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Renal Protective Effect of Beluga Lentil Pretreatment for Ischemia-Reperfusion Injury. BIOMED RESEARCH INTERNATIONAL 2021; 2021:6890679. [PMID: 33604384 PMCID: PMC7868138 DOI: 10.1155/2021/6890679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 12/24/2020] [Accepted: 01/12/2021] [Indexed: 11/18/2022]
Abstract
Materials and Methods Mice were divided into four groups: normal, untreated, low- (2 mg), and high-dose (8 mg) beluga lentil treatment groups. Beluga lentil was orally administered for 2 weeks, followed by bilateral renal ischemia for 20 min and reperfusion for 30 min. Blood samples and kidney tissues were collected and analyzed to investigate renal function, histopathology, epithelial and endothelial cell damage, apoptosis, oxidative stress, and inflammatory responses. Results The pretreated groups maintained renal function, with significantly lower blood urea nitrogen (BUN) and creatinine levels, compared with the other groups. The histopathological analysis showed reduced proximal tubule injury and decreased injury-related molecule (kidney injury molecule 1 (KIM-1) and neutrophil gelatinase-associated lipocalin (NGAL)) secretion in the pretreated groups compared with the other groups. Terminal deoxynucleotidyl transferase dUTP nick-end labeling- (TUNEL-) positive cells and the secretion of apoptosis-related molecules (Fas and caspase 3) were significantly reduced in the pretreated groups compared with the other groups. The pretreated groups showed positive microvessel-associated gene (cluster of differentiation (CD31)) expression and negative adhesion molecule (intracellular adhesion molecule 1 (ICAM-1)) expression. An antioxidant effect was observed in the pretreatment groups, with reduced malonaldehyde (MDA) expression and increased antioxidant enzyme (superoxide dismutase (SOD), catalase (CAT), glutathione (GSH), and glutathione peroxidase (GPx)) secretion. In the pretreated groups, F4/80+ macrophages and CD4+ T cell infiltration were inhibited and proinflammatory cytokine (interleukin- (IL-) 1β, IL-6, and tumor necrosis factor- (TNF-) α) levels decreased; however, the levels of anti-inflammatory cytokines (transforming growth factor- (TGF-) β, IL-10, and IL-22) increased. Conclusions Beluga lentil pretreatment demonstrated protective effects against I/R-induced renal damage, via antiapoptotic, anti-inflammatory, and antioxidant activities.
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HIF in Nephrotoxicity during Cisplatin Chemotherapy: Regulation, Function and Therapeutic Potential. Cancers (Basel) 2021; 13:cancers13020180. [PMID: 33430279 PMCID: PMC7825709 DOI: 10.3390/cancers13020180] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/27/2020] [Accepted: 01/05/2021] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Cisplatin is a widely used chemotherapy drug, but its use and efficacy are limited by its nephrotoxicity. HIF has protective effects against kidney injury during cisplatin chemotherapy, but it may attenuate the anti-cancer effect of cisplatin. In this review, we describe the role and regulation of HIF in cisplatin-induced nephrotoxicity and highlight the therapeutic potential of targeting HIF in chemotherapy. Abstract Cisplatin is a highly effective, broad-spectrum chemotherapeutic drug, yet its clinical use and efficacy are limited by its side effects. Particularly, cancer patients receiving cisplatin chemotherapy have high incidence of kidney problems. Hypoxia-inducible factor (HIF) is the “master” transcription factor that is induced under hypoxia to trans-activate various genes for adaptation to the low oxygen condition. Numerous studies have reported that HIF activation protects against AKI and promotes kidney recovery in experimental models of cisplatin-induced acute kidney injury (AKI). In contrast, little is known about the effects of HIF on chronic kidney problems following cisplatin chemotherapy. Prolyl hydroxylase (PHD) inhibitors are potent HIF inducers that recently entered clinical use. By inducing HIF, PHD inhibitors may protect kidneys during cisplatin chemotherapy. However, HIF activation by PHD inhibitors may reduce the anti-cancer effect of cisplatin in tumors. Future studies should test PHD inhibitors in tumor-bearing animal models to verify their effects in kidneys and tumors.
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Abstract
Complex multicellular life in mammals relies on functional cooperation of different organs for the survival of the whole organism. The kidneys play a critical part in this process through the maintenance of fluid volume and composition homeostasis, which enables other organs to fulfil their tasks. The renal endothelium exhibits phenotypic and molecular traits that distinguish it from endothelia of other organs. Moreover, the adult kidney vasculature comprises diverse populations of mostly quiescent, but not metabolically inactive, endothelial cells (ECs) that reside within the kidney glomeruli, cortex and medulla. Each of these populations supports specific functions, for example, in the filtration of blood plasma, the reabsorption and secretion of water and solutes, and the concentration of urine. Transcriptional profiling of these diverse EC populations suggests they have adapted to local microenvironmental conditions (hypoxia, shear stress, hyperosmolarity), enabling them to support kidney functions. Exposure of ECs to microenvironment-derived angiogenic factors affects their metabolism, and sustains kidney development and homeostasis, whereas EC-derived angiocrine factors preserve distinct microenvironment niches. In the context of kidney disease, renal ECs show alteration in their metabolism and phenotype in response to pathological changes in the local microenvironment, further promoting kidney dysfunction. Understanding the diversity and specialization of kidney ECs could provide new avenues for the treatment of kidney diseases and kidney regeneration.
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104
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Sex diversity in proximal tubule and endothelial gene expression in mice with ischemic acute kidney injury. Clin Sci (Lond) 2020; 134:1887-1909. [PMID: 32662516 DOI: 10.1042/cs20200168] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 07/09/2020] [Accepted: 07/10/2020] [Indexed: 12/22/2022]
Abstract
Female sex protects against development of acute kidney injury (AKI). While sex hormones may be involved in protection, the role of differential gene expression is unknown. We conducted gene profiling in male and female mice with or without kidney ischemia-reperfusion injury (IRI). Mice underwent bilateral renal pedicle clamping (30 min), and tissues were collected 24 h after reperfusion. RNA-sequencing (RNA-Seq) was performed on proximal tubules (PTs) and kidney endothelial cells. Female mice were resistant to ischemic injury compared with males, determined by plasma creatinine and neutrophil gelatinase-associated lipocalin (NGAL), histologic scores, neutrophil infiltration, and extent of apoptosis. Sham mice had sex-specific gene disparities in PT and endothelium, and male mice showed profound gene dysregulation with ischemia-reperfusion compared with females. After ischemia PTs from females exhibited smaller increases compared with males in injury-associated genes lipocalin-2 (Lcn2), hepatitis A virus cellular receptor 1 (Havcr1), and keratin 18 (Krt18), and no up-regulation of SRY-Box transcription factor 9 (Sox9) or keratin 20 (Krt20). Endothelial up-regulation of adhesion molecules and cytokines/chemokines occurred in males, but not females. Up-regulated genes in male ischemic PTs were linked to tumor necrosis factor (TNF) and Toll-like receptor (TLR) pathways, while female ischemic PTs showed up-regulated genes in pathways related to transport. The data highlight sex-specific gene expression differences in male and female PTs and endothelium before and after ischemic injury that may underlie disparities in susceptibility to AKI.
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de Caestecker M. CDKL5: a promising new therapeutic target for acute kidney injury? Am J Physiol Renal Physiol 2020; 319:F865-F867. [PMID: 33073588 DOI: 10.1152/ajprenal.00535.2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Mark de Caestecker
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
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106
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Kim JY, Bai Y, Jayne LA, Cianciolo RE, Bajwa A, Pabla NS. Involvement of the CDKL5-SOX9 signaling axis in rhabdomyolysis-associated acute kidney injury. Am J Physiol Renal Physiol 2020; 319:F920-F929. [PMID: 33044867 DOI: 10.1152/ajprenal.00429.2020] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Acute kidney injury (AKI) is a common clinical syndrome associated with adverse short- and long-term sequelae. Renal tubular epithelial cell (RTEC) dysfunction and cell death are among the key pathological features of AKI. Diverse systemic and localized stress conditions such as sepsis, rhabdomyolysis, cardiac surgery, and nephrotoxic drugs can trigger RTEC dysfunction. Through an unbiased RNA inhibition screen, we recently identified cyclin-dependent kinase-like 5 (Cdkl5), also known as serine/threonine kinase-9, as a critical regulator of RTEC dysfunction associated with nephrotoxic and ischemia-associated AKI. In the present study, we examined the role of Cdkl5 in rhabdomyolysis-associated AKI. Using activation-specific antibodies and kinase assays, we found that Cdkl5 is activated in RTECs early during the development of rhabdomyolysis-associated AKI. Furthermore, we found that RTEC-specific Cdkl5 gene ablation mitigates rhabdomyolysis-associated renal impairment. In addition, the small-molecule kinase inhibitor AST-487 alleviated rhabdomyolysis-associated AKI in a Cdkl5-dependent manner. Mechanistically, we demonstrated that Cdkl5 phosphorylates the transcriptional regulator sex-determining region Y box 9 (Sox9) and suppresses its protective function under stress conditions. On the basis of these results, we propose that, by suppressing the protective Sox9-directed transcriptional program, Cdkl5 contributes to rhabdomyolysis-associated renal impairment. All together, the present study identified Cdkl5 as a critical stress-induced kinase that drives RTEC dysfunction and kidney injury linked with distinct etiologies.
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Affiliation(s)
- Ji Young Kim
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Yuntao Bai
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Laura A Jayne
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Rachel E Cianciolo
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio
| | - Amandeep Bajwa
- Transplant Research Institute, James D. Eason Transplant Institute, Department of Surgery, College of Medicine, The University of Tennessee Health Science Center, Memphis, Tennessee
| | - Navjot Singh Pabla
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
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Wyczanska M, Lange-Sperandio B. DAMPs in Unilateral Ureteral Obstruction. Front Immunol 2020; 11:581300. [PMID: 33117389 PMCID: PMC7575708 DOI: 10.3389/fimmu.2020.581300] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 09/21/2020] [Indexed: 12/22/2022] Open
Abstract
Damage-associated molecular patterns (DAMPs) are released from tubular and interstitial cells in the kidney after unilateral ureteral obstruction (UUO). DAMPs are recognized by pattern recognition receptors (PRRs), which mediate the initiation of an immune response and the release of inflammatory cytokines. The animal model of UUO is used for various purposes. UUO in adult mice serves as a model for accelerated renal fibrosis, which is a hallmark of progressive renal disease. UUO in adult mice enables to study cell death, inflammation, and extracellular matrix deposition in the kidney. Neonatal UUO is a model for congenital obstructive nephropathies. It studies inflammation, apoptosis, and interstitial fibrosis in the neonatal kidney, when nephrogenesis is still ongoing. Following UUO, several DAMPs as well as DAMP receptors are upregulated. In adult UUO, soluble uric acid is upregulated and activates the NOD-like receptor family, pyrin domain containing-3 (NLRP3) inflammasome, which promotes fibrosis, apoptosis, and reactive oxygen species (ROS) injury. Further DAMPs associated with UUO are uromodulin, members of the IL-1 family, and necrotic cell DNA, all of which promote sterile inflammation. In neonatal UUO, the receptor for advanced glycation endproducts (RAGE) is highly upregulated. RAGE is a ligand for several DAMPs, including high mobility group box 1 (HMGB1) and S100 proteins, which play an important role in renal fibrosis. Additionally, necroptosis is an important mechanism of cell death, besides apoptosis, in neonatal UUO. It is highly inflammatory due to release of cytokines and specific DAMPs. The release and recognition of DAMPs initiate sterile inflammation, which makes them good candidates to develop and improve diagnostic and therapeutic strategies in renal fibrosis and congenital obstructive nephropathies.
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Affiliation(s)
- Maja Wyczanska
- Department of Pediatrics, Dr. v. Hauner Children's Hospital, University Hospital, Ludwig Maximilian University, Munich, Germany
| | - Bärbel Lange-Sperandio
- Department of Pediatrics, Dr. v. Hauner Children's Hospital, University Hospital, Ludwig Maximilian University, Munich, Germany
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108
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Zhang C, Shang Y, Chen X, Midgley AC, Wang Z, Zhu D, Wu J, Chen P, Wu L, Wang X, Zhang K, Wang H, Kong D, Yang Z, Li Z, Chen X. Supramolecular Nanofibers Containing Arginine-Glycine-Aspartate (RGD) Peptides Boost Therapeutic Efficacy of Extracellular Vesicles in Kidney Repair. ACS NANO 2020; 14:12133-12147. [PMID: 32790341 DOI: 10.1021/acsnano.0c05681] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Extracellular vesicles (EVs) derived from mesenchymal stem cells (MSC-EVs) have been recognized as a promising cell-free therapy for acute kidney injury (AKI), which avoids safety concerns associated with direct cell engraftment. However, low stability and retention of MSC-EVs have limited their therapeutic efficacy. RGD (Arg-Gly-Asp) peptide binds strongly to integrins, which have been identified on the surface of MSC-EV membranes; yet RGD has not been applied to EV scaffolds to enhance and prolong bioavailability. Here, we developed RGD hydrogels, which we hypothesized could augment MSC-EV efficacy in the treatment of AKI models. In vivo tracking of the labeled EVs revealed that RGD hydrogels increased retention and stability of EVs. Integrin gene knockdown experiments confirmed that EV-hydrogel interaction was mediated by RGD-integrin binding. Upon intrarenal injection into mouse AKI models, EV-RGD hydrogels provided superior rescuing effects to renal function, attenuated histopathological damage, decreased tubular injury, and promoted cell proliferation in early phases of AKI. RGD hydrogels also augmented antifibrotic effects of MSC-EVs in chronic stages. Further analysis revealed that the presence of microRNA let-7a-5p in MSC-EVs served as the mechanism contributing to the reduced cell apoptosis and elevated cell autophagy in AKI. In conclusion, RGD hydrogels facilitated MSC-derived let-7a-5p-containing EVs, improving reparative potential against AKI. This study developed an RGD scaffold to increase the EV integrin-mediated loading and in turn improved therapeutic efficacy in renal repair; therefore this strategy shed light on MSC-EV application as a cell-free treatment for potentiated efficiency.
