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Møller DL, Sørensen SS, Perch M, Gustafsson F, Hald A, Knudsen AD, Abdulovski R, Arentoft NS, Lundgren J, Rasmussen A, Ostrowski SR, Nielsen SD. Differences in toll-like receptor ligand-induced cytokine concentrations before and after solid organ transplantation: A prospective, observational cohort study in a clinical setting. Scand J Immunol 2024; 99:e13337. [PMID: 38168873 DOI: 10.1111/sji.13337] [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: 07/17/2023] [Revised: 10/09/2023] [Accepted: 10/20/2023] [Indexed: 01/05/2024]
Abstract
Reliable methods to assess immune function after solid organ transplantation (SOT) are needed to guide dosing of immunosuppression. We hypothesized that toll-like receptor ligand-induced cytokine concentrations would decrease post-transplantation due to the use of immunosuppressive medication. Furthermore, we hypothesized that induced cytokine concentrations pre-transplantation would be higher in recipients with episodes of acute rejection post-transplantation due to underlying immunological dispositions. We aimed to investigate toll-like receptor ligand-induced cytokine concentrations by TruCulture©, a standardized immunoassay, in SOT recipients before and 3 months after SOT and explored associations with methylprednisolone-treated acute rejections. We conducted a prospective, observational cohort study including 123 participants (67 liver, 32 kidney and 24 lung transplant recipients). Whole blood was stimulated for 22 h with: (A) Lipopolysaccharide (LPS), (B) Resiquimod, (C) Polyinosinic:polycytidylic acid (Poly I:C) and (D) a blank control. Cytokine concentrations (TNF-α, IL-1β, IL-6, IL-8, IL-10, IL-12p40, IL-17A, IFN-α and IFN-γ) were measured by Luminex. 30 participants developed methylprednisolone-treated acute rejection at a median of 9 days (IQR 5-17) post-SOT. We found that all induced cytokine concentrations decreased post-SOT except from LPS-induced and Poly I:C-induced IL-10. The induced cytokine concentration pre-transplantation did not differ in recipients with or without acute rejection. In conclusion, the induced cytokine concentrations decreased for all stimuli post-SOT, except the anti-inflammatory cytokine IL-10. Importantly, recipients developing early acute rejection did not differ in induced cytokine concentrations pre-SOT. Thus, the use of a standardized assay in SOT is feasible in a clinical setting and may provide important information on the immune function post-SOT.
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Affiliation(s)
- Dina Leth Møller
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Søren Schwartz Sørensen
- Department of Nephrology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Michael Perch
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Cardiology, Section for Lung Transplantation, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Finn Gustafsson
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Cardiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Annemette Hald
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Andreas Delhbaek Knudsen
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Cardiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Ranya Abdulovski
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Nicoline Stender Arentoft
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Jens Lundgren
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- Centre of Excellence for Health, Immunity, and Infections, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Allan Rasmussen
- Department of Surgical Gastroenterology and Transplantation, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Sisse Rye Ostrowski
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Immunology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Susanne Dam Nielsen
- Viro-immunology Research Unit, Department of Infectious Diseases 8632, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Surgical Gastroenterology and Transplantation, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
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Hammond ME, Zollinger C, Vidic A, Snow GL, Stehlik J, Alharethi RA, Kfoury AG, Drakos S, Hammond MEH. Donor Age, Sex, and Cause of Death and Their Relationship to Heart Transplant Recipient Cardiac Death. J Clin Med 2023; 12:7629. [PMID: 38137698 PMCID: PMC10744178 DOI: 10.3390/jcm12247629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 12/01/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
BACKGROUND Recent studies indicate that donor innate immune responses participate in initiating and accelerating innate responses and allorecognition in the recipient. These immune responses negatively affect recipient outcomes and predispose recipients to cardiovascular death (CV death). We hypothesized that a donor cause of death (COD) associated with higher levels of innate immune response would predispose recipients to more adverse outcomes post-transplant, including CV death. METHODS We performed a single-institution retrospective analysis comparing donor characteristics and COD to recipient adverse cardiovascular outcomes. We analyzed the medical records of local adult donors (age 18-64) in a database of donors where adequate data was available. Donor age was available on 706 donors; donor sex was available on 730 donors. We linked donor characteristics (age and sex) and COD to recipient CV death. The data were analyzed using logistic regression, the log-rank test of differences, and Tukey contrast. RESULTS Donor age, female sex, and COD of intracranial hemorrhage were significantly associated with a higher incidence of recipient CV death. CONCLUSIONS In this single institution study, we found that recipients with hearts from donors over 40 years, donors who were female, or donors who died with a COD of intracranial hemorrhage had a higher frequency of CV death. Donor monitoring and potential treatment of innate immune activation may decrease subsequent recipient innate responses and allorecognition stimulated by donor-derived inflammatory signaling, which leads to adverse outcomes.
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Affiliation(s)
- Margo E. Hammond
- Department of Biochemistry, Brigham Young University, Provo, UT 84602, USA;
| | - Charles Zollinger
- Intermountain Donor Services, 6065 S Fashion Blvd, Murray, UT 84107, USA;
| | - Andrija Vidic
- Department of Cardiology, University of Kansas Hospital, 4000 Cambridge St., Kansas City, KS 66160, USA;
| | - Gregory L. Snow
- Department of Statistics, Brigham Young University, Provo, UT 84602, USA;
| | - Joseph Stehlik
- Department of Cardiology, University of Utah Hospital, 50 N Medical Drive, Salt Lake City, UT 84132, USA; (J.S.); (S.D.)
| | - Rami A. Alharethi
- Cardiac Transplant Program, Intermountain Medical Center, 5252 S Intermountain Drive, Salt Lake City, UT 84157, USA; (R.A.A.); (A.G.K.)
| | - Abdallah G. Kfoury
- Cardiac Transplant Program, Intermountain Medical Center, 5252 S Intermountain Drive, Salt Lake City, UT 84157, USA; (R.A.A.); (A.G.K.)
| | - Stavros Drakos
- Department of Cardiology, University of Utah Hospital, 50 N Medical Drive, Salt Lake City, UT 84132, USA; (J.S.); (S.D.)
| | - M Elizabeth H. Hammond
- Department of Cardiology, University of Utah Hospital, 50 N Medical Drive, Salt Lake City, UT 84132, USA; (J.S.); (S.D.)
- Cardiac Transplant Program, Intermountain Medical Center, 5252 S Intermountain Drive, Salt Lake City, UT 84157, USA; (R.A.A.); (A.G.K.)
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3
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Tseng HT, Lin YW, Huang CY, Shih CM, Tsai YT, Liu CW, Tsai CS, Lin FY. Animal Models for Heart Transplantation Focusing on the Pathological Conditions. Biomedicines 2023; 11:biomedicines11051414. [PMID: 37239085 DOI: 10.3390/biomedicines11051414] [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: 03/30/2023] [Revised: 04/29/2023] [Accepted: 05/05/2023] [Indexed: 05/28/2023] Open
Abstract
Cardiac transplant recipients face many complications due to transplant rejection. Scientists must conduct animal experiments to study disease onset mechanisms and develop countermeasures. Therefore, many animal models have been developed for research topics including immunopathology of graft rejection, immunosuppressive therapies, anastomotic techniques, and graft preservation techniques. Small experimental animals include rodents, rabbits, and guinea pigs. They have a high metabolic rate, high reproductive rate, small size for easy handling, and low cost. Additionally, they have genetically modified strains for pathological mechanisms research; however, there is a lacuna, as these research results rarely translate directly to clinical applications. Large animals, including canines, pigs, and non-human primates, have anatomical structures and physiological states that are similar to those of humans; therefore, they are often used to validate the results obtained from small animal studies and directly speculate on the feasibility of applying these results in clinical practice. Before 2023, PubMed Central® at the United States National Institute of Health's National Library of Medicine was used for literature searches on the animal models for heart transplantation focusing on the pathological conditions. Unpublished reports and abstracts from conferences were excluded from this review article. We discussed the applications of small- and large-animal models in heart transplantation-related studies. This review article aimed to provide researchers with a complete understanding of animal models for heart transplantation by focusing on the pathological conditions created by each model.
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Affiliation(s)
- Horng-Ta Tseng
- Taipei Heart Institute, Taipei Medical University, Taipei 11031, Taiwan
- Division of Cardiology and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Departments of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Yi-Wen Lin
- Institute of Oral Biology, National Yang Ming Chiao Tung University (Yangming Campus), Taipei 112304, Taiwan
| | - Chun-Yao Huang
- Taipei Heart Institute, Taipei Medical University, Taipei 11031, Taiwan
- Division of Cardiology and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Departments of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Chun-Ming Shih
- Taipei Heart Institute, Taipei Medical University, Taipei 11031, Taiwan
- Division of Cardiology and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Departments of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Yi-Ting Tsai
- Division of Cardiovascular Surgery, Tri-Service General Hospital, Defense Medical Center, Taipei 11490, Taiwan
| | - Chen-Wei Liu
- Department of Basic Medical Science, College of Medicine, University of Arizona, Phoenix, AZ 85721, USA
| | - Chien-Sung Tsai
- Taipei Heart Institute, Taipei Medical University, Taipei 11031, Taiwan
- Division of Cardiovascular Surgery, Tri-Service General Hospital, Defense Medical Center, Taipei 11490, Taiwan
- Department and Graduate Institute of Pharmacology, National Defense Medical Center, Taipei 11490, Taiwan
| | - Feng-Yen Lin
- Taipei Heart Institute, Taipei Medical University, Taipei 11031, Taiwan
- Division of Cardiology and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Departments of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
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Santarsiero D, Aiello S. The Complement System in Kidney Transplantation. Cells 2023; 12:cells12050791. [PMID: 36899927 PMCID: PMC10001167 DOI: 10.3390/cells12050791] [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: 01/02/2023] [Revised: 02/24/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Kidney transplantation is the therapy of choice for patients who suffer from end-stage renal diseases. Despite improvements in surgical techniques and immunosuppressive treatments, long-term graft survival remains a challenge. A large body of evidence documented that the complement cascade, a part of the innate immune system, plays a crucial role in the deleterious inflammatory reactions that occur during the transplantation process, such as brain or cardiac death of the donor and ischaemia/reperfusion injury. In addition, the complement system also modulates the responses of T cells and B cells to alloantigens, thus playing a crucial role in cellular as well as humoral responses to the allograft, which lead to damage to the transplanted kidney. Since several drugs that are capable of inhibiting complement activation at various stages of the complement cascade are emerging and being developed, we will discuss how these novel therapies could have potential applications in ameliorating outcomes in kidney transplantations by preventing the deleterious effects of ischaemia/reperfusion injury, modulating the adaptive immune response, and treating antibody-mediated rejection.
