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Alghamdi AH, El-Sherbini SM, Shatla IM, Mady EA, El-Refaei MF. Impacts of circulating cytokine levels and gene polymorphism predisposition on type 1 diabetes mellitus. Ann Pediatr Endocrinol Metab 2024; 29:250-257. [PMID: 39231486 PMCID: PMC11374510 DOI: 10.6065/apem.2346178.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 04/23/2024] [Indexed: 09/06/2024] Open
Abstract
PURPOSE A wide range of cytokines has been demonstrated to be involved in the etiology of type 1 diabetes mellitus (T1DM). Gene polymorphisms may potentially contribute to a hereditary predisposition toward circulating cytokine levels as (high, intermediate, or low) since they can affect cytokine production or function. The aim of this study was to investigate the roles of cytokine levels and the association of single-nucleotide polymorphisms (SNPs) within cytokine genes with T1DM in Saudi children. METHODS Totals of 91 well-characterized T1DM patients and 91 T1DM-free control subjects were enrolled in this study. RESULTS The levels of 3 circulating cytokines (transforming growth factor [TGF]-β1, interleukin [IL]-10, and IL-6) and 6 SNPs in 3 cytokine genes (TGF-β1 [rs1800470 and rs1800471], IL-10 [rs1800896, rs1800871, and rs1800872], and IL-6 [rs1800795]) that contribute to genetic susceptibility were measured by enzyme-linked immunosorbent assay and polymerase chain reaction with sequence-specific primers. Our fn dings show that TGF-β1 serum levels were signifcantly lower in the children with T1DM than in the control participants. The TGF-β1 genotypes with a high-production phenotype were signifcantly less frequent and those with a lowproduction phenotype were signifcantly more frequent in the children with T1DM compared to the control participants. respectively. Furthermore, the IL-6 genotype frequency with low level of IL-6 production were signifcantly increased in the T1DM group compared to the control group. Moreover, our data demonstrated no appreciable diferences in circulating serum level or genotype and phenotype of IL- 10 between the patients and controls. CONCLUSION This kind of measurement, which considers the prediction of T1DM, may be useful in assessing the severity of T1DM and susceptibility to T1DM among Saudi children.
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Affiliation(s)
| | - Sherif M El-Sherbini
- Faculty of Science, Al-Baha University, Al-Baha, Saudi Arabia
- Genetic Institute, Sadat City University, Egypt
| | - Ibrahim M Shatla
- Faculty of Medicine, Al-Baha University, Al-Baha, Saudi Arabia
- Demietta Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Essam A Mady
- Faculty of Medicine, Al-Baha University, Al-Baha, Saudi Arabia
| | - Mohamed F El-Refaei
- Faculty of Medicine, Al-Baha University, Al-Baha, Saudi Arabia
- Genetic Institute, Sadat City University, Egypt
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Chen J, Zhang Q, Guo J, Gu D, Liu J, Luo P, Bai Y, Chen J, Zhang X, Nie S, Chen C, Feng Y, Wang J. Single-cell transcriptomics reveals the ameliorative effect of rosmarinic acid on diabetic nephropathy-induced kidney injury by modulating oxidative stress and inflammation. Acta Pharm Sin B 2024; 14:1661-1676. [PMID: 38572101 PMCID: PMC10985035 DOI: 10.1016/j.apsb.2024.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/11/2023] [Accepted: 01/04/2024] [Indexed: 04/05/2024] Open
Abstract
Diabetic nephropathy (DN) is a severe complication of diabetes, characterized by changes in kidney structure and function. The natural product rosmarinic acid (RA) has demonstrated therapeutic effects, including anti-inflammation and anti-oxidative-stress, in renal damage or dysfunction. In this study, we characterized the heterogeneity of the cellular response in kidneys to DN-induced injury and RA treatment at single cell levels. Our results demonstrated that RA significantly alleviated renal tubular epithelial injury, particularly in the proximal tubular S1 segment and on glomerular epithelial cells known as podocytes, while attenuating the inflammatory response of macrophages, oxidative stress, and cytotoxicity of natural killer cells. These findings provide a comprehensive understanding of the mechanisms by which RA alleviates kidney damage, oxidative stress, and inflammation, offering valuable guidance for the clinical application of RA in the treatment of DN.
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Affiliation(s)
- Junhui Chen
- National Pharmaceutical Engineering Center for Solid Preparation of Chinese Herbal Medicine, Jiangxi University of Chinese Medicine, Nanchang 330006, China
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, and Shenzhen Clinical Research Centre for Geriatrics, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen 518020, China
| | - Qian Zhang
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, and Shenzhen Clinical Research Centre for Geriatrics, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen 518020, China
- School of Traditional Chinese Medicine and School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jinan Guo
- Department of Urology, and Shenzhen Clinical Research Centre for Geriatrics, Shenzhen People's Hospital, the First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, China
| | - Di Gu
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China
| | - Jing Liu
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, and Shenzhen Clinical Research Centre for Geriatrics, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen 518020, China
| | - Piao Luo
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, and Shenzhen Clinical Research Centre for Geriatrics, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen 518020, China
- School of Traditional Chinese Medicine and School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Yunmeng Bai
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, and Shenzhen Clinical Research Centre for Geriatrics, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen 518020, China
| | - Jiayun Chen
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, and Shenzhen Clinical Research Centre for Geriatrics, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen 518020, China
- School of Traditional Chinese Medicine and School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Xinzhou Zhang
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, and Shenzhen Clinical Research Centre for Geriatrics, Shenzhen People's Hospital, the First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, China
| | - Sheng Nie
- Department of Nephrology, Nanfang Hospital, the First Affiliated Hospital of Southern Medical University, Guangzhou 510515, China
| | - Chunbo Chen
- Department of Critical Care Medicine, Shenzhen People's Hospital (the Second Clinical Medical College, Jinan University, the First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - Yulin Feng
- National Pharmaceutical Engineering Center for Solid Preparation of Chinese Herbal Medicine, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Jigang Wang
- National Pharmaceutical Engineering Center for Solid Preparation of Chinese Herbal Medicine, Jiangxi University of Chinese Medicine, Nanchang 330006, China
- Department of Pulmonary and Critical Care Medicine, Shenzhen Institute of Respiratory Diseases, and Shenzhen Clinical Research Centre for Geriatrics, Shenzhen People's Hospital, First Affiliated Hospital of Southern University of Science and Technology, Second Clinical Medical College of Jinan University, Shenzhen 518020, China
- School of Traditional Chinese Medicine and School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
- State Key Laboratory for Quality Esurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
- Department of Oncology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
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Metformin suppresses LRG1 and TGFβ1/ALK1-induced angiogenesis and protects against ultrastructural changes in rat diabetic nephropathy. Biomed Pharmacother 2023; 158:114128. [PMID: 36525822 DOI: 10.1016/j.biopha.2022.114128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/04/2022] [Accepted: 12/11/2022] [Indexed: 12/15/2022] Open
Abstract
Diabetic nephropathy (DN) has high prevalence and poor prognosis which make it a research priority for scientists. Since metformin, a hypoglycaemic drug, has been found to prolong the survival of mice with DN. This study aims at investigating the molecular mechanisms leading to DN in rats and to explore the role of leucine-rich α-2-glycoprotein-1 (LRG1), activin-like kinase1 (ALK1), and transforming growth factor-β (TGFβ1) in the pathologic alterations seen in DN. The aim was also extended to explore the protective action of metformin against DN in rats and its influence on LRG1and ALK1/TGFβ1 induced renal angiogenesis. 24 male rats were used. Rats were assigned as, the vehicle group, the diabetic control group and diabetic + metformin (100 and 200 mg/kg) groups. Kidney samples were processed for histopathology, immunohistochemistry and biochemical analysis. Bioinformatic analysis of studied proteins was done to determine protein-protein interactions. Metformin reduced serum urea and creatinine significantly, decreased the inflammatory cytokine levels and reduced LRG1, TGFβ1, ALK1 and vascular endothelial growth factor (VEGF) proteins in rat kidneys. Bioinformatic analysis revealed interactions between the studied proteins. Metformin alleviated the histopathological changes observed in the diabetic rats such as the glomerular surface area and increased Bowman's space diameter. Metformin groups showed decreased VEGF immunostaining compared to diabetic group. Metformin shows promising renoprotective effects in diabetic model that was at least partly mediated by downregulation of LRG1 and TGFβ1/ALK1-induced renal angiogenesis. These results further explain the molecular mechanism of metformin in DN management.
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Sereno AB, Dayane Pinto C, Antunes Andrade F, Aparecida Bertolazo da Silva M, Carvalho Garcia A, Carneiro Hecke Krüger C, José de Messias Reason I. Effects of okra (Abelmoschus esculentus (L.) Moench) on glycemic markers in animal models of diabetes: A systematic review. JOURNAL OF ETHNOPHARMACOLOGY 2022; 298:115544. [PMID: 35963420 DOI: 10.1016/j.jep.2022.115544] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 07/06/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Okra (Abelmoschus esculentus (L.) Moench) is traditionally used by different populations of Africa, América, Asia, and Europa to control diabetes. Although its action has been evaluated in several preclinical rodent trials, they have not been systematically analyzed. OBJECTIVE To evaluate the effectiveness of using okra in the treatment of diabetes in experimental rodent models. MATERIAL AND METHODS Controlled and randomized rodent animal trials with induced diabetes published between January 2000 and January 2021 were searched in the PubMed, Scopus, Scielo, and Web of Science databases. The search strategy included studies comprising the descriptors: animal species, diabetes induction method, intervention time, part of okra fruit used (whole, seeds, or peels), and dose as well as observed effects on biochemical and metabolic parameters. The systematic review was carried out according to the PRISMA statement, Cochrane bias risk tool (SYRCLE's RoB tool), and registered for systematic review protocols (PROSPERO). RESULTS A total of 326 articles were identified and after the exclusion of studies with gestational animal models, non-rodent animals, and non-diabetic animals, 11 studies involving 388 rodents were selected for the synthesis of results. The diabetes induction methods included streptozotocin, streptozotocin-nicotinamide, alloxan monohydrate, insulin resistance by high-fat diets or formulation described in AIN - 76, and feeding with high-fat food. Both Wistar albino rats, Sprague-Dawley males, and rats of both sexes of the Long-Evans lineage as well as male albino mice and C57BL females were included in the experiments. Studies showed that extracts of the fruit, the fresh fruit, or its various fractions had positive effects on the following markers: glycated hemoglobin, cholesterol, HOMA-IR, oral glucose tolerance test, and blood glucose, in acute (2 and 24 h), and chronic (up to 4 months) treatment. CONCLUSION An important hypoglycemic effect of okra in its various fractions on induced diabetes was observed by different authors. Moreover, okra promoted improvement in metabolic markers such as insulin sensitivity, lipid profile, and bodyweight loss.
