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Wu W, Zhong W, Lin Z, Yan J. Blockade of Indoleamine 2,3-Dioxygenase attenuates lipopolysaccharide-induced kidney injury by inhibiting TLR4/NF-κB signaling. Clin Exp Nephrol 2023; 27:495-505. [PMID: 36922478 DOI: 10.1007/s10157-023-02332-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 02/16/2023] [Indexed: 03/17/2023]
Abstract
Blockade of indoleamine 2,3-dioxygenase (IDO) has been shown to alleviate lipopolysaccharide (LPS)-induced endotoxic shock and reduce sepsis mortality, but its effect on LPS-induced kidney damage has not been reported. Herein, we established a mouse kidney injury model by intraperitoneal injection of 10 mg/kg LPS and established an in vitro renal tubular epithelial cell injury model by stimulating TCMK-1 cells with 10 mg/L LPS. We found that pretreatment with 1-methyl tryptophan (1-MT), an IDO inhibitor, significantly improved LPS-induced mouse survival, and IDO knockout (KO) mice also had higher survival rates after LPS exposure than wild-type mice. At the same time, IDO KO or pretreatment with 1-MT not only reduced serum creatinine, blood urea nitrogen, renal tubular injury pathological score, but also inflammatory factors and oxidative stress status in serum or kidney of LPS-exposed mice. In vitro, blockade of IDO with 1-MT significantly inhibited LPS-induced apoptosis, inflammation and oxidative stress in TCMK-1 cells. In addition, blockade of IDO significantly inhibited LPS-activated TLR4/NF-κB signaling pathway in kidney of mice or in TCMK-1 cells. In conclusion, our results suggested that blockade of IDO attenuated kidney inflammation, apoptosis and oxidative stress to protect against LPS-induced septic kidney injury via inhibiting the TLR4/NF-κB signaling pathway.
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Affiliation(s)
- Weiguang Wu
- Department of Emergency, Dongguan Binhaiwan Central Hospital, Dongguan City, China
| | - Weixiong Zhong
- Department of Critical Medicine, Shenzhen Luohu District People's Hospital, Shenzhen City, China
| | - Zijing Lin
- Department of Emergency, Dongguan Binhaiwan Central Hospital, Dongguan City, China
| | - Jianhui Yan
- Department of Emergency, Dongguan Binhaiwan Central Hospital, Dongguan City, China.
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2
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Li C, Wang W, Xie SS, Ma WX, Fan QW, Chen Y, He Y, Wang JN, Yang Q, Li HD, Jin J, Liu MM, Meng XM, Wen JG. The Programmed Cell Death of Macrophages, Endothelial Cells, and Tubular Epithelial Cells in Sepsis-AKI. Front Med (Lausanne) 2021; 8:796724. [PMID: 34926535 PMCID: PMC8674574 DOI: 10.3389/fmed.2021.796724] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 11/09/2021] [Indexed: 12/12/2022] Open
Abstract
Sepsis is a systemic inflammatory response syndrome caused by infection, following with acute injury to multiple organs. Sepsis-induced acute kidney injury (AKI) is currently recognized as one of the most severe complications related to sepsis. The pathophysiology of sepsis-AKI involves multiple cell types, including macrophages, vascular endothelial cells (ECs) and renal tubular epithelial cells (TECs), etc. More significantly, programmed cell death including apoptosis, necroptosis and pyroptosis could be triggered by sepsis in these types of cells, which enhances AKI progress. Moreover, the cross-talk and connections between these cells and cell death are critical for better understanding the pathophysiological basis of sepsis-AKI. Mitochondria dysfunction and oxidative stress are traditionally considered as the leading triggers of programmed cell death. Recent findings also highlight that autophagy, mitochondria quality control and epigenetic modification, which interact with programmed cell death, participate in the damage process in sepsis-AKI. The insightful understanding of the programmed cell death in sepsis-AKI could facilitate the development of effective treatment, as well as preventive methods.
