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Liu J, Zheng B, Cui Q, Zhu Y, Chu L, Geng Z, Mao Y, Wan L, Cao X, Xiong Q, Guo F, Yang DC, Hsu S, Chen C, Yan X. Single-Cell Spatial Transcriptomics Unveils Platelet-Fueled Cycling Macrophages for Kidney Fibrosis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308505. [PMID: 38838052 PMCID: PMC11304276 DOI: 10.1002/advs.202308505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 04/14/2024] [Indexed: 06/07/2024]
Abstract
With the increasing incidence of kidney diseases, there is an urgent need to develop therapeutic strategies to combat post-injury fibrosis. Immune cells, including platelets, play a pivotal role in this repair process, primarily through their released cytokines. However, the specific role of platelets in kidney injury and subsequent repair remains underexplored. Here, the detrimental role of platelets in renal recovery following ischemia/reperfusion injury and its contribution to acute kidney injury to chronic kidney disease transition is aimed to investigated. In this study, it is shown that depleting platelets accelerates injury resolution and significantly reduces fibrosis. Employing advanced single-cell and spatial transcriptomic techniques, macrophages as the primary mediators modulated by platelet signals is identified. A novel subset of macrophages, termed "cycling M2", which exhibit an M2 phenotype combined with enhanced proliferative activity is uncovered. This subset emerges in the injured kidney during the resolution phase and is modulated by platelet-derived thrombospondin 1 (THBS1) signaling, acquiring profibrotic characteristics. Conversely, targeted inhibition of THBS1 markedly downregulates the cycling M2 macrophage, thereby mitigating fibrotic progression. Overall, this findings highlight the adverse role of platelet THBS1-boosted cycling M2 macrophages in renal injury repair and suggest platelet THBS1 as a promising therapeutic target for alleviating inflammation and kidney fibrosis.
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Affiliation(s)
- Jun Liu
- Pediatric Institute of Soochow UniversityChildren's Hospital of Soochow UniversitySoochow UniversitySuzhou215025China
| | - Bo Zheng
- State Key Laboratory of Reproductive Medicine and Offspring HealthThe Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhou Municipal HospitalGusu School of Nanjing Medical UniversitySuzhou215002China
| | - Qingya Cui
- National Clinical Research Center for Hematologic DiseasesJiangsu Institute of HematologyThe First Affiliated Hospital of Soochow UniversitySuzhou215006China
| | - Yu Zhu
- Pediatric Institute of Soochow UniversityChildren's Hospital of Soochow UniversitySoochow UniversitySuzhou215025China
| | - Likai Chu
- Pediatric Institute of Soochow UniversityChildren's Hospital of Soochow UniversitySoochow UniversitySuzhou215025China
| | - Zhi Geng
- Pediatric Institute of Soochow UniversityChildren's Hospital of Soochow UniversitySoochow UniversitySuzhou215025China
| | - Yiming Mao
- Department of Thoracic SurgerySuzhou Kowloon HospitalShanghai Jiao Tong University School of MedicineSuzhou215028China
| | - Lin Wan
- Pediatric Institute of Soochow UniversityChildren's Hospital of Soochow UniversitySoochow UniversitySuzhou215025China
| | - Xu Cao
- Pediatric Institute of Soochow UniversityChildren's Hospital of Soochow UniversitySoochow UniversitySuzhou215025China
| | - Qianwei Xiong
- Pediatric Institute of Soochow UniversityChildren's Hospital of Soochow UniversitySoochow UniversitySuzhou215025China
| | - Fujia Guo
- Department of MicrobiologyImmunology & Molecular GeneticsUniversity of CaliforniaLos AngelesCA90095USA
| | - David C Yang
- Department of Internal MedicineDivision of NephrologyUniversity of CaliforniaDavisCA95616USA
| | - Ssu‐Wei Hsu
- Department of Internal MedicineDivision of NephrologyUniversity of CaliforniaDavisCA95616USA
| | - Ching‐Hsien Chen
- Department of Internal MedicineDivision of NephrologyUniversity of CaliforniaDavisCA95616USA
- Department of Internal MedicineDivision of Pulmonary and Critical Care MedicineUniversity of California DavisDavisCA95616USA
| | - Xiangming Yan
- Pediatric Institute of Soochow UniversityChildren's Hospital of Soochow UniversitySoochow UniversitySuzhou215025China
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Polara R, Ganesan R, Pitson SM, Robinson N. Cell autonomous functions of CD47 in regulating cellular plasticity and metabolic plasticity. Cell Death Differ 2024:10.1038/s41418-024-01347-w. [PMID: 39039207 DOI: 10.1038/s41418-024-01347-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 07/09/2024] [Accepted: 07/11/2024] [Indexed: 07/24/2024] Open
Abstract
CD47 is a ubiquitously expressed cell surface receptor, which is widely known for preventing macrophage-mediated phagocytosis by interacting with signal regulatory protein α (SIRPα) on the surface of macrophages. In addition to its role in phagocytosis, emerging studies have reported numerous noncanonical functions of CD47 that include regulation of various cellular processes such as proliferation, migration, apoptosis, differentiation, stress responses, and metabolism. Despite lacking an extensive cytoplasmic signaling domain, CD47 binds to several cytoplasmic proteins, particularly upon engaging with its secreted matricellular ligand, thrombospondin 1. Indeed, the regulatory functions of CD47 are greatly influenced by its interacting partners. These interactions are often cell- and context-specific, adding a further level of complexity. This review addresses the downstream cell-intrinsic signaling pathways regulated by CD47 in various cell types and environments. Some of the key pathways modulated by this receptor include the PI3K/AKT, MAPK/ERK, and nitric oxide signaling pathways, as well as those implicated in glucose, lipid, and mitochondrial metabolism. These pathways play vital roles in maintaining tissue homeostasis, highlighting the importance of understanding the phagocytosis-independent functions of CD47. Given that CD47 expression is dysregulated in a variety of cancers, improving our understanding of the cell-intrinsic signals regulated by this molecule will help advance the development of CD47-targeted therapies.
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Affiliation(s)
- Ruhi Polara
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
| | - Raja Ganesan
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
- Institute for Molecular Immunology, CECAD Research Center, University Hospital Cologne, Cologne, Germany
| | - Stuart M Pitson
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, SA, Australia
- School of Biological Sciences, The University of Adelaide, Adelaide, SA, Australia
| | - Nirmal Robinson
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia.
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, SA, Australia.
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3
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Fan Y, Dong S, Xia Y, Yang X, Lei Q, Xu F, Liang D, Liang S, Zhang M, Yang F, Jing Y, Li L, Zhu X, Bao H, Chen Z, Zeng C. Role of TSP-1 and its receptor ITGB3 in the renal tubulointerstitial injury of focal segmental glomerulosclerosis. J Biol Chem 2024; 300:107516. [PMID: 38960036 PMCID: PMC11339032 DOI: 10.1016/j.jbc.2024.107516] [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: 02/20/2024] [Revised: 05/17/2024] [Accepted: 06/02/2024] [Indexed: 07/05/2024] Open
Abstract
Focal segmental glomerulosclerosis (FSGS), a common cause of primary glomerulonephritis, has a poor prognosis and is pathologically featured by tubulointerstitial injury. Thrombospondin-1 (TSP-1) is an extracellular matrix protein that acts in combination with different receptors in the kidney. Here, we analyzed the tubular expression of TSP-1 and its receptor integrin β3 (ITGB3) in FSGS. Previously the renal interstitial chip analysis of FSGS patients with tubular interstitial injury showed that the expression of TSP-1 and ITGB3 were upregulated. We found that the expression of TSP-1 and ITGB3 increased in the tubular cells of FSGS patients. The plasma level of TSP-1 increased and was correlated to the degree of tubulointerstitial lesions in FSGS patients. TSP-1/ITGB3 signaling induced renal tubular injury in HK-2 cells exposure to bovine serum albumin and the adriamycin (ADR)-induced nephropathy model. THBS1 KO ameliorated tubular injury and renal fibrosis in ADR-treated mice. THBS1 knockdown decreased the expression of KIM-1 and caspase 3 in the HK-2 cells treated with bovine serum albumin, while THBS1 overexpression could induce tubular injury. In vivo, we identified cyclo-RGDfK as an agent to block the binding of TSP-1 to ITGB3. Cyclo-RGDfK treatment could alleviate ADR-induced renal tubular injury and interstitial fibrosis in mice. Moreover, TSP-1 and ITGB3 were colocalized in tubular cells of FSGS patients and ADR-treated mice. Taken together, our data showed that TSP-1/ITGB3 signaling contributed to the development of renal tubulointerstitial injury in FSGS, potentially identifying a new therapeutic target for FSGS.
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Affiliation(s)
- Yun Fan
- National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing Medical University, Nanjing, China; the Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi People's Hospital, Wuxi Medical Center, Nanjing Medical University, Wuxi, China
| | - Shihui Dong
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Yuanyuan Xia
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Xue Yang
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Qunjuan Lei
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China; Shenzhen Hospital, Southern Medical University, Shenzhen, China
| | - Feng Xu
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Dandan Liang
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Shaoshan Liang
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Mingchao Zhang
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Fan Yang
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Yan Jing
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Lijuan Li
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Xiaodong Zhu
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Hao Bao
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Zhaohong Chen
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Caihong Zeng
- National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing Medical University, Nanjing, China; National Clinical Research Center for Kidney Diseases, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
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4
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Yamani F, Cianfarini C, Batlle D. Delayed Graft Function and the Renin-angiotensin System. Transplantation 2024; 108:1308-1318. [PMID: 38361243 PMCID: PMC11136607 DOI: 10.1097/tp.0000000000004934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Delayed graft function (DGF) is a form of acute kidney injury (AKI) and a common complication following kidney transplantation. It adversely influences patient outcomes increases the financial burden of transplantation, and currently, no specific treatments are available. In developing this form of AKI, activation of the renin-angiotensin system (RAS) has been proposed to play an important role. In this review, we discuss the role of RAS activation and its contribution to the pathophysiology of DGF following the different stages of the transplantation process, from procurement and ischemia to transplantation into the recipient and including data from experimental animal models. Deceased kidney donors, whether during cardiac or brain death, may experience activation of the RAS. That may be continued or further potentiated during procurement and organ preservation. Additional evidence suggests that during implantation of the kidney graft and reperfusion in the recipient, the RAS is activated and may likely remain activated, extrapolating from other forms of AKI where RAS overactivity is well documented. Of particular interest in this setting is the status of angiotensin-converting enzyme 2, a key RAS enzyme essential for the metabolism of angiotensin II and abundantly present in the apical border of the proximal tubules, which is the site of predominant injury in AKI and DGF. Interventions aimed at safely downregulating the RAS using suitable shorter forms of angiotensin-converting enzyme 2 could be a way to offer protection against DGF.
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Affiliation(s)
- Fatmah Yamani
- Division of Nephrology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Cosimo Cianfarini
- Division of Nephrology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Daniel Batlle
- Division of Nephrology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
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5
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Julovi SM, Trinh K, Robertson H, Xu C, Minhas N, Viswanathan S, Patrick E, Horowitz JD, Meijles DN, Rogers NM. Thrombospondin-1 Drives Cardiac Remodeling in Chronic Kidney Disease. JACC Basic Transl Sci 2024; 9:607-627. [PMID: 38984053 PMCID: PMC11228122 DOI: 10.1016/j.jacbts.2024.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/29/2024] [Accepted: 01/29/2024] [Indexed: 07/11/2024]
Abstract
Patients with chronic kidney disease (CKD) face a high risk of cardiovascular disease. Previous studies reported that endogenous thrombospondin 1 (TSP1) involves right ventricular remodeling and dysfunction. Here we show that a murine model of CKD increased myocardial TSP1 expression and produced left ventricular hypertrophy, fibrosis, and dysfunction. TSP1 knockout mice were protected from these features. In vitro, indoxyl sulfate is driving deleterious changes in cardiomyocyte through the TSP1. In patients with CKD, TSP1 and aryl hydrocarbon receptor were both differentially expressed in the myocardium. Our findings summon large clinical studies to confirm the translational role of TSP1 in patients with CKD.
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Affiliation(s)
- Sohel M Julovi
- Kidney Injury Group, Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
| | - Katie Trinh
- Kidney Injury Group, Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Harry Robertson
- Kidney Injury Group, Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
- Sydney Precision Data Science Centre, University of Sydney, New South Wales, Australia
| | - Cuicui Xu
- Kidney Injury Group, Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Nikita Minhas
- Kidney Injury Group, Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Seethalakshmi Viswanathan
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
- Tissue Pathology and Diagnostic Oncology, Institute of Clinical Pathology and Medical Research, Westmead Hospital, Westmead, New South Wales, Australia
| | - Ellis Patrick
- Kidney Injury Group, Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
- Sydney Precision Data Science Centre, University of Sydney, New South Wales, Australia
- School of Mathematics, University of Sydney, New South Wales, Australia
- Laboratory of Data Discovery for Health Limited (D24H), Science Park, Hong Kong Special Administrative Region, China
| | - John D Horowitz
- Molecular and Clinical Sciences Research Institute, St George's University of London, London, United Kingdom
- Cardiovascular Pathophysiology and Therapeutics Research Group, Basil Hetzel Institute, Woodville, South Australia, Australia
- Department of Medicine, The University of Adelaide, Adelaide, South Australia, Australia
| | - Daniel N Meijles
- Molecular and Clinical Sciences Research Institute, St George's University of London, London, United Kingdom
| | - Natasha M Rogers
- Kidney Injury Group, Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
- Renal and Transplantation Unit, Westmead Hospital, New South Wales, Australia
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6
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Isenberg JS, Montero E. Tolerating CD47. Clin Transl Med 2024; 14:e1584. [PMID: 38362603 PMCID: PMC10870051 DOI: 10.1002/ctm2.1584] [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: 11/19/2023] [Revised: 01/22/2024] [Accepted: 01/30/2024] [Indexed: 02/17/2024] Open
Abstract
Cluster of differentiation 47 (CD47) occupies the outer membrane of human cells, where it binds to soluble and cell surface receptors on the same and other cells, sculpting their topography and resulting in a pleiotropic receptor-multiligand interaction network. It is a focus of drug development to temper and accentuate CD47-driven immune cell liaisons, although consideration of on-target CD47 effects remain neglected. And yet, a late clinical trial of a CD47-blocking antibody was discontinued, existent trials were restrained, and development of CD47-targeting agents halted by some pharmaceutical companies. At this point, if CD47 can be exploited for clinical advantage remains to be determined. Herein an airing is made of the seemingly conflicting actions of CD47 that reflect its position as a junction connecting receptors and signalling pathways that impact numerous human cell types. Prospects of CD47 boosting and blocking are considered along with potential therapeutic implications for autoimmune diseases and cancer.
