1
|
Hu W, Zhao J, Hu Y, Song S, Chen X, Sun Y. Huangqi Jiuni decoction prevents acute kidney injury induced by severe burns by inhibiting activation of the TNF/NF-κB pathway. JOURNAL OF ETHNOPHARMACOLOGY 2024; 320:117344. [PMID: 37949330 DOI: 10.1016/j.jep.2023.117344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/15/2023] [Accepted: 10/22/2023] [Indexed: 11/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Huangqi Jiuni decoction (HQJND) is a prescription for the treatment of severe burns provided based on traditional Chinese and Western medicine, which is created by the First Affiliated Hospital of Anhui Medical University. It consists of 12 herbs and has been used clinically for decades. It has greatly shortened the course of the disease, but the mechanism by which HQJND treats the disease still remains unclear. AIM OF THE STUDY Hence, the objective of this investigation was to utilize modern pharmacological tools to demonstrate the efficacy and mechanism of HQJND in the treatment of acute kidney injury (AKI) caused by severe burns. MATERIALS AND METHODS In this study, the chemical constituents in HQJND were first examined using liquid chromatography tandem mass spectrometry (LC-MS/MS). Then, by using network pharmacology, we screened the targets of drug and disease action, and predicted the signaling pathways acting in the course of drug treatment of disease. Finally, we attempted to verify the efficacy of the drug and explored its therapeutic mechanism after the establishment of an animal model, herbal gavage treatment, collection of rat kidneys and serum for renal function, quantitative real-time Polymerase Chain Reaction (RT-qPCR), Western Blotting (WB), Hematoxylin and eosin (HE) staining and Immunohistochemistry (IHC). RESULTS The 14 important active ingredients in HQJND was analyzed by liquid chromatography tandem mass spectrometry, while network pharmacology screening was performed to identify 353 disease-associated marker genes and 286 drug targets, finally identifying the TNF/NF-κB (tumor necrosis factor/nuclear factor kappa-B) signaling site: the key pathway of burn-induced acute kidney injury when HQJND intervened. The serum renal function and histopathology of rats demonstrated that the use of HQJND significantly improved the renal function in severe burns. RT-qPCR and WB confirmed that the TNF/NF-κB signaling pathway was activated in the Model group of rats, and HQJND could curb the signaling pathway because it moderated the expressions of key proteins in the process. CONCLUSION Based on modern pharmacology, we explored an effective herbal preparation to ameliorate the impairment of renal function after severe burns, which is most likely to function through the TNF/NF-κB signaling pathway.
Collapse
Affiliation(s)
- Wanxuan Hu
- Department of Burn, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230022, PR China
| | - Jie Zhao
- Department of Chinese Medicine, The First Affiliated Hospital of Anhui Medical University, No.218, Jixi Road, Shushan District, Hefei, Anhui, 230032, PR China; Department of Chinese Integrative Medicine, Anhui Medical University, No. 80, Meishan Road, Shushan District, Hefei, Anhui, 230032, PR China
| | - Yuxin Hu
- Department of Chinese Integrative Medicine, Anhui Medical University, No. 80, Meishan Road, Shushan District, Hefei, Anhui, 230032, PR China
| | - Shuai Song
- Department of Pharmacy, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, PR China
| | - Xulin Chen
- Department of Burn, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230022, PR China
| | - Yexiang Sun
- Department of Burn, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230022, PR China.
| |
Collapse
|
2
|
Xue C, Zhang X, Ge H, Tang Q, Jeon J, Zhao F, Wang Y, Zhu MX, Cao Z. Total flavone of flowers of Abelmoschus manihot (L.) Medic inhibits the expression of adhesion molecules in primary mesenteric arterial endothelial cells and ameliorates dextran sodium sulphate-induced ulcerative colitis in mice. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 112:154713. [PMID: 36857970 DOI: 10.1016/j.phymed.2023.154713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 02/02/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Flowers of Abelmoschus manihot (L.) medic (AM) is a traditional Chinese medicine used to treat chronic nephritis, nephrotic syndrome, diabetic nephropathy, and colonic inflammation. PURPOSE This study aimed to explore the influence of the total flavone of AM flowers (TFA) on acute ulcerative colitis (UC) and the potential underlying mechanism. METHODS Efficacy of TFA (30, 60, 120 mg/kg) on UC was evaluated in a dextran sodium sulphate (DSS)-induced colonic inflammatory mouse model by analyzing disease activity index (DAI), histopathological score, colon length, and cytokine expression. Expression levels of critical adhesion molecules and nuclear factor kappa B (NF-κB) were examined by qRT-PCR, Western blotting, or immunofluorescence labeling. Myeloperoxidase activity was examined using ELISA. In vitro THP-1 adhesion assay was used to evaluate monocyte adhesion. RESULTS TFA significantly reduced DAI score, prevented colon shortening, and ameliorated histological injuries of colons in DSS-treated mice. TFA inhibited the expression of cytokines (IL-1β and TNF-α) and adhesion molecules (ICAM-1, VCAM-1, and MAdCAM-1) in colon tissues of DSS mice. In vitro studies on mesenteric arterial endothelial cells (MAECs) showed that TFA attenuated TNF-α-induced upregulation of ICAM-1, VCAM-1, and MAdCAM-1, as well as THP-1 cell adhesion to MAECs. TFA also suppressed the phosphorylation and nuclear translocation of NF-κB in MAECs. CONCLUSION TFA efficaciously ameliorates UC possibly by inhibiting monocyte adhesion through blocking TNF-α-induced NF-κB activation, which in turn suppresses the upregulation of adhesive molecules in colon endothelial cells. Inhibiting the expression of adhesion molecule in MAECs may represent a useful strategy for therapeutic development to treat UC, with TFA being a safe and efficacious therapeutic agent.
Collapse
Affiliation(s)
- Chu Xue
- State Key Laboratory of Natural Medicines and Jiangsu Provincial Key Laboratory for TCM Evaluation and Translational Development, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu 211198, China
| | - Xian Zhang
- State Key Laboratory of Natural Medicines and Jiangsu Provincial Key Laboratory for TCM Evaluation and Translational Development, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu 211198, China
| | - Haitao Ge
- Research Institute of Huanghui, Jiangsu Suzhong Pharmaceutical Group Co., Ltd., Nanjing, Jiangsu, China
| | - Qinglian Tang
- State Key Laboratory of Natural Medicines and Jiangsu Provincial Key Laboratory for TCM Evaluation and Translational Development, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu 211198, China
| | - Jaepyo Jeon
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Fang Zhao
- State Key Laboratory of Natural Medicines and Jiangsu Provincial Key Laboratory for TCM Evaluation and Translational Development, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu 211198, China
| | - Yujing Wang
- State Key Laboratory of Natural Medicines and Jiangsu Provincial Key Laboratory for TCM Evaluation and Translational Development, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu 211198, China
| | - Michael X Zhu
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
| | - Zhengyu Cao
- State Key Laboratory of Natural Medicines and Jiangsu Provincial Key Laboratory for TCM Evaluation and Translational Development, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu 211198, China.
| |
Collapse
|
3
|
Santana AC, Andraus W, Silva FMO, Sala ACG, Schust AS, Neri LHM, Feliciano R, Pepineli R, Dellê H, Ruiz LM, de Oliveira-Braga KA, Nepomuceno NA, Pêgo-Fernandes PM, Dos Santos MJ, de Moraes EL, Brasil S, Figueiredo EG. Thalidomide modulates renal inflammation induced by brain death experimental model. Transpl Immunol 2022; 75:101710. [PMID: 36096418 DOI: 10.1016/j.trim.2022.101710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 09/06/2022] [Accepted: 09/06/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND Brain death (BD) is characterized by a complex inflammatory response, resulting in dysfunction of potentially transplantable organs. This process is modulated by cytokines, which amplify graft immunogenicity. We have investigated the inflammatory response in an animal model of BD and analyzed the effects of thalidomide, a drug with powerful immunomodulatory properties. METHODS BD was induced in male Lewis rats. We studied three groups: Control (sham-operated rats) (n = 6), BD (rats subjected to brain death) (n = 6) and BD + Thalid (BD rats treated with one dose of thalidomide (200 mg/Kg), administered by gavage) (n = 6). Six hours after BD, serum levels of urea and creatinine, as well as systemic and renal tissue protein levels of TNF-α and IL-6, were analyzed. We also determined the mRNA expression of ET-1, and macrophage infiltration by immunohistochemistry. RESULTS BD induced a striking inflammatory status, demonstrated by a significant increase of plasma cytokines: TNF-α (2.8 ± 4.3 pg/mL [BD] vs. 9.4 ± 2.8 pg/mL [Control]), and IL-6 (6219.5 ± 1380.6 pg/mL [BD] vs. 1854.7 ± 822.6 pg/mL [Control]), and in the renal tissue: TNF-α (2.5 ± 0.3 relative expression [BD] vs. 1.0 ± 0.4 relative expression [Control]; p < 0.05), and IL-6 (4.0 ± 0.4 relative expression [BD] vs. 1.0 ± 0.3 relative expression [Control]; p < 0.05). Moreover, BD increased macrophages infiltration (2.47 ± 0.07 cells/field [BD] vs. 1.20 ± 0.05 cells/field [Control]; p < 0.05), and ET-1 gene expression (2.5 ± 0.3 relative expression [BD] vs. 1.0 ± 0.2 relative expression [Control]; p < 0.05). In addition, we have observed deterioration in renal function, characterized by an increase of urea (194.7 ± 25.0 mg/dL [BD] vs. 108.0 ± 14.2 mg/dL [Control]; p < 0.05) and creatinine (1.4 ± 0.04 mg/dL [BD] vs. 1.0 ± 0.07 mg/dL [Control]; p < 0.05) levels. Thalidomide administration significantly reduced plasma cytokines: TNF-α (5.1 ± 1.4 pg/mL [BD + Thalid] vs. BD; p < 0.05), and IL-6 (1056.5 ± 488.3 pg/mL [BD + Thalid] vs. BD; p < 0.05), as well as in the renal tissue: TNF-α (1.5 ± 0.2 relative expression [BD + Thalid] vs. BD; p < 0.05), and IL-6 (2.1 ± 0.3 relative expression [BD + Thalid] vs. BD; p < 0.05). Thalidomide treatment also induced a significant decrease in the expression of ET-1 (1.4 ± 0.3 relative expression [BD + Thalid] vs. BD; p < 0.05), and macrophages infiltration (1.17 ± 0.06 cells/field [BD + Thalid] vs. BD; p < 0.05). Also thalidomide prevented kidney function failure by reduced urea (148.3 ± 4.4 mg/dL [BD + Thalid] vs. BD; p < 0.05), and creatinine (1.1 ± 0.14 mg/dL [BD + Thalid] vs. BD; p < 0.05). CONCLUSIONS The immunomodulatory properties of thalidomide were effective in decreasing systemic and local immunologic response, leading to diminished renal damage, as reflected in the decrease of urea and creatinine levels. These results suggest that use of thalidomide may represent a potential strategy for treating in BD kidney organ donors.
Collapse
Affiliation(s)
- Alexandre Chagas Santana
- Neurological Surgery Department, University of São Paulo, School of Medicine, São Paulo, Brazil; Organ Procurement Organization, Hospital das Clínicas, University of São Paulo, School of Medicine, São Paulo, Brazil.
| | - Wellington Andraus
- Gastroenterology Department, University of São Paulo, School of Medicine, São Paulo, Brazil
| | | | | | | | | | - Regiane Feliciano
- Medical Science Department, Nove de Julho University, São Paulo, Brazil
| | - Rafael Pepineli
- Medical Science Department, Nove de Julho University, São Paulo, Brazil
| | - Humberto Dellê
- Medical Science Department, Nove de Julho University, São Paulo, Brazil
| | - Liliane Moreira Ruiz
- Cardiopneumology Department, University of São Paulo, School of Medicine, São Paulo, Brazil
| | | | | | | | | | - Edvaldo Leal de Moraes
- Organ Procurement Organization, Hospital das Clínicas, University of São Paulo, School of Medicine, São Paulo, Brazil
| | - Sergio Brasil
- Neurological Surgery Department, University of São Paulo, School of Medicine, São Paulo, Brazil
| | | |
Collapse
|
4
|
Wu Z, Deng J, Zhou H, Tan W, Lin L, Yang J. Programmed Cell Death in Sepsis Associated Acute Kidney Injury. Front Med (Lausanne) 2022; 9:883028. [PMID: 35655858 PMCID: PMC9152147 DOI: 10.3389/fmed.2022.883028] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 03/21/2022] [Indexed: 01/15/2023] Open
Abstract
Sepsis-associated acute kidney injury (SA-AKI) is common in patients with severe sepsis, and has a high incidence rate and high mortality rate in ICU patients. Most patients progress to AKI before drug treatment is initiated. Early studies suggest that the main mechanism of SA-AKI is that sepsis leads to vasodilation, hypotension and shock, resulting in insufficient renal blood perfusion, finally leading to renal tubular cell ischemia and necrosis. Research results in recent years have shown that programmed cell death such as apoptosis, necroptosis, pyroptosis and autophagy play important roles. In the early stage of sepsis-related AKI, autophagy bodies form and inhibit various types of programmed cell death. With the progress of disease, programmed cell death begins. Apoptosis promoter represents caspase-8-induced apoptosis and apoptosis effector represents caspase-3-induced apoptosis, however, caspase-11 and caspase-1 regulate gasdermin D-mediated pyroptosis. Caspase-8 and receptor interacting kinase 1 bodies mediate necroptosis. This review focuses on the pathophysiological mechanisms of various programmed cell death in sepsis-related AKI.
