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Geurts F, Chaker L, van der Burgh AC, Cronin‐Fenton D, Fenton RA, Hoorn EJ. Urinary Prostaglandin E2 Excretion and the Risk of Cardiovascular and Kidney Disease. J Am Heart Assoc 2024; 13:e032835. [PMID: 38362883 PMCID: PMC11010119 DOI: 10.1161/jaha.123.032835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 01/23/2024] [Indexed: 02/17/2024]
Abstract
BACKGROUND Inhibition of prostaglandin synthesis by nonsteroidal anti-inflammatory drugs is associated with cardiovascular mortality and kidney disease. This study hypothesizes that urinary prostaglandin E2 (PGE2) and PGE2 metabolite (PGEM) excretions are markers of cardiovascular and kidney health, because they reflect both systemic and kidney-derived PGE2 production. METHODS AND RESULTS PGE2 and PGEM were measured in spot urine samples from 2291 participants (≥55 years old) of the population-based Rotterdam Study. Urinary PGE2 and PGEM excretions were analyzed using linear regression analyses to identify cross-sectional associations with cardiovascular risk factors and baseline estimated glomerular filtration rate (eGFR). Longitudinal associations with cardiovascular mortality and kidney outcomes (eGFR <60 or <45 mL/min per 1.73 m2 and the composite outcome 40% eGFR loss or kidney failure) were assessed with Cox regression. Urinary PGE2 and PGEM excretions were higher with increasing age, lower eGFR, smoking, diabetes, and albuminuria. A 2-fold higher urinary PGE2 and PGEM excretion was associated with a higher risk of cardiovascular mortality (28 825 patient-years; 160 events; PGE2 hazard ratio [HR], 1.27, [95% CI, 1.06-1.54]; PGEM HR, 1.36 [95% CI, 1.10-1.67]). Higher PGE2 excretions were also associated with a higher risk of incident eGFR <60 mL/min per 1.73 m2 (31 530 person-years; 691 events; HR, 1.13 [95% CI, 1.02-1.25]) with similar HRs for the other kidney outcomes. CONCLUSIONS Urinary PGE2 and PGEM excretions are novel markers for the presence and progression of cardiovascular and kidney disease. Future studies should address whether these associations are causal and can be targeted to improve cardiovascular and kidney outcomes.
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Affiliation(s)
- Frank Geurts
- Department of Internal Medicine, Erasmus Medical CenterUniversity Medical Center RotterdamRotterdamThe Netherlands
- Department of Epidemiology, Erasmus Medical CenterUniversity Medical Center RotterdamRotterdamThe Netherlands
| | - Layal Chaker
- Department of Internal Medicine, Erasmus Medical CenterUniversity Medical Center RotterdamRotterdamThe Netherlands
- Department of Epidemiology, Erasmus Medical CenterUniversity Medical Center RotterdamRotterdamThe Netherlands
| | - Anna C. van der Burgh
- Department of Epidemiology, Erasmus Medical CenterUniversity Medical Center RotterdamRotterdamThe Netherlands
| | - Deirdre Cronin‐Fenton
- Department of Clinical Epidemiology, Department of Clinical MedicineAarhus University Hospital and Aarhus UniversityAarhusDenmark
| | | | - Ewout J. Hoorn
- Department of Internal Medicine, Erasmus Medical CenterUniversity Medical Center RotterdamRotterdamThe Netherlands
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2
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Nagatani Y, Higashino T, Kinoshita K, Higashino H. Thromboxane A 2 receptor antagonist (ONO-8809) attenuates renal disorders caused by salt overload in stroke-prone spontaneously hypertensive rats. Clin Exp Pharmacol Physiol 2021; 48:1391-1401. [PMID: 34152603 PMCID: PMC8518871 DOI: 10.1111/1440-1681.13543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 06/11/2021] [Accepted: 06/18/2021] [Indexed: 11/28/2022]
Abstract
Epidemiological and clinical studies have demonstrated that excessive salt intake causes severe hypertension and exacerbates organ derangement, such as in chronic kidney disease (CKD). In this study, we focused on evaluating the histological and gene expression effects in the kidneys of stroke‐prone spontaneously hypertensive rats (SHRSP) with a high salt intake and the thromboxane A2/ prostaglandin H2 receptor (TPR) blocker ONO‐8809. Six‐week‐old SHRSPs were divided into three groups and were fed normal chow containing 0.4% NaCl, 2.0%NaCl or 2.0%NaCl + ONO‐8809 (0.6 mg/kg p.o. daily). Histological analyses with immunohistochemistry and a gene expression assay with a DNA kidney microarray were performed after 8 weeks. The following changes were observed in SHRSPs with the high salt intake. Glomerular sclerotic changes were remarkably observed in the juxtamedullary cortex areas. The ED1, monocyte chemoattractant protein‐1 (MCP‐1), nitrotyrosine and hypoxia inducible factor 1α (HIF‐1α) staining areas were increased in the glomeruli and interstitial portion of the kidneys. The genes Tbxa2r (that encodes TPR), Prcp and Car7 were significantly underexpressed in the kidneys. The plasma 8‐isoprostane level was significantly elevated and was attenuated with the ONO‐8809 treatment. Thromboxane A2 (TXA2) and oxidative stress exaggerated renal dysfunction in the salt‐loaded SHRSPs, and ONO‐8809 as a TPR blocker suppressed these changes. Therefore, ONO‐8809 is a candidate drug to prevent CKD in hypertensive patients when CKD is associated with a high salt intake.
