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Park SI, Yu U, Oh WS, Ryu SW, Son S, Lee S, Baek H, Park JI. Serum and urinary biomarkers of vancomycin-induced acute kidney injury: A prospective, observational analysis. Medicine (Baltimore) 2024; 103:e39202. [PMID: 39121317 PMCID: PMC11315484 DOI: 10.1097/md.0000000000039202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Accepted: 07/16/2024] [Indexed: 08/11/2024] Open
Abstract
Vancomycin, a first-line drug for treating methicillin-resistant Staphylococcus aureus infections, is associated with acute kidney injury (AKI). This study involved an evaluation of biomarkers for AKI detection and their comparison with traditional serum creatinine (SCr). We prospectively enrolled patients scheduled to receive intravenous vancomycin for methicillin-resistant S aureus infection. Blood samples for pharmacokinetic assessment and SCr and cystatin C (CysC) measurements were collected at baseline and on days 3, 7, and 10 from the initiation of vancomycin administration (day 1). Urinary biomarkers, including kidney injury molecule 1 (KIM-1), neutrophil gelatinase-associated lipocalin, and clusterin, were collected from days 1 to 7 and adjusted for urinary creatinine levels. The estimated glomerular filtration rate (eGFR) was calculated using the Chronic Kidney Disease Epidemiology Collaboration equation. Of the 42 patients, 6 experienced vancomycin-induced AKI. On day 7, the change from baseline eGFR using CysC (ΔeGFRCysC) showed a stronger correlation with vancomycin area under the curve (r = -0.634, P < .001) than that using SCr (ΔeGFRSCr; r = -0.437, P = .020). ΔeGFRSCr showed no significant correlation with vancomycin pharmacokinetic in patients with body mass index ≥23. The median (interquartile range) level of KIM-1 (μg/mg) was significantly higher in the AKI group (0.006 [0.005-0.008]) than in the non-AKI group (0.004 [0.001-0.005]) (P = .039, Mann-Whitney U test), with area under the receiver operating characteristic curve (95% confidence interval) of 0.788 (0.587-0.990). Serum CysC, particularly in overweight individuals or those with obesity, along with urinary KIM-1 are important predictors of vancomycin-induced AKI. These results may aid in selecting better biomarkers than traditional SCr for detecting vancomycin-induced AKI.
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Affiliation(s)
- Sang-In Park
- Department of Pharmacology, College of Medicine, Kangwon National University, Chuncheon, Republic of Korea
- Biomedical Research Institute, Kangwon National University Hospital, Chuncheon, Republic of Korea
| | - Uijeong Yu
- Department of Pharmacology, College of Medicine, Kangwon National University, Chuncheon, Republic of Korea
| | - Won Sup Oh
- Department of Internal Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Republic of Korea
| | - Sook Won Ryu
- Department of Laboratory Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Republic of Korea
| | - Seongmin Son
- Department of Internal Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Republic of Korea
| | - Sunhwa Lee
- Department of Internal Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Republic of Korea
| | - Hyunjeong Baek
- Department of Internal Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Republic of Korea
| | - Ji In Park
- Department of Internal Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Republic of Korea
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Valencia LJ, Tseng M, Chu ML, Yu L, Adedeji AO, Kiyota T. Zoledronic acid and ibandronate-induced nephrotoxicity in 2D and 3D proximal tubule cells derived from human and rat. Toxicol Sci 2024; 198:86-100. [PMID: 38059598 DOI: 10.1093/toxsci/kfad123] [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] [Indexed: 12/08/2023] Open
Abstract
Drug-induced proximal tubule (PT) injury remains a serious safety concern throughout drug development. Traditional in vitro 2-dimensional (2D) and preclinical in vivo models often fail to predict drug-related injuries presented in clinical trials. Various 3-dimensional (3D) microphysiological systems (MPSs) have been developed to mimic physiologically relevant properties, enabling them to be more predictive toward nephrotoxicity. To explore the capabilities of an MPS across species, we compared cytotoxicity in hRPTEC/TERT1s and rat primary proximal tubular epithelial cells (rPPTECs) following exposure to zoledronic acid and ibandronate (62.5-500 µM), and antibiotic polymyxin B (PMB) (50 and 250 µM, respectively). For comparison, we investigated cytotoxicity using 2D cultured hRPTEC/TERT1s and rPPTECs following exposure to the same drugs, including overlapping concentrations, as their 3D counterparts. Regardless of the in vitro model, bisphosphonate-exposed rPPTECs exhibited cytotoxicity quicker than hRPTEC/TERT1s. PMB was less sensitive toward nephrotoxicity in rPPTECs than hRPTEC/TERT1s, demonstrating differences in species sensitivity within both 3D and 2D models. Generally, 2D cultured cells experienced faster drug-induced cytotoxicity compared to the MPSs, suggesting that MPSs can be advantageous for longer-term drug-exposure studies, if warranted. Furthermore, ibandronate-exposed hRPTEC/TERT1s and rPPTECs produced higher levels of inflammatory and kidney injury biomarkers compared to zoledronic acid, indicating that ibandronate induces acute kidney injury, but also a potential protective response since ibandronate is less toxic than zoledronic acid. Our study suggests that the MPS model can be used for preclinical screening of compounds prior to animal studies and human clinical trials.
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Affiliation(s)
- Leslie J Valencia
- Investigative Toxicology, Department of Safety Assessment, Genentech Inc., South San Francisco, California 94080, USA
- Pathology, Department of Safety Assessment, Genentech Inc., South San Francisco, California 94080, USA
| | - Min Tseng
- Investigative Toxicology, Department of Safety Assessment, Genentech Inc., South San Francisco, California 94080, USA
| | - Mei-Lan Chu
- Pathology, Department of Safety Assessment, Genentech Inc., South San Francisco, California 94080, USA
| | - Lanlan Yu
- Investigative Toxicology, Department of Safety Assessment, Genentech Inc., South San Francisco, California 94080, USA
| | - Adeyemi O Adedeji
- Pathology, Department of Safety Assessment, Genentech Inc., South San Francisco, California 94080, USA
| | - Tomomi Kiyota
- Investigative Toxicology, Department of Safety Assessment, Genentech Inc., South San Francisco, California 94080, USA
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Kostopoulou E, Kalavrizioti D, Davoulou P, Papachristou E, Sinopidis X, Fouzas S, Dassios T, Gkentzi D, Kyriakou SI, Karatza A, Dimitriou G, Goumenos D, Spiliotis BE, Plotas P, Papasotiriou M. Monocyte Chemoattractant Protein-1 (MCP-1), Activin-A and Clusterin in Children and Adolescents with Obesity or Type-1 Diabetes Mellitus. Diagnostics (Basel) 2024; 14:450. [PMID: 38396489 PMCID: PMC10887959 DOI: 10.3390/diagnostics14040450] [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: 12/09/2023] [Revised: 02/04/2024] [Accepted: 02/17/2024] [Indexed: 02/25/2024] Open
Abstract
Inflammation plays a crucial role in diabetes and obesity through macrophage activation. Macrophage chemoattractant protein-1 (MCP-1), activin-A, and clusterin are chemokines with known roles in diabetes and obesity. The aim of this study is to investigate their possible diagnostic and/or early prognostic values in children and adolescents with obesity and type-1 diabetes mellitus (T1DM). METHODS We obtained serum samples from children and adolescents with a history of T1DM or obesity, in order to measure and compare MCP-1, activin-A, and clusterin concentrations. RESULTS Forty-three subjects were included in each of the three groups (controls, T1DM, and obesity). MCP-1 values were positively correlated to BMI z-score. Activin-A was increased in children with obesity compared to the control group. A trend for higher values was detected in children with T1DM. MCP-1 and activin-A levels were positively correlated. Clusterin levels showed a trend towards lower values in children with T1DM or obesity compared to the control group and were negatively correlated to renal function. CONCLUSIONS The inflammation markers MCP-1, activin-A, and clusterin are not altered in children with T1DM. Conversely, obesity in children is positively correlated to serum MCP-1 values and characterized by higher activin-A levels, which may reflect an already established systematic inflammation with obesity since childhood.
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Affiliation(s)
- Eirini Kostopoulou
- Division of Pediatric Endocrinology, Department of Pediatrics, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (E.K.); (B.E.S.)
| | - Dimitra Kalavrizioti
- Department of Nephrology and Kidney Transplantation, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (D.K.); (P.D.); (E.P.); (D.G.); (M.P.)
| | - Panagiota Davoulou
- Department of Nephrology and Kidney Transplantation, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (D.K.); (P.D.); (E.P.); (D.G.); (M.P.)
| | - Evangelos Papachristou
- Department of Nephrology and Kidney Transplantation, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (D.K.); (P.D.); (E.P.); (D.G.); (M.P.)
| | - Xenophon Sinopidis
- Department of Pediatric Surgery, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece;
| | - Sotirios Fouzas
- Department of Pediatrics, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (S.F.); (T.D.); (D.G.); (A.K.); (G.D.)
| | - Theodore Dassios
- Department of Pediatrics, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (S.F.); (T.D.); (D.G.); (A.K.); (G.D.)
| | - Despoina Gkentzi
- Department of Pediatrics, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (S.F.); (T.D.); (D.G.); (A.K.); (G.D.)
| | - Stavroula Ioanna Kyriakou
- Department of Pediatric Surgery, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece;
| | - Ageliki Karatza
- Department of Pediatrics, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (S.F.); (T.D.); (D.G.); (A.K.); (G.D.)
| | - Gabriel Dimitriou
- Department of Pediatrics, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (S.F.); (T.D.); (D.G.); (A.K.); (G.D.)
| | - Dimitrios Goumenos
- Department of Nephrology and Kidney Transplantation, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (D.K.); (P.D.); (E.P.); (D.G.); (M.P.)
| | - Bessie E. Spiliotis
- Division of Pediatric Endocrinology, Department of Pediatrics, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (E.K.); (B.E.S.)
| | - Panagiotis Plotas
- Department of Speech and Language Therapy, School of Health Rehabilitation Sciences, University of Patras, 26504 Patras, Greece;
| | - Marios Papasotiriou
- Department of Nephrology and Kidney Transplantation, University Hospital of Patras, School of Medicine, University of Patras, 26504 Patras, Greece; (D.K.); (P.D.); (E.P.); (D.G.); (M.P.)
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Augusto JF, Beauvillain C, Poli C, Paolini L, Tournier I, Pignon P, Blanchard S, Preisser L, Soleti R, Delépine C, Monnier M, Douchet I, Asfar P, Beloncle F, Guisset O, Prével R, Mercat A, Vinatier E, Goret J, Subra JF, Couez D, Wilson MR, Blanco P, Jeannin P, Delneste Y. Clusterin Neutralizes the Inflammatory and Cytotoxic Properties of Extracellular Histones in Sepsis. Am J Respir Crit Care Med 2023; 208:176-187. [PMID: 37141109 DOI: 10.1164/rccm.202207-1253oc] [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: 07/04/2022] [Accepted: 05/03/2023] [Indexed: 05/05/2023] Open
Abstract
Rationale: Extracellular histones, released into the surrounding environment during extensive cell death, promote inflammation and cell death, and these deleterious roles have been well documented in sepsis. Clusterin (CLU) is a ubiquitous extracellular protein that chaperones misfolded proteins and promotes their removal. Objectives: We investigated whether CLU could protect against the deleterious properties of histones. Methods: We assessed CLU and histone expression in patients with sepsis and evaluated the protective role of CLU against histones in in vitro assays and in vivo models of experimental sepsis. Measurements and Main Results: We show that CLU binds to circulating histones and reduces their inflammatory, thrombotic, and cytotoxic properties. We observed that plasma CLU levels decreased in patients with sepsis and that the decrease was greater and more durable in nonsurvivors than in survivors. Accordingly, CLU deficiency was associated with increased mortality in mouse models of sepsis and endotoxemia. Finally, CLU supplementation improved mouse survival in a sepsis model. Conclusions: This study identifies CLU as a central endogenous histone-neutralizing molecule and suggests that, in pathologies with extensive cell death, CLU supplementation may improve disease tolerance and host survival.