Collapse
Affiliation(s)
- Zhifen Wu
- Department of Nephrology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Junhui Deng
- Department of Nephrology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hongwen Zhou
- Department of Nephrology, Chongqing Liangping District People's Hospital, Chongqing, China
| | - Wei Tan
- Department of Nephrology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Lirong Lin
- Department of Nephrology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jurong Yang
- Department of Nephrology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| |
Collapse
|
5
|
Wu Q, Wang J, Wang Y, Xiang L, Tan Y, Feng J, Zhang Z, Zhang L. Targeted delivery of celastrol to glomerular endothelium and podocytes for chronic kidney disease treatment. NANO RESEARCH 2021; 15:3556-3568. [PMID: 34925707 PMCID: PMC8666268 DOI: 10.1007/s12274-021-3894-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/07/2021] [Accepted: 09/17/2021] [Indexed: 06/14/2023]
Abstract
UNLABELLED The etiology of chronic kidney disease (CKD) is complex and diverse, which could be briefly categorized to glomerular- or tubular-originated. However, the final outcomes of CKD are mainly glomerular sclerosis, endothelial dysfunction and injury, and chronic inflammation. Thus, targeted delivery of drugs to the glomeruli in order to ameliorate glomerular endothelial damage may help alleviate CKD and help enrich our knowledge. The herb tripterygium wilfordii shows therapeutic effect on kidney disease, and celastrol (CLT) is one of its active ingredients but with strong toxicity. Therefore, based on the unique structure and pathological characteristics of the glomerulus, we designed a targeted delivery system named peptides coupled CLT-phospholipid lipid nanoparticles (PC-PLNs) to efficiently deliver CLT to damaged endothelial cells and podocytes in the glomerulus for CKD treatment and research. PC-PLNs could effectively inhibit inflammation, reduce endothelial damage, alleviate CKD severity, and reduce the toxicity of CLT. We also studied the mechanism of CLT in the treatment of nephropathy and found that CLT can increase the level of NO by increasing eNOS while inhibiting the expression of VCAM-1, thus provides an anti-inflammatory effect. Therefore, our study not only offered an efficient CKD drug formulation for further development, but also provided new medical knowledge about CKD. ELECTRONIC SUPPLEMENTARY MATERIAL Supplementary material (attached with all the supporting tables and figures mentioned in this work) is available in the online version of this article at 10.1007/s12274-021-3894-x.
Collapse
Affiliation(s)
- Qingsi Wu
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 China
- Med-X Center for Materials, Sichuan University, No. 14 Section 3 South Renmin Road, Jinjiang District, Chengdu, 610000 China
| | - Jiading Wang
- College of Polymer Science and Engineering, Sichuan University, No. 24, South Block 1, First Ring Road, Chengdu, 610065 China
- Med-X Center for Materials, Sichuan University, No. 14 Section 3 South Renmin Road, Jinjiang District, Chengdu, 610000 China
| | - Yuanfang Wang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 China
- Med-X Center for Materials, Sichuan University, No. 14 Section 3 South Renmin Road, Jinjiang District, Chengdu, 610000 China
| | - Ling Xiang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 China
- Med-X Center for Materials, Sichuan University, No. 14 Section 3 South Renmin Road, Jinjiang District, Chengdu, 610000 China
| | - Yulu Tan
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 China
- Med-X Center for Materials, Sichuan University, No. 14 Section 3 South Renmin Road, Jinjiang District, Chengdu, 610000 China
| | - Jiaxing Feng
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 China
- Med-X Center for Materials, Sichuan University, No. 14 Section 3 South Renmin Road, Jinjiang District, Chengdu, 610000 China
| | - Zhirong Zhang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 China
- Med-X Center for Materials, Sichuan University, No. 14 Section 3 South Renmin Road, Jinjiang District, Chengdu, 610000 China
| | - Ling Zhang
- College of Polymer Science and Engineering, Sichuan University, No. 24, South Block 1, First Ring Road, Chengdu, 610065 China
- Med-X Center for Materials, Sichuan University, No. 14 Section 3 South Renmin Road, Jinjiang District, Chengdu, 610000 China
| |
Collapse
|
6
|
Bozelli JC, Azher S, Epand RM. Plasmalogens and Chronic Inflammatory Diseases. Front Physiol 2021; 12:730829. [PMID: 34744771 PMCID: PMC8566352 DOI: 10.3389/fphys.2021.730829] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 09/14/2021] [Indexed: 11/30/2022] Open
Abstract
It is becoming widely acknowledged that lipids play key roles in cellular function, regulating a variety of biological processes. Lately, a subclass of glycerophospholipids, namely plasmalogens, has received increased attention due to their association with several degenerative and metabolic disorders as well as aging. All these pathophysiological conditions involve chronic inflammatory processes, which have been linked with decreased levels of plasmalogens. Currently, there is a lack of full understanding of the molecular mechanisms governing the association of plasmalogens with inflammation. However, it has been shown that in inflammatory processes, plasmalogens could trigger either an anti- or pro-inflammation response. While the anti-inflammatory response seems to be linked to the entire plasmalogen molecule, its pro-inflammatory response seems to be associated with plasmalogen hydrolysis, i.e., the release of arachidonic acid, which, in turn, serves as a precursor to produce pro-inflammatory lipid mediators. Moreover, as plasmalogens comprise a large fraction of the total lipids in humans, changes in their levels have been shown to change membrane properties and, therefore, signaling pathways involved in the inflammatory cascade. Restoring plasmalogen levels by use of plasmalogen replacement therapy has been shown to be a successful anti-inflammatory strategy as well as ameliorating several pathological hallmarks of these diseases. The purpose of this review is to highlight the emerging role of plasmalogens in chronic inflammatory disorders as well as the promising role of plasmalogen replacement therapy in the treatment of these pathologies.
Collapse
Affiliation(s)
- José Carlos Bozelli
- Department of Biochemistry and Biomedical Sciences, Health Sciences Centre, McMaster University, Hamilton, ON, Canada
| | - Sayed Azher
- Department of Biochemistry and Biomedical Sciences, Health Sciences Centre, McMaster University, Hamilton, ON, Canada
| | - Richard M Epand
- Department of Biochemistry and Biomedical Sciences, Health Sciences Centre, McMaster University, Hamilton, ON, Canada
| |
Collapse
|
7
|
Rho-Proteins and Downstream Pathways as Potential Targets in Sepsis and Septic Shock: What Have We Learned from Basic Research. Cells 2021; 10:cells10081844. [PMID: 34440613 PMCID: PMC8391638 DOI: 10.3390/cells10081844] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/09/2021] [Accepted: 07/15/2021] [Indexed: 01/19/2023] Open
Abstract
Sepsis and septic shock are associated with acute and sustained impairment in the function of the cardiovascular system, kidneys, lungs, liver, and brain, among others. Despite the significant advances in prevention and treatment, sepsis and septic shock sepsis remain global health problems with elevated mortality rates. Rho proteins can interact with a considerable number of targets, directly affecting cellular contractility, actin filament assembly and growing, cell motility and migration, cytoskeleton rearrangement, and actin polymerization, physiological functions that are intensively impaired during inflammatory conditions, such as the one that occurs in sepsis. In the last few decades, Rho proteins and their downstream pathways have been investigated in sepsis-associated experimental models. The most frequently used experimental design included the exposure to bacterial lipopolysaccharide (LPS), in both in vitro and in vivo approaches, but experiments using the cecal ligation and puncture (CLP) model of sepsis have also been performed. The findings described in this review indicate that Rho proteins, mainly RhoA and Rac1, are associated with the development of crucial sepsis-associated dysfunction in different systems and cells, including the endothelium, vessels, and heart. Notably, the data found in the literature suggest that either the inhibition or activation of Rho proteins and associated pathways might be desirable in sepsis and septic shock, accordingly with the cellular system evaluated. This review included the main findings, relevance, and limitations of the current knowledge connecting Rho proteins and sepsis-associated experimental models.
Collapse
|
8
|
Local complement factor H protects kidney endothelial cell structure and function. Kidney Int 2021; 100:824-836. [PMID: 34139209 DOI: 10.1016/j.kint.2021.05.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 05/09/2021] [Accepted: 05/20/2021] [Indexed: 12/25/2022]
Abstract
Factor H (FH) is a critical regulator of the alternative complement pathway and its deficiency or mutation underlie kidney diseases such as dense deposit disease. Since vascular dysfunction is an important facet of kidney disease, maintaining optimal function of the lining endothelial cells is important for vascular health. To investigate the molecular mechanisms that are regulated by FH in endothelial cells, FH deficient and sufficient mouse kidney endothelial cell cultures were established. Endothelial FH deficiency resulted in cytoskeletal remodeling, increased angiogenic potential, loss of cellular layer integrity and increased cell proliferation. FH reconstitution prevented these FH-dependent proliferative changes. Respiratory flux analysis showed reduced basal mitochondrial respiration, ATP production and maximal respiratory capacity in FH deficient endothelial cells, while proton leak remained unaltered. Similar changes were observed in FH deficient human glomerular endothelial cells indicating the translational potential of these studies. Gene expression analysis revealed that the FH-dependent gene changes in mouse kidney endothelial cells include significant upregulation of genes involved in inflammation and the complement system. The transcription factor nuclear factor-kB, that regulates many biological processes, was translocated from the cytoplasm to the nucleus in the absence of FH. Thus, our studies show the functional relevance of intrinsic FH in kidney endothelial cells in man and mouse.
Collapse
|
9
|
Kurth MJ, McBride WT, McLean G, Watt J, Domanska A, Lamont JV, Maguire D, Fitzgerald P, Ruddock MW. Acute kidney injury risk in orthopaedic trauma patients pre and post surgery using a biomarker algorithm and clinical risk score. Sci Rep 2020; 10:20005. [PMID: 33203963 PMCID: PMC7673130 DOI: 10.1038/s41598-020-76929-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 10/23/2020] [Indexed: 12/22/2022] Open
Abstract
Acute kidney injury (AKI) after major trauma is associated with increased mortality. The aim of this study was to assess if measurement of blood biomarkers in combination with clinical characteristics could be used to develop a tool to assist clinicians in identifying which orthopaedic trauma patients are at risk of AKI. This is a prospective study of 237 orthopaedic trauma patients who were consecutively scheduled for open reduction and internal fixation of their fracture between May 2012 and August 2013. Clinical characteristics were recorded, and 28 biomarkers were analysed in patient blood samples. Post operatively a combination of H-FABP, sTNFR1 and MK had the highest predictive ability to identify patients at risk of developing AKI (AUROC 0.885). Three clinical characteristics; age, dementia and hypertension were identified in the orthopaedic trauma patients as potential risks for the development of AKI. Combining biomarker data with clinical characteristics allowed us to develop a proactive AKI clinical tool, which grouped patients into four risk categories that were associated with a clinical management regime that impacted patient care, management, length of hospital stay, and efficient use of hospital resources.
