immune Responses to Tissue-Associated Self-Antigens: Role in Solid Organ Transplantations. Front Immunol 2022; 13:861583. [PMID: 35572510 PMCID: PMC9094427 DOI: 10.3389/fimmu.2022.861583] [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: 01/24/2022] [Accepted: 03/28/2022] [Indexed: 11/13/2022] Open
Abstract
Transplantation is a treatment option for patients diagnosed with end-stage organ diseases; however, long-term graft survival is affected by rejection of the transplanted organ by immune and nonimmune responses. Several studies have demonstrated that both acute and chronic rejection can occur after transplantation of kidney, heart, and lungs. A strong correlation has been reported between de novo synthesis of donor-specific antibodies (HLA-DSAs) and development of both acute and chronic rejection; however, some transplant recipients with chronic rejection do not have detectable HLA-DSAs. Studies of sera from such patients demonstrate that immune responses to tissue-associated antigens (TaAgs) may also play an important role in the development of chronic rejection, either alone or in combination with HLA-DSAs. The synergistic effect between HLA-DSAs and antibodies to TaAgs is being established, but the underlying mechanism is yet to be defined. We hypothesize that HLA-DSAs damage the transplanted donor organ resulting in stress and leading to the release of extracellular vesicles, which contribute to chronic rejection. These vesicles express both donor human leukocyte antigen (HLA) and non-HLA TaAgs, which can activate antigen-presenting cells and lead to immune responses and development of antibodies to both donor HLA and non-HLA tissue-associated Ags. Extracellular vesicles (EVs) are released by cells under many circumstances due to both physiological and pathological conditions. Primarily employing clinical specimens obtained from human lung transplant recipients undergoing acute or chronic rejection, our group has demonstrated that circulating extracellular vesicles display both mismatched donor HLA molecules and lung-associated Ags (collagen-V and K-alpha 1 tubulin). This review focuses on recent studies demonstrating an important role of antibodies to tissue-associated Ags in the rejection of transplanted organs, particularly chronic rejection. We will also discuss the important role of extracellular vesicles released from transplanted organs in cross-talk between alloimmunity and autoimmunity to tissue-associated Ags after solid organ transplantation.
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Affiliation(s)
| | - Sandhya Bansal
- Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Mohammad Rahman
- Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Angara Sureshbabu
- Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Narendra Sankpal
- Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Timothy Fleming
- Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Ankit Bharat
- Department of Surgery-Thoracic, Northwestern University, Chicago, IL, United States
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14
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Rutman AK, Negi S, Saberi N, Khan K, Tchervenkov J, Paraskevas S. Extracellular Vesicles From Kidney Allografts Express miR-218-5p and Alter Th17/Treg Ratios. Front Immunol 2022; 13:784374. [PMID: 35281056 PMCID: PMC8906931 DOI: 10.3389/fimmu.2022.784374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 02/03/2022] [Indexed: 01/18/2023] Open
Abstract
Delayed graft function (DGF) in kidney transplantation is associated with ischemic injury and carries long term functional and immunological risks. Extracellular vesicles (EV) released from allografts may signal a degree of ischemic stress, and are thought to play an important role in the development of anti-donor immunity. Here, we show that kidney perfusate-derived extracellular vesicles (KP-EV) express donor-specific human leukocyte antigen. KP-EV from kidneys that experience DGF increase the T-helper 17 (Th17) to T-regulatory (Treg) ratio in third party peripheral blood mononuclear cells to a greater degree than those from kidneys with immediate function. We report miR-218-5p upregulation in KP-EV of kidney transplant recipients with DGF. Levels of miR-218-5p in KP-EV inversely correlated with recipient eGFR at multiple time points following transplantation. Additionally, the degree of increase in Th17/Treg ratio by KP-EV positively correlated with miR-218-5p expression in KP-EV samples. Taken together, these data provide evidence that KP-EV may contribute to modulating immune responses in transplant recipients. This could lead to novel intervention strategies to inhibit DGF in order to improve graft function and survival.