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Affiliation(s)
- Jeffrey S. Isenberg
- Department of Diabetes Complications & MetabolismArthur Riggs Diabetes & Metabolism Research InstituteCity of Hope National Medical CenterDuarteCaliforniaUSA
| | - Enrique Montero
- Department of Molecular & Cellular EndocrinologyArthur Riggs Diabetes & Metabolism Research InstituteCity of Hope National Medical CenterDuarteCaliforniaUSA
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7
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Wang W, Ren X, Chen X, Hong Q, Cai G. Integrin β1-rich extracellular vesicles of kidney recruit Fn1+ macrophages to aggravate ischemia-reperfusion-induced inflammation. JCI Insight 2024; 9:e169885. [PMID: 38258908 PMCID: PMC10906229 DOI: 10.1172/jci.insight.169885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 12/05/2023] [Indexed: 01/24/2024] Open
Abstract
Ischemia-reperfusion injury-induced (IRI-induced) acute kidney injury is accompanied by mononuclear phagocyte (MP) invasion and inflammation. However, systematic analysis of extracellular vesicle-carried (EV-carried) proteins mediating intercellular crosstalk in the IRI microenvironment is still lacking. Multiomics analysis combining single-cell RNA-Seq data of kidney and protein profiling of kidney-EV was used to elucidate the intercellular communication between proximal tubular cells (PTs) and MP. Targeted adhesion and migration of various MPs were caused by the secretion of multiple chemokines as well as integrin β1-rich EV by ischemic-damaged PTs after IRI. These recruited MPs, especially Fn1+ macrophagocyte, amplified the surviving PT's inflammatory response by secreting the inflammatory factors TNF-α, MCP-1, and thrombospondin 1 (THBS-1), which could interact with integrin β1 to promote more MP adhesion and interact with surviving PT to further promote the secretion of IL-1β. However, GW4869 reduced MP infiltration and maintained a moderate inflammatory level likely by blocking EV secretion. Our findings establish the molecular bases by which chemokines and kidney-EV mediate PT-MP crosstalk in early IRI and provide insights into systematic intercellular communication.
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Affiliation(s)
- Wenjuan Wang
- School of Medicine, Nankai University, Tianjin, China
- Department of Nephrology, First Medical Center of Chinese PLA General Hospital, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing, China
| | - Xuejing Ren
- Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Henan Key Laboratory of Kidney Disease and Immunology, Zhengzhou, Henan, China
| | - Xiangmei Chen
- Department of Nephrology, First Medical Center of Chinese PLA General Hospital, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing, China
| | - Quan Hong
- Department of Nephrology, First Medical Center of Chinese PLA General Hospital, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing, China
| | - Guangyan Cai
- School of Medicine, Nankai University, Tianjin, China
- Department of Nephrology, First Medical Center of Chinese PLA General Hospital, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing, China
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8
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Wang X, Zheng H, Yang B, Zu M, Wang Z, Zhang J, Zheng F, Yang M, Tong MCF, Zhao L, Bai W. Estrogen as a guardian of auditory health: Tsp1-CD47 axis regulation and noise-induced hearing loss. Climacteric 2023:1-11. [PMID: 38108225 DOI: 10.1080/13697137.2023.2287632] [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: 09/12/2023] [Accepted: 12/18/2023] [Indexed: 12/19/2023]
Abstract
OBJECTIVES This study aimed to analyze the role of estrogen in noise-induced hearing loss (NIHL) and uncover underlying mechanisms. METHODS An ovariectomized Sprague-Dawley rat model (OVX) was constructed to investigate the hearing threshold and auditory latency before and after noise exposure using the auditory brainstem response (ABR) test. The morphological changes were assessed using immunofluorescence, scanning electron microscopy and transmission electron microscopy. Proteomics and bioinformatics were used to analyze the mechanism. The findings were further verified through western blot and Luminex liquid suspension chip technology. RESULTS After noise exposure, OVX rats exhibited substantially elevated hearing thresholds. A conspicuous delay in ABR wave I latency was observed, alongside increased loss of outer hair cells, severe collapse of stereocilia and pronounced deformation of the epidermal plate. Accordingly, OVX rats with estrogen supplementation exhibited tolerance to NIHL. Additionally, a remarkable upregulation of the thrombospondin 1 (Tsp1)-CD47 axis in OVX rats was discovered and verified. CONCLUSIONS OVX rats were more susceptible to NIHL, and the protective effect of estrogen was achieved through regulation of the Tsp1-CD47 axis. This study presents a novel mechanism through which estrogen regulates NIHL and offers a potential intervention strategy for the clinical treatment of NIHL.
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Affiliation(s)
- X Wang
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- State Key Lab of Hearing Science, Ministry of Education, Beijing, China
| | - H Zheng
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- State Key Lab of Hearing Science, Ministry of Education, Beijing, China
- Senior Department of Otolaryngology-Head & Neck Surgery, Sixth Medical Center of PLA General Hospital, Beijing, China
| | - B Yang
- Peking University Fifth School of Clinical Medicine, Beijing Hospital, Beijing, China
| | - M Zu
- Institute of Health Service and Transfusion Medicine, Academy of Military Medical Sciences, Beijing, China
| | - Z Wang
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
| | - J Zhang
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
| | - F Zheng
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- State Key Lab of Hearing Science, Ministry of Education, Beijing, China
- Senior Department of Otolaryngology-Head & Neck Surgery, Sixth Medical Center of PLA General Hospital, Beijing, China
| | - M Yang
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
| | - M C F Tong
- Department of Otorhinolaryngology, Head and Neck Surgery, Chinese University of Hong Kong, Hong Kong, China
| | - L Zhao
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- State Key Lab of Hearing Science, Ministry of Education, Beijing, China
- Senior Department of Otolaryngology-Head & Neck Surgery, Sixth Medical Center of PLA General Hospital, Beijing, China
| | - W Bai
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
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Barbosa ACS, Mauroner LG, Kumar J, Sims-Lucas S. Delayed graft function post renal transplantation: a review on animal models and therapeutics. Am J Physiol Renal Physiol 2023; 325:F817-F825. [PMID: 37855040 PMCID: PMC10878700 DOI: 10.1152/ajprenal.00146.2023] [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: 05/31/2023] [Revised: 10/11/2023] [Accepted: 10/11/2023] [Indexed: 10/20/2023] Open
Abstract
The incidence of end-stage renal disease (ESRD) has been increasing worldwide. Its treatment involves renal replacement therapy, either by dialyses or renal transplantation from a living or deceased donor. Although the initial mortality rates for patients on dialysis are comparable with kidney transplant recipients, the quality of life and long-term prognosis are greatly improved in transplanted patients. However, there is a large gap between availability and need for donor kidneys. This has led to the increase in the use of expanded kidney donor criteria. Allograft dysfunction immediately after transplant sets it up for many complications, such as acute rejection and shorter allograft survival. Delayed graft function (DGF) is one of the immediate posttransplant insults to the kidney allograft, which is increasing in prevalence due to efforts to maximize the available donor pool for kidneys and use of expanded kidney donor criteria. In this review, we discuss the risk factors for DGF, its implications for long-term allograft survival, animal models of DGF, and the therapeutic options currently under evaluation for prevention and management of DGF.
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Affiliation(s)
- Anne C S Barbosa
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh, UPMC Children's Hospital, Pittsburgh, Pennsylvania, United States
| | - Lillian G Mauroner
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh, UPMC Children's Hospital, Pittsburgh, Pennsylvania, United States
| | - Juhi Kumar
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh, UPMC Children's Hospital, Pittsburgh, Pennsylvania, United States
| | - Sunder Sims-Lucas
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh, UPMC Children's Hospital, Pittsburgh, Pennsylvania, United States
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10
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Ghimire K, Kale A, Li J, Julovi SM, O'Connell P, Grey ST, Hawthorne WJ, Gunton JE, Rogers NM. A metabolic role for CD47 in pancreatic β cell insulin secretion and islet transplant outcomes. Sci Transl Med 2023; 15:eadd2387. [PMID: 37820008 DOI: 10.1126/scitranslmed.add2387] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 09/18/2023] [Indexed: 10/13/2023]
Abstract
Diabetes is a global public health burden and is characterized clinically by relative or absolute insulin deficiency. Therapeutic agents that stimulate insulin secretion and improve insulin sensitivity are in high demand as treatment options. CD47 is a cell surface glycoprotein implicated in multiple cellular functions including recognition of self, angiogenesis, and nitric oxide signaling; however, its role in the regulation of insulin secretion remains unknown. Here, we demonstrate that CD47 receptor signaling inhibits insulin release from human as well as mouse pancreatic β cells and that it can be pharmacologically exploited to boost insulin secretion in both models. CD47 depletion stimulated insulin granule exocytosis via activation of the Rho GTPase Cdc42 in β cells and improved glucose clearance and insulin sensitivity in vivo. CD47 blockade enhanced syngeneic islet transplantation efficiency and expedited the return to euglycemia in streptozotocin-induced diabetic mice. Further, anti-CD47 antibody treatment delayed the onset of diabetes in nonobese diabetic (NOD) mice and protected them from overt diabetes. Our findings identify CD47 as a regulator of insulin secretion, and its manipulation in β cells offers a therapeutic opportunity for diabetes and islet transplantation by correcting insulin deficiency.
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Affiliation(s)
- Kedar Ghimire
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research (WIMR), University of Sydney, Sydney, NSW 2145, Australia
- Westmead Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2145, Australia
| | - Atharva Kale
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research (WIMR), University of Sydney, Sydney, NSW 2145, Australia
| | - Jennifer Li
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research (WIMR), University of Sydney, Sydney, NSW 2145, Australia
| | - Sohel M Julovi
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research (WIMR), University of Sydney, Sydney, NSW 2145, Australia
| | - Philip O'Connell
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research (WIMR), University of Sydney, Sydney, NSW 2145, Australia
- Westmead Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2145, Australia
| | - Shane T Grey
- Transplantation Immunology Laboratory, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
- School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, NSW 2052, Australia
| | - Wayne J Hawthorne
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research (WIMR), University of Sydney, Sydney, NSW 2145, Australia
- Westmead Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2145, Australia
| | - Jenny E Gunton
- Westmead Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2145, Australia
- Centre for Diabetes, Obesity and Endocrinology, WIMR, University of Sydney, Sydney, NSW 2145, Australia
| | - Natasha M Rogers
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research (WIMR), University of Sydney, Sydney, NSW 2145, Australia
- Westmead Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2145, Australia
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11
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Haj-Yehia E, Korste S, Jochem R, Lusha A, Roth A, Dietzel N, Niroomand J, Stock P, Westendorf AM, Buer J, Hendgen-Cotta UB, Rassaf T, Totzeck M. CD47 blockade enhances phagocytosis of cardiac cell debris by neutrophils. IJC HEART & VASCULATURE 2023; 48:101269. [PMID: 37731517 PMCID: PMC10507185 DOI: 10.1016/j.ijcha.2023.101269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 09/01/2023] [Accepted: 09/05/2023] [Indexed: 09/22/2023]
Abstract
CD47 is a cell surface protein controlling phagocytotic activity of innate immune cells. CD47 blockade was investigated as an immune checkpoint therapy in cancer treatment, enhancing phagocytosis of tumor cells by macrophages. Anti-CD47 treatment also reduced injury size during reperfused acute myocardial infarction (repAMI) by enhancing phagocytotic acitivity of macrophages. Little is known about the impact of CD47 blockade on neutrophils, representing the main portion of early infiltrating immune cells after repAMI. Therefore, we performed 45 min of cardiac ischemia followed by 24 h of reperfusion, observing a decreased cardiac injury size measured by triphenyl tetrazolium chloride (TTC) Evan's blue staining. We were able to detect this effect with an innovative three-dimensional method based on light sheet fluorescence microscopy (LSFM). This further allowed us a simultaneous analysis of neutrophil infiltration, showing an unaltered amount of injury-associated neutrophils with reduced cardiac injury volume from repAMI. This observation suggests modulated phagocytosis of cell debris by neutrophils. Therefore, we performed flow cytometry analysis, revealing an increased phagocytotic activity of neutrophils in vitro. These findings highlight that CD47 blockade also enhances phagocytosis of cardiac cell debris by neutrophils, which might be an additional protective effect of anti-CD47 treatment after repAMI.
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Affiliation(s)
- Elias Haj-Yehia
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Sebastian Korste
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Robert Jochem
- Department of Nephrology, University Hospital Essen, 45147 Essen, Germany
| | - Aldona Lusha
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Anna Roth
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Nina Dietzel
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Josefine Niroomand
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Pia Stock
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Astrid M. Westendorf
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Ulrike B. Hendgen-Cotta
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Tienush Rassaf
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
| | - Matthias Totzeck
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, 45147 Essen, Germany
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12
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Li JSY, Robertson H, Trinh K, Raghubar AM, Nguyen Q, Matigian N, Patrick E, Thomson AW, Mallett AJ, Rogers NM. Tolerogenic dendritic cells protect against acute kidney injury. Kidney Int 2023; 104:492-507. [PMID: 37244471 DOI: 10.1016/j.kint.2023.05.008] [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: 05/29/2022] [Revised: 04/12/2023] [Accepted: 05/11/2023] [Indexed: 05/29/2023]
Abstract
Ischemia reperfusion injury is a common precipitant of acute kidney injury that occurs following disrupted perfusion to the kidney. This includes blood loss and hemodynamic shock, as well as during retrieval for deceased donor kidney transplantation. Acute kidney injury is associated with adverse long-term clinical outcomes and requires effective interventions that can modify the disease process. Immunomodulatory cell therapies such as tolerogenic dendritic cells remain a promising tool, and here we tested the hypothesis that adoptively transferred tolerogenic dendritic cells can limit kidney injury. The phenotypic and genomic signatures of bone marrow-derived syngeneic or allogeneic, Vitamin-D3/IL-10-conditioned tolerogenic dendritic cells were assessed. These cells were characterized by high PD-L1:CD86, elevated IL-10, restricted IL-12p70 secretion and a suppressed transcriptomic inflammatory profile. When infused systemically, these cells successfully abrogated kidney injury without modifying infiltrating inflammatory cell populations. They also provided protection against ischemia reperfusion injury in mice pre-treated with liposomal clodronate, suggesting the process was regulated by live, rather than reprocessed cells. Co-culture experiments and spatial transcriptomic analysis confirmed reduced kidney tubular epithelial cell injury. Thus, our data provide strong evidence that peri-operatively administered tolerogenic dendritic cells have the ability to protect against acute kidney injury and warrants further exploration as a therapeutic option. This technology may provide a clinical advantage for bench-to-bedside translation to affect patient outcomes.