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Affiliation(s)
- Chao Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Wei Wang
- Anhui Province Key Laboratory of Genitourinary Diseases, Department of Urology and Institute of Urology, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Shuai-Shuai Xie
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Wen-Xian Ma
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Qian-Wen Fan
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Ying Chen
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Yuan He
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Jia-Nan Wang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Qin Yang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Hai-di Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Juan Jin
- Key Laboratory of Anti-inflammatory and Immunopharmacology (Ministry of Education), Department of Pharmacology, Anhui Medical University, Hefei, China
| | - Ming-Ming Liu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Xiao-Ming Meng
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Jia-Gen Wen
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-Inflammatory of Immune Medicines (Ministry of Education), Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
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3
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Chen SN, Tan Y, Xiao XC, Li Q, Wu Q, Peng YY, Ren J, Dong ML. Deletion of TLR4 attenuates lipopolysaccharide-induced acute liver injury by inhibiting inflammation and apoptosis. Acta Pharmacol Sin 2021; 42:1610-1619. [PMID: 33495514 PMCID: PMC8463538 DOI: 10.1038/s41401-020-00597-x] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 12/13/2020] [Indexed: 02/07/2023] Open
Abstract
Septic acute liver injury is one of the leading causes of fatalities in patients with sepsis. Toll-like receptor 4 (TLR4) plays a vital role in response to lipopolysaccharide (LPS) challenge, but the mechanisms underlying TLR4 function in septic injury remains unclear. In this study, we investigated the role of TLR4 in LPS-induced acute liver injury (ALI) in mice with a focus on inflammation and apoptosis. Wild-type (WT) and TLR4-knockout (TLR4-/-) mice were challenged with LPS (4 mg/kg) for 6 h. TLR4 signaling cascade markers (TLR4, MyD88, and NF-κB), inflammatory markers (TNFα, IL-1β, and IL-6), and apoptotic markers (Bax, Bcl-2, and caspase 3) were evaluated. We showed that LPS challenge markedly increased the levels of serum alanine aminotransferase (ALT)/aspartate aminotransferase (AST) and other liver pathological changes in WT mice. In addition, LPS challenge elevated the levels of liver carbonyl proteins and serum inflammatory cytokines, upregulated the expression of TLR4, MyD88, and phosphorylated NF-κB in liver tissues. Moreover, LPS challenge significantly increased hepatocyte apoptosis, caspase 3 activity, and Bax level while suppressing Bcl-2 expression in liver tissues. These pathological changes were greatly attenuated in TLR4-/- mice. Similar pathological responses were provoked in primary hepatic Kupffer cells isolated from WT and TLR4-/- mice following LPS (1 μg/mL, 6 h) challenge. In summary, these results demonstrate that silencing of TLR4 attenuates LPS-induced liver injury through inhibition of inflammation and apoptosis via TLR4/MyD88/NF-κB signaling pathway. TLR4 deletion confers hepatoprotection against ALI induced by LPS, possibly by repressing macrophage inflammation and apoptosis.
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Affiliation(s)
- Sai-Nan Chen
- Department of Critical Care Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, 510282, China
- Department of Emergency Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Ying Tan
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xiao-Chan Xiao
- Department of Emergency Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Qian Li
- Department of Emergency Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Qi Wu
- Department of Burns, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - You-You Peng
- Shanghai Hongrun Boyuan School, Shanghai, 201713, China
| | - Jun Ren
- Department of Cardiology, and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, Shanghai, 200032, China.
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, 98195, USA.
| | - Mao-Long Dong
- Department of Burns, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
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Yu Q, Zou L, Yuan X, Fang F, Xu F. Dexmedetomidine Protects Against Septic Liver Injury by Enhancing Autophagy Through Activation of the AMPK/SIRT1 Signaling Pathway. Front Pharmacol 2021; 12:658677. [PMID: 33981237 PMCID: PMC8109052 DOI: 10.3389/fphar.2021.658677] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 04/12/2021] [Indexed: 12/14/2022] Open
Abstract