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Affiliation(s)
- Aiane Benevide Sereno
- Postgraduate Program in Internal Medicine and Health Sciences, Federal University of Paraná (UFPR), R. Padre Camargo, 280, 80.069-900, Curitiba, Paraná, Brazil.
| | - Carla Dayane Pinto
- Postgraduate Program in Internal Medicine and Health Sciences, Federal University of Paraná (UFPR), R. Padre Camargo, 280, 80.069-900, Curitiba, Paraná, Brazil.
| | - Fabiana Antunes Andrade
- Laboratory of Molecular Immunopathology, Clinic Hospital, Federal University of Paraná (UFPR), R. Padre Camargo, 280, 80.069-900, Curitiba, Paraná, Brazil; Department of Medicine, Positive University (UP), R. Pedro Viriato Parigot de Souza, 5300, 81280-330, Curitiba, Paraná, Brazil.
| | - Michelli Aparecida Bertolazo da Silva
- Postgraduate Program in Internal Medicine and Health Sciences, Federal University of Paraná (UFPR), R. Padre Camargo, 280, 80.069-900, Curitiba, Paraná, Brazil; Tuiuti University of Paraná (UTP), R. Sydnei Antonio Rangel Santos, 238 - Santo Inacio, 82010-330, Curitiba, Paraná, Brazil.
| | - Amanda Carvalho Garcia
- Postgraduate Program in Internal Medicine and Health Sciences, Federal University of Paraná (UFPR), R. Padre Camargo, 280, 80.069-900, Curitiba, Paraná, Brazil.
| | - Cláudia Carneiro Hecke Krüger
- Postgraduate Program in Food and Nutrition, Federal University of Paraná (UFPR), Av. Lothário Meissner, 632, 80.210-170, Curitiba, Paraná, Brazil.
| | - Iara José de Messias Reason
- Postgraduate Program in Internal Medicine and Health Sciences, Federal University of Paraná (UFPR), R. Padre Camargo, 280, 80.069-900, Curitiba, Paraná, Brazil; Laboratory of Molecular Immunopathology, Clinic Hospital, Federal University of Paraná (UFPR), R. Padre Camargo, 280, 80.069-900, Curitiba, Paraná, Brazil.
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Akhlaghipour I, Bina AR, Mogharrabi MR, Fanoodi A, Ebrahimian AR, Khojasteh Kaffash S, Babazadeh Baghan A, Khorashadizadeh ME, Taghehchian N, Moghbeli M. Single-nucleotide polymorphisms as important risk factors of diabetes among Middle East population. Hum Genomics 2022; 16:11. [PMID: 35366956 PMCID: PMC8976361 DOI: 10.1186/s40246-022-00383-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/23/2022] [Indexed: 12/16/2022] Open
Abstract
Diabetes is a chronic metabolic disorder that leads to the dysfunction of various tissues and organs, including eyes, kidneys, and cardiovascular system. According to the World Health Organization, diabetes prevalence is 8.8% globally among whom about 90% of cases are type 2 diabetes. There are not any significant clinical manifestations in the primary stages of diabetes. Therefore, screening can be an efficient way to reduce the diabetic complications. Over the recent decades, the prevalence of diabetes has increased alarmingly among the Middle East population, which has imposed exorbitant costs on the health care system in this region. Given that the genetic changes are among the important risk factors associated with predisposing people to diabetes, we examined the role of single-nucleotide polymorphisms (SNPs) in the pathogenesis of diabetes among Middle East population. In the present review, we assessed the molecular pathology of diabetes in the Middle East population that paves the way for introducing an efficient SNP-based diagnostic panel for diabetes screening among the Middle East population. Since, the Middle East has a population of 370 million people; the current review can be a reliable model for the introduction of SNP-based diagnostic panels in other populations and countries around the world.
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Workneh Fego M, Tahir Yasin J, Mamo Aga G. Knowledge, Attitude and Practice Towards Insulin-Self Administration Among Diabetic Patients Attending Bedele Hospital, Southwest Ethiopia, 2019/2020. Diabetes Metab Syndr Obes 2021; 14:1919-1925. [PMID: 33953589 PMCID: PMC8092850 DOI: 10.2147/dmso.s279186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 03/31/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Diabetes mellitus is a heterogeneous clinical syndrome secondary to defects in insulin secretion, action, or both. The worldwide fatality and disability rate imposed diabetic patients for insulin self-administration regardless of a scarcity of their knowledge, attitude, and practices. Thus, the study aimed to assess knowledge, attitude, and practice towards insulin-self administration among diabetic patients attending Bedele Hospital, southwest of Ethiopia. METHODS A facility-based cross-sectional study was conducted by a consecutive sampling technique at Bedele Hospital from 15 December 2019 to 22 January 2020. A pretested structured English version relevant questionnaire translated to local language was administered on 196 subjects. Data were tested for clarity, consistency and analyzed using The Statistical Package for Social Sciences version 23 and summarized using descriptive statistics in the form of tables and figures. RESULTS Of 196 subjects, 180 subjects participated in the study giving a response rate of 92%. The study reveals that knowledge, attitude, and practice towards insulin self-administration were 132 (67.3%), 113 (57.6%), and 123 (62.8%), receptively, which implies that good knowledge, a favorable attitude, and good practice to insulin self-administration. CONCLUSION While the patients had good knowledge, good practice, and a favorable attitude to insulin self-administration, it does not match sufficient thus, to achieve a maximum level the hospital should develop several strategies like constant information education communication.
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Affiliation(s)
- Melese Workneh Fego
- Department of Nursing, College of Public Health and Medical Sciences, Mettu University, Mettu, Ethiopia
- Correspondence: Melese Workneh Fego Mettu University, PO Box: 318, Ethiopia Email
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He Q, Bo J, Shen R, Li Y, Zhang Y, Zhang J, Yang J, Liu Y. S1P Signaling Pathways in Pathogenesis of Type 2 Diabetes. J Diabetes Res 2021; 2021:1341750. [PMID: 34751249 PMCID: PMC8571914 DOI: 10.1155/2021/1341750] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 12/24/2020] [Accepted: 01/04/2021] [Indexed: 02/06/2023] Open
Abstract
The pathogenesis of type 2 diabetes mellitus (T2DM) is very complicated. The currently well-accepted etiology is the "Ominous Octet" theory proposed by Professor Defronzo. Since presently used drugs for T2DM have limitations and harmful side effects, studies regarding alternative treatments are being conducted. Analyzing the pharmacological mechanism of biomolecules in view of pathogenesis is an effective way to assess new drugs. Sphingosine 1 phosphate (S1P), an endogenous lipid substance in the human body, has attracted increasing attention in the T2DM research field. This article reviews recent study updates of S1P, summarizing its effects on T2DM with respect to pathogenesis, promoting β cell proliferation and inhibiting apoptosis, reducing insulin resistance, protecting the liver and pancreas from lipotoxic damage, improving intestinal incretin effects, lowering basal glucagon levels, etc. With increasing research, S1P may help treat and prevent T2DM in the future.
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Affiliation(s)
- Qiong He
- Department of Endocrinology, First Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Jiaqi Bo
- Department of Second Medical College, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Ruihua Shen
- Department of Second Medical College, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Yan Li
- Department of Second Medical College, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Yi Zhang
- Department of Pharmacology, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Jiaxin Zhang
- Department of Endocrinology, First Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Jing Yang
- Department of Endocrinology, First Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Yunfeng Liu
- Department of Endocrinology, First Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
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Li Y, Li Y, Zheng S. Inhibition of NADPH Oxidase 5 (NOX5) Suppresses High Glucose-Induced Oxidative Stress, Inflammation and Extracellular Matrix Accumulation in Human Glomerular Mesangial Cells. Med Sci Monit 2020; 26:e919399. [PMID: 32012145 PMCID: PMC7020764 DOI: 10.12659/msm.919399] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Background The aim of this study was to explore the effects of NADPH oxidase 5 (NOX5) in high glucose-stimulated human glomerular mesangial cells (HMCs). Material/Methods Cells were cultured under normal glucose (NG) or high glucose (HG) conditions. Then, NOX5 siRNA was transfected into HG-treated HMCs. A Cell Counting Kit-8 assay, colony formation assay and 5-ethynyl-20-deoxyuridine (EDU) incorporation assay were applied to measure cell proliferative ability. In addition, the levels of oxidative stress factors including reactive oxygen species (ROS), malonaldehyde (MDA), NADPH, superoxide dismutase (SOD), and glutathione peroxidase (GSH-PX), inflammatory cytokines including tumor necrosis factor-alpha (TNF-α), interleukin (IL)-6, IL-1β, and monocyte chemoattractant protein-1 (MCP-1) in HMCs were detected by kits. Moreover, the expression of TLR4/NF-κB signaling and extracellular matrix (ECM) associated genes were evaluated by western blotting. Results The results revealed that the NOX5 was overexpressed in HG-treated HMCs. Silencing of NOX5 decreased proliferation of HMCs induced by HG. And NOX5 silencing alleviated the production of MDA and NADPH accompanied by an increase of SOD and GSH-PX levels. Additionally, the contents of TNF-α, IL-6, IL-1β, and MCP-1 were reduced after transfection with NOX5 siRNA. Furthermore, silencing of NOX5 deceased the expression of collagen I, collagen IV, TGF-β1, and fibronectin induced by HG stimulation. TLR4, MyD88, and phospho-NF-κB p65 expression were downregulated notably in NOX5 silencing group. Conclusions Taken together, these findings demonstrated that inhibition of NOX5 attenuated HG-induced HMCs oxidative stress, inflammation, and ECM accumulation, suggesting that NOX5 may serve as a potential therapeutic target for diabetic nephropathy (DN) treatment.
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Affiliation(s)
- Yingxin Li
- Department of Endocrinology, Second Clinical Medical College, Inner Mongolia University for Nationalities (Inner Mongolia Forestry General Hospital), Tongliao, Inner Mongolia, China (mainland)
| | - Yarong Li
- Department of Endocrinology, The Centre Hospital of Wuhan, Wuhan, Hubei, China (mainland)
| | - Shouhao Zheng
- Department of Nephrology, Taizhou First People's Hospital, Taizhou, Zhejiang, China (mainland)
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Zhu H, Zhu X, Lin H, Liu D, Dai Y, Su X, Li L. Association of Serum PSP/REG I α with Renal Function in Type 2 Diabetes Mellitus. J Diabetes Res 2020; 2020:9787839. [PMID: 32309450 PMCID: PMC7132584 DOI: 10.1155/2020/9787839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 03/07/2020] [Indexed: 12/18/2022] Open
Abstract
PURPOSE Pancreatic stone protein/regenerating protein I (PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG I. METHODS This cross-sectional study was conducted at Zhongda Hospital, affiliated with Southeast University in China. Serum PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG I. RESULTS Serum PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG IP < 0.05). The level of PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG I. CONCLUSIONS Serum PSP/REG Iα level is significantly upregulated in T2DM patients and reflects renal function in both T2DM and nondiabetic control groups. The relationship between PSP/REG Iα and eGFR suggested that PSP/REG Iα might be a potential indicator of renal dysfunction.α) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG Iα) is a secretory protein mainly detected in the pancreas. Recent studies revealed increased serum PSP/REG I.