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Affiliation(s)
- Jennifer S Y Li
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia; Sydney Medical School, Faculty of Health and Medicine, University of Sydney, Sydney, New South Wales, Australia; Department of Renal Medicine, Westmead Hospital, Westmead, New South Wales, Australia
| | - Harry Robertson
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia; School of Mathematics and Statistics, University of Sydney, Sydney, New South Wales, Australia
| | - Katie Trinh
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Arti M Raghubar
- Institute for Molecular Bioscience, the University of Queensland, Brisbane, Queensland, Australia
| | - Quan Nguyen
- Institute for Molecular Bioscience, the University of Queensland, Brisbane, Queensland, Australia
| | - Nicholas Matigian
- Institute for Molecular Bioscience, the University of Queensland, Brisbane, Queensland, Australia; Queensland Cyber Infrastructure Foundation Bioinformatics, Brisbane, Queensland, Australia
| | - Ellis Patrick
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia; School of Mathematics and Statistics, University of Sydney, Sydney, New South Wales, Australia
| | - Angus W Thomson
- Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Andrew J Mallett
- Institute for Molecular Bioscience, the University of Queensland, Brisbane, Queensland, Australia; Department of Renal Medicine, Townsville University Hospital, Townsville, Queensland, Australia; College of Medicine and Dentistry, James Cook University, Townsville, Queensland, Australia
| | - Natasha M Rogers
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia; Sydney Medical School, Faculty of Health and Medicine, University of Sydney, Sydney, New South Wales, Australia; Department of Renal Medicine, Westmead Hospital, Westmead, New South Wales, Australia.
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13
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Montero E, Isenberg JS. The TSP1-CD47-SIRPα interactome: an immune triangle for the checkpoint era. Cancer Immunol Immunother 2023; 72:2879-2888. [PMID: 37217603 PMCID: PMC10412679 DOI: 10.1007/s00262-023-03465-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/09/2023] [Indexed: 05/24/2023]
Abstract
The use of treatments, such as programmed death protein 1 (PD1) or cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) antibodies, that loosen the natural checks upon immune cell activity to enhance cancer killing have shifted clinical practice and outcomes for the better. Accordingly, the number of antibodies and engineered proteins that interact with the ligand-receptor components of immune checkpoints continue to increase along with their use. It is tempting to view these molecular pathways simply from an immune inhibitory perspective. But this should be resisted. Checkpoint molecules can have other cardinal functions relevant to the development and use of blocking moieties. Cell receptor CD47 is an example of this. CD47 is found on the surface of all human cells. Within the checkpoint paradigm, non-immune cell CD47 signals through immune cell surface signal regulatory protein alpha (SIRPα) to limit the activity of the latter, the so-called trans signal. Even so, CD47 interacts with other cell surface and soluble molecules to regulate biogas and redox signaling, mitochondria and metabolism, self-renewal factors and multipotency, and blood flow. Further, the pedigree of checkpoint CD47 is more intricate than supposed. High-affinity interaction with soluble thrombospondin-1 (TSP1) and low-affinity interaction with same-cell SIRPα, the so-called cis signal, and non-SIRPα ectodomains on the cell membrane suggests that multiple immune checkpoints converge at and through CD47. Appreciation of this may provide latitude for pathway-specific targeting and intelligent therapeutic effect.
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Affiliation(s)
- Enrique Montero
- Department of Diabetes Immunology, City of Hope National Medical Center, 1500 Duarte Road, Duarte, CA, 91010, USA
- Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope National Medical Center, 1500 Duarte Road, Duarte, CA, 91010, USA
| | - Jeffrey S Isenberg
- Department of Diabetes Complications and Metabolism, City of Hope National Medical Center, 1500 Duarte Road, Duarte, CA, 91010, USA.
- Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope National Medical Center, 1500 Duarte Road, Duarte, CA, 91010, USA.
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14
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Shiratori-Aso S, Nakazawa D, Kudo T, Kanda M, Ueda Y, Watanabe-Kusunoki K, Nishio S, Iwasaki S, Tsuji T, Masuda S, Tomaru U, Ishizu A, Atsumi T. CD47 blockade ameliorates autoimmune vasculitis via efferocytosis of neutrophil extracellular traps. JCI Insight 2023; 8:e167486. [PMID: 37368493 PMCID: PMC10445685 DOI: 10.1172/jci.insight.167486] [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: 11/28/2022] [Accepted: 06/23/2023] [Indexed: 06/29/2023] Open
Abstract
Neutrophil extracellular trap (NET) formation contributes to immune defense and is a distinct form of cell death. Excessive NET formation is found in patients with anti-neutrophil cytoplasmic antibody-associated (ANCA-associated) vasculitis (AAV), contributing to disease progression. The clearance of dead cells by macrophages, a process known as efferocytosis, is regulated by the CD47-mediated "don't eat me" signal. Hence, we hypothesized that pathogenic NETs in AAV escape from efferocytosis via the CD47 signaling pathway, resulting in the development of necrotizing vasculitis. Immunostaining for CD47 in human renal tissues revealed high CD47 expression in crescentic glomerular lesions of patients with AAV. In ex vivo studies, ANCA-induced netting neutrophils increased the expression of CD47 with the reduction of efferocytosis. After efferocytosis, macrophages displayed proinflammatory phenotypes. The blockade of CD47 in spontaneous crescentic glomerulonephritis-forming/Kinjoh (SCG/Kj) mice ameliorated renal disease and reduced myeloperoxidase-ANCA (MPO-ANCA) titers with a reduction in NET formation. Thus, CD47 blockade would protect against developing glomerulonephritis in AAV via restored efferocytosis of ANCA-induced NETs.
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Affiliation(s)
- Satoka Shiratori-Aso
- Department of Rheumatology, Endocrinology, and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Daigo Nakazawa
- Department of Rheumatology, Endocrinology, and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takashi Kudo
- Department of Rheumatology, Endocrinology, and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Masatoshi Kanda
- Division of Rheumatology and Clinical Immunology, Sapporo Medical University, Sapporo, Japan
| | - Yusho Ueda
- Department of Rheumatology, Endocrinology, and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Kanako Watanabe-Kusunoki
- Department of Rheumatology, Endocrinology, and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Saori Nishio
- Department of Rheumatology, Endocrinology, and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Sari Iwasaki
- Department of Pathology, Sapporo City General Hospital, Sapporo, Japan
| | - Takahiro Tsuji
- Department of Pathology, Sapporo City General Hospital, Sapporo, Japan
| | - Sakiko Masuda
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Utano Tomaru
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Akihiro Ishizu
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Tatsuya Atsumi
- Department of Rheumatology, Endocrinology, and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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15
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Wen N, Wu J, Li H, Liao J, Lan L, Yang X, Zhu G, Lei Z, Dong J, Sun X. Immune landscape in rejection of renal transplantation revealed by high-throughput single-cell RNA sequencing. Front Cell Dev Biol 2023; 11:1208566. [PMID: 37547477 PMCID: PMC10397399 DOI: 10.3389/fcell.2023.1208566] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 07/12/2023] [Indexed: 08/08/2023] Open
Abstract
Background: The role of the cellular level in kidney transplant rejection is unclear, and single-cell RNA sequencing (scRNA-seq) can reveal the single-cell landscape behind rejection of human kidney allografts at the single-cell level. Methods: High-quality transcriptomes were generated from scRNA-seq data from five human kidney transplantation biopsy cores. Cluster analysis was performed on the scRNA-seq data by known cell marker genes in order to identify different cell types. In addition, pathways, pseudotime developmental trajectories and transcriptional regulatory networks involved in different cell subpopulations were explored. Next, we systematically analyzed the scoring of gene sets regarding single-cell expression profiles based on biological processes associated with oxidative stress. Results: We obtained 81,139 single cells by scRNA-seq from kidney transplant tissue biopsies of three antibody-mediated rejection (ABMR) patients and two acute kidney injury (AKI) patients with non-rejection causes and identified 11 cell types, including immune cells, renal cells and several stromal cells. Immune cells such as macrophages showed inflammatory activation and antigen presentation and complement signaling, especially in rejection where some subpopulations of cells specifically expressed in rejection showed specific pro-inflammatory responses. In addition, patients with rejection are characterized by an increased number of fibroblasts, and further analysis of subpopulations of fibroblasts revealed their involvement in inflammatory and fibrosis-related pathways leading to increased renal rejection and fibrosis. Notably, the gene set score for response to oxidative stress was higher in patients with rejection. Conclusion: Insight into histological differences in kidney transplant patients with or without rejection was gained by assessing differences in cellular levels at single-cell resolution. In conclusion, we applied scRNA-seq to rejection after renal transplantation to deconstruct its heterogeneity and identify new targets for personalized therapeutic approaches.
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Affiliation(s)
- Ning Wen
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
- Guangxi Key Laboratory of Organ Donation and Transplantation, Nanning, China
- Guangxi Clinical Research Center for Organ Transplantation, Nanning, China
| | - Jihua Wu
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
- Guangxi Key Laboratory of Organ Donation and Transplantation, Nanning, China
- Guangxi Clinical Research Center for Organ Transplantation, Nanning, China
| | - Haibin Li
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
- Guangxi Key Laboratory of Organ Donation and Transplantation, Nanning, China
- Guangxi Clinical Research Center for Organ Transplantation, Nanning, China
| | - Jixiang Liao
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Liugen Lan
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Xiawei Yang
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Guangyi Zhu
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zhiying Lei
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jianhui Dong
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Xuyong Sun
- Transplant Medical Center, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
- Guangxi Key Laboratory of Organ Donation and Transplantation, Nanning, China
- Guangxi Clinical Research Center for Organ Transplantation, Nanning, China
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16
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Rogers NM, Zammit N, Nguyen-Ngo D, Souilmi Y, Minhas N, Meijles DN, Self E, Walters SN, Warren J, Cultrone D, El-Rashid M, Li J, Chtanova T, O'Connell PJ, Grey ST. The impact of the cytoplasmic ubiquitin ligase TNFAIP3 gene variation on transcription factor NF-κB activation in acute kidney injury. Kidney Int 2023; 103:1105-1119. [PMID: 37097268 DOI: 10.1016/j.kint.2023.02.030] [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: 08/23/2021] [Revised: 02/08/2023] [Accepted: 02/23/2023] [Indexed: 04/26/2023]
Abstract
Nuclear factor κB (NF-κB) activation is a deleterious molecular mechanism that drives acute kidney injury (AKI) and manifests in transplanted kidneys as delayed graft function. The TNFAIP3 gene encodes A20, a cytoplasmic ubiquitin ligase and a master negative regulator of the NF- κB signaling pathway. Common population-specific TNFAIP3 coding variants that reduce A20's enzyme function and increase NF- κB activation have been linked to heightened protective immunity and autoimmune disease, but have not been investigated in AKI. Here, we functionally identified a series of unique human TNFAIP3 coding variants linked to the autoimmune genome-wide association studies single nucleotide polymorphisms of F127C; namely F127C;R22Q, F127C;G281E, F127C;W448C and F127C;N449K that reduce A20's anti-inflammatory function in an NF- κB reporter assay. To investigate the impact of TNFAIP3 hypomorphic coding variants in AKI we tested a mouse Tnfaip3 hypomorph in a model of ischemia reperfusion injury (IRI). The mouse Tnfaip3 coding variant I325N increases NF- κB activation without overt inflammatory disease, providing an immune boost as I325N mice exhibit enhanced innate immunity to a bacterial challenge. Surprisingly, despite exhibiting increased intra-kidney NF- κB activation with inflammation in IRI, the kidney of I325N mice was protected. The I325N variant influenced the outcome of IRI by changing the dynamic expression of multiple cytoprotective mechanisms, particularly by increasing NF- κB-dependent anti-apoptotic factors BCL-2, BCL-XL, c-FLIP and A20, altering the active redox state of the kidney with a reduction of superoxide levels and the enzyme super oxide dismutase-1, and enhancing cellular protective mechanisms including increased Foxp3+ T cells. Thus, TNFAIP3 gene variants represent a kidney and population-specific molecular factor that can dictate the course of IRI.
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Affiliation(s)
- Natasha M Rogers
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia; Renal and Transplant Medicine Unit, Westmead Hospital, Westmead, New South Wales, Australia; Westmead Clinical School, University of Sydney, New South Wales, Australia
| | - Nathan Zammit
- Transplantation Immunology Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia; Translational Research Pillar, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
| | - Danny Nguyen-Ngo
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Yassine Souilmi
- Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, South Australia, Australia; Environment Institute, Faculty of Sciences, University of Adelaide, South Australia, Australia
| | - Nikita Minhas
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Daniel N Meijles
- Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
| | - Eleanor Self
- Transplantation Immunology Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia; Translational Research Pillar, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
| | - Stacey N Walters
- Transplantation Immunology Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia; Translational Research Pillar, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
| | - Joanna Warren
- Transplantation Immunology Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia; Translational Research Pillar, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
| | - Daniele Cultrone
- Transplantation Immunology Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia; Translational Research Pillar, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
| | - Maryam El-Rashid
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Jennifer Li
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Tatyana Chtanova
- Translational Research Pillar, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia; Innate and Tumour Immunology Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia; School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, New South Wales, Australia
| | - Philip J O'Connell
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia; Renal and Transplant Medicine Unit, Westmead Hospital, Westmead, New South Wales, Australia; Westmead Clinical School, University of Sydney, New South Wales, Australia
| | - Shane T Grey
- Transplantation Immunology Laboratory, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia; Translational Research Pillar, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia; School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, New South Wales, Australia.
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17
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Zhao W, Shen B, Cheng Q, Zhou Y, Chen K. Roles of TSP1-CD47 signaling pathway in senescence of endothelial cells: cell cycle, inflammation and metabolism. Mol Biol Rep 2023; 50:4579-4585. [PMID: 36897523 DOI: 10.1007/s11033-023-08357-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 02/23/2023] [Indexed: 03/11/2023]
Abstract
Endothelial cells (ECs) serve as a barrier with forming a monolayer lining in the surface of vascular system. Many mature cell types are post-mitotic like neurons, but ECs have the ability to grow during angiogenesis. Vascular endothelial growth factor (VEGF) stimulates growth of vascular ECs derived from arteries, veins, and lymphatics and induces angiogenesis. Senescence of ECs is regarded as a key contributor in aging-induced vascular dysfunction via evoking increase of ECs permeability, impairment of angiogenesis and vascular repair. Several genomics and proteomics studies on ECs senescence reported changes in gene and protein expression that directly correlate with vascular systemic disorder. CD47 functions as a signaling receptor for secreted matricellular protein thrombospondin-1 (TSP1) and plays an important role in several fundamental cellular functions, including proliferation, apoptosis, inflammation, and atherosclerotic response. TSP1-CD47 signaling is upregulated with age in ECs, concurrent with suppression of key self-renewal genes. Recent studies indicate that CD47 is involved in regulation of senescence, self-renewal and inflammation. In this review, we highlight the functions of CD47 in senescent ECs, including modulation of cell cycle, mediation of inflammation and metabolism by the experimental studies, which may provide CD47 as a potential therapeutic target for aging-associated vascular dysfunction.
