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Li J, Wang L, Wang B, Zhang Z, Jiang L, Qin Z, Zhao Y, Su B. NOX4 is a potential therapeutic target in septic acute kidney injury by inhibiting mitochondrial dysfunction and inflammation. Theranostics 2023; 13:2863-2878. [PMID: 37284448 PMCID: PMC10240817 DOI: 10.7150/thno.81240] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 04/25/2023] [Indexed: 06/08/2023] Open
Abstract
Rationale: Sepsis is a severe clinical syndrome featured through organ dysfunction due to infection, while the accompanying acute kidney injury (AKI) is linked to significant incidence of morbidity as well as mortality. Recently, emerging evidence has revealed that nicotinamide adenine dinucleotide phosphate (NADPH) oxidase 4 (NOX4) is implicated in various renal diseases, while its role and modulation in septic acute kidney injury (S-AKI) remains largely unknown. Methods: In vivo, S-AKI in wild-type and renal tubular epithelial cell (RTEC)-specific NOX4 knockout mice was induced by lipopolysaccharides (LPS) injection or cecal ligation and puncture (CLP). In vitro, TCMK-1 (mouse kidney tubular epithelium cell line) cells were treated with LPS. Serum and supernatant biochemical, mitochondrial dysfunctional, inflammatory and apoptotic parameters were measured and compared across groups. The activation of reactive oxygen species (ROS) and NF-κB signaling was also assessed. Results: NOX4 was predominantly upregulated in RTECs of S-AKI mouse model induced by LPS/CLP and cultured TCMK-1 cells exposed to LPS. RTEC-specific deletion of NOX4 or pharmacological inhibition of NOX4 by GKT137831 both alleviated LPS/CLP-injured renal function and pathology in mice. Furthermore, NOX4 inhibition alleviated mitochondrial dysfunction supported by ultrastructural damage, reduction of ATP production and mitochondrial dynamics imbalance, together with inflammation and apoptosis in kidney injured by LPS/CLP and TCMK-1 cells injured by LPS, while NOX4 overexpression aggravated the above-mentioned indices in TCMK-1 cells with LPS stimulation. Mechanism-wise, the raised NOX4 in RTECs may induce ROS and NF-κB signaling activation in S-AKI. Conclusions: Collectively, genetic or pharmacological inhibition of NOX4 protects from S-AKI by reducing generation of ROS and activation of NF-κB signal, which suppress mitochondrial dysfunction, inflammation together with apoptosis. NOX4 may act as a novel target for the S-AKI therapy.
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Affiliation(s)
- Jiameng Li
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Liya Wang
- Department of Nephrology, Kidney Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Bo Wang
- Department of Nephrology, Kidney Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zhuyun Zhang
- Department of Nephrology, Kidney Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Luojia Jiang
- Department of Nephrology, Jiujiang No. 1 People's Hospital, Jiujiang 332000, China
| | - Zheng Qin
- Department of Nephrology, Kidney Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yuliang Zhao
- Department of Nephrology, Kidney Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Baihai Su
- Department of Nephrology, Kidney Research Institute, West China Hospital, Sichuan University, Chengdu 610041, China
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Pang R, Dong L, Liu J, Ji X, Zhuang H, Duan M. The study on role of endothelial cell autophagy in rats with sepsis-induced acute kidney injury. Heliyon 2023; 9:e13796. [PMID: 36873534 PMCID: PMC9976300 DOI: 10.1016/j.heliyon.2023.e13796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
Sepsis often causes acute kidney injury (AKI). Autophagy of renal tubular epithelial cells is considered a cytoprotective mechanism in septic AKI; however, the role of autophagy of renal endothelial cells is uninvestigated. The current study examined whether autophagy was induced by sepsis in renal endothelial cells and whether induction of autophagy in these cells attenuated the degree of AKI. Cecal ligation and puncture (CLP) was used as a model of sepsis in rats. Four experimental groups included: sham, CLP alone, CLP + rapamycin (RAPA), and CLP + dimethyl sulfoxide (DMSO), where RAPA was used as an activator of autophagy. CLP increased renal LC3-II protein levels with an additional transient increase by RAPA at 18 h. In addition, CLP induced autophagosome formation in renal endothelial cells had an additional increase induced by RAPA. Interestingly, the levels of bone morphogenetic protein and activin membrane-bound inhibitor (BAMBI), an endothelial cell-specific protein in the kidney, were also increased by CLP, albeit it was transiently downregulated by RAPA at 18 h. Serum thrombomodulin increased and renal vascular endothelial (VE)-cadherin decreased following CLP, and these changes were attenuated by RAPA. The renal cortex exhibited and inflammatory tissue damage after CLP, and RAPA alleviated these histopathological injuries. The current findings indicate that autophagy was induced by sepsis in renal endothelial cells, and upregulation of autophagy in these cells alleviated endothelial injury and AKI. In addition, BAMBI was induced by sepsis in the kidney, which may play a role in regulating endothelial stability in septic AKI.
