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Li Y, Xia T, Li R, Tse G, Liu T, Li G. Renal-Protective Effects of the Peroxisome Proliferator-Activated Receptor-γ Agonist Pioglitazone in ob/ob Mice. Med Sci Monit 2019; 25:1582-1589. [PMID: 30820023 PMCID: PMC6407328 DOI: 10.12659/msm.913461] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Background This study investigated the therapeutic effects of the peroxisome proliferator-activated receptor-γ (PPARγ) agonist pioglitazone in ob/ob mice with obesity-related glomerulopathy (ORG). Material/Methods A total of 24 mice were divided into 3 groups: wild-type C57BL/6 mice (n=8), ob/ob mice (n=8), and ob/ob mice receiving pioglitazone treatment (n=8). Body mass, blood glucose, serum adiponectin (ADP), and urine microalbumin (mALB) levels were determined. Renal histology was examined using light and electron microscopy. Wilms tumor 1 (WT1), Zonula occludens-1 (ZO-1), AMP activated protein kinase (AMPK), and NADPH oxidase-4 (NOX-4) expression were evaluated by immunohistochemistry and Western blot. Results Serum ADP did not alter between weeks 0 and 12 in the control group, while the ob/ob mice showed a time-dependent decrease that was prevented by pioglitazone. Urinary mALB did not alter between week 0 and 12 in the control group, but was higher in week 0 and week 12 in the ob/ob group. Pioglitazone prevented the rise in urinary mALB in week 12. Histology revealed glomerulomegaly, mesangial proliferation, focal segmental glomerulosclerosis, and foot processes fusion in the ob/ob group, which were ameliorated by pioglitazone treatment. Compared to the control group, ob/ob mice had a higher kidney index and glomerular diameter, which were reduced by pioglitazone treatment. Immunohistochemical and Western blot experiments revealed lower expression levels of WT1, ZO-1, and AMPK and higher NOX-4 expression level in the ob/ob group, which was prevented by pioglitazone treatment. Conclusions Pioglitazone, a PPARγ agonist, can prevent ORG, probably by reducing oxidative stress.
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Affiliation(s)
- Ying Li
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China (mainland).,Department of Nephrology, Second Hospital of Tianjin Medical University, Tianjin, China (mainland)
| | - Tian Xia
- Department of Nephrology, Second Hospital of Tianjin Medical University, Tianjin, China (mainland)
| | - Rong Li
- Department of Nephrology, Second Hospital of Tianjin Medical University, Tianjin, China (mainland)
| | - Gary Tse
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong, Hong Kong.,Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong, China (mainland)
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China (mainland)
| | - Guangping Li
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China (mainland)
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Sakai T, Imai J, Takagaki H, Ui M, Hatta S. Cytoplasmic OH scavenger TA293 attenuates cellular senescence and fibrosis by activating macrophages through oxidized phospholipids/TLR4. Life Sci 2019; 221:284-292. [DOI: 10.1016/j.lfs.2019.02.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/05/2019] [Accepted: 02/17/2019] [Indexed: 01/19/2023]
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Lee ES, Kwon MH, Kim HM, Kim N, Kim YM, Kim HS, Lee EY, Chung CH. Dibenzoylmethane ameliorates lipid-induced inflammation and oxidative injury in diabetic nephropathy. J Endocrinol 2019; 240:169-179. [PMID: 30475214 DOI: 10.1530/joe-18-0206] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 10/31/2018] [Indexed: 11/08/2022]
Abstract
Dibenzoylmethane (DBM) is a beta-diketone analog of curcumin. Numerous studies have shown the beneficial effects of curcumin on diabetes, obesity and diabetic complications including diabetic nephropathy. Recently, we investigated the beneficial metabolic effects of DBM on high-fat diet-induced obesity. However, the effects and mechanisms of action of DBM in the kidney are currently unknown. To investigate the renoprotective effects of DBM in type 2 diabetes, we administered DBM (100 mg/kg) orally for 12 weeks to high-fat diet-induced diabetic model mice. We used mouse renal mesangial (MES13) and macrophage (RAW 264.7) cells to examine the mechanism of action of DBM (20 μM). After DBM treatment, the albumin-to-creatinine ratio was significantly decreased compared to that of the high-fat-diet group. Moreover, damaged renal ultra-structures and functions including increased glomerular volume, glomerular basement membrane thickness and inflammatory signals were ameliorated after DBM treatment. Stimulation of MES13 and RAW264.7 cells by palmitate or high-dose glucose with lipopolysaccharides increased inflammatory signals and macrophage migration. However, these changes were reversed by DBM treatment. In addition, DBM inhibited NADPH oxidase 2 and 4 expression and oxidative DNA damage. Collectively, these data suggested that DBM prevented diabetes-induced renal injury through its anti-inflammatory and antioxidant effects.
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Affiliation(s)
- Eun Soo Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Mi-Hye Kwon
- The East Coast Research Institute of Life Science, Gangneung-Wonju National University, Gangneung, Korea
| | - Hong Min Kim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Nami Kim
- Department of Anatomy, Korea University College of Medicine, Seoul, Korea
| | - You Mi Kim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Hyeon Soo Kim
- Department of Anatomy, Korea University College of Medicine, Seoul, Korea
| | - Eun Young Lee
- Department of Internal Medicine and Institute of Tissue Regeneration, Soonchunhyang University, Cheonan, Korea
| | - Choon Hee Chung
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
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Yaribeygi H, Atkin SL, Sahebkar A. A review of the molecular mechanisms of hyperglycemia-induced free radical generation leading to oxidative stress. J Cell Physiol 2019; 234:1300-1312. [PMID: 30146696 DOI: 10.1002/jcp.27164] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 07/10/2018] [Indexed: 12/16/2022]
Abstract
The prevalence of diabetes is growing worldwide with an increasing morbidity and mortality associated with the development of diabetes complications. Free radical production is a normal biological process that is strictly controlled and has been shown to be important in normal cellular homeostasis, and in the bodies response to pathogens. However, there are several mechanisms leading to excessive free radical production that overcome the normal protective quenching mechanisms. Studies have shown that many of the diabetes complications result from excessive free radical generation and oxidative stress, and it has been shown that chronic hyperglycemia is a potent inducer for free radical production, generated through several pathways and triggering multiple molecular mechanisms. An understanding of these processes may help us to improving our preventive or therapeutic strategies. In this review, the major molecular pathways involved in free radical generation induced by hyperglycemia are described.
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Affiliation(s)
- Habib Yaribeygi
- Chronic Kidney Disease Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Amirhossein Sahebkar
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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Akoumianakis I, Antoniades C. Impaired Vascular Redox Signaling in the Vascular Complications of Obesity and Diabetes Mellitus. Antioxid Redox Signal 2019; 30:333-353. [PMID: 29084432 DOI: 10.1089/ars.2017.7421] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Significance: Oxidative stress, a crucial regulator of vascular disease pathogenesis, may be involved in the vascular complications of obesity, systemic insulin resistance (IR), and diabetes mellitus (DM). Recent Advances: Excessive production of reactive oxygen species in the vascular wall has been linked with vascular disease pathogenesis. Recent evidence has revealed that vascular redox state is dysregulated in cases of obesity, systemic IR, and DM, potentially participating in the well-known vascular complications of these disease entities. Critical Issues: The detrimental effects of obesity and the metabolic syndrome on vascular biology have been extensively described at a clinical level. Further, vascular oxidative stress has often been associated with the presence of obesity and IR as well as with a variety of detrimental vascular phenotypes. However, the mechanisms of vascular redox state regulation under conditions of obesity and systemic IR, as well as their clinical relevance, are not adequately explored. In addition, the notion of vascular IR, and its relationship with systemic parameters of obesity and systemic IR, is not fully understood. In this review, we present all the important components of vascular redox state and the evidence linking oxidative stress with obesity and IR. Future Directions: Future studies are required to describe the cellular effects and the translational potential of vascular redox state in the context of vascular disease. In addition, further elucidation of the direct vascular effects of obesity and IR is required for better management of the vascular complications of DM.
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Affiliation(s)
- Ioannis Akoumianakis
- Division of Cardiovascular Medicine, University of Oxford , Oxford, United Kingdom
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Abstract
Reactive oxygen species (ROS) are highly reactive oxygen derivatives. Initially, they were considered as metabolic by-products (of mitochondria in particular), which consistently lead to aging and disease. Over the last decades, however, it became increasingly apparent that virtually all eukaryotic cells possess specifically ROS-producing enzymes, namely, NOX NADPH oxidases. In most mammals, there are seven NOX isoforms: three closely related isoforms, NOX1, 2, 3, which are activated by cytoplasmic subunits; NOX4, which appears to be constitutively active; and the EF-hand-containing Ca2+-activated isoforms NOX5 and DUOX1 and 2. Loss-of-function mutations in NOX genes can lead to serious human disease. NOX2 deficiency leads to primary immune deficiency, while DUOX2 deficiency presents as congenital hypothyroidism. Nox-deficient mice provide important tools to explore the physiological functions of various NADPH oxidases as a loss of function in Nox2, Nox3, and Duox2 leads to a spontaneous phenotype. The genetic absence of Nox1, Nox4, and Duox1 does not result in an obvious mouse phenotype (the NOX5 gene is absent in rodents and can therefore not be studied using knockout mice). Since the discovery of the NOX family at the turn of the millennium, much progress in understanding the biochemistry and the physiology of NOX has been made; however many questions remain unanswered to date. This chapter is an overview of our present knowledge on mammalian NOX/DUOX enzymes.
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Affiliation(s)
- Hélène Buvelot
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
| | - Vincent Jaquet
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Karl-Heinz Krause
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
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Zhai R, Jian G, Chen T, Xie L, Xue R, Gao C, Wang N, Xu Y, Gui D. Astragalus membranaceus and Panax notoginseng, the Novel Renoprotective Compound, Synergistically Protect against Podocyte Injury in Streptozotocin-Induced Diabetic Rats. J Diabetes Res 2019; 2019:1602892. [PMID: 31179338 PMCID: PMC6501154 DOI: 10.1155/2019/1602892] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 03/06/2019] [Indexed: 01/06/2023] Open
Abstract
This study was aimed at investigating the synergistical protective effects of Astragalus membranaceus (AG) and Panax notoginseng (NG) on podocyte injury in diabetic rats. Diabetes was induced in rats by a single intraperitoneal injection of streptozotocin at 55 mg/kg. Diabetic rats were then orally administrated with losartan, AG, NG, and AG plus NG (2 : 1) for 12 weeks. Albuminuria, biochemical markers, renal histopathology, and podocyte number per glomerulus were measured. Podocyte apoptosis was determined by triple immunofluorescence labeling including TUNEL assay, WT1, and DAPI. Renal expression of nephrin, α-dystroglycan, Bax, Bcl-xl, and Nox4 was evaluated by immunohistochemistry, western blot, and RT-PCR. AG plus NG ameliorated albuminuria, renal histopathology, and podocyte foot process effacement to a greater degree than did AG or NG alone. The number of podocytes per glomerulus, as well as renal expression of nephrin, α-dystroglycan, and Bcl-xl, was decreased, while podocyte apoptosis, as well as renal expression of Bax and Nox4, was increased in diabetic rats. All of these abnormalities were partially restored by AG plus NG to a greater degree than did AG or NG alone. In conclusion, AG and NG synergistically ameliorated diabetic podocyte injury partly through upregulation of nephrin, α-dystroglycan, and Bcl-xl, as well as downregulation of Bax and Nox4. These findings might provide a novel treatment combination for DN.
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Affiliation(s)
- Ruonan Zhai
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Guihua Jian
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Teng Chen
- Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Ling Xie
- Shanghai Ocean University, Shanghai 201306, China
| | - Rui Xue
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Chongting Gao
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Niansong Wang
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Youhua Xu
- Faculty of Chinese Medicine, State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Taipa, Macao 999078, China
| | - Dingkun Gui
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
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Yi J, Yuan Y, Zheng J, Zhao T. Hydrogen sulfide alleviates uranium-induced rat hepatocyte cytotoxicity via inhibiting Nox4/ROS/p38 MAPK pathway. J Biochem Mol Toxicol 2018; 33:e22255. [PMID: 30368988 DOI: 10.1002/jbt.22255] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 09/18/2018] [Accepted: 10/01/2018] [Indexed: 11/06/2022]
Abstract
As a gasotransmitter, hydrogen sulfide (H2 S) plays a crucial role in regulating the signaling pathway mediated by oxidative stress. The purpose of this study was to investigate the protective effects of H 2 S on uranium-induced rat hepatocyte cytotoxicity. Primary hepatocytes were isolated and cultured from Sprague Dawley rat liver tissues. After pretreating with sodium hydrosulfide (an H 2 S donor) for 1 hour (or GKT-136901 for 30 minutes), hepatocytes were treated by uranyl acetate for 24 hours. Cell viability, reactive oxygen species (ROS), malondialdehyde (MDA), NADPH oxidase 4 (Nox4), and p38 mitogen-activated protein kinase (p38 MAPK) phosphorylation were respectively determined. The effects of direct inhibition of Nox4 expression by GKT-136901 (a Nox4 inhibitor) on ROS and phospho-p38 MAPK levels were examined in uranium-treated hepatocytes. The results implicate that H 2 S can afford protection of rat hepatocytes against uranium-induced adverse effects through attenuating oxidative stress via prohibiting Nox4/ROS/p38 MAPK signaling.