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Affiliation(s)
- Jean-François Augusto
- Univ Angers, Nantes Université, INSERM, CNRS, CRCI2ICAT, Angers, France
- Département de Néphrologie, Dialyse et Transplantation
| | - Céline Beauvillain
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
- Laboratoire d'Immunologie et Allergologie, and
| | - Caroline Poli
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
- Laboratoire d'Immunologie et Allergologie, and
| | - Léa Paolini
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
| | - Isabelle Tournier
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
- Institut de Cancérologie de l'Ouest, Angers, France
| | - Pascale Pignon
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
| | - Simon Blanchard
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
- Laboratoire d'Immunologie et Allergologie, and
| | - Laurence Preisser
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
| | - Raffaella Soleti
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
| | - Chloé Delépine
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
| | - Marine Monnier
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
| | - Isabelle Douchet
- UMR-CNRS, ImmunConcept, University of Bordeaux, Bordeaux, France
| | - Pierre Asfar
- Service de Médecine Intensive et Réanimation, CHU d'Angers, Angers, France
- Université de Angers, Inserm, CNRS, MITOVASC, SFR ICAT, Angers, France
| | - François Beloncle
- Service de Médecine Intensive et Réanimation, CHU d'Angers, Angers, France
| | | | | | - Alain Mercat
- UMR-CNRS, ImmunConcept, University of Bordeaux, Bordeaux, France
| | - Emeline Vinatier
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
- Laboratoire d'Immunologie et Allergologie, and
| | - Julien Goret
- UMR-CNRS, ImmunConcept, University of Bordeaux, Bordeaux, France
- Department of Immunology and Immunogenetics, Bordeaux University Hospital, Bordeaux, France
| | - Jean-François Subra
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
- Département de Néphrologie, Dialyse et Transplantation
| | - Dominique Couez
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
| | - Mark R Wilson
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, Australia; and
- Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia
| | - Patrick Blanco
- UMR-CNRS, ImmunConcept, University of Bordeaux, Bordeaux, France
- Department of Immunology and Immunogenetics, Bordeaux University Hospital, Bordeaux, France
| | - Pascale Jeannin
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
- Laboratoire d'Immunologie et Allergologie, and
| | - Yves Delneste
- Univ Angers, Nantes Université, INSERM, CNRS, CRCIICAT, Angers, France
- Laboratoire d'Immunologie et Allergologie, and
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Jimenez-Coll V, Llorente S, Boix F, Alfaro R, Galián JA, Martinez-Banaclocha H, Botella C, Moya-Quiles MR, Muro-Pérez M, Minguela A, Legaz I, Muro M. Monitoring of Serological, Cellular and Genomic Biomarkers in Transplantation, Computational Prediction Models and Role of Cell-Free DNA in Transplant Outcome. Int J Mol Sci 2023; 24:ijms24043908. [PMID: 36835314 PMCID: PMC9963702 DOI: 10.3390/ijms24043908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/03/2023] [Accepted: 02/05/2023] [Indexed: 02/17/2023] Open
Abstract
The process and evolution of an organ transplant procedure has evolved in terms of the prevention of immunological rejection with the improvement in the determination of immune response genes. These techniques include considering more important genes, more polymorphism detection, more refinement of the response motifs, as well as the analysis of epitopes and eplets, its capacity to fix complement, the PIRCHE algorithm and post-transplant monitoring with promising new biomarkers that surpass the classic serum markers such as creatine and other similar parameters of renal function. Among these new biomarkers, we analyze new serological, urine, cellular, genomic and transcriptomic biomarkers and computational prediction, with particular attention to the analysis of donor free circulating DNA as an optimal marker of kidney damage.
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Affiliation(s)
- Víctor Jimenez-Coll
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Santiago Llorente
- Nephrology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Francisco Boix
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Rafael Alfaro
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - José Antonio Galián
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Helios Martinez-Banaclocha
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Carmen Botella
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - María R. Moya-Quiles
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Manuel Muro-Pérez
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Alfredo Minguela
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Isabel Legaz
- Department of Legal and Forensic Medicine, Biomedical Research Institute (IMIB), Regional Campus of International Excellence “Campus Mare Nostrum”, Faculty of Medicine, University of Murcia, 30100 Murcia, Spain
- Correspondence: (I.L.); (M.M.); Tel.: +34-699986674 (M.M.); Fax: +34-868834307 (M.M.)
| | - Manuel Muro
- Immunology Service, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
- Correspondence: (I.L.); (M.M.); Tel.: +34-699986674 (M.M.); Fax: +34-868834307 (M.M.)
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6
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The Most Promising Biomarkers of Allogeneic Kidney Transplant Rejection. J Immunol Res 2022; 2022:6572338. [PMID: 35669103 PMCID: PMC9167141 DOI: 10.1155/2022/6572338] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 04/30/2022] [Indexed: 12/13/2022] Open
Abstract
Clinical transplantology is a constantly evolving field of medicine. Kidney transplantation has become standard clinical practice, and it has a significant impact on reducing mortality and improving the quality of life of patients. Allogenic transplantation induces an immune response, which may lead to the rejection of the transplanted organ. The gold standard for evaluating rejection of the transplanted kidney by the recipient's organism is a biopsy of this organ. However, due to the high invasiveness of this procedure, alternative diagnostic methods are being sought. Therefore, the biomarkers may play an essential predictive role in transplant rejection. A review of the most promising biomarkers for early diagnosis and prognosis prediction of allogenic kidney transplant rejection summarizes novel data on neutrophil gelatinase-associated lipocalin (NGAL), kidney injury molecule-1 (KIM-1), C-X-C motif chemokine 10 (CXCL-10), cystatin C (CysC), osteopontin (OPN), and clusterin (CLU) and analyses the dynamics of changes of the biomarkers mentioned above in kidney diseases and the mechanism of rejection of the transplanted kidney.
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7
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Weng X, Li J, Guan Q, Zhao H, Wang Z, Gleave ME, Nguan CY, Du C. The functions of clusterin in renal mesenchymal stromal cells: Promotion of cell growth and regulation of macrophage activation. Exp Cell Res 2022; 413:113081. [PMID: 35218723 DOI: 10.1016/j.yexcr.2022.113081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 01/31/2022] [Accepted: 02/15/2022] [Indexed: 12/24/2022]
Abstract
Clusterin (CLU) increases resistance to renal ischemia-reperfusion injury and promotes renal tissue repair. However, the mechanisms underlying of the renal protection of CLU remain unknown. Mesenchymal stromal cells (MSCs) may contribute to kidney cell turnover and injury repair. This study investigated the in vitro functions of CLU in kidney mesenchymal stromal cells (KMSCs). KMSCs were grown in plastic culture plates. Cell surface markers, apoptosis and phagocytosis were determined by flow cytometry, and CLU protein by Western blot. There were no differences in the expression of MSC markers (positive: CD133, Sca-1, CD44, CD117 and NG2, and negative: CD34, CD45, CD163, CD41, CD276, CD138, CD79a, CD146 and CD140b) and in the trilineage differentiation to chondrocytes, adipocytes and osteocytes between wild type (WT) and CLU knockout (KO) KMSCs. CLU was expressed intracellularly and secreted by WT KMSCs, and it was up-regulated by hypoxia. CLU did not prevent hypoxia-induced cell apoptosis but promoted cell growth in KMSC cultures. Furthermore, incubation with CLU-containing culture medium from WT KMSCs increased CD206 expression and phagocytic capacity of macrophages. In conclusion, our data for the first time demonstrate the function of CLU in the promotion of KMSCs proliferation, and it may be required for KMSCs-regulated macrophage M2 polarization and phagocytic activity.
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Affiliation(s)
- Xiaodong Weng
- Department of Urology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, China; Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Jing Li
- Department of Ophthamology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430060, China
| | - Qiunong Guan
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Haimei Zhao
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada; College of Traditional Chinese Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, Jiangxi Province, China
| | - Zihuan Wang
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada; First Clinical Medical School, Southern Medical University, Guangzhou, 510000, China
| | - Martin E Gleave
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Christopher Yc Nguan
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Caigan Du
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada.
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8
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WANG M, OHARA H, EGAWA M, FUKUNAGA S, MATSUO H, GE ZR, NABIKA T. A 3-Mbp fragment on rat chromosome 1 affects susceptibility both to stroke and kidney injury under salt loading in the stroke-prone spontaneously hypertensive rat: a genetic approach using multiple congenic strains. Exp Anim 2022; 71:368-375. [PMID: 35354714 PMCID: PMC9388333 DOI: 10.1538/expanim.21-0189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We have previously reported that a major quantitative trait locus (QTL) responsible for susceptibility to salt-induced stroke in the stroke-prone spontaneously hypertensive rat (SHRSP) is
located in a 3-Mbp region on chromosome 1 covered by SHRSP.SHR-(D1Rat23-D1Rat213)/Izm (termed Pr1.31), a congenic strain with segments from SHRSP/Izm
introduced into the stroke-resistant SHR/Izm. Here, we attempted to narrow down the candidate region on chromosome 1 further through analyses of subcongenic strains constructed for the
target region. Simultaneously, salt-induced kidney injury was evaluated through the measurement of urinary albumin and the gene expression of renal tubular injury markers
(Kim-1 and Clu) to explore a possible mechanism leading to the onset of stroke. All subcongenic strains examined in this study showed lower susceptibility
to salt-induced stroke than SHRSP. Interestingly, Pr1.31 had the lowest stroke susceptibility when compared with newly constructed subcongenic strains harboring fragments of the congenic
sequence in Pr1.31. Although Kim-1 and Clu expression after 1 week of salt loading in Pr1.31 did not differ significantly from those in SHRSP, the urinary
albumin level of Pr1.31 was significantly lower than those of the other subcongenic strains and that of SHRSP. The present results indicated that, although the congenic fragment in Pr1.31
harbored the gene(s) related to salt-induced organ damages, further genetic dissection of the candidate region was difficult due to multiple QTLs suggested in this region. Further analysis
using Pr1.31 will unveil genetic and pathophysiological mechanisms underlying salt-induced end organ damages in SHRSP.
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Affiliation(s)
- Mei WANG
- Department of Functional Pathology, Faculty of Medicine, Shimane University
| | - Hiroki OHARA
- Department of Functional Pathology, Faculty of Medicine, Shimane University
| | | | | | - Hiroyuki MATSUO
- Department of Functional Pathology, Faculty of Medicine, Shimane University
| | - Zhi-Ru GE
- Department of Cardiology, Shanghai Gongli Hospital, Second Military Medical University
| | - Toru NABIKA
- Department of Functional Pathology, Faculty of Medicine, Shimane University
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9
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Sun P, Feng S, Guan Q, Adomat H, Barbour S, Gleave ME, Nguan CYC, Xu W, Du C. Clusterin Deficiency Predisposes C57BL/6j Mice to Cationic Bovine Serum Albumin-Induced Glomerular Inflammation. J Inflamm Res 2020; 13:969-983. [PMID: 33262633 PMCID: PMC7699998 DOI: 10.2147/jir.s285985] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 11/18/2020] [Indexed: 02/05/2023] Open
Abstract
Background Membranous nephropathy (MN) is a specific entity of glomerulonephritis, and its glomerular inflammation is characterized by the deposition of immune complexes in the glomerular basement membrane and proteinuria. However, the molecular mechanisms underlying the glomerular inflammation of MN are not fully understood. This study was designed to investigate the role of clusterin (CLU) in the development of MN using a mouse model of cationic bovine serum albumin (cBSA)-induced MN. Methods Both wild-type C57BL/6j (WT) and CLU-knockout C57BL/6j (CLU-KO) mice were immunized with cBSA. The kidney function was determined by the levels of serum creatinine (SCr), blood urea nitrogen (BUN) and urinary protein. MN and glomerular deposits of CLU, complement C3 and immunoglobulins (Igs) were determined by histological analyses. Serum proteins were analyzed by the enzyme-linked immunosorbent assay, Western blot and liquid chromatography-mass spectrometry. Results Here, we showed that after cBSA immunization, SCr and proteinuria were increased in CLU-KO mice but not in WT mice. Similarly, severe glomerular atrophy and mesangial expansion along with C3 deposit were only found in the kidneys of CLU-KO mice but not in WT mice. However, there were no differences of serum IgG and complement 3 levels between CLU-KO and WT mice. In the serum of WT mice, CLU bound to anti-cBSA IgG, complements (eg, C8), proteinase/protease inhibitors and antioxidative proteins to form a complex, and incubation with WT serum reduced the complement-dependent lysis of podocytes in cultures. Conclusion Our data suggest that a CLU deficiency induces cBSA-initiated glomerular inflammation of MN in a disease-resistant strain of mice, suggesting an anti-glomerular inflammatory function of CLU in the resistance to MN development. This function may be at least in part due to the formation of CLU-anti-cBSA Igs complex that prevents glomerular inflammation or injury in the disease-resistant mice.