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Affiliation(s)
- Alissa K Rutman
- Department of Surgery, McGill University, Montréal, QC, Canada.,Transplantation Immunology Laboratory, Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Sarita Negi
- Department of Surgery, McGill University, Montréal, QC, Canada.,Transplantation Immunology Laboratory, Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Nasim Saberi
- Department of Surgery, McGill University, Montréal, QC, Canada
| | - Kashif Khan
- Division of Cardiology and Cardiac Surgery, McGill University Health Centre, Montréal, QC, Canada
| | - Jean Tchervenkov
- Department of Surgery, McGill University, Montréal, QC, Canada.,Transplantation Immunology Laboratory, Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Steven Paraskevas
- Department of Surgery, McGill University, Montréal, QC, Canada.,Transplantation Immunology Laboratory, Research Institute of the McGill University Health Centre, Montréal, QC, Canada
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15
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Autolysosomes and caspase-3 control the biogenesis and release of immunogenic apoptotic exosomes. Cell Death Dis 2022; 13:145. [PMID: 35149669 PMCID: PMC8837616 DOI: 10.1038/s41419-022-04591-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 01/04/2022] [Accepted: 01/27/2022] [Indexed: 12/23/2022]
Abstract
Apoptotic exosome-like vesicles (ApoExos) are a novel type of extracellular vesicle that contribute to the propagation of inflammation at sites of vascular injury when released by dying cells. ApoExos are characterized by the presence of the C-terminal perlecan LG3 fragment and 20S proteasome, and they are produced downstream of caspase-3 activation. In the present study, we assessed the relative roles of autophagy and caspase-3-mediated pathways in controlling the biogenesis and secretion of immunogenic ApoExos. Using electron microscopy and confocal immunofluorescence microscopy in serum-starved endothelial cells, we identified large autolysosomes resulting from the fusion of lysosomes, multivesicular bodies, and autophagosomes as a site of ApoExo biogenesis. Inhibition of autophagy with ATG7 siRNA or biochemical inhibitors (wortmannin and bafilomycin) coupled with proteomics analysis showed that autophagy regulated the processing of perlecan into LG3 and its loading onto ApoExos but was dispensable for ApoExo biogenesis. Caspase-3 activation was identified using caspase-3-deficient endothelial cells or caspase inhibitors as a pivotal regulator of fusion events between autolysosomes and the cell membrane, therefore regulating the release of immunogenic ApoExos. Collectively, these findings identified autolysosomes as a site of ApoExo biogenesis and caspase-3 as a crucial regulator of autolysosome cell membrane interactions involved in the secretion of immunogenic ApoExos.
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16
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Callemeyn J, Lamarthée B, Koenig A, Koshy P, Thaunat O, Naesens M. Allorecognition and the spectrum of kidney transplant rejection. Kidney Int 2021; 101:692-710. [PMID: 34915041 DOI: 10.1016/j.kint.2021.11.029] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 10/05/2021] [Accepted: 11/08/2021] [Indexed: 12/18/2022]
Abstract
Detection of mismatched human leukocyte antigens by adaptive immune cells is considered as the main cause of transplant rejection, leading to either T-cell mediated rejection or antibody-mediated rejection. This canonical view guided the successful development of immunosuppressive therapies and shaped the diagnostic Banff classification for kidney transplant rejection that is used in clinics worldwide. However, several observations have recently emerged that question this dichotomization between T-cell mediated rejection and antibody-mediated rejection, related to heterogeneity in the serology, histology, and prognosis of the rejection phenotypes. In parallel, novel insights were obtained concerning the dynamics of donor-specific anti-human leukocyte antigen antibodies, the immunogenicity of donor-recipient non-human leukocyte antigen mismatches, and the autoreactivity against self-antigens. Moreover, the potential of innate allorecognition was uncovered, as exemplified by natural killer cell-mediated microvascular inflammation through missing self, and by the emerging evidence on monocyte-driven allorecognition. In this review, we highlight the gaps in the current classification of rejection, provide an overview of the expanding insights into the mechanisms of allorecognition, and critically appraise how these could improve our understanding and clinical approach to kidney transplant rejection. We argue that consideration of the complex interplay of various allorecognition mechanisms can foster a more integrated view of kidney transplant rejection and can lead to improved risk stratification, targeted therapies, and better outcome after kidney transplantation.