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5
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The Value of Single-cell Technologies in Solid Organ Transplantation Studies. Transplantation 2022; 106:2325-2337. [PMID: 35876376 DOI: 10.1097/tp.0000000000004237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Single-cell technologies open up new opportunities to explore the behavior of cells at the individual level. For solid organ transplantation, single-cell technologies can provide in-depth insights into the underlying mechanisms of the immunological processes involved in alloimmune responses after transplantation by investigating the role of individual cells in tolerance and rejection. Here, we review the value of single-cell technologies, including cytometry by time-of-flight and single-cell RNA sequencing, in the context of solid organ transplantation research. Various applications of single-cell technologies are addressed, such as the characterization and identification of immune cell subsets involved in rejection or tolerance. In addition, we explore the opportunities for analyzing specific alloreactive T- or B-cell clones by linking phenotype data to T- or B-cell receptor data, and for distinguishing donor- from recipient-derived immune cells. Moreover, we discuss the use of single-cell technologies in biomarker identification and risk stratification, as well as the remaining challenges. Together, this review highlights that single-cell approaches contribute to a better understanding of underlying immunological mechanisms of rejection and tolerance, thereby potentially accelerating the development of new or improved therapies to avoid allograft rejection.
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6
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De Louche CD, Roghanian A. Human inhibitory leukocyte Ig-like receptors: from immunotolerance to immunotherapy. JCI Insight 2022; 7:151553. [PMID: 35076022 PMCID: PMC8855791 DOI: 10.1172/jci.insight.151553] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Howard MC, Nauser CL, Farrar CA, Sacks SH. Complement in ischaemia-reperfusion injury and transplantation. Semin Immunopathol 2021; 43:789-797. [PMID: 34757496 PMCID: PMC8579729 DOI: 10.1007/s00281-021-00896-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 09/22/2021] [Indexed: 01/08/2023]
Abstract
Until recently, the only known condition in which complement could mediate transplant injury was the rare occurrence of antibody-mediated rejection, in which the original concept of antibody immunity against the transplant was supported by complementary proteins present in the serum. This has changed within the last two decades because of evidence that the processes of ischaemia–reperfusion injury followed by T cell–mediated rejection are also critically dependent on components generated by the complement system. We now have a clearer understanding of the complement triggers and effectors that mediate injury, and a detailed map of their local sites of production and activation in the kidney. This is providing helpful guidelines as to how these harmful processes that restrict transplant outcomes can be targeted for therapeutic benefit. Here we review some of the recent advances highlighting relevant therapeutic targets.
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Affiliation(s)
- Mark C Howard
- Peter Gorer Department of Immunobiology, School of Immunology & Microbial Sciences, King's College London, 5thFloor Tower Wing, Guy's Hospital, Great Maze Pond, London, SE1 9RT, UK.
| | - Christopher L Nauser
- Peter Gorer Department of Immunobiology, School of Immunology & Microbial Sciences, King's College London, 5thFloor Tower Wing, Guy's Hospital, Great Maze Pond, London, SE1 9RT, UK
| | - Conrad A Farrar
- Peter Gorer Department of Immunobiology, School of Immunology & Microbial Sciences, King's College London, 5thFloor Tower Wing, Guy's Hospital, Great Maze Pond, London, SE1 9RT, UK
| | - Steven H Sacks
- Peter Gorer Department of Immunobiology, School of Immunology & Microbial Sciences, King's College London, 5thFloor Tower Wing, Guy's Hospital, Great Maze Pond, London, SE1 9RT, UK
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8
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Cunningham KT, Mills KHG. Trained Innate Immunity in Hematopoietic Stem Cell and Solid Organ Transplantation. Transplantation 2021; 105:1666-1676. [PMID: 33982911 DOI: 10.1097/tp.0000000000003673] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Although significant progress has been made to improve short-term survival of transplant patients, long-term acceptance of allografts in solid organ and hematopoietic stem cell (HSC) transplantation is still a significant challenge. Current therapeutics for preventing or treating allograft rejection rely on potent immunosuppressive drugs that primarily target T cells of the adaptive immune response. Promising advances in transplant immunology have highlighted the importance of innate immune responses in allograft acceptance and rejection. Recent studies have demonstrated that innate immune cells are capable of mediating memory-like responses during inflammation, a term known as trained innate immunity. In this process, innate immune cells, such as macrophages and monocytes, undergo metabolic and epigenetic changes in response to a primary stimulus with a pathogen or their products that result in faster and more robust responses to a secondary stimulus. There is also some evidence to suggest that innate immune cells or their progenitors may be more anti-inflammatory after initial stimulation with appropriate agents, such as helminth products. Although this phenomenon has primarily been studied in the context of infection, there is emerging evidence to suggest that it could play a vital role in transplantation rejection and tolerance. Mechanisms of training innate immune cells and their progenitors in the bone marrow are therefore attractive targets for mediating long-term solid organ and HSC transplant tolerance. In this review, we highlight the potential role of proinflammatory and anti-inflammatory mechanisms of trained innate immunity in solid organ and HSC transplantation.
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Affiliation(s)
- Kyle T Cunningham
- Immune Regulation Research Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
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9
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Abstract
IMPORTANCE Clinical decision and immunosuppression dosing in kidney transplantation rely on transplant biopsy tissue histology even though histology has low specificity, sensitivity, and reproducibility for rejection diagnosis. The inclusion of stable allografts in mechanistic and clinical studies is vital to provide a normal, noninjured comparative group for all interrogative studies on understanding allograft injury. OBJECTIVE To refine the definition of a stable allograft as one that is clinically, histologically, and molecularly quiescent using publicly available transcriptomics data. DESIGN, SETTING, AND PARTICIPANTS In this prognostic study, the National Center for Biotechnology Information Gene Expression Omnibus was used to search for microarray gene expression data from kidney transplant tissues, resulting in 38 studies from January 1, 2017, to December 31, 2018. The diagnostic annotations included 510 acute rejection (AR) samples, 1154 histologically stable (hSTA) samples, and 609 normal samples. Raw fluorescence intensity data were downloaded and preprocessed followed by data set merging and batch correction. MAIN OUTCOMES AND MEASURES The primary measure was area under the receiver operating characteristics curve from a set of feature selected genes and cell types for distinguishing AR from normal kidney tissue. RESULTS Within the 28 data sets, the feature selection procedure identified a set of 6 genes (KLF4, CENPJ, KLF2, PPP1R15A, FOSB, TNFAIP3) (area under the curve [AUC], 0.98) and 5 immune cell types (CD4+ T-cell central memory [Tcm], CD4+ T-cell effector memory [Tem], CD8+ Tem, natural killer [NK] cells, and Type 1 T helper [TH1] cells) (AUC, 0.92) that were combined into 1 composite Instability Score (InstaScore) (AUC, 0.99). The InstaScore was applied to the hSTA samples: 626 of 1154 (54%) were found to be immune quiescent and redefined as histologically and molecularly stable (hSTA/mSTA); 528 of 1154 (46%) were found to have molecular evidence of rejection (hSTA/mAR) and should not have been classified as stable allografts. The validation on an independent cohort of 6 months of protocol biopsy samples in December 2019 showed that hSTA/mAR samples had a significant change in graft function (r = 0.52, P < .001) and graft loss at 5-year follow-up (r = 0.17). A drop by 10 mL/min/1.73m2 in estimated glomerular filtration rate was estimated as a threshold in allograft transitioning from hSTA/mSTA to hSTA/mAR. CONCLUSIONS AND RELEVANCE The results of this prognostic study suggest that the InstaScore could provide an important adjunct for comprehensive and highly quantitative phenotyping of protocol kidney transplant biopsy samples and could be integrated into clinical care for accurate estimation of subsequent patient clinical outcomes.
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Affiliation(s)
- Dmitry Rychkov
- Division of Multi-Organ Transplantation, Department of Surgery, University of California, San Francisco
- Bakar Computational Health Sciences Institute, University of California, San Francisco
| | - Swastika Sur
- Division of Multi-Organ Transplantation, Department of Surgery, University of California, San Francisco
| | - Marina Sirota
- Bakar Computational Health Sciences Institute, University of California, San Francisco
- Department of Pediatrics, University of California, San Francisco
| | - Minnie M. Sarwal
- Division of Multi-Organ Transplantation, Department of Surgery, University of California, San Francisco
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10
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Smith TA, Ghergherehchi CL, Mikesh M, Shores JT, Tucker HO, Bittner GD. Polyethylene glycol-fusion repair of sciatic allografts in female rats achieves immunotolerance via attenuated innate and adaptive responses. J Neurosci Res 2020; 98:2468-2495. [PMID: 32931034 DOI: 10.1002/jnr.24720] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 07/31/2020] [Accepted: 08/11/2020] [Indexed: 12/17/2022]
Abstract
Ablation/segmental loss peripheral nerve injuries (PNIs) exhibit poor functional recovery due to slow and inaccurate outgrowth of regenerating axons. Viable peripheral nerve allografts (PNAs) as growth-guide conduits are immunologically rejected and all anucleated donor/host axonal segments undergo Wallerian degeneration. In contrast, we report that ablation-type sciatic PNIs repaired by neurorrhaphy of viable sciatic PNAs and a polyethylene glycol (PEG)-fusion protocol using PEG immediately restored axonal continuity for many axons, reinnervated/maintained their neuromuscular junctions, and prevented much Wallerian degeneration. PEG-fused PNAs permanently restored many sciatic-mediated behaviors within 2-6 weeks. PEG-fused PNAs were not rejected even though host/donors were neither immunosuppressed nor tissue-matched in outbred female Sprague Dawley rats. Innate and adaptive immune responses to PEG-fused sciatic PNAs were analyzed using electron microscopy, immunohistochemistry, and quantitative reverse transcription polymerase chain reaction for morphological features, T cell and macrophage infiltration, major histocompatibility complex (MHC) expression, apoptosis, expression of cytokines, chemokines, and cytotoxic effectors. PEG-fused PNAs exhibited attenuated innate and adaptive immune responses by 14-21 days postoperatively, as evidenced by (a) many axons and cells remaining viable, (b) significantly reduced infiltration of cytotoxic and total T cells and macrophages, (c) significantly reduced expression of inflammatory cytokines, chemokines, and MHC proteins, (d) consistently low apoptotic response. Morphologically and/or biochemically, PEG-fused sciatic PNAs often resembled sciatic autografts or intact sciatic nerves. In brief, PEG-fused PNAs are an unstudied, perhaps unique, example of immune tolerance of viable allograft tissue in a nonimmune-privileged environment and could greatly improve the clinical outcomes for PNIs relative to current protocols.