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Affiliation(s)
- Ran Pang
- Department of Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Lei Dong
- Department of Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Jingfeng Liu
- Department of Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiaojun Ji
- Department of Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Haizhou Zhuang
- Department of Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Meili Duan
- Department of Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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Wang L, Bayinchahan B, Zhang D, Wang Z, Xiao D. The novel biomarker circ_0020339 drives septic acute kidney injury by targeting miR-17-5p/IPMK axis. Int Urol Nephrol 2023; 55:437-448. [PMID: 35986866 DOI: 10.1007/s11255-022-03331-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 07/25/2022] [Indexed: 01/25/2023]
Abstract
PURPOSE Sepsis is a systemic life-threatening inflammatory disease, which leads to septic acute kidney injury (AKI). Circular RNAs (circRNAs) are involved in septic AKI. Herein, we aimed to expound the action of circ_0020339 in septic AKI. The dysregulation of plasma circRNAs between patients with septic non-AKI and patients with septic AKI were screened by circRNA chip. METHODS The dysregulation of circ_0020339, microRNA (miR)-17-5p, and inositol polyphosphate multi kinase (IPMK) mRNA was detected by quantitative real-time polymerase chain reaction (qRT-PCR). Cell viability and apoptosis were measured by cell counting kit-8 (CCK-8) and flow cytometry, respectively. The release of serum creatinine (SCr), tissue inhibitor metalloproteinase-2 (TIMP-2), insulin-like growth factor binding protein-7 (IGFBP7), tumor necrosis factor (TNF)α and interleukin (IL)-1β was evaluated by enzyme-linked immunosorbent assay (ELISA). Bioinformatic analysis, dual-luciferase reporter assay and miRNA pull down assay were used to confirm the interaction between miR-17-5p and circ_0020339 or IPMK 3'untranslated region (UTR). Protein level of IPMK, TNF receptor-associated factor 6 (TRAF6), phosphorylated AKT (p-AKT)/total (t)-AKT, p-nuclear factor kappa-B (NF-κB) kinase (p-IKK)/t-IKK, p-inhibitor of NF-κB (p-IκB)α/t-IκBα, and p-p65/t-p65 were conducted by western blot. RESULTS Circ_0020339 was upregulated in the plasma of patients with septic AKI as well as LPS-treated HK2 cells and C57BL/6 mice relative to the corresponding counterparts. Functionally, circ_0020339 was positively correlated with markers of renal functional injury and inflammation in patients with septic AKI; si-circ_0020339 facilitated cell proliferation, while restrained cell apoptosis and inflammation in LPS-triggered HK2 cells; meanwhile, si-circ_0020339 restrained survival rate, renal functional injury and inflammation in LPS-triggered C57BL/6 mice. Furthermore, circ_0020339 and IPMK 3'UTR shared the same complementary sites with miR-17-5p. CONCLUSION si-circ_0020339 attenuated LPS-induced cell damage by targeting miR-17-5p/IPMK axis and inactivation of TRAF6/p-AKT/p-IKK/p-IκBα/p-p65. Altogether, plasma circ_0020339 serves as a novel diagnostic marker of patients with septic AKI.