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Affiliation(s)
- Yusuke Nagatani
- Department of Pharmacology, Kindai University School of Medicine, Osaka, Japan.,The First Hospital of Welfare-Medical Association, Osaka, Japan
| | - Toshihide Higashino
- Department of Dermatology, Self Defense Forces' Central Hospital, Setagaya, Tokyo, Japan.,Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Kosho Kinoshita
- Department of Pharmacology, Kindai University School of Medicine, Osaka, Japan.,Kosho Clinic, Nishinomiya, Hyogo, Japan
| | - Hideaki Higashino
- Department of Pharmacology, Kindai University School of Medicine, Osaka, Japan
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3
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Jaimes EA, Zhou MS, Siddiqui M, Rezonzew G, Tian R, Seshan SV, Muwonge AN, Wong NJ, Azeloglu EU, Fornoni A, Merscher S, Raij L. Nicotine, smoking, podocytes, and diabetic nephropathy. Am J Physiol Renal Physiol 2021; 320:F442-F453. [PMID: 33459165 PMCID: PMC7988804 DOI: 10.1152/ajprenal.00194.2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 01/07/2021] [Accepted: 01/08/2021] [Indexed: 12/13/2022] Open
Abstract
Diabetic nephropathy (DN) is the leading cause of end-stage kidney disease. Besides glycemic and blood pressure control, environmental factors such as cigarette smoking (CS) adversely affect the progression of DN. The effects of CS on DN progression have been attributed to combustion-generated molecules without consideration to the role of nicotine (NIC), responsible for the addictive properties of both CS and electronic cigarettes (ECs). Podocytes are essential to preserve the structure and function of the glomerular filtration barrier, and strong evidence indicates that early podocyte loss promotes DN progression. We performed experiments in human podocytes and in a mouse model of diabetes that develops nephropathy resembling human DN. We determined that NIC binding to podocytes in concentrations achieved with CS and ECs activated NADPH oxidase, which sets in motion a dysfunctional molecular network integrated by cyclooxygenase 2, known to induce podocyte injury; downregulation of AMP-activated protein kinase, important for maintaining cellular energy stores and antioxidation; and upregulation of CD36, which increased lipid uptake and promoted apoptosis. In diabetic mice, NIC increased proteinuria, a recognized marker of chronic kidney disease progression, accompanied by reduced glomerular podocyte synaptopodin, a crucial stabilizer of the podocyte cytoskeleton, and increased fibronectin expression. This novel study critically implicates NIC itself as a contributor to DN progression in CS and EC users.NEW & NOTEWORTHY In this study, we demonstrate that nicotine increases the production of reactive oxygen species, increases cyclooxygenase-2 expression, and upregulates Cd36 while inducing downregulation of AMP-activated protein kinase. In vivo nicotine increases proteinuria and fibronectin expression in diabetic mice. This study demonstrates that effects of nicotine on podocytes are responsible, at least in part, for the deleterious effects of smoking in the progression of chronic kidney disease, including diabetic nephropathy.