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Affiliation(s)
- Wei Zhao
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Botao Shen
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Quanli Cheng
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Yangyang Zhou
- Department of Neurology, The First Hospital of Jilin University, Changchun, China.
| | - Kexin Chen
- Institute of Translational Medicine, The First Hospital of Jilin University, Changchun, China.
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18
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Chen X, Xie K, Sun X, Zhang C, He H. The Mechanism of miR-21-5p/TSP-1-Mediating Exercise on the Function of Endothelial Progenitor Cells in Aged Rats. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:1255. [PMID: 36674009 PMCID: PMC9858635 DOI: 10.3390/ijerph20021255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/30/2022] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
(1) Background: The declined function of peripheral circulating endothelial progenitor cells (EPCs) in aging individuals resulted in decreased endothelial cell regeneration and vascular endothelial function. Improving EPCs function in aging individuals plays an important role in preventing cardiovascular diseases. (2) Methods: Thirty aged (18-month-old) male Sprague-Dawley rats were randomly divided into control and exercise groups. An aerobic exercise intervention was performed 5 days/week for 8 weeks. EPCs functions, miR-21-5p, and TSP-1 expressions were detected after the intervention. The senescence rate, proliferation, and migration of EPCs were examined after overexpression of miR-21-5p and inhibition of TSP-1 expression. (3) Results: The senescence rate, proliferation, and migration of EPCs in exercise groups were significantly improved after exercise intervention. The miR-21-5p expression was increased and the TSP-1 mRNA expression was decreased in the EPCs after the intervention. miR-21-5p overexpression can improve EPCs function and inhibit TSP-1 expression but has no effect on senescence rate. Inhibition of TSP-1 expression could improve the function and reduce the senescence rate. (4) Conclusions: Our results indicate that long-term aerobic exercise can improve the functions of EPCs in aging individuals by downregulating TSP-1 expression via miR-21-5p, which reveals the mechanism of exercise in improving cardiovascular function.
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Affiliation(s)
- Xiaoke Chen
- School of Sports Science, Beijing Sport University, Beijing 100084, China
| | - Kejia Xie
- School of Sports Science, Beijing Sport University, Beijing 100084, China
| | - Xinzheng Sun
- School of Sports Science, Beijing Sport University, Beijing 100084, China
| | - Chengzhu Zhang
- School of Sports Science, Beijing Sport University, Beijing 100084, China
| | - Hui He
- China Institute of Sport and Health Science, Beijing Sport University, Beijing 100084, China
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19
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Zhu Z, Huang F, Jiang Y, Ruan S, Liu M, Zhang Y, Li Y, Chen J, Cui Y, Chen Z, Chen H, Zeng F. OLMALINC/OCT4/BMP2 axis enhances osteogenic-like phenotype of renal interstitial fibroblasts to participate in Randall's plaque formation. Mol Med 2022; 28:162. [PMID: 36581839 PMCID: PMC9798568 DOI: 10.1186/s10020-022-00576-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 11/15/2022] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Randall's plaques (RP) are identified as anchored sites for kidney calcium oxalate stones, but the mechanism remains unclear. Given the importance of osteogenic-like cells in RP formation and OCT4 in reprogramming differentiated cells to osteoblasts, the current study explored the potential role of OCT4 in RP formation. METHODS OCT4 and biomineralization were evaluated in RP, and immunofluorescence co-staining was performed to identify these cells with alteration of OCT4 and osteogenic markers. Based on the analysis of tissue, we further investigated the mechanism of OCT4 in regulating osteogenic-like differentiation of primary human renal interstitial fibroblasts (hRIFs) in vitro and vivo. RESULTS We identified the upregulated OCT4 in RP, with a positive correlation to osteogenic markers. Interestingly, fibroblast marker Vimentin was partially co-localized with upregulated OCT4 and osteogenic markers in RP. Further investigations revealed that OCT4 significantly enhanced the osteogenic-like phenotype of hRIFs in vitro and in vivo. Mechanically, OCT4 directly bound to BMP2 promoter and facilitated its CpG island demethylation to transcriptionally promote BMP2 expression. Furthermore, combination of RIP and RNA profiling uncovered that lncRNA OLMALINC physically interacted with OCT4 to promote its stabilization via disrupting the ubiquitination. Additionally, OLMALINC was upregulated in fibroblasts in RP visualized by FISH, and a positive correlation was revealed between OLMALINC and OCT4 in RP. CONCLUSIONS The upregulation of OCT4 in hRIFs was a pathological feature of RP formation, and OLMALINC/OCT4/BMP2 axis facilitated hRIFs to acquire osteogenic-like phenotype under osteogenic conditions, through which the pathway might participate in RP formation. Our findings opened up a new avenue to better understand RP formation in which osteogenic-like process was partially triggered by lncRNAs and pluripotency maintenance related genes.
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Affiliation(s)
- Zewu Zhu
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China ,grid.47100.320000000419368710Department of Internal Medicine, Section Endocrinology, Yale University School of Medicine, New Haven, CT USA
| | - Fang Huang
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Yingcheng Jiang
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Shuhao Ruan
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Minghui Liu
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Youjie Zhang
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Yongchao Li
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Jinbo Chen
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Yu Cui
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Zhiyong Chen
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Hequn Chen
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
| | - Feng Zeng
- grid.216417.70000 0001 0379 7164Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
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20
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Mishra M, Nichols L, Dave AA, Pittman EH, Cheek JP, Caroland AJV, Lotwala P, Drummond J, Bridges CC. Molecular Mechanisms of Cellular Injury and Role of Toxic Heavy Metals in Chronic Kidney Disease. Int J Mol Sci 2022; 23:11105. [PMID: 36232403 PMCID: PMC9569673 DOI: 10.3390/ijms231911105] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 01/10/2023] Open
Abstract
Chronic kidney disease (CKD) is a progressive disease that affects millions of adults every year. Major risk factors include diabetes, hypertension, and obesity, which affect millions of adults worldwide. CKD is characterized by cellular injury followed by permanent loss of functional nephrons. As injured cells die and nephrons become sclerotic, remaining healthy nephrons attempt to compensate by undergoing various structural, molecular, and functional changes. While these changes are designed to maintain appropriate renal function, they may lead to additional cellular injury and progression of disease. As CKD progresses and filtration decreases, the ability to eliminate metabolic wastes and environmental toxicants declines. The inability to eliminate environmental toxicants such as arsenic, cadmium, and mercury may contribute to cellular injury and enhance the progression of CKD. The present review describes major molecular alterations that contribute to the pathogenesis of CKD and the effects of arsenic, cadmium, and mercury on the progression of CKD.
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Affiliation(s)
- Manish Mishra
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA
| | - Larry Nichols
- Department of Pathology and Clinical Sciences Education, Mercer University School of Medicine, Macon, GA 31207, USA
| | - Aditi A. Dave
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA
| | - Elizabeth H Pittman
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA
| | - John P. Cheek
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA
| | - Anasalea J. V. Caroland
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA
| | - Purva Lotwala
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA
| | - James Drummond
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA
| | - Christy C. Bridges
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA
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21
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Normothermic Machine Perfusion in Renal Transplantation. CURRENT TRANSPLANTATION REPORTS 2022. [DOI: 10.1007/s40472-022-00378-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Abstract
Purpose of Review
Normothermic machine perfusion (NMP) is a promising new tool in kidney transplantation to improve the outcome of marginal donor kidney transplantation. This review examines the current evidence for NMP in clinical practice and considers how the technology may be used in the future.
Recent Findings and Summary
There is emerging evidence to suggest that NMP has the potential to expand the donor pool of transplantable organs. The safety and feasibility of NMP have been established in a number of clinical studies but more research is needed to optimise the perfusion conditions. NMP shows promise as a viability assessment tool with particular focus on biomarkers and imaging techniques which provide real-time information to facilitate transplantation decision-making. Moreover, the exciting development of new potential therapeutics such as cell and gene-based therapies which are deliverable during NMP may also improve and recondition grafts prior to implantation.
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22
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CD47 antibody protects mice from doxorubicin-induced myocardial damage by suppressing cardiomyocyte apoptosis. Exp Ther Med 2022; 23:350. [PMID: 35493436 PMCID: PMC9019770 DOI: 10.3892/etm.2022.11277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 03/04/2022] [Indexed: 11/29/2022] Open
Abstract
Cluster of differentiation 47 (CD47) is upregulated in mouse models of doxorubicin (Dox)-induced dilated cardiomyopathy (DCM). To explore the role of CD47 in the development of DCM, in the present study, CD47 signaling was blocked by an anti-CD47 neutralizing antibody (aCD47) in mice with Dox-induced DCM. Intraperitoneal (i.p.) administration of 10 mg/kg Dox once a week significantly induced the development of DCM after 4 weeks, which was accompanied by the upregulation of CD47 expression in heart tissues. However, co-administration of Dox with 7 mg/kg aCD47 once a week significantly reduced the severity of DCM, with lower numbers of disordered and broken myofibers, reduced cardiomyocytes and infiltration of macrophages in the heart tissues of treated mice. The beneficial effects were associated with the reduced population of Annexin V+7-AAD- apoptotic cells, and the attenuated formation of interstitial fibrosis and release of lactate dehydrogenase (LDH) in the aCD47-treated mice. In addition, co-administration with aCD47 effectively reduced the expression of Bax, collagen I, interleukin (IL)-6 and tumor necrosis factor (TNF)-α in murine DCM. These results were further supported by an in vitro study, in which aCD47 pre-treatment significantly reduced the Dox-induced early apoptosis of cardiomyocytes and suppressed the expression of Bax, cleaved caspase-1/3 and phosphorylation of p38 MAPK. Therefore, aCD47 attenuated DCM in mice, possibly by suppressing cardiomyocyte early apoptosis and p38 MAPK signaling. CD47 may be a useful therapeutic target in the treatment of DCM.
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23
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KLF4 Affects Acute Renal Allograft Injury via Binding to MicroRNA-155-5p Promoter to Regulate ERRFI1. DISEASE MARKERS 2022; 2022:5845627. [PMID: 35340414 PMCID: PMC8947908 DOI: 10.1155/2022/5845627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/12/2022] [Accepted: 02/15/2022] [Indexed: 11/18/2022]
Abstract
Kruppel-like factor 4 (KLF4) owns the promising potential in treating kidney injury, which inevitably occurs during renal allograft. Given that, this research targets to unveil KLF4-oriented mechanism from microRNA-155-5p/ERBB receptor feedback inhibitor 1 (miR-155-5p/ERRFI1) axis in acute renal allograft injury. Mice were injected with miR-155-5p-related sequences before acute renal allograft modeling. Afterwards, serum inflammation, along with oxidative stress, renal tubular injury, and apoptosis in renal tissues were detected. HK-2 cells were processed by hypoxia/reoxygenation (H/R) and transfected with miR-155-5p- or ERRFI1-related sequences, after which cell proliferation and apoptosis were measured. KLF4, miR-155-5p, and ERRFI1 expressions and their interaction were tested. KLF4 and miR-155-5p levels were enhanced, and ERRFI1 level was repressed in mice after acute renal allograft and in H/R-treated HK-2 cells. KLF4 bound to the promoter of miR-155-5p. Depleting miR-155-5p reduced serum inflammation and attenuated oxidative stress, renal tubular injury, and apoptosis in mice with acute renal allograft injury. Downregulating miR-155-5p facilitated proliferation and repressed apoptosis of H/R-treated HK-2 cells. miR-155-5p targeted ERRFI1. Knocking down ERRFI1 antagonized the effects of downregulated miR-155-5p on acute renal allograft injury, as well as on H/R-treated HK-2 cell proliferation and apoptosis. A summary displays that silencing KLF4 suppresses miR-155-5p to attenuate acute renal allograft injury by upregulating ERRFI1, which provides a way to control acute renal allograft injury.
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24
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Li D, Gwag T, Wang S. Absence of CD47 maintains brown fat thermogenic capacity and protects mice from aging-related obesity and metabolic disorder. Biochem Biophys Res Commun 2021; 575:14-19. [PMID: 34454175 DOI: 10.1016/j.bbrc.2021.08.062] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 08/23/2021] [Indexed: 02/04/2023]
Abstract
Brown and beige adipocytes burn energy to produce heat and could serve as a therapeutic target to counteract metabolic diseases including obesity and type 2 diabetes. Aging is associated with reduced brown fat mass and thermogenic capacity and a risk factor for metabolic diseases. Our previous studies implicated a role for CD47 in regulating brown fat function and energy balance in young adult animals. In this study, we further determined its role in natural aging related metabolic disorders. The results demonstrated that aged CD47 deficient mice (under normal chow diet) had reduced body weight and fat mass, and improved glucose tolerance as compared to aged wild type (WT) mice. Indirect calorimetry result showed that food intake and total activity were comparable between two genotypes. However, CD47 deficient mice had increased energy expenditure and better cold tolerance, accompanied by increased white adipose tissue browning and well-maintained juvenile morphology of brown adipose tissue (BAT). Moreover, transcriptome (RNA-seq) and pathway enrichment analysis revealed that BAT from aged CD47 deficient mice had upregulated genes involving in mitochondria oxidative phosphorylation, thermogenesis, fatty acid metabolism, and valine, leucine and isoleucine (BCAA) degradation, indicating the activated BAT status in aged CD47 deficient mice. Collectively, these data suggest that blocking CD47 signaling protects mice from natural aging-associated obesity and glucose intolerance, partially though activation and expansion of the thermogenic machinery, further supporting that CD47 maybe a potential target for aging related metabolic disorder.
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Affiliation(s)
- Dong Li
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY, 40536, USA; Lexington VA Medical Center, Lexington, KY, 40502, USA
| | - Taesik Gwag
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY, 40536, USA; Lexington VA Medical Center, Lexington, KY, 40502, USA
| | - Shuxia Wang
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY, 40536, USA; Lexington VA Medical Center, Lexington, KY, 40502, USA.