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Affiliation(s)
- Jasper Callemeyn
- Nephrology and Renal Transplantation Research Group, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium; Department of Nephrology and Renal Transplantation, University Hospitals Leuven, Leuven, Belgium
| | - Baptiste Lamarthée
- Nephrology and Renal Transplantation Research Group, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium; Necker-Enfants Malades Institute, French National Institute of Health and Medical Research (INSERM) Unit 1151, Paris, France
| | - Alice Koenig
- CIRI, INSERM U1111, Université Claude Bernard Lyon I, CNRS UMR5308, Ecole Normale Supérieure de Lyon, University Lyon, Lyon, France; Department of Transplantation, Nephrology and Clinical Immunology, Hospices Civils de Lyon, Edouard Herriot Hospital, Lyon, France; Lyon-Est Medical Faculty, Claude Bernard University (Lyon 1), Lyon, France
| | - Priyanka Koshy
- Department of Morphology and Molecular Pathology, University Hospitals Leuven, Leuven, Belgium
| | - Olivier Thaunat
- CIRI, INSERM U1111, Université Claude Bernard Lyon I, CNRS UMR5308, Ecole Normale Supérieure de Lyon, University Lyon, Lyon, France; Department of Transplantation, Nephrology and Clinical Immunology, Hospices Civils de Lyon, Edouard Herriot Hospital, Lyon, France; Lyon-Est Medical Faculty, Claude Bernard University (Lyon 1), Lyon, France
| | - Maarten Naesens
- Nephrology and Renal Transplantation Research Group, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium; Department of Nephrology and Renal Transplantation, University Hospitals Leuven, Leuven, Belgium.
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17
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Fan X, Zhang J, Dai Y, Shan K, Xu J. Blockage of P2X7R suppresses Th1/Th17-mediated immune responses and corneal allograft rejection via inhibiting NLRP3 inflammasome activation. Exp Eye Res 2021; 212:108792. [PMID: 34656546 DOI: 10.1016/j.exer.2021.108792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 09/10/2021] [Accepted: 10/11/2021] [Indexed: 01/03/2023]
Abstract
P2X7R is a vital modifier of various inflammatory and immune-related diseases. However, the immunomodulatory effects of P2X7R on corneal allograft rejection remains unknown. Here we showed that P2X7R expression was significantly upregulated in corneal grafts of allogeneic transplant mice. Pharmacological blockage of P2X7R remarkably prolonged graft survival time, and reduced inflammatory cell infiltration in corneal grafts, in particular Th1/Th17 cells. Meanwhile, the frequencies of Th1/Th17 cells in draining lymph nodes were significantly decreased in P2X7R blocked allogeneic mice. Further results showed that the effect of P2X7R on promoting Th1/Th17 mediated immune responses in corneal allograft rejection relied heavily on its activation on the NLRP3/caspase-1/IL-1β axis, while P2X7R blockage could mitigate such activation. Nevertheless, the addition of IL-1β in vivo abrogated the protective effect of P2X7R blockage on promoting corneal graft survival. These findings demonstrate that blockage of P2X7R can substantially alleviate corneal allograft rejection and promote grafts survival, highlighting it as a promising target for preventing or treating corneal allograft rejection.