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Affiliation(s)
- Edgar A Jaimes
- Renal Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Ming-Sheng Zhou
- Department of Physiology, Shenyang Medical University, Shenyang, China
| | - Mohammed Siddiqui
- Renal Division, University of Alabama at Birmingham, Birmingham, Alabama
| | - Gabriel Rezonzew
- Renal Division, University of Alabama at Birmingham, Birmingham, Alabama
| | - Runxia Tian
- Nephrology Section, Miami Veterans Affairs Medical Center, Miami, Florida
| | - Surya V Seshan
- Department of Pathology, Weill Cornell Medical College, New York, New York
| | - Alecia N Muwonge
- Division of Nephrology, Department of Medicine, Icahn Mount Sinai School of Medicine, New York, New York
| | - Nicholas J Wong
- Division of Nephrology, Department of Medicine, Icahn Mount Sinai School of Medicine, New York, New York
| | - Evren U Azeloglu
- Division of Nephrology, Department of Medicine, Icahn Mount Sinai School of Medicine, New York, New York
| | - Alessia Fornoni
- Katz Family Division of Nephrology and Hypertension, University of Miami Miller School of Medicine, Miami, Florida
| | - Sandra Merscher
- Katz Family Division of Nephrology and Hypertension, University of Miami Miller School of Medicine, Miami, Florida
| | - Leopoldo Raij
- Katz Family Division of Nephrology and Hypertension, University of Miami Miller School of Medicine, Miami, Florida
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4
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Kelly D, Rothwell PM. Disentangling the multiple links between renal dysfunction and cerebrovascular disease. J Neurol Neurosurg Psychiatry 2020; 91:88-97. [PMID: 31511306 PMCID: PMC6952845 DOI: 10.1136/jnnp-2019-320526] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 07/29/2019] [Accepted: 08/07/2019] [Indexed: 11/30/2022]
Abstract
Chronic kidney disease (CKD) has a rapidly rising global prevalence, affecting as many as one-third of the population over the age of 75 years. CKD is a well-known risk factor for cardiovascular disease and, in particular, there is a strong association with stroke. Cohort studies and trials indicate that reduced glomerular filtration rate increases the risk of stroke by about 40% and that proteinuria increases the risk by about 70%. In addition, CKD is also strongly associated with subclinical cerebrovascular abnormalities, vascular cognitive impairment and dementia. The mechanisms responsible for these associations are currently unclear. CKD is associated with traditional risk factors such as hypertension, diabetes mellitus and atrial fibrillation, but non-traditional risk factors such as uraemia, oxidative stress, mineral and bone abnormalities, and dialysis-related factors, such as changes in cerebral blood flow or cardiac structure, are also postulated to play a role. Kidney disease can also impact and complicate the treatments used in acute stroke and in secondary prevention. In this review, we will outline our current understanding of the epidemiology and pathophysiology of cerebrovascular disease in CKD.
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Affiliation(s)
- Dearbhla Kelly
- Centre for the Prevention of Stroke and Dementia, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Peter Malcolm Rothwell
- Centre for the Prevention of Stroke and Dementia, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
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5
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Rangarajan S, Rezonzew G, Chumley P, Fatima H, Golovko MY, Feng W, Hua P, Jaimes EA. COX-2-derived prostaglandins as mediators of the deleterious effects of nicotine in chronic kidney disease. Am J Physiol Renal Physiol 2019; 318:F475-F485. [PMID: 31841390 DOI: 10.1152/ajprenal.00407.2019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Tobacco smoking has been identified as a risk factor in the progression of chronic kidney disease (CKD). In previous studies, we showed that nicotine induces cyclooxygenase (COX)-2 expression in vivo and in vitro and that the administration of nicotine in vivo worsens the severity of renal injury in a model of subtotal renal ablation. In the present study, we tested the role of COX-2-derived prostaglandins on the deleterious effects of nicotine in CKD. Sham and 5/6 nephrectomy (5/6Nx) rats received tap water or nicotine (100 μg/mL) in the drinking water for 12 wk. Additional groups also systemically received the COX-2 inhibitor NS-398 (1.5 mg·kg-1·day-1 via osmotic minipump). The administration of nicotine worsened renal injury and proteinuria in 5/6Nx rats and increased proteinuria in sham rats. 5/6Nx rats had increased cortical production of the prostaglandins PGE2, PGI2, PGD2, and PGF2α and of thromboxane A2. In these rats, nicotine reduced the production of all prostaglandins examined except thromboxane A2. Treatment with the COX-2 inhibitor NS-398 resulted in complete inhibition of all prostaglandins studied and ameliorated renal injury and proteinuria in 5/6Nx rats on nicotine but not in 5/6 Nx rats on tap water. Nicotine also reduced the expression of megalin in all groups examined, and this was partially prevented by COX-2 inhibition. In the present study, we showed that in CKD, nicotine worsens renal injury at least in part by producing an imbalance in the production of prostaglandins. This imbalance in the production of prostaglandins likely plays a role in the deleterious effects of smoking on the progression of CKD.