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Affiliation(s)
- Pengcheng Sun
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC V6H 3Z6, Canada.,Department of Gynecology and Obstetrics, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, People's Republic of China
| | - Shijian Feng
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC V6H 3Z6, Canada.,Department of Urology, Institute of Reconstructive Urology, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
| | - Qiunong Guan
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Hans Adomat
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Sean Barbour
- Division of Nephrology, Department of Medicine, University of British Columbia, Vancouver, BC V5T 3A5, Canada
| | - Martin E Gleave
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Christopher Y C Nguan
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Wanhai Xu
- Heilongjiang Key Laboratory of Scientific Research in Urology, Department of Urology, The Fourth Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, People's Republic of China
| | - Caigan Du
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
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10
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Weng X, Zhao H, Guan Q, Shi G, Feng S, Gleave ME, Nguan CC, Du C. Clusterin regulates macrophage expansion, polarization and phagocytic activity in response to inflammation in the kidneys. Immunol Cell Biol 2020; 99:274-287. [PMID: 32935392 PMCID: PMC7984284 DOI: 10.1111/imcb.12405] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/22/2020] [Accepted: 09/13/2020] [Indexed: 12/26/2022]
Abstract
Clusterin (CLU) is a multifunctional protein localized extracellularly and intracellularly. Although CLU-knockout (KO) mice are more susceptible to renal ischemia-reperfusion injury (IRI), the mechanisms underlying the actions of CLU in IRI are not fully understood. Macrophages are key regulators of IRI severity and tissue repair. Therefore, we investigated the role of CLU in macrophage polarization and phagocytosis. Renal IRI was induced in wild-type (WT) or CLU-KO C57BL/6 mice by clamping the renal pedicles for 30 min at 32°C. Peritoneal macrophages were activated via an intraperitoneal injection of lipopolysaccharide (LPS). Renal tissue damage was examined using histology, whereas leukocyte phenotypes were assessed using flow cytometry and immunohistochemistry. We found that monocytes/macrophages expressed the CLU protein that was upregulated by hypoxia. The percentages of macrophages (F4/80+ , CD11b+ or MAC3+ ) infiltrating the kidneys of WT mice were significantly less than those in CLU-KO mice after IRI. The M1/M2 phenotype ratio of the macrophages in WT kidneys decreased at day 7 post-IRI when the injury was repaired, whereas that in KO kidneys increased consistently as tissue injury persisted. In response to LPS stimulation, WT mice produced fewer M1 macrophages, but not M2, than the control did. Phagocytosis was stimulated by CLU expression in macrophages compared with the CLU null controls and by the exogenous CLU protein. In conclusion, CLU suppresses macrophage infiltration and proinflammatory M1 polarization during the recovery period following IRI, and enhances phagocytic activity, which may be partly responsible for tissue repair in the kidneys of WT mice after injury.
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Affiliation(s)
- Xiaodong Weng
- Department of Urologic Sciences, The University of British Columbia, Vancouver, BC, V5Z 1M9, Canada.,Department of Urology, Renmin Hospital of Wuhan University, Wuhan, Hubei, 430060, China
| | - Haimei Zhao
- Department of Urologic Sciences, The University of British Columbia, Vancouver, BC, V5Z 1M9, Canada.,College of Traditional Chinese Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi Province, 330004, China
| | - Qiunong Guan
- Department of Urologic Sciences, The University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Ganggang Shi
- Department of Urologic Sciences, The University of British Columbia, Vancouver, BC, V5Z 1M9, Canada.,Department of Colorectal Surgery, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Shijian Feng
- Department of Urologic Sciences, The University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Martin E Gleave
- Department of Urologic Sciences, The University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Christopher Cy Nguan
- Department of Urologic Sciences, The University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Caigan Du
- Department of Urologic Sciences, The University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
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11
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Glomerular clusterin expression is increased in diabetic nephropathy and protects against oxidative stress-induced apoptosis in podocytes. Sci Rep 2020; 10:14888. [PMID: 32913257 PMCID: PMC7484791 DOI: 10.1038/s41598-020-71629-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 08/17/2020] [Indexed: 12/12/2022] Open
Abstract
Clusterin, a glycoprotein encoded by the CLU gene, is expressed in many tissues, including the kidney, and clusterin expression is upregulated in the glomeruli of patients with various forms of kidney disease. Here, we investigated the role of clusterin in diabetic nephropathy (DN). In this study, we found that glomerular clusterin expression was increased in both patients with DN and streptozotocin-induced diabetic mice and that it co-localised with the podocyte marker WT1, indicating clusterin is expressed in podocytes. In our in vitro analysis, we found no significant change in CLU mRNA expression in podocytes following stimulation with high glucose and angiotensin II; in contrast, CLU mRNA expression was significantly upregulated following methylglyoxal stimulation. Methylglyoxal treatment also significantly decreased the mRNA expression of the slit diaphragm markers ZO-1 and NEPH1 and significantly increased the mRNA expression of the oxidative stress marker HO-1. Lastly, we showed that pre-incubating podocytes with recombinant human clusterin protein increased podocyte survival, prevented slit diaphragm damage, and reduced oxidative stress‒induced apoptosis following methylglyoxal stimulation. Taken together, our results indicate that glomerular clusterin is upregulated in DN, and this increase in clusterin expression may protect against oxidative stress-induced apoptosis in podocytes, providing a possible new therapeutic target for DN and other kidney diseases.
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12
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Clusterin as a New Marker of Kidney Injury in Children Undergoing Allogeneic Hematopoietic Stem Cell Transplantation-A Pilot Study. J Clin Med 2020; 9:jcm9082599. [PMID: 32796610 PMCID: PMC7465616 DOI: 10.3390/jcm9082599] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/07/2020] [Accepted: 08/09/2020] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND AND AIMS The markers of renal damage defining subclinical AKI are not widely used in children undergoing allogeneic hematopoietic stem cell transplantation (alloHSCT). The aim of the study was to evaluate serum and urinary clusterin as indices of kidney injury after alloHSCT in relation to damage (kidney injury molecule (KIM)-1) and functional (cystatin C) markers. MATERIAL AND METHODS Serum and urinary clusterin, KIM-1 and cystatin C concentrations were assessed by ELISA in 27 children before alloHSCT, 24 h, 1, 2, 3 and 4 weeks after alloHSCT and in controls. RESULTS All parameters were significantly higher in HSCT patients compared to controls even before the transplantation. The serum concentrations increased after HSCT and this rising trend was kept until the third (clusterin) or 4th (KIM-1, cystatin C) week. Urinary clusterin and KIM-1 were elevated until the third week and then decreased yet remained higher than before HSCT. Urinary cystatin C has risen from the second week after HSCT and decreased after the third week but was still higher than before alloHSCT. CONCLUSIONS The features of kidney injury are present even before alloHSCT. Clusterin seems useful in the assessment of subclinical AKI and may become a new early marker of sublethal kidney injury in children.
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13
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Tarquini C, Pucci S, Scioli MG, Doldo E, Agostinelli S, D'Amico F, Bielli A, Ferlosio A, Caredda E, Tarantino U, Orlandi A. Clusterin exerts a cytoprotective and antioxidant effect in human osteoarthritic cartilage. Aging (Albany NY) 2020; 12:10129-10146. [PMID: 32516132 PMCID: PMC7346069 DOI: 10.18632/aging.103310] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 04/28/2020] [Indexed: 12/31/2022]
Abstract
Osteoarthritis (OA) is the most common joint disease characterized by destruction of articular cartilage. OA-induced cartilage degeneration causes inflammation, oxidative stress and the hypertrophic shift of quiescent chondrocytes. Clusterin (CLU) is a ubiquitous glycoprotein implicated in many cellular processes and its upregulation has been recently reported in OA cartilage. However, the specific role of CLU in OA cartilage injury has not been investigated yet. We analyzed CLU expression in human articular cartilage in vivo and in cartilage-derived chondrocytes in vitro. CLU knockdown in OA chondrocytes was also performed and its effect on proliferation, hypertrophic phenotype, apoptosis, inflammation and oxidative stress was investigated. CLU expression was upregulated in human OA cartilage and in cultured OA cartilage-derived chondrocytes compared with control group. CLU knockdown reduced cell proliferation and increased hypertrophic phenotype as well as apoptotic death. CLU-silenced OA chondrocytes showed higher MMP13 and COL10A1 as well as greater TNF-α, Nox4 and ROS levels. Our results indicate a possible cytoprotective role of CLU in OA chondrocytes promoting cell survival by its anti-apoptotic, anti-inflammatory and antioxidant properties and counteracting the hypertrophic phenotypic shift. Further studies are needed to deepen the role of CLU in order to identify a new potential therapeutic target for OA.
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Affiliation(s)
- Chiara Tarquini
- Anatomic Pathology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy.,Orthopedics and Traumatology, Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Sabina Pucci
- Anatomic Pathology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Maria Giovanna Scioli
- Anatomic Pathology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Elena Doldo
- Anatomic Pathology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Sara Agostinelli
- Anatomic Pathology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Federico D'Amico
- Anatomic Pathology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Alessandra Bielli
- Anatomic Pathology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Amedeo Ferlosio
- Anatomic Pathology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Emanuele Caredda
- Hygiene and Preventive Medicine, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Umberto Tarantino
- Orthopedics and Traumatology, Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Augusto Orlandi
- Anatomic Pathology, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy.,Department of Biomedical Sciences, Catholic University Our Lady of Good Counsel, Tirana, Albania
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14
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Da Y, Akalya K, Murali T, Vathsala A, Tan CS, Low S, Lim HN, Teo BW, Lau T, Ong L, Chua HR. Serial Quantification of Urinary Protein Biomarkers to Predict Drug-induced Acute Kidney Injury. Curr Drug Metab 2020; 20:656-664. [PMID: 31296157 DOI: 10.2174/1389200220666190711114504] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 06/28/2019] [Accepted: 07/01/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND Drug-induced Acute Kidney Injury (AKI) develops in 10-15% of patients who receive nephrotoxic medications. Urinary biomarkers of renal tubular dysfunction may detect nephrotoxicity early and predict AKI. METHODS We prospectively studied patients who received aminoglycosides, vancomycin, amphotericin, or calcineurin inhibitors, and collected their serial urine while on therapy. Patients who developed drug-induced AKI (fulfilling KDIGO criteria) were matched with non-AKI controls in a 1:2 ratio. Their urine samples were batch-analyzed at time-intervals leading up to AKI onset; the latter benchmarked against the final day of nephrotoxic therapy in non- AKI controls. Biomarkers examined include clusterin, beta-2-microglobulin, KIM1, MCP1, cystatin-C, trefoil-factor- 3, NGAL, interleukin-18, GST-Pi, calbindin, and osteopontin; biomarkers were normalized with corresponding urine creatinine. RESULTS Nine of 84 (11%) patients developed drug-induced AKI. Biomarkers from 7 AKI cases with pre-AKI samples were compared with those from 14 non-AKI controls. Corresponding mean ages were 55(±17) and 52(±16) years; baseline eGFR were 99(±21) and 101(±24) mL/min/1.73m2 (all p=NS). Most biomarker levels peaked before the onset of AKI. Median levels of 5 biomarkers were significantly higher in AKI cases than controls at 1-3 days before AKI onset (all µg/mmol): clusterin [58(8-411) versus 7(3-17)], beta-2-microglobulin [1632(913-3823) versus 253(61-791)], KIM1 [0.16(0.13-0.76) versus 0.07(0.05-0.15)], MCP1 [0.40(0.16-1.90) versus 0.07(0.04-0.17)], and cystatin-C [33(27-2990) versus 11(7-19)], all p<0.05; their AUROC for AKI prediction were >0.80 (confidence intervals >0.50), with average accuracy highest for clusterin (86%), followed by beta-2-microglobulin, cystatin-C, MCP1, and KIM1 (57%) after cross-validation. CONCLUSION Serial surveillance of these biomarkers could improve the lead time for nephrotoxicity detection by days.