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Affiliation(s)
- Tyler A Smith
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, USA
| | | | - Michelle Mikesh
- Department of Neuroscience, University of Texas at Austin, Austin, TX, USA
| | - Jaimie T Shores
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Haley O Tucker
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, USA
| | - George D Bittner
- Department of Neuroscience, University of Texas at Austin, Austin, TX, USA
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Jordan SC, Ammerman N, Choi J, Kumar S, Huang E, Toyoda M, Kim I, Wu G, Vo A. Interleukin-6: An Important Mediator of Allograft Injury. Transplantation 2020; 104:2497-2506. [DOI: 10.1097/tp.0000000000003249] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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12
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Nieuwenhuijs-Moeke GJ, Pischke SE, Berger SP, Sanders JSF, Pol RA, Struys MMRF, Ploeg RJ, Leuvenink HGD. Ischemia and Reperfusion Injury in Kidney Transplantation: Relevant Mechanisms in Injury and Repair. J Clin Med 2020; 9:jcm9010253. [PMID: 31963521 PMCID: PMC7019324 DOI: 10.3390/jcm9010253] [Citation(s) in RCA: 140] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/12/2020] [Accepted: 01/13/2020] [Indexed: 02/07/2023] Open
Abstract
Ischemia and reperfusion injury (IRI) is a complex pathophysiological phenomenon, inevitable in kidney transplantation and one of the most important mechanisms for non- or delayed function immediately after transplantation. Long term, it is associated with acute rejection and chronic graft dysfunction due to interstitial fibrosis and tubular atrophy. Recently, more insight has been gained in the underlying molecular pathways and signalling cascades involved, which opens the door to new therapeutic opportunities aiming to reduce IRI and improve graft survival. This review systemically discusses the specific molecular pathways involved in the pathophysiology of IRI and highlights new therapeutic strategies targeting these pathways.
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Affiliation(s)
- Gertrude J. Nieuwenhuijs-Moeke
- Department of Anesthesiology, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands;
- Correspondence: ; Tel.: +31-631623075
| | - Søren E. Pischke
- Clinic for Emergencies and Critical Care, Department of Anesthesiology, Department of Immunology, Oslo University Hospital, 4950 Nydalen, 0424 Oslo, Norway;
| | - Stefan P. Berger
- Department of Nephrology, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands; (S.P.B.); (J.S.F.S.)
| | - Jan Stephan F. Sanders
- Department of Nephrology, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands; (S.P.B.); (J.S.F.S.)
| | - Robert A. Pol
- Department of Surgery, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands; (R.A.P.); (R.J.P.); (H.G.D.L.)
| | - Michel M. R. F. Struys
- Department of Anesthesiology, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands;
- Department of Basic and Applied Medical Sciences, Ghent University, Corneel Heymanslaan 10, 9000 Ghent, Belgium
| | - Rutger J. Ploeg
- Department of Surgery, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands; (R.A.P.); (R.J.P.); (H.G.D.L.)
- Nuffield Department of Surgical Sciences, University of Oxford, Headington, Oxford OX3 9DU, UK
| | - Henri G. D. Leuvenink
- Department of Surgery, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands; (R.A.P.); (R.J.P.); (H.G.D.L.)
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Inhibition of tRNA Gene Transcription by the Immunosuppressant Mycophenolic Acid. Mol Cell Biol 2019; 40:MCB.00294-19. [PMID: 31658995 PMCID: PMC6908259 DOI: 10.1128/mcb.00294-19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 10/21/2019] [Indexed: 12/11/2022] Open
Abstract
Mycophenolic acid (MPA) is the active metabolite of mycophenolate mofetil, a drug that is widely used for immunosuppression in organ transplantation and autoimmune diseases, as well as anticancer chemotherapy. It inhibits IMP dehydrogenase, a rate-limiting enzyme in de novo synthesis of guanidine nucleotides. Mycophenolic acid (MPA) is the active metabolite of mycophenolate mofetil, a drug that is widely used for immunosuppression in organ transplantation and autoimmune diseases, as well as anticancer chemotherapy. It inhibits IMP dehydrogenase, a rate-limiting enzyme in de novo synthesis of guanidine nucleotides. MPA treatment interferes with transcription elongation, resulting in a drastic reduction of pre-rRNA and pre-tRNA synthesis, the disruption of the nucleolus, and consequently cell cycle arrest. Here, we investigated the mechanism whereby MPA inhibits RNA polymerase III (Pol III) activity, in both yeast and mammalian cells. We show that MPA rapidly inhibits Pol III by depleting GTP. Although MPA treatment can activate p53, this is not required for Pol III transcriptional inhibition. The Pol III repressor MAF1 is also not responsible for inhibiting Pol III in response to MPA treatment. We show that upon MPA treatment, the levels of selected Pol III subunits decrease, but this is secondary to transcriptional inhibition. Chromatin immunoprecipitation (ChIP) experiments show that Pol III does not fully dissociate from tRNA genes in yeast treated with MPA, even though there is a sharp decrease in the levels of newly transcribed tRNAs. We propose that in yeast, GTP depletion may lead to Pol III stalling.
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Grafals M, Thurman JM. The Role of Complement in Organ Transplantation. Front Immunol 2019; 10:2380. [PMID: 31636644 PMCID: PMC6788431 DOI: 10.3389/fimmu.2019.02380] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 09/23/2019] [Indexed: 12/17/2022] Open
Abstract
The current immunosuppressive protocols used in transplant recipients have improved short-term outcomes, but long-term allograft failure remains an important clinical problem. Greater understanding of the immunologic mechanisms that cause allograft failure are needed, as well as new treatment strategies for protecting transplanted organs. The complement cascade is an important part of the innate immune system. Studies have shown that complement activation contributes to allograft injury in several clinical settings, including ischemia/reperfusion injury and antibody mediated rejection. Furthermore, the complement system plays critical roles in modulating the responses of T cells and B cells to antigens. Therapeutic complement inhibitors, therefore, may be effective for protecting transplanted organs from several causes of inflammatory injury. Although several anti-complement drugs have shown promise in selected patients, the role of these drugs in transplantation medicine requires further study.
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Affiliation(s)
- Monica Grafals
- Department of Medicine, University of Colorado School of Medicine, Aurora, CO, United States
| | - Joshua M Thurman
- Department of Medicine, University of Colorado School of Medicine, Aurora, CO, United States
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Abstract
Increasing evidence indicates an integral role for the complement system in the deleterious inflammatory reactions that occur during critical phases of the transplantation process, such as brain or cardiac death of the donor, surgical trauma, organ preservation and ischaemia-reperfusion injury, as well as in humoral and cellular immune responses to the allograft. Ischaemia is the most common cause of complement activation in kidney transplantation and in combination with reperfusion is a major cause of inflammation and graft damage. Complement also has a prominent role in antibody-mediated rejection (ABMR) owing to ABO and HLA incompatibility, which leads to devastating damage to the transplanted kidney. Emerging drugs and treatment modalities that inhibit complement activation at various stages in the complement cascade are being developed to ameliorate the damage caused by complement activation in transplantation. These promising new therapies have various potential applications at different stages in the process of transplantation, including inhibiting the destructive effects of ischaemia and/or reperfusion injury, treating ABMR, inducing accommodation and modulating the adaptive immune response.
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Mueller FB, Yang H, Lubetzky M, Verma A, Lee JR, Dadhania DM, Xiang JZ, Salvatore SP, Seshan SV, Sharma VK, Elemento O, Suthanthiran M, Muthukumar T. Landscape of innate immune system transcriptome and acute T cell-mediated rejection of human kidney allografts. JCI Insight 2019; 4:128014. [PMID: 31292297 PMCID: PMC6629252 DOI: 10.1172/jci.insight.128014] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 05/28/2019] [Indexed: 12/22/2022] Open
Abstract
Acute rejection of human allografts has been viewed mostly through the lens of adaptive immunity, and the intragraft landscape of innate immunity genes has not been characterized in an unbiased fashion. We performed RNA sequencing of 34 kidney allograft biopsy specimens from 34 adult recipients; 16 were categorized as Banff acute T cell-mediated rejection (TCMR) and 18 as normal. Computational analysis of intragraft mRNA transcriptome identified significantly higher abundance of mRNA for pattern recognition receptors in TCMR compared with normal biopsies, as well as increased expression of mRNAs for cytokines, chemokines, interferons, and caspases. Intragraft levels of calcineurin mRNA were higher in TCMR biopsies, suggesting underimmunosuppression compared with normal biopsies. Cell-type-enrichment analysis revealed higher abundance of dendritic cells and macrophages in TCMR biopsies. Damage-associated molecular patterns, the endogenous ligands for pattern recognition receptors, as well markers of DNA damage were higher in TCMR. mRNA expression patterns supported increased calcium flux and indices of endoplasmic, cellular oxidative, and mitochondrial stress were higher in TCMR. Expression of mRNAs in major metabolic pathways was decreased in TCMR. Our global and unbiased transcriptome profiling identified heightened expression of innate immune system genes during an episode of TCMR in human kidney allografts.