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Affiliation(s)
- Chuyue Zhang
- School of Medicine, Nankai University, Tianjin 300071, China
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Diseases, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Yuna Shang
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Key Laboratory of Bioactive Materials, Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, and National Institute of Functional Materials, Nankai University, Tianjin 300071, China
| | - Xiaoniao Chen
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Diseases, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Adam C Midgley
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Key Laboratory of Bioactive Materials, Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, and National Institute of Functional Materials, Nankai University, Tianjin 300071, China
| | - Zhongyan Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Key Laboratory of Bioactive Materials, Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, and National Institute of Functional Materials, Nankai University, Tianjin 300071, China
| | - Dashuai Zhu
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Jie Wu
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Diseases, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Pu Chen
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Diseases, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Lingling Wu
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Diseases, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Xu Wang
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Diseases, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Kaiyue Zhang
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Hongfeng Wang
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Diseases, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Deling Kong
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Key Laboratory of Bioactive Materials, Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, and National Institute of Functional Materials, Nankai University, Tianjin 300071, China
| | - Zhimou Yang
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Key Laboratory of Bioactive Materials, Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, and National Institute of Functional Materials, Nankai University, Tianjin 300071, China
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Zongjin Li
- School of Medicine, Nankai University, Tianjin 300071, China
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, Henan 453003, China
| | - Xiangmei Chen
- School of Medicine, Nankai University, Tianjin 300071, China
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Chinese PLA Institute of Nephrology, Beijing Key Laboratory of Kidney Diseases, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
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109
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Sheng L, Zhuang S. New Insights Into the Role and Mechanism of Partial Epithelial-Mesenchymal Transition in Kidney Fibrosis. Front Physiol 2020; 11:569322. [PMID: 33041867 PMCID: PMC7522479 DOI: 10.3389/fphys.2020.569322] [Citation(s) in RCA: 130] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 08/26/2020] [Indexed: 12/14/2022] Open
Abstract
Epithelial-mesenchymal transition (EMT) is described as the process in which injured renal tubular epithelial cells undergo a phenotype change, acquiring mesenchymal characteristics and morphing into fibroblasts. Initially, it was widely thought of as a critical mechanism of fibrogenesis underlying chronic kidney disease. However, evidence that renal tubular epithelial cells can cross the basement membrane and become fibroblasts in the renal interstitium is rare, leading to debate about the existence of EMT. Recent research has demonstrated that after injury, renal tubular epithelial cells acquire mesenchymal characteristics and the ability to produce a variety of profibrotic factors and cytokines, but remain attached to the basement membrane. On this basis, a new concept of “partial epithelial-mesenchymal transition (pEMT)” was proposed to explain the contribution of renal epithelial cells to renal fibrogenesis. In this review, we discuss the concept of pEMT and the most recent findings related to this process, including cell cycle arrest, metabolic alternation of epithelial cells, infiltration of immune cells, epigenetic regulation as well as the novel signaling pathways that mediate this disturbed epithelial-mesenchymal communication. A deeper understanding of the role and the mechanism of pEMT may help in developing novel therapies to prevent and halt fibrosis in kidney disease.
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Affiliation(s)
- Lili Sheng
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shougang Zhuang
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Medicine, Rhode Island Hospital and Alpert Medical School, Brown University, Providence, RI, United States
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110
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Tan RZ, Li JC, Liu J, Lei XY, Zhong X, Wang C, Yan Y, Linda Ye L, Darrel Duan D, Lan HY, Wang L. BAY61-3606 protects kidney from acute ischemia/reperfusion injury through inhibiting spleen tyrosine kinase and suppressing inflammatory macrophage response. FASEB J 2020; 34:15029-15046. [PMID: 32964547 DOI: 10.1096/fj.202000261rrr] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 08/27/2020] [Accepted: 08/31/2020] [Indexed: 12/15/2022]
Abstract
Acute kidney injury (AKI) is a highly prevalent clinical syndrome with high mortality and morbidity. Previous studies indicated that inflammation promotes tubular damage and plays a key role in AKI progress. Spleen tyrosine kinase (Syk) has been linked to macrophage-related inflammation in AKI. Up to date, however, no Syk-targeted therapy for AKI has been reported. In this study, we employed both cell model of LPS-induced bone marrow-derived macrophage (BMDM) and mouse model of ischemia/reperfusion injury (IRI)-induced AKI to evaluate the effects of a Syk inhibitor, BAY61-3606 (BAY), on macrophage inflammation in vitro and protection of kidney from AKI in vivo. The expression and secretion of inflammatory cytokines, both in vitro and in vivo, were significantly inhibited even back to normal levels by BAY. The upregulated serum creatinine and blood urea nitrogen levels in the AKI mice were significantly reduced after administration of BAY, implicating a protective effect of BAY on kidneys against IRI. Further analyses from Western blot, immunofluorescence staining and flow cytometry revealed that BAY inhibited the Mincle/Syk/NF-κB signaling circuit and reduced the inflammatory response. BAY also inhibited the reactive oxygen species (ROS), which further decreased the formation of inflammasome and suppressed the mature of IL-1β and IL-18. Notably, these inhibitory effects of BAY on inflammation and inflammasome in BMDM were significantly reversed by Mincle ligand, trehalose-6,6-dibehenate. In summary, these findings provided compelling evidence that BAY may be an efficient inhibitor of the Mincle/Syk/NF-κB signaling circuit and ROS-induced inflammasome, which may help to develop Syk-inhibitors as novel therapeutic agents for AKI.
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Affiliation(s)
- Rui-Zhi Tan
- Research Center of Traditional Chinese Medicine and Western Medicine Integration, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, China
| | - Jian-Chun Li
- Research Center of Traditional Chinese Medicine and Western Medicine Integration, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, China
| | - Jian Liu
- Department of Nephrology, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, China
| | - Xian-Ying Lei
- ICU, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Xia Zhong
- Research Center of Traditional Chinese Medicine and Western Medicine Integration, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, China
| | - Chen Wang
- Research Center of Traditional Chinese Medicine and Western Medicine Integration, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, China
| | - Ying Yan
- Research Center of Traditional Chinese Medicine and Western Medicine Integration, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, China
| | - Lingyu Linda Ye
- Center for Phenomics of Traditional Chinese Medicine, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, China
| | - Dayue Darrel Duan
- Center for Phenomics of Traditional Chinese Medicine, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, China
| | - Hui-Yao Lan
- Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, China
| | - Li Wang
- Research Center of Traditional Chinese Medicine and Western Medicine Integration, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, China
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111
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Sharma N, Gaikwad AB. Effects of renal ischemia injury on brain in diabetic and non-diabetic rats: Role of angiotensin II type 2 receptor and angiotensin-converting enzyme 2. Eur J Pharmacol 2020; 882:173241. [PMID: 32565336 DOI: 10.1016/j.ejphar.2020.173241] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/28/2020] [Accepted: 05/29/2020] [Indexed: 01/19/2023]
Abstract
Clinically, patients with diabetes mellitus (DM) are more susceptible to ischemic renal injury (IRI) than non-diabetic (ND) patients. Besides, IRI predisposes distant organ dysfunctions including, neurological dysfunction, in which the major contributor remains renin-angiotensin system (RAS). Interestingly, the role of depressor arm of RAS on IRI-associated neurological sequalae remains unclear. Hence, this study aimed to delineate the role of angiotensin II type 2 receptor (AT2R) and angiotensin-converting enzyme 2 (ACE2) under the same. ND and Streptozotocin-induced DM rats with bilateral IRI were treated with AT2R agonist-Compound 21 (C21) (0.3 mg/kg/day, i.p.) or ACE2 activator-Diminazene Aceturate (Dize), (5 mg/kg/day, p.o.) either alone or as combination therapy. Effect of IRI on neurological functions were assessed by behavioural, biochemical, and histopathological analysis. Immunohistochemistry, ELISA and qRT-PCR experiments were conducted for evaluation of the molecular mechanisms. We found that in ND and DM rats, IRI causes increased hippocampal MDA and nitrite levels, augmented inflammatory cytokines (granulocyte-colony stimulating factor, glial fibrillary acidic protein), altered protein levels of Ang II, Ang-(1-7) and mRNA expressions of At1r, At2r and Masr. Treatment with C21 and Dize effectively normalised above-mentioned pathological alterations. Moreover, the protective effect of C21 and Dize combination therapy was better than respective monotherapies, and more likely, exerted via augmentation of protein and mRNA levels of depressor arm components. Thus, AT2R agonist and ACE2 activator therapy prevents the development of IRI-associated neurological dysfunction by attenuating oxidative stress and inflammation, upregulating depressor arm of RAS in brain under ND and DM conditions.
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Affiliation(s)
- Nisha Sharma
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan, 333031, India
| | - Anil Bhanudas Gaikwad
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan, 333031, India.
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Kim JY, Bai Y, Jayne LA, Abdulkader F, Gandhi M, Perreau T, Parikh SV, Gardner DS, Davidson AJ, Sander V, Song MA, Bajwa A, Pabla NS. SOX9 promotes stress-responsive transcription of VGF nerve growth factor inducible gene in renal tubular epithelial cells. J Biol Chem 2020; 295:16328-16341. [PMID: 32887795 DOI: 10.1074/jbc.ra120.015110] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 08/28/2020] [Indexed: 01/06/2023] Open
Abstract
Acute kidney injury (AKI) is a common clinical condition associated with diverse etiologies and abrupt loss of renal function. In patients with sepsis, rhabdomyolysis, cancer, and cardiovascular disorders, the underlying disease or associated therapeutic interventions can cause hypoxia, cytotoxicity, and inflammatory insults to renal tubular epithelial cells (RTECs), resulting in the onset of AKI. To uncover stress-responsive disease-modifying genes, here we have carried out renal transcriptome profiling in three distinct murine models of AKI. We find that Vgf nerve growth factor inducible gene up-regulation is a common transcriptional stress response in RTECs to ischemia-, cisplatin-, and rhabdomyolysis-associated renal injury. The Vgf gene encodes a secretory peptide precursor protein that has critical neuroendocrine functions; however, its role in the kidneys remains unknown. Our functional studies show that RTEC-specific Vgf gene ablation exacerbates ischemia-, cisplatin-, and rhabdomyolysis-associated AKI in vivo and cisplatin-induced RTEC cell death in vitro Importantly, aggravation of cisplatin-induced renal injury caused by Vgf gene ablation is partly reversed by TLQP-21, a Vgf-derived peptide. Finally, in vitro and in vivo mechanistic studies showed that injury-induced Vgf up-regulation in RTECs is driven by the transcriptional regulator Sox9. These findings reveal a crucial downstream target of the Sox9-directed transcriptional program and identify Vgf as a stress-responsive protective gene in kidney tubular epithelial cells.
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Affiliation(s)
- Ji Young Kim
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio, USA.
| | - Yuntao Bai
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio, USA
| | - Laura A Jayne
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio, USA
| | - Ferdos Abdulkader
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio, USA
| | - Megha Gandhi
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio, USA
| | - Tayla Perreau
- Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
| | - Samir V Parikh
- Wexner Medical Center, The Ohio State University, Columbus, Ohio, USA
| | - David S Gardner
- School of Veterinary Medicine and Science, University of Nottingham, Loughborough, Leicestershire, United Kingdom
| | - Alan J Davidson
- Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
| | - Veronika Sander
- Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
| | - Min-Ae Song
- Division of Environmental Health Science, College of Public Health and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio, USA
| | - Amandeep Bajwa
- Transplant Research Institute, James D. Eason Transplant Institute, Department of Surgery, College of Medicine, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Navjot Singh Pabla
- Division of Pharmaceutics and Pharmacology, College of Pharmacy and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio, USA.
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113
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Tang C, Livingston MJ, Liu Z, Dong Z. Autophagy in kidney homeostasis and disease. Nat Rev Nephrol 2020; 16:489-508. [PMID: 32704047 PMCID: PMC7868042 DOI: 10.1038/s41581-020-0309-2] [Citation(s) in RCA: 263] [Impact Index Per Article: 65.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2020] [Indexed: 12/13/2022]
Abstract
Autophagy is a conserved lysosomal pathway for the degradation of cytoplasmic components. Basal autophagy in kidney cells is essential for the maintenance of kidney homeostasis, structure and function. Under stress conditions, autophagy is altered as part of the adaptive response of kidney cells, in a process that is tightly regulated by signalling pathways that can modulate the cellular autophagic flux - mammalian target of rapamycin, AMP-activated protein kinase and sirtuins are key regulators of autophagy. Dysregulated autophagy contributes to the pathogenesis of acute kidney injury, to incomplete kidney repair after acute kidney injury and to chronic kidney disease of varied aetiologies, including diabetic kidney disease, focal segmental glomerulosclerosis and polycystic kidney disease. Autophagy also has a role in kidney ageing. However, questions remain about whether autophagy has a protective or a pathological role in kidney fibrosis, and about the precise mechanisms and signalling pathways underlying the autophagy response in different types of kidney cells and across the spectrum of kidney diseases. Further research is needed to gain insights into the regulation of autophagy in the kidneys and to enable the discovery of pathway-specific and kidney-selective therapies for kidney diseases and anti-ageing strategies.