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Affiliation(s)
- Yi Da
- Division of Nephrology, University Medicine Cluster, National University Hospital, Singapore 119074, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore
| | - K Akalya
- Division of Nephrology, University Medicine Cluster, National University Hospital, Singapore 119074, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore
| | - Tanusya Murali
- Division of Nephrology, University Medicine Cluster, National University Hospital, Singapore 119074, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore
| | - Anantharaman Vathsala
- Division of Nephrology, University Medicine Cluster, National University Hospital, Singapore 119074, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore
| | - Chuen-Seng Tan
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore 119077, Singapore
| | - Sanmay Low
- Division of Nephrology, University Medicine Cluster, National University Hospital, Singapore 119074, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore
| | - Hui-Ning Lim
- Department of Pharmacy, National University Hospital, Singapore 119074, Singapore
| | - Boon-Wee Teo
- Division of Nephrology, University Medicine Cluster, National University Hospital, Singapore 119074, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore
| | - Titus Lau
- Division of Nephrology, University Medicine Cluster, National University Hospital, Singapore 119074, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore
| | - Lizhen Ong
- Department of Laboratory Medicine, National University Hospital, Singapore 119074, Singapore
| | - Horng-Ruey Chua
- Division of Nephrology, University Medicine Cluster, National University Hospital, Singapore 119074, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore
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15
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Herring SK, Moon HJ, Rawal P, Chhibber A, Zhao L. Brain clusterin protein isoforms and mitochondrial localization. eLife 2019; 8:48255. [PMID: 31738162 PMCID: PMC6860991 DOI: 10.7554/elife.48255] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 10/24/2019] [Indexed: 01/04/2023] Open
Abstract
Clusterin (CLU), or apolipoprotein J (ApoJ), is the third most predominant genetic risk factor associated with late-onset Alzheimer’s disease (LOAD). In this study, we use multiple rodent and human brain tissue and neural cell models to demonstrate that CLU is expressed as multiple isoforms that have distinct cellular or subcellular localizations in the brain. Of particular significance, we identify a non-glycosylated 45 kDa CLU isoform (mitoCLU) that is localized to the mitochondrial matrix and expressed in both rodent and human neurons and astrocytes. In addition, we show that rodent mitoCLU is translated from a non-canonical CUG (Leu) start site in Exon 3, a site that coincides with an AUG (Met) in human CLU. Last, we reveal that mitoCLU is present at the gene and protein level in the currently available CLU–/– mouse model. Collectively, these data provide foundational knowledge that is integral in elucidating the relationship between CLU and the development of LOAD.
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Affiliation(s)
- Sarah K Herring
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, United States
| | - Hee-Jung Moon
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, United States
| | - Punam Rawal
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, United States
| | - Anindit Chhibber
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, United States
| | - Liqin Zhao
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, United States.,Neuroscience Graduate Program, University of Kansas, Lawrence, United States
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16
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Clusterin Attenuates Hepatic Fibrosis by Inhibiting Hepatic Stellate Cell Activation and Downregulating the Smad3 Signaling Pathway. Cells 2019; 8:cells8111442. [PMID: 31739636 PMCID: PMC6912488 DOI: 10.3390/cells8111442] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/10/2019] [Accepted: 11/11/2019] [Indexed: 01/12/2023] Open
Abstract
Clusterin is a glycoprotein that is expressed in most human tissues and found in body fluids. In our previous studies we demonstrated that clusterin has a protective effect against hepatic lipid accumulation and renal fibrosis; however, the role of clusterin in hepatic fibrosis is unknown. Here, we examined whether clusterin had protective effects against hepatic fibrosis using in vitro and in vivo models. Clusterin was upregulated in the livers of human cirrhotic patients and in thioacetamide (TAA)-induced and bile duct ligation mouse models of liver fibrosis. Loss and overexpression of clusterin promoted and attenuated hepatic fibrosis after TAA injection, respectively. In addition, we found that clusterin attenuates hepatic fibrosis by inhibiting the activation of hepatic stellate cells and Smad3 signaling pathways. Thus, clusterin plays an important role in hepatic fibrosis.
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17
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Iłżecka J, Iłżecki M, Grabarska A, Dave S, Feldo M, Zubilewicz T. Clusterin as a potential marker of brain ischemia-reperfusion injury in patients undergoing carotid endarterectomy. Ups J Med Sci 2019; 124:193-198. [PMID: 31460820 PMCID: PMC6758642 DOI: 10.1080/03009734.2019.1646359] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Introduction: Carotid endarterectomy (CEA) is a surgical procedure used in the prevention of ischemic stroke. However, this procedure can cause complications of ischemia-reperfusion injury to the brain. Clusterin (CLU) is a cytoprotective chaperone protein that is released from neurons in response to various neurological injuries. The objective of the study was to report the changes in serum CLU concentrations of patients undergoing CEA. Materials and methods: The study involved 25 patients with severe internal carotid artery stenosis. Serum samples were taken from patients at three different times: within 24 hours preoperatively to CEA, 12 hours postoperatively, and 48 hours postoperatively. Serum CLU concentrations were measured using a commercially available enzyme-linked immunosorbent assay. Results: When compared to concentrations preoperatively, the serum CLU concentration initially decreased during the 12 hours following CEA. However, 48 hours following the procedure there was an increase in the CLU concentration. After statistical analysis, differences were detected in serum CLU concentration between all three recorded measurements (P < 0.05). Conclusion: Data from our study indicate that serum CLU concentrations are affected after CEA. We hypothesize that serum CLU concentrations may depend on brain ischemia-reperfusion injury following this surgical procedure.
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Affiliation(s)
- Joanna Iłżecka
- Independent Neurological Rehabilitation Unit, Medical University of Lublin, Lublin, Poland
- CONTACT Joanna Iłżecka, MD, PhD Independent Neurological Rehabilitation Unit, S. Staszica 4/6, 20-081 Lublin, Poland
| | - Marek Iłżecki
- Department of Vascular Surgery and Angiology, Medical University of Lublin, Lublin, Poland
| | - Aneta Grabarska
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Shawn Dave
- University of Oklahoma Health Sciences Center in Oklahoma City, Oklahoma, USA
| | - Marcin Feldo
- Department of Vascular Surgery and Angiology, Medical University of Lublin, Lublin, Poland
| | - Tomasz Zubilewicz
- Department of Vascular Surgery and Angiology, Medical University of Lublin, Lublin, Poland
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18
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Zhu H, Liu M, Zhai T, Pan H, Wang L, Yang H, Yan K, Gong F, Zeng Y. High serum clusterin levels are associated with premature coronary artery disease in a Chinese population. Diabetes Metab Res Rev 2019; 35:e3128. [PMID: 30659732 DOI: 10.1002/dmrr.3128] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/10/2019] [Accepted: 01/11/2019] [Indexed: 11/11/2022]
Abstract
BACKGROUND Clusterin plays an important role in the cardiovascular system, and serum levels of clusterin are higher in coronary artery disease patients. Here, we measured serum clusterin levels in premature coronary artery disease (PCAD) patients and explored the association of these levels with PCAD risk. METHODS Serum samples and general clinical information were obtained from 672 subjects including 364 PCAD subjects, 126 non-PCAD subjects, and 182 controls. RESULTS Serum clusterin levels were higher in PCAD patients than in controls, particularly in males with body mass index (BMI) < 25 kg/m2 (P < 0.0001). Compared with the lowest tertile of clusterin, the odds ratio of PCAD in the highest tertile was higher in both a univariate and three adjustment models, and it was 3.146-fold higher in Model 3. This association was especially significant in subgroups with BMI < 25 kg/m2 , total cholesterol < 5.7 mmol/L, high-density lipoprotein cholesterol ≥ 1.0 mmol/L, Urea < 7.14 mmol/L, and estimated glomerular filtration rate < 90 mL/min/1.73 m2 . Serum clusterin may be a potential diagnostic biomarker for PCAD (sensitivity 60.7%, specificity 51.6%, area under the curve 0.595 [95% CI, 0.544-0.647], P < 0.0001), and a combination of clusterin with clinical variables in Model 3 resulted in improved diagnostic accuracy (sensitivity 86.3%, specificity 64.2%, area under the curve 0.829 [95% CI, 0.782-0.877], P < 0.0001). CONCLUSIONS Serum clusterin levels were increased in PCAD patients, especially for males with BMI < 25 kg/m2 . Higher clusterin levels were independently associated with the presence of PCAD, particularly in subjects with normal BMI, lower total cholesterol, urea, estimated glomerular filtration rate, and higher high-density lipoprotein cholesterol. Clusterin might be a potential diagnostic biomarker for PCAD patients, especially in combination with clinical variables.
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Affiliation(s)
- Huijuan Zhu
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Meijuan Liu
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Tianshu Zhai
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Hui Pan
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Linjie Wang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Hongbo Yang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Kemin Yan
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Fengying Gong
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Yong Zeng
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
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Pasten C, Alvarado C, Rocco J, Contreras L, Aracena P, Liberona J, Suazo C, Michea L, Irarrázabal CE. l-NIL prevents the ischemia and reperfusion injury involving TLR-4, GST, clusterin, and NFAT-5 in mice. Am J Physiol Renal Physiol 2019; 316:F624-F634. [DOI: 10.1152/ajprenal.00398.2018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
On renal ischemia-reperfusion (I/R) injury, recruitment of neutrophils during the inflammatory process promotes local generation of oxygen and nitrogen reactive species, which, in turn, are likely to exacerbate tissue damage. The mechanism by which inducible nitric oxide synthase (iNOS) is involved in I/R has not been elucidated. In this work, the selective iNOS inhibitor l- N6-(1-iminoethyl)lysine (l-NIL) and the NOS substrate l-arginine were employed to understand the role of NOS activity on the expression of particular target genes and the oxidative stress elicited after a 30-min of bilateral renal ischemia, followed by 48-h reperfusion in Balb/c mice. The main findings of the present study were that pharmacological inhibition of iNOS with l-NIL during an I/R challenge of mice kidney decreased renal injury, prevented tissue loss of integrity, and improved renal function. Several novel findings regarding the molecular mechanism by which iNOS inhibition led to these protective effects are as follows: 1) a prevention of the I/R-related increase in expression of Toll-like receptor 4 (TLR-4), and its downstream target, IL-1β; 2) reduced oxidative stress following the I/R challenge; noteworthy, this study shows the first evidence of glutathione S-transferase (GST) inactivation following kidney I/R, a phenomenon fully prevented by iNOS inhibition; 3) increased expression of clusterin, a survival autophagy component; and 4) increased expression of nuclear factor of activated T cells 5 (NFAT-5) and its target gene aquaporin-1. In conclusion, prevention of renal damage following I/R by the pharmacological inhibition of iNOS with l-NIL was associated with the inactivation of proinflammatory pathway triggered by TLR-4, oxidative stress, renoprotection (autophagy inactivation), and NFAT-5 signaling pathway.