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Affiliation(s)
| | - Hua Yang
- Division of Nephrology and Hypertension, Department of Medicine
| | - Michelle Lubetzky
- Division of Nephrology and Hypertension, Department of Medicine
- Department of Transplantation Medicine
| | - Akanksha Verma
- Department of Physiology and Biophysics, Caryl and Israel Englander Institute for Precision Medicine, Institute for Computational Biomedicine
| | - John R. Lee
- Division of Nephrology and Hypertension, Department of Medicine
- Department of Transplantation Medicine
| | - Darshana M. Dadhania
- Division of Nephrology and Hypertension, Department of Medicine
- Department of Transplantation Medicine
| | - Jenny Z. Xiang
- Genomics Resources Core Facility, Department of Microbiology and Immunology; and
| | - Steven P. Salvatore
- Division of Renal Pathology, Department of Pathology and Laboratory Medicine, Weill Cornell Medical College/NewYork–Presbyterian Hospital, New York, New York, USA
| | - Surya V. Seshan
- Division of Renal Pathology, Department of Pathology and Laboratory Medicine, Weill Cornell Medical College/NewYork–Presbyterian Hospital, New York, New York, USA
| | - Vijay K. Sharma
- Division of Nephrology and Hypertension, Department of Medicine
| | - Olivier Elemento
- Department of Physiology and Biophysics, Caryl and Israel Englander Institute for Precision Medicine, Institute for Computational Biomedicine
| | - Manikkam Suthanthiran
- Division of Nephrology and Hypertension, Department of Medicine
- Department of Transplantation Medicine
| | - Thangamani Muthukumar
- Division of Nephrology and Hypertension, Department of Medicine
- Department of Transplantation Medicine
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Cells, soluble factors and matrix harmonically play the concert of allograft integration. Knee Surg Sports Traumatol Arthrosc 2019; 27:1717-1725. [PMID: 30291395 DOI: 10.1007/s00167-018-5182-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 09/20/2018] [Indexed: 01/05/2023]
Abstract
Implantation of allograft tissues has massively grown over the last years, especially in the fields related to sports medicine. Beside the fact that often no autograft option exists, autograft related disadvantages as donor-site morbidity and prolonged operative time are drastically reduced with allograft tissues. Despite the well documented clinical success for bone allograft procedures, advances in tissue engineering raised the interest in meniscus, osteochondral and ligament/tendon allografts. Notably, their overall success rates are constantly higher than 80%, making them a valuable treatment option in orthopaedics, especially in knee surgery. Complications reported for allografting procedures are a small risk of disease transmission, immunologic rejection, and decreased biologic incorporation together with nonunion at the graft-host juncture and, rarely, massive allograft resorption. Although allografting is a successful procedure, improved techniques and biological knowledge to limit these pitfalls and maximize graft incorporation are needed. A basic understanding of the biologic processes that affect the donor-host interactions and eventual incorporation and remodelling of various allograft tissues is a fundamental prerequisite for their successful clinical use. Further, the importance of the interaction of immunologic factors with the biologic processes involved in allograft incorporation has yet to be fully dissected. Finally, new tissue engineering techniques and use of adjunctive growth factors, cell based and focused gene therapies may improve the quality and uniformity of clinical outcomes. The aim of this review is to shed light on the biology of meniscus, osteochondral and ligament/tendon allograft incorporation and how collection and storage techniques may affect graft stability and embodiment.Level of evidence V.
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Li L, Chen X, Zhang Y, Li Q, Qi C, Fei X, Zheng F, Gong F, Fang M. Toll-like receptor 2 deficiency promotes the generation of alloreactive Th17 cells after cardiac transplantation in mice. Cell Immunol 2019; 338:9-20. [DOI: 10.1016/j.cellimm.2019.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 02/11/2019] [Accepted: 02/21/2019] [Indexed: 12/11/2022]
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Matz M, Heinrich F, Zhang Q, Lorkowski C, Seelow E, Wu K, Lachmann N, Addo RK, Durek P, Mashreghi MF, Budde K. The regulation of interferon type I pathway-related genes RSAD2 and ETV7 specifically indicates antibody-mediated rejection after kidney transplantation. Clin Transplant 2018; 32:e13429. [PMID: 30341925 DOI: 10.1111/ctr.13429] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/03/2018] [Accepted: 10/12/2018] [Indexed: 01/09/2023]
Abstract
CONTEXT Antibody-mediated rejection (ABMR) after kidney transplantation (KTx) remains the crucial obstacle to successful long-term graft function. The identification of gene signatures involved in ABMR could grant the basis for better prevention and treatment strategies. OBJECTIVE The identification of gene signatures in whole blood cells specific for ABMR after KTx. MATERIALS AND METHODS Total RNA from blood cells of 16 kidney-transplanted patients with ABMR, stable graft function (SGF), and with T-cell-mediated rejection (TCMR) was isolated. Gene expression was determined by high-throughput sequencing followed by validation and analyses of differentially expressed candidates on mRNA level and on protein level in a large patient cohort (n = 185) in patients with SGF, urinary tract infection (UTI), borderline rejection (BL), TCMR, ABMR, and interstitial fibrosis and tubular atrophy. RESULTS From the 570 genes detected, 111 discriminated ABMR from SGF and TCMR. A distinct enrichment of interferon (IFN) type I and type II signature gene set was observed. The expression of candidate genes IFIT1, ETV7, and RSAD2 distinguished ABMR patients from patients with SGF and also TCMR, whereas ETV7 and RSAD2 differentiated ABMR also from BL. CONCLUSION The IFN-inducible genes ETV7 and RSAD2 represent specific biomarkers for ABMR episodes after KTx.
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Affiliation(s)
- Mareen Matz
- Department of Nephrology, Charité University Medicine Berlin, Berlin, Germany
| | - Frederik Heinrich
- Deutsches Rheuma-Forschungszentrum Berlin, A Leibniz Institute(DRFZ), Berlin, Germany
| | - Qiang Zhang
- Department of Nephrology, Charité University Medicine Berlin, Berlin, Germany
| | - Christine Lorkowski
- Department of Nephrology, Charité University Medicine Berlin, Berlin, Germany
| | - Evelyn Seelow
- Department of Nephrology, Charité University Medicine Berlin, Berlin, Germany
| | - Kaiyin Wu
- Department of Pathology, Charité University Medicine Berlin, Berlin, Germany
| | - Nils Lachmann
- Center for Tumor Medicine, H&I Laboratory, Charité University Medicine Berlin, Berlin, Germany
| | - Richard K Addo
- Deutsches Rheuma-Forschungszentrum Berlin, A Leibniz Institute(DRFZ), Berlin, Germany
| | - Pawel Durek
- Deutsches Rheuma-Forschungszentrum Berlin, A Leibniz Institute(DRFZ), Berlin, Germany
| | - Mir-Farzin Mashreghi
- Deutsches Rheuma-Forschungszentrum Berlin, A Leibniz Institute(DRFZ), Berlin, Germany
| | - Klemens Budde
- Department of Nephrology, Charité University Medicine Berlin, Berlin, Germany
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Sarhan M, Land WG, Tonnus W, Hugo CP, Linkermann A. Origin and Consequences of Necroinflammation. Physiol Rev 2018; 98:727-780. [PMID: 29465288 DOI: 10.1152/physrev.00041.2016] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
When cells undergo necrotic cell death in either physiological or pathophysiological settings in vivo, they release highly immunogenic intracellular molecules and organelles into the interstitium and thereby represent the strongest known trigger of the immune system. With our increasing understanding of necrosis as a regulated and genetically determined process (RN, regulated necrosis), necrosis and necroinflammation can be pharmacologically prevented. This review discusses our current knowledge about signaling pathways of necrotic cell death as the origin of necroinflammation. Multiple pathways of RN such as necroptosis, ferroptosis, and pyroptosis have been evolutionary conserved most likely because of their differences in immunogenicity. As the consequence of necrosis, however, all necrotic cells release damage associated molecular patterns (DAMPs) that have been extensively investigated over the last two decades. Analysis of necroinflammation allows characterizing specific signatures for each particular pathway of cell death. While all RN-pathways share the release of DAMPs in general, most of them actively regulate the immune system by the additional expression and/or maturation of either pro- or anti-inflammatory cytokines/chemokines. In addition, DAMPs have been demonstrated to modulate the process of regeneration. For the purpose of better understanding of necroinflammation, we introduce a novel classification of DAMPs in this review to help detect the relative contribution of each RN-pathway to certain physiological and pathophysiological conditions.
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Affiliation(s)
- Maysa Sarhan
- Division of Nephrology and Dialysis, Department of Medicine III, Medical University Vienna , Vienna , Austria ; INSERM UMR_S 1109, Laboratory of Excellence Transplantex, University of Strasbourg , Strasbourg , France ; German Academy of Transplantation Medicine, Munich , Germany ; and Division of Nephrology, Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden , Dresden , Germany
| | - Walter G Land
- Division of Nephrology and Dialysis, Department of Medicine III, Medical University Vienna , Vienna , Austria ; INSERM UMR_S 1109, Laboratory of Excellence Transplantex, University of Strasbourg , Strasbourg , France ; German Academy of Transplantation Medicine, Munich , Germany ; and Division of Nephrology, Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden , Dresden , Germany
| | - Wulf Tonnus
- Division of Nephrology and Dialysis, Department of Medicine III, Medical University Vienna , Vienna , Austria ; INSERM UMR_S 1109, Laboratory of Excellence Transplantex, University of Strasbourg , Strasbourg , France ; German Academy of Transplantation Medicine, Munich , Germany ; and Division of Nephrology, Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden , Dresden , Germany
| | - Christian P Hugo
- Division of Nephrology and Dialysis, Department of Medicine III, Medical University Vienna , Vienna , Austria ; INSERM UMR_S 1109, Laboratory of Excellence Transplantex, University of Strasbourg , Strasbourg , France ; German Academy of Transplantation Medicine, Munich , Germany ; and Division of Nephrology, Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden , Dresden , Germany
| | - Andreas Linkermann
- Division of Nephrology and Dialysis, Department of Medicine III, Medical University Vienna , Vienna , Austria ; INSERM UMR_S 1109, Laboratory of Excellence Transplantex, University of Strasbourg , Strasbourg , France ; German Academy of Transplantation Medicine, Munich , Germany ; and Division of Nephrology, Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden , Dresden , Germany
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He XT, Wang J, Li X, Yin Y, Sun HH, Chen FM. The Critical Role of Cell Homing in Cytotherapeutics and Regenerative Medicine. ADVANCED THERAPEUTICS 2018. [DOI: 10.1002/adtp.201800098] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xiao-Tao He
- State Key Laboratory of Military Stomatology; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
- National Clinical Research Center for Oral Diseases; Department of Periodontology; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
- Shaanxi Engineering Research Center for Dental Materials, and Advanced Manufacture; Biomaterials Unit; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
| | - Jia Wang
- State Key Laboratory of Military Stomatology; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
- Shaanxi Engineering Research Center for Dental Materials, and Advanced Manufacture; Biomaterials Unit; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
| | - Xuan Li
- State Key Laboratory of Military Stomatology; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
- National Clinical Research Center for Oral Diseases; Department of Periodontology; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
- Shaanxi Engineering Research Center for Dental Materials, and Advanced Manufacture; Biomaterials Unit; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
| | - Yuan Yin
- State Key Laboratory of Military Stomatology; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
- Shaanxi Engineering Research Center for Dental Materials, and Advanced Manufacture; Biomaterials Unit; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
| | - Hai-Hua Sun
- National Clinical Research Center for Oral Diseases; Department of Periodontology; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
| | - Fa-Ming Chen
- State Key Laboratory of Military Stomatology; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
- National Clinical Research Center for Oral Diseases; Department of Periodontology; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
- Shaanxi Engineering Research Center for Dental Materials, and Advanced Manufacture; Biomaterials Unit; School of Stomatology; Fourth Military Medical University; 710032 Xi'an P. R. China
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A Synthetic Cross-Species CD200R1 Agonist Suppresses Inflammatory Immune Responses In Vivo. MOLECULAR THERAPY-NUCLEIC ACIDS 2018; 12:350-358. [PMID: 30195773 PMCID: PMC6037911 DOI: 10.1016/j.omtn.2018.05.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Revised: 05/25/2018] [Accepted: 05/26/2018] [Indexed: 01/10/2023]
Abstract
Functional aptamers displaying agonistic or antagonistic properties are showing great promise as modulators of immune responses. Here, we report the development of a polyethylene glycol-modified (PEGylated) DNA aptamer as a cross-species (murine and human) CD200R1 agonist that modulates inflammatory responses in vivo. Specifically, DNA aptamers were discovered by performing independent SELEX searches on recombinant murine and human CD200R1. Aptamer motifs identified by next generation sequencing (NGS) were subsequently compared, leading to the discovery of motifs common to both targets. The CD200R1 DNA aptamer CCS13 displayed the highest agonistic activity toward CD200R1 in terms of suppressing the induction of cytotoxic T-lymphocytes (CTLs) in both human and murine allogeneic-mixed lymphocyte cultures (allo-MLCs). A 20-kDa polyethylene glycol (PEG) chain was covalently attached to the 5′ end of this aptamer, and the resulting conjugate was shown to block inflammatory responses in murine models of skin graft rejection and house-dust-mite-induced allergic airway inflammation. Importantly, this agonistic aptamer does not suppress CTL induction in 5-day allo-MLCs with responder cells derived from CD200R1−/− mice, indicating that its mode of action is directly linked to CD200R1 activation. This study suggests that one can derive agonistic DNA aptamers that can be verified as immuno-modulators in murine models with outcomes potentially translatable to the treatment of human conditions.