Collapse
Affiliation(s)
- Mary Jo Kurth
- Randox Laboratories Ltd, 55 Diamond Road, Crumlin, County Antrim, BT29 4QY, Northern Ireland, UK
| | - William T McBride
- Department of Cardiac Anaesthesia, Royal Victoria Hospital, Belfast Health and Social Care Trust, 274 Grosvenor Road, Belfast, BT12 6BA, Northern Ireland, UK
| | - Gavin McLean
- Trauma and Orthopaedics, Craigavon Area Hospital, 68 Lurgan Road, Portadown, Craigavon, BT63 5QQ, Northern Ireland, UK
| | - Joanne Watt
- Randox Laboratories Ltd, 55 Diamond Road, Crumlin, County Antrim, BT29 4QY, Northern Ireland, UK
| | - Anna Domanska
- Randox Laboratories Ltd, 55 Diamond Road, Crumlin, County Antrim, BT29 4QY, Northern Ireland, UK
| | - John V Lamont
- Randox Laboratories Ltd, 55 Diamond Road, Crumlin, County Antrim, BT29 4QY, Northern Ireland, UK
| | - Daniel Maguire
- Randox Laboratories Ltd, 55 Diamond Road, Crumlin, County Antrim, BT29 4QY, Northern Ireland, UK
| | - Peter Fitzgerald
- Randox Laboratories Ltd, 55 Diamond Road, Crumlin, County Antrim, BT29 4QY, Northern Ireland, UK
| | - Mark W Ruddock
- Randox Laboratories Ltd, 55 Diamond Road, Crumlin, County Antrim, BT29 4QY, Northern Ireland, UK.
| |
Collapse
|
10
|
MBD2 Mediates Septic AKI through Activation of PKCη/p38MAPK and the ERK1/2 Axis. MOLECULAR THERAPY-NUCLEIC ACIDS 2020; 23:76-88. [PMID: 33335794 PMCID: PMC7723772 DOI: 10.1016/j.omtn.2020.09.028] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/23/2020] [Indexed: 12/15/2022]
Abstract
Our previous study demonstrated that the methyl-CpG-binding domain protein 2 (MBD2) mediates vancomycin (VAN)-induced acute kidney injury (AKI). However, the role and regulation of MBD2 in septic AKI are unknown. Herein, MBD2 was induced by lipopolysaccharide (LPS) in Boston University mouse proximal tubules (BUMPTs) and mice. For both in vitro and in vivo experiments, we showed that inhibition of MBD2 by MBD2 small interfering RNA (siRNA) and MBD2-knockout (KO) substantially improved the survival rate and attenuated both LPS and cecal ligation and puncture (CLP)-induced AKI, renal cell apoptosis, and inflammatory factor production. Global genetic expression analyses and in vitro experiments suggest that the expression of protein kinase C eta (PKCη), caused by LPS, is markedly suppressed in MBD2-KO mice and MBD2 siRNA, respectively. Mechanistically, chromatin immunoprecipitation (ChIP) analysis indicates that MBD2 directly binds to promoter region CpG islands of PKCη via suppression of promoter methylation. Furthermore, PKCη siRNA improves the survival rate and attenuates LPS-induced BUMPT cell apoptosis and inflammatory factor production via inactivation of p38 mitogen-activated protein kinase (MAPK) and extracellular signal-regulated kinase (ERK)1/2, which were further verified by PKCη siRNA treatment in CLP-induced AKI. Finally, MBD2-KO mice exhibited CLP-induced renal cell apoptosis and inflammatory factor production by inactivation of PKCη/p38MAPK and ERK1/2 signaling. Taken together, the data indicate that MBD2 mediates septic-induced AKI through the activation of PKCη/p38MAPK and the ERK1/2 axis. MBD2 represents a potential target for treatment of septic AKI.
Collapse
|
11
|
Bhatraju PK, Cohen M, Nagao RJ, Morrell ED, Kosamo S, Chai XY, Nance R, Dmyterko V, Delaney J, Christie JD, Liu KD, Mikacenic C, Gharib SA, Liles WC, Zheng Y, Christiani DC, Himmelfarb J, Wurfel MM. Genetic variation implicates plasma angiopoietin-2 in the development of acute kidney injury sub-phenotypes. BMC Nephrol 2020; 21:284. [PMID: 32680471 PMCID: PMC7368773 DOI: 10.1186/s12882-020-01935-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 07/07/2020] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND We previously identified two acute kidney injury (AKI) sub-phenotypes (AKI-SP1 and AKI-SP2) with different risk of poor clinical outcomes and response to vasopressor therapy. Plasma biomarkers of endothelial dysfunction (tumor necrosis factor receptor-1, angiopoietin-1 and 2) differentiated the AKI sub-phenotypes. However, it is unknown whether these biomarkers are simply markers or causal mediators in the development of AKI sub-phenotypes. METHODS We tested for associations between single-nucleotide polymorphisms within the Angiopoietin-1, Angiopoietin-2, and Tumor Necrosis Factor Receptor 1A genes and AKI- SP2 in 421 critically ill subjects of European ancestry. Top performing single-nucleotide polymorphisms (FDR < 0.05) were tested for cis-biomarker expression and whether genetic risk for AKI-SP2 is mediated through circulating biomarkers. We also completed in vitro studies using human kidney microvascular endothelial cells. Finally, we calculated the renal clearance of plasma biomarkers using 20 different timed urine collections. RESULTS A genetic variant, rs2920656C > T, near ANGPT2 was associated with reduced risk of AKI-SP2 (odds ratio, 0.45; 95% CI, 0.31-0.66; adjusted FDR = 0.003) and decreased plasma angiopoietin-2 (p = 0.002). Causal inference analysis showed that for each minor allele (T) the risk of developing AKI-SP2 decreases by 16%. Plasma angiopoietin-2 mediated 41.5% of the rs2920656 related risk for AKI-SP2. Human kidney microvascular endothelial cells carrying the T allele of rs2920656 produced numerically lower levels of angiopoietin-2 although this was not statistically significant (p = 0.07). Finally, analyses demonstrated that angiopoietin-2 is minimally renally cleared in critically ill subjects. CONCLUSION Genetic mediation analysis provides supportive evidence that angiopoietin-2 plays a causal role in risk for AKI-SP2.
Collapse
Affiliation(s)
- Pavan K. Bhatraju
- grid.34477.330000000122986657Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Seattle, WA 98104 USA ,grid.34477.330000000122986657Kidney Research Institute, Division of Nephrology, Department of Medicine, University of Washington, Seattle, USA
| | - Max Cohen
- grid.34477.330000000122986657Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Seattle, WA 98104 USA
| | - Ryan J. Nagao
- grid.34477.330000000122986657Department of Bioengineering, University of Washington and Center for Cardiovascular Biology, Seattle, USA ,grid.34477.330000000122986657Institute of Stem Cell and Regenerative Medicine, University of Washington, Seattle, USA
| | - Eric D. Morrell
- grid.34477.330000000122986657Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Seattle, WA 98104 USA
| | - Susanna Kosamo
- grid.34477.330000000122986657Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Seattle, WA 98104 USA
| | - Xin-Ya Chai
- grid.34477.330000000122986657Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Seattle, WA 98104 USA
| | - Robin Nance
- grid.34477.330000000122986657Department of Epidemiology, University of Washington, Seattle, USA
| | - Victoria Dmyterko
- grid.34477.330000000122986657Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Seattle, WA 98104 USA
| | - Joseph Delaney
- grid.34477.330000000122986657Department of Epidemiology, University of Washington, Seattle, USA
| | - Jason D. Christie
- grid.25879.310000 0004 1936 8972Division of Pulmonary, Allergy, and Critical Care and Center for Clinical Epidemiology and Biostatistics, Department of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Kathleen D. Liu
- grid.266102.10000 0001 2297 6811Divisions of Nephrology and Critical Care Medicine, University of California San Francisco, San Francisco, USA
| | - Carmen Mikacenic
- grid.34477.330000000122986657Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Seattle, WA 98104 USA
| | - Sina A. Gharib
- grid.34477.330000000122986657Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Seattle, WA 98104 USA
| | - W. Conrad Liles
- grid.34477.330000000122986657Department of Medicine, University of Washington, Seattle, USA
| | - Ying Zheng
- grid.34477.330000000122986657Department of Bioengineering, University of Washington and Center for Cardiovascular Biology, Seattle, USA ,grid.34477.330000000122986657Institute of Stem Cell and Regenerative Medicine, University of Washington, Seattle, USA
| | - David C. Christiani
- grid.38142.3c000000041936754XDepartments of Environmental Health and Epidemiology, Harvard TH Chan School of Public Health, Harvard University and Pulmonary and Critical Care Division, Cambridge, USA ,Department of Medicine, MA General Hospital/Harvard Medical School, Boston, USA
| | - Jonathan Himmelfarb
- grid.34477.330000000122986657Kidney Research Institute, Division of Nephrology, Department of Medicine, University of Washington, Seattle, USA
| | - Mark M. Wurfel
- grid.34477.330000000122986657Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Seattle, WA 98104 USA ,grid.34477.330000000122986657Kidney Research Institute, Division of Nephrology, Department of Medicine, University of Washington, Seattle, USA
| |
Collapse
|
12
|
Özsobacı NP, Ergün DD, Tunçdemir M, Özçelik D. Protective Effects of Zinc on 2.45 GHz Electromagnetic Radiation-Induced Oxidative Stress and Apoptosis in HEK293 Cells. Biol Trace Elem Res 2020; 194:368-378. [PMID: 31317470 DOI: 10.1007/s12011-019-01811-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/01/2019] [Indexed: 12/19/2022]
Abstract
Several epidemiological studies have shown that exposure to electromagnetic radiation (EMR) can be harmful to human health. The purpose of this study was to examine oxidative parameters and apoptosis induced by EMR in human kidney embryonic cells (HEK293) and to investigate whether zinc (Zn) has protective effect on EMR-induced apoptosis in HEK293 cells. For our experiment, HEK293 cells were divided into four main groups, control, EMR, 50 μM Zn + EMR, and 100 μM Zn + EMR. HEK293 cells of EMR groups were exposed to 2.45 GHz EMR for 1 h. In Zn groups, HEK293 cells were incubated with different concentrations of Zn for 48 h before EMR exposure. Oxidative stress parameters were determined by spectrophotometric method; bcl-2 and caspase-3 were assessed immunohistochemically and TUNEL method was performed for apoptotic activity. EMR group had higher malondialdehyde (MDA) level and lower superoxide dismutase (SOD) activity compared with control group. In Zn-applied groups, MDA was decreased and SOD activity was increased compared with EMR group. The number of the apoptotic cells and caspase-3 immunopositive cells at EMR group was increased significantly compared with the control group, whereas bcl-2 was decreased. Besides, Zn-treated groups showed a significant reduction in the number of apoptotic cells and caspase-3 from that of EMR group, whereas there was an increase in bcl-2 immunopositivity. Our findings show that EMR caused oxidative stress and apoptotic activation in HEK293 cells. Zn seems to have protective effects on the EMR by increasing SOD activity and bcl-2 immunopositivity, decreasing lipid peroxidation and caspas-3 immunopositivity.
Collapse
Affiliation(s)
- Nural Pastacı Özsobacı
- Biophysics Department, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey.
| | - Dilek Düzgün Ergün
- Biophysics Department, Faculty of Medicine, Istanbul Aydın University, Istanbul, Turkey
| | - Matem Tunçdemir
- Medical Biology Department, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Derviş Özçelik
- Biophysics Department, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey
| |
Collapse
|
13
|
Gee T, Farrar E, Wang Y, Wu B, Hsu K, Zhou B, Butcher J. NFκB (Nuclear Factor κ-Light-Chain Enhancer of Activated B Cells) Activity Regulates Cell-Type-Specific and Context-Specific Susceptibility to Calcification in the Aortic Valve. Arterioscler Thromb Vasc Biol 2020; 40:638-655. [PMID: 31893948 DOI: 10.1161/atvbaha.119.313248] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Although often studied independently, little is known about how aortic valve endothelial cells and valve interstitial cells interact collaborate to maintain tissue homeostasis or drive valve calcific pathogenesis. Inflammatory signaling is a recognized initiator of valve calcification, but the cell-type-specific downstream mechanisms have not been elucidated. In this study, we test how inflammatory signaling via NFκB (nuclear factor κ-light-chain enhancer of activated B cells) activity coordinates unique and shared mechanisms of valve endothelial cells and valve interstitial cells differentiation during calcific progression. Approach and Results: Activated NFκB was present throughout the calcific aortic valve disease (CAVD) process in both endothelial and interstitial cell populations in an established mouse model of hypercholesterolemia-induced CAVD and in human CAVD. NFκB activity induces endothelial to mesenchymal transformation in 3-dimensional cultured aortic valve endothelial cells and subsequent osteogenic calcification of transformed cells. Similarly, 3-dimensional cultured valve interstitial cells calcified via NFκB-mediated osteogenic differentiation. NFκB-mediated endothelial to mesenchymal transformation was directly demonstrated in vivo during CAVD via genetic lineage tracking. Genetic deletion of NFκB in either whole valves or valve endothelium only was sufficient to prevent valve-specific molecular and cellular mechanisms of CAVD in vivo despite the persistence of a CAVD inducing environment. CONCLUSIONS Our results identify NFκB signaling as an essential molecular regulator for both valve endothelial and interstitial participation in CAVD pathogenesis. Direct demonstration of valve endothelial cell endothelial to mesenchymal transformation transmigration in vivo during CAVD highlights a new cellular population for further investigation in CAVD morbidity. The efficacy of valve-specific NFκB modulation in inhibiting hypercholesterolemic CAVD suggests potential benefits of multicell type integrated investigation for biological therapeutic development and evaluation for CAVD.