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Affiliation(s)
- Xiangyu Fan
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, 200031, China
| | - Jing Zhang
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Fudan University, Shanghai, 200031, China; NHC Key Laboratory of Myopia (Fudan University), Chinese Academy of Medical Sciences, Shanghai, 200031, China
| | - Yiqin Dai
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Fudan University, Shanghai, 200031, China; NHC Key Laboratory of Myopia (Fudan University), Chinese Academy of Medical Sciences, Shanghai, 200031, China
| | - Kun Shan
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, 200031, China
| | - Jianjiang Xu
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, 200031, China; Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Fudan University, Shanghai, 200031, China; NHC Key Laboratory of Myopia (Fudan University), Chinese Academy of Medical Sciences, Shanghai, 200031, China.
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18
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Increased Autoantibodies Against Ro/SS-A, CENP-B, and La/SS-B in Patients With Kidney Allograft Antibody-mediated Rejection. Transplant Direct 2021; 7:e768. [PMID: 34557585 PMCID: PMC8454907 DOI: 10.1097/txd.0000000000001215] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 07/02/2021] [Indexed: 01/20/2023] Open
Abstract
Supplemental Digital Content is available in the text. Antibody-mediated rejection (AMR) causes more than 50% of late kidney graft losses. In addition to anti-human leukocyte antigen (HLA) donor-specific antibodies, antibodies against non-HLA antigens are also linked to AMR. Identifying key non-HLA antibodies will improve our understanding of AMR.
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19
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Dieudé M, Kaci I, Hébert MJ. The Impact of Programmed Cell Death on the Formation of Tertiary Lymphoid Structures. Front Immunol 2021; 12:696311. [PMID: 34335608 PMCID: PMC8320843 DOI: 10.3389/fimmu.2021.696311] [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: 04/16/2021] [Accepted: 06/28/2021] [Indexed: 01/14/2023] Open
Abstract
Tertiary lymphoid structures are clusters of lymphoid tissue that develop post-natally at sites of chronic inflammation. They have been described in association with infection, autoimmune disorders, cancer, and allograft rejection. In their mature stage, TLS function as ectopic germinal centers, favoring the local production of autoantibodies and cytokines. TLS formation tends to parallel the severity of tissue injury and they are usually indicative of locally active immune responses. The presence of TLS in patients with solid tumors is usually associated with a better prognosis whereas their presence predicts increased maladaptive immunologic activity in patients with autoimmune disorders or allograft transplantation. Recent data highlight a correlation between active cell death and TLS formation and maturation. Our group recently identified apoptotic exosome-like vesicles, released by apoptotic cells, as novel inducers of TLS formation. Here, we review mechanisms of TLS formation and maturation with a specific focus on the emerging importance of tissue injury, programmed cell death and extracellular vesicles in TLS biogenesis.
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Affiliation(s)
- Mélanie Dieudé
- Research Centre, Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada.,Department of Microbiology, Infectiology and Immunology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada.,Canadian Donation and Transplantation Research Program, Edmonton, AB, Canada
| | - Imane Kaci
- Research Centre, Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada.,Canadian Donation and Transplantation Research Program, Edmonton, AB, Canada.,Molecular Biology Programs, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Marie-Josée Hébert
- Research Centre, Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada.,Canadian Donation and Transplantation Research Program, Edmonton, AB, Canada.,Department of Medicine, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
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20
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Rossi AP, Alloway RR, Hildeman D, Woodle ES. Plasma cell biology: Foundations for targeted therapeutic development in transplantation. Immunol Rev 2021; 303:168-186. [PMID: 34254320 DOI: 10.1111/imr.13011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 06/22/2021] [Indexed: 12/20/2022]
Abstract
Solid organ transplantation is a life-saving procedure for patients with end-stage organ disease. Over the past 70 years, tremendous progress has been made in solid organ transplantation, particularly in T-cell-targeted immunosuppression and organ allocation systems. However, humoral alloimmune responses remain a major challenge to progress. Patients with preexisting antibodies to human leukocyte antigen (HLA) are at significant disadvantages in regard to receiving a well-matched organ, moreover, those who develop anti-HLA antibodies after transplantation face a significant foreshortening of renal allograft survival. Historical therapies to desensitize patients prior to transplantation or to treat posttransplant AMR have had limited effectiveness, likely because they do not significantly reduce antibody levels, as plasma cells, the source of antibody production, remain largely unaffected. Herein, we will discuss the significance of plasma cells in transplantation, aspects of their biology as potential therapeutic targets, clinical challenges in developing strategies to target plasma cells in transplantation, and lastly, novel approaches that have potential to advance the field.