Background: Liver injury is one of the serious complications of sepsis. Previous studies suggested that dexmedetomidine (DEX) could alleviate cecal ligation and puncture (CLP)-induced liver injury. However, it is unclear whether the protective effect of DEX on sepsis-induced liver injury is related to autophagy. Methods: Mice (n = 105) were randomly divided into the following groups: (i) CON group (Sham); (ii) CLP group (CLP-induced liver injury + saline); (iii) CLP + DEX group (CLP-induced liver injury + DEX). Mouse models of sepsis-induced liver injury were established using CLP. DEX or normal saline was administered by intraperitoneal injection at 0, 2, and 4 h after CLP surgery. The mortality rate within 120 h was calculated. The levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and inflammatory cytokines were measured at 6, 12, and 24 h in each group. Hematoxylin and eosin staining assay was carried out to detect the morphological changes of mouse liver cells in each group. The levels of autophagy-associated proteins LC3II, Beclin-1, p62, and LAMP-2 were detected in three groups of mice using western blotting. The expression of LC3II was detected using immunofluorescence. Transmission electron microscopy (TEM) of liver tissue was used to observe autophagosomes and autophagosome–lysosomes. Lastly, the effect of DEX on the AMPK/SIRT1 pathway-associated protein levels were detected using western blotting. Meanwhile, we used L0-2 cells infected with mRFP-GFP-LC3 adenovirus to further analyze the role of SIRT1 in DEX-induced autophagy in liver injury model in vitro. Results: DEX significantly improved the survival rate of septic mice at the early stage and ameliorated the pathology of sepsis-induced liver injury. The level of autophagy-associated proteins, phosphorylated (p)-AMPK/AMPK, and SIRT1 in the liver of CLP-induced sepsis mice peaked at 12 h post-CLP and decreased significantly at 24 h. In the CLP + DEX group, the levels of autophagy-associated proteins, p-AMPK/AMPK, and SIRT1 increased, whereas inflammatory cytokines decreased at 24 h. The autophagosome structure was clearly observed at different time points in the CLP + DEX group. In the in vitro hepatocyte injury model, the SIRT1 inhibitor significantly increased intracellular ROS levels and reversed the effect of DEX on autophagy flux. Conclusion: We demonstrated a novel mechanism in which DEX protects against CLP-induced liver injury. DEX enhances autophagy, which alleviates the inflammatory responses in CLP-induced liver injury by regulating the SIRT1/AMPK pathway.
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Affiliation(s)
- Qing Yu
- Department of Intensive Care Unit, Children's Hospital of Chongqing Medical University, Chongqing, China.,Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Liying Zou
- Department of Intensive Care Unit, Children's Hospital of Chongqing Medical University, Chongqing, China.,Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Xiu Yuan
- Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Fang Fang
- Department of Intensive Care Unit, Children's Hospital of Chongqing Medical University, Chongqing, China.,Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Feng Xu
- Department of Intensive Care Unit, Children's Hospital of Chongqing Medical University, Chongqing, China
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Wang R, Wang N, Han Y, Xu J, Xu Z. Dulaglutide Alleviates LPS-Induced Injury in Cardiomyocytes. ACS OMEGA 2021; 6:8271-8278. [PMID: 33817486 PMCID: PMC8015136 DOI: 10.1021/acsomega.0c06326] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 03/03/2021] [Indexed: 05/13/2023]
Abstract
BACKGROUND AND PURPOSE Sepsis is a severe infection-induced disease with multiple organ failure, and sepsis-induced cardiomyopathy is a fatal condition. Inflammatory response and oxidative stress are reported to be involved in the development of sepsis-induced cardiomyopathy. Dulaglutide is a novel antidiabetic agent that is currently reported to exert an anti-inflammatory effect. The present study aims to explore the potential protective property of dulaglutide on lipopolysaccharide (LPS)-induced injury on cardiomyocytes. METHODS LPS was used to induce an in vitro injury model on cardiomyocytes. The mitochondrial reactive oxygen species (ROS) level was detected using MitoSOX red, and reduced glutathione (GSH) was measured to evaluate the status of oxidative stress in H9c2 myocardial cells. The expressions of NADPH oxidase-1 (NOX-1) and inducible nitric oxidesynthase (iNOS) were determined using real-time PCR and western blot analysis. Real-time PCR and enzyme-linked immunosorbent assay (ELISA) were both used to detect the expressions and concentrations of tumor necrosis factor-α, interleukin-1β, interleukin-17, matrix metalloproteinase-2, and matrix metalloproteinase-9 in H9c2 myocardial cells, respectively. The production of nitric oxide (NO) was measured using the Griess reagent. The levels of creatine kinase isoenzyme-MB (CK-MB) and cardiac troponin I (cTnI) were detected using ELISA. Western blot was utilized to determine the expressions of toll-like receptor 4 (TLR4), myeloid differentiation factor 88 (MyD88), and p-NF-κB p65 in H9c2 myocardial cells in the nucleus. RESULTS First, dulaglutide ameliorated LPS-induced oxidative stress by suppressing the production of mitochondrial ROS and elevating the level of reduced GSH, as well as downregulating NOX-1. Second, the LPS-induced cardiomyocyte injury was alleviated by dulaglutide through downregulating CK-MB and cTnI, accompanied by inhibiting iNOS expression and NO production. Lastly, the production of inflammatory factors and upregulation of MMPs induced by LPS were both significantly reversed by dulaglutide through suppressing the TLR4/Myd88/NF-κB signaling pathway. CONCLUSIONS Dulaglutide alleviated LPS-induced injury in cardiomyocytes by inhibiting inflammation and oxidative stress.