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Affiliation(s)
- Chengyuan Tang
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, Second Xiangya Hospital at Central South University, Changsha, China
| | - Man J Livingston
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Zhiwen Liu
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, Second Xiangya Hospital at Central South University, Changsha, China
| | - Zheng Dong
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, Second Xiangya Hospital at Central South University, Changsha, China.
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA, USA.
- Charlie Norwood VA Medical Center, Augusta, GA, USA.
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Zhang K, Chen S, Sun H, Wang L, Li H, Zhao J, Zhang C, Li N, Guo Z, Han Z, Han ZC, Zheng G, Chen X, Li Z. In vivo two-photon microscopy reveals the contribution of Sox9 + cell to kidney regeneration in a mouse model with extracellular vesicle treatment. J Biol Chem 2020; 295:12203-12213. [PMID: 32641493 PMCID: PMC7443503 DOI: 10.1074/jbc.ra120.012732] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 07/02/2020] [Indexed: 01/05/2023] Open
Abstract
Mesenchymal stem cell (MSC)-derived extracellular vesicles (EVs) have been shown to stimulate regeneration in the treatment of kidney injury. Renal regeneration is also thought to be stimulated by the activation of Sox9+ cells. However, whether and how the activation mechanisms underlying EV treatment and Sox9+ cell-dependent regeneration intersect is unclear. We reasoned that a high-resolution imaging platform in living animals could help to untangle this system. To test this idea, we first applied EVs derived from human placenta-derived MSCs (hP-MSCs) to a Sox9-CreERT2; R26mTmG transgenic mouse model of acute kidney injury (AKI). Then, we developed an abdominal imaging window in the mouse and tracked the Sox9+ cells in the inducible Sox9-Cre transgenic mice via in vivo lineage tracing with two-photon intravital microscopy. Our results demonstrated that EVs can travel to the injured kidneys post intravenous injection as visualized by Gaussia luciferase imaging and markedly increase the activation of Sox9+ cells. Moreover, the two-photon living imaging of lineage-labeled Sox9+ cells showed that the EVs promoted the expansion of Sox9+ cells in kidneys post AKI. Histological staining results confirmed that the descendants of Sox9+ cells contributed to nephric tubule regeneration which significantly ameliorated the renal function after AKI. In summary, intravital lineage tracing with two-photon microscopy through an embedded abdominal imaging window provides a practical strategy to investigate the beneficial functions and to clarify the mechanisms of regenerative therapies in AKI.
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Affiliation(s)
- Kaiyue Zhang
- Nankai University School of Medicine, Tianjin, China; The Key Laboratory of Bioactive Materials, Ministry of Education, the College of Life Sciences, Nankai University, Tianjin, China
| | - Shang Chen
- Nankai University School of Medicine, Tianjin, China; The Key Laboratory of Bioactive Materials, Ministry of Education, the College of Life Sciences, Nankai University, Tianjin, China
| | - Huimin Sun
- Nankai University School of Medicine, Tianjin, China
| | - Lina Wang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Huifang Li
- Nankai University School of Medicine, Tianjin, China
| | - Jinglei Zhao
- Nankai University School of Medicine, Tianjin, China
| | - Chuyue Zhang
- State Key Laboratory of Kidney Diseases, Chinese PLA General Hospital, Beijing, China
| | - Nana Li
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, China
| | - Zhikun Guo
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, China
| | - Zhibo Han
- Jiangxi Engineering Research Center for Stem Cell, Shangrao, Jiangxi, China; Tianjin Key Laboratory of Engineering Technologies for Cell Pharmaceutical, National Engineering Research Center of Cell Products, AmCellGene Co., Ltd., Tianjin, China
| | - Zhong-Chao Han
- Jiangxi Engineering Research Center for Stem Cell, Shangrao, Jiangxi, China; Tianjin Key Laboratory of Engineering Technologies for Cell Pharmaceutical, National Engineering Research Center of Cell Products, AmCellGene Co., Ltd., Tianjin, China; Beijing Engineering Laboratory of Perinatal Stem Cells, Beijing Institute of Health and Stem Cells, Health & Biotech Co., Beijing, China
| | - Guoguang Zheng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Xiangmei Chen
- State Key Laboratory of Kidney Diseases, Chinese PLA General Hospital, Beijing, China
| | - Zongjin Li
- Nankai University School of Medicine, Tianjin, China; The Key Laboratory of Bioactive Materials, Ministry of Education, the College of Life Sciences, Nankai University, Tianjin, China; State Key Laboratory of Kidney Diseases, Chinese PLA General Hospital, Beijing, China; Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, China.
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115
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Transcriptome sequencing of circular RNA reveals a novel circular RNA-has_circ_0114427 in the regulation of inflammation in acute kidney injury. Clin Sci (Lond) 2020; 134:139-154. [PMID: 31930399 DOI: 10.1042/cs20190990] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 01/04/2020] [Accepted: 01/13/2020] [Indexed: 02/07/2023]
Abstract
Acute kidney injury (AKI) is a common serious syndrome characterized by rapid decrease of glomerular filtration rate and the progressive increase of serum creatinine. Circular RNAs (circRNAs) are regulatory RNAs that recently became popular among various diseases. However, the expression profile and function of circRNAs in AKI remain largely unknown. The main function of circRNAs is acting as competing endogenous RNAs (ceRNAs) by binding with microRNAs (miRNAs), as indicated by recent research. In the present study, we established cisplatin-induced AKI model in mice and isolated renal tubular tissues to extract circRNAs for next-generation sequencing (NGS) and bioinformatics analysis. We analyzed the composition, distribution and Gene Ontology terms of circRNAs in cisplatin-induced AKI and revealed differentially expressed circRNAs related to AKI. By finding homologous genes between mouse and human, we identified circRNA- circ-0114427 in humans. We further investigated its function in AKI cell model. Circ-0114427 expression was significantly up-regulated in different AKI cell models. Knockdown of circ-0114427 indicated that circ-0114427 bound to miR-494 as a miRNA sponge to regulate ATF3 expression and further affected the expression of downstream cytokine IL-6. Circ-0114427 regulates inflammatory progression in AKI's early stage via circ-0114427/miR-494/ATF3 pathway. Our findings reveal the expression profile of circRNAs in cisplatin-induced AKI and provide a novel insight into the regulatory mechanism of circRNAs, which may become a new molecular target resource for early diagnosis and treatment strategies.
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Wilflingseder J, Willi M, Lee HK, Olauson H, Jankowski J, Ichimura T, Erben R, Valerius MT, Hennighausen L, Bonventre JV. Enhancer and super-enhancer dynamics in repair after ischemic acute kidney injury. Nat Commun 2020; 11:3383. [PMID: 32636391 PMCID: PMC7341735 DOI: 10.1038/s41467-020-17205-5] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 06/09/2020] [Indexed: 12/21/2022] Open
Abstract
The endogenous repair process can result in recovery after acute kidney injury (AKI) with adaptive proliferation of tubular epithelial cells, but repair can also lead to fibrosis and progressive kidney disease. There is currently limited knowledge about transcriptional regulators regulating these repair programs. Herein we establish the enhancer and super-enhancer landscape after AKI by ChIP-seq in uninjured and repairing kidneys on day two after ischemia reperfusion injury (IRI). We identify key transcription factors including HNF4A, GR, STAT3 and STAT5, which show specific binding at enhancer and super-enhancer sites, revealing enhancer dynamics and transcriptional changes during kidney repair. Loss of bromodomain-containing protein 4 function before IRI leads to impaired recovery after AKI and increased mortality. Our comprehensive analysis of epigenetic changes after kidney injury in vivo has the potential to identify targets for therapeutic intervention. Importantly, our data also call attention to potential caveats involved in use of BET inhibitors in patients at risk for AKI.
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Affiliation(s)
- Julia Wilflingseder
- Brigham and Women's Hospital, Renal Division, Harvard Medical School, 4 Blackfan Circle, Boston, MA, 02115, USA.
- Laboratory of Genetics and Physiology, NIDDK, NIH, 8 Center Dr, Bethesda, MD, 20814, USA.
- Department of Physiology and Pathophysiology, University of Veterinary Medicine, Veterinärplatz 1, 1210, Vienna, Austria.
| | - Michaela Willi
- Laboratory of Genetics and Physiology, NIDDK, NIH, 8 Center Dr, Bethesda, MD, 20814, USA
| | - Hye Kyung Lee
- Laboratory of Genetics and Physiology, NIDDK, NIH, 8 Center Dr, Bethesda, MD, 20814, USA
| | - Hannes Olauson
- Brigham and Women's Hospital, Renal Division, Harvard Medical School, 4 Blackfan Circle, Boston, MA, 02115, USA
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Solnavägen 1, 171 77, Stockholm, Sweden
| | - Jakub Jankowski
- Laboratory of Genetics and Physiology, NIDDK, NIH, 8 Center Dr, Bethesda, MD, 20814, USA
- Department of Physiology and Pathophysiology, University of Veterinary Medicine, Veterinärplatz 1, 1210, Vienna, Austria
| | - Takaharu Ichimura
- Brigham and Women's Hospital, Renal Division, Harvard Medical School, 4 Blackfan Circle, Boston, MA, 02115, USA
| | - Reinhold Erben
- Department of Physiology and Pathophysiology, University of Veterinary Medicine, Veterinärplatz 1, 1210, Vienna, Austria
| | - M Todd Valerius
- Brigham and Women's Hospital, Renal Division, Harvard Medical School, 4 Blackfan Circle, Boston, MA, 02115, USA
| | - Lothar Hennighausen
- Laboratory of Genetics and Physiology, NIDDK, NIH, 8 Center Dr, Bethesda, MD, 20814, USA
| | - Joseph V Bonventre
- Brigham and Women's Hospital, Renal Division, Harvard Medical School, 4 Blackfan Circle, Boston, MA, 02115, USA.
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Shiva N, Sharma N, Kulkarni YA, Mulay SR, Gaikwad AB. Renal ischemia/reperfusion injury: An insight on in vitro and in vivo models. Life Sci 2020; 256:117860. [PMID: 32534037 DOI: 10.1016/j.lfs.2020.117860] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 05/21/2020] [Accepted: 05/26/2020] [Indexed: 02/08/2023]
Abstract
Optimal tissue oxygenation is essential for its normal function. Suboptimal oxygenation or ischemia contributes to increased mortalities during various pathological conditions such as stroke, acute kidney injury (AKI), cardiac failure. Despite the rapid progression of renal tissue injury, the mechanism underlying renal ischemia/reperfusion injury (IRI) remains highly unclear. Experimental in vitro and in vivo models epitomizing the fundamental process is critical to the research of the pathogenesis of IRI and the development of plausible therapeutics. In this review, we describe the in vitro and in vivo models of IRI, ranges from proximal tubular cell lines to surgery-based animal models like clamping of both renal pedicles (bilateral IRI), clamping of one renal pedicle (unilateral IRI), clamping of one/or both renal arteries/or vein, or unilateral IRI with contralateral nephrectomy (uIRIx). Also, advanced technologies like three-dimensional kidney organoids, kidney-on-a-chip are explained. This review provides thoughtful information for establishing reliable and pertinent models for studying IRI-associated acute renal pathologies.
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Affiliation(s)
- Niharika Shiva
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Nisha Sharma
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Yogesh A Kulkarni
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, V.L. Mehta Road, Vile Parle (W), Mumbai 400056, India
| | - Shrikant R Mulay
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Anil Bhanudas Gaikwad
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India.
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Abstract
PURPOSE OF REVIEW The current review will describe the current evidence and mechanisms of acute kidney injury (AKI) as a risk factor for long-term kidney complications, summarize the rationale for AKI follow-up and present an approach to monitoring children with AKI. Despite emerging evidence linking AKI with risk for long-term kidney and cardiovascular outcomes, many children who develop AKI are not followed for kidney disease development after hospital discharge. Better understanding of long-term complications after AKI and practical algorithms for follow-up will hopefully increase the rate and quality of post-AKI monitoring. RECENT FINDINGS Recent evidence shows that pediatric AKI is associated with long-term renal outcomes such as chronic kidney disease (CKD) and hypertension, both known to increase cardiovascular risk. The mechanism of AKI progression to CKD involves maladaptive regeneration of tubular epithelial and endothelial cells, inflammation, fibrosis and glomerulosclerosis. Many AKI survivors are not followed, and no guidelines for pediatric AKI follow-up have been published. SUMMARY Children who had AKI are at increased risk of long-term renal complications but many of them are not monitored for these complications. Recognizing long-term outcomes post-AKI and integration of follow-up programs may have a long-lasting positive impact on patient health.