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Affiliation(s)
- Consuelo Pasten
- Laboratorio de Fisiología Integrativa y Molecular, Centro de Investigación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Cristóbal Alvarado
- School of Medicine and Science, Universidad San Sebastián, Concepción, Chile
- School of Medicine, Universidad Católica de la Santísima Concepción, Concepción, Chile
| | - Jocelyn Rocco
- Laboratorio de Fisiología Integrativa y Molecular, Centro de Investigación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Luis Contreras
- Department of Pathological Anatomy, Clínica Universidad de los Andes, Santiago, Chile
| | - Paula Aracena
- School of Medicine and Science, Universidad San Sebastián, Concepción, Chile
| | - Jéssica Liberona
- Institute of Biomedical Sciences, School of Medicine, Universidad de Chile, Santiago, Chile
| | - Cristian Suazo
- Laboratorio de Fisiología Integrativa y Molecular, Centro de Investigación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Luis Michea
- Institute of Biomedical Sciences, School of Medicine, Universidad de Chile, Santiago, Chile
- Division of Nephrology, Department of Medicine, Hospital Clínico Universidad de Chile, Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Santiago, Chile
| | - Carlos E. Irarrázabal
- Laboratorio de Fisiología Integrativa y Molecular, Centro de Investigación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
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20
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Xiong J, Wang S, Chen T, Shu X, Mo X, Chang G, Chen JJ, Li C, Luo H, Lee JD. Verteporfin blocks Clusterin which is required for survival of gastric cancer stem cell by modulating HSP90 function. Int J Biol Sci 2019; 15:312-324. [PMID: 30745823 PMCID: PMC6367548 DOI: 10.7150/ijbs.29135] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 11/11/2018] [Indexed: 02/05/2023] Open
Abstract
Gastric cancer stem cell (GCSC) is implicated in gastric cancer relapse, metastasis and drug resistance. However, the key molecule(s) involved in GCSC survival and the targeting drugs are poorly understood. We discovered increased secreted clusterin (S-Clu) protein expression during the sphere-forming growth of GCSC via mass spectrometry. Overexpression of clusterin was detected in 69/90 (77%) of primary GC tissues and significantly associated with T stage, lymph node metastasis and TNM stage. Depletion of clusterin (Clu, the full-length intracellular clusterin) led to the declustering of GCSC tumorspheres and apoptosis of GCSC. Subsequently, we found clusterin was in complex with heat shock protein 90 beta (HSP90) and involved in regulating the cellular level of HSP90 client proteins. Furthermore, by screening a collection of drugs/inhibitors, we found that verteporfin (VP), a phototherapy drug, blocked clusterin gene expression, decreased the HSP90 client proteins and caused cell death of GCSC. VP treatment is more effective in eradicating GCSCs than in killing GC cells. Both clusterin silencing or VP treatment deterred tumor growth in human GCSC xenografts. These findings collectively suggest that GC patients can promptly benefit from clusterin-targeted therapy as well as VP treatment in combination with or subsequent to conventional chemotherapy for reducing mortality of GC.
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Affiliation(s)
- Jixian Xiong
- School of Medicine, Shenzhen University, Shenzhen 518055, China.,Shenzhen University International Cancer Center, Shenzhen University, Shenzhen 518055, China
| | - Shaoxiang Wang
- School of Medicine, Shenzhen University, Shenzhen 518055, China
| | - Tie Chen
- School of Medicine, Shenzhen University, Shenzhen 518055, China
| | - Xingsheng Shu
- School of Medicine, Shenzhen University, Shenzhen 518055, China
| | - Xianming Mo
- Laboratory of Stem Cell Biology, State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Gang Chang
- School of Medicine, Shenzhen University, Shenzhen 518055, China
| | - Jia-Jie Chen
- School of Medicine, Shenzhen University, Shenzhen 518055, China
| | - Chenyang Li
- School of Medicine, Shenzhen University, Shenzhen 518055, China
| | - Hui Luo
- School of Medicine, Shenzhen University, Shenzhen 518055, China
| | - Jiing-Dwan Lee
- School of Medicine, Shenzhen University, Shenzhen 518055, China
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21
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Heo JY, Kim JE, Dan Y, Kim YW, Kim JY, Cho KH, Bae YK, Im SS, Liu KH, Song IH, Kim JR, Lee IK, Park SY. Clusterin deficiency induces lipid accumulation and tissue damage in kidney. J Endocrinol 2018; 237:175-191. [PMID: 29563234 DOI: 10.1530/joe-17-0453] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 03/21/2018] [Indexed: 01/15/2023]
Abstract
Clusterin is a secretory glycoprotein that is involved in multiple physiopathological processes, including lipid metabolism. Previous studies have shown that clusterin prevents hepatic lipid accumulation via suppression of sterol regulatory element-binding protein (SREBP) 1. In this study, we examined the role of clusterin in renal lipid accumulation in clusterin-knockout mice and NRK52e tubular epithelial cells. Clusterin deficiency increased the expression of SREBP1 and its target genes and decreased malonyl-CoA decarboxylase protein levels in the kidney. Expression of the endocytic receptor, megalin, and scavenger receptor class A was increased in clusterin-deficient mice. Functional analysis of lipid metabolism also revealed that lipid uptake and triglyceride synthesis were increased and fatty acid oxidation was reduced, leading to increased lipid accumulation in clusterin-deficient mice. These phenomena were accompanied by mesangial expansion, fibrosis and increased urinary protein-to-creatinine ratio. High-fat feeding aggravated these clusterin deficiency-induced pathological changes. Clusterin knockdown in NRK52e cells increased lipogenic gene expression and lipid levels, whereas overexpression of clusterin by treatment with adenovirus or recombinant clusterin protein suppressed lipogenic gene expression and lipid levels. Transforming growth factor-beta 1 (TGFB1) expression increased in the kidney of clusterin-deficient mice and suppression of TGFB1 in NRK52e cells suppressed lipid accumulation. These results suggest that clusterin deficiency induces renal lipid accumulation by dysregulating the expression of lipid metabolism-related factors and TGFB1, thereby leading to chronic kidney disease. Hence, clusterin may serve as a therapeutic target for lipid-induced chronic kidney disease.
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Affiliation(s)
- Jung-Yoon Heo
- Department of PhysiologyCollege of Medicine, Yeungnam University, Daegu, Korea
- Smart-Aging Convergence Research CenterCollege of Medicine, Yeungnam University, Daegu, Korea
| | - Ji-Eun Kim
- Department of PhysiologyCollege of Medicine, Yeungnam University, Daegu, Korea
- Smart-Aging Convergence Research CenterCollege of Medicine, Yeungnam University, Daegu, Korea
| | - Yongwook Dan
- Weinberg CollegeNorthwestern University, Evanston, Illinois, USA
| | - Yong-Woon Kim
- Department of PhysiologyCollege of Medicine, Yeungnam University, Daegu, Korea
| | - Jong-Yeon Kim
- Department of PhysiologyCollege of Medicine, Yeungnam University, Daegu, Korea
| | - Kyu Hyang Cho
- Department of Internal MedicineCollege of Medicine, Yeungnam University, Daegu, Korea
| | - Young Kyung Bae
- Department of PathologyCollege of Medicine, Yeungnam University, Daegu, Korea
| | - Seung-Soon Im
- Department of PhysiologyKeimyung University School of Medicine, Daegu, Korea
| | - Kwang-Hyeon Liu
- College of Pharmacy and Research Institute of Pharmaceutical SciencesKyungpook National University, Daegu, Korea
| | - In-Hwan Song
- Department of AnatomyCollege of Medicine, Yeungnam University, Daegu, Korea
| | - Jae-Ryong Kim
- Smart-Aging Convergence Research CenterCollege of Medicine, Yeungnam University, Daegu, Korea
- Department of Biochemistry and Molecular BiologyCollege of Medicine, Yeungnam University, Daegu, Korea
| | - In-Kyu Lee
- Department of Internal MedicineSchool of Medicine, Kyungpook National University, Daegu, Korea
| | - So-Young Park
- Department of PhysiologyCollege of Medicine, Yeungnam University, Daegu, Korea
- Smart-Aging Convergence Research CenterCollege of Medicine, Yeungnam University, Daegu, Korea
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Hepatocyte-specific clusterin overexpression attenuates diet-induced nonalcoholic steatohepatitis. Biochem Biophys Res Commun 2018; 495:1775-1781. [DOI: 10.1016/j.bbrc.2017.12.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 12/08/2017] [Indexed: 02/07/2023]
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23
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Sant B, Rao PVL, Nagar DP, Pant SC, Bhasker ASB. Evaluation of abrin induced nephrotoxicity by using novel renal injury markers. Toxicon 2017; 131:20-28. [PMID: 28288935 DOI: 10.1016/j.toxicon.2017.03.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 03/08/2017] [Accepted: 03/09/2017] [Indexed: 12/22/2022]
Abstract
Abrin is a potent plant toxin analogous to ricin that is derived from the seeds of Abrus precatorius plant. It belongs to the family of type II ribosome-inactivating proteins and causes cell death by irreversibly inactivating ribosomes through site-specific depurination. In this study we examined the in vivo nephrotoxicity potential of abrin toxin in terms of oxidative stress, inflammation, histopathological changes and biomarkers of kidney injury. Animals were exposed to 0.5 and 1.0 LD50 dose of abrin by intraperitoneal route and observed for 1, 3, and 7 day post-toxin exposure. Depletion of reduced glutathione and increased lipid peroxidation levels were observed in abrin treated mice. In addition, abrin also induced inflammation in the kidneys as observed through expression of MMP-9 and MMP-9/NGAL complex in abrin treated groups by using zymography method. Nephrotoxicity was also evaluated by western blot analysis of kidney injury biomarkers including Clusterin, Cystatin C and NGAL, and their results indicate severity of kidney injury in abrin treated groups. Kidney histology confirmed inflammatory changes due to abrin. The data generated in the present study clearly prove the nephrotoxicity potential of abrin.
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Affiliation(s)
- Bhavana Sant
- Division of Pharmacology and Toxicology, Defence Research and Development Establishment, Jhansi Road, Gwalior 474002, India
| | - P V Lakshmana Rao
- Division of Pharmacology and Toxicology, Defence Research and Development Establishment, Jhansi Road, Gwalior 474002, India
| | - D P Nagar
- Division of Pharmacology and Toxicology, Defence Research and Development Establishment, Jhansi Road, Gwalior 474002, India
| | - S C Pant
- Division of Pharmacology and Toxicology, Defence Research and Development Establishment, Jhansi Road, Gwalior 474002, India
| | - A S B Bhasker
- Division of Pharmacology and Toxicology, Defence Research and Development Establishment, Jhansi Road, Gwalior 474002, India.
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24
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Luo D, Guan Q, Wang K, Nguan CY, Du C. TGF-β1 stimulates movement of renal proximal tubular epithelial cells in a three-dimensional cell culture via an autocrine TGF-β2 production. Exp Cell Res 2017; 350:132-139. [DOI: 10.1016/j.yexcr.2016.11.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 11/17/2016] [Accepted: 11/19/2016] [Indexed: 11/30/2022]
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25
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Toll-like receptor 4 signaling is required for clusterin-induced tumor necrosis factor-α secretion in macrophage. Biochem Biophys Res Commun 2017; 482:1407-1412. [DOI: 10.1016/j.bbrc.2016.12.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 12/07/2016] [Indexed: 11/17/2022]
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26
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Guo J, Guan Q, Liu X, Wang H, Gleave ME, Nguan CYC, Du C. Relationship of clusterin with renal inflammation and fibrosis after the recovery phase of ischemia-reperfusion injury. BMC Nephrol 2016; 17:133. [PMID: 27649757 PMCID: PMC5028988 DOI: 10.1186/s12882-016-0348-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 09/12/2016] [Indexed: 01/10/2023] Open
Abstract
Background Long-term outcomes after acute kidney injury (AKI) include incremental loss of function and progression towards chronic kidney disease (CKD); however, the pathogenesis of AKI to CKD remains largely unknown. Clusterin (CLU) is a chaperone-like protein that reduces ischemia-reperfusion injury (IRI) and enhances tissue repair after IRI in the kidney. This study investigated the role of CLU in the transition of IRI to renal fibrosis. Methods IRI was induced in the left kidneys of wild type (WT) C57BL/6J (B6) versus CLU knockout (KO) B6 mice by clamping the renal pedicles for 28 min at the body temperature of 32 °C. Tissue damage was examined by histology, infiltrate phenotypes by flow cytometry analysis, and fibrosis-related gene expression by PCR array. Results Reduction of kidney weight was induced by IRI, but was not affected by CLU KO. Both WT and KO kidneys had similar function with minimal cellular infiltration and fibrosis at day 14 of reperfusion. After 30 days, KO kidneys had greater loss in function than WT, indicated by the higher levels of both serum creatinine and BUN in KO mice, and exhibited more cellular infiltration (CD8 cells and macrophages), more tubular damage and more severe tissue fibrosis (glomerulopathy, interstitial fibrosis and vascular fibrosis). PCR array showed the association of CLU deficiency with up-regulation of CCL12, Col3a1, MMP9 and TIMP1 and down-regulation of EGF in these kidneys. Conclusion Our data suggest that CLU deficiency worsens renal inflammation and tissue fibrosis after IRI in the kidney, which may be mediated through multiple pathways. Electronic supplementary material The online version of this article (doi:10.1186/s12882-016-0348-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jia Guo
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada.,Department of Urology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Qiunong Guan
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Xiuheng Liu
- Department of Urology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Hao Wang
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Martin E Gleave
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver, BC, Canada
| | - Christopher Y C Nguan
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Caigan Du
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada. .,Department of Urologic Sciences, The University of British Columbia, VGH-Jack Bell Research Centre, 2660 Oak St, Vancouver, BC, V6H 3Z6, Canada.