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Alelign T, Ahmed MM, Bobosha K, Tadesse Y, Howe R, Petros B. Kidney Transplantation: The Challenge of Human Leukocyte Antigen and Its Therapeutic Strategies. J Immunol Res 2018; 2018:5986740. [PMID: 29693023 PMCID: PMC5859822 DOI: 10.1155/2018/5986740] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/30/2017] [Accepted: 12/03/2017] [Indexed: 12/16/2022] Open
Abstract
Kidney transplantation remains the treatment of choice for end-stage renal failure. When the immune system of the recipient recognizes the transplanted kidney as a foreign object, graft rejection occurs. As part of the host immune defense mechanism, human leukocyte antigen (HLA) is a major challenge for graft rejection in transplantation therapy. The impact of HLA mismatches between the donor and the potential recipient prolongs the time for renal transplantation therapy, tethered to dialysis, latter reduces graft survival, and increases mortality. The formation of pretransplant alloantibodies against HLA class I and II molecules can be sensitized through exposures to blood transfusions, prior transplants, and pregnancy. These preformed HLA antibodies are associated with rejection in kidney transplantation. On the other hand, the development of de novo antibodies may increase the risk for acute and chronic rejections. Allograft rejection results from a complex interplay involving both the innate and the adaptive immune systems. Thus, further insights into the mechanisms of tissue rejection and the risk of HLA sensitization is crucial in developing new therapies that may blunt the immune system against transplanted organs. Therefore, the purpose of this review is to highlight facts about HLA and its sensitization, various mechanisms of allograft rejection, the current immunosuppressive approaches, and the directions for future therapy.
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Affiliation(s)
- Tilahun Alelign
- College of Natural Sciences, Department of Microbial, Cellular and Molecular Biology, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
- Department of Biology, Debre Berhan University, P.O. Box 445, Debre Berhan, Ethiopia
- Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Momina M. Ahmed
- St. Paul's Hospital Millennium Medical College and Addis Ababa University, Addis Ababa, Ethiopia
| | - Kidist Bobosha
- Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Yewondwossen Tadesse
- School of Medicine, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Rawleigh Howe
- Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Beyene Petros
- College of Natural Sciences, Department of Microbial, Cellular and Molecular Biology, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
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Liu JMH, Zhang X, Joe S, Luo X, Shea LD. Evaluation of biomaterial scaffold delivery of IL-33 as a localized immunomodulatory agent to support cell transplantation in adipose tissue. ACTA ACUST UNITED AC 2018; 1:1-12. [PMID: 29869643 DOI: 10.1016/j.regen.2018.01.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Introduction The development of novel immunomodulatory strategies that might decrease the need for systemic immune suppression would greatly enable the utility of cell-based therapies. Cell transplantation on biomaterial scaffolds offers a unique opportunity to engineer a site to locally polarize immunogenic antigen generation. Herein, we investigated the localized delivery of IL-33, which is a novel cytokine that has been shown to have beneficial immunomodulatory effects in certain transplant models as mediating anti-inflammatory properties in the adipose tissue, to determine its feasibility for use as an immunomodulatory agent. Results Localized IL-33 delivery from poly(lactide-co-glycolide) (PLG) scaffolds implanted into the epididymal fat specifically increased the Foxp3+ population of CD4+ T cells in both blank scaffold implants and scaffolds seeded with allogeneic islets. In allogeneic islet transplantation, we found IL-33 delivery results in a local upregulation of graft-protective T cells where 80% of the local CD4+ population is Foxp3+ and overall numbers of graft destructive CD8+ T cells are decreased, resulting in a prolonged graft survival. Interestingly, local IL-33 also delayed islet engraftment by primarily inducing a local upregulation of Th2 cytokines, including IL-4 and IL-5, leading to increased populations of ST2+ Type 2 innate lymphoid cells (ILC2s) and Siglec F+ eosinophils. Conclusions These results suggest that local IL-33 delivery from biomaterial scaffolds can be used to increase Tregs enriched in adipose tissue and reduce graft-destructive T cell populations but may also promote innate cell populations that can delay cell engraftment.
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Affiliation(s)
- Jeffrey M H Liu
- Interdisciplinary Biological Sciences Program, Northwestern University, Evanston, IL, 60208, USA.,Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Xiaomin Zhang
- Department of Surgery, Division of Transplantation, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Shelby Joe
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Xunrong Luo
- Department of Surgery, Division of Transplantation, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.,Center for Kidney Research and Therapeutics, Feinberg Cardiovascular Research Institute, Northwestern University, Chicago, IL, 60611, USA.,Department of Medicine, Division of Nephrology and Hypertension, Northwestern University, Chicago, IL, 60611, USA
| | - Lonnie D Shea
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
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Uehara M, Solhjou Z, Banouni N, Kasinath V, Xiaqun Y, Dai L, Yilmam O, Yilmaz M, Ichimura T, Fiorina P, Martins PN, Ohori S, Guleria I, Maarouf OH, Tullius SG, McGrath MM, Abdi R. Ischemia augments alloimmune injury through IL-6-driven CD4 + alloreactivity. Sci Rep 2018; 8:2461. [PMID: 29410442 PMCID: PMC5802749 DOI: 10.1038/s41598-018-20858-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 01/25/2018] [Indexed: 02/06/2023] Open
Abstract
Ischemia reperfusion injuries (IRI) are unavoidable in solid organ transplantation. IRI augments alloimmunity but the mechanisms involved are poorly understood. Herein, we examined the effect of IRI on antigen specific alloimmunity. We demonstrate that ischemia promotes alloimmune activation, leading to more severe histological features of rejection, and increased CD4+ and CD8+ T cell graft infiltration, with a predominantly CD8+ IFNγ+ infiltrate. This process is dependent on the presence of alloreactive CD4+ T cells, where depletion prevented infiltration of ischemic grafts by CD8+ IFNγ+ T cells. IL-6 is a known driver of ischemia-induced rejection. Herein, depletion of donor antigen-presenting cells reduced ischemia-induced CD8+ IFNγ+ allograft infiltration, and improved allograft outcomes. Following prolonged ischemia, accelerated rejection was observed despite treatment with CTLA4Ig, indicating that T cell costimulatory blockade failed to overcome the immune activating effect of IRI. However, despite severe ischemic injury, treatment with anti-IL-6 and CTLA4Ig blocked IRI-induced alloimmune injury and markedly improved allograft survival. We describe a novel pathway where IRI activates innate immunity, leading to upregulation of antigen specific alloimmunity, resulting in chronic allograft injury. Based on these findings, we describe a clinically relevant treatment strategy to overcome the deleterious effect of IRI, and provide superior long-term allograft outcomes.
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Affiliation(s)
- Mayuko Uehara
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Zhabiz Solhjou
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Naima Banouni
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Vivek Kasinath
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ye Xiaqun
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Li Dai
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Osman Yilmam
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Mine Yilmaz
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Takaharu Ichimura
- Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Paolo Fiorina
- Division of Nephrology, Boston Children Hospital, Harvard Medical School, Boston, MA, USA
| | - Paulo N Martins
- Division of Surgery, University of Massachusetts Medical School, Boston, MA, USA
| | - Shunsuke Ohori
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Indira Guleria
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Omar H Maarouf
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Stefan G Tullius
- Division of Transplant Surgery and Transplantation Surgery Research Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Martina M McGrath
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
| | - Reza Abdi
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
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26
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Abstract
Acute-on-chronic liver failure (ACLF) is characterized by organ failure mediated by acute decompensation of cirrhosis. Recent studies have highlighted the importance of the gut-liver axis (GLS) and its association with ACLF pathogenesis. In this review, we discuss the mechanisms related to the alteration of the GLA and their involvement in ACLF pathogenesis and suggest some possible therapeutic options that could modulate the GLA dysfunction. This knowledge may provide information useful for the design of therapeutic strategies for gut dysbiosis and its complications in ACLF.