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119
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Cao J, Wang B, Tang T, Lv L, Ding Z, Li Z, Hu R, Wei Q, Shen A, Fu Y, Liu B. Three-dimensional culture of MSCs produces exosomes with improved yield and enhanced therapeutic efficacy for cisplatin-induced acute kidney injury. Stem Cell Res Ther 2020; 11:206. [PMID: 32460853 PMCID: PMC7251891 DOI: 10.1186/s13287-020-01719-2] [Citation(s) in RCA: 130] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 04/16/2020] [Accepted: 05/08/2020] [Indexed: 02/08/2023] Open
Abstract
Background Exosomes derived from mesenchymal stem cells (MSC-exos) have been demonstrated with great potential in the treatment of multiple human diseases including acute kidney injury (AKI) by virtue of their intrinsic cargoes. However, there are major challenges of low yield and the lack of an established biomanufacturing platform to efficiently produce MSC-exos, thereby limiting their therapeutic application. Here, we aimed to establish a novel strategy to produce MSC-exos with a hollow fiber bioreactor-based three-dimensional (3D) culture system and evaluate the therapeutic efficacy of 3D-exosomes (3D-exos) on AKI. Methods Mesenchymal stem cells (MSCs) were isolated from fresh human umbilical cord and cultured in two-dimensional (2D) flasks. 2 × 108 MSCs were inoculated into the hollow fiber bioreactor for 3D culture. The culture supernatants were collected every 1 or 2 days for isolating exosomes. Exosomes from 2D (2D-exos) and 3D cultures were characterized by transmission electron microscopy, nanoparticle tracking analysis, and western blotting analysis of exosome markers. The yield of exosomes from 2 × 108 MSCs seeded in 2D and 3D culture system was compared, based on protein quantification. The therapeutic efficacy of 2D-exos and 3D-exos was investigated in a murine model of cisplatin-induced AKI in vivo and in vitro. Results 3D culture did not significantly change the surface markers of MSCs, as well as the morphology, size, and exosomal markers of 3D-exos when compared to those of 2D-exos. Compared with conventional 2D culture, the 3D culture system increased total exosome production up to 19.4-fold. 3D-exos were more concentrated in the harvested supernatants (15.5-fold) than 2D-exos, which led to a higher exosome collection efficiency of 3D culture system. In vivo, both 2D-exos and 3D-exos significantly alleviated cisplatin-induced murine AKI evidenced by improved renal function, attenuated pathological changes of renal tubules, reduced inflammatory factors, and repressed T cell and macrophage infiltration. Impressively, 3D-exos were more effective than 2D-exos. Moreover, 3D-exos were taken up by tubular epithelial cells (TECs) with improved efficiency, thereby exhibiting superior anti-inflammatory effect and improved viability of TECs in vitro. Conclusions In summary, our findings demonstrate that the hollow fiber 3D culture system provides an efficient strategy for the continuous production of MSC-exos which has enhanced therapeutic potential for cisplatin-induced AKI.
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Affiliation(s)
- Jingyuan Cao
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Bin Wang
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Taotao Tang
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Linli Lv
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Zhaoying Ding
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Zuolin Li
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Ruoyu Hu
- Department of Cardiothoracic Surgery, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Qing Wei
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Anran Shen
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Yuqi Fu
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China
| | - Bicheng Liu
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, 210009, Jiangsu Province, China.
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Exogenous biological renal support ameliorates renal pathology after ischemia reperfusion injury in elderly mice. Aging (Albany NY) 2020; 11:2031-2044. [PMID: 30978173 PMCID: PMC6503883 DOI: 10.18632/aging.101899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 03/31/2019] [Indexed: 12/28/2022]
Abstract
We established an exogenous biological renal support model through the generation of parabiotic mice. At 72 hours after ischemia reperfusion injury (IRI), the aged mice that received exogenous biological renal support showed significantly higher levels of renal cell proliferation and dedifferentiation, lower levels of renal tubular injury, improved renal function, and a lower mortality than those that did not receive exogenous biological renal support. Using the Quantibody Mouse Cytokine Antibody Array, we found that aged IRI mice that received exogenous biological renal support had an up-regulation of multiple inflammatory related cytokines compared to the group that did not receive exogenous biological renal support. We suggest that the exogenous biological renal support might promote renal tubular epithelial cell proliferation and dedifferentiation and improve the prognosis of aged IRI mice. Exogenous biological renal support may play an important role in the amelioration of renal IRI by regulating the expression of multiple cytokines.
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Role of SET7/9 in the progression of ischemic renal injury in diabetic and non-diabetic rats. Biochem Biophys Res Commun 2020; 528:14-20. [PMID: 32448511 DOI: 10.1016/j.bbrc.2020.05.075] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 05/11/2020] [Indexed: 12/16/2022]
Abstract
SET domain with lysine methyltransferase 7/9 (Set7/9), a histone lysine methyltransferase (HMT), recently suggested to exert a critical role among kidney disorders, whereas its role in diabetes associated IRI co-morbidity remains complete elusive. The present study aimed to understand the role of SET7/9 and histone methylation in regulation of inflammatory signaling under IRI in diabetes mellitus and non-diabetic rats. Our results demonstrated that IRI caused renal dysfunction via increased blood urea nitrogen (BUN) levels in ND and DM rats. The NF-κB mediated inflammatory cascade like increased p-NF-κB, reduced IκBα levels followed by enhanced leukocyte infiltration as shown by increased MCP-1 expressions. IRI results in increased histone H3 methylation at lysine 4 and 36 (H3K4Me2, H3K36Me2), and decreased histone H3 methylation at lysine 9. Additionally, IRI increased the protein and mRNA expression of H3K4Me2 specific histone methyltransferase-SET7/9 in DM and ND rats. The abovementioned results remain prominent in DM rats compared to ND rats followed by IRI. Further, treatment with a novel SET7/9 inhibitor; cyproheptadine, significantly improved renal functioning via reducing the BUN levels in ND and DM rats. Hence, this study demonstrated the role of SET7/9 in mediating active transcription via H3K4Me2, ultimately regulated the NFκB-mediated inflammatory cascade. Therefore, SET7/9 can be explored as novel target for drug development against IRI under DM and ND conditions.
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Wu WF, Wang JN, Li Z, Wei B, Jin J, Gao L, Li HD, Li J, Chen HY, Meng XM. 7-Hydroxycoumarin protects against cisplatin-induced acute kidney injury by inhibiting necroptosis and promoting Sox9-mediated tubular epithelial cell proliferation. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2020; 69:153202. [PMID: 32169782 DOI: 10.1016/j.phymed.2020.153202] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 01/01/2020] [Accepted: 02/29/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND 7-Hydroxycoumarin (7-HC), also known as umbelliferon, is commonly found in Chinese herbs (e.g. Eucommiae Cortex, Prunellae Spica, Radix Angelicae Biseratae). Previous laboratory studies have indicated that 7-HC has anti-inflammatory, anti-oxidative, and anti-tumor effects. Cisplatin is a widely used chemotherapeutic agent for cancer. Nephrotoxicity is one of the limiting side effects of cisplatin use. PURPOSE This study aimed to evaluate the renoprotective effect of 7-HC in a cisplatin-induced acute kidney injury (AKI) mouse model. METHODS AKI was induced in male C57BL/6 mice (aged 6-8 weeks) by a single intraperitoneal injection of cisplatin at 20 mg/kg. The mice received 7-HC at 30, 60, and 90 mg/kg intraperitoneally before or after cisplatin administration. Renal function, necroptosis, and cell proliferation were measured. Mechanisms underlying the reno-protective effect of 7-HC were explored in renal tubular epithelial cells treated with or without cisplatin. RESULTS In-vivo experiments showed that 7-HC significantly improved the loss in kidney function induced by cisplatin, as indicated by lower levels of serum creatinine and blood urea nitrogen, in AKI mice. Consistent herewith, cisplatin-induced tubular damage was alleviated by 7-HC as shown by morphological (periodic acid-Schiff staining) and kidney injury marker (KIM-1) analyses. We found that 7-HC suppressed renal necroptosis via the RIPK1/RIPK3/MLKL pathway and accelerated renal repair as evidenced by the upregulation of cyclin D1 in cisplatin-induced nephropathy. In-vitro experiments showed that knockdown of Sox9 attenuated the suppressive effect of 7-HC on KIM-1 and reversed the stimulatory effect of 7-HC on cyclin D1 expression in cisplatin-treated HK-2 cells, indicating that 7-HC may protect against AKI via a Sox9-dependent mechanism. CONCLUSION 7-HC inhibits cisplatin-induced AKI by suppressing RIPK1/RIPK3/MLKL-mediated necroptosis and promoting Sox9-mediated tubular epithelial cell proliferation. 7-HC may serve as a preventive and therapeutic agent for AKI.
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Affiliation(s)
- Wei-Feng Wu
- The Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, China; School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong and Department of Chinese Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Jia-Nan Wang
- The Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, China
| | - Zeng Li
- The Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, China
| | - Biao Wei
- The Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, China
| | - Juan Jin
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, China
| | - Li Gao
- The Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, China
| | - Hai-Di Li
- The Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, China
| | - Jun Li
- The Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, China
| | - Hai-Yong Chen
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong and Department of Chinese Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China.
| | - Xiao-Ming Meng
- The Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, China.
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Liu L, Deng Y, Cai Y, Lu P, Guo Y, Zhang C, Li Q, Zhang T, Han M, Xu G. Ablation of Gsa impairs renal tubule proliferation after injury via CDK2/cyclin E. Am J Physiol Renal Physiol 2020; 318:F793-F803. [PMID: 32036696 DOI: 10.1152/ajprenal.00367.2019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Acute kidney injury has a high global morbidity associated with an increased risk of death and chronic kidney disease. Renal tubular epithelial cell regeneration following injury may be a decisive factor in renal repair or the progression of acute kidney injury to chronic kidney disease, but the underlying mechanism of abnormal renal tubular repair remains unclear. In the present study, we investigated the role of heterotrimeric G stimulatory protein α-subunit (Gsa) in renal tubular epithelial cell regeneration. We generated renal tubule epithelium-specific Gsa knockout (GsaKspKO) mice to show the essential role of Gsa in renal tubular epithelial cell regeneration in two AKI models: acute aristolochic acid nephropathy (AAN) and unilateral ischemia-reperfusion injury (UIRI). GsaKspKO mice developed more severe renal impairment after AAN and UIRI, higher serum creatinine levels, and more substantial tubular necrosis than wild-type mice. More importantly, Gsa inactivation impaired renal tubular epithelial cell proliferation by reducing bromodeoxyuridine+ cell numbers in the AAN model and inhibiting cyclin-dependent kinase 2/cyclin E1 expression in the UIRI model. This reduced proliferation was further supported in vitro with Gsa-targeting siRNA. Downregulation of Gsa inhibited tubular epithelial cell proliferation in HK-2 and mIMCD-3 cells. Furthermore, Gsa downregulation inhibited cyclin-dependent kinase 2/cyclin E1 expression, which was dependent on the Raf-MEK-ERK signaling pathway. In conclusion, Gsa is required for tubular epithelial cell regeneration during kidney repair after AKI. Loss of Gsa impairs renal tubular epithelial cell regeneration by blocking the Raf-MEK-ERK pathway.
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Affiliation(s)
- Lele Liu
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuanjun Deng
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yang Cai
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pingfan Lu
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yiyan Guo
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chunjiang Zhang
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian Li
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tianjing Zhang
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Min Han
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Gang Xu
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Wen X, Li S, Frank A, Chen X, Emlet D, Hukriede NA, Kellum JA. Time-dependent effects of histone deacetylase inhibition in sepsis-associated acute kidney injury. Intensive Care Med Exp 2020; 8:9. [PMID: 32034542 PMCID: PMC7007462 DOI: 10.1186/s40635-020-0297-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 01/29/2020] [Indexed: 02/10/2023] Open
Abstract
BACKGROUND Sepsis, a dysregulated host response to infection with results in organ dysfunction, has been a major challenge to the development of effective therapeutics. Sepsis-associated acute kidney injury (S-AKI) results in a 3-5-fold increase in the risk of hospital mortality compared to sepsis alone. The development of therapies to reverse S-AKI could therefore significantly affect sepsis outcomes. However, the translation of therapies from preclinical studies into humans requires model systems that recapitulate clinical scenarios and the development of renal fibrosis indicative of the transition from acute to chronic kidney disease. RESULTS Here we characterized a murine model of S-AKI induced by abdominal sepsis developing into a chronic phenotype. We applied a small molecule histone deacetylase-8 inhibitor, UPHD186, and found that early treatment, beginning at 48 h post-sepsis, worsened renal outcome accompanied by decreasing mononuclear cell infiltration in the kidney, skewing cells into a pro-inflammatory phenotype, and increased pro-fibrotic gene expression, while delayed treatment, beginning at 96 h post-sepsis, after the acute inflammation in the kidney had subsided, resulted in improved survival and kidney histology presumably through promoting proliferation and inhibiting fibrosis. CONCLUSIONS These findings not only present a clinically relevant S-AKI model, but also introduce a timing dimension into S-AKI therapeutic interventions that delayed treatment with UPHD186 may enhance renal histologic repair. Our results provide novel insights into successful repair of kidney injury and sepsis therapy.
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Affiliation(s)
- Xiaoyan Wen
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Ave, Suite 220, Pittsburgh, PA, 15213, USA
| | - Shengnan Li
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Ave, Suite 220, Pittsburgh, PA, 15213, USA
| | - Alicia Frank
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Ave, Suite 220, Pittsburgh, PA, 15213, USA
| | - Xiukai Chen
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Ave, Suite 220, Pittsburgh, PA, 15213, USA
| | - David Emlet
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Ave, Suite 220, Pittsburgh, PA, 15213, USA
| | - Neil A Hukriede
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Ave, Suite 220, Pittsburgh, PA, 15213, USA
- Department of Developmental Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - John A Kellum
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Ave, Suite 220, Pittsburgh, PA, 15213, USA.
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125
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Shen Y, Jiang L, Wen P, Ye Y, Zhang Y, Ding H, Luo J, Xu L, Zen K, Zhou Y, Yang J. Tubule-derived lactate is required for fibroblast activation in acute kidney injury. Am J Physiol Renal Physiol 2020; 318:F689-F701. [PMID: 31928224 DOI: 10.1152/ajprenal.00229.2019] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Acute kidney injury (AKI) is a highly prevalent medical syndrome associated with high mortality and morbidity. Several types of cells, including epithelial cells, vascular endothelial cells, pericytes, and macrophages, participate in the development of AKI. Recently, renal fibroblasts were found to play an important role in the regulation of tubular injury, repair, and recovery after AKI. However, the mechanisms underlying fibroblast activation and proliferation during the progression of AKI remain unclear. In the present study, we found many activated myofibroblasts located in the renal interstitium with an abundance of extracellular matrix deposition following folic acid-induced AKI. The proliferative pattern of tubular epithelial cells and interstitial cells following acute injury was different, indicating that the proliferation of fibroblasts followed the proliferation of tubular epithelial cells. Furthermore, we observed that proliferative tubular epithelial cells preferred aerobic glycolysis as the dominating metabolic pathway in the progression of AKI. Lactate generated from injured tubules was taken up by interstitial fibroblasts in the later stages of AKI, which induced fibroblast activation and proliferation in vitro. Early inhibition of lactate production in tubules by glycolytic inhibitors suppressed fibroblast activation after folic acid-induced injury. Collectively, these results support the important role of fibroblasts in the development of AKI and suggest that lactate produced by glycolysis in tubular epithelial cells is a novel regulator of fibroblast activation and proliferation.