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Affiliation(s)
- Lu Wang
- Department of Critical Care, People's Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Road, Urumqi, 830001, Xinjiang, China
| | - Boranyi Bayinchahan
- Department of Critical Care, People's Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Road, Urumqi, 830001, Xinjiang, China
| | - Daquan Zhang
- Department of Critical Care, People's Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Road, Urumqi, 830001, Xinjiang, China
| | - Zhigao Wang
- Department of Critical Care, People's Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Road, Urumqi, 830001, Xinjiang, China
| | - Dong Xiao
- Department of Critical Care, People's Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Road, Urumqi, 830001, Xinjiang, China.
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Peng X, Chen S, Wang Y, Jin M, Mei F, Bao Y, Liao X, Chen Y, Gong W. SGLT2i reduces renal injury by improving mitochondrial metabolism and biogenesis. Mol Metab 2022:101613. [PMID: 36241142 DOI: 10.1016/j.molmet.2022.101613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 10/02/2022] [Accepted: 10/10/2022] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Despite advances in treatment, an effective therapeutic strategy for acute kidney injury (AKI) is still lacking. Considering the widely reported clinical benefits of canagliflozin in the kidneys, we assessed the effects of canagliflozin on AKI. METHODS Lipopolysaccharide was used to induce AKI in the presence of canagliflozin. RESULTS Canagliflozin treatment reduced blood urea nitrogen and serum creatinine levels and improved the renal tubular structure in mice with lipopolysaccharide-induced septic AKI. Canagliflozin also suppressed the inflammatory response, oxidative stress and tubular cell death in the kidneys during septic AKI. In vitro, canagliflozin supplementation maintained mitochondrial function in lipopolysaccharide-treated HK-2 cells by restoring the mitochondrial membrane potential, inhibiting mitochondrial reactive oxygen species production and normalizing mitochondrial respiratory complex activity. In HK-2 cells, canagliflozin stimulated the adenosine monophosphate-activated protein kinase catalytic subunit alpha 1 (AMPKα1)/peroxisome proliferator-activated receptor-gamma coactivator 1 alpha (PGC1α)/nuclear respiratory factor 1 (NRF1) pathway, thus elevating the number of live and healthy mitochondria following lipopolysaccharide treatment. Inhibition of the AMPKα1/PGC1α/NRF1/mitochondrial biogenesis pathway abolished the protective effects of canagliflozin on renal cell mitochondria and tubular viability. Similarly, the protective effects of canagliflozin on kidney function and tubular structure were abrogated in AMPKα1-knockout mice. CONCLUSIONS Canagliflozin could be used to treat septic AKI by activating the AMPKα1/PGC1α/NRF1/mitochondrial biogenesis pathway.
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Affiliation(s)
- Xiaojie Peng
- Department of Gastroenterology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China; The Third School of Clinical Medicine, Southern Medical University, Shenzhen, Guangdong, China; Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou city, Guangdong province, China
| | - Shuze Chen
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University Guangzhou city, Guangdong province, China
| | - Ying Wang
- Department of Gastroenterology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China
| | - Ming Jin
- Department of Gastroenterology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China; Integrative Microecology Center, Department of Gastroenterology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China
| | - Fen Mei
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou city, Guangdong province, China
| | - Yun Bao
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou city, Guangdong province, China
| | - Xixian Liao
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou city, Guangdong province, China
| | - Ye Chen
- Department of Gastroenterology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China; Department of Gastroenterology, Nanfang Hospital, Southern Medical University Guangzhou city, Guangdong province, China; Integrative Microecology Center, Department of Gastroenterology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China.
| | - Wei Gong
- Department of Gastroenterology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China; The Third School of Clinical Medicine, Southern Medical University, Shenzhen, Guangdong, China.