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25
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Siren EMJ, Luo HD, Tam F, Montgomery A, Enns W, Moon H, Sim L, Rey K, Guan Q, Wang JJ, Wardell CM, Monajemi M, Mojibian M, Levings MK, Zhang ZJ, Du C, Withers SG, Choy JC, Kizhakkedathu JN. Prevention of vascular-allograft rejection by protecting the endothelial glycocalyx with immunosuppressive polymers. Nat Biomed Eng 2021; 5:1202-1216. [PMID: 34373602 DOI: 10.1038/s41551-021-00777-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 06/30/2021] [Indexed: 02/07/2023]
Abstract
Systemic immunosuppression for the mitigation of immune rejection after organ transplantation causes adverse side effects and constrains the long-term benefits of the transplanted graft. Here we show that protecting the endothelial glycocalyx in vascular allografts via the enzymatic ligation of immunosuppressive glycopolymers under cold-storage conditions attenuates the acute and chronic rejection of the grafts after transplantation in the absence of systemic immunosuppression. In syngeneic and allogeneic mice that received kidney transplants, the steric and immunosuppressive properties of the ligated polymers largely protected the transplanted grafts from ischaemic reperfusion injury, and from immune-cell adhesion and thereby immunocytotoxicity. Polymer-mediated shielding of the endothelial glycocalyx following organ procurement should be compatible with clinical procedures for transplant preservation and perfusion, and may reduce the damage and rejection of transplanted organs after surgery.
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Affiliation(s)
- Erika M J Siren
- Centre for Blood Research, Life Sciences Institute, The University of British Columbia, Vancouver, British Columbia, Canada.,Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Haiming D Luo
- Centre for Blood Research, Life Sciences Institute, The University of British Columbia, Vancouver, British Columbia, Canada.,Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Franklin Tam
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Ashani Montgomery
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Winnie Enns
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Haisle Moon
- Centre for Blood Research, Life Sciences Institute, The University of British Columbia, Vancouver, British Columbia, Canada.,Department of Pathology and Laboratory Medicine, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Lyann Sim
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Kevin Rey
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Qiunong Guan
- Department of Urologic Sciences, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Jiao-Jing Wang
- Comprehensive Transplant Center, Northwestern University, Chicago, IL, USA
| | - Christine M Wardell
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada.,Department of Surgery, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Mahdis Monajemi
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada.,Department of Surgery, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Majid Mojibian
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada.,Department of Surgery, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Megan K Levings
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada.,Department of Surgery, The University of British Columbia, Vancouver, British Columbia, Canada.,School of Biomedical Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Zheng J Zhang
- Comprehensive Transplant Center, Northwestern University, Chicago, IL, USA
| | - Caigan Du
- Department of Urologic Sciences, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Stephen G Withers
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Jonathan C Choy
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada.
| | - Jayachandran N Kizhakkedathu
- Centre for Blood Research, Life Sciences Institute, The University of British Columbia, Vancouver, British Columbia, Canada. .,Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada. .,Department of Pathology and Laboratory Medicine, The University of British Columbia, Vancouver, British Columbia, Canada. .,School of Biomedical Engineering, The University of British Columbia, Vancouver, British Columbia, Canada.
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26
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Chen Z, Fan T, Zhao X, Zhang Z. Depleting SOX2 improves ischemic stroke via lncRNA PVT1/microRNA-24-3p/STAT3 axis. Mol Med 2021; 27:107. [PMID: 34521353 PMCID: PMC8439026 DOI: 10.1186/s10020-021-00346-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 07/26/2021] [Indexed: 11/10/2022] Open
Abstract
Objectives Studies have widely explored in the filed of ischemic stroke (IS) with their focus on transcription factors. However, few studies have pivoted on sex determining region Y-box 2 (SOX2) in IS. Thus, this study is launched to figure out the mechanisms of SOX2 in IS. Methods Rat middle cerebral artery occlusion (MCAO) was established as a stroke model. MCAO rats were injected with depleted SOX2 or long non-coding RNA plasmacytoma variant translocation 1 (PVT1) to explore their roles in neurological deficits, cerebral water content, neuron survival, apoptosis and oxidative stress. The relationship among SOX2, PVT1, microRNA (miR)-24-3p and signal transducer and activator of transcription 3 (STAT3) was verified by a series of experiments. Results SOX2, PVT1 and STAT3 were highly expressed while miR-24-3p was poorly expressed in cerebral cortex tissues of MCAO rats. Depleted SOX2 or PVT1 alleviated brain injury in MCAO rats as reflected by neuronal apoptosis and oxidative stress restriction, brain water content reduction, and neurological deficit and neuron survival improvements. Overexpression of PVT1 functioned oppositely. Restored miR-24-3p abolished PVT1 overexpression-induced brain injury in MCAO rats. SOX2 directly promoted PVT1 expression and further increased STAT3 by sponging miR-24-3p. Conclusion This study presents that depleting SOX2 improves IS via PVT1/miR-24-3p/STAT3 axis which may broaden our knowledge about the mechanisms of SOX2/PVT1/miR-24-3p/STAT3 axis and provide a reference of therapy for IS.
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Affiliation(s)
- Zhongjun Chen
- Neurological Intervention Department, Dalian Municipal Central Hospital, Dalian, 116033, Liaoning, China
| | - Tieping Fan
- Neurological Intervention Department, Dalian Municipal Central Hospital, Dalian, 116033, Liaoning, China
| | - Xusheng Zhao
- Neurological Intervention Department, Dalian Municipal Central Hospital, Dalian, 116033, Liaoning, China
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27
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Roberts DD, Isenberg JS. CD47 and thrombospondin-1 regulation of mitochondria, metabolism, and diabetes. Am J Physiol Cell Physiol 2021; 321:C201-C213. [PMID: 34106789 DOI: 10.1152/ajpcell.00175.2021] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Thrombospondin-1 (TSP1) is the prototypical member of a family of secreted proteins that modulate cell behavior by engaging with molecules in the extracellular matrix and with receptors on the cell surface. CD47 is widely displayed on many, if not all, cell types and is a high-affinity TSP1 receptor. CD47 is a marker of self that limits innate immune cell activities, a feature recently exploited to enhance cancer immunotherapy. Another major role for CD47 in health and disease is to mediate TSP1 signaling. TSP1 acting through CD47 contributes to mitochondrial, metabolic, and endocrine dysfunction. Studies in animal models found that elevated TSP1 expression, acting in part through CD47, causes mitochondrial and metabolic dysfunction. Clinical studies established that abnormal TSP1 expression positively correlates with obesity, fatty liver disease, and diabetes. The unabated increase in these conditions worldwide and the availability of CD47 targeting drugs justify a closer look into how TSP1 and CD47 disrupt metabolic balance and the potential for therapeutic intervention.
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Affiliation(s)
- David D Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
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28
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Thrombospondin-1 CD47 Signalling: From Mechanisms to Medicine. Int J Mol Sci 2021; 22:ijms22084062. [PMID: 33920030 PMCID: PMC8071034 DOI: 10.3390/ijms22084062] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/19/2021] [Accepted: 03/30/2021] [Indexed: 02/07/2023] Open
Abstract
Recent advances provide evidence that the cellular signalling pathway comprising the ligand-receptor duo of thrombospondin-1 (TSP1) and CD47 is involved in mediating a range of diseases affecting renal, vascular, and metabolic function, as well as cancer. In several instances, research has barely progressed past pre-clinical animal models of disease and early phase 1 clinical trials, while for cancers, anti-CD47 therapy has emerged from phase 2 clinical trials in humans as a crucial adjuvant therapeutic agent. This has important implications for interventions that seek to capitalize on targeting this pathway in diseases where TSP1 and/or CD47 play a role. Despite substantial progress made in our understanding of this pathway in malignant and cardiovascular disease, knowledge and translational gaps remain regarding the role of this pathway in kidney and metabolic diseases, limiting identification of putative drug targets and development of effective treatments. This review considers recent advances reported in the field of TSP1-CD47 signalling, focusing on several aspects including enzymatic production, receptor function, interacting partners, localization of signalling, matrix-cellular and cell-to-cell cross talk. The potential impact that these newly described mechanisms have on health, with a particular focus on renal and metabolic disease, is also discussed.
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29
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Gao L, Yang TT, Zhang JS, Liu HX, Cai DC, Wang LT, Wang J, Li XW, Gao K, Zhang SY, Cao YJ, Ji XX, Yang MM, Han B, Wang S, He L, Nie XY, Liu DM, Meng G, He CY. THBS1/CD47 Modulates the Interaction of γ-Catenin With E-Cadherin and Participates in Epithelial-Mesenchymal Transformation in Lipid Nephrotoxicity. Front Cell Dev Biol 2021; 8:601521. [PMID: 33681182 PMCID: PMC7930485 DOI: 10.3389/fcell.2020.601521] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 12/31/2020] [Indexed: 12/28/2022] Open
Abstract
Hyperlipidemia, an important risk factor for cardiovascular and end-stage renal diseases, often aggravates renal injury and compromises kidney function. Here, histological analysis of human kidney samples revealed that high lipid levels induced the development of renal fibrosis. To elucidate the mechanism underlying lipid nephrotoxicity, we used two types of mouse models (Apoe−/− and C57BL/6 mice fed a 45 and 60% high-fat diet, respectively). Histological analysis of kidney tissues revealed high-lipid-induced renal fibrosis and inflammation; this was confirmed by examining fibrotic and inflammatory marker expression using Western blotting and real-time polymerase chain reaction. Oxidized low-density lipoprotein (OX-LDL) significantly induced the fibrotic response in HK-2 tubular epithelial cells. RNA-sequencing and Gene Ontology analysis of differentially expressed mRNAs in OX-LDL-treated HK-2 tubular epithelial cells and real-time PCR validation in Apoe−/− mice showed that the expression of thrombospondin-1 (THBS1) in the high-fat group was significantly higher than that of the other top known genes, along with significant overexpression of its receptor CD47. THBS1 knockdown cells verified its relation to OX-LDL-induced fibrosis and inflammation. Liquid chromatography tandem mass spectrometry and STRING functional protein association network analyses predicted that THBS1/CD47 modulated the interaction between γ-catenin and E-cadherin and was involved in epithelial–mesenchymal transition, which was supported by immunoprecipitation and immunohistochemistry. CD47 downregulation following transfection with small-hairpin RNA in OX-LDL-treated tubular epithelial cells and treatment with anti-CD47 antibody restored the expression of E-cadherin and attenuated renal injury, fibrosis, and inflammatory response in OX-LDL-treated cells and in type 2 diabetes mellitus. These findings indicate that CD47 may serve as a potential therapeutic target in long-term lipid-induced kidney injury.
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Affiliation(s)
- Li Gao
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Ting-Ting Yang
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Jun-Sheng Zhang
- Pathophysiology Department, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Hong-Xia Liu
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Dong-Cheng Cai
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Lin-Tao Wang
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Jing Wang
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Xin-Wei Li
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Kun Gao
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Su-Ya Zhang
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Yu-Jia Cao
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Xiao-Xia Ji
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Miao-Miao Yang
- Pathophysiology Department, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Yizhiben Center for Judicial Expertise, Hefei, China
| | - Biao Han
- Pathophysiology Department, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Yizhiben Center for Judicial Expertise, Hefei, China
| | - Sheng Wang
- Center for Scientific Research of Anhui Medical University, Hefei, China
| | - Lu He
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Xiao-Yan Nie
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Dan-Mei Liu
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
| | - Gang Meng
- Pathophysiology Department, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Yizhiben Center for Judicial Expertise, Hefei, China
| | - Chao-Yong He
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China
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Improving Liver Graft Function Using CD47 Blockade in the Setting of Normothermic Machine Perfusion. Transplantation 2021; 106:37-47. [PMID: 33577253 DOI: 10.1097/tp.0000000000003688] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Towards the goal of utilizing more livers for transplantation, transplant centers are looking to increase the use of organs from "marginal" donors. Livers from these donors, however, have been shown to be more susceptible to preservation and reperfusion injury. METHODS Using a porcine model of donation after circulatory death (DCD), we studied the use of antibody-mediated CD47 blockade to further improve liver graft function undergoing normothermic machine perfusion. Livers from 20 pigs (5 per group) were brought under either 30 or 60 minutes of warm ischemia time (WIT) followed by the administration of CD47mAb treatment or IgG control antibodies and 6 hours of normothermic extracorporeal liver perfusion (NELP). RESULTS After 6 hours of NELP, CD47mAb-treated livers with 30 or 60 minutes WIT had significantly lower ALT levels and higher bile production compared to their respective control groups. Blockade of the CD47 signaling pathway resulted in significantly lower TSP-1 protein levels, lower expression of Caspase-3, and higher expression of pERK. CONCLUSIONS These findings suggested that CD47mAb treatment decreases ischemia/reperfusion injury through CD47/TSP-1 signaling downregulation and the presence of necrosis/apoptosis after reperfusion, and could increase liver regeneration during normothermic perfusion of the liver.Supplemental Visual Abstract; http://links.lww.com/TP/C146.
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El-Rashid M, Nguyen-Ngo D, Minhas N, Meijles DN, Li J, Ghimire K, Julovi S, Rogers NM. Repurposing of metformin and colchicine reveals differential modulation of acute and chronic kidney injury. Sci Rep 2020; 10:21968. [PMID: 33319836 PMCID: PMC7738483 DOI: 10.1038/s41598-020-78936-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 11/26/2020] [Indexed: 12/12/2022] Open
Abstract
Acute kidney injury (AKI) is a major health problem affecting millions of patients globally. There is no effective treatment for AKI and new therapies are urgently needed. Novel drug development, testing and progression to clinical trials is overwhelmingly expensive. Drug repurposing is a more cost-effective measure. We identified 2 commonly used drugs (colchicine and metformin) that alter inflammatory cell function and signalling pathways characteristic of AKI, and tested them in models of acute and chronic kidney injury to assess therapeutic benefit. We assessed the renoprotective effects of colchicine or metformin in C57BL/6 mice challenged with renal ischemia reperfusion injury (IRI), treated before or after injury. All animals underwent analysis of renal function and biomolecular phenotyping at 24 h, 48 h and 4 weeks after injury. Murine renal tubular epithelial cells were studied in response to in vitro mimics of IRI. Pre-emptive treatment with colchicine or metformin protected against AKI, with lower serum creatinine, improved histological changes and decreased TUNEL staining. Pro-inflammatory cytokine profile and multiple markers of oxidative stress were not substantially different between groups. Metformin augmented expression of multiple autophagic proteins which was reversed by the addition of hydroxychloroquine. Colchicine led to an increase in inflammatory cells within the renal parenchyma. Chronic exposure after acute injury to either therapeutic agent in the context of reduced renal mass did not mitigate the development of fibrosis, with colchicine significantly worsening an ischemic phenotype. These data indicate that colchicine and metformin affect acute and chronic kidney injury differently. This has significant implications for potential drug repurposing, as baseline renal disease must be considered when selecting medication.