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Affiliation(s)
- Juan Yi
- Department and Institute of Biology, School of Pharmaceutical and Biological Science, University of South China, Hengyang, China
| | - Yan Yuan
- Department and Institute of Biology, School of Pharmaceutical and Biological Science, University of South China, Hengyang, China
| | - Jifang Zheng
- Department and Institute of Biology, School of Pharmaceutical and Biological Science, University of South China, Hengyang, China
| | - Tingting Zhao
- Department and Institute of Biology, School of Pharmaceutical and Biological Science, University of South China, Hengyang, China
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Long-Term Administration of Angiotensin (1-7) to db/db Mice Reduces Oxidative Stress Damage in the Kidneys and Prevents Renal Dysfunction. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:1841046. [PMID: 30425780 PMCID: PMC6218718 DOI: 10.1155/2018/1841046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 09/04/2018] [Accepted: 09/11/2018] [Indexed: 02/06/2023]
Abstract
Aims The goal of this study was to evaluate the effects of long-term (16 weeks) administration of angiotensin (1–7) [A(1–7)] on kidney function in db/db mice and to identify the protective mechanisms of this therapy. Methods db/db mice and heterozygous controls were treated with A(1–7) or vehicle daily, subcutaneously for up to 16 weeks. Kidney injury was assessed by measuring blood flow in renal arteries, plasma creatinine levels, and proteinuria. Effects of treatment on oxidative stress were evaluated by histological staining and gene expression. Results 16 weeks of daily administration of A(1–7) to a mouse model of severe type 2 diabetes (db/db) prevented the progression of kidney damage. Treatment with A(1–7) improved blood flow in the renal arteries, as well as decreased plasma creatinine levels and proteinuria in diabetic mice. Reduction of oxidative stress was identified as one of the mechanisms of the renoprotective action of A(1–7). Treatment prevented formation of nitrotyrosine residues, a marker of oxidative stress damage. A(1–7) also reduced the expression of two enzymes involved in formation of nitrotyrosine, namely, eNOS and NOX-4. A(1–7) regulated the phosphorylation pattern of eNOS to enhance production of NO in diabetic animals, possibly through the Akt pathway. However, these elevated levels of NO did not result in increased nitrosylation, possibly due to reduced NOX-4 levels. Conclusions Long-term administration of A(1–7) improved kidney function and reduced oxidative stress damage in db/db mice.
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SOCS1-targeted therapy ameliorates renal and vascular oxidative stress in diabetes via STAT1 and PI3K inhibition. J Transl Med 2018; 98:1276-1290. [PMID: 29540859 DOI: 10.1038/s41374-018-0043-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 01/30/2018] [Accepted: 01/31/2018] [Indexed: 12/19/2022] Open
Abstract
Oxidative stress resulting from excessive production of reactive oxygen species (ROS) or impaired antioxidant defenses is closely related to the development of diabetic vascular complications, including nephropathy and atherosclerosis. Chronic activation of Janus kinase/Signal transducer and activator of transcription (JAK/STAT) signaling pathway contributes to diabetic complications by inducing expression of genes involved in cell proliferation, fibrosis, inflammation, and oxidative stress. Suppressors of cytokine signaling (SOCS) family of endogenous JAK/STAT regulators is an attractive target for therapeutic intervention. We investigated the beneficial effect of two different SOCS1-targeted therapies (adenovirus-mediated gene transfer and kinase-inhibitory region peptidomimetic) to combat oxidative stress injury in an experimental diabetes model of concomitant renal and macrovascular disease (streptozotocin-induced diabetic apolipoprotein E-deficient mouse). Diabetes resulted in progressive alteration of redox balance in mice, as demonstrated by increased ROS levels and decreased antioxidant activity, which ultimately led to renal dysfunction and vascular injury. The molecular and pathological alterations in early diabetes were partially reversed by preventive intervention with SOCS1-targeted therapies. Importantly, SOCS1 peptidomimetic provided reno- and atheroprotection in diabetic mice even in a setting of established disease. Compared with untreated controls, kidney and aorta from SOCS1-treated mice exhibited significantly lower levels of superoxide anion, DNA oxidation marker and NADPH oxidase (Nox) subunits, along with higher expression of antioxidant enzymes. These trends correlated with a reduction in parameters of renal damage (albuminuria, creatinine and tubular injury), atherosclerosis (lesion size) and inflammation (leukocytes and chemokines). Mechanistic studies in renal, vascular and phagocytic cells exposed to cytokines and high-glucose showed that SOCS1 blocked ROS generation by inhibiting both Nox complex assembly and Nox subunit expression, an effect mediated by inactivation of JAK2, STAT1, and PI3K signaling pathways. This study provides evidence for SOCS1-targeted therapies, especially SOCS1 peptidomimetic, as an alternative antioxidant strategy to limit the progression of diabetic micro- and macrovascular complications.
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111
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miR-423-5p suppresses high-glucose-induced podocyte injury by targeting Nox4. Biochem Biophys Res Commun 2018; 505:339-345. [PMID: 30245133 DOI: 10.1016/j.bbrc.2018.09.067] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 09/11/2018] [Indexed: 01/12/2023]
Abstract
Podocyte injury plays crucial roles in the pathogenesis of diabetic nephropathy (DN). Aberrant microRNAs (miRNAs) have been suggested to contribute to podocyte injury. However, whether miR-423-5p could alleviate high glucose (HG)-mediated podocyte injury and the underlying mechanisms remains unclear. In this study, we found that patients with DN have reduced miR-423-5p and elevated Nicotinamide adenine dinucleotide phosphate oxidase 4 (Nox4) expressions in clinical renal tissues, and HG induced Nox4 but suppressed miR-423-5p expressions in cultured podocytes in a time-dependent manner. Moreover, overexpression of miR-423-5p antagonized HG-stimulated podocyte injury by enhancing cell viability, inhibiting reactive oxygen species (ROS) production, suppressing cell apoptosis, reducing inflammatory activity, and repressing cytoskeleton damage accompanied with alternations of podocyte specific proteins. Furthermore, functional assays substantiated that Nox4 was a direct target and negatively regulated by miR-423-5p. Additionally, restoration of Nox4 impeded the protective effect of miR-423-5p on podocyte injury via activation of p38 MAPK pathway. Therefore, this study manifested that miR-423-5p overexpression protected HG-induced podocyte damage by inhibiting ROS generation via targeting Nox4, providing a potential therapeutic strategy against DN.
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112
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A causal link between oxidative stress and inflammation in cardiovascular and renal complications of diabetes. Clin Sci (Lond) 2018; 132:1811-1836. [PMID: 30166499 DOI: 10.1042/cs20171459] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/22/2018] [Accepted: 07/26/2018] [Indexed: 12/14/2022]
Abstract
Chronic renal and vascular oxidative stress in association with an enhanced inflammatory burden are determinant processes in the development and progression of diabetic complications including cardiovascular disease (CVD), atherosclerosis and diabetic kidney disease (DKD). Persistent hyperglycaemia in diabetes mellitus increases the production of reactive oxygen species (ROS) and activates mediators of inflammation as well as suppresses antioxidant defence mechanisms ultimately contributing to oxidative stress which leads to vascular and renal injury in diabetes. Furthermore, there is increasing evidence that ROS, inflammation and fibrosis promote each other and are part of a vicious connection leading to development and progression of CVD and kidney disease in diabetes.
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Muñoz M, Martínez MP, López-Oliva ME, Rodríguez C, Corbacho C, Carballido J, García-Sacristán A, Hernández M, Rivera L, Sáenz-Medina J, Prieto D. Hydrogen peroxide derived from NADPH oxidase 4- and 2 contributes to the endothelium-dependent vasodilatation of intrarenal arteries. Redox Biol 2018; 19:92-104. [PMID: 30125808 PMCID: PMC6105769 DOI: 10.1016/j.redox.2018.08.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 08/03/2018] [Accepted: 08/06/2018] [Indexed: 01/17/2023] Open
Abstract
The role of NADPH oxidase (Nox)-derived reactive oxygen species in kidney vascular function has extensively been investigated in the harmful context of oxidative stress in diabetes and obesity-associated kidney disease. Since hydrogen peroxide (H2O2) has recently been involved in the non-nitric oxide (NO) non-prostanoid relaxations of intrarenal arteries, the present study was sought to investigate whether NADPH oxidases may be functional sources of vasodilator H2O2 in the kidney and to assess their role in the endothelium-dependent relaxations of human and rat intrarenal arteries. Renal interlobar arteries isolated from the kidney of renal tumor patients who underwent nephrectomy, and from the kidney of Wistar rats, were mounted in microvascular myographs to assess function. Superoxide (O2.-) and H2O2 production was measured by chemiluminescence and Amplex Red fluorescence, and Nox2 and Nox4 enzymes were detected by Western blotting and by double inmunolabeling along with eNOS. Nox2 and Nox4 proteins were expressed in the endothelium of renal arterioles and glomeruli co-localized with eNOS, levels of expression of both enzymes being higher in the cortex than in isolated arteries. Pharmacological inhibition of Nox with apocynin and of CYP 2C epoxygenases with sulfaphenazol, but not of the NO synthase (NOS), reduced renal NADPH-stimulated O2.- and H2O2 production. Under conditions of cyclooxygenase and NOS blockade, acetylcholine induced endothelium-dependent relaxations that were blunted by the non-selective Nox inhibitor apocynin and by the Nox2 or the Nox1/4 inhibitors gp91ds-tat and GKT136901, respectively. Acetylcholine stimulated H2O2 production that was reduced by gp91ds-tat and by GKT136901. These results suggest the specific involvement of Nox4 and Nox2 subunits as physiologically relevant endothelial sources of H2O2 generation that contribute to the endothelium-dependent vasodilatation of renal arteries and therefore have a protective role in kidney vasculature.
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Affiliation(s)
- Mercedes Muñoz
- Departamento de Fisiología, Facultad de Farmacia, Universidad Complutense, Madrid, Spain
| | - María Pilar Martínez
- Departamento de Anatomía y Embriología, Facultad de Veterinaria, Universidad Complutense, Madrid, Spain
| | | | - Claudia Rodríguez
- Departamento de Fisiología, Facultad de Farmacia, Universidad Complutense, Madrid, Spain
| | - César Corbacho
- Departamento de Anatomía Patológica, Hospital Universitario Puerta de Hierro-Majadahonda, Madrid, Spain
| | - Joaquín Carballido
- Departamento de Urología, Hospital Universitario Puerta de Hierro-Majadahonda, Madrid, Spain
| | | | - Medardo Hernández
- Departamento de Fisiología, Facultad de Farmacia, Universidad Complutense, Madrid, Spain
| | - Luis Rivera
- Departamento de Fisiología, Facultad de Farmacia, Universidad Complutense, Madrid, Spain
| | - Javier Sáenz-Medina
- Departamento de Urología, Hospital Universitario Puerta de Hierro-Majadahonda, Madrid, Spain
| | - Dolores Prieto
- Departamento de Fisiología, Facultad de Farmacia, Universidad Complutense, Madrid, Spain.
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Wang Z, Zhang J, Wang L, Li W, Chen L, Li J, Zhao D, Zhang H, Guo X. Glycine mitigates renal oxidative stress by suppressing Nox4 expression in rats with streptozotocin-induced diabetes. J Pharmacol Sci 2018; 137:387-394. [DOI: 10.1016/j.jphs.2018.08.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 08/12/2018] [Accepted: 08/14/2018] [Indexed: 01/15/2023] Open
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115
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Moonen L, D'Haese PC, Vervaet BA. Epithelial Cell Cycle Behaviour in the Injured Kidney. Int J Mol Sci 2018; 19:E2038. [PMID: 30011818 PMCID: PMC6073451 DOI: 10.3390/ijms19072038] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 07/10/2018] [Indexed: 02/06/2023] Open
Abstract
Acute kidney injury (AKI), commonly caused by ischemia-reperfusion injury, has far-reaching health consequences. Despite the significant regenerative capacity of proximal tubular epithelium cells (PTCs), repair frequently fails, leading to the development of chronic kidney disease (CKD). In the last decade, it has been repeatedly demonstrated that dysregulation of the cell cycle can cause injured kidneys to progress to CKD. More precisely, severe AKI causes PTCs to arrest in the G1/S or G2/M phase of the cell cycle, leading to maladaptive repair and a fibrotic outcome. The mechanisms causing these arrests are far from known. The arrest might, at least partially, be attributed to DNA damage since activation of the DNA-damage response pathway leads to cell cycle arrest. Alternatively, cytokine signalling via nuclear factor kappa beta (NF-κβ) and p38-mitogen-activated protein kinase (p38-MAPK) pathways, and reactive oxygen species (ROS) can play a role independent of DNA damage. In addition, only a handful of cell cycle regulators (e.g., p53, p21) have been thoroughly studied during renal repair. Still, why and how PTCs decide to arrest their cell cycle and how this arrest can efficiently be overcome remain open and challenging questions. In this review we will discuss the evidence for cell cycle involvement during AKI and development of CKD together with putative therapeutic approaches.
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Affiliation(s)
- Lies Moonen
- Laboratory of Pathophysiology, Department of Biomedical Sciences, University of Antwerp, 2000 Antwerp, Belgium.
| | - Patrick C D'Haese
- Laboratory of Pathophysiology, Department of Biomedical Sciences, University of Antwerp, 2000 Antwerp, Belgium.
| | - Benjamin A Vervaet
- Laboratory of Pathophysiology, Department of Biomedical Sciences, University of Antwerp, 2000 Antwerp, Belgium.