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Affiliation(s)
- Huimin Zhu
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, No. 87 Dingjiaqiao, Nanjing, Jiangsu 210009, China
- Pancreatic Research Institute, Southeast University, China
| | - Xiangyun Zhu
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, No. 87 Dingjiaqiao, Nanjing, Jiangsu 210009, China
- Pancreatic Research Institute, Southeast University, China
| | - Hao Lin
- Pancreatic Research Institute, Southeast University, China
- Department of Clinical Science and Research, Zhongda Hospital, School of Medicine, Southeast University, No. 87 Dingjiaqiao, Nanjing, Jiangsu 210009, China
| | - Dechen Liu
- Pancreatic Research Institute, Southeast University, China
- Department of Clinical Science and Research, Zhongda Hospital, School of Medicine, Southeast University, No. 87 Dingjiaqiao, Nanjing, Jiangsu 210009, China
| | - Yu Dai
- Nanjing Foreign Language School, Nanjing, Jiangsu 210009, China
| | - Xianghui Su
- Department of Endocrinology, Changji Branch, First Affiliated Hospital of Xinjiang Medical University, Xinjiang 831100, China
| | - Ling Li
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, No. 87 Dingjiaqiao, Nanjing, Jiangsu 210009, China
- Pancreatic Research Institute, Southeast University, China
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Zhang L, Dai Q, Hu L, Yu H, Qiu J, Zhou J, Long M, Zhou S, Zhang K. Hyperoside Alleviates High Glucose-Induced Proliferation of Mesangial Cells through the Inhibition of the ERK/CREB/miRNA-34a Signaling Pathway. Int J Endocrinol 2020; 2020:1361924. [PMID: 32774360 PMCID: PMC7397715 DOI: 10.1155/2020/1361924] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/25/2020] [Accepted: 06/11/2020] [Indexed: 02/08/2023] Open
Abstract
PURPOSE Hyperoside, a flavonoid isolated from conventional medicinal herbs, has been demonstrated to exert a significant protective effect in diabetic nephropathy. This study aimed to determine the underlying mechanisms, by which hyperoside inhibits high glucose-(HG-) induced proliferation in mouse renal mesangial cells. METHODS Mouse glomerular mesangial cells line (SV40-MES13) was used to study the inhibitory effect of hyperoside on cell proliferation induced by 30 mM glucose, which was used to simulate a diabetic condition. Viable cell count was assessed using the Cell Counting Kit-8 and by the 5-ethynyl-20-deoxyuridine incorporation assay. The underlying mechanism involving miRNA-34a was further investigated by quantitative RT-PCR and transfection with miRNA-34a agomir. The phosphorylation levels of extracellular signal-regulated kinases (ERKs) and cAMP-response element-binding protein (CREB) were measured by Western blotting. The binding region and the critical binding sites of CREB in the miRNA-34a promoter were investigated by the chromatin immunoprecipitation assay and luciferase reporter assay, respectively. RESULTS We found that hyperoside could significantly decrease HG-induced proliferation of SV40-MES13 cells in a dose-dependent manner, without causing obvious cell death. In addition, hyperoside inhibited the activation of ERK pathway and phosphorylation of its downstream transcriptional factor CREB, as well as the miRNA-34a expression. We further confirmed that CREB-mediated regulation of miRNA-34a is dependent on the direct binding to specific sites in the promoter region of miRNA-34a. CONCLUSION Our cumulative results suggested that hyperoside inhibits the proliferation of SV40-MES13 cells through the suppression of the ERK/CREB/miRNA-34a signaling pathway, which provides new insight to the current investigation on therapeutic strategies for diabetic nephropathy.
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Affiliation(s)
- Le Zhang
- National Drug Clinical Trial Institution, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Qian Dai
- Center of Medical Experiment Technology, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Lanlan Hu
- National Drug Clinical Trial Institution, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Hua Yu
- Center of Medical Experiment Technology, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Jing Qiu
- Center of Medical Experiment Technology, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Jiyin Zhou
- National Drug Clinical Trial Institution, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Min Long
- Preventive Medicine Department, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Shiwen Zhou
- National Drug Clinical Trial Institution, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Kebin Zhang
- Center of Medical Experiment Technology, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
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11
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Qi H, Yao L, Liu Q. NORAD affects the progression of diabetic nephropathy through targeting miR-520h to upregulate TLR4. Biochem Biophys Res Commun 2019; 521:190-195. [PMID: 31630796 DOI: 10.1016/j.bbrc.2019.10.102] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 10/12/2019] [Indexed: 12/17/2022]
Abstract
To uncover the role of NORAD in the progression of diabetic nephropathy (DN) and the underlying mechanism. Relative levels of NORAD and TLR4 in db/m mice and db/db mice were tested. Meanwhile, their levels in glomerular mesangial cells undergoing high-level (H-MC group) or low-level (L-MC) glucose treatment were determined. Regulatory effects of NORAD and TLR4 on proliferative ability and apoptosis in SV40-MES-13 cells were assessed. The interaction in the regulatory loop NORAD/miR-520h/TLR4 was verified through dual-luciferase reporter gene assay, determination of subcellular distribution and RIP (RNA Immunoprecipitation) assay. At last, potential role of the regulatory loop NORAD/miR-520h/TLR4 in regulating DN was clarified. NORAD and TLR4 were upregulated in db/db mice and SV40-MES-13 cells in H-MC group. Overexpression of them promoted proliferative ability and inhibited apoptosis in SV40-MES-13 cells. MiR-520h was confirmed to bind NORAD and TLR4. NORAD, miR-520h and TLR4 were mainly distributed in cytoplasm, which were enriched in anti-Ago2. The regulatory loop NORAD/miR-520h/TLR4 has been demonstrated to promote the progression of DN. The regulatory loop NORAD/miR-520h/TLR4 promotes the proliferative ability and inhibits apoptosis in glomerular mesangial cells, thus aggravating the progression of DN.
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Affiliation(s)
- Huimeng Qi
- Department of General Practice, The First Hospital of China Medical University, Shenyang, China
| | - Li Yao
- Department of Nephrology, The First Hospital of China Medical University, Shenyang, China
| | - Qiang Liu
- Department of Nephrology, The First Hospital of China Medical University, Shenyang, China.
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12
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Wang G, Ouyang J, Li S, Wang H, Lian B, Liu Z, Xie L. The analysis of risk factors for diabetic nephropathy progression and the construction of a prognostic database for chronic kidney diseases. J Transl Med 2019; 17:264. [PMID: 31409386 PMCID: PMC6693179 DOI: 10.1186/s12967-019-2016-y] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 08/05/2019] [Indexed: 12/12/2022] Open
Abstract
Background Diabetic nephropathy (DN) affects about 40% of diabetes mellitus (DM) patients and is the leading cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) all over the world, especially in high- and middle-income countries. Most DN has been present for years before it is diagnosed. Currently, the treatment of DN is mainly to prevent or delay disease progression. Although many important molecules have been discovered in hypothesis-driven research over the past two decades, advances in DN management and new drug development have been very limited. Moreover, current animal/cell models could not replicate all the features of human DN, while the development of Epigenetics further demonstrates the complexity of the mechanism of DN progression. To capture the key pathways and molecules that actually affect DN progression from numerous published studies, we collected and analyzed human DN prognostic markers (independent risk factors for DN progression). Methods One hundred and fifty-one DN prognostic markers were collected manually by reading 2365 papers published between 01/01/2002 and 12/15/2018. One hundred and fifteen prognostic markers of other four common CKDs were also collected. GO and KEGG enrichment analysis was done using g:Profiler, and a relationship network was built based on the KEGG database. Tissue origin distribution was derived mainly from The Human Protein Atlas (HPA), and a database of these prognostic markers was constructed using PHP Version 5.5.15 and HTML5. Results Several pathways were significantly enriched corresponding to different end point events. It is shown that the TNF signaling pathway plays a role through the process of DN progression and adipocytokine signaling pathway is uniquely enriched in ESRD. Molecules, such as TNF, IL6, SOD2, etc. are very important for DN progression, among which, it seems that “AGER” plays a pivotal role in the mechanism. A database, dbPKD, was constructed containing all the collected prognostic markers. Conclusions This study developed a database for all prognostic markers of five common CKDs, offering some bioinformatics analyses of DN prognostic markers, and providing useful insights towards understanding the fundamental mechanism of human DN progression and for identifying new therapeutic targets. Electronic supplementary material The online version of this article (10.1186/s12967-019-2016-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Gang Wang
- Division of Nephrology, Jinling Hospital, Southern Medical University, Nanjing, 210016, China.,National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210016, China
| | - Jian Ouyang
- Shanghai Center for Bioinformation Technology, Shanghai Academy of Science and Technology, Shanghai, 201203, China
| | - Shen Li
- National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210016, China
| | - Hui Wang
- National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210016, China
| | - Baofeng Lian
- Shanghai Center for Bioinformation Technology, Shanghai Academy of Science and Technology, Shanghai, 201203, China
| | - Zhihong Liu
- Division of Nephrology, Jinling Hospital, Southern Medical University, Nanjing, 210016, China. .,National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210016, China.
| | - Lu Xie
- Shanghai Center for Bioinformation Technology, Shanghai Academy of Science and Technology, Shanghai, 201203, China.
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Deng Y, Gong W, Li Q, Wu X, Wu L, Zheng X, Chen W, Huang H. Resveratrol inhibits high glucose-induced activation of AP-1 and NF-κB via SphK1/S1P2 pathway to attenuate mesangial cells proliferation and inflammation. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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14
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Ji K, Wang Y, Du L, Xu C, Liu Y, He N, Wang J, Liu Q. Research Progress on the Biological Effects of Low-Dose Radiation in China. Dose Response 2019; 17:1559325819833488. [PMID: 30833876 PMCID: PMC6393828 DOI: 10.1177/1559325819833488] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 12/19/2018] [Accepted: 12/29/2018] [Indexed: 01/07/2023] Open
Abstract
Human are exposed to ionizing radiation from natural and artificial sources, which consequently poses a possible risk to human health. However, accumulating evidence indicates that the biological effects of low-dose radiation (LDR) are different from those of high-dose radiation (HDR). Low-dose radiation–induced hormesis has been extensively observed in different biological systems, including immunological and hematopoietic systems. Adaptive responses in response to LDR that can induce cellular resistance to genotoxic effects from subsequent exposure to HDR have also been described and researched. Bystander effects, another type of biological effect induced by LDR, have been shown to widely occur in many cell types. Furthermore, the influence of LDR-induced biological effects on certain diseases, such as cancer and diabetes, has also attracted the interest of researchers. Many studies have suggested that LDR has the potential antitumor and antidiabetic complications effects. In addition, the researches on whether LDR could induce stochastic effects were also debated. Studies on the biological effects of LDR in China started in 1970s and considerable progress has been made since. In the present article, we provide an overview of the research progress on the biological effects of LDR in China.
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Affiliation(s)
- Kaihua Ji
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Yan Wang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Liqing Du
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Chang Xu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Yang Liu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Ningning He
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Jinhan Wang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Qiang Liu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
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Lysophosphatidic acid increases mesangial cell proliferation in models of diabetic nephropathy via Rac1/MAPK/KLF5 signaling. Exp Mol Med 2019; 51:1-10. [PMID: 30770784 PMCID: PMC6377648 DOI: 10.1038/s12276-019-0217-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 11/20/2018] [Accepted: 11/23/2018] [Indexed: 12/11/2022] Open
Abstract
Mesangial cell proliferation has been identified as a major factor contributing to glomerulosclerosis, which is a typical symptom of diabetic nephropathy (DN). Lysophosphatidic acid (LPA) levels are increased in the glomerulus of the kidney in diabetic mice. LPA is a critical regulator that induces mesangial cell proliferation; however, its effect and molecular mechanisms remain unknown. The proportion of α-SMA+/PCNA+ cells was increased in the kidney cortex of db/db mice compared with control mice. Treatment with LPA concomitantly increased the proliferation of mouse mesangial cells (SV40 MES13) and the expression of cyclin D1 and CDK4. On the other hand, the expression of p27Kip1 was decreased. The expression of Krüppel-like factor 5 (KLF5) was upregulated in the kidney cortex of db/db mice and LPA-treated SV40 MES13 cells. RNAi-mediated silencing of KLF5 reversed these effects and inhibited the proliferation of LPA-treated cells. Mitogen-activated protein kinases (MAPKs) were activated, and the expression of early growth response 1 (Egr1) was subsequently increased in LPA-treated SV40 MES13 cells and the kidney cortex of db/db mice. Moreover, LPA significantly increased the activity of the Ras-related C3 botulinum toxin substrate (Rac1) GTPase in SV40 MES13 cells, and the dominant-negative form of Rac1 partially inhibited the phosphorylation of p38 and upregulation of Egr1 and KLF5 induced by LPA. LPA-induced hyperproliferation was attenuated by the inhibition of Rac1 activity. Based on these results, the Rac1/MAPK/KLF5 signaling pathway was one of the mechanisms by which LPA induced mesangial cell proliferation in DN models.