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Affiliation(s)
- S Rangarajan
- Renal Division, University of Alabama at Birmingham, Birmingham, Alabama
| | - G Rezonzew
- Renal Division, University of Alabama at Birmingham, Birmingham, Alabama
| | - P Chumley
- Renal Division, University of Alabama at Birmingham, Birmingham, Alabama
| | - H Fatima
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama
| | - M Y Golovko
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, North Dakota
| | - W Feng
- Renal Division, University of Alabama at Birmingham, Birmingham, Alabama
| | - P Hua
- Renal Division, University of Alabama at Birmingham, Birmingham, Alabama
| | - E A Jaimes
- Renal Service, Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College, New York, New York
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6
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Over-expression of a cardiac-specific human dopamine D5 receptor mutation in mice causes a dilated cardiomyopathy through ROS over-generation by NADPH oxidase activation and Nrf2 degradation. Redox Biol 2018; 19:134-146. [PMID: 30153650 PMCID: PMC6111036 DOI: 10.1016/j.redox.2018.07.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 07/10/2018] [Accepted: 07/12/2018] [Indexed: 12/26/2022] Open
Abstract
Dilated cardiomyopathy (DCM) is a severe disorder caused by medications or genetic mutations. D5 dopamine receptor (D5R) gene knockout (D5-/-) mice have cardiac hypertrophy and high blood pressure. To investigate the role and mechanism by which the D5R regulates cardiac function, we generated cardiac-specific human D5R F173L(hD5F173L-TG) and cardiac-specific human D5R wild-type (hD5WT-TG) transgenic mice, and H9c2 cells stably expressing hD5F173L and hD5WT. We found that cardiac-specific hD5F173L-TG mice, relative to hD5WT-TG mice, presented with DCM and increased cardiac expression of cardiac injury markers, NADPH oxidase activity, Nrf2 degradation, and activated ERK1/2/JNK pathway. H9c2-hD5F173L cells also had an increase in NADPH oxidase activity, Nrf2 degradation, and phospho-JNK (p-JNK) expression. A Nrf2 inhibitor also increased p-JNK expression in H9c2-hD5F173L cells but not in H9c2-hD5WT cells. We suggest that the D5R may play an important role in the preservation of normal heart function by inhibiting the production of reactive oxygen species, via inhibition of NADPH oxidase, Nrf2 degradation, and ERK1/2/JNK pathways.
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7
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Anti-Renal Fibrotic Effect of Exercise Training in Hypertension. Int J Mol Sci 2018; 19:ijms19020613. [PMID: 29461477 PMCID: PMC5855835 DOI: 10.3390/ijms19020613] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/07/2018] [Accepted: 02/13/2018] [Indexed: 01/26/2023] Open
Abstract
The purpose of this study was to evaluate the effects of exercise training on renal fibrosis in hypertensive rats. Masson's trichrome staining and Western blotting were performed on the excised renal cortex from sixteen male spontaneously hypertensive rats (SHR), which were randomly divided into either a sedentary hypertensive group (SHR) or exercise hypertensive group (SHR-EX, running on an exercise treadmill for 60 min/day, 5 sessions/week, for 12 weeks), and from eight male Wistar-Kyoto rats which served as a sedentary normotensive group (WKY). The systolic blood pressure (SBP) and renal fibrosis in hypertensive rats improved after exercise training. The inflammatory-related protein levels of interleukin-6 (IL-6) and cyclooxygenase-2 (COX-2), as well as the fibrotic-related protein levels of transforming growth factor-beta (TGF-β), phospho-Smad2/3 (p-Smad2/3), connective tissue growth factor (CTGF), matrix metalloproteinase-9 (MMP-9), and matrix metalloproteinase-2 (MMP-2) were decreased in the SHR-EX group when compared with the SHR group. Exercise training suppressed the hypertension-induced renal cortical inflammatory and fibrotic pathways in hypertensive rat models. These findings might indicate a new therapeutic effect for exercise training to prevent renal fibrosis in hypertensive nephropathy.
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8
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Liu J, Yan Y, Nie Y, Shapiro JI. Na/K-ATPase Signaling and Salt Sensitivity: The Role of Oxidative Stress. Antioxidants (Basel) 2017; 6:E18. [PMID: 28257114 PMCID: PMC5384181 DOI: 10.3390/antiox6010018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 02/10/2017] [Accepted: 02/22/2017] [Indexed: 02/07/2023] Open
Abstract
Other than genetic regulation of salt sensitivity of blood pressure, many factors have been shown to regulate renal sodium handling which contributes to long-term blood pressure regulation and have been extensively reviewed. Here we present our progress on the Na/K-ATPase signaling mediated sodium reabsorption in renal proximal tubules, from cardiotonic steroids-mediated to reactive oxygen species (ROS)-mediated Na/K-ATPase signaling that contributes to experimental salt sensitivity.