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Affiliation(s)
- Rijun Wang
- Department of Cardiology, Cangzhou Central Hospital Affiliated of Tianjin Medical
University, Cangzhou, Hebei 061014, China
- Department of Cardiology, Shanxi Cardiovascular
Hospital, Taiyuan, Shanxi 030024, China
| | - Ning Wang
- Department of Cardiology, Shanxi Cardiovascular
Hospital, Taiyuan, Shanxi 030024, China
| | - Yuping Han
- Department of Cornea, Shanxi Ophthalmic
Hospital, Taiyuan, Shanxi 030002, China
| | - Jiyao Xu
- Department of Cardiology, Shanxi Cardiovascular
Hospital, Taiyuan, Shanxi 030024, China
| | - Zesheng Xu
- Department of Cardiology, Cangzhou Central Hospital Affiliated of Tianjin Medical
University, Cangzhou, Hebei 061014, China
- . Phone/Fax: +86-0317-2075013
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Zhu Y, Xu D, Deng F, Yan Y, Li J, Zhang C, Chu J. Angiotensin (1-7) Attenuates Sepsis-Induced Acute Kidney Injury by Regulating the NF-κB Pathway. Front Pharmacol 2021; 12:601909. [PMID: 33746749 PMCID: PMC7970314 DOI: 10.3389/fphar.2021.601909] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 01/12/2021] [Indexed: 11/17/2022] Open
Abstract
This study explores the protective mechanism of angiotensin (1-7) [Ang-(1-7)] on kidneys by examining its effects on renal histomorphology, inflammatory response, oxidative stress, and NF-κB signaling in mice suffering from sepsis-induced acute kidney injury. A sepsis-induced acute kidney injury mouse model was established by intracervically injecting lipopolysaccharides (LPS group), followed by the administration of Ang-(1-7) [LPS + Ang-(1-7) group]. The serum levels of urea nitrogen, creatinine and cystatin. c were measured with an automatic biochemical analyzer, and changes in proinflammatory cytokines and angiotensin II (Ang II) in the serum and kidneys were quantified by enzyme-linked immunosorbent assays. Changes in oxidative stress indices in the renal cortex were detected by colorimetry. The localization of Ang II in kidneys was examined by immunohistochemistry. Western blotting was used to examine phosphorylated NF-κB-p65 and IκBα levels in kidneys. Compared with the control group, the serum levels of urea nitrogen, creatinine and cystatin. c were increased, whereas the levels of Ang II, TNFα, IL-1β, IL-6, and malondialdehyde (mda) were increased significantly. The levels of Ang II and phosphorylated NF-κB-p65 were elevated in kidneys, whereas the levels of superoxide dismutase (sod), Total antioxidative capacity (TAOC), and inhibitor of NF-κB (IκBα) were reduced in the LPS group (p < 0.05). Pathological damage was also observed in kidneys of LPS-group mice. In Pearson correlation analysis, there was a positive correlation between Ang II and phosphorylated NF-κB-p65 levels, and a negative correlation between Ang II and IκBα levels (p < 0.05). After the application of Ang-(1-7), the levels of urea nitrogen, creatinine, cystatin. c, Ang II, TNFα, IL-1β, IL-6, and mda, as well as the expression of Ang II and phosphorylated NF-κB-p65 in kidneys of LPS + Ang-(1-7)-group mice, were lower than those in kidneys of LPS-group mice, but the levels of sod, TAOC, and IκBα were higher than those of LPS-group mice (p < 0.05). Pathological changes were less severe in mice of the LPS + Ang-(1-7) group. Overall, Ang-(1-7) can decrease the Ang II level, inhibit NF-κB signaling, reduce the inflammatory response, decrease oxidative stress, and mitigate sepsis-associated acute kidney injury.