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16
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Sui Y, Liu W, Tian W, Li XQ, Cao W. A branched arabinoglucan from Angelica sinensis
ameliorates diabetic renal damage in rats. Phytother Res 2019; 33:818-831. [DOI: 10.1002/ptr.6275] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 10/22/2018] [Accepted: 12/07/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Yi Sui
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, School of Chemistry and Pharmacy; Northwest A&F University; Yangling 712100 China
| | - Wenjuan Liu
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, School of Chemistry and Pharmacy; Northwest A&F University; Yangling 712100 China
- Department of Natural Medicine and Institute of Materia Medica, School of Pharmacy; Fourth Military Medical University; Xi'an 710032 China
| | - Wen Tian
- Department of Pharmacology, School of Pharmacy; Fourth Military Medical University; Xi'an 710032 China
| | - Xiao-Qiang Li
- Department of Pharmacology, School of Pharmacy; Fourth Military Medical University; Xi'an 710032 China
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine; Fourth Military Medical University; Xi'an 710032 China
| | - Wei Cao
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, School of Chemistry and Pharmacy; Northwest A&F University; Yangling 712100 China
- Department of Natural Medicine and Institute of Materia Medica, School of Pharmacy; Fourth Military Medical University; Xi'an 710032 China
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine; Fourth Military Medical University; Xi'an 710032 China
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Ji T, Wang Y, Zhu Y, Gao C, Li X, Li J, Bai F, Bai S. Long noncoding RNA Gm6135 functions as a competitive endogenous RNA to regulate toll‐like receptor 4 expression by sponging miR‐203‐3p in diabetic nephropathy. J Cell Physiol 2018; 234:6633-6641. [PMID: 30295314 DOI: 10.1002/jcp.27412] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 08/20/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Ting‐Ting Ji
- Department of Nephrology Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University Shanghai China
| | - Ya‐Kun Wang
- Department of Nephrology Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University Shanghai China
| | - Ying‐Chun Zhu
- Department of Nephrology Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University Shanghai China
| | - Cong‐Pu Gao
- Department of Nephrology Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University Shanghai China
| | - Xiao‐Ying Li
- Department of Nephrology Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University Shanghai China
| | - Ji Li
- Department of Nephrology Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University Shanghai China
| | - Feng Bai
- Department of Endocrinology and Metabolism Huai’an Hospital Affiliated to Xuzhou Medical University and Huai’an Second People’s Hospital Huai’an China
| | - Shou‐Jun Bai
- Department of Nephrology Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University Shanghai China
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18
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Singh L, Arya A, Gupta S. Role of atrial natriuretic peptide in controlling diabetic nephropathy in rats. J Basic Clin Physiol Pharmacol 2018; 29:499-505. [PMID: 29672270 DOI: 10.1515/jbcpp-2017-0146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Accepted: 03/17/2018] [Indexed: 06/08/2023]
Abstract
Abstract
Background
Diabetes is a downregulator of atrial natriuretic peptide (ANP), resulting in reduced nitric oxide level and low expression of endothelial nitric oxide synthase by which nitric oxide level get reduced. In the present study, we examined the role of ANP in reduced nitric oxide level, which may be responsible in controlling diabetic nephropathy in rats.
Methods
Serum nitrite/nitrate ratio, blood urea nitrogen, protein in urine, urinary output, serum creatinine, serum cholesterol, kidney weight, kidney hypertrophy, renal cortical collagen content, thiobarbituric acid level, and antioxidant enzymatic activities were assessed.
Results
Treatment with lisinopril (1 mg/kg) significantly attenuated diabetes-induced elevated glucose level, cholesterol level, and protein in urine concentration. Whereas ANP at low dose (5 μg/kg) has no effect on elevated markers of diabetic nephropathy, treatment with intermediate (10 μg/kg) and high-dose ANP (20 μg/kg) significantly attenuated the diabetes-induced increased blood urea nitrogen, protein in urine, urinary output, creatinine, cholesterol, kidney weight, kidney hypertrophy, renal collagen content, and thiobarbituric acid level and reduced endogenous antioxidant enzymatic activities. High dose of ANP was more effective in attenuating the diabetes-induced nephropathy, renal oxidative stress, and antioxidant enzyme activity as compared with the treatment with low-dose ANP (5 μg/kg), intermediate-dose ANP (10 μg/kg), or lisinopril (1 mg/kg, employed as standard agent). Administration of erythro-9-(2-hydroxy-3-nonyl)adenine, a phosphodiesterase-2 inhibitor (3 mg/kg), in combination with high-dose ANP significantly attenuated high-dose ANP induced ameliorative effects in diabetic nephropathy.
Conclusions
Taken together, these results indicate that diabetes-induced oxidative stress and lipid alterations may be responsible for the induction of nephropathy in diabetic rats. ANP at intermediate and high doses have prevented the development of diabetes-induced nephropathy by reducing the cholesterol level, protein in urine concentration, and renal oxidative stress and by increasing the nitrite/nitrate ratio, certainly providing the direct nephroprotective action.
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Affiliation(s)
- Lakhwinder Singh
- Department of Applied Science, Chandigarh Group of Colleges, College of Engineering, Landran, Punjab, India
| | - Atul Arya
- Inder Kumar Gujral Punjab Technical University, Jalandhar, Punjab 144603, India, Phone: +919779981111
| | - Sumeet Gupta
- Department of Pharmacology, Maharishi Markandeshwar University, Mullana, Haryana, India
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19
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Song G, Han P, Sun H, Shao M, Yu X, Wang W, Wang D, Yi W, Ge N, Li S, Yi T. Astragaloside IV ameliorates early diabetic nephropathy by inhibition of MEK1/2-ERK1/2-RSK2 signaling in streptozotocin-induced diabetic mice. J Int Med Res 2018; 46:2883-2897. [PMID: 29896981 PMCID: PMC6124299 DOI: 10.1177/0300060518778711] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Objective The aim of this study was to investigate the renoprotective effects and molecular mechanisms of astragaloside IV (AS-IV) in streptozotocin (STZ)-induced diabetic mice. Methods Male C57BL/6 mice were injected intraperitoneally with STZ at 200 mg/kg body weight. AS-IV was administered for 8 consecutive weeks, beginning 1 week after STZ injection. Body weight, 24-hour urinary albumin excretion, and fasting blood glucose were measured. Kidney tissues were examined by histopathological analyses. Total levels and phosphorylation of mitogen-activated protein kinase 1/2 (MEK1/2), extracellular signal-regulated kinases 1 and 2 (ERK1/2), and ribosomal S6 kinase 2 (RSK2) were determined by Western blotting analysis. Results AS-IV treatment significantly reduced albuminuria and serum creatinine levels, ameliorated mesangial matrix expansion and greater foot process width, and decreased the levels of urinary N-acetyl-beta-D-glucosaminidase, neutrophil gelatinase-associated lipocalin, and transforming growth factor-beta 1 in STZ-induced diabetic mice. AS-IV also inhibited renal cortical phosphorylation of MEK1/2, ERK1/2 and RSK2. Conclusion Our results suggest that AS-IV attenuates renal injury in STZ-induced diabetic mice. This effect might be partially associated with inhibition of the activation of the MEK1/2-ERK1/2-RSK2 signaling pathway.
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Affiliation(s)
- Gaofeng Song
- 1 Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Pengxun Han
- 1 Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Huili Sun
- 1 Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Mumin Shao
- 2 Department of Pathology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Xuewen Yu
- 2 Department of Pathology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Wenjing Wang
- 1 Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Dongtao Wang
- 1 Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Wuyong Yi
- 1 Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Na Ge
- 1 Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Shunmin Li
- 1 Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Tiegang Yi
- 1 Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
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Figueira MF, Castiglione RC, de Lemos Barbosa CM, Ornellas FM, da Silva Feltran G, Morales MM, da Fonseca RN, de Souza-Menezes J. Diabetic rats present higher urinary loss of proteins and lower renal expression of megalin, cubilin, ClC-5, and CFTR. Physiol Rep 2018; 5:5/13/e13335. [PMID: 28676554 PMCID: PMC5506523 DOI: 10.14814/phy2.13335] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 05/25/2017] [Accepted: 05/26/2017] [Indexed: 01/27/2023] Open
Abstract
Diabetic nephropathy (DN) occurs in around 40% of those with diabetes. Proteinuria is the main characteristic of DN and develops as a result of increased permeability of the glomerulus capillary wall and/or decreased proximal tubule endocytosis. The goal of this work was to evaluate renal function and the expression of megalin, cubilin, CFTR (cystic fibrosis transmembrane conductance regulator), and ClC-5 in the proximal tubule and renal cortex of rats with type 1 diabetes. Male Wistar rats were randomly assigned to control (CTRL) and diabetic (DM) groups for 4 weeks. Renal function was assessed in 24-h urine sample by calculating clearance and fractional excretion of solutes. The RNA and protein contents of ClC-5, CFTR, megalin, and cubilin were determined in the renal proximal tubule and cortex using real-time polymerase chain reaction and western blotting techniques, respectively. The results showed higher creatinine clearance and higher urinary excretion of proteins, albumin, and transferrin in the DM group than in the CTRL group. Furthermore, the renal cortex and proximal tubule of diabetic animals showed downregulation of megalin, cubilin, ClC-5, and CFTR, critical components of the endocytic apparatus. These data suggest dysfunction in proximal tubule low-molecular-weight endocytosis and protein glomerulus filtration in the kidney of diabetic rats.
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Affiliation(s)
- Miriam F Figueira
- Laboratório Integrado de Ciências Morfofuncionais, Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, Rio de Janeiro, Brazil.,Laboratório de Fisiologia Celular e Molecular, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Raquel C Castiglione
- Laboratório de Fisiologia Celular e Molecular, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Carolina M de Lemos Barbosa
- Laboratório de Fisiologia Celular e Molecular, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Felipe M Ornellas
- Laboratório de Fisiologia Celular e Molecular, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Geórgia da Silva Feltran
- Laboratório Integrado de Ciências Morfofuncionais, Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, Rio de Janeiro, Brazil
| | - Marcelo M Morales
- Laboratório de Fisiologia Celular e Molecular, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rodrigo N da Fonseca
- Laboratório Integrado de Ciências Morfofuncionais, Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, Rio de Janeiro, Brazil
| | - Jackson de Souza-Menezes
- Laboratório Integrado de Ciências Morfofuncionais, Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, Rio de Janeiro, Brazil
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Allam G, Nasr A, Talaat IM, Abuelsaad ASA, Bakheit AM, Nemenqani D, Alsulaimani AA. Association between cytokine genes polymorphisms and type 1 diabetes: a case-control study on Saudi population. Immunol Invest 2017; 47:229-240. [DOI: 10.1080/08820139.2017.1416398] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Gamal Allam
- Department of Microbiology and Immunology, College of Medicine, Taif University , Taif, Saudi Arabia
- Immunology Section, Department of Zoology, Faculty of Science, Beni-Suef University , Beni-Suef, Egypt
| | - Amre Nasr
- Department of Basic Medical Sciences, College of Medicine, KSAU-HS , Riyadh, Saudi Arabia
- Department of Microbiology, Faculty of Science and Technology, Al-Neelain University , Khartoum, Sudan
| | - Iman M. Talaat
- Department of Pediatrics, Faculty of Medicine, Ain Shams University , Cairo, Egypt
| | - Abdelaziz S. A. Abuelsaad
- Department of Microbiology and Immunology, College of Medicine, Taif University , Taif, Saudi Arabia
- Immunology Section, Department of Zoology, Faculty of Science, Beni-Suef University , Beni-Suef, Egypt
| | - Ali M. Bakheit
- Department of Community Medicine, College of Medicine, Taif University , Taif, Saudi Arabia
| | - Dalal Nemenqani
- Department of Pathology, College of Medicine, Taif University , Taif, Saudi Arabia
| | - Adnan A. Alsulaimani
- Department of Pediatrics, College of Medicine, Taif University , Taif, Saudi Arabia
- Diabetic Center , Department of Pediatrics, Prince Mansour Military Community Hospital, Taif, Saudi Arabia
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22
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Huang J, Li J, Chen Z, Li J, Chen Q, Gong W, Liu P, Huang H. Sphingosine kinase 1 mediates diabetic renal fibrosis via NF-κB signaling pathway: involvement of CK2α. Oncotarget 2017; 8:88988-89004. [PMID: 29179493 PMCID: PMC5687663 DOI: 10.18632/oncotarget.21640] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 08/26/2017] [Indexed: 01/02/2023] Open
Abstract
Sphingosine kinase 1 (SphK1) plays a pivotal role in regulating diabetic renal fibrotic factors such as fibronectin (FN) and intercellular adhesion molecule-1 (ICAM-1). Especially, activation of SphK1 is closely linked to the body inflammatory reaction. Casein kinase 2α subunit (CK2α), a protein kinase related to inflammatory reaction, influences diabetic renal fibrosis and expressions of FN and ICAM-1 via NF-κB pathway. However, the mechanism by which SphK1 mediates diabetic renal fibrosis has not yet fully elucidated. The current study is aimed to investigate if SphK1 mediates diabetic renal fibrotic pathological process via inflammatory pathway and activation of CK2α. The following findings were observed: (1) Expressions of SphK1 were upregulated in kidneys of diabetic mice and rats; (2) Knockdown of SphK1 expression suppressed high glucose (HG)-induced NF-κB nuclear translocation and expressions of FN and ICAM-1; (3) Compared with C57 diabetic mice, SphK1-/- diabetic mice exhibited less renal fibrotic lesions, FN accumulation and NF-κB nuclear accumulation in glomeruli of kidneys; (4) SphK1 mediated phosphorylation of CK2α, while CK2α knockdown depressed SphK1-induced activation of NF-κB pathway. This study indicates the essential role of SphK1 in regulating activation of CK2α and diabetic renal fibrotic pathological process via NF-κB.