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Affiliation(s)
- Yan Shen
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China.,Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Lei Jiang
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ping Wen
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yinyin Ye
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China.,Department of Nephrology, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui, China
| | - Yu Zhang
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Hao Ding
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jing Luo
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Lingling Xu
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ke Zen
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University Advanced Institute of Life Sciences, Nanjing, Jiangsu, China
| | - Yang Zhou
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Junwei Yang
- Center for Kidney Disease, 2nd Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
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Deng B, Lin Y, Chen Y, Ma S, Cai Q, Wang W, Li B, Liu T, Zhou P, He R, Ding F. Plasmacytoid dendritic cells promote acute kidney injury by producing interferon-α. Cell Mol Immunol 2020; 18:219-229. [PMID: 31900458 DOI: 10.1038/s41423-019-0343-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 12/01/2019] [Indexed: 02/06/2023] Open
Abstract
Acute kidney injury (AKI) is a common clinical complication associated with high mortality in patients. Immune cells and cytokines have recently been described to play essential roles in AKI pathogenesis. Plasmacytoid dendritic cells (pDCs) are a unique DC subset that specializes in type I interferon (IFN) production. Here, we showed that pDCs rapidly infiltrated the kidney in response to AKI and contributed to kidney damage by producing IFN-α. Deletion of pDCs using DTRBDCA2 transgenic (Tg) mice suppressed cisplatin-induced AKI, accompanied by marked reductions in proinflammatory cytokine production, immune cell infiltration and apoptosis in the kidney. In contrast, adoptive transfer of pDCs during AKI exacerbated kidney damage. We further identified IFN-α as the key factor that mediated the functions of pDCs during AKI, as IFN-α neutralization significantly attenuated kidney injury. Furthermore, IFN-α produced by pDCs directly induced the apoptosis of renal tubular epithelial cells (TECs) in vitro. In addition, our data demonstrated that apoptotic TECs induced the activation of pDCs, which was inhibited in the presence of an apoptosis inhibitor. Furthermore, similar deleterious effects of pDCs were observed in an ischemia reperfusion (IR)-induced AKI model. Clinically, increased expression of IFN-α in kidney biopsies was observed in kidney transplants with AKI. Taken together, the results of our study reveal that pDCs play a detrimental role in AKI via IFN-α.
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Affiliation(s)
- Bo Deng
- Division of Nephrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, 200011, Shanghai, China
| | - Yuli Lin
- Department of Immunology and Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, School of Basic Medical Sciences, Fudan University, 200032, Shanghai, China.,Institutes of Integrative Medicine, Fudan University, 200032, Shanghai, China
| | - Yusheng Chen
- Department of Gastrointestinal Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 200120, Shanghai, China
| | - Shuai Ma
- Division of Nephrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, 200011, Shanghai, China
| | - Qian Cai
- Department of Immunology and Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, School of Basic Medical Sciences, Fudan University, 200032, Shanghai, China
| | - Wenji Wang
- Division of Nephrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, 200011, Shanghai, China
| | - Bingji Li
- Department of Immunology and Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, School of Basic Medical Sciences, Fudan University, 200032, Shanghai, China
| | - Tingyan Liu
- Division of Nephrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, 200011, Shanghai, China
| | - Peihui Zhou
- Division of Nephrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, 200011, Shanghai, China
| | - Rui He
- Department of Immunology and Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, School of Basic Medical Sciences, Fudan University, 200032, Shanghai, China.
| | - Feng Ding
- Division of Nephrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, 200011, Shanghai, China.
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Abstract
Decades of pre-clinical research have revealed biologic pathways that have suggested potential therapies for acute kidney injury (AKI) in experimental models. However, translating these to human AKI has largely yielded disappointing results. Fortunately, recent discoveries in AKI molecular mechanisms are providing new opportunities for early detection and novel interventions. This review identifies technologies that are revealing the exceptionally complex nature of the normal kidney, the remarkable heterogeneity of the AKI syndrome, and the myriad responses of the kidney to AKI. Based on the current state of the art, novel approaches to improve the bench-to-bedside translation of novel discoveries are proposed. These strategies include the use of unbiased approaches to improve our understanding of human AKI, establishment of irrefutable biologic plausibility for proposed biomarkers and therapies, identification of patients at risk for AKI pre-injury using clinical scores and non-invasive biomarkers, initiation of safe, and effective preventive interventions of pre-injury in susceptible patients, identification of patients who may develop AKI post-injury using electronic triggers, clinical scores, and novel biomarkers, employment of sequential biomarkers to initiate appropriate therapies based on knowledge of the underlying pathophysiology, use of new biomarkers as criteria for enrollment in randomized clinical trials, assessing efficacy, and empowering the drug development process, and early initiation of anti-fibrotic therapies. These strategies are immediately actionable and hold tremendous promise for effective bench-to-bedside translation of novel discoveries that will change the current dismal prognosis of human AKI.
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Affiliation(s)
- Prasad Devarajan
- Department of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, United States
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128
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Zeng X, Chen X, Qin H, Han Y, Chen X, Han Z, Zhao W. Preventive effects of a natural anti-inflammatory agent Salvianolic acid A on acute kidney injury in mice. Food Chem Toxicol 2020; 135:110901. [DOI: 10.1016/j.fct.2019.110901] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 10/12/2019] [Accepted: 10/18/2019] [Indexed: 12/24/2022]
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Júnior FAN, Jorge ARC, Marinho AD, Silveira JADM, Alves NTQ, Costa PHS, E Silva PLB, Chaves-Filho AJM, Lima DB, Sampaio TL, Morais GBD, Evangelista JSAM, Martins AMC, Júnior RSF, Macedo DS, Jorge RJB, Monteiro HSA. Bothrops alternatus Snake Venom Induces Cytokine Expression and Oxidative Stress on Renal Function. Curr Top Med Chem 2019; 19:2058-2068. [PMID: 31400266 DOI: 10.2174/1568026619666190809100319] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/21/2019] [Accepted: 06/05/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Envenomation caused by Bothrops alternatus is common in Southern Brazil. Acute Kidney Injury occurs after Bothrops snakebite and more information is necessaryrequired to understand its mechanism. OBJECTIVE The objective was to evaluate the effect of Bothrops alternatus venom (BaV) on renal cells and rat isolated kidney function. METHODS Wistar rats (n = 6, weighing 260-320 g) were perfused with a Krebs-Henseleit solution containing 6 g 100 mL-1 of bovine serum albumin. After 30 minutes, the kidneys were perfused with BaV to a final concentration of 1 and 3 μgmL-1; and subsequently were evaluated for Perfusion Pressure (PP), Renal Vascular Resistance (RVR), Urinary Flow (UF), Glomerular Filtration Rate (GFR), and percentage of electrolyte tubular transport. Renal histological analysis, cytokine release, oxidative stress and cytotoxicity in renal proximal tubular cells were assessed. RESULTS BaV reduced PP, RVR, GFR, UF, total and proximal sodium transport (%TNa+), and chloride (%TCl-) in the isolated kidney perfusion model. Histological analysis of perfused kidneys disclosed the presence of proteinaceous material in the glomeruli and renal tubules, vacuolar tubular epithelial cell degeneration, Bowman's capsule degeneration, swelling of glomerular epithelial cells, glomerular atrophy and degeneration, and the presence of intratubular protein. Cytokine release (TNF-α, IL-1β, IL-10) and oxidative stress were increased in the kidneys. The viability of LLC-MK2 cells (IC50: 221.3 μg/mL) was decreased by BaV and necrosis was involved in cell death. CONCLUSION These findings indicate that BaV modifies functional parameters in an isolated perfused kidney model and has cytotoxic effects on renal lineage cells.
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Affiliation(s)
- F A Nogueira Júnior
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - A R Coelho Jorge
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - A D Marinho
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - J A de Moraes Silveira
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - N T Queiroz Alves
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - P H Sá Costa
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - P L Braga E Silva
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - A J Maia Chaves-Filho
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - D B Lima
- Department of Clinical and Toxicological Analyses, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - T L Sampaio
- Department of Clinical and Toxicological Analyses, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - G B de Morais
- Faculdade de Medicina Veterinária. Universidade Estadual do Ceará, Fortaleza, Ceará, Brazil
| | | | - A M Costa Martins
- Department of Clinical and Toxicological Analyses, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - R S Ferreira Júnior
- Centro de Estudos de Venenos e Animais Peçonhentos - CEVAP, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
| | - D S Macedo
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - R J Bezerra Jorge
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
| | - H S Azul Monteiro
- Department of Physiology and Pharmacology, Faculdade de Medicina, Universidade Federal do Ceará, 60430-270, Fortaleza, Ceará, Brazil
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Gasparitsch M, Schieber A, Schaubeck T, Keller U, Cattaruzza M, Lange-Sperandio B. Tyrphostin AG490 reduces inflammation and fibrosis in neonatal obstructive nephropathy. PLoS One 2019; 14:e0226675. [PMID: 31846485 PMCID: PMC6917291 DOI: 10.1371/journal.pone.0226675] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 12/03/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Congenital obstructive nephropathy is the main cause of end-stage renal disease in infants and children. Renal insufficiency is due to impaired growth and maturation in the developing kidney with obstruction. Congenital obstructive nephropathy leads to cytokine mediated inflammation and the development of interstitial fibrosis. The Janus kinase-2 (JAK-2) and Signal Transducer and Activator of Transcription'-3 (STAT3) are involved in cytokine production, inflammation, and interstitial fibrosis. METHODS We studied the role of JAK2/STAT3 in a model of congenital obstructive nephropathy using unilateral ureteral obstruction (UUO) in neonatal mice at the second day of life. Cytokine production, inflammation, and interstitial fibrosis were analyzed in obstructed and sham operated kidneys of neonatal mice treated with or without JAK2/STAT3 inhibitor Tyrphostin AG490. To mimic obstruction and distension, proximal tubular cells were stretched in vitro. RESULTS We show that STAT3 is highly activated in the developing kidney with obstruction and in proximal tubular cells following stretch. JAK2/STAT3 activation mediates cytokine release and leukocyte recruitment into neonatal kidneys after UUO. Pharmacological blockade of JAK2/STAT3 by Tyrphostin AG490 reduced inflammation, tubular apoptosis, and interstitial fibrosis. JAK2/STAT3 blockade decreased pro-inflammatory and profibrotic mediators in tubular cells. CONCLUSION Our findings provide evidence that JAK2/STAT3 mediates inflammation and fibrosis in the developing kidney with obstruction. Blocking JAK2/STAT3 may prove beneficial in congenital obstructive nephropathy in children.
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Affiliation(s)
- Mojca Gasparitsch
- Dr. v. Hauner Children’s Hospital, Division of Pediatric Nephrology, Ludwig-Maximilians-University, Munich, Germany
| | - Alexandra Schieber
- Dr. v. Hauner Children’s Hospital, Division of Pediatric Nephrology, Ludwig-Maximilians-University, Munich, Germany
| | - Teresa Schaubeck
- Dr. v. Hauner Children’s Hospital, Division of Pediatric Nephrology, Ludwig-Maximilians-University, Munich, Germany
| | - Ursula Keller
- Dr. v. Hauner Children’s Hospital, Division of Pediatric Nephrology, Ludwig-Maximilians-University, Munich, Germany
| | - Marco Cattaruzza
- Department of Physiology, Ruprecht-Karls-University, Heidelberg, Germany
| | - Bärbel Lange-Sperandio
- Dr. v. Hauner Children’s Hospital, Division of Pediatric Nephrology, Ludwig-Maximilians-University, Munich, Germany
- * E-mail:
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Huang E, Vo A, Choi J, Ammerman N, Lim K, Sethi S, Kim I, Kumar S, Najjar R, Peng A, Jordan SC. Three-Year Outcomes of a Randomized, Double-Blind, Placebo-Controlled Study Assessing Safety and Efficacy of C1 Esterase Inhibitor for Prevention of Delayed Graft Function in Deceased Donor Kidney Transplant Recipients. Clin J Am Soc Nephrol 2019; 15:109-116. [PMID: 31843975 PMCID: PMC6946080 DOI: 10.2215/cjn.04840419] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 10/23/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND OBJECTIVES Delayed graft function is related to ischemia-reperfusion injury and may be complement dependent. We previously reported from a randomized, placebo-controlled trial that treatment with C1 esterase inhibitor was associated with a shorter duration of delayed graft function and higher eGFR at 1 year. Here, we report longer-term outcomes from this trial. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS This is a post hoc analysis of a phase 1/2, randomized, controlled trial enrolling 70 recipients of deceased donor kidney transplants at risk for delayed graft function (NCT02134314). Subjects were randomized to receive C1 esterase inhibitor 50 U/kg (n=35) or placebo (n=35) intraoperatively and at 24 hours. The cumulative incidence functions method was used to compare graft failure and death over 3.5 years. eGFR slopes were compared using a linear mixed effects model. RESULTS Three deaths occurred among C1 esterase inhibitor-treated patients compared with none receiving placebo. Seven graft failures developed in the placebo group compared with one among C1 esterase inhibitor-treated recipients; the cumulative incidence of graft failure was lower over 3.5 years among C1 esterase inhibitor-treated recipients compared with placebo (P=0.03). Although no difference in eGFR slopes was observed between groups (P for group-time interaction =0.12), eGFR declined in placebo-treated recipients (-4 ml/min per 1.73 m2 per year; 95% confidence interval, -8 to -0.1) but was stable in C1 esterase inhibitor-treated patients (eGFR slope: 0.5 ml/min per 1.73 m2 per year; 95% confidence interval, -4 to 5). At 3.5 years, eGFR was 56 ml/min per 1.73 m2 (95% confidence interval, 42 to 70) in the C1 esterase inhibitor group versus 35 ml/min per 1.73 m2 (95% confidence interval, 21 to 48) in the placebo group, with an estimated mean eGFR difference of 21 ml/min per 1.73 m2 (95% confidence interval, 2 to 41 ml/min per 1.73 m2). CONCLUSIONS Treatment of patients at risk for ischemia-reperfusion injury and delayed graft function with C1 esterase inhibitor was associated with a lower incidence of graft failure.