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116
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Maslanka R, Kwolek-Mirek M, Zadrag-Tecza R. Consequences of calorie restriction and calorie excess for the physiological parameters of the yeast Saccharomyces cerevisiae cells. FEMS Yeast Res 2018; 17:4628043. [PMID: 29145638 DOI: 10.1093/femsyr/fox087] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 11/13/2017] [Indexed: 12/28/2022] Open
Abstract
Glucose plays an important role in cell metabolism and has an impact on cellular physiology. Changes in glucose availability may strongly influence growth rate of the cell size, cell metabolism and the rate of generation of cellular by-products, such as reactive oxygen species. The positive effect of low glucose concentration conditions-calorie restriction is observed in a wide range of species, including the Saccharomyces cerevisiae yeast, yet little is known about the effect of high glucose concentrations-calorie excess. Such analysis seems to be particularly important due to recently common problem of diabetes and obesity. The effect of glucose on morphological and physiological parameters of the yeast cell was conducted using genetic alteration (disruption of genes involved in glucose signalling) and calorie restriction and calorie excess conditions. The results show a significant relationship among extracellular glucose concentration, cell size and reactive oxygen species generation in yeast cells. Furthermore, the results obtained through the use of mutant strains with disorders in glucose signalling pathways suggest that the intracellular level of glucose is more important than its extracellular concentration. These data also suggest that the calorie excess as a factor, which has a significant impact on cell physiology, requires further comprehensive analyses.
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Affiliation(s)
- Roman Maslanka
- University of Rzeszow, Faculty of Biology and Agriculture, Department of Biochemistry and Cell Biology, Zelwerowicza 4, 35-601 Rzeszow, Poland
| | - Magdalena Kwolek-Mirek
- University of Rzeszow, Faculty of Biology and Agriculture, Department of Biochemistry and Cell Biology, Zelwerowicza 4, 35-601 Rzeszow, Poland
| | - Renata Zadrag-Tecza
- University of Rzeszow, Faculty of Biology and Agriculture, Department of Biochemistry and Cell Biology, Zelwerowicza 4, 35-601 Rzeszow, Poland
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117
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Sureshbabu A, Patino E, Ma KC, Laursen K, Finkelsztein EJ, Akchurin O, Muthukumar T, Ryter SW, Gudas L, Choi AMK, Choi ME. RIPK3 promotes sepsis-induced acute kidney injury via mitochondrial dysfunction. JCI Insight 2018; 3:98411. [PMID: 29875323 PMCID: PMC6124406 DOI: 10.1172/jci.insight.98411] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 05/01/2018] [Indexed: 12/29/2022] Open
Abstract
Sepsis causes acute kidney injury (AKI) in critically ill patients, although the pathophysiology remains unclear. The receptor-interacting protein kinase-3 (RIPK3), a cardinal regulator of necroptosis, has recently been implicated in the pathogenesis of human disease. In mice subjected to polymicrobial sepsis, we demonstrate that RIPK3 promotes sepsis-induced AKI. Utilizing genetic deletion and biochemical approaches in vitro and in vivo, we identify a potentially novel pathway by which RIPK3 aggravates kidney tubular injury independently of the classical mixed lineage kinase domain-like protein-dependent (MLKL-dependent) necroptosis pathway. In kidney tubular epithelial cells, we show that RIPK3 promotes oxidative stress and mitochondrial dysfunction involving upregulation of NADPH oxidase-4 (NOX4) and inhibition of mitochondrial complex I and -III, and that RIPK3 and NOX4 are critical for kidney tubular injury in vivo. Furthermore, we demonstrate that RIPK3 is required for increased mitochondrial translocation of NOX4 in response to proinflammatory stimuli, by a mechanism involving protein-protein interactions. Finally, we observed elevated urinary and plasma RIPK3 levels in human patients with sepsis-induced AKI, representing potential markers of this condition. In conclusion, we identify a pathway by which RIPK3 promotes kidney tubular injury via mitochondrial dysfunction, independently of MLKL, which may represent a promising therapeutic target in sepsis-induced AKI.
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Affiliation(s)
| | - Edwin Patino
- Division of Nephrology and Hypertension, Joan and Sanford I. Weill Department of Medicine, Weill Cornell Medicine, New York, New York, USA
| | - Kevin C Ma
- Division of Pulmonary and Critical Care Medicine, and
| | | | | | | | - Thangamani Muthukumar
- Division of Nephrology and Hypertension, Joan and Sanford I. Weill Department of Medicine, Weill Cornell Medicine, New York, New York, USA.,NewYork-Presbyterian Hospital, Weill Cornell Medical Center, New York, New York, USA
| | | | | | - Augustine M K Choi
- Division of Pulmonary and Critical Care Medicine, and.,NewYork-Presbyterian Hospital, Weill Cornell Medical Center, New York, New York, USA
| | - Mary E Choi
- Division of Nephrology and Hypertension, Joan and Sanford I. Weill Department of Medicine, Weill Cornell Medicine, New York, New York, USA.,NewYork-Presbyterian Hospital, Weill Cornell Medical Center, New York, New York, USA
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118
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Kawamorita Y, Shiraishi T, Tamura Y, Kumagai T, Shibata S, Fujigaki Y, Hosoyamada M, Nakagawa T, Uchida S. Renoprotective effect of topiroxostat via antioxidant activity in puromycin aminonucleoside nephrosis rats. Physiol Rep 2018; 5:5/15/e13358. [PMID: 28774949 PMCID: PMC5555887 DOI: 10.14814/phy2.13358] [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: 03/13/2017] [Revised: 06/19/2017] [Accepted: 06/25/2017] [Indexed: 02/07/2023] Open
Abstract
Topiroxostat is a novel inhibitor of xanthine oxidase, and is postulated to exert a renoprotective effect. Puromycin aminonucleoside nephrosis (PAN) is a rat model of minimal change nephrotic syndrome. In this study, we examined whether topiroxostat ameliorates the kidney injury in PAN rats that was induced by a single intraperitoneal injection of PA (100 mg/kg body weight). Rats were divided into four groups: control rats, PAN rats, control rats treated with topiroxostat (1.0 mg/kg/day), and PAN rats treated with topiroxostat. Topiroxostat significantly reduced the amount of uric acid in the kidney cortex, while serum UA concentration remained unaffected by this treatment. Urinary protein excretion decreased significantly on day 10 in PAN rats upon topiroxostat treatment. Podocyte injury in PAN rats, as indicated by the reduction in WT‐1‐positive cell numbers and podocin immunoreactivity and foot process effacement, was partially yet significantly alleviated with topiroxostat treatment. In the kidney cortex, the increase in oxidative stress markers such as nitrotyrosine and 8‐hydroxy‐2‐deoxyguanosine (8‐OHdG) and the enhanced expressions of xanthine oxidase and NADPH oxidase 4 (NOX4) in PAN rats were significantly ameliorated by topiroxostat. Using cultured podocytes NOX4 expression was upregulated by adding 12 mg/dL UA into the culture medium. These results suggest that topiroxostat ameliorates proteinuria and kidney injury in PAN rats by lowering oxidative stress and tissue UA concentration. The renoprotective effects of topiroxostat could be attributed to its potential to inhibit xanthine oxidase and NOX4 in concert with suppression of intracellular UA production.
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Affiliation(s)
- Yosuke Kawamorita
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Takeshi Shiraishi
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan.,Support for Community Medicine Endowed Chair, Teikyo University School of Medicine, Tokyo, Japan
| | - Yoshifuru Tamura
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Takanori Kumagai
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan.,Support for Community Medicine Endowed Chair, Teikyo University School of Medicine, Tokyo, Japan
| | - Shigeru Shibata
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Yoshihide Fujigaki
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Makoto Hosoyamada
- Department of Human Physiology and Pathology, Faculty of Pharma-Sciences, Teikyo University, Tokyo, Japan
| | - Takahiko Nakagawa
- Industry-Academia-Government Association Promotion Center, Nara Medical University, Nara, Japan
| | - Shunya Uchida
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan
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119
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Yaribeygi H, Mohammadi MT, Rezaee R, Sahebkar A. Fenofibrate improves renal function by amelioration of NOX-4, IL-18, and p53 expression in an experimental model of diabetic nephropathy. J Cell Biochem 2018; 119:7458-7469. [PMID: 29761900 DOI: 10.1002/jcb.27055] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 04/23/2018] [Indexed: 12/22/2022]
Abstract
Among several pathological mechanisms involved in diabetic nephropathy, oxidative stress, inflammation, and apoptosis play a prominent role. Fenofibrate, a peroxisome proliferator-activated receptor-α (PPAR-α) agonist, has markedly improved oxidative stress and inflammatory responses, but there is no evidence about its effects on interleukin-18 (IL-18), NADPH oxidase type 4 (NOX-4), and p53 expression in diabetic kidneys. The aim of this study was to evaluate possible effects of fenofibrate on improving the underlying mechanisms of diabetic nephropathy. Male Wistar rats were randomly divided into four groups namely, normal, normal treated, diabetic and diabetic treated (N = 6). Diabetes was induced by a single dose of streptozotocin (40 mg/kg; IV). Treated animals received fenofibrate for 8 weeks daily (80 mg/kg; po). All groups were sacrificed on day 56 and blood, urine, and tissue samples were collected. Serum levels of urea, uric acid, creatinine, and glucose were assessed. Then, serum levels of malondialdehyde (MDA), nitrate, and glutathione (GLT), as well as the activities of catalase (CAT) and superoxide dismutase (SOD) enzymes were measured. The expression level of NOX-4, IL-18, and p53 proteins at both mRNA and protein levels were evaluated. Diabetes significantly increased albuminuria, free radicals production, inflammation, and apoptosis in non-treated rats while lowered antioxidant capacity. Moreover, diabetes caused histological damages leading to renal failure. Treatment with fenofibrate improved renal function by improving creatinine clearance (P = 0.01) and protein excretion (P = 0.001) and lowering plasma levels of blood urea nitrogen (P = 0.001), creatinine (P = 0.001), and uric acid (P = 0.01). Fenofibrate potentiated antioxidant defense systems by enhancing CAT (P = 0.01) and SOD (P = 0.01) enzymes activities and GLT content (P = 0.01), and reduced oxidative damage by lowering MDA generation (P = 0.02). Fenofibrate also attenuated the expression of NOX-4 (P = 0.05), IL-18 (P = 0.05), and p53 (P = 0.05) at both mRNA and protein levels. In conclusion, treatment with fenofibrate improved renal function by suppression of oxidative stress, attenuation of inflammation, and inhibition of apoptosis.
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Affiliation(s)
- Habib Yaribeygi
- Neurosciences Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.,Chronic Kidney Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad T Mohammadi
- Chronic Kidney Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Health Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Ramin Rezaee
- Clinical Research Unit, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amirhossein Sahebkar
- Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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120
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Qiao X, Wang L, Wang Y, Su X, Qi Y, Fan Y, Peng Z. Intermedin inhibits unilateral ureteral obstruction-induced oxidative stress via NADPH oxidase Nox4 and cAMP-dependent mechanisms. Ren Fail 2018; 39:652-659. [PMID: 28805491 PMCID: PMC6447914 DOI: 10.1080/0886022x.2017.1361839] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
NADPH oxidase Nox4-derived reactive oxygen species (ROS) play important roles in renal fibrosis. Our previous study demonstrated that intermedin (IMD) alleviated unilateral ureteral obstruction (UUO)-induced renal fibrosis by inhibition of ROS. However, the precise mechanisms remain unclear. Herein, we investigated the effect of IMD on Nox4 expression and NADPH oxidase activity in rat UUO model, and explored if these effect were achieved through cAMP-PKA pathway, the important post-receptor signal transduction pathway of IMD, in TGF-β1-stimulated rat proximal tubular cell (NRK-52E). Renal fibrosis was induced by UUO. NRK-52E was exposed to rhTGF-β1 to establish an in vitro model of fibrosis. IMD was overexpressed in the kidney and in NRK-52E by IMD gene transfer. We studied UUO-induced ROS by measuring dihydroethidium levels and lipid peroxidation end-product 4-hydroxynonenal expression. Nox4 expression in the obstructed kidney of UUO rat or in TGF-β1-stimulated NRK-52E was measured by quantitative RT-PCR and Western blotting. We analyzed NADPH oxidase activity using a lucigenin-enhanced chemiluminescence system. We showed that UUO-stimulated ROS production was remarkably attenuated by IMD gene transfer. IMD overexpression inhibited UUO-induced up-regulation of Nox4 and activation of NADPH oxidase. Consistent with in vivo results, TGF-β1-stimulated increase in Nox4 expression and NADPH oxidase activity was blocked by IMD. In NRK-52E, these beneficial effects of IMD were abolished by pretreatment with N-[2-(p-bromocinnamylamino)ethyl]-5-isoquinolinesulfonamide hydrochloride (H-89), a PKA inhibitor, and mimicked by a cell-permeable cAMP analog dibutyl-cAMP. Our results indicate that IMD exerts anti-oxidant effects by inhibition of Nox4, and the effect can be mediated by cAMP-PKA pathway.