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Affiliation(s)
- Junying Huang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
- College of Life Sciences, Guangzhou University, Guangzhou 510006, China
| | - Jingyan Li
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Zhiquan Chen
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Jie Li
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Qiuhong Chen
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Wenyan Gong
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Peiqing Liu
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
- National and Local United Engineering Lab of Druggability and New Drugs Evaluation, Guangzhou 51000, China
| | - Heqing Huang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
- National and Local United Engineering Lab of Druggability and New Drugs Evaluation, Guangzhou 51000, China
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23
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Ma F, Sun T, Wu M, Wang W, Xu Z. Identification of key genes for diabetic kidney disease using biological informatics methods. Mol Med Rep 2017; 16:7931-7938. [PMID: 28990106 PMCID: PMC5779875 DOI: 10.3892/mmr.2017.7666] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Accepted: 06/11/2017] [Indexed: 01/15/2023] Open
Abstract
Diabetic kidney disease (DKD) is a common complication of diabetes, which is characterized by albuminuria, impaired glomerular filtration rate or a combination of the two. The aim of the present study was to identify the potential key genes involved in DKD progression and to subsequently investigate the underlying mechanism involved in DKD development. The array data of GSE30528 including 9 DKD and 13 control samples was downloaded from the Gene Expression Omnibus database. The differentially expressed genes (DEGs) in DKD glomerular and tubular kidney biopsy tissues were compared with normal tissues, and were analyzed using the limma package. Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were performed for DEGs using the GO Function software in Bioconductor. The protein‑protein interaction (PPI) network was then constructed using Cytoscape software. A total of 426 genes (115 up‑ and 311 downregulated) were differentially expressed between the DKD and normal tissue samples. The PPI network was constructed with 184 nodes and 335 edges. Vascular endothelial growth factor A (VEGFA), α‑actinin‑4 (ACTN4), proto‑oncogene, Src family tyrosine kinase (FYN), collagen, type 1, α2 (COL1A2) and insulin‑like growth factor 1 (IGF1) were hub proteins. Major histocompatibility complex, class II, DP α1 (HLA‑DPA1) was the common gene enriched in the rheumatoid arthritis and systemic lupus erythematosus pathways, and the immune response was a GO term enriched in module A. VEGFA, ACTN4, FYN, COL1A2, IGF1 and HLA‑DPA1 may be potential key genes associated with the progression of DKD, and immune mechanisms may serve a part in DKD development.
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Affiliation(s)
- Fuzhe Ma
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Tao Sun
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Meiyan Wu
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Wanning Wang
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Zhonggao Xu
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
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24
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Han F, Xue M, Chang Y, Li X, Yang Y, Sun B, Chen L. Triptolide Suppresses Glomerular Mesangial Cell Proliferation in Diabetic Nephropathy Is Associated with Inhibition of PDK1/Akt/mTOR Pathway. Int J Biol Sci 2017; 13:1266-1275. [PMID: 29104493 PMCID: PMC5666525 DOI: 10.7150/ijbs.20485] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Accepted: 08/28/2017] [Indexed: 02/07/2023] Open
Abstract
Mesangial cell proliferation has been identified as a mainly contributing factor to glomerulosclerosis, which is typical of diabetic nephropathy. However, the specific mechanisms and therapies remain unclear. PDK1 is a critical regulator of cell proliferation, but the specific role of PDK1 in diabetic nephropathy has not been fully illuminated. In the current study, we demonstrated that triptolide (TP) ameliorated albuminuria in the high fat diet/STZ-induced diabetic rats. TP also suppressed the increased proliferating cell markers Ki-67 and PCNA in the kidney tissues. Our results of MTT and cell cycle analysis further confirmed that TP significantly inhibited mesangial cell proliferation, and the inhibition of PDK1/Akt/mTOR pathway might be the underlying mechanisms. In addition, we also found that the PDK1 activator (PS48) could reverse the cell proliferation inhibition role of TP. These data suggest that TP may be useful in prevention of diabetic glomerulosclerosis and that PDK1/Akt/mTOR pathway might be the underlying mechanism.
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Affiliation(s)
| | | | | | | | | | - Bei Sun
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University
| | - Liming Chen
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University
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25
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Bowyer JF, Tranter KM, Sarkar S, George NI, Hanig JP, Kelly KA, Michalovicz LT, Miller DB, O'Callaghan JP. Corticosterone and exogenous glucose alter blood glucose levels, neurotoxicity, and vascular toxicity produced by methamphetamine. J Neurochem 2017; 143:198-213. [PMID: 28792619 DOI: 10.1111/jnc.14143] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 08/01/2017] [Accepted: 08/04/2017] [Indexed: 12/29/2022]
Abstract
Our previous studies have raised the possibility that altered blood glucose levels may influence and/or be predictive of methamphetamine (METH) neurotoxicity. This study evaluated the effects of exogenous glucose and corticosterone (CORT) pretreatment alone or in combination with METH on blood glucose levels and the neural and vascular toxicity produced. METH exposure consisted of four sequential injections of 5, 7.5, 10, and 10 mg/kg (2 h between injections) D-METH. The three groups given METH in combination with saline, glucose (METH+Glucose), or CORT (METH+CORT) had significantly higher glucose levels compared to the corresponding treatment groups without METH except at 3 h after the last injection. At this last time point, the METH and METH+Glucose groups had lower levels than the non-METH groups, while the METH+CORT group did not. CORT alone or glucose alone did not significantly increase blood glucose. Mortality rates for the METH+CORT (40%) and METH+Glucose (44%) groups were substantially higher than the METH (< 10%) group. Additionally, METH+CORT significantly increased neurodegeneration above the other three METH treatment groups (≈ 2.5-fold in the parietal cortex). Thus, maintaining elevated levels of glucose during METH exposure increases lethality and may exacerbate neurodegeneration. Neuroinflammation, specifically microglial activation, was associated with degenerating neurons in the parietal cortex and thalamus after METH exposure. The activated microglia in the parietal cortex were surrounding vasculature in most cases and the extent of microglial activation was exacerbated by CORT pretreatment. Our findings show that acute CORT exposure and elevated blood glucose levels can exacerbate METH-induced vascular damage, neuroinflammation, neurodegeneration and lethality. Cover Image for this issue: doi. 10.1111/jnc.13819.
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Affiliation(s)
- John F Bowyer
- Division of Neurotoxicology, National Center for Toxicology/FDA, Jefferson, Arkansas, USA
| | - Karen M Tranter
- Division of Neurotoxicology, National Center for Toxicology/FDA, Jefferson, Arkansas, USA
| | - Sumit Sarkar
- Division of Neurotoxicology, National Center for Toxicology/FDA, Jefferson, Arkansas, USA
| | - Nysia I George
- Division of Bioinformatics and Biostatistics, National Center for Toxicological Research/FDA, Jefferson, Arkansas, USA
| | - Joseph P Hanig
- Center for Drug Evaluation and Research/FDA Silver Spring, Silver Spring, Maryland, USA
| | - Kimberly A Kelly
- Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health Morgantown, Morgantown, West Virginia, USA
| | - Lindsay T Michalovicz
- Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health Morgantown, Morgantown, West Virginia, USA
| | - Diane B Miller
- Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health Morgantown, Morgantown, West Virginia, USA
| | - James P O'Callaghan
- Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health Morgantown, Morgantown, West Virginia, USA
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Sphingosine kinase 1 mediates AGEs-induced fibronectin upregulation in diabetic nephropathy. Oncotarget 2017; 8:78660-78676. [PMID: 29108256 PMCID: PMC5667989 DOI: 10.18632/oncotarget.20205] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Accepted: 07/12/2017] [Indexed: 12/17/2022] Open
Abstract
Activation of sphingosine kinase 1 (SphK1) signaling pathway mediates fibronectin (FN) upregulation in glomerular mesangial cells (GMCs) under high glucose (HG) condition. However, the roles of SphK1 in advanced glycation end products (AGEs)-induced DN have not been elucidated. Here we show that AGEs upregulated FN and SphK1 and SphK1 activity. Inhibition of SphK1 signaling attenuated AGEs-induced FN synthesis in GMCs. Inhibition of AGE receptor (RAGE) signaling reduced the upregulation of FN and SphK1 and SphK1 activity in GMCs induced by AGEs. Treatment of aminoguanidine ameliorates the renal injury and fibrosis in STZ-induced diabetic mice and attenuated SphK1 expression and activity in diabetic mouse kidneys. The renal injury and fibrosis in diabetic SphK1-/- mice was significantly attenuated than WT mice. Furthermore, AGEs upregulated SphK1 by reducing its degradation and prolonging its half-life. Conclusion: SphK1 mediates AGEs-induced FN synthesis in GMCs and diabetic mice under hyperglycemic condition.
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27
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Protein kinase CK2α catalytic subunit ameliorates diabetic renal inflammatory fibrosis via NF-κB signaling pathway. Biochem Pharmacol 2017; 132:102-117. [DOI: 10.1016/j.bcp.2017.02.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 02/21/2017] [Indexed: 12/18/2022]
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28
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Wang S, Yang Z, Xiong F, Chen C, Chao X, Huang J, Huang H. Betulinic acid ameliorates experimental diabetic-induced renal inflammation and fibrosis via inhibiting the activation of NF-κB signaling pathway. Mol Cell Endocrinol 2016; 434:135-43. [PMID: 27364889 DOI: 10.1016/j.mce.2016.06.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 06/15/2016] [Accepted: 06/16/2016] [Indexed: 12/31/2022]
Abstract
Diabetic nephropathy (DN) is the leading cause of end-stage renal failure and is characterized by excessive deposition of extracellular matrix (ECM) proteins such as fibronectin (FN), in the glomerular mesangium and tubulointerstitium. Betulinic acid (BA), a pentacyclic triterpene derived from the bark of the white birch tree, has been demonstrated to have many pharmacological activities. However, the effect of BA on DN has not been fully elucidated. To explore the possible anti-inflammatory effects of BA and their underlying mechanisms, we used streptozotocin-induced diabetic rat kidneys and high glucose-treated glomerular mesangial cells. Our study showed BA could inhibit the degradation of IκBα and the activity of NF-κB in diabetic rat kidneys and high glucose-induced mesangial cells, resulting in reduction of FN expression. In addition, BA suppressed the DNA binding activity and transcriptional activity of NF-κB in high glucose-induced glomerular mesangial cells (GMCs). Furthermore, BA enhanced the interaction between IκBα and β-arrestin2 in mesangial cells. Taken together, our data suggest BA inhibits NF-κB activation through stabilizing NF-κB inhibitory protein IκBα, thereby preventing diabetic renal fibrosis.