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27
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Zhang Q, Chen J, Gao H, Zhang S, Zhao C, Zhou C, Wang C, Li Y, Cai Z, Mou L. Drug repurposing: Ibrutinib exhibits immunosuppressive potential in organ transplantation. Int J Med Sci 2018; 15:1118-1128. [PMID: 30123049 PMCID: PMC6097265 DOI: 10.7150/ijms.24460] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 04/12/2018] [Indexed: 11/05/2022] Open
Abstract
Long-term administration of classic immunosuppressants can induce severe adverse effects. The development of novel immunosuppressants confronts great challenges and opportunities. Ibrutinib, an approved drug for B-cell lineages and chronic graft versus host disease (cGVHD), exhibits immunosuppressive efficacy in autoimmune diseases. Ibrutinib's potential as an immunosuppressant in organ transplantation has not been investigated to date. In a xeno-artery patch model ex vivo, ibrutinib inhibited the proliferation of PBMCs (POD 14-42), mainly CD3+CD4+ and CD3+CD8+ T cells ex vivo. The secretion of cytokines (IL-6, IL-2 and IFN-γ) was suppressed in response to ibrutinib. In allo-skin transplantation models, ibrutinib delayed the rejection of grafted skins. Ibrutinib decreased the amount of T/B cells and lymphocyte infiltration. Altogether, ibrutinib exhibited immunosuppressive potential through cytokine regulation and T cell inhibition ex vivo and in vitro. Repositioning of ibrutinib as an immunosuppressant will greatly facilitate novel immunosuppressant development.
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Affiliation(s)
- Qing Zhang
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen University School of Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Jicheng Chen
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen University School of Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Hanchao Gao
- Shenzhen Longhua District Central Hospital, Shenzhen, China.,Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen University School of Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Song Zhang
- The Department of Anesthesiology, Weifang Medical University, Weifang, China
| | - Chengjiang Zhao
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen University School of Medicine, Shenzhen University Health Science Center, Shenzhen, China.,Shenzhen Longhua District Central Hospital, Shenzhen, China
| | - Cuibing Zhou
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen University School of Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Chengjun Wang
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen University School of Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Yang Li
- School of Information Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Zhiming Cai
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen University School of Medicine, Shenzhen University Health Science Center, Shenzhen, China
| | - Lisha Mou
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center, Institute of Translational Medicine, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen University School of Medicine, Shenzhen University Health Science Center, Shenzhen, China
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28
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Su J, He J, Su Z, Zhou L, Zeng Y, Lai X, Li Y. T cell inhibition by pogostone from Pogostemon cablin (Blanco) Benth: In vitro and in vivo immunosuppressive analysis. Mol Med Rep 2017; 16:4511-4520. [PMID: 28791344 PMCID: PMC5647011 DOI: 10.3892/mmr.2017.7147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 06/09/2017] [Indexed: 12/24/2022] Open
Abstract
Various plant-derived compounds exhibit immunosuppressive activity in pre-clinical investigations, suggesting that they may serve as natural alternatives for the prevention of inflammatory disorders and autoimmune diseases. The aim of the current study was to explore the immunosuppressive potential of pogostone (PO) derived from Pogostemon cablin (Blanco) Benth. Carboxyfluorescein diacetate succinimidyl ester-labeled cell tracking demonstrated that PO (20–80 µM) inhibited Concanavalin A (ConA)-stimulated lymphocyte proliferation, which was mediated by G0/G1 phase arrest and accompanied by significant decreases in the expression of CD69 (early-stage activation marker) and CD25 (mid-stage activation marker) in T cells, as indicated by flow cytometry analysis. Furthermore, the proliferation blocking ability of PO (5–80 µM) was not associated with cytotoxicity in normal lymphocytes or apoptosis in ConA-stimulated lymphocytes. The inflammatory cytokine profile determination using a cytometric beads assay revealed that PO inhibited release of anti-inflammatory interleukin (IL)-10 and pro-inflammatory IL-6 from the stimulated lymphocytes. Furthermore, PO (10, 20 or 40 mg/kg) ameliorated the T-cell mediated delayed type hypersensitivity response in Balb/c mice by reducing leukocyte infiltration and tissue edema, providing a further validation of the direct immunosuppressive activity of PO. Together, the present data suggest that PO would suppress T cell response via a direct non-cytotoxic inactivation at the early stage, accompanied by regulation of the inflammatory cytokine profile, which highlights clinical implications for treatment of immune-based disorders.
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Affiliation(s)
- Jiyan Su
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, Guangdong 510070, P.R. China
| | - Jingjin He
- Cancer Research Institute, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Ziren Su
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, P.R. China
| | - Lian Zhou
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, P.R. China
| | - Yaoying Zeng
- Institute of Tissue Transplantation and Immunology, Jinan University, Guangzhou, Guangdong 523000, P.R. China
| | - Xiaoping Lai
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, P.R. China
| | - Yucui Li
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, P.R. China
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29
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Mahr B, Wekerle T. Murine models of transplantation tolerance through mixed chimerism: advances and roadblocks. Clin Exp Immunol 2017; 189:181-189. [PMID: 28395110 PMCID: PMC5508343 DOI: 10.1111/cei.12976] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2017] [Indexed: 02/06/2023] Open
Abstract
Organ transplantation is the treatment of choice for patients with end-stage organ failure, but chronic immunosuppression is taking its toll in terms of morbidity and poor efficacy in preventing late graft loss. Therefore, a drug-free state would be desirable where the recipient permanently accepts a donor organ while remaining otherwise fully immunologically competent. Mouse studies unveiled mixed chimerism as an effective approach to induce such donor-specific tolerance deliberately and laid the foundation for a series of clinical pilot trials. Nevertheless, its widespread clinical implementation is currently prevented by cytotoxic conditioning and limited efficacy. Therefore, the use of mouse studies remains an indispensable tool for the development of novel concepts with potential for translation and for the delineation of underlying tolerance mechanisms. Recent innovations developed in mice include the use of pro-apoptotic drugs or regulatory T cell (Treg ) transfer for promoting bone marrow engraftment in the absence of myelosuppression and new insight gained in the role of innate immunity and the interplay between deletion and regulation in maintaining tolerance in chimeras. Here, we review these and other recent advances in murine studies inducing transplantation tolerance through mixed chimerism and discuss both the advances and roadblocks of this approach.
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Affiliation(s)
- B. Mahr
- Section of Transplantation Immunology, Department of SurgeryMedical University of ViennaViennaAustria
| | - T. Wekerle
- Section of Transplantation Immunology, Department of SurgeryMedical University of ViennaViennaAustria
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30
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Lian Y, Gao C, Wu Y, Xia J, Leng Y, Liu Y, Zhu M, Chen J, Qi Z. Suppression of Delayed Xenograft Rejection by Resveratrol in a Hamster-to-Rat Cardiac Transplantation Model. Transplant Proc 2017; 49:1483-1491. [DOI: 10.1016/j.transproceed.2017.03.091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 03/09/2017] [Accepted: 03/30/2017] [Indexed: 12/13/2022]
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31
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Pinoli M, Marino F, Cosentino M. Dopaminergic Regulation of Innate Immunity: a Review. J Neuroimmune Pharmacol 2017; 12:602-623. [PMID: 28578466 DOI: 10.1007/s11481-017-9749-2] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 04/28/2017] [Indexed: 12/13/2022]
Abstract
Dopamine (DA) is a neurotransmitter in the central nervous system as well as in peripheral tissues. Emerging evidence however points to DA also as a key transmitter between the nervous system and the immune system as well as a mediator produced and released by immune cells themselves. Dopaminergic pathways have received so far extensive attention in the adaptive branch of the immune system, where they play a role in health and disease such as multiple sclerosis, rheumatoid arthritis, cancer, and Parkinson's disease. Comparatively little is known about DA and the innate immune response, although DA may affect innate immune system cells such as dendritic cells, macrophages, microglia, and neutrophils. The present review aims at providing a complete and exhaustive summary of currently available evidence about DA and innate immunity, and to become a reference for anyone potentially interested in the fields of immunology, neurosciences and pharmacology. A wide array of dopaminergic drugs is used in therapeutics for non-immune indications, such as Parkinson's disease, hyperprolactinemia, shock, hypertension, with a usually favorable therapeutic index, and they might be relatively easily repurposed for immune-mediated disease, thus leading to innovative treatments at low price, with benefit for patients as well as for the healthcare systems.
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Affiliation(s)
- Monica Pinoli
- Center of Research in Medical Pharmacology, University of Insubria, Via Ottorino Rossi n. 9, 21100, Varese, VA, Italy
| | - Franca Marino
- Center of Research in Medical Pharmacology, University of Insubria, Via Ottorino Rossi n. 9, 21100, Varese, VA, Italy.
| | - Marco Cosentino
- Center of Research in Medical Pharmacology, University of Insubria, Via Ottorino Rossi n. 9, 21100, Varese, VA, Italy
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32
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Marinaki S, Skalioti C, Boletis J. Glomerular Diseases and Renal Transplantation: Pathogenic Pathways and Evolution of Therapeutic Interventions. Transplant Proc 2017; 49:243-252. [PMID: 28219579 DOI: 10.1016/j.transproceed.2016.11.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 11/16/2016] [Indexed: 11/19/2022]
Abstract
Glomerular diseases and renal transplantation are the main fields of nephrology in which the immune system plays a prevalent role. Glomerular diseases have traditionally been attributed to auto-immune conditions, whereas allograft rejection has been considered an allo-immune response. However, common immunopathologic mechanisms that include Toll-like receptors, complement and B-cell activation, as well as genetic and infectious factors appear to be involved in the pathogenesis of both entities. Novel therapeutic regimens directed against specific targets of the immune system show promising results in glomerulopathies as well as in renal transplantation.