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Affiliation(s)
- Maryam El-Rashid
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, 176 Hawkesbury Road, Westmead, NSW, 2145, Australia
| | - Danny Nguyen-Ngo
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, 176 Hawkesbury Road, Westmead, NSW, 2145, Australia
| | - Nikita Minhas
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, 176 Hawkesbury Road, Westmead, NSW, 2145, Australia
| | - Daniel N Meijles
- Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
| | - Jennifer Li
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, 176 Hawkesbury Road, Westmead, NSW, 2145, Australia
| | - Kedar Ghimire
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, 176 Hawkesbury Road, Westmead, NSW, 2145, Australia
| | - Sohel Julovi
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, 176 Hawkesbury Road, Westmead, NSW, 2145, Australia
| | - Natasha M Rogers
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, 176 Hawkesbury Road, Westmead, NSW, 2145, Australia. .,Westmead Clinical Medical School, University of Sydney, Camperdown, NSW, Australia. .,Renal Division, Westmead Hospital, Sydney, NSW, Australia. .,Department of Surgery, Thomas E. Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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32
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Qiu L, Lai X, Wang JJ, Yeap XY, Han S, Zheng F, Lin C, Zhang Z, Procissi D, Fang D, Li L, Thorp EB, Abecassis MM, Kanwar YS, Zhang ZJ. Kidney-intrinsic factors determine the severity of ischemia/reperfusion injury in a mouse model of delayed graft function. Kidney Int 2020; 98:1489-1501. [PMID: 32822703 PMCID: PMC7814505 DOI: 10.1016/j.kint.2020.07.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 06/12/2020] [Accepted: 07/09/2020] [Indexed: 02/06/2023]
Abstract
Delayed graft function due to transplant ischemia/reperfusion injury adversely affects up to 50% of deceased-donor kidney transplant recipients. However, key factors contributing to the severity of ischemia/reperfusion injury remain unclear. Here, using a clinically relevant mouse model of delayed graft function, we demonstrated that donor genetic background and kidney-intrinsic MyD88/Trif-dependent innate immunity were key determinants of delayed graft function. Functional deterioration of kidney grafts directly corresponded with the duration of cold ischemia time. The graft dysfunction became irreversible after cold ischemia time exceeded six hours. When cold ischemia time reached four hours, kidney grafts displayed histological features reflective of delayed graft function seen in clinical kidney transplantation. Notably, kidneys of B6 mice exhibited significantly more severe histological and functional impairment than kidneys of C3H or BALB/c mice, regardless of recipient strains or alloreactivities. Furthermore, allografts of B6 mice also showed an upregulation of IL-6, neutrophil gelatinase-associated lipocalin, and endoplasmic reticulum stress genes, as well as an increased influx of host neutrophils and memory CD8 T-cells. In contrast, donor MyD88/Trif deficiency inhibited neutrophil influx and decreased the expression of IL-6 and endoplasmic reticulum stress genes, along with improved graft function and prolonged allograft survival. Thus, kidney-intrinsic factors involving genetic characteristics and innate immunity serve as critical determinants of the severity of delayed graft function. This preclinical murine model allows for further investigations of the mechanisms underlying delayed graft function.
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Affiliation(s)
- Longhui Qiu
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Xingqiang Lai
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Organ Transplant Center, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jiao-Jing Wang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Xin Yi Yeap
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Shulin Han
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Feibo Zheng
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Charlie Lin
- Weinberg Art and Science College, Northwestern University, Evanston, Illinois, USA
| | - Zhuoli Zhang
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Daniele Procissi
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Deyu Fang
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Lin Li
- Department of Pathology and Laboratory Medicine, Cedars Sinai Medical Center, West Hollywood, California, USA
| | - Edward B Thorp
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Michael M Abecassis
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Yashpal S Kanwar
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Medicine (Nephrology and Hypertension), Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Zheng J Zhang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
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Hosgood SA, Hoff M, Nicholson ML. Treatment of transplant kidneys during machine perfusion. Transpl Int 2020; 34:224-232. [PMID: 32970886 DOI: 10.1111/tri.13751] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/24/2020] [Accepted: 09/15/2020] [Indexed: 12/11/2022]
Abstract
The increasing use of donation after circulatory death (DCD) and extended criteria donor (ECD) organs has raised awareness of the need to improve the quality of kidneys for transplantation. Treating kidneys during the preservation interval could improve early and long-term graft function and survival. Dynamic modes of preservation including hypothermic machine perfusion (HMP) and normothermic machine perfusion (NMP) may provide the functional platforms to treat these kidneys. Therapies in the field of regenerative medicine including cellular therapies and genetic modification and the application of biological agents targeting ischaemia reperfusion injury (IRI) and acute rejection are a growing area of research. This review reports on the application of cellular and gene manipulating therapies, nanoparticles, anti-inflammatory agents, anti-thrombolytic agents and monoclonal antibodies administered during HMP and NMP in experimental models. The review also reports on the clinical effectiveness of several biological agents administered during HMP. All of the experimental studies provide proof of principle that therapies can be successfully delivered during HMP and NMP. However, few have examined the effects after transplantation. Evidence for clinical application during HMP is sparse and only one study has demonstrated a beneficial effect on graft function. More investigation is needed to develop perfusion strategies and investigate the different experimental approaches.
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Affiliation(s)
- Sarah A Hosgood
- Department of Surgery, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Mekhola Hoff
- Department of Surgery, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Michael L Nicholson
- Department of Surgery, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
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Kawakita N, Toba H, Miyoshi K, Sakamoto S, Matsumoto D, Takashima M, Aoyama M, Inoue S, Morimoto M, Nishino T, Takizawa H, Tangoku A. Bronchioalveolar stem cells derived from mouse-induced pluripotent stem cells promote airway epithelium regeneration. Stem Cell Res Ther 2020; 11:430. [PMID: 33008488 PMCID: PMC7531137 DOI: 10.1186/s13287-020-01946-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 09/20/2020] [Indexed: 12/20/2022] Open
Abstract
Background Bronchioalveolar stem cells (BASCs) located at the bronchioalveolar-duct junction (BADJ) are stem cells residing in alveoli and terminal bronchioles that can self-renew and differentiate into alveolar type (AT)-1 cells, AT-2 cells, club cells, and ciliated cells. Following terminal-bronchiole injury, BASCs increase in number and promote repair. However, whether BASCs can be differentiated from mouse-induced pluripotent stem cells (iPSCs) remains unreported, and the therapeutic potential of such cells is unclear. We therefore sought to differentiate BASCs from iPSCs and examine their potential for use in the treatment of epithelial injury in terminal bronchioles. Methods BASCs were induced using a modified protocol for differentiating mouse iPSCs into AT-2 cells. Differentiated iPSCs were intratracheally transplanted into naphthalene-treated mice. The engraftment of BASCs into the BADJ and their subsequent ability to promote repair of injury to the airway epithelium were evaluated. Results Flow cytometric analysis revealed that BASCs represented ~ 7% of the cells obtained. Additionally, ultrastructural analysis of these iPSC-derived BASCs via transmission electron microscopy showed that the cells containing secretory granules harboured microvilli, as well as small and immature lamellar body-like structures. When the differentiated iPSCs were intratracheally transplanted in naphthalene-induced airway epithelium injury, transplanted BASCs were found to be engrafted in the BADJ epithelium and alveolar spaces for 14 days after transplantation and to maintain the BASC phenotype. Notably, repair of the terminal-bronchiole epithelium was markedly promoted after transplantation of the differentiated iPSCs. Conclusions Mouse iPSCs could be differentiated in vitro into cells that display a similar phenotype to BASCs. Given that the differentiated iPSCs promoted epithelial repair in the mouse model of naphthalene-induced airway epithelium injury, this method may serve as a basis for the development of treatments for terminal-bronchiole/alveolar-region disorders.
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Affiliation(s)
- Naoya Kawakita
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Hiroaki Toba
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan.
| | - Keiko Miyoshi
- Department of Molecular Biology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Shinichi Sakamoto
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Daisuke Matsumoto
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Mika Takashima
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Mariko Aoyama
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Seiya Inoue
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Masami Morimoto
- Department of Breast Surgery, Japanese Red Cross Kyoto Daiichi Hospital, Kyoto, Japan
| | - Takeshi Nishino
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Hiromitsu Takizawa
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Akira Tangoku
- Department of Thoracic and Endocrine Surgery and Oncology, Institute of Biomedical Sciences, The University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
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35
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Julovi SM, Sanganeria B, Minhas N, Ghimire K, Nankivell B, Rogers NM. Blocking thrombospondin-1 signaling via CD47 mitigates renal interstitial fibrosis. J Transl Med 2020; 100:1184-1196. [PMID: 32366943 DOI: 10.1038/s41374-020-0434-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/31/2020] [Accepted: 04/11/2020] [Indexed: 11/10/2022] Open
Abstract
Acute kidney injury triggers a complex cascade of molecular responses that can culminate in maladaptive repair and fibrosis. We have previously reported that the matrix protein thrombospondin-1 (TSP1), binding its high affinity its receptor CD47, promotes acute kidney injury. However, the role of this pathway in promoting fibrosis is less clear. Hypothesizing that limiting TSP1-CD47 signaling is protective against fibrosis, we interrogated this pathway in a mouse model of chronic ischemic kidney injury. Plasma and renal parenchymal expression of TSP1 in patients with chronic kidney disease was also assessed. We found that CD47-/- mice or wild-type mice treated with a CD47 blocking antibody showed clear amelioration of fibrotic histological changes compared to control animals. Wild-type mice showed upregulated TSP1 and pro-fibrotic markers which were significantly abrogated in CD47-/- and antibody-treated cohorts. Renal tubular epithelial cells isolated from WT mice showed robust upregulation of pro-fibrotic markers following hypoxic stress or exogenous TSP1, which was mitigated in CD47-/- cells. Patient sera showed a proportionate correlation between TSP1 levels and worsening glomerular filtration rate. Immunohistochemistry of human kidney tissue demonstrated tubular and glomerular matrix localization of TSP1 expression in patients with CKD. These data suggest that renal tubular epithelial cells contribute to fibrosis by activating TSP1-CD47 signaling, and point to CD47 as a potential target to limit fibrosis following ischemic injury.
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Affiliation(s)
- Sohel M Julovi
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Camperdown, NSW, Australia
| | - Barkha Sanganeria
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Camperdown, NSW, Australia
| | - Nikita Minhas
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Camperdown, NSW, Australia
| | - Kedar Ghimire
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Camperdown, NSW, Australia
| | - Brian Nankivell
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Camperdown, NSW, Australia.,Westmead Clinical Medical School, University of Sydney, Camperdown, NSW, Australia.,Renal Division, Westmead Hospital, Camperdown, NSW, Australia
| | - Natasha M Rogers
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Camperdown, NSW, Australia. .,Westmead Clinical Medical School, University of Sydney, Camperdown, NSW, Australia. .,Renal Division, Westmead Hospital, Camperdown, NSW, Australia. .,Department of Surgery, Thomas E. Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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36
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He Y, Sun X, Rong W, Yang R, Liang H, Qi Y, Li L, Zen K. CD47 is a negative regulator of intestinal epithelial cell self-renewal following DSS-induced experimental colitis. Sci Rep 2020; 10:10180. [PMID: 32576895 PMCID: PMC7311394 DOI: 10.1038/s41598-020-67152-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 06/04/2020] [Indexed: 02/06/2023] Open
Abstract
CD47 deficient mice are resistant to dextran sulfate sodium (DSS)-induced experimental colitis. The underlying mechanism, however, remains incompletely understood. In this study, we characterized the role of CD47 in modulating homeostasis of gastrointestinal tract. We found that CD47 expression in both human and mouse intestinal epithelium was upregulated in colitic condition compared to that under normal condition. In line with this, CD47 deficiency protected mice from DSS-induced colitis. Analysis based on both intestinal organoid and cultured cell assays showed that CD47 deficiency accelerated intestinal epithelial cell proliferation and migration. Mechanistically, western blot and functional assays indicated that CD47 deficiency promoting mouse intestinal epithelial cell proliferation and migration follow cell injury is likely through upregulating expression of four Yamanaka transcriptional factors Oct4, Sox2, Klf4 and c-Myc (OSKM in abbreviation). Our studies thus reveal CD47 as a negative regulator in intestinal epithelial cell renewal during colitis through downregulating OSKM transcriptional factors.
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Affiliation(s)
- Yueqin He
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Xinlei Sun
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Weiwei Rong
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Rong Yang
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Hongwei Liang
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China
| | - Ying Qi
- Department of Gastroenterology and Hepatology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Limin Li
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China.
- Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Nanjing University, Nanjing, Jiangsu, 210093, China.
| | - Ke Zen
- Nanjing University Advanced Institute of Life Sciences, Nanjing, China.
- Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, Nanjing University, Nanjing, Jiangsu, 210093, China.
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37
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Isenberg JS, Roberts DD. Thrombospondin-1 in maladaptive aging responses: a concept whose time has come. Am J Physiol Cell Physiol 2020; 319:C45-C63. [PMID: 32374675 DOI: 10.1152/ajpcell.00089.2020] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Numerous age-dependent alterations at the molecular, cellular, tissue and organ systems levels underlie the pathophysiology of aging. Herein, the focus is upon the secreted protein thrombospondin-1 (TSP1) as a promoter of aging and age-related diseases. TSP1 has several physiological functions in youth, including promoting neural synapse formation, mediating responses to ischemic and genotoxic stress, minimizing hemorrhage, limiting angiogenesis, and supporting wound healing. These acute functions of TSP1 generally require only transient expression of the protein. However, accumulating basic and clinical data reinforce the view that chronic diseases of aging are associated with accumulation of TSP1 in the extracellular matrix, which is a significant maladaptive contributor to the aging process. Identification of the relevant cell types that chronically produce and respond to TSP1 and the molecular mechanisms that mediate the resulting maladaptive responses could direct the development of therapeutic agents to delay or revert age-associated maladies.