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Affiliation(s)
- Xi Qiao
- a Department of Nephrology , Second Hospital of Shanxi Medical University , Shanxi , China.,b Shanxi Kidney Disease Institute , Shanxi , China
| | - Lihua Wang
- a Department of Nephrology , Second Hospital of Shanxi Medical University , Shanxi , China.,b Shanxi Kidney Disease Institute , Shanxi , China
| | - Yanhong Wang
- c Department of Microbiology and Immunology , Shanxi Medical University , Taiyuan , Shanxi , China
| | - Xiaole Su
- a Department of Nephrology , Second Hospital of Shanxi Medical University , Shanxi , China.,b Shanxi Kidney Disease Institute , Shanxi , China
| | - Yue Qi
- a Department of Nephrology , Second Hospital of Shanxi Medical University , Shanxi , China.,b Shanxi Kidney Disease Institute , Shanxi , China
| | - Yun Fan
- a Department of Nephrology , Second Hospital of Shanxi Medical University , Shanxi , China.,b Shanxi Kidney Disease Institute , Shanxi , China
| | - Zhiqiang Peng
- a Department of Nephrology , Second Hospital of Shanxi Medical University , Shanxi , China.,b Shanxi Kidney Disease Institute , Shanxi , China
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121
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Schiattarella GG, Carrizzo A, Ilardi F, Damato A, Ambrosio M, Madonna M, Trimarco V, Marino M, De Angelis E, Settembrini S, Perrino C, Trimarco B, Esposito G, Vecchione C. Rac1 Modulates Endothelial Function and Platelet Aggregation in Diabetes Mellitus. J Am Heart Assoc 2018; 7:JAHA.117.007322. [PMID: 29626150 PMCID: PMC6015399 DOI: 10.1161/jaha.117.007322] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Vascular complications and abnormal platelet function contribute to morbidity and mortality in diabetes mellitus. We hypothesized that the Rho‐related GTPase protein, Rac1, can influence both endothelial and platelet function and might represent a potential novel therapeutic target in diabetes mellitus. Methods and Results We used both in vitro and ex vivo approaches to test the effects of pharmacological inhibition of Rac1 during hyperglycemic condition. We evaluated the effect of NSC23766, a pharmacological inhibitor of Rac1, on vascular function in diabetic mice and platelet aggregation in diabetic subjects. We demonstrated that the administration of NSC23766 protects from hyperglycemia‐induced endothelial dysfunction, restoring NO levels, and reduces oxidative stress generated by nicotinamide adenine dinucleotide phosphate oxidase. Mechanistically, we identified Rho‐associated coiled‐coil serine/threonine kinase‐1 as a downstream target of Rac1. Moreover, we reported that during hyperglycemic conditions, human platelets showed hyperactivation of Rac1 and impaired NO release, which were both partially restored after NSC23766 treatment. Finally, we characterized the antiplatelet effect of NSC23766 during hyperglycemic conditions, demonstrating the additional role of Rac1 inhibition in reducing platelet aggregation in diabetic patients treated with common antiplatelet drugs. Conclusions Our data suggest that the pharmacological inhibition of Rac1 could represent a novel therapeutic strategy to reduce endothelial dysfunction and platelet hyperaggregation in diabetes mellitus.
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Affiliation(s)
| | | | - Federica Ilardi
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | | | | | | | - Valentina Trimarco
- Hypertension Research Center, Federico II University Hospital, Naples, Italy
| | - Marina Marino
- Presidio Ospedaliero Umberto I, Nocera Inferiore (Salerno), Italy
| | - Elena De Angelis
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Silvio Settembrini
- Servizio Diabetologia e Malattie Metaboliche, ASL Napoli 1 Centro, Naples, Italy
| | - Cinzia Perrino
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Bruno Trimarco
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Giovanni Esposito
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Carmine Vecchione
- IRCCS Neuromed, Pozzilli (Isernia), Italy .,Department of Medicine and Surgery, University of Salerno, Baronissi (Salerno), Italy
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122
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Yaribeygi H, Mohammadi MT, Rezaee R, Sahebkar A. Crocin improves renal function by declining Nox‐4, IL‐18, and p53 expression levels in an experimental model of diabetic nephropathy. J Cell Biochem 2018; 119:6080-6093. [DOI: 10.1002/jcb.26806] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/23/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Habib Yaribeygi
- Neuroscience Research CenterBaqiyatallah University of Medical SciencesTehranIran
- Chronic Kidney Diseases Research CenterShahid Beheshti University of Medical SciencesTehranIran
| | - Mohammad T. Mohammadi
- Health Research CenterBaqiyatallah University of Medical SciencesTehranIran
- Department of Physiology and BiophysicsFaculty of MedicineBaqiyatallah University of Medical SciencesTehranIran
| | - Ramin Rezaee
- Clinical Research UnitFaculty of MedicineMashhad University of Medical SciencesMashhadIran
| | - Amirhossein Sahebkar
- Neurogenic Inflammation Research CenterMashhad University of Medical SciencesMashhadIran
- Biotechnology Research CenterPharmaceutical Technology InstituteMashhad University of Medical SciencesMashhadIran
- School of PharmacyMashhad University of Medical SciencesMashhadIran
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123
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Preservation of renal function in chronic diabetes by enhancing glomerular glucose metabolism. J Mol Med (Berl) 2018; 96:373-381. [PMID: 29574544 DOI: 10.1007/s00109-018-1630-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 02/07/2018] [Accepted: 02/12/2018] [Indexed: 12/24/2022]
Abstract
Diabetic nephropathy (DN) affects approximately 30-40% of patients with type 1 (T1DM) and type 2 diabetes (T2DM). It is a major cause of end-stage renal disease (ESRD) for the developed world. Hyperglycemia and genetics are major causal factors for the initiation and progression of DN. Multiple abnormalities in glucose and mitochondrial metabolism induced by diabetes likely contribute to the severity of DN. Recent clinical studies in people with extreme duration of T1DM (> 50 years, Joslin Medalist Study) have supported the importance of endogenous protective factors to neutralize the toxic effects of hyperglycemia on renal and other vascular tissues. Using renal glomeruli from these patients (namely Medalists) with and without DN, we have shown the importance of increased glycolytic flux in decreasing the accumulation of glucose toxic metabolites, improving mitochondrial function, survival of glomerular podocytes, and reducing glomerular pathology. Activation of a key glycolytic enzyme, pyruvate kinase M2 (PKM2), resulted in the normalization of renal hemodynamics and mitochondrial and glomerular dysfunction, leading to the mitigation of glomerular pathologies in several mouse models of DN.
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124
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Comprehensive renoprotective effects of ipragliflozin on early diabetic nephropathy in mice. Sci Rep 2018; 8:4029. [PMID: 29507299 PMCID: PMC5838225 DOI: 10.1038/s41598-018-22229-5] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 02/19/2018] [Indexed: 12/20/2022] Open
Abstract
Clinical and experimental studies have shown that sodium glucose co-transporter 2 inhibitors (SGLT2i) contribute to the prevention of diabetic kidney disease progression. In order to clarify its pharmacological effects on the molecular mechanisms underlying the development of diabetic kidney disease, we administered different doses of the SGLT2i, ipragliflozin, to type 2 diabetic mice. A high-dose ipragliflozin treatment for 8 weeks lowered blood glucose levels and reduced urinary albumin excretion. High- and low-dose ipragliflozin both inhibited renal and glomerular hypertrophy, and reduced NADPH oxidase 4 expression and subsequent oxidative stress. Analysis of glomerular phenotypes using glomeruli isolation demonstrated that ipragliflozin preserved podocyte integrity and reduced oxidative stress. Regarding renal tissue hypoxia, a short-term ipragliflozin treatment improved oxygen tension in the kidney cortex, in which SGLT2 is predominantly expressed. We then administered ipragliflozin to type 1 diabetic mice and found that high- and low-dose ipragliflozin both reduced urinary albumin excretion. In conclusion, we confirmed dose-dependent differences in the effects of ipragliflozin on early diabetic nephropathy in vivo. Even low-dose ipragliflozin reduced renal cortical hypoxia and abnormal hemodynamics in early diabetic nephropathy. In addition to these effects, high-dose ipragliflozin exerted renoprotective effects by reducing oxidative stress in tubular epithelia and glomerular podocytes.
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125
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Xu Q, Kulkarni AA, Sajith AM, Hussein D, Brown D, Güner OF, Reddy MD, Watkins EB, Lassègue B, Griendling KK, Bowen JP. Design, synthesis, and biological evaluation of inhibitors of the NADPH oxidase, Nox4. Bioorg Med Chem 2018; 26:989-998. [PMID: 29426628 PMCID: PMC5895456 DOI: 10.1016/j.bmc.2017.12.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 12/07/2017] [Accepted: 12/16/2017] [Indexed: 11/26/2022]
Abstract
NADPH oxidases (Nox enzymes) are critical mediators of both physiologic and pathophysiologic processes. Nox enzymes catalyze NADPH-dependent generation of reactive oxygen species (ROS), including superoxide and hydrogen peroxide. Until recently, Nox4 was proposed to be involved exclusively in normal physiologic functions. Compelling evidence, however, suggests that Nox4 plays a critical role in fibrosis, as well as a host of pathologies and diseases. These considerations led to a search for novel, small molecule inhibitors of this important enzyme. Ultimately, a series of novel tertiary sulfonylureas (23-25) was designed using pharmacophore modeling, synthesized, and evaluated for inhibition of Nox4-dependent signaling.
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Affiliation(s)
- Qian Xu
- Division of Cardiology, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Amol A Kulkarni
- Department of Pharmaceutical Sciences, College of Pharmacy, Howard University, Washington, DC 20059, USA.
| | - Ayyiliath M Sajith
- Department of Pharmaceutical Sciences, College of Pharmacy, Howard University, Washington, DC 20059, USA
| | - Dilbi Hussein
- Department of Pharmaceutical Sciences, College of Pharmacy, Howard University, Washington, DC 20059, USA
| | - David Brown
- Division of Cardiology, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Osman F Güner
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA; Current address: Department of Chemistry and Physics, Santa Rosa Junior College, Santa Rosa, CA 95401, USA
| | - M Damoder Reddy
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University, Jackson, TN 38305, USA
| | - E Blake Watkins
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University, Jackson, TN 38305, USA
| | - Bernard Lassègue
- Division of Cardiology, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Kathy K Griendling
- Division of Cardiology, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - J Phillip Bowen
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA.
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126
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Appukuttan B, Ma Y, Stempel A, Ashander LM, Deliyanti D, Wilkinson-Berka JL, Smith JR. Effect of NADPH oxidase 1 and 4 blockade in activated human retinal endothelial cells. Clin Exp Ophthalmol 2018; 46:652-660. [PMID: 29360265 DOI: 10.1111/ceo.13155] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Revised: 01/10/2018] [Accepted: 01/10/2018] [Indexed: 12/27/2022]
Abstract
BACKGROUND Over-production of reactive oxygen species (ROS) and resulting oxidative stress contribute to retinal damage in vascular diseases that include diabetic retinopathy, retinopathy of prematurity and major retinal vessel occlusions. NADPH oxidase (Nox) proteins are professional ROS-generating enzymes, and therapeutic targeting in these diseases has strong appeal. Pharmacological inhibition of Nox4 reduces the severity of experimental retinal vasculopathy. We investigated the potential application of this drug approach in humans. METHODS Differential Nox enzyme expression was studied by real-time-quantitative polymerase chain reaction in primary human retinal endothelial cell isolates and a characterized human retinal endothelial cell line. Oxidative stress was triggered chemically in endothelial cells, by treatment with dimethyloxalylglycine (DMOG; 100 μM); Nox4 and vascular endothelial growth factor (VEGFA) transcript were measured; and production of ROS was detected by 2',7'-dichlorofluorescein. DMOG-stimulated endothelial cells were treated with two Nox1/Nox4 inhibitors, GKT136901 and GKT137831; cell growth was monitored by DNA quantification, in addition to VEGFA transcript and ROS production. RESULTS Nox4 (isoform Nox4A) was the predominant Nox enzyme expressed by human retinal endothelial cells. Treatment with DMOG significantly increased endothelial cell expression of Nox4 over 72 h, accompanied by ROS production and increased VEGFA expression. Treatment with GKT136901 or GKT137831 significantly reduced DMOG-induced ROS production and VEGFA expression by endothelial cells, and the inhibitory effect of DMOG on cell growth. CONCLUSIONS Our findings in experiments on activated human retinal endothelial cells provide translational corroboration of studies in experimental models of retinal vasculopathy and support the therapeutic application of Nox4 inhibition by GKT136901 and GKT137831 in patients with retinal vascular diseases.
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Affiliation(s)
- Binoy Appukuttan
- Eye and Vision Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Yuefang Ma
- Eye and Vision Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Andrew Stempel
- Eye and Vision Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Liam M Ashander
- Eye and Vision Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Devy Deliyanti
- Diabetic Retinopathy, Department of Diabetes, Monash University, Melbourne, Victoria, Australia
| | | | - Justine R Smith
- Eye and Vision Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia.,South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
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127
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Sagoo MK, Gnudi L. Diabetic nephropathy: Is there a role for oxidative stress? Free Radic Biol Med 2018; 116:50-63. [PMID: 29305106 DOI: 10.1016/j.freeradbiomed.2017.12.040] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 12/27/2017] [Accepted: 12/31/2017] [Indexed: 01/06/2023]
Abstract
Oxidative stress has been implicated in the pathophysiology of diabetic nephropathy. Studies in experimental animal models of diabetes strongly implicate oxidant species as a major determinant in the pathophysiology of diabetic kidney disease. The translation, in the clinical setting, of these concepts have been quite disappointing, and new theories have challenged the concepts that oxidative stress per se plays a role in the pathophysiology of diabetic kidney disease. The concept of mitochondrial hormesis has been introduced to explain this apparent disconnect. Hormesis is intended as any cellular process that exhibits a biphasic response to exposure to increasing amounts of a substance or condition: specifically, in diabetic kidney disease, oxidant species may represent, at determined concentration, an essential and potentially protective factor. It could be postulated that excessive production or inhibition of oxidant species formation might result in an adverse phenotype. This review discusses the evidence underlying these two apparent contradicting concepts, with the aim to propose and speculate on potential mechanisms underlying the role of oxidant species in the pathophysiology of diabetic nephropathy and possibly open future more efficient therapies to be tested in the clinical settings.
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Affiliation(s)
- Manpreet K Sagoo
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK
| | - Luigi Gnudi
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, UK.