Collapse
Affiliation(s)
- Terence Gee
- From the Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY (T.G., E.F., K.H., J.B.)
| | - Emily Farrar
- From the Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY (T.G., E.F., K.H., J.B.)
| | - Yidong Wang
- Department of Genetics, Pediatrics, and Medicine (Cardiology), Wilf Cardiovascular Research Institute, Albert Einstein College of Medicine, Bronx, NY (Y.W., B.W., B.Z.)
| | - Bingruo Wu
- Department of Genetics, Pediatrics, and Medicine (Cardiology), Wilf Cardiovascular Research Institute, Albert Einstein College of Medicine, Bronx, NY (Y.W., B.W., B.Z.)
| | - Kevin Hsu
- From the Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY (T.G., E.F., K.H., J.B.)
| | - Bin Zhou
- Department of Genetics, Pediatrics, and Medicine (Cardiology), Wilf Cardiovascular Research Institute, Albert Einstein College of Medicine, Bronx, NY (Y.W., B.W., B.Z.)
| | - Jonathan Butcher
- From the Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY (T.G., E.F., K.H., J.B.)
| |
Collapse
|
14
|
A review on anti-inflammatory activity of green synthesized zinc oxide nanoparticle: Mechanism-based approach. Bioorg Chem 2019; 94:103423. [PMID: 31776035 DOI: 10.1016/j.bioorg.2019.103423] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/18/2019] [Accepted: 11/04/2019] [Indexed: 12/26/2022]
Abstract
Inflammation plays a very important role in the pathogenesis of various diseases like atherosclerosis, rheumatoid arthritis, asthma, and cancer. Lack of anti-inflammatory drugs and vectors provokes the need for developing new molecules for the management of inflammatory disorders. Nanotechnology has emerged as a wonderful research area in the past decade owing to its enhanced properties than bulk counterparts. This paper discusses the green synthesis of zinc oxide nanoparticle (ZnO NPs) and various characterization tools employed to comprehend the physiochemical properties of nanoparticles. ZnO NPs interaction with cells and its pharmacokinetic behavior inside the cells has also been discussed. The anti-inflammatory activity of ZnO NPs has been elucidated with the mechanism-based approach. A concise literature review has been included which summarizes the size, shape of ZnO NPs and the inflammatory model used for analyzing the anti-inflammatory activity of ZnO NPs. ZnO NPs potential offering towards anti-inflammatory activity like stable nature, selective targeting has been discussed briefly. The present study highlights the potential of ZnO NPs as an anti-inflammatory drug molecule or a vector for drug delivery.
Collapse
|
15
|
Pastacı Özsobacı N, Düzgün Ergün D, Durmuş S, Tunçdemir M, Uzun H, Gelişgen R, Özçelik D. Selenium supplementation ameliorates electromagnetic field-induced oxidative stress in the HEK293 cells. J Trace Elem Med Biol 2018; 50:572-579. [PMID: 29685784 DOI: 10.1016/j.jtemb.2018.04.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/15/2018] [Accepted: 04/09/2018] [Indexed: 12/18/2022]
Abstract
There is a widespread use of 2.4 GHz electromagnetic radiation emitting devices especially in communication and education. Recent studies show the adverse effects of electromagnetic fields (EMF) such as oxidative stress, cellular damage and apoptosis on tissues. Selenium (Se) has an antioxidant properties by inhibiting oxidative damage being within the structure of antioxidant enzymes like glutathione peroxidase (GSH-Px) and it has also regulatory function for cell cycle and apoptosis. The aim of this study was to investigate the effect of Se on 2.4 GHz frequency EMF exposed human embryonic kidney cells (HEK293) by means of alterations in apoptotic and oxidative stress parameters. Our study was planned as control, EMF, 100 nM Se + EMF, 200 nM Se + EMF groups. EMF groups were exposed to 2.4 GHz EMF for 1 h, element groups were incubated with two different doses of Se added cell culture medium for 48 h before EMF exposure. MDA levels were significantly higher whereas SOD and GSH-Px activities were significantly lower in EMF compared to control. 100 and 200 nM Se + EMF application decreased MDA levels, increased SOD and GSH-Px activities than EMF. Apoptosis and caspase-3 were statistically significantly higher but bcl-2 was lower in EMF than control. Apoptosis and caspase-3 were lower in 100 and 200 nM Se + EMF, although bcl-2 were higher than EMF. In conclusion, Se has protective effects against 2.4 GHz EMF-induced oxidative stress by reducing lipid peroxidation, regulating SOD and GSH-Px activity. Also, Se has inhibitory effect on 2.4 GHz EMF induced apoptosis by increasing the expression of anti-apoptotic protein bcl-2 and suppressing apoptosis regulatory protein caspase-3.
Collapse
Affiliation(s)
| | - Dilek Düzgün Ergün
- Biophysics Dept., Faculty of Medicine, Istanbul Aydın University, Istanbul, Turkey.
| | - Sinem Durmuş
- Biochemistry Dept., Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey.
| | - Matem Tunçdemir
- Medical Biology Dept., Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey.
| | - Hafize Uzun
- Biochemistry Dept., Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey.
| | - Remise Gelişgen
- Biochemistry Dept., Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey.
| | - Derviş Özçelik
- Biophysics Dept., Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey.
| |
Collapse
|
16
|
Gao W, Ju YN, Chen JF, Zhou Q, Song CY, Wang YZ, Cao HL, Yang WC. Adrenomedullin Reduces Secondary Injury and Improves Outcome in Rats with Fluid Percussion Brain Injury. World Neurosurg 2018; 119:e765-e773. [DOI: 10.1016/j.wneu.2018.07.265] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 07/28/2018] [Accepted: 07/30/2018] [Indexed: 01/08/2023]
|
17
|
Plasmalogens Inhibit Endocytosis of Toll-like Receptor 4 to Attenuate the Inflammatory Signal in Microglial Cells. Mol Neurobiol 2018; 56:3404-3419. [DOI: 10.1007/s12035-018-1307-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 08/07/2018] [Indexed: 12/21/2022]
|
18
|
Gao P, He C, Zhang C, Li B, Guo Y, Zhao W, Xie Q, Zhang X. Preventive effect on endothelial surface layer damage of Fusu agent in LPS-induced acute lung injury in rats. Mol Cell Biochem 2018; 450:113-123. [PMID: 29948507 PMCID: PMC6328519 DOI: 10.1007/s11010-018-3378-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 06/11/2018] [Indexed: 01/11/2023]
Abstract
Acute lung injury (ALI) is one of major causes of morbidity and mortality in intensive care. In pathophysiological events of ALI, endothelial surface layer (ESL) injury can result in capillary leakage as the initial event. The “Fusu agent”, a traditional Chinese medicine, can inhibit inflammatory factors, attenuate lung capillary leak as seen in our previous study. This study was aimed to explore the molecular mechanism of Fusu agent treatment with ALI. Consistent with previous studies, we found that Fusu agent has the protective effect on LPS-induced ALI model rats. Further investigation demonstrated that heparanase activation is necessary for the LPS-induced ALI model to aggravate ESL loss. Fusu agent can inhibit heparanase activation and heparan sulfate proteoglycans’ (HSPGs) degradation to mitigate the ESL injury. Furthermore, TNF-α and intercellular adhesion molecule-1 (ICAM-1) were significantly reduced upon Fusu agent pre-treatment to inhibit inflammatory cell influx and neutrophil adhesion in ALI. These findings shed light on the pharmacologic basis for the clinical application of traditional Chinese medicine in treating ALI.
Collapse
Affiliation(s)
- Peiyang Gao
- Critical Care Medicine, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China.
| | - Chengshi He
- Department of Respiratory, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Chuantao Zhang
- Infectious Disease Department, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Baixue Li
- Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yiling Guo
- Department of Emergency, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Wen Zhao
- Department of Emergency, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Quan Xie
- Critical Care Medicine, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xuemei Zhang
- Critical Care Medicine, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| |
Collapse
|
19
|
Ryu KJ, Kim NR, Rah SY, Jeong HJ, Kim HM. Immunomodulatory efficacy of Beauty-salt is mediated by the caspase-1/NF-κB/RIP2/MAP kinase pathway in mast cells. J Food Biochem 2017. [DOI: 10.1111/jfbc.12394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ka-Jung Ryu
- Department of Science in Korean Medicine, Graduate School; Kyung Hee University; Seoul 02447 Republic of Korea
| | - Na-Rae Kim
- Department of Science in Korean Medicine, Graduate School; Kyung Hee University; Seoul 02447 Republic of Korea
| | - So-Young Rah
- Department of Biochemistry; Chonbuk National University; Jeonju 54896 Republic of Korea
| | - Hyun-Ja Jeong
- Department of Food Science & Technology; Hoseo University; Asan, Chungnam 31499 Republic of Korea
| | - Hyung-Min Kim
- Department of Biochemistry; Chonbuk National University; Jeonju 54896 Republic of Korea
| |
Collapse
|
20
|
Kaur R, Manjal SK, Rawal RK, Kumar K. Recent synthetic and medicinal perspectives of tryptanthrin. Bioorg Med Chem 2017; 25:4533-4552. [DOI: 10.1016/j.bmc.2017.07.003] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/19/2017] [Accepted: 07/03/2017] [Indexed: 12/11/2022]
|
21
|
Lee NY, Chung K, Jin JS, Lee Y, An H. The Inhibitory Effect of Nodakenin on Mast‐Cell‐Mediated Allergic Inflammation Via Downregulation of NF‐κB and Caspase‐1 Activation. J Cell Biochem 2017; 118:3993-4001. [DOI: 10.1002/jcb.26055] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 04/11/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Na Young Lee
- Department of PharmacologyCollege of Korean MedicineSangji UniversityGangwon‐do 220‐702Republic of Korea
- Department of Herbal Medicine ResourcesChonbuk National UniversityIksan 570‐752Republic of Korea
| | - Kyung‐Sook Chung
- Catholic Precision Medicine Research CenterCollege of MedicineThe Catholic University of Korea222, Banpo‐daero, Seocho‐guSeoul 06591Republic of Korea
| | - Jong Sik Jin
- Department of Herbal Medicine ResourcesChonbuk National UniversityIksan 570‐752Republic of Korea
| | - Young‐Cheol Lee
- Department of HerbologyCollege of Korean MedicineSangji UniversityGangwon‐do 220‐702Republic of Korea
| | - Hyo‐Jin An
- Department of PharmacologyCollege of Korean MedicineSangji UniversityGangwon‐do 220‐702Republic of Korea
| |
Collapse
|
22
|
Galkin II, Pletjushkina OY, Zinovkin RA, Zakharova VV, Chernyak BV, Popova EN. Mitochondria-Targeted Antioxidant SkQR1 Reduces TNF-Induced Endothelial Permeability in vitro. BIOCHEMISTRY (MOSCOW) 2017; 81:1188-1197. [PMID: 27908243 DOI: 10.1134/s0006297916100163] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Prolonged or excessive increase in the circulatory level of proinflammatory tumor necrosis factor (TNF) leads to abnormal activation and subsequent damage to endothelium. TNF at high concentrations causes apoptosis of endothelial cells. Previously, using mitochondria-targeted antioxidants of SkQ family, we have shown that apoptosis of endothelial cells is dependent on the production of reactive oxygen species (ROS) in mitochondria (mito-ROS). Now we have found that TNF at low concentrations does not cause cell death but activates caspase-3 and caspase-dependent increase in endothelial permeability in vitro. This effect is probably due to the cleavage of β-catenin - an adherent junction protein localized in the cytoplasm. We have also shown that extracellular matrix metalloprotease 9 (MMP9) VE-cadherin shedding plays a major role in the TNF-induced endothelial permeability. The mechanisms of the caspase-3 and MMP9 activation are probably not related to each other since caspase inhibition did not affect VE-cadherin cleavage and MMP9 inhibition had no effect on the caspase-3 activation. Mitochondria-targeted antioxidant SkQR1 inhibited TNF-induced increase in endothelial permeability. SkQR1 also inhibited caspase-3 activation, β-catenin cleavage, and MMP9-dependent VE-cadherin shedding. The data suggest that mito-ROS are involved in the increase in endothelial permeability due to the activation of both caspase-dependent cleavage of intracellular proteins and of MMP9-dependent cleavage of the transmembrane cell-to-cell contact proteins.