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Affiliation(s)
- Edmund Huang
- Division of Nephrology, Department of Medicine and
| | - Ashley Vo
- Division of Nephrology, Department of Medicine and
| | - Jua Choi
- Division of Nephrology, Department of Medicine and
| | | | - Kathlyn Lim
- Division of Nephrology, Department of Medicine and
| | | | - Irene Kim
- Department of Surgery, Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, California
| | | | - Reiad Najjar
- Division of Nephrology, Department of Medicine and
| | - Alice Peng
- Division of Nephrology, Department of Medicine and
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Platt JL, Cascalho M, Piedrahita JA. Xenotransplantation: Progress Along Paths Uncertain from Models to Application. ILAR J 2019; 59:286-308. [PMID: 30541147 DOI: 10.1093/ilar/ily015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 08/23/2018] [Indexed: 12/18/2022] Open
Abstract
For more than a century, transplantation of tissues and organs from animals into man, xenotransplantation, has been viewed as a potential way to treat disease. Ironically, interest in xenotransplantation was fueled especially by successful application of allotransplantation, that is, transplantation of human tissue and organs, as a treatment for a variety of diseases, especially organ failure because scarcity of human tissues limited allotransplantation to a fraction of those who could benefit. In principle, use of animals such as pigs as a source of transplants would allow transplantation to exert a vastly greater impact than allotransplantation on medicine and public health. However, biological barriers to xenotransplantation, including immunity of the recipient, incompatibility of biological systems, and transmission of novel infectious agents, are believed to exceed the barriers to allotransplantation and presently to hinder clinical applications. One way potentially to address the barriers to xenotransplantation is by genetic engineering animal sources. The last 2 decades have brought progressive advances in approaches that can be applied to genetic modification of large animals. Application of these approaches to genetic engineering of pigs has contributed to dramatic improvement in the outcome of experimental xenografts in nonhuman primates and have encouraged the development of a new type of xenograft, a reverse xenograft, in which human stem cells are introduced into pigs under conditions that support differentiation and expansion into functional tissues and potentially organs. These advances make it appropriate to consider the potential limitation of genetic engineering and of current models for advancing the clinical applications of xenotransplantation and reverse xenotransplantation.
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Affiliation(s)
- Jeffrey L Platt
- Surgery, Microbiology & Immunology, and Transplantation Biology, University of Michigan, Ann Arbor, Michigan
| | - Marilia Cascalho
- Surgery, Microbiology & Immunology, and Transplantation Biology, University of Michigan, Ann Arbor, Michigan
| | - Jorge A Piedrahita
- Translational Medicine and The Comparative Medicine Institute, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
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Yin W, Kumar T, Lai Z, Zeng X, Kanaan HD, Li W, Zhang PL. Kidney injury molecule-1, a sensitive and specific marker for identifying acute proximal tubular injury, can be used to predict renal functional recovery in native renal biopsies. Int Urol Nephrol 2019; 51:2255-2265. [DOI: 10.1007/s11255-019-02311-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 10/03/2019] [Indexed: 12/28/2022]
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Molecular Mechanisms of the Acute Kidney Injury to Chronic Kidney Disease Transition: An Updated View. Int J Mol Sci 2019; 20:ijms20194941. [PMID: 31590461 PMCID: PMC6801733 DOI: 10.3390/ijms20194941] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 10/03/2019] [Accepted: 10/04/2019] [Indexed: 02/08/2023] Open
Abstract
Increasing evidence has demonstrated the bidirectional link between acute kidney injury (AKI) and chronic kidney disease (CKD) such that, in the clinical setting, the new concept of a unified syndrome has been proposed. The pathophysiological reasons, along with the cellular and molecular mechanisms, behind the ability of a single, acute, apparently self-limiting event to drive chronic kidney disease progression are yet to be explained. This acute injury could promote progression to chronic disease through different pathways involving the endothelium, the inflammatory response and the development of fibrosis. The interplay among endothelial cells, macrophages and other immune cells, pericytes and fibroblasts often converge in the tubular epithelial cells that play a central role. Recent evidence has strengthened this concept by demonstrating that injured tubules respond to acute tubular necrosis through two main mechanisms: The polyploidization of tubular cells and the proliferation of a small population of self-renewing renal progenitors. This alternative pathophysiological interpretation could better characterize functional recovery after AKI.
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Higgins CE, Tang J, Mian BM, Higgins SP, Gifford CC, Conti DJ, Meldrum KK, Samarakoon R, Higgins PJ. TGF-β1-p53 cooperativity regulates a profibrotic genomic program in the kidney: molecular mechanisms and clinical implications. FASEB J 2019; 33:10596-10606. [PMID: 31284746 PMCID: PMC6766640 DOI: 10.1096/fj.201900943r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/10/2019] [Indexed: 12/11/2022]
Abstract
Chronic kidney disease affects >15% of the U.S. population and >850 million individuals worldwide. Fibrosis is the common outcome of many chronic renal disorders and, although the etiology varies (i.e., diabetes, hypertension, ischemia, acute injury, and urologic obstructive disorders), persistently elevated renal TGF-β1 levels result in the relentless progression of fibrotic disease. TGF-β1 orchestrates the multifaceted program of renal fibrogenesis involving proximal tubular dysfunction, failed epithelial recovery and redifferentiation, and subsequent tubulointerstitial fibrosis, eventually leading to chronic renal disease. Recent findings implicate p53 as a cofactor in the TGF-β1-induced signaling pathway and a transcriptional coregulator of several TGF-β1 profibrotic response genes by complexing with receptor-activated SMADs, which are homologous to the small worms (SMA) and Drosophilia mothers against decapentaplegic (MAD) gene families. The cooperative p53-TGF-β1 genomic cluster includes genes involved in cell growth control and extracellular matrix remodeling [e.g., plasminogen activator inhibitor-1 (PAI-1; serine protease inhibitor, clade E, member 1), connective tissue growth factor, and collagen I]. Although the molecular basis for this codependency is unclear, many TGF-β1-responsive genes possess p53 binding motifs. p53 up-regulation and increased p53 phosphorylation; moreover, they are evident in nephrotoxin- and ischemia/reperfusion-induced injury, diabetic nephropathy, ureteral obstructive disease, and kidney allograft rejection. Pharmacologic and genetic approaches that target p53 attenuate expression of the involved genes and mitigate the fibrotic response, confirming a key role for p53 in renal disorders. This review focuses on mechanisms whereby p53 functions as a transcriptional regulator within the TGF-β1 cluster with an emphasis on the potent fibrosis-promoting PAI-1 gene.-Higgins, C. E., Tang, J., Mian, B. M., Higgins, S. P., Gifford, C. C., Conti, D. J., Meldrum, K. K., Samarakoon, R., Higgins, P. J. TGF-β1-p53 cooperativity regulates a profibrotic genomic program in the kidney: molecular mechanisms and clinical implications.
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Affiliation(s)
- Craig E. Higgins
- Department of Regenerative and Cancer Cell Biology, Albany Medical College, Albany, New York, USA
| | - Jiaqi Tang
- Department of Regenerative and Cancer Cell Biology, Albany Medical College, Albany, New York, USA
| | - Badar M. Mian
- The Urological Institute of Northeastern New York, Albany, New York, USA
- Division of Urology, Department of Surgery, Albany Medical College, Albany, New York, USA
| | - Stephen P. Higgins
- Department of Regenerative and Cancer Cell Biology, Albany Medical College, Albany, New York, USA
| | - Cody C. Gifford
- Department of Regenerative and Cancer Cell Biology, Albany Medical College, Albany, New York, USA
| | - David J. Conti
- Division of Transplantation Surgery, Department of Surgery, Albany Medical College, Albany, New York, USA
| | - Kirstan K. Meldrum
- Division of Pediatric Urology, Central Michigan University, Mount Pleasant, Michigan, USA
| | - Rohan Samarakoon
- Department of Regenerative and Cancer Cell Biology, Albany Medical College, Albany, New York, USA
| | - Paul J. Higgins
- Department of Regenerative and Cancer Cell Biology, Albany Medical College, Albany, New York, USA
- The Urological Institute of Northeastern New York, Albany, New York, USA
- Division of Urology, Department of Surgery, Albany Medical College, Albany, New York, USA
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136
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Zilberman-Itskovich S, Abu-Hamad R, Zarura R, Sova M, Hachmo Y, Stark M, Neuman S, Slavin S, Efrati S. Human mesenchymal stromal cells ameliorate complement induced inflammatory cascade and improve renal functions in a rat model of ischemia-reperfusion induced acute kidney injury. PLoS One 2019; 14:e0222354. [PMID: 31513644 PMCID: PMC6741994 DOI: 10.1371/journal.pone.0222354] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 08/27/2019] [Indexed: 01/24/2023] Open
Abstract
Introduction The primary rational for using mesenchymal stromal cells (MSCs) to rejuvenate damaged tissue is mostly based on their capacity to trans-differentiate and repair injured organs. However, previous studies have demonstrated that MSCs are beneficial even at very early stages, before differentiation and proliferation can be expected. The aim of the current study was to investigate the multifaceted immunological effects of systemically administrating MSCs in the setting of acute kidney injury (AKI) induced by ischemic-reperfusion (I/R). Methods A rat model of I/R induced AKI was used. The rats underwent a unilateral nephrectomy with simultaneously clamping the contralateral kidney for 60 minutes. Four treatment groups received intravenously, increasing doses of human MSCs and after 48 hours, the rats were sacrificed. Blood was taken to evaluate renal functions and to measure systemic inflammatory markers. Kidneys were taken for histopathologic examinations and evaluations of intra-renal complement activation and inflammatory mediators. Results Renal functions improved in U shaped dose dependent manner. Mean serum creatinine levels were 4.5, 2.9, 2.6, 1.7 and 4.1 mg/dL in I/R + placebo, I/R + 150x103 cells, I/R + 250x103 cells, I/R + 500x103 cells and I/R + 1,000x103 cells respectfully (p-values<0.05). Urea demonstrated consistent results with the same U shape improvement manner. The extensive activation of the complement system was ameliorated in the MSCs treatment groups. In addition, MSCs significantly decreased intra-renal levels of IL-1β and TNF-α. It should be noted that the highest doses of MSCs induced renal hypoxia, marked by the Hypoxy-probe staining. Conclusions The early beneficial effect of MSCs in the setting of AKI may be attributed to their immunomodulatory effects. Safe treatment with MSCs can block the deleterious activation of the complement cascade and alleviate the hazardous inflammatory mediator-related cascade.
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Affiliation(s)
- Shani Zilberman-Itskovich
- Nephrology Division, Assaf-Harofeh Medical Center, Zerifin, Israel
- Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- * E-mail:
| | - Ramzia Abu-Hamad
- Nephrology Division, Assaf-Harofeh Medical Center, Zerifin, Israel
| | - Rina Zarura
- Nephrology Division, Assaf-Harofeh Medical Center, Zerifin, Israel
| | - Marina Sova
- Nephrology Division, Assaf-Harofeh Medical Center, Zerifin, Israel
| | - Yafit Hachmo
- Nephrology Division, Assaf-Harofeh Medical Center, Zerifin, Israel
| | - Moshe Stark
- Nephrology Division, Assaf-Harofeh Medical Center, Zerifin, Israel
| | - Sara Neuman
- Biotherapy International, The Center for Innovative Cancer Immunotherapy & Regenerative Medicine, Weizmann Center, Tel Aviv, Israel
| | - Shimon Slavin
- Biotherapy International, The Center for Innovative Cancer Immunotherapy & Regenerative Medicine, Weizmann Center, Tel Aviv, Israel
| | - Shai Efrati
- Nephrology Division, Assaf-Harofeh Medical Center, Zerifin, Israel
- Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
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137
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Miyabe Y, Sekiya S, Sugiura N, Oka M, Karasawa K, Moriyama T, Nitta K, Shimizu T. Renal subcapsular transplantation of hepatocyte growth factor-producing mesothelial cell sheets improves ischemia-reperfusion injury. Am J Physiol Renal Physiol 2019; 317:F229-F239. [DOI: 10.1152/ajprenal.00601.2018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Ischemia-reperfusion injury (IRI) is a clinically important cause of acute kidney injury leading to chronic kidney disease. Furthermore, IRI in renal transplantation still remains a risk factor for delayed graft function. Previous studies on IRI have had some limitations, and few of the studied therapies have been clinically applicable. Therefore, a new method for treating renal IRI is needed. We examined the effects of human mesothelial cell (MC) sheets and hepatocyte growth factor (HGF)-transgenic MC (tg MC) sheets transplanted under the renal capsule in an IRI rat model and compared these two treatments with the intravenous administration of HGF protein and no treatment through serum, histological, and mRNA analyses over 28 days. MC sheets and HGF-tg MC sheets produced HGF protein and significantly improved acute renal dysfunction, acute tubular necrosis, and survival rate. The improvement in necrosis was likely due to the cell sheets promoting the migration and proliferation of renal tubular cells, as observed in vitro. Expression of α-smooth muscle actin at day 14 and renal fibrosis at day 28 after IRI were significantly suppressed in MC sheet and HGF-tg MC sheet treatment groups compared with the other groups, and these effects tended to be reinforced by the HGF-tg MC sheets. These results suggest that the cell sheets locally and continuously affect renal paracrine factors, such as HGF, and support recovery from acute tubular necrosis and improvement of renal fibrosis in chronic disease.