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27
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Dairi G, Guan Q, Roshan-Moniri M, Collins CC, Ong CJ, Gleave ME, Nguan CYC, Du C. Transcriptome-Based Analysis of Molecular Pathways for Clusterin Functions in Kidney Cells. J Cell Physiol 2016; 231:2628-38. [PMID: 27155085 DOI: 10.1002/jcp.25415] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 05/02/2016] [Indexed: 12/15/2022]
Abstract
Clusterin (CLU) is a chaperone-like protein and plays a protective role against renal ischemia-reperfusion injury (IRI); however, the molecular pathways for its functions in the kidney are not fully understood. This study was designed to investigate CLU-mediating pathways in kidney cells by using bioinformatics analysis. CLU null renal tubular epithelial cells (TECs) expressing human CLU cDNA (TEC-CLU(hCLU) ) or empty vector (TEC-CLU(-/-) ) were exposed to normoxia or hypoxia (1% O2 ). Transcriptome profiling with a significant twofold change was performed using SurePrint G3 Mouse Gene Expression 8 × 60 K microarray, and the signaling pathways was ranked by using Ingenuity pathway analysis. Here, we showed that compared to CLU null controls, ectopic expression of human CLU in CLU null kidney cells promoted cell growth but inhibited migration in normoxia, and enhanced cell survival in hypoxia. CLU expression affected expression of 3864 transcripts (1893 up-regulated) in normoxia and 3670 transcripts (1925 up-regulated) in hypoxia. CLU functions in normoxia were associated mostly with AKT2/PPP2R2B-dependent PI3K/AKT, PTEN, VEGF, and ERK/MAPK signaling and as well with GSK3B-mediated cell cycle progression. In addition to unfolded protein response (UPR) and/or endoplasmic reticulum (ER) stress, CLU-enhanced cell survival in hypoxia was also associated with PIK3CD/MAPK1-dependent PI3K/AKT, HIF-α, PTEN, VEGF, and ERK/MAPK signaling. In conclusion, our data showed that CLU functions in kidney cells were mainly mediated in a cascade manner by PI3K/AKT, PTEN, VEGF, and ERK/MAPK signaling, and specifically by activation of UPR/ER stress in hypoxia, providing new insights into the protective role of CLU in the kidney. J. Cell. Physiol. 231: 2628-2638, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Ghida Dairi
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada.,Experimental Medicine Program, Graduate School, University of British Columbia, Vancouver, BC, Canada
| | - Qiunong Guan
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | | | - Colin C Collins
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver, BC, Canada
| | | | - Martin E Gleave
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver, BC, Canada
| | - Christopher Y C Nguan
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Caigan Du
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
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28
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Cassidy H, Slyne J, O'Kelly P, Traynor C, Conlon PJ, Johnston O, Slattery C, Ryan MP, McMorrow T. Urinary biomarkers of chronic allograft nephropathy. Proteomics Clin Appl 2016; 9:574-85. [PMID: 25951805 DOI: 10.1002/prca.201400200] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 04/23/2015] [Accepted: 05/05/2015] [Indexed: 12/21/2022]
Abstract
PURPOSE Chronic allograft nephropathy (CAN) is widely accepted as the leading cause of renal allograft loss after the first year post transplantation. This study aimed to identify urinary biomarkers that could predict CAN in transplant patients. EXPERIMENTAL DESIGN The study included 34 renal transplant patients with histologically proven CAN and 36 renal transplant patients with normal renal function. OrbiTrap MS was utilized to analysis a urinary fraction in order to identify other members of a previously identified biomarker tree . This novel biomarker pattern offers the potential to distinguish between transplant recipients with CAN and those with normal renal function. RESULTS The primary node of the biomarker pattern was reconfirmed as β2 microglobulin. Three other members of this biomarker pattern were identified: neutrophil gelatinase-associated lipocalin, clusterin, and kidney injury biomarker 1. Significantly higher urinary concentrations of these proteins were found in patients with CAN compared to those with normal kidney function. CONCLUSIONS AND CLINICAL RELEVANCE While further validation in a larger more-diverse patient population is required to determine if this biomarker pattern provides a potential means of diagnosing CAN by noninvasive methods in a clinical setting, this study clearly demonstrates the biomarkers' ability to stratify patients based on transplant function.
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Affiliation(s)
- Hilary Cassidy
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin, Ireland
| | - Jennifer Slyne
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin, Ireland
| | - Patrick O'Kelly
- Department of Nephrology & Transplantation, Beaumont Hospital, Beaumont, Dublin, Ireland
| | - Carol Traynor
- Nephrology Department, Mater Misercordiae University Hospital, Dublin, Ireland
| | - Peter J Conlon
- Department of Nephrology & Transplantation, Beaumont Hospital, Beaumont, Dublin, Ireland
| | - Olwyn Johnston
- Gordon & Leslie Diamond Centre, Division of Nephrology, University of British Columbia, Vancouver, Canada
| | - Craig Slattery
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin, Ireland
| | - Michael P Ryan
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin, Ireland
| | - Tara McMorrow
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin, Ireland
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29
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Lohkamp LN, Öllinger R, Chatzigeorgiou A, Illigens BMW, Siepmann T. Intraoperative biomarkers in renal transplantation. Nephrology (Carlton) 2016; 21:188-99. [DOI: 10.1111/nep.12556] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/29/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Laura-Nanna Lohkamp
- Department of Neurosurgery with Pediatric Neurosurgery; Charité-University Medicine, Campus Virchow; Berlin Germany
- Center for Clinical Research and Management Education; Division of Health Care Sciences; Dresden International University; Dresden Germany
| | - Robert Öllinger
- Department for General, Visceral and Transplantation Surgery; Charité-University Medicine, Campus Virchow; Berlin Germany
| | - Antonios Chatzigeorgiou
- Department of Clinical Pathobiochemistry; Medical Faculty Carl Gustav Carus Technische Universität Dresden; Dresden Germany
- Paul-Langerhans Institute Dresden; German Center for Diabetes Research; Dresden Germany
| | - Ben Min-Woo Illigens
- Center for Clinical Research and Management Education; Division of Health Care Sciences; Dresden International University; Dresden Germany
- Department of Neurology; University Hospital Carl Gustav Carus Technische Universität Dresden; Dresden Germany
| | - Timo Siepmann
- Center for Clinical Research and Management Education; Division of Health Care Sciences; Dresden International University; Dresden Germany
- Department of Neurology; Beth Israel Deaconess Medical Center; Harvard Medical School; Boston Massachusetts USA
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30
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Fedoseeva LA, Ryazanova MA, Ershov NI, Markel AL, Redina OE. Comparative transcriptional profiling of renal cortex in rats with inherited stress-induced arterial hypertension and normotensive Wistar Albino Glaxo rats. BMC Genet 2016; 17 Suppl 1:12. [PMID: 26821914 PMCID: PMC4895253 DOI: 10.1186/s12863-015-0306-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Background The renal function plays a leading role in long-term control of arterial pressure. The comparative analysis of renal cortex transcriptome in ISIAH rats with inherited stress-induced arterial hypertension and normotensive WAG rats was performed using RNA-Seq approach. The goal of the study was to identify the differentially expressed genes (DEGs) related to hypertension and to detect the pathways contributing to the differences in renal functions in ISIAH and WAG rats. Results The analysis revealed 716 genes differentially expressed in renal cortex of ISIAH and WAG rats, 42 of them were associated with arterial hypertension and regulation of blood pressure (BP). Several Gene Ontology (GO) terms significantly enriched with DEGs suggested the existence of the hormone dependent interstrain differences in renal cortex function. Multiple DEGs were associated with regulation of blood pressure and blood circulation, with the response to stress (including oxidative stress, hypoxia, and fluid shear stress) and its regulation. Several other processes which may contribute to hypertension development in ISIAH rats were: ion transport, regulation of calcium ion transport, homeostatic process, tissue remodeling, immune system process and regulation of immune response. KEGG analysis marked out several pathways significantly enriched with DEGs related to immune system function, to steroid hormone biosynthesis, tryptophan, glutathione, nitrogen, and drug metabolism. Conclusions The results of the study provide a basis for identification of potential biomarkers of stress-sensitive hypertension and for further investigation of the mechanisms that affect renal cortex function and hypertension development. Electronic supplementary material The online version of this article (doi:10.1186/s12863-015-0306-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Larisa A Fedoseeva
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation.
| | - Marina A Ryazanova
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation.
| | - Nikita I Ershov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation.
| | - Arcady L Markel
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation. .,Novosibirsk State University, Novosibirsk, Russian Federation.
| | - Olga E Redina
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation.
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31
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Alnasser HA, Guan Q, Zhang F, Gleave ME, Nguan CYC, Du C. Requirement of clusterin expression for prosurvival autophagy in hypoxic kidney tubular epithelial cells. Am J Physiol Renal Physiol 2016; 310:F160-73. [DOI: 10.1152/ajprenal.00304.2015] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 11/05/2015] [Indexed: 02/08/2023] Open
Abstract
Cellular autophagy is a prosurvival mechanism in the kidney against ischemia-reperfusion injury (IRI), but the molecular pathways that activate the autophagy in ischemic kidneys are not fully understood. Clusterin (CLU) is a chaperone-like protein, and its expression is associated with kidney resistance to IRI. The present study investigated the role of CLU in prosurvival autophagy in the kidney. Renal IRI was induced in mice by clamping renal pedicles at 32°C for 45 min. Hypoxia in renal tubular epithelial cell (TEC) cultures was induced by exposure to a 1% O2 atmosphere. Autophagy was determined by either light chain 3-BII expression with Western blot analysis or light chain 3-green fluorescent protein aggregation with confocal microscopy. Cell apoptosis was determined by flow cytometric analysis. The unfolded protein response was determined by PCR array. Here, we showed that autophagy was significantly activated by IRI in wild-type (WT) but not CLU-deficient kidneys. Similarly, autophagy was activated by hypoxia in human proximal TECs (HKC-8) and WT mouse primary TECs but was impaired in CLU-null TECs. Hypoxia-activated autophagy was CLU dependent and positively correlated with cell survival, and inhibition of autophagy significantly promoted cell death in both HKC-8 and mouse WT/CLU-expressing TECs but not in CLU-null TECs. Further experiments showed that CLU-dependent prosurvival autophagy was associated with activation of the unfolded protein response in hypoxic kidney cells. In conclusion, these data suggest that activation of prosurvival autophagy by hypoxia in kidney cells requires CLU expression and may be a key cytoprotective mechanism of CLU in the protection of the kidney from hypoxia/ischemia-mediated injury.
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Affiliation(s)
- Hatem A. Alnasser
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Qiunong Guan
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, British Columbia, Canada; and
| | - Fan Zhang
- Vancouver Prostate Centre, Vancouver, British Columbia, Canada
| | - Martin E. Gleave
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- Vancouver Prostate Centre, Vancouver, British Columbia, Canada
| | - Christopher Y. C. Nguan
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Caigan Du
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, British Columbia, Canada; and
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Wei W, Huang XH, Liang D, Zeng YY, Ma C, Wu YB, Li YT, Zhang X, Zeng JH, Liu JF. A proteomic analysis of transplanted liver in a rat model of chronic rejection. Clin Res Hepatol Gastroenterol 2015; 39:340-50. [PMID: 25468549 DOI: 10.1016/j.clinre.2014.10.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 07/29/2014] [Accepted: 10/03/2014] [Indexed: 02/04/2023]
Abstract
BACKGROUND Chronic rejection (CR) is an important cause of liver allograft failure. In the latter condition, re-transplantation of the liver (ReLT) is the only option for survival. Unfortunately, with the current state of knowledge, it is difficult to diagnose and treat early CR. OBJECTIVE To explore the biomarkers of the chronic rejection in orthotopic liver transplantation (OLT). METHODS A rat model of chronic liver allograft rejection was established, and the differential protein expression in chronic allograft rejection (CR) was analyzed by iTRAQ-MALDI-TOF/TOF. RESULTS Expression of sixty-two proteins was found to be significantly changed in CR rats. In the present study, CLU, Lcn2 and Krt19 were identified and quantified as early and reliable biomarkers for chronic rejection. CONCLUSION Analysis of differential protein expression by iTRAQ-MALDI-TOF/TOF is a potentially effective method to help understand the mechanism of CR in orthotopic liver transplantation. The proteins CLU, Lcn2 and Krt19 might be potential prognostic markers for predicting chronic rejection after liver transplantation.