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Affiliation(s)
- Shaogui Wang
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Zhiying Yang
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Fengxiao Xiong
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Cheng Chen
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Xiaojuan Chao
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Junying Huang
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Heqing Huang
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
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29
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Yang Z, Li J, Xiong F, Huang J, Chen C, Liu P, Huang H. Berberine attenuates high glucose-induced fibrosis by activating the G protein-coupled bile acid receptor TGR5 and repressing the S1P2/MAPK signaling pathway in glomerular mesangial cells. Exp Cell Res 2016; 346:241-7. [DOI: 10.1016/j.yexcr.2016.06.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 06/02/2016] [Accepted: 06/08/2016] [Indexed: 12/15/2022]
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30
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Yang Z, Xiong F, Wang Y, Gong W, Huang J, Chen C, Liu P, Huang H. TGR5 activation suppressed S1P/S1P2 signaling and resisted high glucose-induced fibrosis in glomerular mesangial cells. Pharmacol Res 2016; 111:226-236. [PMID: 27317945 DOI: 10.1016/j.phrs.2016.05.035] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 05/17/2016] [Accepted: 05/23/2016] [Indexed: 12/31/2022]
Abstract
Glucose and lipid metabolism disorders and chronic inflammation in the kidney tissues are largely responsible for causative pathological mechanism of renal fibrosis in diabetic nephropathy (DN). As our previous findings confirmed that, sphingosine 1-phosphate (S1P)/sphingosine 1-phosphate receptor 2 (S1P2) signaling activation promoted renal fibrosis in diabetes. Numerous studies have demonstrated that the G protein-coupled bile acid receptor TGR5 exhibits effective regulation of glucose and lipid metabolism and anti-inflammatory effects. TGR5 is highly expressed in kidney tissues, whether it attenuates the inflammation and renal fibrosis by inhibiting the S1P/S1P2 signaling pathway would be a new insight into the molecular mechanism of DN. Here we investigated the effects of TGR5 on diabetic renal fibrosis, and the underlying mechanism would be also discussed. We found that TGR5 activation significantly decreased the expression of intercellular adhesion molecule-1 (ICAM-1) and transforming growth factor-beta 1 (TGF-β1), as well as fibronectin (FN) induced by high glucose in glomerular mesangial cells (GMCs), which were pathological features of DN. S1P2 overexpression induced by high glucose was diminished after activation of TGR5, and AP-1 activity, including the phosphorylation of c-Jun/c-Fos and AP-1 transcription activity, was attenuated. As a G protein-coupled receptor, S1P2 interacted with TGR5 in GMCs. Furthermore, INT-777 lowered S1P2 expression and promoted S1P2 internalization. Taken together, TGR5 activation reduced ICAM-1, TGF-β1 and FN expressions induced by high glucose in GMCs, the mechanism might be through suppressing S1P/S1P2 signaling, thus ameliorating diabetic nephropathy.
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Affiliation(s)
- Zhiying Yang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China; National and Local United Engineering Lab of Druggability and New Drugs Evaluation, Guangzhou 510006, China; Guangdong Provincial Engineering Laboratory of Druggability and New Drugs Evaluation, Guangzhou 510006, China
| | - Fengxiao Xiong
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yu Wang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Wenyan Gong
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Junying Huang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Cheng Chen
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Peiqing Liu
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China; National and Local United Engineering Lab of Druggability and New Drugs Evaluation, Guangzhou 510006, China; Guangdong Provincial Engineering Laboratory of Druggability and New Drugs Evaluation, Guangzhou 510006, China
| | - Heqing Huang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China; National and Local United Engineering Lab of Druggability and New Drugs Evaluation, Guangzhou 510006, China; Guangdong Provincial Engineering Laboratory of Druggability and New Drugs Evaluation, Guangzhou 510006, China.
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31
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Corosolic acid inhibits the proliferation of glomerular mesangial cells and protects against diabetic renal damage. Sci Rep 2016; 6:26854. [PMID: 27229751 PMCID: PMC4882506 DOI: 10.1038/srep26854] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 05/10/2016] [Indexed: 12/21/2022] Open
Abstract
Diabetic nephropathy (DN) is one of the major complications of diabetes mellitus (DM). This study aimed to explore the effects of corosolic acid (CA) on the renal damage of DM and the mechanisms behind these effects. The renoprotective effect of CA was investigated in type 1 diabetic rats and db/db mice. The kidneys and glomerular mesangial cells (GMCs) were used to study the proliferation of GMCs by immunostaining and MTT assay. Further immunoblotting, siRNA, qPCR analysis, and detecting of NADPH oxidase activity and reactive oxygen species (ROS) generation were performed to explore relevant molecular mechanisms. In CA-treated diabetic animals, diabetes-induced albuminuria, increased serum creatinine and blood urea nitrogen were significantly attenuated, and glomerular hypertrophy, mesangial expansion and fibrosis were ameliorated. Furthermore, CA significantly inhibited proliferation of GMCs and phosphorylation of ERK1/2 and p38 MAPK in both diabetic animals and high glucose (HG)-induced GMCs. CA also normalized Δψm and inhibited HG-induced NADPH oxidase activity, ROS generation and NOX4, NOX2, p22(phox) and p47(phox) expression. More importantly, CA inhibited GMC proliferation mediated by NADPH/ERK1/2 and p38 MAPK signaling pathways. These findings suggest that CA exert the protective effect on DN by anti-proliferation resulted from inhibition of p38 MAPK- and NADPH-mediated inactivation of ERK1/2.
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Chen C, Huang K, Hao J, Huang J, Yang Z, Xiong F, Liu P, Huang H. Polydatin attenuates AGEs-induced upregulation of fibronectin and ICAM-1 in rat glomerular mesangial cells and db/db diabetic mice kidneys by inhibiting the activation of the SphK1-S1P signaling pathway. Mol Cell Endocrinol 2016; 427:45-56. [PMID: 26948947 DOI: 10.1016/j.mce.2016.03.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 02/28/2016] [Accepted: 03/03/2016] [Indexed: 01/23/2023]
Abstract
We previously demonstrated that activation of sphingosine kinase 1 (SphK1)- sphingosine 1- phosphate (S1P) signaling pathway by high glucose (HG) plays a pivotal role in increasing the expression of fibronectin (FN), an important fibrotic component, by promoting the DNA-binding activity of transcription factor activator protein 1 (AP-1) in glomerular mesangial cells (GMCs) under diabetic conditions. As a multi-target anti-oxidative drug, polydatin (PD) has been shown to have renoprotective effects on experimental diabetes. However, whether PD could resist diabetic nephropathy (DN) by regulating SphK1-S1P signaling pathway needs further investigation. Here, we found that PD significantly reversed the upregulated FN and ICAM-1 expression in GMCs exposed to AGEs. Simultaneously, PD dose-dependently inhibited SphK1 levels at the protein expression and kinase activity and attenuated S1P production under AGEs treatment conditions. In addition, PD reduced SphK activity in GMCs transfected with wild-type SphK(WT) plasmid and significantly suppressed SphK1-mediated increase of FN and ICAM-1 levels under normal conditions. Furthermore, we found that the AGEs-induced upregulation of phosphorylation of c-Jun at Ser63 and Ser73 and c-Fos at Ser32, DNA-binding activity and transcriptional activity of AP-1 were blocked by PD. In comparison with db/db model group, PD treatment suppressed SphK1 levels (mRNA, protein expression, and activity) and S1P production, reversed the upregulation of FN, ICAM-1, c-Jun, and c-Fos in the kidney tissues of diabetic mice, and finally ameliorated renal injury in db/db mice. These findings suggested that the downregulation of SphK1-S1P signaling pathway is probably a novel mechanism by which PD suppressed AGEs-induced FN and ICAM-1 expression and improved renal dysfunction of diabetic models.
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Affiliation(s)
- Cheng Chen
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Kaipeng Huang
- Department of Pharmacy, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Jie Hao
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Junying Huang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Zhiying Yang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Fengxiao Xiong
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Peiqing Liu
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Heqing Huang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
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Role of atrial natriuretic peptide in ischemic preconditioning-induced cardioprotection in the diabetic rat heart. J Surg Res 2015; 201:272-8. [PMID: 27020807 DOI: 10.1016/j.jss.2015.10.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 10/13/2015] [Accepted: 10/30/2015] [Indexed: 01/16/2023]
Abstract
BACKGROUND It has been noted that nitric oxide (NO) is involved in the ischemic preconditioning (IPC)-mediated cardioprotection. Diabetes is a downregulator of atrial natriuretic peptide (ANP), resulting in low expression of endothelial nitric oxide synthase (eNOS) by which NO level get reduced. The purpose of the present study was to investigate the role of ANP in attenuated cardioprotective effect of IPC in the diabetic rat heart. METHODS The heart was isolated from the diabetic rat and mounted on Langendorff's apparatus, subjected to 30-min ischemia and 120-min reperfusion. IPC was mediated by four cycles of 5-min ischemia and 5-min reperfusion. The infarct size was estimated using triphenyltetrazolium chloride stain, and coronary effluent was analyzed for lactate dehydrogenase and creatinine kinase-MB release to assess the degree of myocardial injury. The cardiac release of NO was estimated indirectly by measuring the release of nitrite in coronary effluent. RESULTS IPC-mediated cardioprotection was significantly attenuated in the diabetic rat as compared with the normal rat. Perfusion of ANP (0.1 μM/L) in the diabetic rat heart significantly restored the attenuated cardioprotective effect of IPC and also increased the release of NO. However, this observed cardioprotection was significantly attenuated by perfusion of N-nitro L-arginine methyl ester, an eNOS inhibitor (100 μM/L) noted in terms of increase in myocardial infarct size, release of lactate dehydrogenase and creatinine kinase-MB, and also decreases in release of NO. CONCLUSIONS Thus, it is suggested that ANP restores the attenuated cardioprotective effect in the diabetic heart which may be due to increase in the expression of eNOS and subsequent increase in the activity of NO.
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Tunkamnerdthai O, Auvichayapat P, Donsom M, Leelayuwat N. Improvement of pulmonary function with arm swing exercise in patients with type 2 diabetes. J Phys Ther Sci 2015; 27:649-54. [PMID: 25931700 PMCID: PMC4395684 DOI: 10.1589/jpts.27.649] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 10/10/2014] [Indexed: 11/24/2022] Open
Abstract
[Purpose] Obesity and hyperglycemia play roles in the impairment of pulmonary function in
type 2 diabetes mellitus (T2DM) patients. Low-intensity exercise is known to reduce body
fat and improve hyperglycemia. The arm swing exercise (ASE), a low-intensity exercise, is
easy and convenient to perform without any equipment and is suitable for daily practice.