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Affiliation(s)
- S Marinaki
- Nephrology Department and Renal Transplantation Unit, Laiko Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - C Skalioti
- Nephrology Department and Renal Transplantation Unit, Laiko Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - J Boletis
- Nephrology Department and Renal Transplantation Unit, Laiko Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
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33
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Ye Q, Liu L, Wu Y, Yeh F, Li W, Tseng L, Ho C. Intralipid ® attenuates acute cardiac allograft rejection in relation to promoting CD4 + CD25 + Foxp3 + regulatory T-cells and inhibiting toll-like receptor 4 expression. TRANSPLANTATION REPORTS 2017. [DOI: 10.1016/j.tpr.2017.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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34
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Shaheen FAM, Shalabi M, Zain A, Hasanain M, Al Sayyari A. Immediately Functioning Grafts from Brain-Dead Donors Treated with Extracorporeal Membrane Oxygenation. EXP CLIN TRANSPLANT 2017; 17:404-407. [PMID: 28229804 DOI: 10.6002/ect.2016.0369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A brain-dead donor experienced repeated cardiac arrests followed by severe hypotension requiring multiple vasoactive agents. These events were associated with severe lactic acidosis and dysregulated kidney function in the donor. A 10-hour treatment with extracorporeal membranous oxygenation was instituted, which was able to hemodynamically stabilize the donor. This treatment protocol resulted in the procurement of 2 viable kidney grafts transplanted into 2 recipients, who had immediate kidney graft function and excellent serum creatinine levels upon hospital discharge. These results are all the more significant considering that both cases involved long cold ischemia times, and one of the recipients had diabetes and was receiving his second kidney graft.
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35
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MicroRNA-20a negatively regulates expression of NLRP3-inflammasome by targeting TXNIP in adjuvant-induced arthritis fibroblast-like synoviocytes. Joint Bone Spine 2016; 83:695-700. [DOI: 10.1016/j.jbspin.2015.10.007] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 10/28/2015] [Indexed: 12/11/2022]
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36
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Land WG, Agostinis P, Gasser S, Garg AD, Linkermann A. Transplantation and Damage-Associated Molecular Patterns (DAMPs). Am J Transplant 2016; 16:3338-3361. [PMID: 27421829 DOI: 10.1111/ajt.13963] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 06/24/2016] [Accepted: 07/10/2016] [Indexed: 01/25/2023]
Abstract
Upon solid organ transplantation and during cancer immunotherapy, cellular stress responses result in the release of damage-associated molecular patterns (DAMPs). The various cellular stresses have been characterized in detail over the last decades, but a unifying classification based on clinically important aspects is lacking. Here, we provide an in-depth review of the most recent literature along with a unifying concept of the danger/injury model, suggest a classification of DAMPs, and review the recently elaborated mechanisms that result in the emission of such factors. We further point out the differences in DAMP responses including the release following a heat shock pattern, endoplasmic reticulum stress, DNA damage-mediated DAMP release, and discuss the diverse pathways of regulated necrosis in this respect. The understanding of various forms of DAMPs and the consequences of their different release patterns are prerequisite to associate serum markers of cellular stresses with clinical outcomes.
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Affiliation(s)
- W G Land
- German Academy of Transplantation Medicine, Munich, Germany.,Laboratoire d'ImmunoRhumatologie Moléculaire, INSERM UMR_S1109, Plateforme GENOMAX, Faculté de Médecine, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France.,LabexTRANSPLANTEX, Faculté de Médecine, Université de Strasbourg, Strasbourg, France
| | - P Agostinis
- Cell Death Research and Therapy (CDRT) Lab, Department of Cellular and Molecular Medicine, KU Leuven, University of Leuven, Leuven, Belgium
| | - S Gasser
- Immunology Programme and Department of Microbiology and Immunology, Centre for Life Sciences, National University of Singapore, Singapore, Singapore
| | - A D Garg
- Cell Death Research and Therapy (CDRT) Lab, Department of Cellular and Molecular Medicine, KU Leuven, University of Leuven, Leuven, Belgium
| | - A Linkermann
- Cluster of Excellence EXC306, Inflammation at Interfaces, Schleswig-Holstein, Germany.,Clinic for Nephrology and Hypertension, Christian-Albrechts-University, Kiel, Germany
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37
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Sun L, Zhi L, Shakoor S, Liao K, Wang D. microRNAs Involved in the Control of Innate Immunity in Candida Infected Caenorhabditis elegans. Sci Rep 2016; 6:36036. [PMID: 27796366 PMCID: PMC5086856 DOI: 10.1038/srep36036] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 10/10/2016] [Indexed: 12/15/2022] Open
Abstract
The role of microRNAs (miRNAs) in regulating innate immune response to Candida albicans infection in Caenorhabditis elegans is still largely unclear. Using small RNA SOLiD deep sequencing technique, we profiled the miRNAs that were dysregulated by C. albicans infection. We identified 16 miRNAs that were up-regulated and 4 miRNAs that were down-regulated in nematodes infected with C. albicans. Bioinformatics analysis implied that these dysregulated miRNAs may be involved in the control of many important biological processes. Using available mutants, we observed that mir-251 and mir-252 loss-of-function mutants were resistant to C. albicans infection, whereas mir-360 mutants were hypersensitive to C. albicans infection. The expression pattern of antimicrobial genes suggested that mir-251, mir-252, and mir-360 played crucial roles in regulating the innate immune response to C. albicans infection. Fungal burden might be closely associated with altered lifespan and innate immune response in mir-251, mir-252, and mir-360 mutants. Moreover, mir-251 and mir-252 might function downstream of p38 mitogen activated protein kinase (MAPK) or IGF-1/insulin-like pathway to regulate the innate immune response to C. albicans infection. Our results provide an important molecular basis for further elucidating how miRNA-mRNA networks may control the innate immune response to C. albicans infection.
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Affiliation(s)
- Lingmei Sun
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Lingtong Zhi
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Shumaila Shakoor
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Kai Liao
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Dayong Wang
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
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38
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Borges TJ, Lang BJ, Lopes RL, Bonorino C. Modulation of Alloimmunity by Heat Shock Proteins. Front Immunol 2016; 7:303. [PMID: 27555846 PMCID: PMC4977877 DOI: 10.3389/fimmu.2016.00303] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 07/27/2016] [Indexed: 01/08/2023] Open
Abstract
The immunological mechanisms that evolved for host defense against pathogens and injury are also responsible for transplant rejection. Host rejection of foreign tissue was originally thought to be mediated mainly by T cell recognition of foreign MHC alleles. Management of solid organ transplant rejection has thus focused mainly on inhibition of T cell function and matching MHC alleles between donor and host. Recently, however, it has been demonstrated that the magnitude of the initial innate immune responses upon transplantation has a decisive impact on rejection. The exact mechanisms underlying this phenomenon have yet to be characterized. Ischemic cell death and inflammation that occur upon transplantation are synonymous with extracellular release of various heat shock proteins (Hsps), many of which have been shown to have immune-modulatory properties. Here, we review the impact of Hsps upon alloimmunity and discuss the potential use of Hsps as accessory agents to improve solid organ transplant outcomes.
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Affiliation(s)
- Thiago J Borges
- Faculdade de Biociências e Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul , Porto Alegre, Rio Grande do Sul , Brazil
| | - Benjamin J Lang
- Department of Radiation Oncology, Center for Life Sciences, Beth Israel Deaconess Medical Center, Harvard Medical School , Boston, MA , USA
| | - Rafael L Lopes
- Faculdade de Biociências e Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul , Porto Alegre, Rio Grande do Sul , Brazil
| | - Cristina Bonorino
- Faculdade de Biociências e Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul , Porto Alegre, Rio Grande do Sul , Brazil
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39
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Shakoor S, Sun L, Wang D. Multi-walled carbon nanotubes enhanced fungal colonization and suppressed innate immune response to fungal infection in nematodes. Toxicol Res (Camb) 2016; 5:492-499. [PMID: 30090363 DOI: 10.1039/c5tx00373c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 12/30/2015] [Indexed: 11/21/2022] Open
Abstract
The underlying molecular mechanisms for multi-walled carbon nanotube (MWCNT)-induced in vivo toxicity on innate immunity are still largely unclear. Considering the potential of Caenorhabditis elegans for the study of innate immune response of animals, we employed this in vivo assay system to investigate the effects of MWCNTs on innate immune response of animals and the underlying mechanisms. Pre-exposure to MWCNTs at concentrations more than 100 μg L-1 enhanced the adverse effect of fungal infection in reducing lifespan. With regard to the underlying cellular mechanisms, we found that MWCNT pre-exposure enhanced colony formation of Candida albicans in the body of nematodes, and suppressed innate immune response of nematodes by decreasing expression levels of some antimicrobial genes. With regard to the underlying molecular mechanisms, we found that MWCNTs decreased expression levels of pmk-1, sek-1, and nsy-1 genes encoding the p38 mitogen activated protein kinase (MAPK) signaling pathway, and inhibited translational expression of PMK-1::GFP in the intestine and phosphorylation of PMK-1. Epistasis assays showed that MWCNTs required the involvement of the p38 MAPK signaling pathway mediated by a NSY-1-SEK-1-PMK-1 cascade to enhance the toxicity of fungal infection, increase fungal colony formation, and suppress innate immune response. Thus, our results suggest that MWCNTs may possess immunoinhibitory effects by affecting the functions of the p38 MAPK signaling pathway. Our study also provides meaningful insights into the role of innate immune system of hosts against the toxicity of environmental toxicants.
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Affiliation(s)
- Shumaila Shakoor
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School , Southeast University , Nanjing 210009 , China .
| | - Lingmei Sun
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School , Southeast University , Nanjing 210009 , China .
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School , Southeast University , Nanjing 210009 , China .
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40
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Akkiraju H, Nohe A. Role of Chondrocytes in Cartilage Formation, Progression of Osteoarthritis and Cartilage Regeneration. J Dev Biol 2015; 3:177-192. [PMID: 27347486 PMCID: PMC4916494 DOI: 10.3390/jdb3040177] [Citation(s) in RCA: 243] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Articular cartilage (AC) covers the diarthrodial joints and is responsible for the mechanical distribution of loads across the joints. The majority of its structure and function is controlled by chondrocytes that regulate Extracellular Matrix (ECM) turnover and maintain tissue homeostasis. Imbalance in their function leads to degenerative diseases like Osteoarthritis (OA). OA is characterized by cartilage degradation, osteophyte formation and stiffening of joints. Cartilage degeneration is a consequence of chondrocyte hypertrophy along with the expression of proteolytic enzymes. Matrix Metalloproteinases (MMPs) and A Disintegrin and Metalloproteinase with Thrombospondin Motifs (ADAMTS) are an example of these enzymes that degrade the ECM. Signaling cascades involved in limb patterning and cartilage repair play a role in OA progression. However, the regulation of these remains to be elucidated. Further the role of stem cells and mature chondrocytes in OA progression is unclear. The progress in cell based therapies that utilize Mesenchymal Stem Cell (MSC) infusion for cartilage repair may lead to new therapeutics in the long term. However, many questions are unanswered such as the efficacy of MSCs usage in therapy. This review focuses on the role of chondrocytes in cartilage formation and the progression of OA. Moreover, it summarizes possible alternative therapeutic approaches using MSC infusion for cartilage restoration.