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Affiliation(s)
| | - David D Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
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38
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Hameed AM, Lu DB, Burns H, Byrne N, Chew YV, Julovi S, Ghimire K, Zanjani NT, P'ng CH, Meijles D, Dervish S, Matthews R, Miraziz R, O'Grady G, Yuen L, Pleass HC, Rogers NM, Hawthorne WJ. Pharmacologic targeting of renal ischemia-reperfusion injury using a normothermic machine perfusion platform. Sci Rep 2020; 10:6930. [PMID: 32332767 PMCID: PMC7181764 DOI: 10.1038/s41598-020-63687-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 03/27/2020] [Indexed: 01/09/2023] Open
Abstract
Normothermic machine perfusion (NMP) is an emerging modality for kidney preservation prior to transplantation. NMP may allow directed pharmacomodulation of renal ischemia-reperfusion injury (IRI) without the need for systemic donor/recipient therapies. Three proven anti-IRI agents not in widespread clinical use, CD47-blocking antibody (αCD47Ab), soluble complement receptor 1 (sCR1), and recombinant thrombomodulin (rTM), were compared in a murine model of kidney IRI. The most effective agent was then utilized in a custom NMP circuit for the treatment of isolated porcine kidneys, ascertaining the impact of the drug on perfusion and IRI-related parameters. αCD47Ab conferred the greatest protection against IRI in mice after 24 hours. αCD47Ab was therefore chosen as the candidate agent for addition to the NMP circuit. CD47 receptor binding was demonstrated by immunofluorescence. Renal perfusion/flow improved with CD47 blockade, with a corresponding reduction in oxidative stress and histologic damage compared to untreated NMP kidneys. Tubular and glomerular functional parameters were not significantly impacted by αCD47Ab treatment during NMP. In a murine renal IRI model, αCD47Ab was confirmed as a superior anti-IRI agent compared to therapies targeting other pathways. NMP enabled effective, direct delivery of this drug to porcine kidneys, although further efficacy needs to be proven in the transplantation setting.
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Affiliation(s)
- Ahmer M Hameed
- Department of Surgery, Westmead Hospital, Sydney, Australia
- Westmead Institute for Medical Research, Sydney, Australia
- Sydney Medical School, University of Sydney, Sydney, Australia
| | - David B Lu
- Westmead Institute for Medical Research, Sydney, Australia
| | - Heather Burns
- Westmead Institute for Medical Research, Sydney, Australia
| | - Nicole Byrne
- Westmead Institute for Medical Research, Sydney, Australia
| | - Yi Vee Chew
- Westmead Institute for Medical Research, Sydney, Australia
| | - Sohel Julovi
- Westmead Institute for Medical Research, Sydney, Australia
| | - Kedar Ghimire
- Westmead Institute for Medical Research, Sydney, Australia
| | | | - Chow H P'ng
- Institute for Clinical Pathology and Medical Research, Westmead Hospital, Sydney, Australia
| | | | - Suat Dervish
- Westmead Institute for Medical Research, Sydney, Australia
| | - Ross Matthews
- Department of Animal Care, Westmead Hospital, Sydney, Australia
| | - Ray Miraziz
- Department of Anesthesia, Westmead Hospital, Sydney, Australia
| | - Greg O'Grady
- Department of Surgery, The University of Auckland, Auckland, New Zealand
| | - Lawrence Yuen
- Department of Surgery, Westmead Hospital, Sydney, Australia
- Sydney Medical School, University of Sydney, Sydney, Australia
| | - Henry C Pleass
- Department of Surgery, Westmead Hospital, Sydney, Australia
- Sydney Medical School, University of Sydney, Sydney, Australia
| | - Natasha M Rogers
- Westmead Institute for Medical Research, Sydney, Australia.
- Sydney Medical School, University of Sydney, Sydney, Australia.
- Department of Transplant/Renal Medicine, Westmead Hospital, Sydney, Australia.
| | - Wayne J Hawthorne
- Department of Surgery, Westmead Hospital, Sydney, Australia.
- Westmead Institute for Medical Research, Sydney, Australia.
- Sydney Medical School, University of Sydney, Sydney, Australia.
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Geng X, Song N, Zhao S, Xu J, Liu Y, Fang Y, Liang M, Xu X, Ding X. LncRNA GAS5 promotes apoptosis as a competing endogenous RNA for miR-21 via thrombospondin 1 in ischemic AKI. Cell Death Discov 2020; 6:19. [PMID: 32257391 PMCID: PMC7118150 DOI: 10.1038/s41420-020-0253-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/16/2020] [Accepted: 01/27/2020] [Indexed: 01/04/2023] Open
Abstract
Mounting evidence has indicated that long noncoding RNAs (lncRNAs) and microRNAs (miRNAs) played important roles in renal ischemia/reperfusion (I/R) injury. However, the involvement of lncRNA growth arrest specific 5 (GAS5) in acute kidney injury (AKI) remained largely unexplored. This study aimed to determine possible mechanisms of GAS5 in the renal I/R process. We found that GAS5, noticeably upregulated by renal I/R injury, was further suppressed by delayed IPC while knockdown of miR-21 in vivo before IPC could significantly increased the GAS5 levels. Concurrently, TSP-1 was negatively regulated by miR-21 in vivo and vitro. Additionally, Reciprocal repression of GAS5 and miR-21 was identified. Knockdown of miR-21 in H6R0.5 treated HK-2 cells promoted apoptosis. Co-transfection of miR-21 mimic and pcDNA-GAS5 or pcDNA-Vector were performed, results of which showed that inhibition of miR-21 on TSP-1 could be rescued by overexpression of GAS5. This study suggested that GAS5 facilitated apoptosis by competitively sponging miR-21, which negatively regulated TSP-1 in renal I/R injury. This novel regulatory axis could act as a therapeutic target for AKI in the future.
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Affiliation(s)
- Xuemei Geng
- Department of Nephrology, Zhongshan Hospital, Fudan University; Shanghai Institute of Kidney and Dialysis; Shanghai Key Laboratory of Kidney and Blood Purification; Shanghai Medical Center of Kidney Disease, Shanghai, China
| | - Nana Song
- Department of Nephrology, Zhongshan Hospital, Fudan University; Shanghai Institute of Kidney and Dialysis; Shanghai Key Laboratory of Kidney and Blood Purification; Shanghai Medical Center of Kidney Disease, Shanghai, China
| | - Shuan Zhao
- Department of Nephrology, Zhongshan Hospital, Fudan University; Shanghai Institute of Kidney and Dialysis; Shanghai Key Laboratory of Kidney and Blood Purification; Shanghai Medical Center of Kidney Disease, Shanghai, China
| | - Jiarui Xu
- Department of Nephrology, Zhongshan Hospital, Fudan University; Shanghai Institute of Kidney and Dialysis; Shanghai Key Laboratory of Kidney and Blood Purification; Shanghai Medical Center of Kidney Disease, Shanghai, China
| | - Yong Liu
- Department of Physiology and Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee, WI USA
| | - Yi Fang
- Department of Nephrology, Zhongshan Hospital, Fudan University; Shanghai Institute of Kidney and Dialysis; Shanghai Key Laboratory of Kidney and Blood Purification; Shanghai Medical Center of Kidney Disease, Shanghai, China
| | - Mingyu Liang
- Department of Physiology and Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee, WI USA
| | - Xialian Xu
- Department of Nephrology, Zhongshan Hospital, Fudan University; Shanghai Institute of Kidney and Dialysis; Shanghai Key Laboratory of Kidney and Blood Purification; Shanghai Medical Center of Kidney Disease, Shanghai, China
| | - Xiaoqiang Ding
- Department of Nephrology, Zhongshan Hospital, Fudan University; Shanghai Institute of Kidney and Dialysis; Shanghai Key Laboratory of Kidney and Blood Purification; Shanghai Medical Center of Kidney Disease, Shanghai, China
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40
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Liu L, Deng Y, Cai Y, Lu P, Guo Y, Zhang C, Li Q, Zhang T, Han M, Xu G. Ablation of Gsa impairs renal tubule proliferation after injury via CDK2/cyclin E. Am J Physiol Renal Physiol 2020; 318:F793-F803. [PMID: 32036696 DOI: 10.1152/ajprenal.00367.2019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Acute kidney injury has a high global morbidity associated with an increased risk of death and chronic kidney disease. Renal tubular epithelial cell regeneration following injury may be a decisive factor in renal repair or the progression of acute kidney injury to chronic kidney disease, but the underlying mechanism of abnormal renal tubular repair remains unclear. In the present study, we investigated the role of heterotrimeric G stimulatory protein α-subunit (Gsa) in renal tubular epithelial cell regeneration. We generated renal tubule epithelium-specific Gsa knockout (GsaKspKO) mice to show the essential role of Gsa in renal tubular epithelial cell regeneration in two AKI models: acute aristolochic acid nephropathy (AAN) and unilateral ischemia-reperfusion injury (UIRI). GsaKspKO mice developed more severe renal impairment after AAN and UIRI, higher serum creatinine levels, and more substantial tubular necrosis than wild-type mice. More importantly, Gsa inactivation impaired renal tubular epithelial cell proliferation by reducing bromodeoxyuridine+ cell numbers in the AAN model and inhibiting cyclin-dependent kinase 2/cyclin E1 expression in the UIRI model. This reduced proliferation was further supported in vitro with Gsa-targeting siRNA. Downregulation of Gsa inhibited tubular epithelial cell proliferation in HK-2 and mIMCD-3 cells. Furthermore, Gsa downregulation inhibited cyclin-dependent kinase 2/cyclin E1 expression, which was dependent on the Raf-MEK-ERK signaling pathway. In conclusion, Gsa is required for tubular epithelial cell regeneration during kidney repair after AKI. Loss of Gsa impairs renal tubular epithelial cell regeneration by blocking the Raf-MEK-ERK pathway.
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Affiliation(s)
- Lele Liu
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuanjun Deng
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yang Cai
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pingfan Lu
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yiyan Guo
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chunjiang Zhang
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian Li
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tianjing Zhang
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Min Han
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Gang Xu
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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41
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Isenberg JS, Roberts DD. The role of CD47 in pathogenesis and treatment of renal ischemia reperfusion injury. Pediatr Nephrol 2019; 34:2479-2494. [PMID: 30392076 PMCID: PMC6677644 DOI: 10.1007/s00467-018-4123-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/01/2018] [Accepted: 10/18/2018] [Indexed: 01/05/2023]
Abstract
Ischemia reperfusion (IR) injury is a process defined by the temporary loss of blood flow and tissue perfusion followed later by restoration of the same. Brief periods of IR can be tolerated with little permanent deficit, but sensitivity varies for different target cells and tissues. Ischemia reperfusion injuries have multiple causes including peripheral vascular disease and surgical interventions that disrupt soft tissue and organ perfusion as occurs in general and reconstructive surgery. Ischemia reperfusion injury is especially prominent in organ transplantation where substantial effort has been focused on protecting the transplanted organ from the consequences of IR. A number of factors mediate IR injury including the production of reactive oxygen species and inflammatory cell infiltration and activation. In the kidney, IR injury is a major cause of acute injury and secondary loss of renal function. Transplant-initiated renal IR is also a stimulus for innate and adaptive immune-mediated transplant dysfunction. The cell surface molecule CD47 negatively modulates cell and tissue responses to stress through limitation of specific homeostatic pathways and initiation of cell death pathways. Herein, a summary of the maladaptive activities of renal CD47 will be considered as well as the possible therapeutic benefit of interfering with CD47 to limit renal IR.
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Affiliation(s)
- Jeffrey S. Isenberg
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - David D. Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, Corresponding author: David D. Roberts, , 301-480-4368
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42
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CD47 Deficiency Attenuates Isoproterenol-Induced Cardiac Remodeling in Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:7121763. [PMID: 31827695 PMCID: PMC6885801 DOI: 10.1155/2019/7121763] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Accepted: 09/11/2019] [Indexed: 12/11/2022]
Abstract
In this study, we investigated whether CD47 deficiency attenuates isoproterenol- (ISO-) induced cardiac remodeling in mice. Cardiac remodeling was induced by intraperitoneal (i.p.) injection of ISO (60 mg·kg−1·d−1 in 100 μl of sterile normal saline) daily for 14 days and was confirmed by increased levels of lactate dehydrogenase (LDH) and creatine kinase MB (CK-MB), increased heart weight to body weight (HW/BW) ratios, and visible cardiac fibrosis. Apoptosis was evaluated by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) staining. Levels of malondialdehyde (MDA) and reactive oxygen species (ROS) were found to be significantly higher in the ISO group than in the control group, while superoxide dismutase (SOD) levels were suppressed in the ISO group. However, CD47 knockout significantly limited ISO-induced increases in LDH, CK-MB, and HW/BW ratios, cardiac fibrosis, oxidative stress, and apoptosis in the heart. In addition, CD47 deficiency also increased p-AMPK and LAMP2 expression and decreased HDAC3, cleaved Caspase-3, cleaved Caspase-9, LC3II, and p62 expression in cardiac tissues. In conclusion, CD47 deficiency reduced i.p. ISO-induced cardiac remodeling probably by inhibiting the HDAC3 pathway, improving AMPK signaling and autophagy flux, and rescuing autophagic clearance.
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43
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Murphy-Ullrich JE. Thrombospondin 1 and Its Diverse Roles as a Regulator of Extracellular Matrix in Fibrotic Disease. J Histochem Cytochem 2019; 67:683-699. [PMID: 31116066 PMCID: PMC6713974 DOI: 10.1369/0022155419851103] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/26/2019] [Indexed: 01/06/2023] Open
Abstract
Thrombospondin 1 (TSP1) is a matricellular extracellular matrix protein that has diverse roles in regulating cellular processes important for the pathogenesis of fibrotic diseases. We will present evidence for the importance of TSP1 control of latent transforming growth factor beta activation in renal fibrosis with an emphasis on diabetic nephropathy. Other functions of TSP1 that affect renal fibrosis, including regulation of inflammation and capillary density, will be addressed. Emerging roles for TSP1 N-terminal domain regulation of collagen matrix assembly, direct effects of TSP1-collagen binding, and intracellular functions of TSP1 in mediating endoplasmic reticulum stress responses in extracellular matrix remodeling and fibrosis, which could potentially affect renal fibrogenesis, will also be discussed. Finally, we will address possible strategies for targeting TSP1 functions to treat fibrotic renal disease.
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Affiliation(s)
- Joanne E Murphy-Ullrich
- Departments of Pathology, Cell Developmental and Integrative Biology, and Ophthalmology, The University of Alabama at Birmingham, Birmingham, AL
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44
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El-Rashid M, Ghimire K, Sanganeria B, Lu B, Rogers NM. CD47 limits autophagy to promote acute kidney injury. FASEB J 2019; 33:12735-12749. [PMID: 31480863 DOI: 10.1096/fj.201900120rr] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Acute kidney injury (AKI) initiates a complex pathophysiological cascade leading to epithelial cell death. Recent studies identify autophagy, a key intracellular process that degrades cytoplasmic constituents, as protective against AKI. We have previously reported that the protein thrombospondin-1 and its receptor CD47 are induced in AKI; however, the mechanism underlying their regulation of injury is unknown. Here, we investigated whether CD47 signaling affects autophagy to regulate AKI. Wild-type (WT) and CD47-/- mice were challenged with renal ischemia-reperfusion injury. All animals underwent analysis of renal function and biomolecular phenotyping. CD47-/- mice were resistant to AKI, with decreased serum creatinine and ameliorated histologic changes compared with WT animals. These mice also displayed increased abundance of key autophagy genes, including autophagy-related gene (Atg)5, Atg7, beclin-1, and microtubule-associated proteins 1A/1B light chain 3 (LC3) at baseline and post-AKI, which were significantly reduced in WT mice. Changes in protein expression correlated with increased autophagosome and autolysosome formation in renal tubular epithelial cells (RTECs). In mouse kidney transplantation, treatment with a CD47-blocking antibody that improved function was associated with increased autophagy compared with control mice. Primary isolated RTECs from CD47-/- mice demonstrated increased basal expression of several autophagy components that was preserved under hypoxic stress. These data suggest that activated CD47 promotes AKI through inhibition of autophagy and point to CD47 as a target to preserve renal function following injury.-El-Rashid, M., Ghimire, K., Sanganeria, B., Lu, B., Rogers, N. M. CD47 limits autophagy to promote acute kidney injury.
