1
|
Franco-Acevedo A, Pathoulas CL, Murphy PA, Valenzuela NM. The Transplant Bellwether: Endothelial Cells in Antibody-Mediated Rejection. J Immunol 2023; 211:1276-1285. [PMID: 37844279 PMCID: PMC10593495 DOI: 10.4049/jimmunol.2300363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 08/22/2023] [Indexed: 10/18/2023]
Abstract
Ab-mediated rejection of organ transplants remains a stubborn, frequent problem affecting patient quality of life, graft function, and grant survival, and for which few efficacious therapies currently exist. Although the field has gained considerable knowledge over the last two decades on how anti-HLA Abs cause acute tissue injury and promote inflammation, there has been a gap in linking these effects with the chronic inflammation, vascular remodeling, and persistent alloimmunity that leads to deterioration of graft function over the long term. This review will discuss new data emerging over the last 5 y that provide clues into how ongoing Ab-endothelial cell interactions may shape vascular fate and propagate alloimmunity in organ transplants.
Collapse
Affiliation(s)
- Adriana Franco-Acevedo
- Department of Pathology and Laboratory Medicine, University of California, Los Angeles, Los Angeles, CA
| | | | - Patrick A Murphy
- Center for Vascular Biology, University of Connecticut Medical School, Farmington, CT
| | - Nicole M Valenzuela
- Department of Pathology and Laboratory Medicine, University of California, Los Angeles, Los Angeles, CA
| |
Collapse
|
2
|
Shi QS, Li DH, Wu CY, Liu DZ, Hu J, Cui YL, Zhao N, Chen L, Askar M. Effects of serum from mismatched patients with solid organ transplantation on the activation of microvascular cultures isolated from adipose tissues. Transpl Immunol 2021; 69:101462. [PMID: 34508853 DOI: 10.1016/j.trim.2021.101462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/26/2021] [Accepted: 09/01/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Aggregating the human leukocyte antigen (HLA) Class I antigens on the endothelial membrane has been known to elicit an activation, an underlying mechanism of chronic rejection in organ transplant recipients. The current study aims at examining the endothelial responses using HLA typed microvascular cultures from human adipose tissues upon exposure to the serum that contain corresponding antibodies collected from mismatched transplant recipients. METHODS We have successfully cultured 30 microvascular cultures and typed their HLAs. They are functionally competent to respond to inflammatory TNF-α stimulation and the aggregating monoclonal antibody against HLA Class I. The post-transplantation serum was collected either from the recipients with pathologically diagnosed chronic rejection or from the recipients without rejection. We determined their activation either by double-staining the endothelial cells in crude cultures with flow cytometry or by quantifying cytokine releases in purified endothelial cells using ELISA. RESULTS Under our current protocol, adipose tissue cultures are functionally intact in regard to its responses to TNF-alpha and anti-HLA Class I antibody. We observed that the post-transplantation serum with rejection contained the pathogenic antibodies and led to proinflammatory activation, as demonstrated by not only increased CD54+/CD31+ and CD106+/CD31+ cell counts but also inflammatory cytokine releases including MCP-1, IL-8 and RANTES. CONCLUSION This methodological study provides the feasibility of examining the pathogenicity of the alloantibodies in mis-transplant serum. Potentially, the endothelial activation elicited as a result of exposure can be used as an alternative readout for chronic rejection. SIGNIFICANCE We prototype an ex vivo model that enables us to examine whether allogenic antibodies from the recipient can functionally activate microvascular endothelial cells from the donor adipose tissues. This system can be further developed as crossmatch using cellular responses as readouts for chronic rejection for post-transplant surveillance.
Collapse
Affiliation(s)
- Qiang Sebastian Shi
- Minnie & Max T. Voelcker Laboratory, Tianjin International Joint Academy of Biomedicine, S1515 Room, 220 Dongting Road, TEDA, Tianjin, China; Minnie & Max T. Voelcker Laboratory LLC, 1120 Piedmont Lane, Richardson, TX 75080, USA.
| | - Dai-Hong Li
- Transplant Unit, Department of Blood Bank, Tianjin First Central Hospital, 24 Fukang Road, Nankai District, Tianjin, China
| | - Cheng-Yu Wu
- Transplant Immunology Laboratory, Central Texas Baylor Scott & White Health, 2401 South 31st Street, Temple, TX 76508, United States of America.