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Affiliation(s)
| | - Anja Nohe
- Author to whom correspondence should be addressed; ; Tel.: +1-302-831-2959; Fax: +1-302-831-2281
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41
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Scanzano A, Cosentino M. Adrenergic regulation of innate immunity: a review. Front Pharmacol 2015; 6:171. [PMID: 26321956 PMCID: PMC4534859 DOI: 10.3389/fphar.2015.00171] [Citation(s) in RCA: 219] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 07/31/2015] [Indexed: 12/24/2022] Open
Abstract
The sympathetic nervous system has a major role in the brain-immune cross-talk, but few information exist on the sympathoadrenergic regulation of innate immune system. The aim of this review is to summarize available knowledge regarding the sympathetic modulation of the innate immune response, providing a rational background for the possible repurposing of adrenergic drugs as immunomodulating agents. The cells of immune system express adrenoceptors (AR), which represent the target for noradrenaline and adrenaline. In human neutrophils, adrenaline and noradrenaline inhibit migration, CD11b/CD18 expression, and oxidative metabolism, possibly through β-AR, although the role of α1- and α2-AR requires further investigation. Natural Killer express β-AR, which are usually inhibitory. Monocytes express β-AR and their activation is usually antiinflammatory. On murine Dentritic cells (DC), β-AR mediate sympathetic influence on DC-T cells interactions. In human DC β2-AR may affect Th1/2 differentiation of CD4+ T cells. In microglia and in astrocytes, β2-AR dysregulation may contribute to neuroinflammation in autoimmune and neurodegenerative disease. In conclusion, extensive evidence supports a critical role for adrenergic mechanisms in the regulation of innate immunity, in peripheral tissues as well as in the CNS. Sympathoadrenergic pathways in the innate immune system may represent novel antiinflammatory and immunomodulating targets with significant therapeutic potential.
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Affiliation(s)
- Angela Scanzano
- Center for Research in Medical Pharmacology, University of Insubria Varese, Italy
| | - Marco Cosentino
- Center for Research in Medical Pharmacology, University of Insubria Varese, Italy
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Su JY, Luo X, Zhang XJ, Deng XL, Su ZR, Zhou L, Li SS, Dai Z, Xu Y, Lai XP. Immunosuppressive activity of pogostone on T cells: Blocking proliferation via S phase arrest. Int Immunopharmacol 2015; 26:328-37. [PMID: 25912345 DOI: 10.1016/j.intimp.2015.04.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 04/09/2015] [Accepted: 04/10/2015] [Indexed: 11/30/2022]
Abstract
Pogostone (PO) is one of the major chemical constituents of the essential oil of Pogostemon cablin (Blanco) Benth. In the present study, the effect of PO on T cell responsiveness was investigated to explore its potential in immunosuppression by a Concanavalin A (ConA)-stimulation model using splenocytes isolated from C57BL/6 mice. Cytotoxicity by PO on normal splenocytes was evaluated by MTS assays. Characteristics of apoptosis, proliferation, and cell cycle were analyzed by flow cytometry. Related expressions of cyclins and cyclin-dependent kinases (CDKs) were also determined by flow cytometry. Inflammatory cytokine profiling was performed emplying cytometric beads assays (CBA). Moreover, the T cell-mediated delayed Type hepersensity (DTH) model was applied to evaluate the immunosuppressive activity of PO. Neither viability reduction in normal splenocytes nor apoptosis in ConA-stimulated splenocytes was observed under PO treatments. Meanwhile, PO remarkably reduced the total population of ConA-stimulated T cell, blocked T cell proliferation induced by Con A, and inhibited the production of IFN-γ and IL-10. This blockade of stimulated T cell proliferation by PO was likely attributed to down-regulation of cyclin E, cyclin B and CDK1 and the subsequent S-phase arrest. Additionally, PO could inhibit the DTH reaction by alleviating ear swelling and inflammatory infiltrations in the DNCB-challenged ear. Taken together, PO exhibited an immunosuppressive property by directly blocking T cell proliferation as well as altering inflammatory cytokine profile, suggesting that PO may have clinical implications for treating autoimmune diseases and other immune-based disorders.
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Affiliation(s)
- Ji-Yan Su
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China; School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Xia Luo
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Xiao-Jun Zhang
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Xiang-Liang Deng
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Zi-Ren Su
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China; Dongguan Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Dongguan, Guangdong, 523000, China
| | - Lian Zhou
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Shan-Shan Li
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Zhenhua Dai
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Yang Xu
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China.
| | - Xiao-Ping Lai
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China; Dongguan Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Dongguan, Guangdong, 523000, China.
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Abstract
PURPOSE OF REVIEW Much research in transplantation focuses on treatments for rejection and induction of tolerance. Recent evidence has shown that initial inflammation induced by innate immune effectors after transplantation has a key role in modulating adaptive immune responses that cause organ rejection. Here, we describe the role of the innate immune system, particularly the complement activation pathways, and how they influence adaptive immune responses post-transplantation and current strategies, which are under development to block these innate pathways. RECENT FINDINGS Anaphylatoxins and their respective receptors are proving to be important in T-cell-mediated immunity and make attractive targets for therapies designed to promote tolerance in solid organ transplantation. Additionally, regulators of complement activation are currently being tested in clinical trials, with improvements in drug delivery. SUMMARY Preventing ischaemia-reperfusion injury in transplanted organs significantly reduces immune activation and promotes graft survival. Research into the mechanisms of complement activation in both native organ ischaemia and transplantation models detail emerging roles for complement intermediates that can serve as targets for intervention, with the aim of reducing early post-transplant inflammation, reducing the intensity of immunosuppressive regimens, leading to prolonged graft survival.
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Biglarnia AR, Ekdahl KN, Nilsson B. Complement Interception Across Humoral Incompatibility in Solid Organ Transplantation: A Clinical Perspective. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 865:211-33. [PMID: 26306452 DOI: 10.1007/978-3-319-18603-0_13] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The humoral barrier in transplant biology is the result of preformed donor-specific antibodies (DSAs), directed either against human leukocyte antigens (HLA) or non-HLA antigens such as blood group (ABO) molecules. The term "sensitization" applies to patients carrying these antibodies. Transplantation is widely accepted as a life-saving opportunity for patients with terminal end-organ disease. However, in sensitized patients, transplant outcome is hampered by antibody-mediated rejection (AMR) as a consequence of DSA exposure. Furthermore, sensitized patients have limited access to "matched" organs from the both living and deceased donor pool.Considering the crucial role of the complement system in the pathophysiology of AMR and the availability of complement intervention therapeutics, there is a growing interest in complement-targeting strategies. This review highlights the emerging importance of monitoring and modulation of the complement system in the context of enabling transplantation across humoral incompatibility in sensitized recipients with preformed anti-HLA or natural anti-ABO antibodies. It also discusses the significance of the complement system in the induction of accommodation and further emphasizes current and future perspectives of novel complement therapeutics.
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Affiliation(s)
- Ali-Reza Biglarnia
- Surgical Science, Department of Transplantation, Uppsala University Hospital, Uppsala University, Uppsala, Sweden,
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Lane SW, Williams DA, Watt FM. Modulating the stem cell niche for tissue regeneration. Nat Biotechnol 2014; 32:795-803. [PMID: 25093887 PMCID: PMC4422171 DOI: 10.1038/nbt.2978] [Citation(s) in RCA: 383] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 07/06/2014] [Indexed: 02/06/2023]
Abstract
The field of regenerative medicine holds considerable promise for treating diseases that are currently intractable. Although many researchers are adopting the strategy of cell transplantation for tissue repair, an alternative approach to therapy is to manipulate the stem cell microenvironment, or niche, to facilitate repair by endogenous stem cells. The niche is highly dynamic, with multiple opportunities for intervention. These include administration of small molecules, biologics or biomaterials that target specific aspects of the niche, such as cell-cell and cell-extracellular matrix interactions, to stimulate expansion or differentiation of stem cells, or to cause reversion of differentiated cells to stem cells. Nevertheless, there are several challenges in targeting the niche therapeutically, not least that of achieving specificity of delivery and responses. We envisage that successful treatments in regenerative medicine will involve different combinations of factors to target stem cells and niche cells, applied at different times to effect recovery according to the dynamics of stem cell-niche interactions.
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Affiliation(s)
- Steven W Lane
- Division of Immunology, QIMR Berghofer Medical Research Institute, Royal Brisbane Hospital, Herston, Queensland, Australia
| | - David A Williams
- 1] Division of Hematology/Oncology, Boston Children's Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, USA. [2] Harvard Stem Cell Institute, Boston, Massachusetts, USA
| | - Fiona M Watt
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Great Maze Pond, London, UK
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Skert C, Fogli M, Garrafa E, Perucca S, Fiorentini S, Cancelli V, Turra A, Ribolla R, Filì C, Malagola M, Bergonzi C, Cattina F, Bernardi S, Caruso A, Di Palma A, Russo D. A specific Toll-like receptor profile on T lymphocytes and values of monocytes correlate with bacterial, fungal, and cytomegalovirus infections in the early period of allogeneic stem cell transplantation. Transpl Infect Dis 2014; 16:697-712. [DOI: 10.1111/tid.12264] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 04/10/2014] [Accepted: 04/21/2014] [Indexed: 01/30/2023]
Affiliation(s)
- C. Skert
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - M. Fogli
- Section of Microbiology; Department of Experimental and Applied Medicine; University of Brescia; Brescia Italy
| | - E. Garrafa
- Section of Microbiology; Department of Experimental and Applied Medicine; University of Brescia; Brescia Italy
| | - S. Perucca
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - S. Fiorentini
- Section of Microbiology; Department of Experimental and Applied Medicine; University of Brescia; Brescia Italy
| | - V. Cancelli
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - A. Turra
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - R. Ribolla
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - C. Filì
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - M. Malagola
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - C. Bergonzi
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - F. Cattina
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - S. Bernardi
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - A. Caruso
- Section of Microbiology; Department of Experimental and Applied Medicine; University of Brescia; Brescia Italy
| | - A. Di Palma
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
| | - D. Russo
- Hematology; Stem Cell Transplantation Unit; University of Brescia; Brescia Italy
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