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Affiliation(s)
- Amy P Rossi
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Immunology Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Rita R Alloway
- Division of Nephrology, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - David Hildeman
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Immunology Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - E Steve Woodle
- Division of Transplantation, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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21
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The role of non-HLA antibodies in solid organ transplantation: a complex deliberation. Curr Opin Organ Transplant 2021; 25:536-542. [PMID: 33044346 DOI: 10.1097/mot.0000000000000811] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE OF REVIEW There is tremendous interest in understanding when, if, and how non-HLA antibodies contribute to allograft injury. Numerous non-HLA target antigens have been identified and sensitization to these targets have been associated with delayed allograft function, rejection, and allograft failure. This review focuses on the clinical utility of HLA antibody testing, highlighting the strengths and limitations of current clinical studies, and the need for defining characteristics to inform non-HLA antibody pathogenicity. RECENT FINDINGS Clinical studies continue to show associations between non-HLA antibodies and rejection and reduced allograft survival across multiple transplanted organ types. The worst clinical outcomes continue to be observed among recipients testing positive for both non-HLA and donor-specific HLA antibodies. Mechanistic insights from both animal and clinical studies support a model in which tissue injury accompanied by an inflammatory environment influence non-HLA antibody formation and pathogenicity. SUMMARY Immune triggers that lead to non-HLA antibody formation and pathogenicity are complex and poorly understood. The ability of non-HLA antibodies to mediate allograft injury may depend upon their affinity and strength (titer), target specificity, density of the target antigen, and synergy with donor-specific HLA antibodies.
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22
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Xu Q, McAlister VC, House AA, Molinari M, Leckie S, Zeevi A. Autoantibodies to LG3 are associated with poor long-term survival after liver retransplantation. Clin Transplant 2021; 35:e14318. [PMID: 33871888 DOI: 10.1111/ctr.14318] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/12/2021] [Accepted: 04/02/2021] [Indexed: 12/21/2022]
Abstract
Autoantibodies are detrimental to the survival of organ transplantation. We demonstrated that Angiotensin II Type I Receptor agonistic autoantibodies (AT1R-AA) were associated with poor outcomes after liver retransplantation. To examine the effect of other autoantibodies, we studied a retrospective cohort of 93 patients who received a second liver transplant. Pre-retransplant sera were tested with Luminex-based solid-phase assays. Among 33 tested autoantibodies, 15 were significantly higher in 48 patients who lost their regrafts than 45 patients whose regrafts were still functioning. Specifically, patients with autoantibodies to the C-terminal laminin-like globular domain of Perlecan (LG3) experienced significantly worse regraft survival (p = .002) than those with negative LG3 autoantibodies (LG3-A). In multivariate analysis, LG3-A (HR = 2.35 [1.11-4.98], p = .027) and AT1R-AA (HR = 2.09 [1.07-4.10], p = .032) remained significant predictors of regraft loss after adjusting for recipient age and sex. There were synergistic deleterious effects on regraft survival in patients who were double-positive for LG3-A and donor-specific antibody (DSA) (HR = 5.26 [2.15-12.88], p = .001), or LG3-A and AT1R-AA (HR = 3.23 [1.37-7.66], p = .008). All six double-positive patients lost their liver regrafts. In conclusion, LG3-A is associated with inferior long-term outcomes of a second liver transplant. Screening anti-HLA antibodies and autoantibodies such as LG3-A/AT1R-AA identifies patients with a higher risk for liver transplantation.