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128
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Fakhruddin S, Alanazi WA, Alhamami HN, Briski KP, Jackson KE. Hyperglycaemia induced by chronic i.p. and oral glucose loading leads to hypertension through increased Na + retention in proximal tubule. Exp Physiol 2018; 103:236-249. [PMID: 29114945 DOI: 10.1113/ep086604] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 11/03/2017] [Indexed: 12/11/2022]
Abstract
NEW FINDINGS What is the central question of the study? Chronic glucose feeding accompanied by glucose injection (i.p.) causes sustained hyperglycaemia and hypertension in rats. The exact reason for the hypertension is not known. We explore some molecular pathways of the renal proximal tubule that might promote Na+ retention. What is the main finding and its importance? Development of hypertension was mediated by upregulation of the renal renin-angiotensin system and oxidative stress, acting via the Na+ -K+ -ATPase α1 -subunit in the proximal tubule, which appears to pump intracellular Na+ into the extracellular space, increasing Na+ reabsorption and blood pressure. Targeting the Na+ -K+ -ATPase α1 -subunit might provide a therapeutic strategy for treatment of hypertension. Feeding animals glucose-, fructose-, sucrose- and fat-enriched diets can lead to diet-induced hyperglycaemia, the severity of which largely depends on the types and concentrations of the nutrients used and duration of the dietary intervention. As a dietary intervention strategy, we adopted glucose-enriched diet and drinking water, with i.p. glucose injection at a dose previously determined to be effective to establish a sustained hyperglycaemia over a period of 2 weeks. We used four groups of Sprague-Dawley rats: control; glucose treated; glucose plus tempol treated; and glucose plus captopril treated. Blood glucose concentrations started to increase gradually from day 3, peaked (321 mg dl-1 ) at day 12 and remained at similar levels until the end of the study on day 14 in the glucose treated-group compared with the control group. In contrast, the tempol- and captopril-treated groups showed significantly high glucose concentrations only in the second week. The plasma insulin concentration was significantly increased in glucose-treated animals but not in tempol- and captopril-treated groups when compared with the control rats. We also observed elevated blood pressure in the glucose-treated group compared with the control group, which can be attributed to the increase in angiotensin II concentrations from 46.67 to 99 pg ml-1 (control versus glucose), increased oxidative stress in the cortical proximal tubule (PT), decreased urine flow, and increased expression and activity of the PT-specific α1 -subunit of Na+ -K+ -ATPase in the renal cortex, which is responsible for increased sodium reabsorption from epithelial cells of PT into the peritubular capillaries, leading to increased blood volume and eventual blood pressure. All these events were reversed in captopril- and tempol-treated animals.
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Affiliation(s)
- Selim Fakhruddin
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe (ULM), Monroe, LA, USA
| | - Wael A Alanazi
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe (ULM), Monroe, LA, USA
| | - Hussain N Alhamami
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe (ULM), Monroe, LA, USA
| | - Karen P Briski
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe (ULM), Monroe, LA, USA
| | - Keith E Jackson
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe (ULM), Monroe, LA, USA
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129
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Volpe CMO, Villar-Delfino PH, Dos Anjos PMF, Nogueira-Machado JA. Cellular death, reactive oxygen species (ROS) and diabetic complications. Cell Death Dis 2018; 9:119. [PMID: 29371661 PMCID: PMC5833737 DOI: 10.1038/s41419-017-0135-z] [Citation(s) in RCA: 698] [Impact Index Per Article: 116.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 09/29/2017] [Accepted: 11/02/2017] [Indexed: 12/13/2022]
Abstract
Chronic or intermittent hyperglycemia is associated with the development of diabetic complications. Several signaling pathways can be altered by having hyperglycemia in different tissues, producing oxidative stress, the formation of advanced glycation end products (AGEs), as well as the secretion of the pro-inflammatory cytokines and cellular death (pathological autophagy and/or apoptosis). However, the signaling pathways that are directly triggered by hyperglycemia appear to have a pivotal role in diabetic complications due to the production of reactive oxygen species (ROS), oxidative stress, and cellular death. The present review will discuss the role of cellular death in diabetic complications, and it will suggest the cause and the consequences between the hyperglycemia-induced signaling pathways and cell death. The signaling pathways discussed in this review are to be described step-by-step, together with their respective inhibitors. They involve diacylglycerol, the activation of protein kinase C (PKC) and NADPH-oxidase system, and the consequent production of ROS. This was initially entitled the “dangerous metabolic route in diabetes”. The historical usages and the recent advancement of new drugs in controlling possible therapeutical targets have been highlighted, in order to evaluate the evolution of knowledge in this sensitive area. It has recently been shown that the metabolic responses to stimuli (i.e., hyperglycemia) involve an integrated network of signaling pathways, in order to define the exact responses. Certain new drugs have been experimentally tested—or suggested and proposed—for their ability to modulate the possible biochemical therapeutical targets for the downregulation of retinopathy, nephropathy, neuropathy, heart disease, angiogenesis, oxidative stress, and cellular death. The aim of this study was to critically and didactically evaluate the exact steps of these signaling pathways and hence mark the indicated sites for the actions of such drugs and their possible consequences. This review will emphasize, besides others, the therapeutical targets for controlling the signaling pathways, when aimed at the downregulation of ROS generation, oxidative stress, and, consequently, cellular death—with all of these conditions being a problem in diabetes.
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Affiliation(s)
- Caroline Maria Oliveira Volpe
- Núcleo de Pós-Graduação e Pesquisa, Hospital Santa Casa de Belo Horizonte, Rua Domingos Vieira 590, Santa Efigênia, Belo Horizonte, MG30150-240, Brazil
| | - Pedro Henrique Villar-Delfino
- Núcleo de Pós-Graduação e Pesquisa, Hospital Santa Casa de Belo Horizonte, Rua Domingos Vieira 590, Santa Efigênia, Belo Horizonte, MG30150-240, Brazil
| | - Paula Martins Ferreira Dos Anjos
- Núcleo de Pós-Graduação e Pesquisa, Hospital Santa Casa de Belo Horizonte, Rua Domingos Vieira 590, Santa Efigênia, Belo Horizonte, MG30150-240, Brazil
| | - José Augusto Nogueira-Machado
- Núcleo de Pós-Graduação e Pesquisa, Hospital Santa Casa de Belo Horizonte, Rua Domingos Vieira 590, Santa Efigênia, Belo Horizonte, MG30150-240, Brazil.
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130
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Liu SH, Wu CT, Huang KH, Wang CC, Guan SS, Chen LP, Chiang CK. C/EBP homologous protein (CHOP) deficiency ameliorates renal fibrosis in unilateral ureteral obstructive kidney disease. Oncotarget 2017; 7:21900-12. [PMID: 26942460 PMCID: PMC5008332 DOI: 10.18632/oncotarget.7870] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 02/23/2016] [Indexed: 12/21/2022] Open
Abstract
Renal tubulointerstitial fibrosis is an important pathogenic feature in chronic kidney disease and end-stage renal disease, regardless of the initiating insults. A recent study has shown that CCAAT/enhancer binding protein (C/EBP) homologous protein (CHOP) is involved in acute ischemia/reperfusion-related acute kidney injury through oxidative stress induction. However, the influence of CHOP on chronic kidney disease-correlated renal fibrosis remains unclear. Here, we investigated the role of CHOP in unilateral ureteral obstruction (UUO)-induced experimental chronic tubulointerstital fibrosis. The CHOP knockout and wild type mice with or without UUO were used. The results showed that the increased expressions of renal fibrosis markers collagen I, fibronectin, α-smooth muscle actin, and plasminogen activator inhibitor-1 in the kidneys of UUO-treated wild type mice were dramatically attenuated in the kidneys of UUO-treated CHOP knockout mice. CHOP deficiency could also ameliorate lipid peroxidation and endogenous antioxidant enzymes depletion, tubular apoptosis, and inflammatory cells infiltration in the UUO kidneys. These results suggest that CHOP deficiency not only attenuates apoptotic death and oxidative stress in experimental renal fibrosis, but also reduces local inflammation, leading to diminish UUO-induced renal fibrosis. Our findings support that CHOP may be an important signaling molecule in the progression of chronic kidney disease.
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Affiliation(s)
- Shing-Hwa Liu
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan.,Department of Pediatrics, College of Medicine, National Taiwan University & Hospital, Taipei, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Cheng-Tien Wu
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Kuo-How Huang
- Department of Urology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ching-Chia Wang
- Department of Pediatrics, College of Medicine, National Taiwan University & Hospital, Taipei, Taiwan
| | - Siao-Syun Guan
- Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan, Taiwan
| | - Li-Ping Chen
- Department of Dentistry, Taipei Chang Gang Memorial Hospital, Chang Gang University, Taipei, Taiwan
| | - Chih-Kang Chiang
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan.,Department of Integrated Diagnostics & Therapeutics, National Taiwan University Hospital, Taipei, Taiwan
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131
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Belarbi K, Cuvelier E, Destée A, Gressier B, Chartier-Harlin MC. NADPH oxidases in Parkinson's disease: a systematic review. Mol Neurodegener 2017; 12:84. [PMID: 29132391 PMCID: PMC5683583 DOI: 10.1186/s13024-017-0225-5] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 10/25/2017] [Indexed: 12/15/2022] Open
Abstract
Parkinson's disease (PD) is a progressive movement neurodegenerative disease associated with a loss of dopaminergic neurons in the substantia nigra of the brain. Oxidative stress, a condition that occurs due to imbalance in oxidant and antioxidant status, is thought to play an important role in dopaminergic neurotoxicity. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases are multi-subunit enzymatic complexes that generate reactive oxygen species as their primary function. Increased immunoreactivities for the NADPH oxidases catalytic subunits Nox1, Nox2 and Nox4 have been reported in the brain of PD patients. Furthermore, knockout or genetic inactivation of NADPH oxidases exert a neuroprotective effect and reduce detrimental aspects of pathology in experimental models of the disease. However, the connections between NADPH oxidases and the biological processes believed to contribute to neuronal death are not well known. This review provides a comprehensive summary of our current understanding about expression and physiological function of NADPH oxidases in neurons, microglia and astrocytes and their pathophysiological roles in PD. It summarizes the findings supporting the role of both microglial and neuronal NADPH oxidases in cellular disturbances associated with PD such as neuroinflammation, alpha-synuclein accumulation, mitochondrial and synaptic dysfunction or disruption of the autophagy-lysosome system. Furthermore, this review highlights different steps that are essential for NADPH oxidases enzymatic activity and pinpoints major obstacles to overcome for the development of effective NADPH oxidases inhibitors for PD.
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Affiliation(s)
- Karim Belarbi
- University Lille, Inserm, CHU Lille, UMR-S 1172 - JPArc - Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, F-59000, Lille, France
| | - Elodie Cuvelier
- University Lille, Inserm, CHU Lille, UMR-S 1172 - JPArc - Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, F-59000, Lille, France
| | - Alain Destée
- University Lille, Inserm, CHU Lille, UMR-S 1172 - JPArc - Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, F-59000, Lille, France
| | - Bernard Gressier
- University Lille, Inserm, CHU Lille, UMR-S 1172 - JPArc - Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, F-59000, Lille, France
| | - Marie-Christine Chartier-Harlin
- University Lille, Inserm, CHU Lille, UMR-S 1172 - JPArc - Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, F-59000, Lille, France. .,Inserm UMR S-1172 Team "Early stages of Parkinson's Disease", 1 Place de Verdun, 59006, Lille, France.
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132
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Gao L, Hu Y, Li J. Pigment epithelium-derived factor protects human glomerular mesangial cells from diabetes via NOXO1-iNOS suppression. Mol Med Rep 2017; 16:7855-7863. [DOI: 10.3892/mmr.2017.7563] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Accepted: 09/05/2017] [Indexed: 11/05/2022] Open
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133
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Han Q, Zhu H, Chen X, Liu Z. Non-genetic mechanisms of diabetic nephropathy. Front Med 2017; 11:319-332. [PMID: 28871454 DOI: 10.1007/s11684-017-0569-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 06/22/2017] [Indexed: 12/12/2022]
Abstract
Diabetic nephropathy (DN) is one of the most common microvascular complications in diabetes mellitus patients and is characterized by thickened glomerular basement membrane, increased extracellular matrix formation, and podocyte loss. These phenomena lead to proteinuria and altered glomerular filtration rate, that is, the rate initially increases but progressively decreases. DN has become the leading cause of end-stage renal disease. Its prevalence shows a rapid growth trend and causes heavy social and economic burden in many countries. However, this disease is multifactorial, and its mechanism is poorly understood due to the complex pathogenesis of DN. In this review, we highlight the new molecular insights about the pathogenesis of DN from the aspects of immune inflammation response, epithelial-mesenchymal transition, apoptosis and mitochondrial damage, epigenetics, and podocyte-endothelial communication. This work offers groundwork for understanding the initiation and progression of DN, as well as provides ideas for developing new prevention and treatment measures.
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Affiliation(s)
- Qiuxia Han
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing, 100853, China
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Hanyu Zhu
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing, 100853, China.
| | - Xiangmei Chen
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, Beijing, 100853, China
| | - Zhangsuo Liu
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
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134
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Haque R, Iuvone PM, He L, Hur EH, Chung Choi KS, Park D, Farrell AN, Ngo A, Gokhale S, Aseem M, Kumar B. Prorenin receptor (PRR)-mediated NADPH oxidase (Nox) signaling regulates VEGF synthesis under hyperglycemic condition in ARPE-19 cells. J Recept Signal Transduct Res 2017; 37:560-568. [PMID: 28840773 DOI: 10.1080/10799893.2017.1369120] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The stimulation of angiotensin II (Ang II), the effector peptide of renin-angiotensin system, has been reported to increase the expression of vascular endothelial growth factor (VEGF) through the activation of the Ang II type 1 receptor (AT1R). In this study, we investigated whether hyperglycemia (HG, 33 mM glucose) in ARPE-19 cells could promote the expression of VEGF independently of Ang II through prorenin receptor (PRR), via an NADPH oxidase (Nox)-dependent mechanism. ARPE-19 cells were treated with the angiotensin converting enzyme (ACE) inhibitor perindopril to block the synthesis of Ang II. Treatment with HG induced VEGF expression in ARPE-19 cells, which was attenuated by pretreatment with the inhibitors of Nox, but not those of nitric oxide synthase, xanthine oxidase and mitochondrial O2 synthesis. In addition, Nox-derived [Formula: see text] and H2O2 signaling in the regulation of VEGF was determined by using both polyethylene glycol (PEG)-catalase (CAT) and PEG-superoxide dismutase (SOD). We demonstrated that small interfering RNA (siRNA)-mediated knockdown of PRR, Nox2 and Nox4 significantly reduced the HG-induced stimulation of VEGF. On the other hand, Nox4 overexpression significantly potentiated PRR-induced stimulation of VEGF under hyperglycemia in ARPE-19 cells. Furthermore, Nox4 was shown to be associated with enhanced activities of ERK1/2 and NF-κB (p65), indicating their involvement in PRR-induced activation of VEGF under HG in ARPE-19 cells. Our results support the hypothesis that Nox4-derived reactive oxygen species (ROS) signaling is implicated in the hyperglycemia-induced increase of VEGF expression through PRR in ARPE-19 cells. However, further work is needed to evaluate the role of PRR and Nox-s in HG-induced stimulation of VEGF in vivo.