Collapse
Affiliation(s)
- I I Galkin
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow, 119991, Russia.
| | | | | | | | | | | |
Collapse
|
23
|
Rao J, Ye Z, Tang H, Wang C, Peng H, Lai W, Li Y, Huang W, Lou T. The RhoA/ROCK Pathway Ameliorates Adhesion and Inflammatory Infiltration Induced by AGEs in Glomerular Endothelial Cells. Sci Rep 2017; 7:39727. [PMID: 28054559 PMCID: PMC5215591 DOI: 10.1038/srep39727] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 11/28/2016] [Indexed: 11/09/2022] Open
Abstract
A recent study demonstrated that advanced glycation end products (AGEs) play a role in monocyte infiltration in mesangial areas in diabetic nephropathy. The Ras homolog gene family, member A Rho kinase (RhoA/ROCK) pathway plays a role in regulating cell migration. We hypothesized that the RhoA/ROCK pathway affects adhesion and inflammation in endothelial cells induced by AGEs. Rat glomerular endothelial cells (rGECs) were cultured with AGEs (80 μg/ml) in vitro. The ROCK inhibitor Y27632 (10 nmol/l) and ROCK1-siRNA were used to inhibit ROCK. We investigated levels of the intercellular adhesion molecule 1 (ICAM-1) and monocyte chemoattractant protein1 (MCP-1) in rGECs. Db/db mice were used as a diabetes model and received Fasudil (10 mg/kg/d, n = 6) via intraperitoneal injection for 12 weeks. We found that AGEs increased the expression of ICAM-1 and MCP-1 in rGECs, and the RhoA/ROCK pathway inhibitor Y27632 depressed the release of adhesion molecules. Moreover, blocking the RhoA/ROCK pathway ameliorated macrophage transfer to the endothelium. Reduced expression of adhesion molecules and amelioration of inflammatory cell infiltration in the glomerulus were observed in db/db mice treated with Fasudil. The RhoA/ROCK pathway plays a role in adhesion molecule expression and inflammatory cell infiltration in glomerular endothelial cells induced by AGEs.
Collapse
Affiliation(s)
- Jialing Rao
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yet-sen University, Guangzhou, Guangdong 510630, China
| | - Zengchun Ye
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yet-sen University, Guangzhou, Guangdong 510630, China
| | - Hua Tang
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yet-sen University, Guangzhou, Guangdong 510630, China
| | - Cheng Wang
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yet-sen University, Guangzhou, Guangdong 510630, China
| | - Hui Peng
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yet-sen University, Guangzhou, Guangdong 510630, China
| | - Weiyan Lai
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yet-sen University, Guangzhou, Guangdong 510630, China
| | - Yin Li
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yet-sen University, Guangzhou, Guangdong 510630, China
| | - Wanbing Huang
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yet-sen University, Guangzhou, Guangdong 510630, China
| | - Tanqi Lou
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yet-sen University, Guangzhou, Guangdong 510630, China
| |
Collapse
|
24
|
Husi H, Human C. Molecular determinants of acute kidney injury. J Inj Violence Res 2016; 7:75-86. [PMID: 26104320 PMCID: PMC4522318 DOI: 10.5249/jivr.v7i2.615] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Accepted: 07/10/2014] [Indexed: 12/18/2022] Open
Abstract
Background: Acute kidney injury (AKI) is a condition that leads to a rapid deterioration of renal function associated with impairment to maintain electrolyte and acid balance, and, if left untreated, ultimately irreversible kidney damage and renal necrosis. There are a number of causes that can trigger AKI, ranging from underlying conditions as well as trauma and surgery. Specifically, the global rise in surgical procedures led to a substantial increase of AKI incidence rates, which in turn impacts on mortality rates, quality of life and economic costs to the healthcare system. However, no effective therapy for AKI exists. Current approaches, such as pharmacological intervention, help in alleviating symptoms in slowing down the progression, but do not prevent or reverse AKI-induced organ damage. Methods: An in-depth understanding of the molecular machinery involved in and modulated by AKI induction and progression is necessary to specifically pharmacologically target key molecules. A major hurdle to devise a successful strategy is the multifactorial and complex nature of the disorder itself, whereby the activation of a number of seemingly independent molecular pathways in the kidney leads to apoptotic and necrotic events. Results: The renin-angiotensin-aldosterone-system (RAAS) axis appears to be a common element, leading to downstream events such as triggers of immune responses via the NFB pathway. Other pathways intricately linked with AKI-induction and progression are the tumor necrosis factor alpha (TNF α) and transforming growth factor beta (TGF β) signaling cascades, as well as a number of other modulators. Surprisingly, it has been shown that the involvement of the glutamatergic axis, believed to be mainly a component of the neurological system, is also a major contributor. Conclusions: Here we address the current understanding of the molecular pathways evoked in AKI, their interplay, and the potential to pharmacologically intervene in the effective prevention and/or progression of AKI.
Collapse
Affiliation(s)
- Holger Husi
- BHF Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, UK.
| | | |
Collapse
|
25
|
Kuybulu AE, Öktem F, Çiriş İM, Sutcu R, Örmeci AR, Çömlekçi S, Uz E. Effects of long-term pre- and post-natal exposure to 2.45 GHz wireless devices on developing male rat kidney. Ren Fail 2016; 38:571-80. [PMID: 26905323 DOI: 10.3109/0886022x.2016.1148937] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
PURPOSE The aim of the present study was to investigate oxidative stress and apoptosis in kidney tissues of male Wistar rats that pre- and postnatally exposed to wireless electromagnetic field (EMF) with an internet frequency of 2.45 GHz for a long time. METHODS The study was conducted in three groups of rats which were pre-natal, post-natal. and sham exposed groups. Oxidative stress markers and histological evaluation of kidney tissues were studied. RESULTS Renal tissue malondialdehyde (MDA) and total oxidant (TOS) levels of pre-natal group were high and total antioxidant (TAS) and superoxide dismutase (SOD) levels were low. Spot urine NAG/creatinine ratio was significantly higher in pre- and post-natal groups (p < 0.001). Tubular injury was detected in most of the specimens in post-natal groups. Immunohistochemical analysis showed low-intensity staining with Bax in cortex, high-intensity staining with Bcl-2 in cortical and medullar areas of pre-natal group (p values, 0.000, 0.002, 0.000, respectively) when compared with sham group. Bcl2/Bax staining intensity ratios of medullar and cortical area was higher in pre-natal group than sham group (p = 0.018, p = 0.011). CONCLUSION Based on this study, it is thought that chronic pre- and post-natal period exposure to wireless internet frequency of EMF may cause chronic kidney damages; staying away from EMF source in especially pregnancy and early childhood period may reduce negative effects of exposure on kidney.
Collapse
Affiliation(s)
- Ayça Esra Kuybulu
- a Department of Pediatric Nephrology, Faculty of Medicine , Suleyman Demirel University , Isparta , Turkey
| | - Faruk Öktem
- b Department of Pediatric Nephrology, Faculty of Medicine , Bezmi Alem University , Istanbul , Turkey
| | - İbrahim Metin Çiriş
- c Department of Pathology, Faculty of Medicine , Suleyman Demirel University , Isparta , Turkey
| | - Recep Sutcu
- d Department of Biochemistry , Katip Celebi Faculty of Medicine , Izmir , Turkey
| | - Ahmet Rıfat Örmeci
- e Department of Pediatrics, Faculty of Medicine , Suleyman Demirel University , Isparta , Turkey
| | - Selçuk Çömlekçi
- f Department of Electronics and Communication, Faculty of Engineering , Suleyman Demirel University , Isparta , Turkey
| | - Efkan Uz
- g Department of Biochemistry, Faculty of Medicine , Suleyman Demirel University , Isparta , Turkey
| |
Collapse
|
26
|
Tan RJ. TNF ROCKs the boat as the kidney endothelium springs a leak. Physiol Rep 2016; 4:4/1/e12678. [PMID: 26755739 PMCID: PMC4760396 DOI: 10.14814/phy2.12678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Roderick J Tan
- Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| |
Collapse
|
27
|
Xu C, Wu X, Hack BK, Bao L, Cunningham PN. TNF causes changes in glomerular endothelial permeability and morphology through a Rho and myosin light chain kinase-dependent mechanism. Physiol Rep 2015; 3:3/12/e12636. [PMID: 26634902 PMCID: PMC4760430 DOI: 10.14814/phy2.12636] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A key function of the endothelium is to serve as a regulated barrier between tissue compartments. We have previously shown that tumor necrosis factor (TNF) plays a crucial role in lipopolysaccharide (LPS)‐induced acute kidney injury, in part by causing injury to the renal endothelium through its receptor TNFR1. Here, we report that TNF increased permeability to albumin in primary culture mouse renal endothelial cells, as well as human glomerular endothelial cells. This process occurred in association with changes in the actin cytoskeleton and was associated with gaps between previously confluent cells in culture and decreases in the tight junction protein occludin. This process was dependent on myosin light chain activation, as seen by its prevention with Rho‐associated kinase and myosin light chain kinase (MLCK) inhibitors. Surprisingly, permeability was not blocked by inhibition of apoptosis with caspase inhibitors. Additionally, we found that the renal glycocalyx, which plays an important role in barrier function, was also degraded by TNF in a Rho and MLCK dependent fashion. TNF treatment caused a decrease in the size of endothelial fenestrae, dependent on Rho and MLCK, although the relevance of this to changes in permeability is uncertain. In summary, TNF‐induced barrier dysfunction in renal endothelial cells is crucially dependent upon the Rho/MLCK signaling pathway.
Collapse
Affiliation(s)
- Chang Xu
- Section of Nephrology, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Xiaoyan Wu
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Bradley K Hack
- Section of Nephrology, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Lihua Bao
- Section of Nephrology, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Patrick N Cunningham
- Section of Nephrology, Department of Medicine, University of Chicago, Chicago, Illinois
| |
Collapse
|
28
|
Blædel M, Sams A, Boonen HCM, Sheykhzade M. Increased Contractile Response to Noradrenaline Induced By Factors Associated with the Metabolic Syndrome in Cultured Small Mesenteric Arteries. Pharmacology 2015; 97:48-56. [PMID: 26587661 DOI: 10.1159/000442259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 11/04/2015] [Indexed: 11/19/2022]
Abstract
UNLABELLED This study investigated the effect of the metabolic syndrome associated risk factors hyperglycemia (glucose [Glc]), hyperinsulinemia (insulin [Ins]) and low-grade inflammation (tumor necrosis factor α [TNFα]) on the vasomotor responses of resistance arteries. Isolated small mesenteric arteries from 3-month-old Sprague-Dawley rats, were suspended for 21-23 h in tissue cultures containing either elevated Glc (30 mmol/l), Ins (100 nmol/l), TNFα (100 ng/ml) or combinations thereof. After incubation, the vascular response to noradrenaline (NA), phenylephrine, isoprenaline and NA in the presence of propranolol (10 µmol/l) was measured by wire myography. RESULTS Arteries exposed only to combinations of the risk factors showed a significant 1.6-fold increase in the contractile NA sensitivity, which suggests that complex combinations of metabolic risk factors might lead to changes in vascular tone.