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Affiliation(s)
- Yoei Miyabe
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, Tokyo, Japan
- Department of Medicine, Kidney Center, Tokyo Women’s Medical University, Tokyo, Japan
| | - Sachiko Sekiya
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, Tokyo, Japan
| | - Naoko Sugiura
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, Tokyo, Japan
- Department of Medicine, Kidney Center, Tokyo Women’s Medical University, Tokyo, Japan
| | - Masatoshi Oka
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, Tokyo, Japan
- Department of Medicine, Kidney Center, Tokyo Women’s Medical University, Tokyo, Japan
| | - Kazunori Karasawa
- Department of Medicine, Kidney Center, Tokyo Women’s Medical University, Tokyo, Japan
| | - Takahito Moriyama
- Department of Medicine, Kidney Center, Tokyo Women’s Medical University, Tokyo, Japan
| | - Kosaku Nitta
- Department of Medicine, Kidney Center, Tokyo Women’s Medical University, Tokyo, Japan
| | - Tatsuya Shimizu
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, Tokyo, Japan
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138
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Gonsalez SR, Cortês AL, Silva RCD, Lowe J, Prieto MC, Silva Lara LD. Acute kidney injury overview: From basic findings to new prevention and therapy strategies. Pharmacol Ther 2019; 200:1-12. [PMID: 30959059 PMCID: PMC10134404 DOI: 10.1016/j.pharmthera.2019.04.001] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/27/2019] [Indexed: 01/24/2023]
Abstract
Acute kidney injury (AKI) is defined as a decrease in kidney function within hours, which encompasses both injury and impairment of renal function. AKI is not considered a pathological condition of single organ failure, but a syndrome in which the kidney plays an active role in the progression of multi-organ dysfunction. The incidence rate of AKI is increasing and becoming a common (8-16% of hospital admissions) and serious disease (four-fold increased hospital mortality) affecting public health costs worldwide. AKI also affects the young and previously healthy individuals affected by infectious diseases in Latin America. Because of the multifactorial pathophysiological mechanisms, there is no effective pharmacological therapy that prevents the evolution or reverses the injury once established; therefore, renal replacement therapy is the only current alternative available for renal patients. The awareness of an accurate and prompt recognition of AKI underlying the various clinical phenotypes is an urgent need for more effective therapeutic interventions to diminish mortality and socio-economic impacts of AKI. The use of biomarkers as an indicator of the initial stage of the disease is critical and the cornerstone to fulfill the gaps in the field. This review discusses emerging strategies from basic science toward the anticipation of features, treatment of AKI, and new treatments using pharmacological and stem cell therapies. We will also highlight bioartificial kidney studies, addressing the limitations of the development of this innovative technology.
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Affiliation(s)
- Sabrina Ribeiro Gonsalez
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho 373, Bloco J, sala 26, Rio de Janeiro, RJ 21941-902, Brazil
| | - Aline Leal Cortês
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho 373, Bloco J, sala 26, Rio de Janeiro, RJ 21941-902, Brazil
| | - Raquel Costa da Silva
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho 373, Bloco J, sala 26, Rio de Janeiro, RJ 21941-902, Brazil
| | - Jennifer Lowe
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho 373, sala I2-035, Rio de Janeiro, RJ 21941-902, Brazil
| | - Minolfa C Prieto
- Department of Physiology & Tulane Renal and Hypertension Center of Excellence, School of Medicine, Tulane University, New Orleans, LA 70112, USA
| | - Lucienne da Silva Lara
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho 373, Bloco J, sala 26, Rio de Janeiro, RJ 21941-902, Brazil.
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139
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Banerjee S, Wong ACY, Yan X, Wu B, Zhao H, Tibshirani RJ, Zare RN, Brooks JD. Early detection of unilateral ureteral obstruction by desorption electrospray ionization mass spectrometry. Sci Rep 2019; 9:11007. [PMID: 31358807 PMCID: PMC6662848 DOI: 10.1038/s41598-019-47396-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/16/2019] [Indexed: 01/08/2023] Open
Abstract
Desorption electrospray ionization mass spectrometry (DESI-MS) is an emerging analytical tool for rapid in situ assessment of metabolomic profiles on tissue sections without tissue pretreatment or labeling. We applied DESI-MS to identify candidate metabolic biomarkers associated with kidney injury at the early stage. DESI-MS was performed on sections of kidneys from 80 mice over a time course following unilateral ureteral obstruction (UUO) and compared to sham controls. A predictive model of renal damage was constructed using the LASSO (least absolute shrinkage and selection operator) method. Levels of lipid and small metabolites were significantly altered and glycerophospholipids comprised a significant fraction of altered species. These changes correlate with altered expression of lipid metabolic genes, with most genes showing decreased expression. However, rapid upregulation of PG(22:6/22:6) level appeared to be a hitherto unknown feature of the metabolic shift observed in UUO. Using LASSO and SAM (significance analysis of microarrays), we identified a set of well-measured metabolites that accurately predicted UUO-induced renal damage that was detectable by 12 h after UUO, prior to apparent histological changes. Thus, DESI-MS could serve as a useful adjunct to histology in identifying renal damage and demonstrates early and broad changes in membrane associated lipids.
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Affiliation(s)
- Shibdas Banerjee
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA.,Department of Chemistry, Indian Institute of Science Education and Research Tirupati, Tirupati, 517507, India
| | - Anny Chuu-Yun Wong
- Department of Urology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Xin Yan
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
| | - Bo Wu
- Department of Urology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Hongjuan Zhao
- Department of Urology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Robert J Tibshirani
- Departments of Biomedical Data Sciences, and of Statistics, Stanford University, Stanford, CA, 94305, USA
| | - Richard N Zare
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA.
| | - James D Brooks
- Department of Urology, Stanford University School of Medicine, Stanford, CA, 94305, USA.
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140
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Guan Y, Nakano D, Zhang Y, Li L, Tian Y, Nishiyama A. A mouse model of renal fibrosis to overcome the technical variability in ischaemia/reperfusion injury among operators. Sci Rep 2019; 9:10435. [PMID: 31320707 PMCID: PMC6639321 DOI: 10.1038/s41598-019-46994-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 07/08/2019] [Indexed: 12/16/2022] Open
Abstract
The ischaemia-reperfusion (I/R) model is a widely used model of acute kidney injury (AKI) and renal fibrosis. However, the ischaemia duration that is long enough to cause broad fibrosis shows that a high mortality rate and a short ischaemia duration does not cause fibrosis, resulting in a large variation in fibrosis progression in this experimental model. Inter-operator variation occurs for I/R injury severity because the I/R procedure is complex, which results in poor reproducibility of subsequent fibrosis in the model. In the present study, we developed a renal fibrosis model in which the fibrosis progression for 8 weeks is predictable within 8 days. Three operators independently performed I/R followed by uninephrectomy at day 7 in mice. The aim was to create a model that would show a blood urea nitrogen (BUN) level >100 mg/dL at day 8 after I/R (day 1 after uninephrectomy). Although the ischaemia duration to satisfy this BUN criterion differed among operators, the mice developed anaemia, polyuria, and fibrosis in a similar manner under the same BUN criterion with a low mortality rate. Interstitial fibrosis had developed at week 8, which was strongly correlated with the BUN at day 8. This protocol allows operators to adjust the ischaemia duration based on the BUN criterion and to separate mice into the desired number of groups based on the BUN to study interventions against renal fibrosis.
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Affiliation(s)
- Yu Guan
- Department of Pharmacology, Kagawa University Medical School, Kagawa, Japan.,Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Daisuke Nakano
- Department of Pharmacology, Kagawa University Medical School, Kagawa, Japan.
| | - Yifan Zhang
- Department of Pharmacology, Kagawa University Medical School, Kagawa, Japan.,Department of No.2 Orthopedics, Shijiazhuang City No.1 Hospital, Shijiazhuang, Hebei, China
| | - Lei Li
- Department of Pharmacology, Kagawa University Medical School, Kagawa, Japan
| | - Ye Tian
- Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Akira Nishiyama
- Department of Pharmacology, Kagawa University Medical School, Kagawa, Japan
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141
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Urine macrophages reflect kidney macrophage content during acute tubular interstitial and glomerular injury. Clin Immunol 2019; 205:65-74. [PMID: 31212026 DOI: 10.1016/j.clim.2019.06.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 05/03/2019] [Accepted: 06/13/2019] [Indexed: 01/19/2023]
Abstract
Macrophage polarization is a major contributing factor in acute kidney injury (AKI). We aim to determine its biomarker value in differentiating etiologic causes of various intrinsic renal AKI. A total of 205 patients with renal intrinsic AKI were enrolled. Urinary sCD163 was quantified and macrophage subtypes in urine and in renal biopsy were determined. Compared to healthy controls and AKI due to interstitial or tubular injuries (0 pg/μmol), urinary sCD163 was markedly higher in glomerulopathy, especially in diffuse proliferative glomerulonephritis (275.5 pg/μmol) and significantly correlated with cellular crescent formation. Urine sediment analysis of M1/M2 ratio could differentiate acute tubulointerstitial nephritis (M1/M2 > 2.35) from crescentic glomerulonephritis (M1/M2 < 0.27). Urinary sCD163 levels and M2 subtype positively correlated with infiltrated M2 in the glomeruli, whereas urine M1 positively correlated with infiltrated M1 in the interstitium. Of note, urinary sCD163 showed better diagnositic performance in differentiating disease etiologies compared to tradiational urinary biomarkers of AKI (NGAL and KIM-1) and markers of myeloid cells (CD11b) and pan macrophages (CD68). Thus markers of macrophage polarization could be viewed as the noninvasive "liquid biopsy" in the presence of various intrinsic kidney diseases.
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142
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Ji PY, Li ZY, Wang H, Dong JT, Li XJ, Yi HL. Arsenic and sulfur dioxide co-exposure induce renal injury via activation of the NF-κB and caspase signaling pathway. CHEMOSPHERE 2019; 224:280-288. [PMID: 30825854 DOI: 10.1016/j.chemosphere.2019.02.111] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/02/2019] [Accepted: 02/17/2019] [Indexed: 06/09/2023]
Abstract
Although emerging evidence suggests positive association of arsenic (As) or sulfur dioxide (SO2) exposure with human diseases, reports concerning the effects of co-exposure of As and SO2 are lacking. Moreover, there is insufficient information in the literature about As and SO2 co-exposure to renal injury. In this study, we focus on the environmental problems of excessive As and SO2 that co-exist in many coal consumption areas. We used both C57BL/6 mice and 293T cells to detect toxicities of As and SO2 exposure alone or in combination. Our results showed that co-exposure significantly increased the hazard compared with exposure to As or SO2 alone. Mouse kidney tissue slices showed that co-exposure caused more severe diffuse sclerosing glomerulonephritis than As and SO2 exposure alone. Meanwhile experiments showed that apoptosis was aggravated by co-exposure of As and SO2 in 293T cells. Because As and SO2 cause cell toxicity through increasing oxidative stress, next we detected ROS and other oxidative stress parameters, and the results showed oxidative stress was increased by co-exposure compared with the other three groups. The expression levels of downstream genes in the NF-κB and caspase pathways were higher in the co-exposure group than in the groups of As or SO2 exposure alone in mice and 293T cells. Based on the above results, co-exposure could induce higher toxicity in vitro and in vivo compared with single exposure to As or SO2, indicating that people living in places that contaminated by As and SO2 may have higher chance to get renal injury.
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Affiliation(s)
- Peng-Yu Ji
- School of Life Science, Shanxi University, Taiyuan, China; College of Environmental and Resource, Shanxi University, Taiyuan, China
| | - Zhuo-Yu Li
- School of Life Science, Shanxi University, Taiyuan, China
| | - Hong Wang
- School of Life Science, Shanxi University, Taiyuan, China; Monell Chemical Senses Center, Philadelphia, PA, USA
| | - Jin-Tang Dong
- School of Life Science, Shanxi University, Taiyuan, China; Emory University Winship Cancer Insititute, Atlanta, GA, USA
| | - Xiu-Juan Li
- School of Life Science, Shanxi University, Taiyuan, China; College of Environmental and Resource, Shanxi University, Taiyuan, China
| | - Hui-Lan Yi
- School of Life Science, Shanxi University, Taiyuan, China.