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Affiliation(s)
- Qingyong Xu
- Department of Pathology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Vivian C McAlister
- Department of Surgery, University of Western Ontario, London, ON, Canada
| | - Andrew A House
- Department of Medicine, University of Western Ontario, London, ON, Canada
| | - Michele Molinari
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Steve Leckie
- Department of Pathology and Lab Medicine, London Health Science Center, London, ON, Canada
| | - Adriana Zeevi
- Department of Pathology, University of Pittsburgh, Pittsburgh, PA, USA
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23
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Zhang PL, Liu ML. Extracellular vesicles mediate cellular interactions in renal diseases-Novel views of intercellular communications in the kidney. J Cell Physiol 2021; 236:5482-5494. [PMID: 33432614 DOI: 10.1002/jcp.30268] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 12/23/2020] [Accepted: 12/26/2020] [Indexed: 12/28/2022]
Abstract
The kidney is a complicated and important internal organ receiving approximately 20% of the cardiac output and mediates numerous pathophysiologic actions. These include selectively filtering macromolecules of the blood, exquisite reclaimation of electrolyctes, urine concentration via an elegant osmotic mechanism, and excretion of an acid load. In addition, the renal tubules carry out secretory functions and produce hormones and cytokines. The kidney receives innervation and hormonal regulation. Therefore, dysfunction of the kidney leads to retention of metabolic waste products, and/or significant proteinuria and hematuria. In the past several decades, the role of extracellular vesicles (EVs) in intercellular communications, and the uptake of EVs by recipient cells through phagocytosis and endocytosis have been elucidated. The new knowledge on EVs expands over the classical mechanisms of cellular interaction, and may change our way of thinking of renal pathophysiology in the subcellular scale. Based on some ultrastructural discoveries in the kidney, this review will focus on the role of EVs in intercellular communications, their internalization by recipient cells, and their relationship to renal pathology.
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Affiliation(s)
- Ping L Zhang
- Division of Anatomic Pathology, Beaumont Laboratories, Beaumont Health, Royal Oak, Michigan, USA
| | - Ming-Lin Liu
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.,Corporal Michael J. Crescenz VA Medical Center, Philadelphia, Pennsylvania, USA
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24
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Apoptotic exosome-like vesicles regulate endothelial gene expression, inflammatory signaling, and function through the NF-κB signaling pathway. Sci Rep 2020; 10:12562. [PMID: 32724121 PMCID: PMC7387353 DOI: 10.1038/s41598-020-69548-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 07/06/2020] [Indexed: 12/19/2022] Open
Abstract
Persistent endothelial injury promotes maladaptive responses by favoring the release of factors leading to perturbation in vascular homeostasis and tissue architecture. Caspase-3 dependent death of microvascular endothelial cells leads to the release of unique apoptotic exosome-like vesicles (ApoExo). Here, we evaluate the impact of ApoExo on endothelial gene expression and function in the context of a pro-apoptotic stimulus. Endothelial cells exposed to ApoExo differentially express genes involved in cell death, inflammation, differentiation, and cell movement. Endothelial cells exposed to ApoExo showed inhibition of apoptosis, improved wound closure along with reduced angiogenic activity and reduced expression of endothelial markers consistent with the first phase of endothelial-to-mesenchymal transition (endoMT). ApoExo interaction with endothelial cells also led to NF-κB activation. NF-κB is known to participate in endothelial dysfunction in numerous diseases. Silencing NF-κB reversed the anti-apoptotic effect and the pro-migratory state and prevented angiostatic properties and CD31 downregulation in endothelial cells exposed to ApoExo. This study identifies vascular injury-derived extracellular vesicles (ApoExo) as novel drivers of NF-κB activation in endothelial cells and demonstrates the pivotal role of this signaling pathway in coordinating ApoExo-induced functional changes in endothelial cells. Hence, targeting ApoExo-mediated NF-κB activation in endothelial cells opens new avenues to prevent endothelial dysfunction.