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Tang Y, Wang C, Chen S, Li L, Zhong X, Zhang J, Feng Y, Wang L, Chen J, Yu M, Wang F, Wang L, Li G, He Y, Li Y. Dimethyl fumarate attenuates LPS induced septic acute kidney injury by suppression of NFκB p65 phosphorylation and macrophage activation. Int Immunopharmacol 2021; 102:108395. [PMID: 34915410 DOI: 10.1016/j.intimp.2021.108395] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 11/02/2021] [Accepted: 11/19/2021] [Indexed: 02/08/2023]
Abstract
Septic acute kidney injury (AKI) always accounts for high mortality of septic patients in ICU. Due to its not well understood mechanism for infection and immune-regulation in kidney dysfunction, there is a lack of effective therapy without side effects. Dimethyl fumarate (DMF) as an immunomodulatory molecule has been approved for treatment to multiple sclerosis. However, the therapeutic effect and immunomodulatory role underlying DMF action in septic AKI is unclear. This study aimed to elucidate the role of DMF in lipopolysaccharide (LPS)-induced septic AKI involving macrophage regulation. In current study, we administered DMF by oral gavage to mice with LPS-induced AKI, then harvested serum and kidney at three different time points. We further isolated Bone marrow-derived macrophages (BMDMs) from mice and stimulated them with LPS followed by DMF treatment. To explore immunomodulatory role of DMF in macrophages, we depleted macrophages in mice using liposomal clodronate after DMF treatment upon LPS-induced septic AKI. Then we observed that DMF attenuated renal dysfunction and murine pathological kidney injury after LPS injection. DMF could inhibit translocation of phosphorylated NF-κB p65 and suppress macrophage activation in LPS-induced AKI. DMF reduced the secretion of TNF-α and IL-6 whereas increased the secretion of IL-10 and Arg-1 in BMDMs after LPS stimulation. DMF also inhibited NF-κB p65 phosphorylation in BMDMs after LPS stimulation. Importantly, the effect of DMF against LPS-induced AKI, macrophage activation, and translocation of phosphorylated NF-κB p65 was impaired upon macrophage depletion. Thus, DMF could attenuate LPS-induced septic AKI by suppression of NF-κB p65 phosphorylation and macrophage activation. This work suggested the potential therapeutic role of DMF for patients in ICU threatened by septic AKI.
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Affiliation(s)
- Yun Tang
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China
| | - Chan Wang
- Department of Nephrology, Nuclear Industry 416 Hospital, Chengdu, Sichuan 610041, China
| | - Shasha Chen
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Li Li
- Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Xiang Zhong
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Jiong Zhang
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Yunlin Feng
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Lin Wang
- Institute of Laboratory Animal Sciences, School of Medicine, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China
| | - Jie Chen
- Central laboratory, School of Medicine, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China
| | - Meidie Yu
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China
| | - Fang Wang
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Li Wang
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Guisen Li
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China.
| | - Yarong He
- Emergency Medicine Department, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.
| | - Yi Li
- Department of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Sichuan Clinical Research Center for Kidney Diseases, Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China.
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Wang F, Zhang F, Tian Q, Sheng K. CircVMA21 ameliorates lipopolysaccharide (LPS)-induced HK-2 cell injury depending on the regulation of miR-7-5p/PPARA. Autoimmunity 2021; 55:136-146. [PMID: 34894921 DOI: 10.1080/08916934.2021.2012764] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Accumulating evidence suggests that circular RNAs (circRNAs) are implicated in diverse human diseases, including sepsis-engendered acute kidney injury (AKI). In this study, we investigated the functions of circRNA vacuolar ATPase assembly factor VMA21 (circVMA21) in septic AKI through establishing septic AKI in vitro model. Quantitative real-time polymerase chain reaction (qRT-PCR) assay was adopted to determine the levels of circVMA21, microRNA-7-5p (miR-7-5p) and peroxisome proliferator activated receptor alpha (PPARA) mRNA. Cell Counting Kit-8 (CCK-8) assay and flow cytometry analysis were conducted to evaluate cell viability and apoptosis. Western blot assay was used for protein levels. Enzyme-linked immunosorbent assay (ELISA) was performed for the secretion of inflammatory cytokines. The levels of oxidative stress markers were examined with specific commercial kits. Dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay were utilized the analyse the relationships among circVMA21, miR-7-5p and PPARA. CircVMA21 was reduced in sepsis patients' serums and LPS-stimulated HK2 cells. CircVMA21 overexpression reversed the suppressive effect on cell viability and the promotional effects on cell apoptosis, inflammation and oxidative stress in HK2 cells mediated by LPS. CircVMA21 was identified as the sponge for miR-7-5p. MiR-7-5p overexpression abrogated the impacts of circVMA21 elevation on cell viability, apoptosis, inflammation and oxidative stress in LPS-stimulated HK2 cells. MiR-7-5p directly targeted PPARA, and miR-7-5p inhibition ameliorated LPS-induced HK2 cell damage by targeting PPARA. CircVMA21 overexpression alleviated LPS-stimulated HK2 cell damage through the regulation of miR-7-5p/PPARA.