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143
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Chambers BE, Wingert RA. Nephron repair: powered by anaerobic energy metabolism. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:S28. [PMID: 31032308 DOI: 10.21037/atm.2019.01.73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Brooke E Chambers
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, University of Notre Dame, Notre Dame, IN, USA
| | - Rebecca A Wingert
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, Center for Zebrafish Research, University of Notre Dame, Notre Dame, IN, USA
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144
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Teixeira DE, Peruchetti DB, Silva LS, Silva-Aguiar RP, Oquendo MB, Silva-Filho JL, Takiya CM, Leal-Cardoso JH, Pinheiro AAS, Caruso-Neves C. Lithium ameliorates tubule-interstitial injury through activation of the mTORC2/protein kinase B pathway. PLoS One 2019; 14:e0215871. [PMID: 31002704 PMCID: PMC6474631 DOI: 10.1371/journal.pone.0215871] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 04/09/2019] [Indexed: 12/11/2022] Open
Abstract
Tubule-interstitial injury (TII) is a critical step in the progression of renal disease. It has been proposed that changes in proximal tubule (PT) albumin endocytosis plays an important role in the development of TII. Some reports have shown protective effects of lithium on kidney injury animal models that was correlated to proteinuria. We tested the hypothesis that lithium treatment ameliorates the development of TII due to changes in albumin endocytosis. Two experimental models were used: (1) TII induced by albumin overload in an animal model; (2) LLC-PK1 cells, a PT cell line. Lithium treatment ameliorates TII induced by albumin overload measured by (1) proteinuria; (2) collagen deposition; (3) area of tubule-interstitial space, and (4) macrophage infiltration. Lithium treatment increased mTORC2 activity leading to the phosphorylation of protein kinase B (PKB) at Ser473 and its activation. This mechanism enhanced albumin endocytosis in PT cells, which decreased the proteinuria observed in TII induced by albumin overload. This effect did not involve changes in the expression of megalin, a PT albumin receptor. In addition, activation of this pathway decreased apoptosis in LLC-PK1 cells, a PT cell line, induced by higher albumin concentration, similar to that found in pathophysiologic conditions. Our results indicate that the protective role of lithium treatment on TII induced by albumin overload involves an increase in PT albumin endocytosis due to activation of the mTORC2/PKB pathway. These results open new possibilities in understanding the effects of lithium on the progression of renal disease.
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Affiliation(s)
- Douglas E. Teixeira
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Diogo B. Peruchetti
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Leandro S. Silva
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Rodrigo P. Silva-Aguiar
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Morgana B. Oquendo
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Fortaleza, CE, Brazil
| | - João Luiz Silva-Filho
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Christina M. Takiya
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | | | - Ana Acacia S. Pinheiro
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Celso Caruso-Neves
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, INCT-Regenera, Conselho Nacional de Desenvolvimento Científico e Tecnológico/MCT, Rio de Janeiro, Brazil
- * E-mail:
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145
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Acute kidney injury to chronic kidney disease transition: insufficient cellular stress response. Curr Opin Nephrol Hypertens 2019; 27:314-322. [PMID: 29702491 DOI: 10.1097/mnh.0000000000000424] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE OF REVIEW Recent epidemiological and preclinical mechanistic studies provide strong evidence that acute kidney injury (AKI) and chronic kidney disease (CKD) form an interconnected syndrome. Injured kidneys undergo a coordinated reparative process with an engagement of multiple cell types after injury; however, maladaptation to the injury subjects kidneys to a vicious cycle of fibrogenesis and nephron loss. In this review, we will outline and discuss the pathogenesis of AKI-to-CKD transition with an emphasis on dysregulated 'cellular stress adaptation' as a potential therapeutic target. RECENT FINDINGS Recent studies identify the crucial role of injured tubular epithelial cells in the transition from AKI to CKD. Damaged tubular cells undergo reactivation of developmental and epithelial-mesenchymal transition signaling, metabolic alteration, and cell-cycle arrest, thereby driving inflammation and fibrogenesis. Recent work highlights that cellular stress-adaptive pathways against hypoxic and oxidative stress provide insufficient protection after severe AKI episode. SUMMARY Insufficient cellular stress adaptation may underpin the persistent activation of inflammatory and fibrogenic signaling in damaged kidneys. We propose that harnessing cellular stress-adaptive responses will be a promising therapeutic strategy to halt or even reverse the deleterious process of AKI-to-CKD transition.
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146
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Biglycan evokes autophagy in macrophages via a novel CD44/Toll-like receptor 4 signaling axis in ischemia/reperfusion injury. Kidney Int 2019; 95:540-562. [PMID: 30712922 DOI: 10.1016/j.kint.2018.10.037] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 10/09/2018] [Accepted: 10/24/2018] [Indexed: 01/14/2023]
Abstract
Biglycan, a small leucine-rich proteoglycan, acts as a danger signal and is classically thought to promote macrophage recruitment via Toll-like receptors (TLR) 2 and 4. We have recently shown that biglycan signaling through TLR 2/4 and the CD14 co-receptor regulates inflammation, suggesting that TLR co-receptors may determine whether biglycan-TLR signaling is pro- or anti-inflammatory. Here, we sought to identify other co-receptors and characterize their impact on biglycan-TLR signaling. We found a marked increase in the number of autophagic macrophages in mice stably overexpressing soluble biglycan. In vitro, stimulation of murine macrophages with biglycan triggered autophagosome formation and enhanced the flux of autophagy markers. Soluble biglycan also promoted autophagy in human peripheral blood macrophages. Using macrophages from mice lacking TLR2 and/or TLR4, CD14, or CD44, we demonstrated that the pro-autophagy signal required TLR4 interaction with CD44, a receptor involved in adhesion, migration, lymphocyte activation, and angiogenesis. In vivo, transient overexpression of circulating biglycan at the onset of renal ischemia/reperfusion injury (IRI) enhanced M1 macrophage recruitment into the kidneys of Cd44+/+ and Cd44-/- mice but not Cd14-/- mice. The biglycan-CD44 interaction increased M1 autophagy and the number of renal M2 macrophages and reduced tubular damage following IRI. Thus, CD44 is a novel signaling co-receptor for biglycan, an interaction that is required for TLR4-CD44-dependent pro-autophagic activity in macrophages. Interfering with the interaction between biglycan and specific TLR co-receptors could represent a promising therapeutic intervention to curtail kidney inflammation and damage.
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147
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Jordan SC, Choi J, Aubert O, Haas M, Loupy A, Huang E, Peng A, Kim I, Louie S, Ammerman N, Najjar R, Puliyanda D, Vo A. A phase I/II, double-blind, placebo-controlled study assessing safety and efficacy of C1 esterase inhibitor for prevention of delayed graft function in deceased donor kidney transplant recipients. Am J Transplant 2018; 18:2955-2964. [PMID: 29637714 DOI: 10.1111/ajt.14767] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 03/28/2018] [Accepted: 03/29/2018] [Indexed: 01/25/2023]
Abstract
Delayed graft function (DGF) is defined as need for dialysis early posttransplant. DGF is related to ischemia-reperfusion injury (IRI) that diminishes allograft function and may be complement dependent. Here, we investigate the ability of C1 esterase inhibitor (C1INH) to prevent IRI/DGF in kidney transplant recipients. Seventy patients receiving deceased donor kidney transplants at risk for DGF were randomized to receive C1INH 50 U/kg (#35) or placebo (#35) intraoperatively and at 24 hours. The primary end point was need for hemodialysis during the first week posttransplant. Assessments of glomerular filtration rate and dialysis dependence were accomplished. Complications and safety of therapy were recorded. Similar characteristics with no significant differences in cold-ischemia time or risk factors for DGF were seen. C1INH did not result in reduction of dialysis sessions at 1 week posttransplant, but significantly fewer dialysis sessions (P = .0232) were required 2 to 4 weeks posttransplant. Patients at highest risk for DGF (Kidney Donor Profile Index ≥85) benefited most from C1INH therapy. Significantly better renal function was seen at 1 year in C1INH patients (P = .006). No significant adverse events were noted with C1INH. Although the primary end point was not met, significant reductions in need for dialysis and improvements in long-term allograft function were seen with C1INH treatment.
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Affiliation(s)
- Stanley C Jordan
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Jua Choi
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Olivier Aubert
- Paris Translational Research Center for Organ Transplantation, INSERM U970, Biostatistics Department, Paris, France
| | - Mark Haas
- Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Alexandre Loupy
- Paris Translational Research Center for Organ Transplantation, INSERM U970, Biostatistics Department, Paris, France
| | - Edmund Huang
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Alice Peng
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Irene Kim
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Sabrina Louie
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Noriko Ammerman
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Reiad Najjar
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Dechu Puliyanda
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Ashley Vo
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA
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148
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Monteiro MB, Ramm S, Chandrasekaran V, Boswell SA, Weber EJ, Lidberg KA, Kelly EJ, Vaidya VS. A High-Throughput Screen Identifies DYRK1A Inhibitor ID-8 that Stimulates Human Kidney Tubular Epithelial Cell Proliferation. J Am Soc Nephrol 2018; 29:2820-2833. [PMID: 30361326 PMCID: PMC6287872 DOI: 10.1681/asn.2018040392] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 09/20/2018] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The death of epithelial cells in the proximal tubules is thought to be the primary cause of AKI, but epithelial cells that survive kidney injury have a remarkable ability to proliferate. Because proximal tubular epithelial cells play a predominant role in kidney regeneration after damage, a potential approach to treat AKI is to discover regenerative therapeutics capable of stimulating proliferation of these cells. METHODS We conducted a high-throughput phenotypic screen using 1902 biologically active compounds to identify new molecules that promote proliferation of primary human proximal tubular epithelial cells in vitro. RESULTS The primary screen identified 129 compounds that stimulated tubular epithelial cell proliferation. A secondary screen against these compounds over a range of four doses confirmed that eight resulted in a significant increase in cell number and incorporation of the modified thymidine analog EdU (indicating actively proliferating cells), compared with control conditions. These eight compounds also stimulated tubular cell proliferation in vitro after damage induced by hypoxia, cadmium chloride, cyclosporin A, or polymyxin B. ID-8, an inhibitor of dual-specificity tyrosine-phosphorylation-regulated kinase 1A (DYRK1A), was the top candidate identified as having a robust proproliferative effect in two-dimensional culture models as well as a microphysiologic, three-dimensional cell culture system. Target engagement and genetic knockdown studies and RNA sequencing confirmed binding of ID-8 to DYRK1A and upregulation of cyclins and other cell cycle regulators, leading to epithelial cell proliferation. CONCLUSIONS We have identified a potential first-in-class compound that stimulates human kidney tubular epithelial cell proliferation after acute damage in vitro.
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Affiliation(s)
- Maria B Monteiro
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts
| | - Susanne Ramm
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Vidya Chandrasekaran
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts
| | - Sarah A Boswell
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts
| | - Elijah J Weber
- Department of Pharmaceutics, University of Washington, Seattle, Washington; and
| | - Kevin A Lidberg
- Department of Pharmaceutics, University of Washington, Seattle, Washington; and
| | - Edward J Kelly
- Department of Pharmaceutics, University of Washington, Seattle, Washington; and
| | - Vishal S Vaidya
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts;
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
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Zhu CZ, Doyle KJ, Nikkel AL, Olsen L, Namovic MT, Salte K, Widomski D, Su Z, Donnelly-Roberts DL, Gopalakrishnan MM, McGaraughty S. Short-term oral gavage administration of adenine induces a model of fibrotic kidney disease in rats. J Pharmacol Toxicol Methods 2018; 94:34-43. [DOI: 10.1016/j.vascn.2018.04.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 03/28/2018] [Accepted: 04/19/2018] [Indexed: 11/25/2022]
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150
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Tang C, Ma Z, Zhu J, Liu Z, Liu Y, Liu Y, Cai J, Dong Z. P53 in kidney injury and repair: Mechanism and therapeutic potentials. Pharmacol Ther 2018; 195:5-12. [PMID: 30347214 DOI: 10.1016/j.pharmthera.2018.10.013] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Acute kidney injury (AKI) is a major kidney disease with poor clinical outcome. Besides its acute consequence of high mortality, AKI may also contribute significantly to the occurrence and progression of chronic kidney diseases (CKD). Accumulating evidence has demonstrated that maladaptive and incomplete kidney repair after AKI leads to the development of renal fibrosis and, ultimately, CKD. p53, a well-known tumor suppressor, plays a critical role in AKI and subsequent kidney repair through the regulation of various cell biologic processes, including apoptosis, cell cycle arrest, and autophagy. Despite the notable progress in deciphering the involvement of p53 in kidney injury and repair, the underlying mechanisms of p53 in these pathological processes remain largely unknown. Further investigation in this area is essential for the application of p53 as therapeutic target to prevent and treat AKI or impede its progression to CKD. In this review, we summarize the recent advances in understanding p53 regulation of AKI and kidney repair, pinpoint the potential of p53 as a therapeutic target, and present future research interests and directions.
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Affiliation(s)
- Chengyuan Tang
- Department of Nephrology, Key Laboratory of Kidney Disease and Blood Purification in Hunan, The Second Xiangya Hospital at Central South University, Changsha, Hunan, China
| | - Zhengwei Ma
- Department of Cellular Biology and Anatomy, Charlie Norwood VA Medical Center, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Jiefu Zhu
- Department of Nephrology, Key Laboratory of Kidney Disease and Blood Purification in Hunan, The Second Xiangya Hospital at Central South University, Changsha, Hunan, China
| | - Zhiwen Liu
- Department of Nephrology, Key Laboratory of Kidney Disease and Blood Purification in Hunan, The Second Xiangya Hospital at Central South University, Changsha, Hunan, China
| | - Yuxue Liu
- Department of Nephrology, Key Laboratory of Kidney Disease and Blood Purification in Hunan, The Second Xiangya Hospital at Central South University, Changsha, Hunan, China
| | - Yu Liu
- Department of Nephrology, Key Laboratory of Kidney Disease and Blood Purification in Hunan, The Second Xiangya Hospital at Central South University, Changsha, Hunan, China
| | - Juan Cai
- Department of Nephrology, Key Laboratory of Kidney Disease and Blood Purification in Hunan, The Second Xiangya Hospital at Central South University, Changsha, Hunan, China
| | - Zheng Dong
- Department of Nephrology, Key Laboratory of Kidney Disease and Blood Purification in Hunan, The Second Xiangya Hospital at Central South University, Changsha, Hunan, China; Department of Cellular Biology and Anatomy, Charlie Norwood VA Medical Center, Medical College of Georgia at Augusta University, Augusta, GA, USA.
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