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Affiliation(s)
- Ying Zhu
- Department of Nephrology, Anhui Provincial Children's Hospital, Hefei, China
| | - Daliang Xu
- Department of Nephrology, Anhui Provincial Children's Hospital, Hefei, China
| | - Fang Deng
- Department of Nephrology, Anhui Provincial Children's Hospital, Hefei, China
| | - Yonglin Yan
- Department of Nephrology, Anhui Provincial Children's Hospital, Hefei, China
| | - Jian Li
- Department of Nephrology, Anhui Provincial Children's Hospital, Hefei, China
| | - Chenyu Zhang
- Department of Clinical Laboratory, Anhui Provincial Children's Hospital, Hefei, China
| | - Jing Chu
- Department of Pathology, Anhui Provincial Children's Hospital, Hefei, China
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Cordyceps cicadae Mycelia Ameliorate Cisplatin-Induced Acute Kidney Injury by Suppressing the TLR4/NF- κB/MAPK and Activating the HO-1/Nrf2 and Sirt-1/AMPK Pathways in Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:7912763. [PMID: 32089779 PMCID: PMC7026739 DOI: 10.1155/2020/7912763] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 12/20/2019] [Accepted: 01/11/2020] [Indexed: 12/14/2022]
Abstract
Acute kidney injury (AKI) is a common clinical problem, characterized by a sudden loss of renal function, a high risk of death, and the eventual development of renal fibrosis and renal failure. Cordyceps cicadae is a traditional Chinese medicine with the potential function of kidney protection. We analyze two sputum extracts, a water extract (WCC), and an ethanol extract (ECC), to assess the potential of treating AKI in an animal model of kidney injury induced by cisplatin. A nephrotoxic mouse model was first established by intraperitoneal injection of cisplatin. Subsequently, WCC and ECC were orally administered in these mice. The results show that WCC and ECC significantly alleviated cisplatin-induced AKI renal histological changes, serum creatinine (CRE) and blood urea nitrogen (BUN) production, and the levels of NO, TNF-α, IL-1β, and IL-6. The levels of malondialdehyde (MDA) and glutathione (GSH) were suppressed by administration of WCC and ECC. However, WCC treatment prevented these changes significantly better than ECC treatment. In addition, Western blot data showed that WCC attenuated the cisplatin-induced protein expression of cyclooxygenase-2 (COX-2) and inducible NO synthase (iNOS), as well as inhibiting nuclear factor-kappa B (NF-κB) and mitogen-activated protein kinase (MAPK) activation in the kidney tissues. Furthermore, WCC greatly inhibited the expression of Toll-like receptor 4 (TLR4) and cisplatin-induced NF-κB activation, as well as dramatically increasing the production of antioxidative enzymes (i.e., superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase, nuclear factor erythroid 2-related factor 2 (Nrf2), and heme oxygenase 1 (HO-1)), silent information regulator T1 (Sirt1), and p-AMP-activated protein kinase (AMPK) in the kidney tissues. In addition, we found that WCC increased the expression levels of the autophagy-related proteins LC3B and Beclin-1; proapoptotic proteins, including cleaved caspase-3 and cleaved poly (ADP-ribose) polymerase (PARP) 1; and organic anion transporters 1 (OAT1) and 3 (OAT3) in the kidney tissues. Finally, WCC, ECC, and two bioactive compounds-adenosine and N6-(2-hydroxyethyl) adenosine (HEA)-inhibited the production of nitrite oxide (NO) and intracellular reactive oxygen species (ROS) triggered by lipopolysaccharide- (LPS-) stimulated RAW264.7 macrophages in vitro. Collectively, WCC could provide a potential therapeutic candidate for the prevention of cisplatin-induced kidney injury through the inhibition of oxidative stress and inflammation.