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Affiliation(s)
- Rashidul Haque
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - P Michael Iuvone
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - Li He
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - Elizabeth H Hur
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - Kimberly Su Chung Choi
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - Daniel Park
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - Annie N Farrell
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - Ashley Ngo
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - Samantha Gokhale
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - Madiha Aseem
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
| | - Bhavna Kumar
- a Department of Ophthalmology , Emory University School of Medicine , Atlanta , GA , USA
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Cai HD, Su SL, Qian DW, Guo S, Tao WW, Cong XD, Tang R, Duan JA. Renal protective effect and action mechanism of Huangkui capsule and its main five flavonoids. JOURNAL OF ETHNOPHARMACOLOGY 2017; 206:152-159. [PMID: 28408246 DOI: 10.1016/j.jep.2017.02.046] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 02/12/2017] [Accepted: 02/20/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The flower of Abelmoschus manihot (Linn.) Medicus (A. manihot), as a traditional Chinese Herbal medicine, was used widely in China with efficacy of inducing diuresis for treating strangurtia, and subdhing swelling and detoxicating. It has been reported that Huangkui capsule, prepared by the extract of the flower of A. manihot, can reduce the content of urinary protein, serum creatinine and serum urea nitrogen in nephropathy rats and processes renoprotective activity, while the action mechanism need to illuminate deeply. AIMS OF THE STUDY In this study, we investigated the protection effect of Huangkui capsule on tubulointerstitial fibrosis in chronic renal failure (CRF) rats and its mechanism against high glucose-induced epithelial to mesenchymal transition (EMT) in renal tubular epithelial cells (HK-2) of its bioactive components. MATERIALS AND METHODS The animals were divided into normal group, CRF model group and Huangkui capsule-treated group. Hematoxylin eosin (HE) staining and Masson staining were applied to observe pathological changes in renal tissue of different groups. Biochemical indicators including serum urea nitrogen (BUN), urine protein (UP) and serum creatinine (Scr) were measured according to the manufacturer's instructions of kits. HK-2 cell damaged model was established to access the protection effect and action mechanism of five main flavonoids from Huangkui capsule. The experimental cells were divided into eight groups: control group, model group, positive drug group and five main flavonoids treated groups. The dichlorodihydrofluorescein diacetate (DCFH-DA) assay was used to determine the reactive oxygen species (ROS) in different groups. Western blot was applied to analyze the expression of pathogenesis-related proteins in different groups. RESULTS The results stated that Huangkui capsule significantly inhibited the elevation of Scr, BUN, UP, the expression of α-smooth muscle actin (α-SMA), phosphorylation-extracellular signal-regulated kinase (p-ERK1/2), NADPH Oxidase 1, NADPH Oxidase 2 and NADPH Oxidase 4 in adenine-induced CRF rats. The main bioactive components of quercetin (QT), hyperoside (HY), isoquercitrin (IQT), gossypetin-8-O-β-D-glucuronide (GG) and quercetin-3'-O-glucoside (QG) at the dosage of 100µM, like NADPH oxidase inhibitor diphenyleneiodonium, exhibited a significant effect on inhibiting the expression of α-SMA, p-ERK1/2, NADPH Oxidase 1, NADPH Oxidase 2 and NADPH Oxidase 4 in high glucose-induced HK-2 cells, especially GG. CONCLUSIONS These results demonstrated that Huangkui capsule and the flavonoids components prevent tubulointerstitial fibrosis in CRF rat involvement in the action mechanism of inhibiting NADPH oxidase/ROS/ERK pathway.
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Affiliation(s)
- Hong-Die Cai
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Shu-Lan Su
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Da-Wei Qian
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Sheng Guo
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Wei-Wei Tao
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China; Center for Translational Systems Biology and Neuroscience, Laboratory of Integrative Biomedicine of Brain Diseases, School of Basic Biomedical Science, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Xu Dong Cong
- SZYY Group Pharmaceutical Limited, Jiangyan 225500, China
| | - Renmao Tang
- SZYY Group Pharmaceutical Limited, Jiangyan 225500, China.
| | - Jin-Ao Duan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
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136
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Aseer KR, Silvester AJ, Kumar A, Choi MS, Yun JW. SPARC paucity alleviates superoxide-mediated oxidative stress, apoptosis, and autophagy in diabetogenic hepatocytes. Free Radic Biol Med 2017; 108:874-895. [PMID: 28499910 DOI: 10.1016/j.freeradbiomed.2017.05.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 05/05/2017] [Accepted: 05/08/2017] [Indexed: 12/14/2022]
Abstract
Secreted protein acidic and rich in cysteine (SPARC) is known to play a previously unappreciated role in diabetes, but its precise mechanism in liver/hepatocyte pathology remains unknown. Inhibition of SPARC is critical in resolving candidate pathogenic events such as production of reactive oxygen species (ROS), which are broadly considered for their roles in diabetes, and is capable of protecting functional hepatocytes. Here, we provide in vitro and in vivo evidence demonstrating pathological correlations between SPARC and streptozotocin (STZ)-induced diabetic rat livers as well as cultured hepatocytes induced by diabetogenic stimuli. Under these conditions, transient SPARC silencing was carried out to investigate the role of SPARC in the pathogenesis of pro-diabetic hepatocyte damage and dysfunction. The constitutive expression of SPARC in hepatocytes was up-regulated under a diabetic environment. In addition, Nox4-dependent superoxide generation contributed to increased expression of SPARC, and this was inhibited by tiron and pharmacological or genetic inactivation of Nox4-containing NADPH oxidase. Remarkably, SPARC deficiency inhibited diabetic stimuli-induced elevation of superoxide production and resolved salient features of hepatocyte damage such as impaired cytoprotection, inflammation, apoptosis, and autophagy. At the same time, links between SPARC, integrin-β1, Nox4-derived superoxide, and JNK signaling provide a basis for these phenotypes. Taken together with the observations that SPARC deficiency had protective effects on hepatocytes via a favorable inhibition profile, functional knowledge of SPARC may offer a unique therapeutic approach to preserve hepatocellular fate decisions in diabetes.
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Affiliation(s)
- Kanikkai Raja Aseer
- Department of Biotechnology, Daegu University, Kyungsan, Kyungbuk 712-714, Republic of Korea
| | | | - Anuj Kumar
- Bioinformatics and Documentation Laboratory, Uttarakhand Council for Biotechnology, Dehradun 248007, India
| | - Myung-Sook Choi
- Department of Food Science and Nutrition & Center for Food and Nutritional Genomics Research, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Jong Won Yun
- Department of Biotechnology, Daegu University, Kyungsan, Kyungbuk 712-714, Republic of Korea.
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137
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Kwon G, Uddin MJ, Lee G, Jiang S, Cho A, Lee JH, Lee SR, Bae YS, Moon SH, Lee SJ, Cha DR, Ha H. A novel pan-Nox inhibitor, APX-115, protects kidney injury in streptozotocin-induced diabetic mice: possible role of peroxisomal and mitochondrial biogenesis. Oncotarget 2017; 8:74217-74232. [PMID: 29088780 PMCID: PMC5650335 DOI: 10.18632/oncotarget.18540] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 06/05/2017] [Indexed: 02/07/2023] Open
Abstract
NADPH oxidase (Nox)-derived reactive oxygen species (ROS) are increasingly recognized as a key factor in inflammation and extracellular matrix accumulation in diabetic kidney disease. APX-115 (3-phenyl-1-(pyridin-2-yl)-4-propyl-1-5-hydroxypyrazol HCl) is a novel orally active pan-Nox inhibitor. The objective of this study was to compare the protective effect of APX-115 with a renin-angiotensin system inhibitor (losartan), the standard treatment against kidney injury in diabetic patients, on streptozotocin (STZ)-induced diabetic kidney injury. Diabetes was induced by intraperitoneal injection of STZ at 50 mg/kg/day for 5 days in C57BL/6J mice. APX-115 (60 mg/kg/day) or losartan (1.5 mg/kg/day) was administered orally to diabetic mice for 12 weeks. APX-115 effectively prevented kidney injury such as albuminuria, glomerular hypertrophy, tubular injury, podocyte injury, fibrosis, and inflammation as well as oxidative stress in diabetic mice, similar to losartan. In addition, both APX-115 and losartan treatment effectively inhibited mitochondrial and peroxisomal dysfunction associated with lipid accumulation. Our data suggest that APX-115, a pan-Nox inhibitor, may become a novel therapeutic agent against diabetic kidney disease by maintaining peroxisomal and mitochondrial fitness.
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Affiliation(s)
- Guideock Kwon
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul, Korea
| | - Md Jamal Uddin
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul, Korea
| | - Gayoung Lee
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul, Korea
| | - Songling Jiang
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul, Korea
| | - Ahreum Cho
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul, Korea
| | - Jung Hwa Lee
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul, Korea
| | - Sae Rom Lee
- Department of Life Science, Ewha Womans University, Seoul, Korea
| | - Yun Soo Bae
- Department of Life Science, Ewha Womans University, Seoul, Korea
| | | | | | - Dae Ryong Cha
- Department of Internal Medicine, Division of Nephrology, Korea University, Seoul, Korea
| | - Hunjoo Ha
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul, Korea
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138
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Incalza MA, D'Oria R, Natalicchio A, Perrini S, Laviola L, Giorgino F. Oxidative stress and reactive oxygen species in endothelial dysfunction associated with cardiovascular and metabolic diseases. Vascul Pharmacol 2017; 100:1-19. [PMID: 28579545 DOI: 10.1016/j.vph.2017.05.005] [Citation(s) in RCA: 748] [Impact Index Per Article: 106.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 05/21/2017] [Accepted: 05/31/2017] [Indexed: 12/13/2022]
Abstract
Reactive oxygen species (ROS) are reactive intermediates of molecular oxygen that act as important second messengers within the cells; however, an imbalance between generation of reactive ROS and antioxidant defense systems represents the primary cause of endothelial dysfunction, leading to vascular damage in both metabolic and atherosclerotic diseases. Endothelial activation is the first alteration observed, and is characterized by an abnormal pro-inflammatory and pro-thrombotic phenotype of the endothelial cells lining the lumen of blood vessels. This ultimately leads to reduced nitric oxide (NO) bioavailability, impairment of the vascular tone and other endothelial phenotypic changes collectively termed endothelial dysfunction(s). This review will focus on the main mechanisms involved in the onset of endothelial dysfunction, with particular focus on inflammation and aberrant ROS production and on their relationship with classical and non-classical cardiovascular risk factors, such as hypertension, metabolic disorders, and aging. Furthermore, new mediators of vascular damage, such as microRNAs, will be discussed. Understanding mechanisms underlying the development of endothelial dysfunction is an important base of knowledge to prevent vascular damage in metabolic and cardiovascular diseases.
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Affiliation(s)
- Maria Angela Incalza
- Department of Emergency and Organ Transplantation, Section on Internal Medicine, Endocrinology, Andrology and Metabolic Diseases, University of Bari Aldo Moro, Bari, Italy
| | - Rossella D'Oria
- Department of Emergency and Organ Transplantation, Section on Internal Medicine, Endocrinology, Andrology and Metabolic Diseases, University of Bari Aldo Moro, Bari, Italy
| | - Annalisa Natalicchio
- Department of Emergency and Organ Transplantation, Section on Internal Medicine, Endocrinology, Andrology and Metabolic Diseases, University of Bari Aldo Moro, Bari, Italy
| | - Sebastio Perrini
- Department of Emergency and Organ Transplantation, Section on Internal Medicine, Endocrinology, Andrology and Metabolic Diseases, University of Bari Aldo Moro, Bari, Italy
| | - Luigi Laviola
- Department of Emergency and Organ Transplantation, Section on Internal Medicine, Endocrinology, Andrology and Metabolic Diseases, University of Bari Aldo Moro, Bari, Italy
| | - Francesco Giorgino
- Department of Emergency and Organ Transplantation, Section on Internal Medicine, Endocrinology, Andrology and Metabolic Diseases, University of Bari Aldo Moro, Bari, Italy.