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Affiliation(s)
- Fu Wang
- Department of Intensive Care, The Second People's Hospital of Zhangye, Zhangye City, China
| | - Fangfang Zhang
- The Second Department of Orthopaedics, Zhangye People's Hospital, Hexi University, Zhangye City, China
| | | | - Kai Sheng
- Department of Cardiac Intensive Care Unit, Lanzhou University Second Hospital, Lanzhou,China
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Yuan W, Xiong X, Du J, Fan Q, Wang R, Zhang X. LncRNA PVT1 accelerates LPS-induced septic acute kidney injury through targeting miR-17-5p and regulating NF-κB pathway. Int Urol Nephrol 2021; 53:2409-2419. [PMID: 34089461 DOI: 10.1007/s11255-021-02905-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 05/30/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Long noncoding RNA PVT1 is associated with diverse human diseases, including acute kidney injury (AKI). However, our understandings of PVT1 on septic AKI are limited. METHODS The septic AKI model was constructed through lipopolysaccharide (LPS) treatment. PVT1 and miR-17-5p levels were measured using qRT-PCR analysis. The concentrations of inflammatory cytokines were determined with ELISA kits. Cell viability and apoptosis were assessed using CCK-8 assay and flow-cytometric analysis, respectively. Protein levels were examined using western blot assay. The targeting association between miR-17-5p and PVT1 was verified by dual-luciferase reporter, RIP and RNA pull-down assays. RESULTS PVT1 level was elevated and miR-17-5p level was declined in septic AKI patients' serum and LPS-stimulated HK-2 cells. Cell viability was suppressed and cell apoptosis and inflammation were promoted after LPS treatment. PVT1 knockdown or miR-17-5p elevation restored LPS-mediated HK-2 cell injury. MiR-17-5p was sponged by PVT1, and its inhibition weakened the impact of PVT1 deficiency on LPS-mediated injury of HK-2 cells. In addition, PVT1 knockdown inactivated NF-κB pathway mediated by LPS treatment, but miR-17-5p inhibition further reversed this effect. CONCLUSION PVT1 knockdown promoted cell viability, suppressed inflammatory response and apoptosis by regulating miR-17-5p expression and NF-κB pathway in LPS-stimulated HK-2 cells.
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Affiliation(s)
- Wensheng Yuan
- Emergency Department, Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University, Jingzhou, No. 1 Renmin Road, Jingzhou, 433000, Hubei, China.