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8
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Guo H, Tang L, Xu J, Lin C, Ling X, Lu C, Liu Z. MicroRNA-495 serves as a diagnostic biomarker in patients with sepsis and regulates sepsis-induced inflammation and cardiac dysfunction. Eur J Med Res 2019; 24:37. [PMID: 31771650 PMCID: PMC6878688 DOI: 10.1186/s40001-019-0396-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 11/11/2019] [Indexed: 02/06/2023] Open
Abstract
Background Sepsis leads to severe inflammatory and cardiac dysfunction. This study aimed to explore the clinical value of miR-495 in sepsis, as well as its role in sepsis-induced inflammation and cardiac dysfunction. Methods 105 sepsis patients were recruited; receiver operating characteristic (ROC) curve was plotted to assess the diagnostic value of miR-495 in sepsis. A model of sepsis in rats was created via performing cecal ligation and puncture (CLP). After modeling, the cardiac function, including left ventricular systolic pressure (LVSP), left ventricular end diastolic pressure (LVEDP) and maximum rate of rise/fall of left ventricle pressure (± dp/dtmax), and serum cardiac troponin I (CTn-I), creative kinase isoenzyme MB (CK-MB) were detected. The blood cytokines levels including TNF-α, IL-6, IL-1β were also measured. Quantitative real-time PCR (qRT-PCR) was used for the measurement of the expression level of miR-495. Results MiR-495 was significantly downregulated in sepsis patients, especially patients who suffered from septic shock (SS). MiR-495 expression was negatively associated with Scr, WBC, CRP, PCT, APACHE II score and SOFA score. MiR-495 could distinguish patients with SS from non-SS patients. MiR-495 and SOFA score were better indictors for the occurrence of cardiac dysfunction in sepsis patients. In CLP-induced sepsis model. CLP rats experienced deterioration of LVSP, LVEDP, ± dp/dtmax, and had a rise in serum CTn-I, CK-MB, TNF-α, IL-6 and IL-1β, which were improved by miR-495 agomir injection. Conclusions MiR-495 might be a potential diagnostic biomarker for sepsis patients, and overexpression of miR-495 alleviated sepsis-induced inflammation and cardiac dysfunction.
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Affiliation(s)
- Hailei Guo
- Department of Burns Surgery, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Wenzhou, 325000, Zhejiang, People's Republic of China.,Department of Burns Surgery, Jinan Central Hospital Affiliated to Shandong University, Jinan, 250013, People's Republic of China
| | - Liying Tang
- Department of Rehabilitation, Wenzhou Hospital of Traditional Chinese Medicine Affiliated to Zhejiang, Chinese Medical University, Wenzhou, 32500, People's Republic of China
| | - Jianjun Xu
- Department of Burns Surgery, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Cai Lin
- Department of Burns Surgery, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Xiangwei Ling
- Department of Burns Surgery, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Caijiao Lu
- Department of Burns Surgery, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Wenzhou, 325000, Zhejiang, People's Republic of China.
| | - Zhengjun Liu
- Department of Burns Surgery, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Wenzhou, 325000, Zhejiang, People's Republic of China.
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9
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Yue L, Yan M, Tremblay ML, Lin TJ, Li H, Yang T, Song X, Xie T, Xie Z. PTP1B negatively regulates nitric oxide-mediated Pseudomonas aeruginosa killing by neutrophils. PLoS One 2019; 14:e0222753. [PMID: 31532798 PMCID: PMC6750887 DOI: 10.1371/journal.pone.0222753] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 09/07/2019] [Indexed: 01/06/2023] Open
Abstract
Neutrophils play a critical role in host defense against Pseudomonas aeruginosa infection. Mechanisms underlying the negative regulation of neutrophil function in bacterial clearance remain incompletely defined. Here, we demonstrate that protein tyrosine phosphatase-1B (PTP1B) is a negative regulator of P. aeruginosa clearance by neutrophils. PTP1B-deficient neutrophils display greatly enhanced bacterial phagocytosis and killing, which are accompanied by increased Toll-like receptor 4 (TLR4) signaling activation and nitric oxide (NO) production following P. aeruginosa infection. Interestingly, PTP1B deficiency mainly upregulates the production of IL-6 and IFN-β, leads to enhanced TLR4-dependent STAT1 activation and iNOS expression by neutrophils following P. aeruginosa infection. Further studies reveal that PTP1B and STAT1 are physically associated. These findings demonstrate a negative regulatory mechanism in neutrophil underlying the elimination of P. aeruginosa infection though a PTP1B-STAT1 interaction.
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Affiliation(s)
- Lei Yue
- The Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, China
| | - Min Yan
- Department of Microbiology and Immunology, Kunming Medical University, Kunming, Yunnan, China
| | - Michel L. Tremblay
- Rosalind and Morris Goodman Cancer Research Centre, Department of Biochemistry, McGill University, Montréal, Quebec, Canada
| | - Tong-Jun Lin
- Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Hua Li
- The Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, China
| | - Ting Yang
- The Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, China
| | - Xia Song
- The Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, China
| | - Tianhong Xie
- The Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, China
| | - Zhongping Xie
- The Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, China
- * E-mail:
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