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Affiliation(s)
- Jiang Liu
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA.
| | - Yanling Yan
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA.
| | - Ying Nie
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA.
| | - Joseph I Shapiro
- Department of Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
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9
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Côco H, Pernomian L, Pereira PC, Gomes MS, Marchi KC, Lopes AH, Cunha TM, Tirapelli CR, de Oliveira AM. Chronic restraint stress increases angiotensin II potency in the rat carotid: role of cyclooxygenases and reactive oxygen species. ACTA ACUST UNITED AC 2016; 69:52-65. [PMID: 27774650 DOI: 10.1111/jphp.12659] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 10/02/2016] [Indexed: 12/22/2022]
Abstract
OBJECTIVES To investigate the mechanisms underlying the effects of chronic restraint stress on the vascular contractile response induced by angiotensin (Ang) II in rat carotid. METHODS Concentration-response curves for AngII were obtained in endothelium-intact or endothelium-denuded carotid rings, in the absence or presence of SC-560 (COX-1 inhibitor), SC-236 (COX-2 inhibitor), wortmannin (PI3 K-Akt inhibitor), ML171 (NOX-1 inhibitor), VAS2870 (NOX-4 inhibitor), tiron (O2- scavenger) or PEG-catalase (H2 O2 scavenger). 6-ketoPGF1α , TXB2 , O2- or H2 O2 levels and superoxide dismutase and catalase activity or expression were also measured in rat carotid. KEY FINDINGS Stress increased AngII potency in rat carotid. Muscular COX-1 or COX-2-derived metabolites negatively modulated AngII-induced contraction in control rat carotid. Endothelial COX-1 or COX-2-derived metabolites positively modulated AngII-induced contraction in stressed rat carotid. PI3 K-Akt, NOX-1, NOX-4, O2- and H2 O2 positively modulated AngII-induced contraction in stressed rat carotid. Stress increased 6-ketoPGF1α or H2 O2 generation and reduced catalase activity in rat carotid. Protein expression of COX-1, NOX-4 or p-Akt was increased in stressed rat carotid. CONCLUSIONS Stress increases AngII potency in rat carotid by a mechanism that involves the increased generation of PGI2 and H2 O2 and the activation of Akt pathway. Such mechanism could play a pathophysiological role in cardiovascular diseases correlated with stress.
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Affiliation(s)
- Hariane Côco
- Departament of Pharmacology, School of Medicine from Ribeirão Preto, Ribeirão Preto, SP, Brazil.,Laboratory of Vascular Injury, School of Pharmaceutical Sciences from Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Larissa Pernomian
- Laboratory of Vascular Injury, School of Pharmaceutical Sciences from Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Priscila C Pereira
- Departament of Pharmacology, School of Medicine from Ribeirão Preto, Ribeirão Preto, SP, Brazil.,Laboratory of Vascular Injury, School of Pharmaceutical Sciences from Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Mayara S Gomes
- Laboratory of Vascular Injury, School of Pharmaceutical Sciences from Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Katia C Marchi
- Departament of Pharmacology, School of Medicine from Ribeirão Preto, Ribeirão Preto, SP, Brazil.,Laboratory of Pharmacology, School of Nursing from Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Alexandre H Lopes
- Departament of Pharmacology, School of Medicine from Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Thiago M Cunha
- Departament of Pharmacology, School of Medicine from Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Carlos R Tirapelli
- Laboratory of Pharmacology, School of Nursing from Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Ana M de Oliveira
- Laboratory of Vascular Injury, School of Pharmaceutical Sciences from Ribeirão Preto, Ribeirão Preto, SP, Brazil
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10
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Lau WL, Huisa BN, Fisher M. The Cerebrovascular-Chronic Kidney Disease Connection: Perspectives and Mechanisms. Transl Stroke Res 2016; 8:67-76. [PMID: 27628245 PMCID: PMC5241336 DOI: 10.1007/s12975-016-0499-x] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 08/21/2016] [Accepted: 08/25/2016] [Indexed: 12/12/2022]
Abstract
Chronic kidney disease (CKD) is an independent risk factor for the development of cerebrovascular disease, particularly small vessel disease which can manifest in a variety of phenotypes ranging from lacunes to microbleeds. Small vessel disease likely contributes to cognitive dysfunction in the CKD population. Non-traditional risk factors for vascular injury in uremia include loss of calcification inhibitors, hyperphosphatemia, increased blood pressure variability, elastinolysis, platelet dysfunction, and chronic inflammation. In this review, we discuss the putative pathways by which these mechanisms may promote cerebrovascular disease and thus increase risk of future stroke in CKD patients.