| | - Xiaoqing Xiong
- Emergency Department, Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University, Jingzhou, No. 1 Renmin Road, Jingzhou, 433000, Hubei, China
| | - Jinlong Du
- ICU Department, Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University, Jingzhou, Hubei, China
| | - Qi Fan
- ICU Department, Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University, Jingzhou, Hubei, China
| | - Rong Wang
- ICU Department, Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University, Jingzhou, Hubei, China
| | - Xia Zhang
- ICU Department, Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University, Jingzhou, Hubei, China
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Chen ZD, Hu BC, Shao XP, Hong J, Zheng Y, Zhang R, Shao ZQ, Liu JQ, Yang XH, Sun RH, Mo SJ. Ascorbate uptake enables tubular mitophagy to prevent septic AKI by PINK1-PARK2 axis. Biochem Biophys Res Commun 2021; 554:158-165. [PMID: 33798942 DOI: 10.1016/j.bbrc.2021.03.103] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 03/19/2021] [Indexed: 12/14/2022]
Abstract
Ascorbate (Vitamin C) has been proposed as a promising therapeutic agent against sepsis in clinical trials, but there is little experimental evidence on its anti-septic efficacy. We report that Toll-like receptor 4 (TLR4) activation by LPS stimuli augments ascorbate uptake in murine and human tubular cells through upregulation of two ascorbate transporters SVCT-1 and -2 mediated by Fn14/SCFFbxw7α cascade. Ascorbate restriction, or knockout of SVCT-1 and -2, the circumstance reminiscent to blockade of ascorbate uptake, endows tubular cells more vulnerable to the LPS-inducible apoptosis, whereas exogenous administration of ascorbate overrides the ruin execution, for which the PINK1-PARK2, rather than BNIP3-NIX axis is required. Ascorbate increases, while SVCT-1 and -2 knockout or ascorbate restriction dampens tubular mitophagy upon LPS stimuli. Treatment of endotoxemic mice with high-dose ascorbate confers mitophagy and substantial protection against mortality and septic acute kidney injury (AKI). Our work provides a rationale for clinical management of septic AKI with high doses of ascorbate.
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Affiliation(s)
- Zhi-Dong Chen
- Department of Intensive Care Unit, The First Affiliated Hospital of Huzhou Normal College, Huzhou, 313000, Zhejiang, PR China
| | - Bang-Chuan Hu
- Department of Intensive Care Unit, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, PR China
| | - Xue-Ping Shao
- Department of Intensive Care Unit, The First Affiliated Hospital of Huzhou Normal College, Huzhou, 313000, Zhejiang, PR China
| | - Jun Hong
- Department of Intensive Care Unit, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, PR China
| | - Yang Zheng
- Department of Intensive Care Unit, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, PR China
| | - Run Zhang
- Department of Intensive Care Unit, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, PR China
| | - Zi-Qiang Shao
- Department of Intensive Care Unit, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, PR China
| | - Jin-Quan Liu
- Department of Intensive Care Unit, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, PR China
| | - Xiang-Hong Yang
- Department of Intensive Care Unit, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, PR China
| | - Ren-Hua Sun
- Department of Intensive Care Unit, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, PR China
| | - Shi-Jing Mo
- Department of Intensive Care Unit, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, PR China.
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Xu J, Ma X, Yu K, Wang R, Wang S, Liu R, Liu H, Gao H, Yu K, Wang C. Lactate up-regulates the expression of PD-L1 in kidney and causes immunosuppression in septic Acute Renal Injury. J Microbiol Immunol Infect 2019; 54:404-410. [PMID: 31727535 DOI: 10.1016/j.jmii.2019.10.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 09/12/2019] [Accepted: 10/08/2019] [Indexed: 12/29/2022]
Abstract
BACKGROUND This study aims to explore the mechanism of immunosuppression in septic Acute Renal Injury (AKI) and the role of programmed death-1 (PD-1/PD-L1) pathway in septic AKI. METHODS This study established a septic AKI model by Cecal ligation and puncture (CLP) in C57/B6 mice, ELISA was used to test the level of lactate and creatinine in serum, blood was collected for flow cytometry and kidney samples for Western blot analyses. This study further analyzed the expression of PD-L1 in kidney and the expression of PD-1 in CD4+, CD8+ T cell, and the number of CD3+ T cells to identify apoptosis in T cells in the blood. RESULTS The CLP sepsis model induced AKI in C57/B6 mice; The expression of PD-1 and PD-L1 were increased in septic AKI mice; PD-1/PD-L1 induced apoptosis in T cells: the number of lymphocytes decreased by 64%, while the number of CD3+ T cells decreased by 27% compared with the sham group; Results also indicated that lactate up-regulates expression of PD-L1 in the kidney. CONCLUSIONS Lactate activated PD-1/PD-L1 pathway can induce immunosuppression by inducing apoptosis in lymphocytes in septic AKI. Moreover, blocking the receptor of lactate or PD-1/PD-L1 might be a new therapy for septic AKI.