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139
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Teixeira G, Szyndralewiez C, Molango S, Carnesecchi S, Heitz F, Wiesel P, Wood JM. Therapeutic potential of NADPH oxidase 1/4 inhibitors. Br J Pharmacol 2017; 174:1647-1669. [PMID: 27273790 PMCID: PMC5446584 DOI: 10.1111/bph.13532] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 05/23/2016] [Accepted: 05/23/2016] [Indexed: 12/16/2022] Open
Abstract
The NADPH oxidase (NOX) family of enzymes produces ROS as their sole function and is becoming recognized as key modulators of signal transduction pathways with a physiological role under acute stress and a pathological role after excessive activation under chronic stress. The seven isoforms differ in their regulation, tissue and subcellular localization and ROS products. The most studied are NOX1, 2 and 4. Genetic deletion of NOX1 and 4, in contrast to NOX2, has revealed no significant spontaneous pathologies and a pathogenic relevance of both NOX1 and 4 across multiple organs in a wide range of diseases and in particular inflammatory and fibrotic diseases. This has stimulated interest in NOX inhibitors for therapeutic application. GKT136901 and GKT137831 are two structurally related compounds demonstrating a preferential inhibition of NOX1 and 4 that have suitable properties for in vivo studies and have consequently been evaluated across a range of disease models and compared with gene deletion. In contrast to gene deletion, these inhibitors do not completely suppress ROS production, maintaining some basal level of ROS. Despite this and consistent with most gene deletion studies, these inhibitors are well tolerated and slow or prevent disease progression in a range of models of chronic inflammatory and fibrotic diseases by modulating common signal transduction pathways. Clinical trials in patients with GKT137831 have demonstrated excellent tolerability and reduction of various markers of chronic inflammation. NOX1/4 inhibition may provide a safe and effective therapeutic strategy for a range of inflammatory and fibrotic diseases. LINKED ARTICLES This article is part of a themed section on Redox Biology and Oxidative Stress in Health and Disease. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.12/issuetoc.
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Affiliation(s)
- G Teixeira
- Evotec International GmbHGoettingenGermany
| | | | - S Molango
- Genkyotex SAPlan les OuatesSwitzerland
| | | | - F Heitz
- Genkyotex SAPlan les OuatesSwitzerland
| | - P Wiesel
- Genkyotex SAPlan les OuatesSwitzerland
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140
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Morry J, Ngamcherdtrakul W, Yantasee W. Oxidative stress in cancer and fibrosis: Opportunity for therapeutic intervention with antioxidant compounds, enzymes, and nanoparticles. Redox Biol 2017; 11:240-253. [PMID: 28012439 PMCID: PMC5198743 DOI: 10.1016/j.redox.2016.12.011] [Citation(s) in RCA: 230] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 12/05/2016] [Accepted: 12/06/2016] [Indexed: 12/21/2022] Open
Abstract
Oxidative stress, mainly contributed by reactive oxygen species (ROS), has been implicated in pathogenesis of several diseases. We review two primary examples; fibrosis and cancer. In fibrosis, ROS promote activation and proliferation of fibroblasts and myofibroblasts, activating TGF-β pathway in an autocrine manner. In cancer, ROS account for its genomic instability, resistance to apoptosis, proliferation, and angiogenesis. Importantly, ROS trigger cancer cell invasion through invadopodia formation as well as extravasation into a distant metastasis site. Use of antioxidant supplements, enzymes, and inhibitors for ROS-generating NADPH oxidases (NOX) is a logical therapeutic intervention for fibrosis and cancer. We review such attempts, progress, and challenges. Lastly, we review how nanoparticles with inherent antioxidant activity can also be a promising therapeutic option, considering their additional feature as a delivery platform for drugs, genes, and imaging agents.
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Affiliation(s)
- Jingga Morry
- Department of Biomedical Engineering, Oregon Health and Science University, 3303 SW Bond Ave, Portland, OR 97239, USA
| | - Worapol Ngamcherdtrakul
- Department of Biomedical Engineering, Oregon Health and Science University, 3303 SW Bond Ave, Portland, OR 97239, USA; PDX Pharmaceuticals, LLC, 3303 SW Bond Ave, Portland, OR 97239, USA
| | - Wassana Yantasee
- Department of Biomedical Engineering, Oregon Health and Science University, 3303 SW Bond Ave, Portland, OR 97239, USA; PDX Pharmaceuticals, LLC, 3303 SW Bond Ave, Portland, OR 97239, USA.
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141
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Cha JJ, Min HS, Kim KT, Kim JE, Ghee JY, Kim HW, Lee JE, Han JY, Lee G, Ha HJ, Bae YS, Lee SR, Moon SH, Lee SC, Kim G, Kang YS, Cha DR. APX-115, a first-in-class pan-NADPH oxidase (Nox) inhibitor, protects db/db mice from renal injury. J Transl Med 2017; 97:419-431. [PMID: 28165467 DOI: 10.1038/labinvest.2017.2] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 12/15/2016] [Accepted: 12/27/2016] [Indexed: 02/07/2023] Open
Abstract
Recent studies have suggested that renal Nox is important in the progression of diabetic nephropathy. Therefore, we investigated the effect of a novel pan-NOX-inhibitor, APX-115, on diabetic nephropathy in type 2 diabetic mice. Eight- week-old db/m and db/db mice were treated with APX-115 for 12 weeks. APX-115 was administered by oral gavage at a dose of 60 mg/kg per day. To compare the effects of APX-115 with a dual Nox1/Nox4 inhibitor, db/db mice were treated with GKT137831 according to the same protocol. APX-115 significantly improved insulin resistance in diabetic mice, similar to GKT137831. Oxidative stress as measured by plasma 8-isoprostane level was decreased in the APX-115 group compared with diabetic controls. All lipid profiles, both in plasma and tissues improved with Nox inhibition. APX-115 treatment decreased Nox1, Nox2, and Nox4 protein expression in the kidney. APX-115 decreased urinary albumin excretion and preserved creatinine level. In diabetic kidneys, APX-115 significantly improved mesangial expansion, but GKT137831 did not. In addition, F4/80 infiltration in the adipose tissue and kidney decreased with APX-115 treatment. We also found that TGF-β stimulated ROS generation in primary mouse mesangial cells (pMMCs) from wild-type, Nox1 KO, and Duox1 KO mice, but did not induce Nox activity in pMMCs from Nox2 knockout (KO), Nox4 KO, or Duox2 KO mice. These results indicate that activating Nox2, Nox4, or Duox2 in pMMCs is essential for TGF-β-mediated ROS generation. Our findings suggest that APX-115 may be as effective or may provide better protection than the dual Nox1/Nox4 inhibitor, and pan-Nox inhibition with APX-115 might be a promising therapy for diabetic nephropathy.
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Affiliation(s)
- Jin Joo Cha
- Department of Internal Medicine, Division of Nephrology, Korea University Ansan Hospital, Ansan, Korea
| | - Hye Sook Min
- Department of Internal Medicine, Division of Nephrology, Korea University Ansan Hospital, Ansan, Korea
| | - Ki Tae Kim
- Department of Internal Medicine, Division of Nephrology, Korea University Ansan Hospital, Ansan, Korea
| | - Jung Eun Kim
- Department of Internal Medicine, Division of Nephrology, Korea University Ansan Hospital, Ansan, Korea
| | - Jung Yeon Ghee
- Department of Internal Medicine, Division of Nephrology, Korea University Ansan Hospital, Ansan, Korea
| | - Hyun Wook Kim
- Department of Internal Medicine, Division of Nephrology, Wonkwang University, Gunpo, Korea
| | - Ji Eun Lee
- Department of Internal Medicine, Division of Nephrology, Wonkwang University, Gunpo, Korea
| | - Jee Young Han
- Department of Pathology, Inha University, Incheon, Korea
| | - Gayoung Lee
- Department of Pharmaceutical Science, College of Pharmacy, Ewha Woman's University, Seoul, Korea
| | - Hun Joo Ha
- Department of Pharmaceutical Science, College of Pharmacy, Ewha Woman's University, Seoul, Korea
| | - Yun Soo Bae
- Department of Life Science, College of Natural Sciences, Ewha Woman's University, Seoul, Korea
| | - Sae Rom Lee
- Department of Life Science, College of Natural Sciences, Ewha Woman's University, Seoul, Korea
| | | | | | - Ganghyun Kim
- Department of Internal Medicine, Division of Nephrology, Korea University Ansan Hospital, Ansan, Korea
| | - Young Sun Kang
- Department of Internal Medicine, Division of Nephrology, Korea University Ansan Hospital, Ansan, Korea
| | - Dae Ryong Cha
- Department of Internal Medicine, Division of Nephrology, Korea University Ansan Hospital, Ansan, Korea
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142
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Goru SK, Kadakol A, Gaikwad AB. Hidden targets of ubiquitin proteasome system: To prevent diabetic nephropathy. Pharmacol Res 2017; 120:170-179. [PMID: 28363724 DOI: 10.1016/j.phrs.2017.03.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Accepted: 03/21/2017] [Indexed: 12/21/2022]
Abstract
Diabetic nephropathy (DN) is the major cause of end stage renal failure. Although, several therapeutic targets have emerged to prevent the progression of DN, the number of people with DN still continues to rise worldwide, suggesting an urgent need of novel targets to prevent DN completely. Currently, the role of ubiquitin proteasome system (UPS) has been highlighted in the pathogenesis and progression of various diseases like obesity, insulin resistance, atherosclerosis, cancers, neurodegerative disorders and including secondary complications of diabetes. UPS mainly involves in protein homeostatis through ubiquitination (post translational modification) and proteasomal degradation of various proteins. Ubiquitination, not only involves in proteasomal degradation, but also directs the substrate proteins to participate in multitude of cell signalling pathways. However, very little is known about ubiquitination and UPS in the progression of DN. This review mainly focuses on UPS and its components including E2 conjugating enzymes, E3 ligases and deubiquitinases (DUBs) in the development of DN and thus may help us to find novel therapeutic targets with in UPS to prevent DN completely in future.
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Affiliation(s)
- Santosh Kumar Goru
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Almesh Kadakol
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Anil Bhanudas Gaikwad
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India.
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143
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Gonzalez-Vicente A, Garvin JL. Effects of Reactive Oxygen Species on Tubular Transport along the Nephron. Antioxidants (Basel) 2017; 6:antiox6020023. [PMID: 28333068 PMCID: PMC5488003 DOI: 10.3390/antiox6020023] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/15/2017] [Accepted: 03/18/2017] [Indexed: 12/17/2022] Open
Abstract
Reactive oxygen species (ROS) are oxygen-containing molecules naturally occurring in both inorganic and biological chemical systems. Due to their high reactivity and potentially damaging effects to biomolecules, cells express a battery of enzymes to rapidly metabolize them to innocuous intermediaries. Initially, ROS were considered by biologists as dangerous byproducts of respiration capable of causing oxidative stress, a condition in which overproduction of ROS leads to a reduction in protective molecules and enzymes and consequent damage to lipids, proteins, and DNA. In fact, ROS are used by immune systems to kill virus and bacteria, causing inflammation and local tissue damage. Today, we know that the functions of ROS are not so limited, and that they also act as signaling molecules mediating processes as diverse as gene expression, mechanosensation, and epithelial transport. In the kidney, ROS such as nitric oxide (NO), superoxide (O₂-), and their derivative molecules hydrogen peroxide (H₂O₂) and peroxynitrite (ONO₂-) regulate solute and water reabsorption, which is vital to maintain electrolyte homeostasis and extracellular fluid volume. This article reviews the effects of NO, O₂-, ONO₂-, and H₂O₂ on water and electrolyte reabsorption in proximal tubules, thick ascending limbs, and collecting ducts, and the effects of NO and O₂- in the macula densa on tubuloglomerular feedback.
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Affiliation(s)
- Agustin Gonzalez-Vicente
- Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
- Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires C1113AAD, Argentina.
| | - Jeffrey L Garvin
- Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
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144
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Lee JY, Kim MY, Shin SH, Shin MR, Kwon OJ, Kim TH, Park CH, Noh JS, Rhee MH, Roh SS. Persicarin isolated from Oenanthe javanica protects against diabetes-induced oxidative stress and inflammation in the liver of streptozotocin-induced type 1 diabetic mice. Exp Ther Med 2017; 13:1194-1202. [PMID: 28413457 PMCID: PMC5377288 DOI: 10.3892/etm.2017.4113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 09/09/2016] [Indexed: 01/01/2023] Open
Abstract
Persicarin is one of the major components of the Oenanthe javanica (water dropwort). The present study was aimed to evaluate the role of persicarin in the hepatic tissue of streptozotocin-induced type 1 diabetic mice. Diabetes was induced by single intra-peritoneal injection of streptozotocin (120 mg/kg body weight) and then oral administration of persicarin at a dose 2.5 and 5 mg/kg body weight for 10 days. Serum and hepatic glucose levels were increased in diabetic control mice, while persicarin treatment groups were markedly reduced. Also, the increased levels of ALT and AST in serum were improved by persicarin. In our results revealed that persicarin suppressed increased oxidative stress parameter (reactive oxygen species, peroxinitrite, and thiobarbituric acid-reactive substance), nicotinamide adenine dinucleotide phosphate oxidase subunit (Nox-4 and P47phox) and inflammatory related makers (NF-κB, AP-1, TGF-β, COX-2, and iNOS). These results suggest that persicarin protects against liver damage by attenuating oxidative stress and inflammatory response under hyperglycemic conditions. Thus, persicarin could perform as a potential therapeutic agent for the treatment of diabetic mellitus.