Therefore, we aimed to investigate the effects of ASE on lung function and obesity in
overweight T2DM patients. [Subjects and Methods] Twenty-four subjects continued their
daily life routines for 8 weeks (control period), and then performed ASE for 8 weeks (30
minutes per day, 3 days per week) (ASE period). Pulmonary function tests were performed,
and fasting blood glucose, haemoglobin A1c (HbA1c), lipid profiles, high-sensitive
C-reactive protein (HSCRP), insulin concentration, and anthropometric parameters were
measured before and after each period. [Results] After the ASE period, the forced vital
capacity, forced expiratory volume in the first second of expiration, and maximal
voluntary ventilation were increased when compared with after the control period. HbA1c, a
low-density lipoprotein, malondialdehyde, oxidized glutathione, and the percent body fat
were significantly decreased when compared with after the control period. However, other
parameters, such as lung volume, anthropometric parameters, and fasting blood glucose,
insulin, high-density lipoprotein, triglycerides, total cholesterol and glutathione
concentrations, showed no differences between the two periods. [Conclusion] These data
suggest that there is improvement of pulmonary functions in T2DM patients after ASE
training.
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Affiliation(s)
- Orathai Tunkamnerdthai
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Thailand ; Exercise and Sport Sciences Research and Development Group, Faculty of Medicine, Khon Kaen University, Thailand
| | | | - Montana Donsom
- Queen Sirikit Heart Center of the Northeast, Faculty of Medicine, Khon Kaen University, Thailand
| | - Naruemon Leelayuwat
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Thailand ; Exercise and Sport Sciences Research and Development Group, Faculty of Medicine, Khon Kaen University, Thailand
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Erbas O, Yapislar H, Oltulu F, Yavasoğlu A, Aktug H, Taskiran D. Nephro-protective effect of granulocyte colony-stimulating factor in streptozotocin induced diabetic rats. Biotech Histochem 2014; 89:488-96. [DOI: 10.3109/10520295.2014.899625] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kuehn C, Vermette P, Fülöp T. Cross talk between the extracellular matrix and the immune system in the context of endocrine pancreatic islet transplantation. A review article. ACTA ACUST UNITED AC 2014; 62:67-78. [DOI: 10.1016/j.patbio.2014.01.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 01/31/2014] [Indexed: 12/14/2022]
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Tong Z, Liu W. IgG-positive cells surround pancreatic ducts and form multiple layers after streptozotocin treatment. Autoimmunity 2014; 46:369-74. [PMID: 24001204 DOI: 10.3109/08916934.2013.773977] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Although numerous studies of diabetes have focused on cell-mediated immunity to pancreatic islet cells, little is known about immune cells in the pancreatic duct region. In this study, we found that membrane immunoglobulin G (IgG)-positive cells comprised about 1.4% of the total pancreatic cells in mice, forming a thin septum that surrounds large and medium pancreatic ducts. The IgG-positive cells showed low expression of beta-catenin and were amylase-, cytokeratin-, insulin-, and glucagon-negative. Flow cytometric analysis showed that the IgG-positive cells were also positive for CD45, Sca-1, c-Kit, CD49f, and CD133, and negative for Flk-1, suggesting that they were undifferentiated hematopoietic cells. On day 5 after streptozotocin treatment, the percentage of periductal IgG-positive cells increased to 3.37% of total pancreatic cells, and the periductal IgG-positive cells formed multiple layers (beta-catenin-low, and amylase-, cytokeratin-, insulin-, glucagon-negative). These cells were Ki67-negative, suggesting they were recruited from hematopoietic cells. We further found that IgG-positive cells formed multiple layers around large ducts of pancreas from NOD mice. Our findings reveal the existence of periductal IgG-positive cells in the adult mouse pancreas, which were activated during streptozotocin-induced diabetes, adding a new dimension to our understanding of immunity in diabetes.
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Affiliation(s)
- Zan Tong
- School of Basic Medical Science, Wuhan University, Wuhan, China.
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Huang K, Huang J, Chen C, Hao J, Wang S, Huang J, Liu P, Huang H. AP-1 regulates sphingosine kinase 1 expression in a positive feedback manner in glomerular mesangial cells exposed to high glucose. Cell Signal 2014; 26:629-38. [DOI: 10.1016/j.cellsig.2013.12.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 12/06/2013] [Accepted: 12/09/2013] [Indexed: 01/23/2023]
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Attenuation of hyperlipidemia- and diabetes-induced early-stage apoptosis and late-stage renal dysfunction via administration of fibroblast growth factor-21 is associated with suppression of renal inflammation. PLoS One 2013; 8:e82275. [PMID: 24349242 PMCID: PMC3857822 DOI: 10.1371/journal.pone.0082275] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 11/01/2013] [Indexed: 12/21/2022] Open
Abstract
Background Lipotoxicity is a key feature of the pathogenesis of diabetic kidney disease, and is attributed to excessive lipid accumulation (hyperlipidemia). Increasing evidence suggests that fibroblast growth factor (FGF)21 has a crucial role in lipid metabolism under diabetic conditions. Objective The present study investigated whether FGF21 can prevent hyperlipidemia- or diabetes-induced renal damage, and if so, the possible mechanism. Methods Mice were injected with free fatty acids (FFAs, 10 mg/10 g body weight) or streptozotocin (150 mg/kg) to establish a lipotoxic model or type 1 diabetic model, respectively. Simultaneously the mice were treated with FGF21 (100 µg/kg) for 10 or 80 days. The kidney weight-to-tibia length ratio and renal function were assessed. Systematic and renal lipid levels were detected by ELISA and Oil Red O staining. Renal apoptosis was examined by TUNEL assay. Inflammation, oxidative stress, and fibrosis were assessed by Western blot. Results Acute FFA administration and chronic diabetes were associated with lower kidney-to-tibia length ratio, higher lipid levels, severe renal apoptosis and renal dysfunction. Obvious inflammation, oxidative stress and fibrosis also observed in the kidney of both mice models. Deletion of the fgf21 gene further enhanced the above pathological changes, which were significantly prevented by administration of exogenous FGF21. Conclusion These results suggest that FFA administration and diabetes induced renal damage, which was further enhanced in FGF21 knock-out mice. Administration of FGF21 significantly prevented both FFA- and diabetes-induced renal damage partially by decreasing renal lipid accumulation and suppressing inflammation, oxidative stress, and fibrosis.
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Emodin attenuates high glucose-induced TGF-β1 and fibronectin expression in mesangial cells through inhibition of NF-κB pathway. Exp Cell Res 2013; 319:3182-9. [PMID: 24140264 DOI: 10.1016/j.yexcr.2013.10.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 10/03/2013] [Accepted: 10/05/2013] [Indexed: 12/23/2022]
Abstract
The activation of nuclear factor-κB (NF-κB) and the subsequent overexpression of its downstream targets transforming growth factor-β1 (TGF-β1) and fibronectin (FN) are among the hallmarks for the progressive diabetic nephropathy. Our previous studies demonstrated that emodin ameliorated renal injury and inhibited extracellular matrix accumulation in kidney and mesangial cells under diabetic condition. However, the molecular mechanism has not been fully elucidated. Here, we showed that emodin significantly attenuated high glucose-induced NF-κB nuclear translocation in mesangial cells. Interestingly, emodin also inhibited the DNA-binding activity and transcriptional activity of NF-κB. Furthermore, NF-κB-mediated TGF-β1 and FN expression was significantly decreased by emodin. These results demonstrated that emodin suppressed TGF-β1 and FN overexpression through inhibition of NF-κB activation, suggesting that emodin-mediated inhibition of the NF-κB pathway could protect against diabetic nephropathy.
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Lack of association of IL-6 polymorphism with rheumatoid arthritis/type 1 diabetes: A meta-analysis. Joint Bone Spine 2013; 80:477-81. [DOI: 10.1016/j.jbspin.2012.11.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2012] [Accepted: 11/21/2012] [Indexed: 12/27/2022]
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Lan T, Wu T, Gou H, Zhang Q, Li J, Qi C, He X, Wu P, Wang L. Andrographolide suppresses high glucose-induced fibronectin expression in mesangial cells via inhibiting the AP-1 pathway. J Cell Biochem 2013; 114:2562-8. [DOI: 10.1002/jcb.24601] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 05/21/2013] [Indexed: 12/20/2022]
Affiliation(s)
- Tian Lan
- Vascular Biology Research Institute; Guangdong Pharmaceutical University; Guangzhou; 510006; China
| | - Teng Wu
- Vascular Biology Research Institute; Guangdong Pharmaceutical University; Guangzhou; 510006; China
| | - Hongju Gou
- Department of Pathology, School of Basic Medical Sciences; Southern Medical University; Guangzhou; 510515; China
| | - Qianqian Zhang
- Vascular Biology Research Institute; Guangdong Pharmaceutical University; Guangzhou; 510006; China
| | - Jiangchao Li
- Vascular Biology Research Institute; Guangdong Pharmaceutical University; Guangzhou; 510006; China
| | - Cuiling Qi
- Vascular Biology Research Institute; Guangdong Pharmaceutical University; Guangzhou; 510006; China
| | - Xiaodong He
- Vascular Biology Research Institute; Guangdong Pharmaceutical University; Guangzhou; 510006; China
| | - Pingxiang Wu
- Department of Pathology, School of Basic Medical Sciences; Southern Medical University; Guangzhou; 510515; China
| | - Lijing Wang
- Vascular Biology Research Institute; Guangdong Pharmaceutical University; Guangzhou; 510006; China
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Martini S, Nair V, Patel SR, Eichinger F, Nelson RG, Weil EJ, Pezzolesi MG, Krolewski AS, Randolph A, Keller BJ, Werner T, Kretzler M. From single nucleotide polymorphism to transcriptional mechanism: a model for FRMD3 in diabetic nephropathy. Diabetes 2013; 62:2605-12. [PMID: 23434934 PMCID: PMC3712052 DOI: 10.2337/db12-1416] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Genome-wide association studies have proven to be highly effective at defining relationships between single nucleotide polymorphisms (SNPs) and clinical phenotypes in complex diseases. Establishing a mechanistic link between a noncoding SNP and the clinical outcome is a significant hurdle in translating associations into biological insight. We demonstrate an approach to assess the functional context of a diabetic nephropathy (DN)-associated SNP located in the promoter region of the gene FRMD3. The approach integrates pathway analyses with transcriptional regulatory pattern-based promoter modeling and allows the identification of a transcriptional framework affected by the DN-associated SNP in the FRMD3 promoter. This framework provides a testable hypothesis for mechanisms of genomic variation and transcriptional regulation in the context of DN. Our model proposes a possible transcriptional link through which the polymorphism in the FRMD3 promoter could influence transcriptional regulation within the bone morphogenetic protein (BMP)-signaling pathway. These findings provide the rationale to interrogate the biological link between FRMD3 and the BMP pathway and serve as an example of functional genomics-based hypothesis generation.