| | - Da-Zhen Liu
- Department of Urology, General Hospital, Tianjin Medical University, 154 Anshan Street, Heping District, Tianjin, China
| | - Jun Hu
- Department of Colorectal Cancer Surgery, Tianjin Medical University Cancer Institute and Hospital, West Huanhu Road, Hexi District, Tianjin 300060, China.
| | - Yun-Long Cui
- Department of Colorectal Cancer Surgery, Tianjin Medical University Cancer Institute and Hospital, West Huanhu Road, Hexi District, Tianjin 300060, China
| | - Na Zhao
- Minnie & Max T. Voelcker Laboratory, Tianjin International Joint Academy of Biomedicine, S1515 Room, 220 Dongting Road, TEDA, Tianjin, China; Minnie & Max T. Voelcker Laboratory LLC, 1120 Piedmont Lane, Richardson, TX 75080, USA
| | - Li Chen
- Transplant Unit, Department of Blood Bank, Tianjin First Central Hospital, 24 Fukang Road, Nankai District, Tianjin, China; Minnie & Max T. Voelcker Laboratory LLC, 1120 Piedmont Lane, Richardson, TX 75080, USA
| | - Medhat Askar
- Transplant Immunology, Baylor University Medical Center, 3500 Gaston Ave, 4th Floor of the Y Wing, RM# L-0470, Dallas, TX 75246, United States of America.
| |
Collapse
|
3
|
Madyaningrana K, Vijayan V, Nikolin C, Aljabri A, Tumpara S, Korenbaum E, Shah H, Stankov M, Fuchs H, Janciauskiene S, Immenschuh S. Alpha1-antitrypsin counteracts heme-induced endothelial cell inflammatory activation, autophagy dysfunction and death. Redox Biol 2021; 46:102060. [PMID: 34246063 PMCID: PMC8274343 DOI: 10.1016/j.redox.2021.102060] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 06/27/2021] [Indexed: 11/04/2022] Open
Abstract
Free heme toxicity in the vascular endothelium is critical for the pathogenesis of hemolytic disorders including sickle cell disease. In the current study, it is demonstrated that human alpha1-antitrypsin (A1AT), a serine protease inhibitor with high binding-affinity for heme, rescues endothelial cell (EC) injury caused by free heme. A1AT provided endothelial protection against free heme toxicity via a pathway that differs from human serum albumin and hemopexin, two prototypical heme-binding proteins. A1AT inhibited heme-mediated pro-inflammatory activation and death of ECs, but did not affect the increase in intracellular heme levels and up-regulation of the heme-inducible enzyme heme oxygenase-1. Moreover, A1AT reduced heme-mediated generation of mitochondrial reactive oxygen species. Extracellular free heme led to an increased up-take of A1AT by ECs, which was detected in lysosomes and was found to reduce heme-dependent alkalization of these organelles. Finally, A1AT was able to restore heme-dependent dysfunctional autophagy in ECs. Taken together, our findings show that A1AT rescues ECs from free heme-mediated pro-inflammatory activation, cell death and dysfunctional autophagy. Hence, A1AT therapy may be useful in the treatment of hemolytic disorders such as sickle cell disease.
Collapse
Affiliation(s)
- Kukuh Madyaningrana
- Institute of Transfusion Medicine and Transplant Engineering, Hannover Medical School, Hannover, Germany; Faculty of Biotechnology, Universitas Kristen Duta Wacana, Yogyakarta, Indonesia
| | - Vijith Vijayan
- Institute of Transfusion Medicine and Transplant Engineering, Hannover Medical School, Hannover, Germany
| | - Christoph Nikolin
- Institute of Transfusion Medicine and Transplant Engineering, Hannover Medical School, Hannover, Germany
| | - Abid Aljabri
- Institute of Transfusion Medicine and Transplant Engineering, Hannover Medical School, Hannover, Germany
| | - Srinu Tumpara
- Department of Pulmonology, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover Medical School, Hannover, Germany
| | - Elena Korenbaum
- Institute for Biophysical Chemistry Hannover Medical School, Hannover, Germany
| | - Harshit Shah
- Institute for Pathology, Hannover Medical School, Hannover, Germany
| | - Metodi Stankov
- Department for Clinical Immunology and Rheumatology, Hannover Medical School, Hannover, Germany
| | - Heiko Fuchs
- Institute of Experimental Ophthalmology, Hannover Medical School, Hannover, Germany
| | - Sabina Janciauskiene
- Department of Pulmonology, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover Medical School, Hannover, Germany
| | - Stephan Immenschuh
- Institute of Transfusion Medicine and Transplant Engineering, Hannover Medical School, Hannover, Germany.