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Affiliation(s)
- Wei Wei
- The First Clinical Medical College of Fujian Medical University, Fuzhou, Fujian, China
| | - Xin-Hui Huang
- Liver Disease Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Dong Liang
- Liver Disease Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Yong-Yi Zeng
- Liver Disease Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Chuang Ma
- Liver Disease Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Yan-Bin Wu
- Liver Disease Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Yun-Tong Li
- Liver Disease Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Xiang Zhang
- Liver Disease Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Jin-Hua Zeng
- Liver Disease Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Jing-Feng Liu
- Liver Disease Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China.
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Calcium oxalate calculi-induced clusterin expression in kidney. Urolithiasis 2015; 43:411-8. [PMID: 25993895 DOI: 10.1007/s00240-015-0785-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 05/12/2015] [Indexed: 12/30/2022]
Abstract
The aim of the study was to investigate clusterin expression in the kidney and evaluate the urine clusterin level in the kidney stone formers. (1) In vitro, we treated the Madin-Darby canine kidney (MDCK) cell line with different concentrations of calcium oxalate (CaOx), and then the clusterin protein expression in the cells was evaluated by Western blotting. (2) Kidney stone patients who received percutaneous nephrolithotomy were enrolled in our study. Urine samples were collected before surgery, the kidney punctured to obtain kidney tissue guided by ultrasound intraoperatively. Clusterin expression in the human kidney tissue was evaluated by immunochemistry. The urine clusterin level was determined by enzyme-linked immunosorbent assay. Non-kidney disease subjects were chosen as controls. In vitro, the clusterin expression was up-regulated in the MDCK cells induced by CaOx. The study included 49 patients and 41 non-kidney disease subjects. All calculi were composed of calcium oxalate monohydrate or calcium oxalate dihydrate and a few also contained protein or uric acid. Mean ± SD urine clusterin level was 17.47 ± 18.61 μg/ml in patients, and 3.31 ± 5.42 μg/ml in non-kidney disease subjects, respectively (p < 0.001). Immunohistochemistry revealed the clusterin was located in the cytoplasm of the renal distal and collecting tubular epithelial cells. Also the tissue clusterin expression increased significantly in the kidney stone formers compared to the control groups (p = 0.001). CaOx could induce clusterin expression in renal tubular cells, and increase clusterin levels in the kidney and urine from the kidney stone formers.
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Clusterin in kidney transplantation: novel biomarkers versus serum creatinine for early prediction of delayed graft function. Transplantation 2015; 99:171-9. [PMID: 25083615 DOI: 10.1097/tp.0000000000000256] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND OBJECTIVES Current methods for rapid detection of delayed graft function (DGF) after kidney transplantation are unreliable. Urinary clusterin is a biomarker of kidney injury but its utility for prediction of graft dysfunction is unknown. METHODS In a single-center, prospective cohort study of renal transplant recipients (N=81), urinary clusterin was measured serially between 4 hr and 7 days after transplantation. The utility of clusterin for prediction of DGF (hemodialysis within 7 days of transplantation) was compared with urinary interleukin (IL)-18, neutrophil gelatinase-associated lipocalin (NGAL), kidney injury molecule-1, serum creatinine, and clinical variables. RESULTS At 4 hr after reperfusion, anuria was highly specific, but of low sensitivity for detection of DGF. At 4 hr, receiver operating characteristic analysis suggested that urinary clusterin, IL-18, kidney injury molecule-1, and NGAL concentration were predictive of DGF. After adjusting for preoperative clinical variables and anuria, clusterin and IL-18 independently enhanced the clinical model for prediction of DGF. Kidney injury molecule-1 only modestly improved the prediction of DGF, whereas NGAL, serum creatinine, and the creatinine reduction ratio did not improve on the clinical model. At 12 hr, the creatinine reduction ratio independently predicted DGF. CONCLUSION Both urinary clusterin and IL-18 are useful biomarkers and may allow triaging of patients with DGF within 4 hr of transplantation. Relative performance of biomarkers for prediction of graft function is time-dependant. Early and frequent measurements of serum creatinine and calculation of the creatinine reduction ratio also predict DGF within 12 hr of reperfusion.
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Zhang A, Uaesoontrachoon K, Shaughnessy C, Das JR, Rayavarapu S, Brown KJ, Ray PE, Nagaraju K, van den Anker JN, Hoffman EP, Hathout Y. The use of urinary and kidney SILAM proteomics to monitor kidney response to high dose morpholino oligonucleotides in the mdx mouse. Toxicol Rep 2015. [PMID: 26213685 PMCID: PMC4512206 DOI: 10.1016/j.toxrep.2015.05.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Phosphorodiamidate morpholino oligonucleotides (PMO) are used as a promising exon-skipping gene therapy for Duchenne Muscular Dystrophy (DMD). One potential complication of high dose PMO therapy is its transient accumulation in the kidneys. Therefore new urinary biomarkers are needed to monitor this treatment. Here, we carried out a pilot proteomic profiling study using stable isotope labeling in mammals (SILAM) strategy to identify new biomarkers to monitor the effect of PMO on the kidneys of the dystrophin deficient mouse model for DMD (mdx-23). We first assessed the baseline renal status of the mdx-23 mouse compared to the wild type (C57BL10) mouse, and then followed the renal outcome of mdx-23 mouse treated with a single high dose intravenous PMO injection (800 mg/kg). Surprisingly, untreated mdx-23 mice showed evidence of renal injury at baseline, which was manifested by albuminuria, increased urine output, and changes in established urinary biomarker of acute kidney injury (AKI). The PMO treatment induced further transient renal injury, which peaked at 7 days, and returned to almost the baseline status at 30 days post-treatment. In the kidney, the SILAM approach followed by western blot validation identified changes in Meprin A subunit alpha at day 2, then returned to normal levels at day 7 and 30 after PMO injection. In the urine, SILAM approach identified an increase in Clusterin and γ-glutamyl transpeptidase 1 as potential candidates to monitor the transient renal accumulation of PMO. These results, which were confirmed by Western blots or ELISA, demonstrate the value of the SILAM approach to identify new candidate biomarkers of renal injury in mdx-23 mice treated with high dose PMO. Chemical compounds studied in this article: Phosphorodiamidate morpholino (PubChem CID: 22140692); isoflurane (PubChem CID: 3763); formic acid (PubChem CID: 284); acetonitrile (PubChem CID: 6342); acetone (PubChem CID: 180); methanol (PubChem CID: 887).
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Affiliation(s)
- Aiping Zhang
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - Kitipong Uaesoontrachoon
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - Conner Shaughnessy
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - Jharna R Das
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - Sree Rayavarapu
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - Kristy J Brown
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - Patricio E Ray
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - Kanneboyina Nagaraju
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - John N van den Anker
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - Eric P Hoffman
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
| | - Yetrib Hathout
- The Centers for Genetic Medicine Research and Translational Science, Children's Research Institute, Children's National Medical Center, 111 Michigan Avenue, NW, Washington, DC 20010, USA
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Redina OE, Smolenskaya SE, Abramova TO, Ivanova LN, Markel AL. Differential transcriptional activity of kidney genes in hypertensive ISIAH and normotensive WAG rats. Clin Exp Hypertens 2014; 37:249-59. [PMID: 25285356 DOI: 10.3109/10641963.2014.954711] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Transcriptional activity of the kidney genes was compared in hypertensive ISIAH and normotensive WAG rats using the oligonucleotide microarray technique. Most of differentially expressed genes were downregulated in ISIAH kidney both in renal cortex and medulla. According to functional annotation the kidney function in ISIAH rats is based on altered expression of many genes working in stress-related mode. The alterations in gene expression are likely related to both pathophysiological and compensatory mechanisms. The further studies of genes differentially expressed in ISIAH and WAG kidney will help to reveal new hypertensive genes and mechanisms specific for stress-induced arterial hypertension.
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Affiliation(s)
- Olga Evgenievna Redina
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences , Novosibirsk , Russian Federation
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Lee SH, Choi J, Kim H, Lee DH, Roh GS, Kim HJ, Kang SS, Choi WS, Cho GJ. FK506 reduces calpain-regulated calcineurin activity in both the cytoplasm and the nucleus. Anat Cell Biol 2014; 47:91-100. [PMID: 24987545 PMCID: PMC4076426 DOI: 10.5115/acb.2014.47.2.91] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 05/30/2014] [Accepted: 06/03/2014] [Indexed: 12/25/2022] Open
Abstract
Excessive immune responses induced by ischemia-reperfusion injury (IRI) are known to lead to necrotic and apoptotic cell death, and calcineurin plays a major role in this process. Calcineurin dephosphorylates the nuclear factor of activated T-cells (NFAT), permitting its translocation into the nucleus. As a result, calcineurin promotes the release of pro-inflammatory cytokines, such as tumor necrosis factor-α. The overproduction of pro-inflammatory cytokines causes renal cell death. Calcineurin activity is regulated by calpain, a cysteine protease present in the nucleus. Calpain-mediated proteolysis increases the phosphatase activity of calcineurin, resulting in NFAT dephosphorylation. This process has been studied in cardiomyocytes but its role in renal IRI is unknown. Thus, we examined whether calpain regulates calcineurin in renal tubule nuclei. We established an in vivo renal IRI model in mice and identified the protective role of a calcineurin inhibitor, FK506, in this process. Calcineurin is expressed in the nucleus, where it is present in its calpain-cleaved form. FK506 reduced nuclear expression of calcineurin and prevented calcineurin-mediated NFAT activation. Our study shows clearly that FK506 reduces calpain-mediated calcineurin activity. Consequently, calcineurin could not maintain NFAT activation. FK506 reduced renal cell death by suppressing the transcription of pro-inflammatory cytokine genes. This study provides evidence that FK506 protects against inflammation in a renal IRI mouse model. We also provided a mechanism of calcineurin action in the nucleus. Therefore, FK506 could improve renal function by decreasing calcineurin activity in both the cytoplasm and the nucleus of renal tubule cells.
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Affiliation(s)
- Sun Hee Lee
- Department of Anatomy and Neurobiology, Institute of Health Sciences, Medical Research Center for Neural Dysfunction, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jungil Choi
- Department of Anatomy and Neurobiology, Institute of Health Sciences, Medical Research Center for Neural Dysfunction, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Hwajin Kim
- Department of Anatomy and Neurobiology, Institute of Health Sciences, Medical Research Center for Neural Dysfunction, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Dong Hoon Lee
- Department of Anatomy and Neurobiology, Institute of Health Sciences, Medical Research Center for Neural Dysfunction, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Gu Seob Roh
- Department of Anatomy and Neurobiology, Institute of Health Sciences, Medical Research Center for Neural Dysfunction, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Hyun Joon Kim
- Department of Anatomy and Neurobiology, Institute of Health Sciences, Medical Research Center for Neural Dysfunction, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Sang Soo Kang
- Department of Anatomy and Neurobiology, Institute of Health Sciences, Medical Research Center for Neural Dysfunction, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Wan Sung Choi
- Department of Anatomy and Neurobiology, Institute of Health Sciences, Medical Research Center for Neural Dysfunction, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Gyeong Jae Cho
- Department of Anatomy and Neurobiology, Institute of Health Sciences, Medical Research Center for Neural Dysfunction, Gyeongsang National University School of Medicine, Jinju, Korea
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Gao X, Wu J, Qian Y, Fu L, Wu G, Xu C, Mei C. Oxidized high-density lipoprotein impairs the function of human renal proximal tubule epithelial cells through CD36. Int J Mol Med 2014; 34:564-72. [PMID: 24919723 DOI: 10.3892/ijmm.2014.1799] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 05/29/2014] [Indexed: 11/06/2022] Open
Abstract
Unlike native high-density lipoprotein (HDL), oxidized HDL exerts adverse effects in a number of diseases, including chronic kidney disease (CKD); however, the mechanisms involved in this process remain unclear. In the present study, we investigated the effects of oxidized HDL on renal tubular cells, which play an important role in the progression of CKD. Human renal proximal tubule epithelial cells (HK-2) were cultured and stimulated with various concentrations of oxidized HDL in the absence or presence of CD36 siRNA. The results revealed that oxidized HDL enhanced the production of reactive oxygen species (ROS) and upregulated the expression of pro-inflammatory factors in the HK-2 cells in a dose-dependent manner. Incubation with oxidized HDL also increased the apoptosis of the HK-2 cells and reduced their migration ability in a dose‑dependent manner. Src family kinase, mitogen-activated protein kinase (MAPK) and nuclear factor-κB (NF-κB) were activated following stimulation with oxidized HDL. All these effects mediated by oxidized HDL on HK-2 cells were markedly attenuated by transfection with with CD36 siRNA pior to stimulation with oxidized HDL. These findings suggest that oxidized HDL enhances the pro-inflammatory properties and impairs the function of HK-2 cells, mainly through the scavenger receptor, CD36, as well as through the Src, MAPK and NF-κB pathways.