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Affiliation(s)
- Wei Ling Lau
- Department of Medicine, Division of Nephrology, University of California, Irvine, CA, USA
| | - Branko N Huisa
- Department of Neurology, University of California, San Diego, CA, USA
| | - Mark Fisher
- Departments of Neurology, Anatomy & Neurobiology, and Pathology & Laboratory Medicine, University of California, Irvine, CA, USA. .,Department of Neurology, UC Irvine Medical Center, 101 The City Drive South, Shanbrom Hall, Room 121, Orange, CA, 92868, USA.
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11
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Quadri SS, Culver SA, Li C, Siragy HM. Interaction of the renin angiotensin and cox systems in the kidney. Front Biosci (Schol Ed) 2016; 8:215-26. [PMID: 27100703 DOI: 10.2741/s459] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Cyclooxygenase-2 (COX-2) plays an important role in mediating actions of the renin-angiotensin system (RAS). This review sheds light on the recent developments regarding the complex interactions between components of RAS and COX-2; and their implications on renal function and disease. COX-2 is believed to counter regulate the effects of RAS activation and therefore counter balance the vasoconstriction effect of Ang II. In kidney, under normal conditions, these systems are essential for maintaining a balance between vasodilation and vasoconstriction. However, recent studies suggested a pivotal role for this interplay in pathology. COX-2 increases the renin release and Ang II formation leading to increase in blood pressure. COX-2 is also associated with diabetic nephropathy, where its upregulation in the kidney contributes to glomerular injury and albuminuria. Selective inhibition of COX-2 retards the progression of renal injury. COX-2 also mediates the pathologic effects of the (Pro)renin receptor (PRR) in the kidney. In summary, this review discusses the interaction between the RAS and COX-2 in health and disease.
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Affiliation(s)
- Syed S Quadri
- Division of Endocrinology and Metabolism, University of Virginia Health System, Charlottesville, VA
| | - Silas A Culver
- Division of Endocrinology and Metabolism, University of Virginia Health System, Charlottesville, VA
| | - Caixia Li
- Division of Endocrinology and Metabolism, University of Virginia Health System, Charlottesville, VA
| | - Helmy M Siragy
- Division of Endocrinology and Metabolism, University of Virginia Health System, Charlottesville, VA,
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12
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Liu X, Wang W, Chen W, Jiang X, Zhang Y, Wang Z, Yang J, Jones JE, Jose PA, Yang Z. Regulation of blood pressure, oxidative stress and AT1R by high salt diet in mutant human dopamine D5 receptor transgenic mice. Hypertens Res 2015; 38:394-9. [PMID: 25716648 PMCID: PMC6400478 DOI: 10.1038/hr.2015.17] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 01/12/2015] [Accepted: 01/25/2015] [Indexed: 12/20/2022]
Abstract
Humans have dopamine D5 receptors (hD5R) with single-nucleotide polymorphisms and a diminished function. We generated hD5(F173L) cDNA that has a decreased response to D5R agonist-mediated increase in cAMP production and increased production of reactive oxygen species, relative to wild-type hD5R (hD5(WT)) cDNA expressed in Chinese hamster ovary cells. To investigate the role of hD5(F173L) in the pathogenesis of salt-sensitive hypertension, we generated transgenic mice overexpressing hD5(F173L) or hD5(WT) and fed them normal (0.8% NaCl) or high (4% NaCl) salt diet. On normal salt diet, the blood pressure, and renal NADPH oxidase activity and angiotensin type 1 receptor (AT1R) expression were higher in hD5(F173L) than hD5(WT) transgenic mice. After 2 weeks on high salt diet, the blood pressure and renal NADPH oxidase activity, but not AT1R expression, were increased in hD5(F173L) but not in hD5(WT) transgenic mice. Candesartan, an AT1R antagonist, decreased the blood pressure and NADPH oxidase activity in hD5(F173L) but not in hD5(WT) transgenic mice. We suggest that the ability of the hD5R to negatively regulate the renal NADPH oxidase activity and AT1R function may have important implications in the pathogenesis of salt-sensitive blood pressure. However, the mechanisms involved in regulating the balance of renal D5R and AT1R function in the oxidative stress-mediated salt-sensitive blood pressure remain to be determined.