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Affiliation(s)
- Joo Young Lee
- Department of Herbology, College of Korean Medicine, Daegu Haany University, Daegu 706-060, Republic of Korea
| | - Min Yeong Kim
- Department of Herbology, College of Korean Medicine, Daegu Haany University, Daegu 706-060, Republic of Korea
| | - Sung Ho Shin
- Department of Herbology, College of Korean Medicine, Daegu Haany University, Daegu 706-060, Republic of Korea
| | - Mi-Rae Shin
- Department of Herbology, College of Korean Medicine, Daegu Haany University, Daegu 706-060, Republic of Korea
| | - O Jun Kwon
- Kyeoungbuk Institute for Regional Program Evaluation, Gyeongsan, Gyeongsangbuk 38542, Republic of Korea
| | - Tae Hoon Kim
- Department of Food Science & Biotechnology, Daegu University, Gyeongsan, Gyeongsangbuk 38453, Republic of Korea
| | - Chan Hum Park
- Department of Medicinal Crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumseong, Gyeongsangbuk 27710, Republic of Korea
| | - Jeong Sook Noh
- Department of Food Science & Nutrition, Tongmyong University, Busan, Gyeongsangnam 48520, Republic of Korea
| | - Man Hee Rhee
- Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Seong-Soo Roh
- Department of Herbology, College of Korean Medicine, Daegu Haany University, Daegu 706-060, Republic of Korea
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145
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Manna P, Achari AE, Jain SK. Vitamin D supplementation inhibits oxidative stress and upregulate SIRT1/AMPK/GLUT4 cascade in high glucose-treated 3T3L1 adipocytes and in adipose tissue of high fat diet-fed diabetic mice. Arch Biochem Biophys 2017; 615:22-34. [DOI: 10.1016/j.abb.2017.01.002] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 12/14/2016] [Accepted: 01/03/2017] [Indexed: 01/08/2023]
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146
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Ma MW, Wang J, Zhang Q, Wang R, Dhandapani KM, Vadlamudi RK, Brann DW. NADPH oxidase in brain injury and neurodegenerative disorders. Mol Neurodegener 2017; 12:7. [PMID: 28095923 PMCID: PMC5240251 DOI: 10.1186/s13024-017-0150-7] [Citation(s) in RCA: 292] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 01/05/2017] [Indexed: 12/11/2022] Open
Abstract
Oxidative stress is a common denominator in the pathology of neurodegenerative disorders such as Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, amyotrophic lateral sclerosis, and multiple sclerosis, as well as in ischemic and traumatic brain injury. The brain is highly vulnerable to oxidative damage due to its high metabolic demand. However, therapies attempting to scavenge free radicals have shown little success. By shifting the focus to inhibit the generation of damaging free radicals, recent studies have identified NADPH oxidase as a major contributor to disease pathology. NADPH oxidase has the primary function to generate free radicals. In particular, there is growing evidence that the isoforms NOX1, NOX2, and NOX4 can be upregulated by a variety of neurodegenerative factors. The majority of recent studies have shown that genetic and pharmacological inhibition of NADPH oxidase enzymes are neuroprotective and able to reduce detrimental aspects of pathology following ischemic and traumatic brain injury, as well as in chronic neurodegenerative disorders. This review aims to summarize evidence supporting the role of NADPH oxidase in the pathology of these neurological disorders, explores pharmacological strategies of targeting this major oxidative stress pathway, and outlines obstacles that need to be overcome for successful translation of these therapies to the clinic.
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Affiliation(s)
- Merry W Ma
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Jing Wang
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Quanguang Zhang
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Ruimin Wang
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Krishnan M Dhandapani
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA.,Department of Neurosurgery, Medical College of Georgia, Augusta University, 1120 Fifteenth Street, Augusta, GA, 30912, USA
| | - Ratna K Vadlamudi
- Department of Obstetrics and Gynecology, University of Texas Health Science Center, 7703 Medical Drive, San Antonio, TX, 78229, USA
| | - Darrell W Brann
- Charlie Norwood VA Medical Center, One Freedom Way, Augusta, GA, 30904, USA. .,Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, 1120 Fifteenth Street, Augusta, GA, 30912, USA.
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147
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Manganese supplementation increases adiponectin and lowers ICAM-1 and creatinine blood levels in Zucker type 2 diabetic rats, and downregulates ICAM-1 by upregulating adiponectin multimerization protein (DsbA-L) in endothelial cells. Mol Cell Biochem 2017; 429:1-10. [PMID: 28083716 DOI: 10.1007/s11010-016-2931-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 12/23/2016] [Indexed: 12/15/2022]
Abstract
Blood and tissue levels of manganese (Mn) are lower in type 2 diabetic and atherosclerosis patients compared with healthy subjects. Adiponectin has anti-diabetic and anti-atherogenic properties. Impairment in Disulfide bond A-like protein (DsbA-L) is associated with low adiponectin levels and diabetes. This study investigates the hypothesis that the beneficial effects of Mn supplementation are mediated by adiponectin and DsbA-L. At 6 weeks of age, Male Zucker diabetic fatty rats (ZDF) were randomly divided into two groups: diabetic controls and Mn-supplemented diabetic rats. Each rat was supplemented with Mn (D+Mn, 16 mg/kg BW) or water (placebo, D+P) daily for 7 weeks by oral gavage. For cell culture studies, Human Umbilical Vein Endothelial Cells (HUVEC) or 3T3L1 adipocytes were pretreated with Mn (0-10 µM MnCl2) for 24 h, followed by high glucose (HG, 25 mM) or normal glucose (5 mM) exposure for another 24 h. Mn supplementation resulted in higher adiponectin (p = 0.01), and lower ICAM-1 (p = 0.04) and lower creatinine (p = 0.04) blood levels compared to those in control ZDF rats. Mn-supplemented rats also caused reduced oxidative stress (ROS) and NADPH oxidase, and higher DsbA-L expression in the liver (p = 0.03) of ZDF rats compared to those in livers of control rats; however, Fe levels in liver were lower but not significant (p = 0.08). Similarly, treatment with high glucose (25 mM) caused a decrease in DsbA-L, which was prevented by Mn supplementation in HUVEC and adipocytes. Mechanistic studies with DsbA-L siRNA showed that the beneficial effects of Mn supplementation on ROS, NOX4, and ICAM-1 expression were abolished in DsbA-L knock-down HUVEC. These studies demonstrate that DsbA-L-linked adiponectin mediates the beneficial effects observed with Mn supplementation and provides evidence for a novel mechanism by which Mn supplementation can increase adiponectin and reduce the biomarkers of endothelial dysfunction in diabetes.
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148
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Yiu WH, Wong DWL, Wu HJ, Li RX, Yam I, Chan LYY, Leung JCK, Lan HY, Lai KN, Tang SCW. Kallistatin protects against diabetic nephropathy in db/db mice by suppressing AGE-RAGE-induced oxidative stress. Kidney Int 2017; 89:386-98. [PMID: 26536000 DOI: 10.1038/ki.2015.331] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 09/05/2015] [Accepted: 09/10/2015] [Indexed: 01/03/2023]
Abstract
Kallistatin is a serine protease inhibitor with anti-inflammatory, anti-angiogenic, and anti-oxidative properties. Since oxidative stress plays a critical role in the pathogenesis of diabetic nephropathy, we studied the effect and mechanisms of action of kallistatin superinduction. Using ultrasound-microbubble-mediated gene transfer, kallistatin overexpression was induced in kidney tubules. In db/db mice, kallistatin overexpression reduced serum creatinine and BUN levels, ameliorated glomerulosclerosis and tubulointerstitial injury, and attenuated renal fibrosis by inhibiting TGF-β signaling. Additionally, downstream PAI-1 and collagens I and IV expression were reduced and kallistatin partially suppressed renal inflammation by inhibiting NF-κB signaling and decreasing tissue kallikrein activity. Kallistatin lowered blood pressure and attenuated oxidative stress as evidenced by suppressed levels of NADPH oxidase 4, and oxidative markers (nitrotyrosine, 8-hydroxydeoxyguanosine, and malondialdehyde) in diabetic renal tissue. Kallistatin also inhibited RAGE expression in the diabetic kidney and AGE-stimulated cultured proximal tubular cells. Reduced AGE-induced reactive oxygen species generation reflected an anti-oxidative mechanism via the AGE-RAGE-reactive oxygen species axis. These results indicate a renoprotective role of kallistatin against diabetic nephropathy by multiple mechanisms including suppression of oxidative stress, anti-fibrotic and anti-inflammatory actions, and blood pressure lowering.
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149
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Oh HJ, Kato M, Deshpande S, Zhang E, Das S, Lanting L, Wang M, Natarajan R. Inhibition of the processing of miR-25 by HIPK2-Phosphorylated-MeCP2 induces NOX4 in early diabetic nephropathy. Sci Rep 2016; 6:38789. [PMID: 27941951 PMCID: PMC5150532 DOI: 10.1038/srep38789] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 11/11/2016] [Indexed: 12/19/2022] Open
Abstract
Phosphorylated methyl-CpG binding protein2 (p-MeCP2) suppresses the processing of several microRNAs (miRNAs). Homeo-domain interacting protein kinase2 (HIPK2) phosphorylates MeCP2, a known transcriptional repressor. However, it is not known if MeCP2 and HIPK2 are involved in processing of miRNAs implicated in diabetic nephropathy. p-MeCP2 and HIPK2 levels were significantly increased, but Seven in Absentia Homolog1 (SIAH1), which mediates proteasomal degradation of HIPK2, was decreased in the glomeruli of streptozotocin injected diabetic mice. Among several miRNAs, miR-25 and its precursor were significantly decreased in diabetic mice, whereas primary miR-25 levels were significantly increased. NADPH oxidase4 (NOX4), a target of miR-25, was significantly increased in diabetic mice. Protein levels of p-MeCP2, HIPK2, and NOX4 were increased in high glucose (HG)- or TGF-β-treated mouse glomerular mesangial cells (MMCs). miR-25 (primary, precursor, and mature) and mRNA levels of genes indicated in the in vivo study showed similar trends of regulation in MMCs treated with HG or TGF-β. The HG- or TGF-β-induced upregulation of p-MeCP2, NOX4 and primary miR-25, but downregulation of precursor and mature miR-25, were attenuated by Hipk2 siRNA. These results demonstrate a novel role for the SIAH1/HIPK2/MeCP2 axis in suppressing miR-25 processing and thereby upregulating NOX4 in early diabetic nephropathy.
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Affiliation(s)
- Hyung Jung Oh
- Department of Diabetes Complications and Metabolism, Beckman Research Institute of City of Hope, Duarte, California, USA.,Ewha Institute of Convergence Medicine, Ewha Womans University Mokdong Hospital, South Korea
| | - Mitsuo Kato
- Department of Diabetes Complications and Metabolism, Beckman Research Institute of City of Hope, Duarte, California, USA
| | - Supriya Deshpande
- Department of Diabetes Complications and Metabolism, Beckman Research Institute of City of Hope, Duarte, California, USA
| | - Erli Zhang
- Department of Diabetes Complications and Metabolism, Beckman Research Institute of City of Hope, Duarte, California, USA.,Tsingua University, Beijing, China
| | - Sadhan Das
- Department of Diabetes Complications and Metabolism, Beckman Research Institute of City of Hope, Duarte, California, USA
| | - Linda Lanting
- Department of Diabetes Complications and Metabolism, Beckman Research Institute of City of Hope, Duarte, California, USA
| | - Mei Wang
- Department of Diabetes Complications and Metabolism, Beckman Research Institute of City of Hope, Duarte, California, USA
| | - Rama Natarajan
- Department of Diabetes Complications and Metabolism, Beckman Research Institute of City of Hope, Duarte, California, USA
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150
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Li MS, Adesina SE, Ellis CL, Gooch JL, Hoover RS, Williams CR. NADPH oxidase-2 mediates zinc deficiency-induced oxidative stress and kidney damage. Am J Physiol Cell Physiol 2016; 312:C47-C55. [PMID: 27806940 DOI: 10.1152/ajpcell.00208.2016] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 10/24/2016] [Indexed: 01/08/2023]
Abstract
Zn2+ deficiency (ZnD) is comorbid with chronic kidney disease and worsens kidney complications. Oxidative stress is implicated in the detrimental effects of ZnD. However, the sources of oxidative stress continue to be identified. Since NADPH oxidases (Nox) are the primary enzymes that contribute to renal reactive oxygen species generation, this study's objective was to determine the role of these enzymes in ZnD-induced oxidative stress. We hypothesized that ZnD promotes NADPH oxidase upregulation, resulting in oxidative stress and kidney damage. To test this hypothesis, wild-type mice were pair-fed a ZnD or Zn2+-adequate diet. To further investigate the effects of Zn2+ bioavailability on NADPH oxidase regulation, mouse tubular epithelial cells were exposed to the Zn2+ chelator N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) or vehicle followed by Zn2+ supplementation. We found that ZnD diet-fed mice develop microalbuminuria, electrolyte imbalance, and whole kidney hypertrophy. These markers of kidney damage are accompanied by elevated Nox2 expression and H2O2 levels. In mouse tubular epithelial cells, TPEN-induced ZnD stimulates H2O2 generation. In this in vitro model of ZnD, enhanced H2O2 generation is prevented by NADPH oxidase inhibition with diphenyleneiodonium. Specifically, TPEN promotes Nox2 expression and activation, which are reversed when intracellular Zn2+ levels are restored following Zn2+ supplementation. Finally, Nox2 knockdown by siRNA prevents TPEN-induced H2O2 generation and cellular hypertrophy in vitro. Together, these findings reveal that Nox2 is a Zn2+-regulated enzyme that mediates ZnD-induced oxidative stress and kidney hypertrophy. Understanding the specific mechanisms by which ZnD contributes to kidney damage may have an important impact on the treatment of chronic kidney disease.
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Affiliation(s)
- Mirandy S Li
- School of Medicine, Emory University, Atlanta, Georgia
| | - Sherry E Adesina
- School of Medicine, Emory University, Atlanta, Georgia.,Atlanta Veterans Affairs Medical Center, Atlanta, Georgia
| | - Carla L Ellis
- School of Medicine, Emory University, Atlanta, Georgia
| | - Jennifer L Gooch
- School of Medicine, Emory University, Atlanta, Georgia.,Pharmaceutical Sciences, Philadelphia College of Osteopathic Medicine, Suwanee, Georgia; and.,Atlanta Veterans Affairs Medical Center, Atlanta, Georgia
| | - Robert S Hoover
- School of Medicine, Emory University, Atlanta, Georgia.,Atlanta Veterans Affairs Medical Center, Atlanta, Georgia
| | - Clintoria R Williams
- School of Medicine, Emory University, Atlanta, Georgia; .,Atlanta Veterans Affairs Medical Center, Atlanta, Georgia
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