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Affiliation(s)
- Xiang Gao
- Kidney Institute of PLA, Department of Medicine, Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Jianxiang Wu
- Carder's Ward, No. 411 Hospital of PLA, Shanghai 200081, P.R. China
| | - Yixin Qian
- Kidney Institute of PLA, Department of Medicine, Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Lili Fu
- Kidney Institute of PLA, Department of Medicine, Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Guiqun Wu
- Kidney Institute of PLA, Department of Medicine, Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Chenggang Xu
- Kidney Institute of PLA, Department of Medicine, Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Changlin Mei
- Kidney Institute of PLA, Department of Medicine, Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
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Nguan CYC, Guan Q, Gleave ME, Du C. Promotion of cell proliferation by clusterin in the renal tissue repair phase after ischemia-reperfusion injury. Am J Physiol Renal Physiol 2014; 306:F724-33. [DOI: 10.1152/ajprenal.00410.2013] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Renal repair begins soon after the kidney suffers ischemia-reperfusion injury (IRI); however, its molecular pathways are not fully understood. Clusterin (Clu) is a chaperone protein with cytoprotective functions in renal IRI. The aim of this study was to investigate the role of Clu in renal repair after IRI. IRI was induced in the left kidneys of wild-type (WT) C57BL/6J (B6) vs. Clu knockout (KO) B6 mice by clamping the renal pedicles for 28–45 min at the body temperature of 32°C. The renal repair was assessed by histology and confirmed by renal function. Gene expression was examined using PCR array. Here, we show that following IRI, renal tubular damage and Clu expression in WT kidneys were induced at day 1, reached the maximum at day 3, and significantly diminished at day 7 along with normal function, whereas the tubular damage in Clu KO kidneys steadily increased from initiation of insult to the end of the experiment, when renal failure occurred. Renal repair in WT kidneys was positively correlated with an increase in Ki67+ proliferative tubular cells and survival from IRI. The functions of Clu in renal repair and renal tubular cell proliferation in cultures were associated with upregulation of a panel of genes that could positively regulate cell cycle progression and DNA damage repair, which might promote cell proliferation but not involve cell migration. In conclusion, these data suggest that Clu is required for renal tissue regeneration in the kidney repair phase after IRI, which is associated with promotion of tubular cell proliferation.
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Affiliation(s)
- Christopher Y. C. Nguan
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Qiunong Guan
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Martin E. Gleave
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- Vancouver Prostate Centre, Vancouver, British Columbia, Canada; and
| | - Caigan Du
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, British Columbia, Canada
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Mahadevappa R, Nielsen R, Christensen EI, Birn H. Megalin in acute kidney injury: foe and friend. Am J Physiol Renal Physiol 2013; 306:F147-54. [PMID: 24197071 DOI: 10.1152/ajprenal.00378.2013] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The kidney proximal tubule is a key target in many forms of acute kidney injury (AKI). The multiligand receptor megalin is responsible for the normal proximal tubule uptake of filtered molecules, including nephrotoxins, cytokines, and markers of AKI. By mediating the uptake of nephrotoxins, megalin plays an essential role in the development of some types of AKI. However, megalin also mediates the tubular uptake of molecules implicated in the protection against AKI, and changes in megalin expression have been demonstrated in AKI in animal models. Thus, modulation of megalin expression in response to AKI may be an important part of the tubule cell adaption to cellular protection and regeneration and should be further investigated as a potential target of intervention. This review explores current evidence linking megalin expression and function to the development, diagnosis, and progression of AKI as well as renal protection against AKI.
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Affiliation(s)
- Ravikiran Mahadevappa
- Dept. of Biomedicine, Aarhus Univ., Wilhelm Meyers Allé 3, Bldg. 1234, Aarhus DK-8000, Denmark.
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Proximal renal tubular injury in rats sub-chronically exposed to low fluoride concentrations. Toxicol Appl Pharmacol 2013; 272:888-94. [DOI: 10.1016/j.taap.2013.07.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 07/26/2013] [Accepted: 07/29/2013] [Indexed: 12/27/2022]
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Mishima K, Inoue H, Nishiyama T, Mabuchi Y, Amano Y, Ide F, Matsui M, Yamada H, Yamamoto G, Tanaka J, Yasuhara R, Sakurai T, Lee MCI, Chiba K, Sumimoto H, Kawakami Y, Matsuzaki Y, Tsubota K, Saito I. Transplantation of side population cells restores the function of damaged exocrine glands through clusterin. Stem Cells 2012; 30:1925-37. [DOI: 10.1002/stem.1173] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Schlatzer D, Maahs DM, Chance MR, Dazard JE, Li X, Hazlett F, Rewers M, Snell-Bergeon JK. Novel urinary protein biomarkers predicting the development of microalbuminuria and renal function decline in type 1 diabetes. Diabetes Care 2012; 35:549-55. [PMID: 22238279 PMCID: PMC3322681 DOI: 10.2337/dc11-1491] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To define a panel of novel protein biomarkers of renal disease. RESEARCH DESIGN AND METHODS Adults with type 1 diabetes in the Coronary Artery Calcification in Type 1 Diabetes study who were initially free of renal complications (n = 465) were followed for development of micro- or macroalbuminuria (MA) and early renal function decline (ERFD, annual decline in estimated glomerular filtration rate of ≥3.3%). The label-free proteomic discovery phase was conducted in 13 patients who progressed to MA by the 6-year visit and 11 control subjects, and four proteins (Tamm-Horsfall glycoprotein, α-1 acid glycoprotein, clusterin, and progranulin) identified in the discovery phase were measured by enzyme-linked immunosorbent assay in 74 subjects: group A, normal renal function (n = 35); group B, ERFD without MA (n = 15); group C, MA without ERFD (n = 16); and group D, both ERFD and MA (n = 8). RESULTS In the label-free analysis, a model of progression to MA was built using 252 peptides, yielding an area under the curve (AUC) of 84.7 ± 5.3%. In the validation study, ordinal logistic regression was used to predict development of ERFD, MA, or both. A panel including Tamm-Horsfall glycoprotein (odds ratio 2.9, 95% CI 1.3-6.2, P = 0.008), progranulin (1.9, 0.8-4.5, P = 0.16), clusterin (0.6, 0.3-1.1, P = 0.09), and α-1 acid glycoprotein (1.6, 0.7-3.7, P = 0.27) improved the AUC from 0.841 to 0.889. CONCLUSIONS A panel of four novel protein biomarkers predicted early renal damage in type 1 diabetes. These findings require further validation in other populations for prediction of renal complications and treatment monitoring.
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Affiliation(s)
- Daniela Schlatzer
- Center for Proteomics, Case Western Reserve University, Cleveland, Ohio, USA
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Yanaba K, Asano Y, Tada Y, Sugaya M, Kadono T, Sato S. A possible contribution of elevated serum clusterin levels to the inhibition of digital ulcers and pulmonary arterial hypertension in systemic sclerosis. Arch Dermatol Res 2012; 304:459-63. [DOI: 10.1007/s00403-012-1219-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/22/2012] [Accepted: 01/26/2012] [Indexed: 11/30/2022]
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Rae FK, Suhaimi N, Li J, Nastasi T, Slonimsky E, Rosenthal N, Little MH. Proximal tubule overexpression of a locally acting IGF isoform, Igf-1Ea, increases inflammation after ischemic injury. Growth Horm IGF Res 2012; 22:6-16. [PMID: 22197584 DOI: 10.1016/j.ghir.2011.11.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 08/29/2011] [Accepted: 11/29/2011] [Indexed: 10/14/2022]
Abstract
OBJECTIVE IGF-1 is an important regulator of postnatal growth in mammals. In mice, a non-circulating, locally acting isoform of IGF-1, IGF-1Ea, has been documented as a central regulator of muscle regeneration and has been shown to improve repair in the heart and skin. In this study, we examine whether local production of IGF1-Ea protein improves tubular repair after renal ischemia reperfusion injury. DESIGN Transgenic mice in which the proximal-tubule specific promoter Sglt2 was driving the expression of an Igf-1Ea transgene. These animals were treated with an ischemic-reperfusion injury and the response at 24h and 5days compared with wildtype littermates. RESULTS Transgenic mice demonstrated rapid and enhanced renal injury in comparison to wild type mice. Five days after injury the wild type and low expressing Igf-1Ea transgenic mice showed significant tubular recovery, while high expressing Igf-1Ea transgenic mice displayed significant tubular damage. This marked injury was accompanied by a two-fold increase in the number of F4/80 positive macrophages and a three-fold increase in the number of Gr1-positive neutrophils in the kidney. At the molecular level, Igf-1Ea expression resulted in significant up-regulation of proinflammatory cytokines such as TNF-α and Ccl2. Expression of Nfatc1 was also delayed, suggesting reduced tubular proliferation after kidney injury. CONCLUSIONS These data indicate that, unlike the muscle, heart and skin, elevated levels of IGF-1Ea in the proximal tubules exacerbates ischemia reperfusion injury resulting in increased recruitment of macrophages and neutrophils and delays repair in a renal setting.
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Affiliation(s)
- Fiona K Rae
- Institute for Molecular Bioscience, Queensland Bioscience Precinct, The University of Queensland, St. Lucia 4072, Australia
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Li S, Guan Q, Chen Z, Gleave ME, Nguan CYC, Du C. Reduction of cold ischemia-reperfusion injury by graft-expressing clusterin in heart transplantation. J Heart Lung Transplant 2011; 30:819-26. [PMID: 21515078 DOI: 10.1016/j.healun.2011.03.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 02/01/2011] [Accepted: 03/06/2011] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Cold ischemia-reperfusion injury (IRI) is a major factor for early graft dysfunction and is associated with rejection episodes in heart transplantation. Clusterin (CLU) is a cytoprotective protein with chaperone activity. This study was designed to examine the impact of donor-expressing CLU on cold IRI. METHODS Donor hearts from wild-type C57BL/6J (H-2(b); B6 WT) vs CLU knockout C57BL/6J (H-2(b); B6 KO) mice were stored at 4°C for 8 hours, followed by heterotopic transplantation to B6 WT mice. The functional recovery of heart grafts was determined by scoring palpation, and tissue injury was determined by release of creatine kinase (CK) and lactate dehydrase (LDH) and also by histology. RESULTS Heart cells constitutively expressed CLU, and mature CLU protein was localized mostly in the endothelium as well as on the cell surface of cardiac myocytes. As compared with CLU-deficient hearts, WT hearts were more resistant to cold injury during cold preservation, and had a better functional recovery after prolonged cold preservation and transplantation. The improved graft function of CLU-expressing grafts correlated significantly with reduced neutrophil infiltration and cardiac injury, including myocytic apoptosis and necrosis. Furthermore, in vitro examination showed that ectopic expression of CLU in cultured myocytes increased cell membrane stability after exposure to cold temperature and prevented cell death. CONCLUSIONS CLU expression renders donor hearts resistance to cold IRI in transplantation, suggesting that upregulation of CLU expression in donor hearts may have potential for protecting heart grafts from cold IRI.
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Affiliation(s)
- Shuyuan Li
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
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