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Affiliation(s)
- Xing Liu
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical Collage (PUMC), Beijing, People's Republic China
| | - Wenjie Wang
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical Collage (PUMC), Beijing, People's Republic China
| | - Wei Chen
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical Collage (PUMC), Beijing, People's Republic China
| | - Xiaoliang Jiang
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical Collage (PUMC), Beijing, People's Republic China
| | - Yanrong Zhang
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical Collage (PUMC), Beijing, People's Republic China
| | - Zihao Wang
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical Collage (PUMC), Beijing, People's Republic China
| | - Jian Yang
- Division of Nephrology, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - John E Jones
- Division of Nephrology, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Pedro A Jose
- 1] Division of Nephrology, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA [2] Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Zhiwei Yang
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical Collage (PUMC), Beijing, People's Republic China
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13
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Feng W, Chumley P, Prieto MC, Miyada K, Seth DM, Fatima H, Hua P, Rezonzew G, Sanders PW, Jaimes EA. Transcription factor avian erythroblastosis virus E26 oncogen homolog-1 is a novel mediator of renal injury in salt-sensitive hypertension. Hypertension 2015; 65:813-20. [PMID: 25624342 DOI: 10.1161/hypertensionaha.114.04533] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Transcription factor E26 transformation-specific sequence-1 (ETS-1) is a transcription factor that regulates the expression of a variety of genes, including growth factors, chemokines, and adhesion molecules. We recently demonstrated that angiotensin II increases the glomerular expression of ETS-1 and that blockade of ETS-1 ameliorates the profibrotic and proinflammatory effects of angiotensin II. The Dahl salt-sensitive rat is a paradigm of salt-sensitive hypertension associated with local activation of the renin-angiotensin system. In these studies, we determined whether: (1) salt-sensitive hypertension is associated with renal expression of ETS-1 and (2) ETS-1 participates in the development of end-organ injury in salt-sensitive hypertension. Dahl salt-sensitive rats were fed a normal-salt diet (0.5% NaCl diet) or a high-salt diet (4% NaCl) for 4 weeks. Separate groups on high-salt diet received an ETS-1 dominant-negative peptide (10 mg/kg/d), an inactive ETS-1 mutant peptide (10 mg/kg/d), the angiotensin II type 1 receptor blocker candesartan (10 mg/kg/d), or the combination high-salt diet/dominant-negative peptide/angiotensin II type 1 receptor blocker for 4 weeks. High-salt diet rats had a significant increase in the glomerular expression of the phosphorylated ETS-1 that was prevented by angiotensin II type 1 receptor blocker. ETS-1 blockade reduced proteinuria, glomerular injury score, fibronectin expression, urinary transforming growth factor-β excretion, and macrophage infiltration. Angiotensin II type 1 receptor blocker reduced proteinuria, glomerular injury score, and macrophage infiltration, whereas concomitant ETS-1 blockade and angiotensin II type 1 receptor blocker had additive effects and reduced interstitial fibrosis. Our studies demonstrated that salt-sensitive hypertension results in increased glomerular expression of phosphorylated ETS-1 and suggested that ETS-1 plays an important role in the pathogenesis of end-organ injury in salt-sensitive hypertension.
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Affiliation(s)
- Wenguang Feng
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.)
| | - Phillip Chumley
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.)
| | - Minolfa C Prieto
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.)
| | - Kayoko Miyada
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.)
| | - Dale M Seth
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.)
| | - Huma Fatima
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.)
| | - Ping Hua
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.)
| | - Gabriel Rezonzew
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.)
| | - Paul W Sanders
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.)
| | - Edgar A Jaimes
- From the Division of Nephrology (W.F., P.C., P.H., G.R., P.W.S.) and Department of Pathology (H.F.), University of Alabama at Birmingham; Department of Physiology, Tulane University, New Orleans, LA (M.C.P., K.M., D.M.S.); Nephrology Section, VA Medical Center, Birmingham, AL (P.W.S., E.A.J.); and Renal Service, Memorial Sloan Kettering Cancer Center, New York, NY (E.A.J.).