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25
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Dieudé M, Turgeon J, Karakeussian Rimbaud A, Beillevaire D, Qi S, Patey N, Gaboury LA, Boilard É, Hébert M. Extracellular vesicles derived from injured vascular tissue promote the formation of tertiary lymphoid structures in vascular allografts. Am J Transplant 2020; 20:726-738. [PMID: 31729155 PMCID: PMC7064890 DOI: 10.1111/ajt.15707] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 09/16/2019] [Accepted: 10/10/2019] [Indexed: 01/25/2023]
Abstract
Tertiary lymphoid structures (TLS) accumulate at sites of chronic injury where they function as an ectopic germinal center, fostering local autoimmune responses. Vascular injury leads to the release of endothelial-derived apoptotic exosome-like vesicles (ApoExo) that contribute to rejection in transplanted organs. The purpose of the study was to evaluate the impact of ApoExo on TLS formation in a model of vascular allograft rejection. Mice transplanted with an allogeneic aortic transplant were injected with ApoExo. The formation of TLS was significantly increased by ApoExo injection along with vascular remodeling and increased levels of antinuclear antibodies and anti-perlecan/LG3 autoantibodies. ApoExo also enhanced allograft infiltration by γδT17 cells. Recipients deficient in γδT cells showed reduced TLS formation and lower autoantibodies levels following ApoExo injection. ApoExo are characterized by proteasome activity, which can be blocked by bortezomib. Bortezomib treated ApoExo reduced the recruitment of γδT17 cells to the allograft, lowered TLS formation, and reduced autoantibody production. This study identifies vascular injury-derived extracellular vesicles (ApoExo), as initiators of TLS formation and demonstrates the pivotal role of γδT17 in coordinating TLS formation and autoantibody production. Finally, our results suggest proteasome inhibition with bortezomib as a potential option for controlling TLS formation in rejected allografts.
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Affiliation(s)
- Mélanie Dieudé
- Research CentreCentre hospitalier de l'Université de Montréal (CRCHUM)MontréalQuébecCanada,Université de MontréalMontréalQuébecCanada,Canadian National Transplantation Research ProgramEdmontonAlbertaCanada
| | - Julie Turgeon
- Research CentreCentre hospitalier de l'Université de Montréal (CRCHUM)MontréalQuébecCanada,Canadian National Transplantation Research ProgramEdmontonAlbertaCanada
| | - Annie Karakeussian Rimbaud
- Research CentreCentre hospitalier de l'Université de Montréal (CRCHUM)MontréalQuébecCanada,Canadian National Transplantation Research ProgramEdmontonAlbertaCanada
| | - Déborah Beillevaire
- Research CentreCentre hospitalier de l'Université de Montréal (CRCHUM)MontréalQuébecCanada,Canadian National Transplantation Research ProgramEdmontonAlbertaCanada
| | - Shijie Qi
- Research CentreCentre hospitalier de l'Université de Montréal (CRCHUM)MontréalQuébecCanada,Canadian National Transplantation Research ProgramEdmontonAlbertaCanada
| | - Nathalie Patey
- Centre de recherche du CHU Ste‐JustineDépartement de pathologieUniversité de MontréalMontréalQuébecCanada,Canadian National Transplantation Research ProgramEdmontonAlbertaCanada
| | - Louis A. Gaboury
- Institute for Research in Immunology and Cancer & Department of Pathology and Cell BiologyUniversity of MontrealMontréalQuébecCanada
| | - Éric Boilard
- Centre de Recherche du CHU de QuébecUniversité LavalMontréalQuébecCanada,Canadian National Transplantation Research ProgramEdmontonAlbertaCanada
| | - Marie‐Josée Hébert
- Research CentreCentre hospitalier de l'Université de Montréal (CRCHUM)MontréalQuébecCanada,Université de MontréalMontréalQuébecCanada,Canadian National Transplantation Research ProgramEdmontonAlbertaCanada
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