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Affiliation(s)
- Maryam El-Rashid
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Kedar Ghimire
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Barkha Sanganeria
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Bo Lu
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Natasha M Rogers
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia.,Renal Division, Westmead Hospital, Westmead, New South Wales, Australia.,Westmead Clinical Medical School, University of Sydney, Camperdown, New South Wales, Australia.,Department of Surgery, Thomas E. Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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45
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c-Myc promotes tubular cell apoptosis in ischemia-reperfusion-induced renal injury by negatively regulating c-FLIP and enhancing FasL/Fas-mediated apoptosis pathway. Acta Pharmacol Sin 2019; 40:1058-1066. [PMID: 30593588 DOI: 10.1038/s41401-018-0201-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/29/2018] [Indexed: 12/16/2022] Open
Abstract
c-Myc plays an important role in cell proliferation, differentiation, and cell apoptosis. FasL/Fas pathway is a key regulator of cell apoptosis. This study was aimed to investigate the effects of c-Myc on the FasL/Fas pathway in ischemia-reperfusion (I/R)-induced renal injury. Rats were objected to bilateral renal ischemia for 60 min and reperfused for 24 or 48 h. NRK-52E cells were treated with hypoxia-reoxygenation (H/R) or FasL. Immunohistochemistry was used to identify the distribution of c-Myc. Cell apoptosis was assessed by TUNEL staining. Ad-c-Myc and recombinant pcDAN 3.0 were used to overexpress c-Myc and c-FLIP, respectively. ChIP assay and luciferase assay were used to detect the binding of c-Myc to c-FLIP promoter. In I/R rats, c-Myc was increased significantly and mainly located in renal tubular epithelial cells; meanwhile, c-FLIP was decreased, cleaved caspase-8, cleaved caspase-3 and TUNEL-positive staining cells were increased. Treatment of I/R rats with c-Myc inhibitor 10058-F4 significantly attenuated the decrease in c-FLIP, the increase in cleaved caspase-8, cleaved caspase-3, TUNEL-positive cells, Scr and BUN in I/R rats. In NRK-52E cells, hypoxia and reoxygen induced the increase in c-Myc and decrease in c-FLIP. ChIP and luciferase assay results indicated that c-Myc binds to the promoter region of c-FLIP gene. Overexpression of c-Myc markedly decreased c-FLIP. Overexpression of c-FLIP inhibited the increase in cleaved caspase-8 and caspase-3 induced by FasL. Data indicated that c-Myc is increased in kidneys of I/R rats and negatively regulates the expression of c-FLIP, then enhanced FasL-induced cell apoptosis in I/R stress.
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46
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Ghimire K, Chiba T, Minhas N, Meijles DN, Lu B, O'Connell P, Rogers NM. Deficiency in SIRP-α cytoplasmic recruitment confers protection from acute kidney injury. FASEB J 2019; 33:11528-11540. [PMID: 31370677 DOI: 10.1096/fj.201900583r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Acute kidney injury (AKI) remains an important source of progressive chronic kidney injury. Loss of renal blood flow with subsequent restoration, termed ischemia reperfusion (IR), is a common cause of AKI. The cell surface receptor signal regulatory protein α (SIRP-α) is expressed on macrophages and limits inflammation and phagocytosis. SIRP-α has recently been found to have wider cell-based expression and play a role in renal IR. We have explored this in a genetic model of deficient SIRP-α signaling. Mice lacking SIRP-α cytoplasmic signaling (SIRP-αmut) and wild-type (WT) littermate controls underwent renal ischemia and reperfusion. Chimeric mice transplanted with WT or SIRP-αmut bone marrow were similarly challenged following engraftment. Molecular and immunohistochemical analysis of renal function, tissue damage, and key molecular targets was performed. SIRP-αmut mice were protected from renal IR compared with WT animals, demonstrating improved serum creatinine, less histologic damage, reduced proinflammatory cytokine production, and diminished production of reactive oxygen species (ROS). Resistance to renal IR in SIRP-αmut occurred alongside down-regulation of CD47 and thrombospondin-1, which are known to exert SIRP-α crosstalk and also promote IR. In chimeric mice, lack of SIRP-α signaling conferred protection to IR regardless of the genotype of circulating cells. Renal tubular epithelial cells from SIRP-αmut mice produced fewer ROS and proinflammatory cytokines in vitro. These results identify parenchymal SIRP-α as an independent driver of IR-mediated AKI and a potential therapeutic target.-Ghimire, K., Chiba, T., Minhas, N., Meijles, D. N., Lu, B., O'Connell, P., Rogers, N. M. Deficiency in SIRP-α cytoplasmic recruitment confers protection from acute kidney injury.
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Affiliation(s)
- Kedar Ghimire
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia.,Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Takuto Chiba
- Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Nikita Minhas
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Daniel N Meijles
- Molecular and Clinical Sciences Research Institute, St. George's, University of London, London, United Kingdom
| | - Bo Lu
- Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Philip O'Connell
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia.,Department of Medicine, Westmead Clinical School, University of Sydney, Sydney, New South Wales, Australia
| | - Natasha M Rogers
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, Westmead, New South Wales, Australia.,Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,Department of Medicine, Westmead Clinical School, University of Sydney, Sydney, New South Wales, Australia.,Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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47
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Gcm1 is involved in cell proliferation and fibrosis during kidney regeneration after ischemia-reperfusion injury. Sci Rep 2019; 9:7883. [PMID: 31133638 PMCID: PMC6536531 DOI: 10.1038/s41598-019-44161-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 05/10/2019] [Indexed: 12/27/2022] Open
Abstract
In acute kidney injury (AKI), the S3 segment of the proximal tubule is particularly damaged, as it is most vulnerable to ischemia. However, this region is also involved in renal tubular regeneration. To deeply understand the mechanism of the repair process after ischemic injury in AKI, we focused on glial cells missing 1 (Gcm1), which is one of the genes expressed in the S3 segment. Gcm1 is essential for the development of the placenta, and Gcm1 knockout (KO) is embryonically lethal. Thus, the function of Gcm1 in the kidney has not been analyzed yet. We analyzed the function of Gcm1 in the kidney by specifically knocking out Gcm1 in the kidney. We created an ischemia-reperfusion injury (IRI) model to observe the repair process after AKI. We found that Gcm1 expression was transiently increased during the recovery phase of IRI. In Gcm1 conditional KO mice, during the recovery phase of IRI, tubular cell proliferation reduced and transforming growth factor-β1 expression was downregulated resulting in a reduction in fibrosis. In vitro, Gcm1 overexpression promoted cell proliferation and upregulated TGF-β1 expression. These findings indicate that Gcm1 is involved in the mechanisms of fibrosis and cell proliferation after ischemic injury of the kidney.
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48
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Li Y, Zhao K, Zong P, Fu H, Zheng Y, Bao D, Yin Y, Chen Q, Lu L, Dai Y, Hou D, Kong X. CD47 deficiency protects cardiomyocytes against hypoxia/reoxygenation injury by rescuing autophagic clearance. Mol Med Rep 2019; 19:5453-5463. [PMID: 31059044 DOI: 10.3892/mmr.2019.10199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 04/04/2019] [Indexed: 11/06/2022] Open
Abstract
To assess the effect of cluster of differentiation (CD47) downregulation on autophagy in hypoxia/reoxygenation (H/R)‑treated H9c2 cardiomyocytes. H9c2 cells were maintained in normoxic conditions (95% air, 5% CO2, 37˚C) without CD47 antibodies, Si‑CD47 or chloroquine (CQ) treatment; H9c2 cells in the H/R group were subjected to 24 h of hypoxia (1% O2, 94% N2, 5% CO2, 37˚C) followed by 12 h of reoxygenation (95% air, 5% CO2, 37˚C). All assays were controlled, triplicated and repeated on three separately initiated cultures. The biochemical parameters in the medium supernatant were measured to evaluate the oxidative stress in cardiomyocytes. The Annexin V‑fluorescein isothiocyanate assay was used to detect the apoptotic rate in the H9c2 cells. Transmission electron microscope, immunofluorescent staining and western blot analysis were performed to detect the effect of the CD47 antibody on autophagic flux in H/R‑treated H9c2 cardiomyocytes. The cardiomyocytic oxidative stress and apoptotic rate decreased and autophagic clearance increased after CD47 downregulation. H/R triggered cell autophagy, autophagosome accumulation and apoptosis in H9c2 cell lines. However, these effects can be attenuated by CD47 downregulation. This study demonstrates its clinical implications in ischemia/reperfusion injury treatment.
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Affiliation(s)
- Yong Li
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Kun Zhao
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Pengyu Zong
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Heling Fu
- Key Laboratory of The Model Animal Research, Animal Core Facility of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yuan Zheng
- Key Laboratory of The Model Animal Research, Animal Core Facility of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Dan Bao
- Key Laboratory of The Model Animal Research, Animal Core Facility of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yuan Yin
- Key Laboratory of The Model Animal Research, Animal Core Facility of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Qin Chen
- Key Laboratory of The Model Animal Research, Animal Core Facility of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Lu Lu
- Key Laboratory of The Model Animal Research, Animal Core Facility of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Youjin Dai
- Key Laboratory of The Model Animal Research, Animal Core Facility of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Daorong Hou
- Key Laboratory of The Model Animal Research, Animal Core Facility of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Xiangqing Kong
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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49
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Yin J, Xu R, Wei J, Zhang S. The protective effect of glutaredoxin 1/DJ-1/HSP70 signaling in renal tubular epithelial cells injury induced by ischemia. Life Sci 2019; 223:88-94. [PMID: 30858124 DOI: 10.1016/j.lfs.2019.03.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 03/07/2019] [Indexed: 12/20/2022]
Abstract
AIMS Gluaredoxin1 (GRX1) is an important protein of the cellular antioxidant defense system, but its role in renal epithelial cell injury caused by ischemia remains unclear. In this study, we aimed to gain insight into the role of GRX1 in HK-2 cells with oxygen glucose deprivation (OGD) injury, which served as an in vitro cell model of renal epithelial cell ischemic injury. We investigated the underlying regulation of GRX1, DJ-1, and HSP70 as well as the role of the GRX1/DJ-1/HSP70 signaling pathway in this model. MATERIALS AND METHODS The protein and mRNA expressions were measured by Western blot and qRT-PCR assays, respectively. GRX1 was overexpressed by transfection of pcDNA.3.1-GRX1 and DJ-1 was inhibited by transfection with DJ-1 siRNA. Cell apoptosis, caspase-3 activity, lactate dehydrogenase (LDH) leakage, or superoxide dismutase (SOD) content was tested by the related detection kit. Reactive oxygen species (ROS) level was detected via carboxy-H2DCF-DA. KEY FINDINGS We found that GRX1 was distinctly down-regulated in HK-2 cells after incubation under the OGD condition. GRX1 overexpression markedly constrained cell apoptosis, caspase-3 activity, LDH leakage, and the ROS level, while SOD content was elevated. GRX1 up-regulation increased DJ-1 and HSP70 protein expression, while DJ-1 inhibition significantly offset the effect of GRX1 overexpression on HSP70, indicating that GRX1 could regulate HSP70 via control of DJ-1. Moreover, we observed that HSP70 inhibition removed the constraints imposed by GRX1 overexpression on ROS level, LDH leakage, and caspase-3 activity. SIGNIFICANCE Overall, this study showed that GRX1 minimizes cell injury and apoptosis in HK-2 cells under OGD conditions via regulation of DJ-1 and HSP70 expression.
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Affiliation(s)
- Jian Yin
- Department of Vascular Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Ruisi Xu
- Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Jun Wei
- Department of Pharmacology Base, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Siqi Zhang
- Department of Nephrology, China-Japan Union Hospital of Jilin University, Changchun 130033, China.
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50
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Rictor deficiency in dendritic cells exacerbates acute kidney injury. Kidney Int 2018; 94:951-963. [PMID: 30190173 DOI: 10.1016/j.kint.2018.06.010] [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: 11/21/2017] [Revised: 05/10/2018] [Accepted: 06/07/2018] [Indexed: 11/20/2022]
Abstract
Dendritic cells (DCs) are critical initiators of innate immunity in the kidney and orchestrate inflammation following ischemia-reperfusion injury. The role of the mammalian/mechanistic target of rapamycin (mTOR) in the pathophysiology of renal ischemia-reperfusion injury has been characterized. However, the influence of DC-based alterations in mTOR signaling is unknown. To address this, bone marrow-derived mTORC2-deficient (Rictor-/-) DCs underwent hypoxia-reoxygenation and then analysis by flow cytometry. Adoptive transfer of wild-type or Rictor-/- DC to C57BL/6 mice followed by unilateral or bilateral renal ischemia-reperfusion injury (20 min ischemia) was used to assess their in vivo migratory capacity and influence on tissue injury. Age-matched male DC-specific Rictor-/- mice or littermate controls underwent bilateral renal ischemia-reperfusion, followed by assessment of renal function, histopathology, and biomolecular and cell infiltration analysis. Rictor-/- DCs expressed more costimulatory CD80/CD86 but less coinhibitory programmed death ligand 1 (PDL1), a pattern that was enhanced by hypoxia-reoxygenation. They also demonstrated enhanced migration to the injured kidney and induced greater tissue damage. Following ischemia-reperfusion, Rictor-/- DC mice developed higher serum creatinine levels, more severe histological damage, and greater proinflammatory cytokine production compared to littermate controls. Additionally, a greater influx of both neutrophils and T cells was seen in Rictor-/- DC mice, along with CD11c+MHCII+CD11bhiF4/80+ renal DC, that expressed more CD86 but less PDL1. Thus, DC-targeted elimination of Rictor enhances inflammation and migratory responses to the injured kidney, highlighting the regulatory roles of both DCs and Rictor in the pathophysiology of acute kidney injury.
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