Collapse
Affiliation(s)
- Martin Blædel
- Diabetes Biology, Novo Nordisk A/S, Novo Nordisk Park, Mx00E5;lx00F8;v, Denmark
| | | | | | | |
Collapse
|
29
|
Li YR, Yang WX. Myosin superfamily: The multi-functional and irreplaceable factors in spermatogenesis and testicular tumors. Gene 2015; 576:195-207. [PMID: 26478466 DOI: 10.1016/j.gene.2015.10.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 09/21/2015] [Accepted: 10/12/2015] [Indexed: 10/22/2022]
Abstract
Spermatogenesis is a fundamental process in sexual development and reproduction, in which the diploid spermatogonia transform into haploid mature spermatozoa. This process is under the regulation of multiple factors and pathway. Myosin has been implicated in various aspects during spermatogenesis. Myosins constitute a diverse superfamily of actin-based molecular motors that translocate along microfilament in an ATP-dependent manner, and six kinds of myosins have been proved that function during spermatogenesis. In mitosis and meiosis, myosins play an important role in spindle assembly and positioning, karyokinesis and cytokinesis. During spermiogenesis, myosins participate in acrosomal formation, nuclear morphogenesis, mitochondrial translocation and spermatid individualization. In this review, we summarize current understanding of the functions of myosin in spermatogenesis and some reproductive system diseases such as testicular tumors and prostate cancer, and discuss the roles of possible upstream molecules which regulate myosin in these processes.
Collapse
Affiliation(s)
- Yan-Ruide Li
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Wan-Xi Yang
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou 310058, China.
| |
Collapse
|
30
|
Szymonski M, Targosz-Korecka M, Malek-Zietek KE. Nano-mechanical model of endothelial dysfunction for AFM-based diagnostics at the cellular level. Pharmacol Rep 2015; 67:728-35. [DOI: 10.1016/j.pharep.2015.05.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 05/04/2015] [Accepted: 05/06/2015] [Indexed: 12/17/2022]
|
31
|
Stefaniak J, Schiefer J, Miller EJ, Krenn CG, Baron DM, Faybik P. Macrophage migration inhibitory factor as a potential predictor for requirement of renal replacement therapy after orthotopic liver transplantation. Liver Transpl 2015; 21:662-9. [PMID: 25762421 DOI: 10.1002/lt.24103] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 02/08/2015] [Indexed: 12/13/2022]
Abstract
Acute kidney injury (AKI) after orthotopic liver transplantation (OLT) is associated with a poor clinical outcome. Because there is no specific treatment for postoperative AKI, early recognition and prevention are fundamental therapeutic approaches. Concentrations of the proinflammatory cytokine macrophage migration inhibitory factor (MIF) are elevated in patients with kidney disease. We hypothesized that plasma MIF concentrations would be greater in patients developing AKI after OLT compared with patients with normal kidney function. Twenty-eight patients undergoing OLT were included in the study. Kidney injury was classified according to AKI network criteria. Fifteen patients (54%) developed severe AKI after OLT, 11 (39%) requiring renal replacement therapy (RRT). On the first postoperative day, patients with severe AKI had greater plasma MIF concentrations (237 ± 123 ng/mL) than patients without AKI (95 ± 63 ng/mL; P < 0.001). The area under the receiver operating characteristic (ROC) curve for predicting severe AKI was 0.87 [95% confidence interval (CI), 0.69-0.97] for plasma MIF, 0.61 (95% CI, 0.40-0.79) for serum creatinine (sCr), and 0.90 (95% CI, 0.72-0.98) for delta serum creatinine (ΔsCr). Plasma MIF (P = 0.02) and ΔsCr (P = 0.01) yielded a better predictive value than sCr for the development of severe AKI. Furthermore, the area under the ROC curve to predict the requirement of RRT was 0.87 (95% CI, 0.68-0.96) for plasma MIF, 0.65 (95% CI, 0.44-0.82) for sCr, and 0.72 (95% CI, 0.52-0.88) for ΔsCr. Plasma MIF had a better predictive value than sCr for the requirement of RRT (P = 0.02). In conclusion, postoperative plasma MIF concentrations were elevated in patients who developed severe AKI after OLT. Furthermore, plasma MIF concentrations showed a good prognostic value for identifying patients developing severe AKI or requiring postoperative RRT after OLT.
Collapse
Affiliation(s)
- Joanna Stefaniak
- Department of Anesthesia, General Intensive Care, and Pain Management, Medical University of Vienna, Vienna, Austria
| | | | | | | | | | | |
Collapse
|
32
|
Yamagata K, Xie Y, Suzuki S, Tagami M. Epigallocatechin-3-gallate inhibits VCAM-1 expression and apoptosis induction associated with LC3 expressions in TNFα-stimulated human endothelial cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2015; 22:431-437. [PMID: 25925964 DOI: 10.1016/j.phymed.2015.01.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 01/18/2015] [Accepted: 01/27/2015] [Indexed: 06/04/2023]
Abstract
Tumor necrosis factor alpha (TNF-α) promotes the expression of adhesion molecules and induces endothelial dysfunction, a process that can lead to atherosclerosis. Green tea consumption can inhibit endothelial dysfunction and attenuate the development of arteriosclerosis. The purpose of this study was to examine whether epigallocatechin-3-gallate (EGCG) prevents TNF-α-dependent endothelial dysfunction. Here, we compared the regulatory effects of the green tea components EGCG and L-theanine against TNF-α-induced stimulation of adhesion molecule expression and apoptosis induction, which is associated with autophagy. Monocytic cell adhesion to human endothelial cells was measured using a fluorescently-labeled cell line, U-937. Caspase 3/7 activity was examined with a fluorescent probe and fluorescence microscopy. In addition, we analyzed the expression of several genes by RT-PCR. TNF-α-modulation of LC3 and VCAM1 protein levels were investigated by Western blot (WB). TNF-α induced adhesion of U937 cells to endothelial cells, and gene expression associated with adhesion molecules and apoptosis. On the other hand, EGCG and L-theanine inhibited TNF-α-induced adhesion of U937 cells to endothelial cells and inhibited increases in ICAM1, CCL2 and VCAM1 expression. Furthermore, EGCG and L-theanine inhibited TNF-α-induced apoptosis-related gene expression (e.g., CASP9), and caspase activity while inhibiting TNFα-induced VCAM1, LC3A and LC3B protein expression. Meanwhile, treatment of endothelial cells with autophagy inhibitor 3-methyladenine (3-MA) blocked EGCG-induced expression of CASP9. Together, these results indicate that EGCG can modulate TNF-α-induced monocytic cell adhesion, apoptosis and autophagy. We thus conclude that EGCG might be beneficial for inhibiting TNF-α-mediated human endothelial disorders by affecting LC3 expression-related processes.
Collapse
Affiliation(s)
- Kazuo Yamagata
- Department of Food Bioscience and Biotechnology, College of Bioresource Sciences, Nihon University (NUBS), Fujisawa, Japan.
| | - Yajie Xie
- Department of Food Bioscience and Biotechnology, College of Bioresource Sciences, Nihon University (NUBS), Fujisawa, Japan
| | - Sayaka Suzuki
- Department of Food Bioscience and Biotechnology, College of Bioresource Sciences, Nihon University (NUBS), Fujisawa, Japan
| | - Motoki Tagami
- Department of Internal Medicine, Sanraku Hospital, Chiyoda-Ku, Tokyo, Japan
| |
Collapse
|
33
|
|
34
|
Chen M, Ma L, Hall JE, Liu X, Ying Z. Dual regulation of tumor necrosis factor-α on myosin light chain phosphorylation in vascular smooth muscle. Am J Physiol Heart Circ Physiol 2014; 308:H398-406. [PMID: 25502110 DOI: 10.1152/ajpheart.00691.2014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We previously demonstrated that inhibitor κB kinase 2 (IKK2) is a myosin light chain kinase (MLCK). In the present study, we assess whether the prototypical activator of IKK2 tumor necrosis factor-α (TNF-α) regulates the MLCK activity of IKK2 and thus MLC phosphorylation in vascular smooth muscle cells (VSMCs). Kinase activity assay revealed that TNF-α downregulated the MLCK activity of IKK2 in human VSMCs (HVSMCs). However, Western blot analysis did not demonstrate a significant effect of TNF-α on MLC phosphorylation in HVSMCs, and myograph analysis did not reveal a significant effect of TNF-α on the contraction of the aorta from Sprague-Dawley rats and C57Bl/6j mice, suggesting a dual regulation of MLC phosphorylation by TNF-α. Confirming this notion, TNF-α significantly increased MLC phosphorylation in IKK2(-/-) but not wild-type cells. Furthermore, our results show that TNF-α increased GTP-bound RhoA and MLC phosphatase subunit MYPT1 phosphorylation and markedly reduced MLC phosphorylation in the presence of Rho-kinase inhibitor Y-27632, suggesting that downregulation of MLCK activity of IKK2 by TNF-α is antagonized by simultaneous RhoA/Rho-kinase activation. These results indicate that TNF-α dually regulates MLC phosphorylation through both IKK2 and RhoA/Rho-kinase pathways.
Collapse
Affiliation(s)
- Minjie Chen
- Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China; Davis Heart and Lung Research Institute, Ohio State University Medical Center, Columbus, Ohio; and
| | - Lan Ma
- Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - John E Hall
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Xuebo Liu
- Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Zhekang Ying
- Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China; Davis Heart and Lung Research Institute, Ohio State University Medical Center, Columbus, Ohio; and
| |
Collapse
|
35
|
Fu J, Lee K, Chuang PY, Liu Z, He JC. Glomerular endothelial cell injury and cross talk in diabetic kidney disease. Am J Physiol Renal Physiol 2014; 308:F287-97. [PMID: 25411387 DOI: 10.1152/ajprenal.00533.2014] [Citation(s) in RCA: 198] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Diabetic kidney disease (DKD) remains a leading cause of new-onset end-stage renal disease (ESRD), and yet, at present, the treatment is still very limited. A better understanding of the pathogenesis of DKD is therefore necessary to develop more effective therapies. Increasing evidence suggests that glomerular endothelial cell (GEC) injury plays a major role in the development and progression of DKD. Alteration of the glomerular endothelial cell surface layer, including its major component, glycocalyx, is a leading cause of microalbuminuria observed in early DKD. Many studies suggest a presence of cross talk between glomerular cells, such as between GEC and mesangial cells or GEC and podocytes. PDGFB/PDGFRβ is a major mediator for GEC and mesangial cell cross talk, while vascular endothelial growth factor (VEGF), angiopoietins, and endothelin-1 are the major mediators for GEC and podocyte communication. In DKD, GEC injury may lead to podocyte damage, while podocyte loss further exacerbates GEC injury, forming a vicious cycle. Therefore, GEC injury may predispose to albuminuria in diabetes either directly or indirectly by communication with neighboring podocytes and mesangial cells via secreted mediators. Identification of novel mediators of glomerular cell cross talk, such as microRNAs, will lead to a better understanding of the pathogenesis of DKD. Targeting these mediators may be a novel approach to develop more effective therapy for DKD.
Collapse
Affiliation(s)
- Jia Fu
- Research Institute of Nephrology, Jinling Hospital, Nanjing University School of Medicine, Jiangsu, China; and
| | - Kyung Lee
- Division of Nephrology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Peter Y Chuang
- Division of Nephrology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Zhihong Liu
- Research Institute of Nephrology, Jinling Hospital, Nanjing University School of Medicine, Jiangsu, China; and
| | - John Cijiang He
- Division of Nephrology, Icahn School of Medicine at Mount Sinai, New York, New York
| |
Collapse
|
36
|
Kim MH, Seo JH, Kim HM, Jeong HJ. Zinc oxide nanoparticles, a novel candidate for the treatment of allergic inflammatory diseases. Eur J Pharmacol 2014; 738:31-9. [DOI: 10.1016/j.ejphar.2014.05.030] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 04/28/2014] [Accepted: 05/10/2014] [Indexed: 12/21/2022]
|
37
|
Computed tomography-defined abdominal adiposity is associated with acute kidney injury in critically ill trauma patients*. Crit Care Med 2014; 42:1619-28. [PMID: 24776609 DOI: 10.1097/ccm.0000000000000306] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
OBJECTIVES Higher body mass index is associated with increased risk of acute kidney injury after major trauma. Since body mass index is nonspecific, reflecting lean, fluid, and adipose mass, we evaluated the use of CT to determine if abdominal adiposity underlies the body mass index-acute kidney injury association. DESIGN Prospective cohort study. SETTING Level I Trauma Center of a university hospital. PATIENTS Patients older than 13 years with an Injury Severity Score greater than or equal to 16 admitted to the trauma ICU were followed for development of acute kidney injury over 5 days. Those with isolated severe head injury or on chronic dialysis were excluded. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Clinical, anthropometric, and demographic variables were collected prospectively. CT images at the level of the L4-5 intervertebral disc space were extracted from the medical record and used by two operators to quantitate visceral adipose tissue and subcutaneous adipose tissue areas. Acute kidney injury was defined by Acute Kidney Injury Network creatinine and dialysis criteria. Of 400 subjects, 327 (81.8%) had CT scans suitable for analysis: 264 of 285 (92.6%) blunt trauma subjects and 63 of 115 (54.8%) penetrating trauma subjects. Visceral adipose tissue and subcutaneous adipose tissue areas were highly correlated between operators (intraclass correlation > 0.99, p < 0.001 for each) and within operator (intraclass correlation > 0.99, p < 0.001 for each). In multivariable analysis, the standardized risk of acute kidney injury was 15.1% (95% CI, 10.6-19.6%), 18.1% (14-22.2%), and 23.1% (18.3-27.9%) at the 25th, 50th, and 75th percentiles of visceral adipose tissue area, respectively (p = 0.001), with similar findings when using subcutaneous adipose tissue area as the adiposity measure. CONCLUSIONS Quantitation of abdominal adiposity using CT scans obtained for clinical reasons is feasible and highly reliable in critically ill trauma patients. Abdominal adiposity is independently associated with acute kidney injury in this population, confirming that excess adipose tissue contributes to the body mass index-acute kidney injury association. Further studies of the potential mechanisms linking adiposity with acute kidney injury are warranted.