| |
Collapse
|
4
|
Clotet-Freixas S, McEvoy CM, Batruch I, Pastrello C, Kotlyar M, Van JAD, Arambewela M, Boshart A, Farkona S, Niu Y, Li Y, Famure O, Bozovic A, Kulasingam V, Chen P, Kim SJ, Chan E, Moshkelgosha S, Rahman SA, Das J, Martinu T, Juvet S, Jurisica I, Chruscinski A, John R, Konvalinka A. Extracellular Matrix Injury of Kidney Allografts in Antibody-Mediated Rejection: A Proteomics Study. J Am Soc Nephrol 2020; 31:2705-2724. [PMID: 32900843 DOI: 10.1681/asn.2020030286] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 07/21/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Antibody-mediated rejection (AMR) accounts for >50% of kidney allograft loss. Donor-specific antibodies (DSA) against HLA and non-HLA antigens in the glomeruli and the tubulointerstitium cause AMR while inflammatory cytokines such as TNFα trigger graft injury. The mechanisms governing cell-specific injury in AMR remain unclear. METHODS Unbiased proteomic analysis of laser-captured and microdissected glomeruli and tubulointerstitium was performed on 30 for-cause kidney biopsy specimens with early AMR, acute cellular rejection (ACR), or acute tubular necrosis (ATN). RESULTS A total of 107 of 2026 glomerular and 112 of 2399 tubulointerstitial proteins was significantly differentially expressed in AMR versus ACR; 112 of 2026 glomerular and 181 of 2399 tubulointerstitial proteins were significantly dysregulated in AMR versus ATN (P<0.05). Basement membrane and extracellular matrix (ECM) proteins were significantly decreased in both AMR compartments. Glomerular and tubulointerstitial laminin subunit γ-1 (LAMC1) expression decreased in AMR, as did glomerular nephrin (NPHS1) and receptor-type tyrosine-phosphatase O (PTPRO). The proteomic analysis revealed upregulated galectin-1, which is an immunomodulatory protein linked to the ECM, in AMR glomeruli. Anti-HLA class I antibodies significantly increased cathepsin-V (CTSV) expression and galectin-1 expression and secretion in human glomerular endothelial cells. CTSV had been predicted to cleave ECM proteins in the AMR glomeruli. Glutathione S-transferase ω-1, an ECM-modifying enzyme, was significantly increased in the AMR tubulointerstitium and in TNFα-treated proximal tubular epithelial cells. CONCLUSIONS Basement membranes are often remodeled in chronic AMR. Proteomic analysis performed on laser-captured and microdissected glomeruli and tubulointerstitium identified early ECM remodeling, which may represent a new therapeutic opportunity.
Collapse
Affiliation(s)
- Sergi Clotet-Freixas
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Caitriona M McEvoy
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.,Division of Nephrology, Department of Medicine, University Health Network, Toronto, Ontario, Canada
| | - Ihor Batruch
- Department of Laboratory Medicine and Pathobiology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Chiara Pastrello
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Max Kotlyar
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Julie Anh Dung Van
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Madhurangi Arambewela
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Alex Boshart
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Sofia Farkona
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Yun Niu
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Yanhong Li
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Olusegun Famure
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Andrea Bozovic
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Vathany Kulasingam
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Peixuen Chen
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada
| | - S Joseph Kim
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.,Division of Nephrology, Department of Medicine, University Health Network, Toronto, Ontario, Canada
| | - Emilie Chan
- Division of Nephrology, Department of Medicine, University Health Network, Toronto, Ontario, Canada
| | - Sajad Moshkelgosha
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.,Division of Respirology, Toronto Lung Transplant Program, University Health Network, Toronto, Ontario, Canada
| | - Syed Ashiqur Rahman
- Center for Systems Immunology, Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.,Center for Systems Immunology, Department of Computational and Systems Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Jishnu Das
- Center for Systems Immunology, Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.,Center for Systems Immunology, Department of Computational and Systems Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Tereza Martinu
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.,Division of Respirology, Toronto Lung Transplant Program, University Health Network, Toronto, Ontario, Canada.,Soham and Shaila Ajmera Family Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Stephen Juvet
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.,Division of Respirology, Toronto Lung Transplant Program, University Health Network, Toronto, Ontario, Canada.,Soham and Shaila Ajmera Family Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Igor Jurisica
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.,Department of Computer Science, University of Toronto, Toronto, Ontario, Canada.,Institute of Neuroimmunology, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Andrzej Chruscinski
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.,Soham and Shaila Ajmera Family Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Rohan John
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Ana Konvalinka
- Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada .,Division of Nephrology, Department of Medicine, University Health Network, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Soham and Shaila Ajmera Family Transplant Centre, University Health Network, Toronto, Ontario, Canada
| |
Collapse
|
5
|
Kummer L, Zaradzki M, Vijayan V, Arif R, Weigand MA, Immenschuh S, Wagner AH, Larmann J. Vascular Signaling in Allogenic Solid Organ Transplantation - The Role of Endothelial Cells. Front Physiol 2020; 11:443. [PMID: 32457653 PMCID: PMC7227440 DOI: 10.3389/fphys.2020.00443] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 04/09/2020] [Indexed: 12/12/2022] Open
Abstract
Graft rejection remains the major obstacle after vascularized solid organ transplantation. Endothelial cells, which form the interface between the transplanted graft and the host’s immunity, are the first target for host immune cells. During acute cellular rejection endothelial cells are directly attacked by HLA I and II-recognizing NK cells, macrophages, and T cells, and activation of the complement system leads to endothelial cell lysis. The established forms of immunosuppressive therapy provide effective treatment options, but the treatment of chronic rejection of solid organs remains challenging. Chronic rejection is mainly based on production of donor-specific antibodies that induce endothelial cell activation—a condition which phenotypically resembles chronic inflammation. Activated endothelial cells produce chemokines, and expression of adhesion molecules increases. Due to this pro-inflammatory microenvironment, leukocytes are recruited and transmigrate from the bloodstream across the endothelial monolayer into the vessel wall. This mononuclear infiltrate is a hallmark of transplant vasculopathy. Furthermore, expression profiles of different cytokines serve as clinical markers for the patient’s outcome. Besides their effects on immune cells, activated endothelial cells support the migration and proliferation of vascular smooth muscle cells. In turn, muscle cell recruitment leads to neointima formation followed by reduction in organ perfusion and eventually results in tissue injury. Activation of endothelial cells involves antibody ligation to the surface of endothelial cells. Subsequently, intracellular signaling pathways are initiated. These signaling cascades may serve as targets to prevent or treat adverse effects in antibody-activated endothelial cells. Preventive or therapeutic strategies for chronic rejection can be investigated in sophisticated mouse models of transplant vasculopathy, mimicking interactions between immune cells and endothelium.
Collapse
Affiliation(s)
- Laura Kummer
- Department of Anesthesiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Marcin Zaradzki
- Institute of Cardiac Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Vijith Vijayan
- Institute for Transfusion Medicine, Hannover Medical School, Hanover, Germany
| | - Rawa Arif
- Institute of Cardiac Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Markus A Weigand
- Department of Anesthesiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Stephan Immenschuh
- Institute for Transfusion Medicine, Hannover Medical School, Hanover, Germany
| | - Andreas H Wagner
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Jan Larmann
- Department of Anesthesiology, University Hospital Heidelberg, Heidelberg, Germany
| |
Collapse
|
6
|
Aljabri A, Vijayan V, Stankov M, Nikolin C, Figueiredo C, Blasczyk R, Becker JU, Linkermann A, Immenschuh S. HLA class II antibodies induce necrotic cell death in human endothelial cells via a lysosomal membrane permeabilization-mediated pathway. Cell Death Dis 2019; 10:235. [PMID: 30850581 PMCID: PMC6408495 DOI: 10.1038/s41419-019-1319-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 11/30/2018] [Accepted: 12/06/2018] [Indexed: 12/16/2022]
Abstract
Antibody-mediated rejection (AMR) is the major cause of allograft loss after solid organ transplantation. Circulating donor-specific antibodies against human leukocyte antigen (HLA), in particular HLA class II antibodies are critical for the pathogenesis of AMR via interactions with endothelial cells (ECs). To investigate the effects of HLA class II antibody ligation to the graft endothelium, a model of HLA-DR antibody-dependent stimulation was utilized in primary human ECs. Antibody ligation of HLA class II molecules in interferon-γ-treated ECs caused necrotic cell death without complement via a pathway that was independent of apoptosis and necroptosis. HLA-DR-mediated cell death was blocked by specific neutralization of antibody ligation with recombinant HLA class II protein and by lentiviral knockdown of HLA-DR in ECs. Importantly, HLA class II-mediated cytotoxicity was also induced by relevant native allele-specific antibodies from human allosera. Necrosis of ECs in response to HLA-DR ligation was mediated via hyperactivation of lysosomes, lysosomal membrane permeabilization (LMP), and release of cathepsins. Notably, LMP was caused by reorganization of the actin cytoskeleton. This was indicated by the finding that LMP and actin stress fiber formation by HLA-DR antibodies were both downregulated by the actin polymerization inhibitor cytochalasin D and inhibition of Rho GTPases, respectively. Finally, HLA-DR-dependent actin stress fiber formation and LMP led to mitochondrial stress, which was revealed by decreased mitochondrial membrane potential and generation of reactive oxygen species in ECs. Taken together, ligation of HLA class II antibodies to ECs induces necrotic cell death independent of apoptosis and necroptosis via a LMP-mediated pathway. These findings may enable novel therapeutic approaches for the treatment of AMR in solid organ transplantation.