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Affiliation(s)
- Sebastian Martini
- Departments of Internal Medicine and Nephrology, University of Michigan, Ann Arbor, Michigan
| | - Viji Nair
- Departments of Internal Medicine and Nephrology, University of Michigan, Ann Arbor, Michigan
| | - Sanjeevkumar R. Patel
- Departments of Internal Medicine and Nephrology, University of Michigan, Ann Arbor, Michigan
| | - Felix Eichinger
- Departments of Internal Medicine and Nephrology, University of Michigan, Ann Arbor, Michigan
| | - Robert G. Nelson
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, Arizona
| | - E. Jennifer Weil
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, Arizona
| | - Marcus G. Pezzolesi
- Research and Clinic Divisions, Joslin Diabetes Center, Boston, Massachusetts
| | | | - Ann Randolph
- Departments of Internal Medicine and Nephrology, University of Michigan, Ann Arbor, Michigan
| | - Benjamin J. Keller
- Department of Computer Science, Eastern Michigan University, Ypsilanti, Michigan
| | - Thomas Werner
- Departments of Internal Medicine and Nephrology, University of Michigan, Ann Arbor, Michigan
- Genomatix Software GmbH, Munich, Germany
| | - Matthias Kretzler
- Departments of Internal Medicine and Nephrology, University of Michigan, Ann Arbor, Michigan
- Corresponding author: Matthias Kretzler,
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Quan HY, Kim DY, Chung SH. Korean red ginseng extract alleviates advanced glycation end product-mediated renal injury. J Ginseng Res 2013; 37:187-93. [PMID: 23717171 PMCID: PMC3659634 DOI: 10.5142/jgr.2013.37.187] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 10/31/2012] [Accepted: 11/07/2012] [Indexed: 11/24/2022] Open
Abstract
The effect of Korean red ginseng (KRG) on diabetic renal damage was investigated using streptozotocin (STZ)-induced diabetic rats. The diabetic rats showed loss of body weight gain, and increases in kidney weight and urine volume, whereas the oral administration of KRG at a dose of 100 or 250 mg/kg of body weight per day for 28 d prevented these diabetes-induced physiological abnormalities. Among the kidney function parameters, elevated plasma levels of urea nitrogen and creatinine in diabetic control rats tended to be lowered in KRG-treated rats. In addition, administration of KRG at a dose of 100 mg/kg body weight in the diabetic rats showed significant decreases in serum glucose and tumor necrosis factor-α (TNF-α), implying that KRG might prevent the pathogenesis of diabetic complications caused by impaired glucose metabolism and oxidative stress. KRG also significantly reduced advanced glycation end product (AGE) formation and secretion from kidney of diabetic rats. Furthermore, KRG decreased the levels of N-(carboxymethyl) lysine and expression of AGE receptor. KRG also reduced the overexpression of cyclooxygenase-2 and inducible nitric oxide synthase in the kidney via deactivation of nuclear factor-kappa B. We also found that KRG prevented STZ-induced destruction of glomerular structure and significantly suppressed high glucose-induced fibronectin production. Taken together, KRG ameliorates abnormalities associated with diabetic nephropathy through suppression of inflammatory pathways activated by TNF-α and AGEs. These findings indicate that KRG has a beneficial effect on pathological conditions associated with diabetic nephropathy.
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Affiliation(s)
- Hai Yan Quan
- Department of Pharmacology and Clinical Pharmacy, College of Pharmacy, Kyung Hee University, Seoul 130-701, Korea
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Tang LQ, Wang FL, Zhu LN, Lv F, Liu S, Zhang ST. Berberine ameliorates renal injury by regulating G proteins-AC- cAMP signaling in diabetic rats with nephropathy. Mol Biol Rep 2012; 40:3913-23. [PMID: 23266672 DOI: 10.1007/s11033-012-2468-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Accepted: 12/18/2012] [Indexed: 11/25/2022]
Abstract
Diabetic nephropathy (DN) is a progressive kidney disease that is caused by injury to glomerulus and glomerular mesangial cells (MCs) proliferation play a critical role in the pathogenesis of DN. The current studies were undertaken to investigate the protective effects and the possible molecular mechanism of berberine on streptozotocin (STZ)-induced DN rats. Male Wistar rats were randomly assigned to normal control and DN groups of comparable age. Three DN groups received 50, 100 and 200 mg/kg of berberine for 8 weeks via daily intragastrically, respectively. The G proteins-adenylyl cyclase (AC)-cAMP signaling pathway and glomerular MCs proliferation were examined in STZ-induced diabetic rat kidney. Enhanced MCs proliferation and remarkable renal injury were concomitant with activation of Gαi and inhibition of Gαs and cAMP in DN model group. Berberine treatment for 8 weeks abolished the above changes by upregulating the expression of Gαs protein and downregulating the expression of Gαi protein, increasing cAMP level, and inhibiting MCs proliferation compared with model group. Taken together, for the first time, these results demonstrated that berberine can relieve renal injury in DN rats through mediating G proteins-AC-cAMP signaling pathway and inhibiting the abnormal proliferation of MCs by increasing cAMP level, suggesting that berberine could be a potential therapeutic agent for the treatment of DN.
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Affiliation(s)
- Li Qin Tang
- Department of Pharmacy, Affiliated Anhui Provincial Hospital, Anhui Medical University, Hefei, 230001, Anhui, People's Republic of China.
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Xie X, Peng J, Huang K, Huang J, Shen X, Liu P, Huang H. Polydatin ameliorates experimental diabetes-induced fibronectin through inhibiting the activation of NF-κB signaling pathway in rat glomerular mesangial cells. Mol Cell Endocrinol 2012; 362:183-93. [PMID: 22732364 DOI: 10.1016/j.mce.2012.06.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Revised: 05/17/2012] [Accepted: 06/15/2012] [Indexed: 11/18/2022]
Abstract
A number of studies have recently demonstrated the involvement of nuclear factor-kappa B (NF-κB) activation and the subsequent coordinated inflammatory responses in the pathogenesis of diabetic nephropathy (DN). Polydatin has been shown to have the ability of anti-adhesive inflammation. However, the possible protective and beneficial effects of polydatin on DN via suppressing inflammatory damage and extracellular matrix (ECM) accumulation are not fully elucidated. We found that the polydatin could inhibit the induction and activity of NF-κB, and meanwhile ameliorating ECM accumulation in streptozotocin-diabetic rats. We aimed to investigate the effect of polydatin on fibronectin (FN) protein expression, and to elucidate its potential mechanism involving the NF-κB inflammatory signaling pathway in rat glomerular mesangial cells (GMCs) cultured under high glucose. The results revealed that polydatin significantly suppressed high glucose-induced FN production, inhibited NF-κB nuclear translocation, reduced the DNA-binding activity of NF-κB, as well as decreased the protein expression of ICAM-1 and TGF-β in GMCs. These findings suggested that polydatin significantly represses high glucose-induced FN expression in rat GMCs, which may be closely related to its inhibition of the NF-κB signaling pathway. Hence, we elucidated the potential mechanisms of the anti-inflammatory effects and ECM accumulation alleviation of polydatin in GMCs of DN in vitro.
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Affiliation(s)
- Xi Xie
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
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Pinent M, Cedó L, Montagut G, Blay M, Ardévol A. Procyanidins improve some disrupted glucose homoeostatic situations: an analysis of doses and treatments according to different animal models. Crit Rev Food Sci Nutr 2012; 52:569-84. [PMID: 22530710 DOI: 10.1080/10408398.2010.501533] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review analyses the potential beneficial effects of procyanidins, the main class of flavonoids, in situations in which glucose homeostasis is disrupted. Because the disruption of glucose homeostasis can occur as a result of various causes, we critically review the effects of procyanidins based on the specific origin of each type of disruption. Where little or no insulin is present (Type I diabetic animals), summarized studies of procyanidin treatment suggest that procyanidins have a short-lived insulin-mimetic effect on the internal targets of the organism, an effect not reproduced in normoglycemic, normoinsulinemic healthy animals. Insulin resistance (usually linked to hyperinsulinemia) poses a very different situation. Preventive studies using fructose-fed models indicate that procyanidins may be useful in preventing the induction of damage and thus in limiting hyperglycemia. But the results of other studies using models such as high-fat diet treated rats or genetically obese animals are controversial. Although the effects on glucose parameters are hazy, it is known that procyanidins target key tissues involved in its homeostasis. Interestingly, all available data suggest that procyanidins are more effective when administered in one acute load than when mixed with food.
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Affiliation(s)
- Montserrat Pinent
- Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili (URV), Tarragona, Spain
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Lan T, Liu W, Xie X, Xu S, Huang K, Peng J, Shen X, Liu P, Wang L, Xia P, Huang H. Sphingosine kinase-1 pathway mediates high glucose-induced fibronectin expression in glomerular mesangial cells. Mol Endocrinol 2011; 25:2094-105. [PMID: 21998146 DOI: 10.1210/me.2011-0095] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Diabetic nephropathy is characterized by accumulation of glomerular extracellular matrix proteins, such as fibronectin (FN). Here, we investigated whether sphingosine kinase (SphK)1 pathway is responsible for the elevated FN expression in diabetic nephropathy. The SphK1 pathway and FN expression were examined in streptozotocin-induced diabetic rat kidney and glomerular mesangial cells (GMC) exposed to high glucose (HG). FN up-regulation was concomitant with activation of the SphK1 pathway as reflected in an increase in the expression and activity of SphK1 and sphingosine 1-phosphate (S1P) production in both diabetic kidney and HG-treated GMC. Overexpression of wild-type SphK1 (SphK(WT)) significantly induced FN expression, whereas treatment with a SphK inhibitor, N,N-dimethylsphingosine, or transfection of SphK1 small interference RNA or dominant-negative SphK1 (SphK(G82D)) abolished HG-induced FN expression. Furthermore, addition of exogenous S1P significantly induced FN expression in GMC with an induction of activator protein 1 (AP-1) activity. Inhibition of AP-1 activity by curcumin attenuated the S1P-induced FN expression. Finally, by inhibiting SphK1 activity, both N,N-dimethylsphingosine and SphK(G82D) markedly attenuated the HG-induced AP-1 activity. Taken together, these results demonstrated that the SphK1 pathway plays a critical role in matrix accumulation in GMC under diabetic condition, suggesting that the SphK1 pathway could be a potential therapeutic target for diabetic nephropathy.
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Affiliation(s)
- Tian Lan
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangdong Pharmaceutical University, Guangzhou 510006, China
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Nikzamir A, Esteghamati A, Hammedian AA, Mahmoudi T. The role of vascular endothelial growth factor +405 G/C polymorphism and albuminuria in patients with type 2 diabetes mellitus. Mol Biol Rep 2011; 39:881-6. [PMID: 21562766 DOI: 10.1007/s11033-011-0812-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Accepted: 05/03/2011] [Indexed: 12/15/2022]
Abstract
Observations on the association between the vascular endothelial growth factor (VEGF) gene polymorphism and nephropathy have been inconsistent, which might be due to ethnic and geographical variations. Furthermore, the relationship between +405 G/C polymorphism and albuminuria in the diabetic population has not been sufficiently studied. The aim of this study was to evaluate for the first time the possible association between +405 G/C polymorphism and albuminuria in an population from Tehran of Iran. A total of 255 consecutive patients with type 2 diabetes and microalbuminuria (Group A) and 235 patients with type 2 diabetes and normoalbuminuria (Group B) were included. Polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) were used to detect the VEGF alleles. In univariate analysis, the groups were statistically similar in all variables except for HbA1c (8.53 ± 1.7 in Group A vs. 8.2 ± 1.73 in Group B; P = 0.034), 24-h urinary albumin (201.33 ± 84.8 in Group A vs. 22.88 ± 3.5 in Group B; P < 0.001), and the frequency of GG genotype (31% in Group A vs. 18.7% in Group B; P = 0.006). The GG genotype was the independent predictor of albuminuria [P = 0.014, OR = 1.771, 95% confidence interval (CI) = 1.124-2.790]. Our study showed that the G allele was not associated with albuminuria, but the GG genotype in the VEGF gene is independently associated with development of nephropathy in the our diabetic population.
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Affiliation(s)
- Abdolrahim Nikzamir
- Department of Biochemistry, Faculty of Medicine, Ahvaz Jondi Shapour University of Medical Sciences, Ahvaz, Iran.
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Arya A, Yadav HN, Sharma PL. Involvement of vascular endothelial nitric oxide synthase in development of experimental diabetic nephropathy in rats. Mol Cell Biochem 2011; 354:57-66. [DOI: 10.1007/s11010-011-0805-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Accepted: 03/24/2011] [Indexed: 11/29/2022]
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