Collapse
|
38
|
Ishihara S, Mizutani T, Kawabata K, Haga H. An improved method for western blotting when extracting proteins from mammalian cells cultured on a collagen gel under serum-free conditions. Cytotechnology 2014; 68:25-32. [PMID: 25005915 DOI: 10.1007/s10616-014-9766-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 06/28/2014] [Indexed: 11/24/2022] Open
Abstract
Western blotting is a widely used method for detection and quantification of specific proteins extracted from mammalian cells. In the conventional method of protein extraction, we found that collagen-containing gels interfered with detection of the p65 protein (one of the subunits in the NF-κB family of proteins) in human lung adenocarcinoma A549 cells cultured on a collagen gel containing serum. In contrast, the collagen gels did not affect detection of the GAPDH protein. Then, we established an improved method for preparation of protein extracts (using trichloroacetic acid fixation and collagenase treatment) from the cells cultured on the collagen gel. Using the improved method, we were able to detect p65 proteins without loss in A549 cells cultured on a collagen gel under serum-free conditions, but we could not detect the proteins if serum was present in cell culture. Thus, using western blotting and serum-free culture conditions, we succeeded in comparing the p65 expression between the cells grown in a plastic dish and cells grown on a collagen gel.
Collapse
Affiliation(s)
- Seiichiro Ishihara
- Transdisciplinary Life Science Course, Faculty of Advanced Life Science, Hokkaido University, N10-W8, Kita-ku, Sapporo, 060-0810, Japan
- Research Center for Cooperative Projects, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Takeomi Mizutani
- Transdisciplinary Life Science Course, Faculty of Advanced Life Science, Hokkaido University, N10-W8, Kita-ku, Sapporo, 060-0810, Japan
| | - Kazushige Kawabata
- Transdisciplinary Life Science Course, Faculty of Advanced Life Science, Hokkaido University, N10-W8, Kita-ku, Sapporo, 060-0810, Japan
| | - Hisashi Haga
- Transdisciplinary Life Science Course, Faculty of Advanced Life Science, Hokkaido University, N10-W8, Kita-ku, Sapporo, 060-0810, Japan.
- Research Center for Cooperative Projects, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
| |
Collapse
|
39
|
Komers R. Rho kinase inhibition in diabetic kidney disease. Br J Clin Pharmacol 2014; 76:551-9. [PMID: 23802580 DOI: 10.1111/bcp.12196] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 06/20/2013] [Indexed: 02/06/2023] Open
Abstract
Small GTPases of the Rho family and their down-stream effectors Rho associated kinases (ROCKs) are the molecules that converge a spectrum of pathophysiological signals triggered by the diabetic milieu and represent promising molecular targets for nephroprotective treatment in diabetes. The review discusses recent studies exploring the consequences of diabetes-induced Rho-ROCK activation in the kidney and the effects of ROCK inhibition (ROCKi) in experimental diabetic kidney disease (DKD). Studies in models of type 1 and type 2 diabetes have indicated blood pressure-independent nephroprotective actions of ROCKi in DKD. The underlying mechanisms include attenuation of diabetes-induced increases in renal expression of prosclerotic cytokines and extracellular matrix, anti-oxidant effects and protection of mitochondrial function, resulting in slower development of glomerulosclerosis and interstitial fibrosis. The studies have also shown antiproteinuric effects of ROCKi that could be related to reductions in permeability of the glomerular barrier and beneficial effects on podocytes. Glomerular haemodynamic mechanisms might also be involved. Despite remaining questions in this field, such as the effects in podocytes later in the course of DKD, specificity of currently available ROCKi, or the roles of individual ROCK isoforms, recent evidence in experimental diabetes suggests that ROCKi might in future broaden the spectrum of treatments available for patients with DKD. This is supported by the evidence generated in models of non-diabetic kidney disease and in clinical studies in patients with various cardiovascular disorders.
Collapse
Affiliation(s)
- Radko Komers
- Division of Nephrology and Hypertension, Oregon Health and Science University, Portland, OR, USA
| |
Collapse
|
40
|
Lee AH, Dhaliwal R, Kantores C, Ivanovska J, Gosal K, McNamara PJ, Letarte M, Jankov RP. Rho-kinase inhibitor prevents bleomycin-induced injury in neonatal rats independent of effects on lung inflammation. Am J Respir Cell Mol Biol 2014; 50:61-73. [PMID: 23947621 DOI: 10.1165/rcmb.2013-0131oc] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Bleomycin-induced lung injury is characterized in the neonatal rat by inflammation dominated by neutrophils and macrophages, inhibited distal airway and vascular development, and pulmonary hypertension, similar to human infants with severe bronchopulmonary dysplasia. Rho-kinase (ROCK) is known to mediate lung injury in adult animals via stimulatory effects on inflammation. We therefore hypothesized that inhibition of ROCK may ameliorate bleomycin-induced lung injury in the neonatal rat. Pups received daily intraperitoneal bleomycin or saline from Postnatal Days 1 through 14 with or without Y-27632, a ROCK inhibitor. Treatment with Y-27632 prevented bleomycin-induced pulmonary hypertension, as evidenced by normalized pulmonary vascular resistance, decreased right-ventricular hypertrophy, and attenuated remodeling of pulmonary resistance arteries. Bleomycin-induced changes in distal lung architecture, including septal thinning, inhibited alveolarization, and decreased numbers of peripheral arteries and capillaries, were partially or completely normalized by Y-27632. Treatment with Y-27632 or a CXCR2 antagonist, SB265610, also abrogated tissue neutrophil influx, while having no effect on macrophages. However, treatment with SB265610 did not prevent bleomycin-induced lung injury. Lung content of angiostatic thrombospondin-1 (TSP1) was increased significantly in the lungs of bleomycin-exposed animals, and was completely attenuated by treatment with Y-27632. Thrombin-stimulated TSP1 production by primary cultured rat pulmonary artery endothelial cells was also attenuated by Y-27632. Taken together, our findings suggest a preventive effect of Y-27632 on bleomycin-mediated injury by a mechanism unrelated to inflammatory cells. Our data suggest that improvements in lung morphology may have been related to indirect stimulatory effects on angiogenesis via down-regulation of TSP1.
Collapse
|
41
|
Suh SH, Lee KE, Kim IJ, Kim O, Kim CS, Choi JS, Choi HI, Bae EH, Ma SK, Lee JU, Kim SW. Alpha-lipoic acid attenuates lipopolysaccharide-induced kidney injury. Clin Exp Nephrol 2014; 19:82-91. [PMID: 24643788 DOI: 10.1007/s10157-014-0960-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 03/04/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND Kidney is one of the major target organs in sepsis, while effective prevention of septic acute kidney injury has not yet been established. α-Lipoic acid (LA) has been known to exert beneficial effects against lipopolysaccharide (LPS)-induced damages in various organs such as heart, lung, and liver. We investigated the protective effect of LA on LPS-induced kidney injury. METHODS Two groups of rats were treated with LPS (20 mg/kg, i.p.), one of which being co-treated with LA (50 mg/kg), while the control group was treated with vehicle alone. Human renal proximal tubular epithelial cells (HK-2 cells) were cultured with or without LPS (10 μg/ml) in the presence or absence of LA (100 μg/ml) for 3 h prior to LPS treatment. RESULTS Serum creatinine level was increased in LPS-treated rats, which was attenuated by LA co-treatment. LPS treatment induced cleaved caspase-3 expression in the kidney, which was counteracted by LA. Terminal deoxynucleotidyl transferase dUTP nick-end labeling-positive cells increased in the kidneys of LPS-treated rats compared with controls, which was counteracted by LA treatment. Protein expression of inducible nitric oxide synthase and cyclooxygenase-2 detected by immunoblotting and/or immunohistochemical staining, along with mRNA levels of pro-inflammatory cytokines detected by real-time polymerase chain reaction, was increased in the kidney with LPS administration, which was ameliorated with LA treatment. LA also protected LPS-induced tubular dysfunction, preserving type 3 Na(+)/H(+) exchanger and aquaporin 2 expressions in the kidney. Suppression of LPS-induced expression of cleaved caspase-3 by LA was also observed in HK-2 cells. Increased protein expression of phospho-extracellular signal-regulated kinases 1/2 and c-Jun N-terminal kinases by LPS treatment was attenuated by LA pretreatment, while p38 was not affected by either LPS or LA treatment. MitoTracker Red demonstrated LA prevented LPS-induced increment of mitochondrial oxidative stress, where concurrent 4',6-diamidino-2-phenylindole staining also revealed marked fragmentation and condensation of nuclei in HK-2 cells treated with LPS, which was prevented by LA. CONCLUSION LA treatment attenuates LPS-induced kidney injury, such as renal tubular dysfunction, by suppression of apoptosis, and inflammation.
Collapse
Affiliation(s)
- Sang Heon Suh
- Department of Internal Medicine, Chonnam National University Medical School, 42 Jebongro, Gwangju, 501-757, Korea
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Han NR, Kim HM, Jeong HJ. The β-sitosterol attenuates atopic dermatitis-like skin lesions through down-regulation of TSLP. Exp Biol Med (Maywood) 2014; 239:454-64. [PMID: 24510054 DOI: 10.1177/1535370213520111] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The compound β-sitosterol (BS) is one of the most common forms of phytosterols and has anti-cancer, anti-oxidant, anti-bacterial, and anti-inflammatory effects. However, the effect of BS on atopic dermatitis (AD) has not been elucidated. Therefore, we investigated whether BS would be an effective treatment against AD. We treated BS on 2,4-dinitrofluorobenzene (DNFB)-induced AD-like skin lesions in NC/Nga mice, anti-CD3/anti-CD28-stimulated splenocytes, and phorbol myristate acetate/calcium ionophore A23187-stimulated human mast cell line (HMC-1) cells. Histological analysis, ELISA, PCR, caspase-1 assay, and Western blot analysis were performed. BS reduced the total clinical severity in DNFB-treated NC/Nga mice. Infiltration of inflammatory cells and number of scratching were clearly reduced in the BS-treated group compared with the DNFB-treated group. BS significantly reduced the levels of inflammation-related mRNA and protein in the AD skin lesions. BS significantly reduced the levels of histamine, IgE, and interleukin-4 in the serum of DNFB-treated NC/Nga mice. The activation of mast cell-derived caspase-1 was decreased by treatment with BS in the AD skin lesions. BS also significantly decreased the production of tumor necrosis factor-α from the stimulated splenocytes. In the stimulated human mast cell line, HMC-1 cells, increased intracellular calcium levels were decreased by treatment with BS. Further, BS inhibited the production and mRNA expression of TSLP through blocking of caspase-1 and nuclear factor-κB signal pathways in the stimulated HMC-1 cells. These results provide additional evidence that BS may be considered an effective therapeutic drug for the treatment of AD.