Collapse
Affiliation(s)
- Abid Aljabri
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany.,King Saud Medical City, Riyadh, Saudi Arabia
| | - Vijith Vijayan
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
| | - Metodi Stankov
- Department for Clinical Immunology and Rheumatology, Hannover Medical School, Hannover, Germany
| | - Christoph Nikolin
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
| | | | - Rainer Blasczyk
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
| | | | - Andreas Linkermann
- Department of Internal Medicine III, Division of Nephrology, University Carl Gustav Carus, Dresden, Germany
| | - Stephan Immenschuh
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany.
| |
Collapse
|
7
|
Qin Y, Sun B, Zhang F, Wang Y, Shen B, Liu Y, Guo Y, Fan Y, Qiu J. Sox7 is involved in antibody-dependent endothelial cell activation and renal allograft injury via the Jagged1-Notch1 pathway. Exp Cell Res 2019; 375:20-27. [PMID: 30639059 DOI: 10.1016/j.yexcr.2019.01.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 11/28/2018] [Accepted: 01/08/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND Antibody-mediated rejection (AMR) can cause graft loss and reduces long-term graft survival after kidney transplantation. Human leukocyte antigen (HLA) and/or non-HLA antibodies play a key role in the pathogenesis of AMR by targeting the allograft epithelium via complement activation and complement-independent mechanisms. However, the precise mechanisms of AMR remain unclear and treatment is still limited. METHODS In this study, we investigated the role of the endothelial-associated transcription factor Sox7 in AMR, using the anti-HLA antibody W6/32, shRNA-mediated Sox7 knockdown, and by manipulating the Notch pathway. We used an in vitro human kidney glomerular endothelial cells (HKGECs) model and an in vivo MHC-mismatched kidney transplantation model. RESULTS Sox7 expression was upregulated and the Jagged1-Notch1 pathway was activated in HKGECs after W6/32 activation. W6/32 antibodies increased the expression of adhesion molecules (VCAM-1, ICAM-1), inflammatory cytokines (IL-6, TNF-α), and chemokines (CXCL8, CXCL10), and Sox7 knockdown and inhibition of the Notch pathway by DAPT significantly reduced these effects. Jagged1 overexpression rescued the inhibitory effects of Sox7 knockdown. In addition, Sox7 knockdown attenuated acute allograft kidney injury in mice and reduced the expression of adhesion molecules and Jagged1-Notch1 signaling after transplantation. CONCLUSIONS Our findings suggest that Sox7 plays an important role in mediating HLA I antibody-dependent endothelial cell activation and acute kidney allograft rejection via the Jagged1-Notch1 pathway. Manipulating Sox7 in donor organs may represent a useful treatment for AMR in solid organ transplantation.
Collapse
Affiliation(s)
- Yan Qin
- Department of Kidney Transplantation & Urology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Bo Sun
- Shanghai Center for Drug Evaluation & Inspection, Shanghai 201203, China
| | - Fang Zhang
- Department of Kidney Transplantation & Urology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Yong Wang
- Department of Kidney Transplantation & Urology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Bing Shen
- Department of Kidney Transplantation & Urology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Yong Liu
- Department of Kidney Transplantation & Urology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Yifeng Guo
- Department of Kidney Transplantation & Urology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Yu Fan
- Department of Kidney Transplantation & Urology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Jianxin Qiu
- Department of Kidney Transplantation & Urology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China.
| |
Collapse
|