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Affiliation(s)
- Jingjing Xu
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, 150081, China
| | - Xiaohui Ma
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, 150081, China
| | - Kaili Yu
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, 150081, China
| | - Ruitao Wang
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, 150081, China
| | - Sicong Wang
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, 150081, China
| | - Ruijin Liu
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, 150081, China
| | - Haitao Liu
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, 150081, China
| | - Hong Gao
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, 150081, China
| | - Kaijiang Yu
- Department of Critical Care Medicine, the First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Harbin, Heilongjiang, 150001, China.
| | - Changsong Wang
- Department of Critical Care Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, 150081, China.
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Stoyanoff TR, Rodríguez JP, Todaro JS, Colavita JPM, Torres AM, Aguirre MV. Erythropoietin attenuates LPS-induced microvascular damage in a murine model of septic acute kidney injury. Biomed Pharmacother 2018; 107:1046-1055. [PMID: 30257316 DOI: 10.1016/j.biopha.2018.08.087] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 07/30/2018] [Accepted: 08/15/2018] [Indexed: 01/20/2023] Open
Abstract
Acute kidney injury (AKI) is a frequent complication of sepsis, with a high mortality. Hallmarks of septic-AKI include inflammation, endothelial injury, and tissue hypoxia. Therefore, it would be of interest to develop therapeutic approaches for improving the microvascular damage in septic-AKI. Erythropoietin (EPO) is a well-known cytoprotective multifunctional hormone. Thus, the aim of this study was to evaluate the protective effects of EPO on microvascular injury in a murine model of endotoxemic AKI. Male Balb/c mice were divided into four groups: control, LPS (8 mg/kg, ip.), EPO (3000 IU / kg, sc.) and LPS + EPO. A time course study (0-48 h) was designed. Experiments include, among others, immunohistochemistry and Western blottings of hypoxia-inducible transcription factor (HIF-1α), erythropoietin receptor (EPO-R), vascular endothelial growth factor system (VEGF/VEGFR-2), platelet and endothelial adhesion molecule-1 (PeCAM-1), inducible nitric oxide synthase (iNOS) and phosphorylated nuclear factor kappa B p65 (NF-κB). Data showed that EPO attenuates renal microvascular damage during septic-AKI progression through a) the decrease of HIF-1 alpha, iNOS, and NF-κB and b) the enhancement of EPO-R, PeCAM-1, VEGF, and VEGFR-2 expression. In summary, EPO renoprotection involves the attenuation of septic-induced renal hypoxia and inflammation as well as ameliorates the endotoxemic microvascular injury.
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Affiliation(s)
- Tania Romina Stoyanoff
- Laboratory of Biochemical Investigations (LIBIM), School of Medicine, National Northeastern University (UNNE), IQUIBA-NEA CONICET, Corrientes, Argentina
| | - Juan Pablo Rodríguez
- Laboratory of Biochemical Investigations (LIBIM), School of Medicine, National Northeastern University (UNNE), IQUIBA-NEA CONICET, Corrientes, Argentina
| | - Juan Santiago Todaro
- Laboratory of Biochemical Investigations (LIBIM), School of Medicine, National Northeastern University (UNNE), IQUIBA-NEA CONICET, Corrientes, Argentina
| | - Juan Pablo Melana Colavita
- Laboratory of Biochemical Investigations (LIBIM), School of Medicine, National Northeastern University (UNNE), IQUIBA-NEA CONICET, Corrientes, Argentina
| | - Adriana Mónica Torres
- Pharmacology, Faculty of Biochemical and Pharmaceutical Sciences, National University of Rosario (UNR), CONICET, Rosario, Argentina
| | - María Victoria Aguirre
- Laboratory of Biochemical Investigations (LIBIM), School of Medicine, National Northeastern University (UNNE), IQUIBA-NEA CONICET, Corrientes, Argentina.
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