Collapse
Affiliation(s)
- Na-Ra Han
- Department of Pharmacology, College of Korean Medicine, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | | | | |
Collapse
|
43
|
Tryptanthrin ameliorates atopic dermatitis through down-regulation of TSLP. Arch Biochem Biophys 2014; 542:14-20. [DOI: 10.1016/j.abb.2013.11.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 11/05/2013] [Accepted: 11/24/2013] [Indexed: 12/28/2022]
|
44
|
Suh SH, Lee KE, Park JW, Kim IJ, Kim O, Kim CS, Choi JS, Bae EH, Ma SK, Lee JU, Kim SW. Antiapoptotic Effect of Paricalcitol in Gentamicin-induced Kidney Injury. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2013; 17:435-40. [PMID: 24227945 PMCID: PMC3823957 DOI: 10.4196/kjpp.2013.17.5.435] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 09/15/2013] [Accepted: 09/17/2013] [Indexed: 01/26/2023]
Abstract
While the anti-apoptotic effect of paricalcitol has been demonstrated in various animal models, it is not yet clear whether paricalcitol attenuates the apoptosis in gentamicin (GM)-induced kidney injury. We investigated the effect of paricalcitol on apoptotic pathways in rat kidneys damaged by GM. Rats were randomly divided into three groups: 1) Control group (n=8), where only vehicle was delivered, 2) GM group (n=10), where rats were treated with GM (150 mg/kg/day) for 7 days, 3) PARI group (n=10), where rats were co-treated with paricalcitol (0.2 µg/kg/day) and GM for 7 days. Paricalcitol attenuated renal dysfunction by GM administration in biochemical profiles. In terminal deoxynucleotidyl transferase dUTP nick end labeling staining, increased apoptosis was observed in GM group, which was reversed by paricalcitol co-treatment. Immunoblotting using protein samples from rat cortex/outer stripe of outer medulla showed increased Bax/Bcl-2 ratio and cleaved form of caspase-3 in GM group, both of which were reversed by paricalcitol. The phosphorylated Jun-N-terminal kinase (JNK) expression was increase in GM, which was counteracted by paricalcitol. The protein expression of p-Akt and nitro-tyrosine was also enhanced in GM-treated rats compared with control rats, which was reversed by paricalcitol co-treatment. Paricalcitol protects GM-induced renal injury by antiapoptotic mechanisms, including inhibition of intrinsic apoptosis pathway and JNK.
Collapse
Affiliation(s)
- Sang Heon Suh
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju 501-757, Korea
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Ishihara S, Yasuda M, Harada I, Mizutani T, Kawabata K, Haga H. Substrate stiffness regulates temporary NF-κB activation via actomyosin contractions. Exp Cell Res 2013; 319:2916-27. [PMID: 24113574 DOI: 10.1016/j.yexcr.2013.09.018] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 09/16/2013] [Accepted: 09/21/2013] [Indexed: 01/01/2023]
Abstract
Physical properties of the extracellular matrix (ECM) can control cellular phenotypes via mechanotransduction, which is the process of translation of mechanical stresses into biochemical signals. While current research is clarifying the relationship between mechanotransduction and cytoskeleton or adhesion complexes, the contribution of transcription factors to mechanotransduction is not well understood. The results of this study revealed that the transcription factor NF-κB, a major regulator for immunoreaction and cancer progression, is responsive to substrate stiffness. NF-κB activation was temporarily induced in H1299 lung adenocarcinoma cells grown on a stiff substrate but not in cells grown on a soft substrate. Although the activation of NF-κB was independent of the activity of integrin β1, an ECM-binding protein, the activation was dependent on actomyosin contractions induced by phosphorylation of myosin regulatory light chain (MRLC). Additionally, the inhibition of MRLC phosphorylation by Rho kinase inhibitor Y27632 reduced the activity of NF-κB. We also observed substrate-specific morphology of the cells, with cells grown on the soft substrate appearing more rounded and cells grown on the stiff substrate appearing more spread out. Inhibiting NF-κB activation caused a reversal of these morphologies on both substrates. These results suggest that substrate stiffness regulates NF-κB activity via actomyosin contractions, resulting in morphological changes.
Collapse
Affiliation(s)
- Seiichiro Ishihara
- Transdisciplinary Life Science Course, Faculty of Advanced Life Science, Hokkaido University, N10-W8, Kita-ku, Sapporo 060-0810, Japan
| | | | | | | | | | | |
Collapse
|
46
|
Eadon MT, Hack BK, Alexander JJ, Xu C, Dolan ME, Cunningham PN. Cell cycle arrest in a model of colistin nephrotoxicity. Physiol Genomics 2013; 45:877-88. [PMID: 23922129 DOI: 10.1152/physiolgenomics.00076.2013] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Colistin (polymixin E) is an antibiotic prescribed with resurging frequency for multidrug resistant gram negative bacterial infections. It is associated with nephrotoxicity in humans in up to 55% of cases. Little is known regarding genes involved in colistin nephrotoxicity. A murine model of colistin-mediated kidney injury was developed. C57/BL6 mice were administered saline or colistin at a dose of 16 mg/kg/day in 2 divided intraperitoneal doses and killed after either 3 or 15 days of colistin. After 15 days, mice exposed to colistin had elevated blood urea nitrogen (BUN), creatinine, and pathologic evidence of acute tubular necrosis and apoptosis. After 3 days, mice had neither BUN elevation nor substantial pathologic injury; however, urinary neutrophil gelatinase-associated lipocalin was elevated (P = 0.017). An Illumina gene expression array was performed on kidney RNA harvested 72 h after first colistin dose to identify differentially expressed genes early in drug treatment. Array data revealed 21 differentially expressed genes (false discovery rate < 0.1) between control and colistin-exposed mice, including LGALS3 and CCNB1. The gene signature was significantly enriched for genes involved in cell cycle proliferation. RT-PCR, immunoblot, and immunostaining validated the relevance of key genes and proteins. This murine model offers insights into the potential mechanism of colistin-mediated nephrotoxicity. Further studies will determine whether the identified genes play a causative or protective role in colistin-induced nephrotoxicity.
Collapse
Affiliation(s)
- Michael T Eadon
- Divisions of Nephrology and Clinical Pharmacology, Indiana University, Indianapolis, Indiana
| | | | | | | | | | | |
Collapse
|
47
|
Bourgine PE, Pippenger BE, Todorov A, Tchang L, Martin I. Tissue decellularization by activation of programmed cell death. Biomaterials 2013; 34:6099-108. [DOI: 10.1016/j.biomaterials.2013.04.058] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 04/27/2013] [Indexed: 01/10/2023]
|
48
|
TNF-mediated damage to glomerular endothelium is an important determinant of acute kidney injury in sepsis. Kidney Int 2013; 85:72-81. [PMID: 23903370 PMCID: PMC3834073 DOI: 10.1038/ki.2013.286] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 04/30/2013] [Accepted: 05/23/2013] [Indexed: 12/15/2022]
Abstract
Severe sepsis is often accompanied by acute kidney injury (AKI) and albuminuria. Here we studied whether the AKI and albuminuria associated with lipopolysaccharide (LPS) treatment in mice reflects impairment of the glomerular endothelium with its associated endothelial surface layer. LPS treatment decreased the abundance of endothelial surface layer heparan sulfate proteoglycans and sialic acid, and led to albuminuria likely reflecting altered glomerular filtration permselectivity. LPS treatment decreased the glomerular filtration rate (GFR), while also causing significant ultrastructural alterations in the glomerular endothelium. The density of glomerular endothelial cell fenestrae was 5-fold lower, whereas the average fenestrae diameter was 3-fold higher in LPS-treated than in control mice. The effects of LPS on the glomerular endothelial surface layer, endothelial cell fenestrae, GFR, and albuminuria were diminished in TNF receptor 1 (TNFR1) knockout mice, suggesting that these LPS effects are mediated by TNF-α activation of TNFR1. Indeed, intravenous administration of TNF decreased GFR and led to loss of glomerular endothelial cell fenestrae, increased fenestrae diameter, and damage to the glomerular endothelial surface layer. LPS treatment decreased kidney expression of vascular endothelial growth factor (VEGF). Thus, our findings confirm the important role of glomerular endothelial injury, possibly by a decreased VEGF level, in the development and progression of AKI and albuminuria in the LPS model of sepsis in the mouse.
Collapse
|
49
|
Zhou Z, Guo F, Dou Y, Tang J, Huan J. Guanine nucleotide exchange factor-H1 signaling is involved in lipopolysaccharide-induced endothelial barrier dysfunction. Surgery 2013; 154:621-31. [PMID: 23859306 DOI: 10.1016/j.surg.2013.04.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 04/03/2013] [Indexed: 12/23/2022]
Abstract
BACKGROUND Gram-negative bacterial lipopolysaccharide (LPS) leads to the pathologic increase of vascular leakage under septic conditions. However, the mechanisms behind LPS-induced vascular hyperpermeability remain incompletely understood. In this study, we tested hypothesis that guanine nucleotide exchange factor-H1 (GEF-H1) signaling might be a key pathway involved in endothelial cells (ECs) barrier dysfunction. METHODS The roles of GEF-H1 signaling pathway in LPS-induced ECs barrier dysfunction were accessed by Evans blue dye-labeled albumin (EB-albumin) leak across the human umbilical vein EC (HUVEC) monolayers and Western blot assays. Furthermore, the effect of GEF-H1 signaling on LPS-induced alteration of cytoskeletal proteins and disruption of cell-cell junctions were analyzed by immunofluorescent analysis and Western blot assays, respectively. RESULTS We found that LPS could rapidly activated GEF-H1/RhoA/Rho-associated protein kinase (ROCK) signaling pathway in ECs. The LPS-mediated increase in EB-albumin flux across human HUVECs monolayers could be prevented by GEF-H1 depletion or ROCK inactivation. ECs permeability is controlled by actin filaments and cell-cell contact protein complexes. Actin stress fiber formation and/or cell-cell contact proteins loss cause vascular barrier disruption. Here, GEF-H1 knockdown or ROCK inactivation both not only significantly inhibited LPS-induced actin stress fiber formation, phosphorylation of myosin light chain, and myosin-associated phosphatase type 1, but also suppressed LPS-induced loss of occludin, claudin-1, and vascular endothelial (VE)-cadherin in ECs, which suggested that LPS-induced stress fiber formation and cell-cell junctions disruption were closely associated with GEF-H1/RhoA/ROCK signaling activation. CONCLUSION Our findings indicate that GEF-H1/RhoA/ROCK pathway in ECs plays an important role in LPS-mediated alteration of cell morphology and disruption of cell-cell junctions, consequently regulate LPS-induced vascular permeability dysfunction.
Collapse
Affiliation(s)
- Zengding Zhou
- Department of Burn and Plastic Surgery, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | | | | | | | | |
Collapse
|
50
|
Zhu XY, Urbieta-Caceres V, Krier JD, Textor SC, Lerman A, Lerman LO. Mesenchymal stem cells and endothelial progenitor cells decrease renal injury in experimental swine renal artery stenosis through different mechanisms. Stem Cells 2013; 31:117-25. [PMID: 23097349 DOI: 10.1002/stem.1263] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 09/07/2012] [Accepted: 09/23/2012] [Indexed: 12/28/2022]
Abstract
Endothelial progenitor cells (EPC) and mesenchymal stem cells (MSC) augment tissue repair but possess slightly different properties. How the cellular phenotype affects the efficacy of this approach in renovascular disease is incompletely understood. This study tested the hypothesis that EPC and MSC protect the poststenotic kidney by blunting different disease pathways. Peripheral blood EPC and adipose-derived MSC were expanded and characterized by cell surface markers (e.g., CD34/kinase insert domain receptor, or CD44/CD90). Single-kidney hemodynamics and function were assessed in pigs after 10 weeks of renal artery stenosis (RAS) treated 4 weeks earlier with an intrarenal infusion of vehicle (n = 7), EPC (RAS+EPC) or MSC (RAS+MSC) (both 10 × 10(6), n = 6), and normal controls (n = 7). Kidney disease mechanisms were evaluated ex vivo. The ability of EPC and MSC to attenuate endoplasmic reticulum (ER) stress was also studied in isolated ER and in tubular cells cocultured with EPC and MSC. Glomerular filtration rate in RAS was lower than controls, increased in RAS+EPC, and further improved in RAS+MSC, although both improved renal blood flow similarly. EPC prominently enhanced renal growth factor expression and decreased oxidative stress, while MSC more significantly attenuated renal inflammation, ER stress, and apoptosis. Furthermore, MSC induced a greater decrease in caspase-3 and CHOP expression in cultured tubular cells through mechanisms involving cell contact. EPC and MSC achieve a comparable decrease of kidney injury in RAS by different mechanisms, although MSC elicited slightly superior improvement of renal function. These results support development of cell-based approaches for management of renovascular disease and suggest cell selection based on the underlying pathophysiology of kidney injury.
Collapse
Affiliation(s)
- Xiang-Yang Zhu
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota 55905, USA
| | | | | | | | | | | |
Collapse
|