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14
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Saez F, Reverte V, Paliege A, Moreno JM, Llinás MT, Bachmann S, Salazar FJ. Sex-dependent hypertension and renal changes in aged rats with altered renal development. Am J Physiol Renal Physiol 2014; 307:F461-70. [DOI: 10.1152/ajprenal.00198.2014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Numerous studies have evaluated blood pressure (BP) and renal changes in several models of developmental programming of hypertension. The present study examined to what extent BP, renal hemodynamic, and renal structure are affected at an old age in male and female animals with altered renal development. It also evaluated whether renal damage is associated with changes in cyclooxygenase (COX)-2 and neuronal nitric oxide synthase (NOS1) expression and immunoreactivity. Experiments were carried out in rats at 10–11 and 16–17 mo of age treated with vehicle or an ANG II type 1 receptor antagonist during the nephrogenic period (ARAnp). A progressive increment in BP and a deterioration of renal hemodynamics were found in both sexes of ARAnp-treated rats, with these changes being greater ( P < 0.05) in male rats. The decrease in glomerular filtration rate at the oldest age was greater ( P < 0.05) in male (74%) than female (32%) ARAnp-treated rats. Sex-dependent deterioration of renal structure was demonstrated in optical and electron microscopic experiments. COX-2 and NOS1 immunoreactivity were enhanced in the macula densa of male but not female ARAnp-treated rats. The present study reports novel findings suggesting that stimuli that induce a decrease of ANG II effects during renal development lead to a progressive increment in BP and renal damage at an old age in both sexes, but these BP and renal changes are greater in males than in females. The renal damage is associated with an increase of COX-2 and NOS1 in the macula densa of males but not females with altered renal development.
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Affiliation(s)
- Fara Saez
- Department of Physiology, University of Murcia, Regional Campus of International Excellence “Mare Nostrum,” Murcia, Instituto Murciano de Investigación Biomédica, Spain; and
| | - Virginia Reverte
- Department of Physiology, University of Murcia, Regional Campus of International Excellence “Mare Nostrum,” Murcia, Instituto Murciano de Investigación Biomédica, Spain; and
| | - Alexander Paliege
- Anatomisches Institut, Charité, Humboldt Universität, Berlin, Germany
| | - Juan Manuel Moreno
- Department of Physiology, University of Murcia, Regional Campus of International Excellence “Mare Nostrum,” Murcia, Instituto Murciano de Investigación Biomédica, Spain; and
| | - María T. Llinás
- Department of Physiology, University of Murcia, Regional Campus of International Excellence “Mare Nostrum,” Murcia, Instituto Murciano de Investigación Biomédica, Spain; and
| | | | - F. Javier Salazar
- Department of Physiology, University of Murcia, Regional Campus of International Excellence “Mare Nostrum,” Murcia, Instituto Murciano de Investigación Biomédica, Spain; and
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Ren Y, D'Ambrosio MA, Garvin JL, Wang H, Carretero OA. Response to Prostaglandin E2 mediates connecting tubule glomerular feedback. Hypertension 2014; 63:e20. [PMID: 24678525 DOI: 10.1161/hypertensionaha.113.02917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Pérez-Girón JV, Palacios R, Martín A, Hernanz R, Aguado A, Martínez-Revelles S, Barrús MT, Salaices M, Alonso MJ. Pioglitazone reduces angiotensin II-induced COX-2 expression through inhibition of ROS production and ET-1 transcription in vascular cells from spontaneously hypertensive rats. Am J Physiol Heart Circ Physiol 2014; 306:H1582-93. [PMID: 24727493 DOI: 10.1152/ajpheart.00924.2013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Glitazones have anti-inflammatory properties by interfering with the transcription of proinflammatory genes, such as cyclooxygenase (COX)-2, and with ROS production, which are increased in hypertension. This study analyzed whether pioglitazone modulates COX-2 expression in hypertension by interfering with ROS and endothelin (ET)-1. In vivo, pioglitazone (2.5 mg·kg(-1)·day(-1), 28 days) reduced the greater levels of COX-2, pre-pro-ET-1, and NADPH oxidase (NOX) expression and activity as well as O2 (·-) production found in aortas from spontaneously hypertensive rats (SHRs). ANG II increased COX-2 and pre-pro-ET-1 levels more in cultured vascular smooth muscle cells from hypertensive rats compared with normotensive rats. The ETA receptor antagonist BQ-123 reduced ANG II-induced COX-2 expression in SHR cells. ANG II also increased NOX-1 expression, NOX activity, and superoxide production in SHR cells; the selective NOX-1 inhibitor ML-171 and catalase reduced ANG II-induced COX-2 and ET-1 transcription. ANG II also increased c-Jun transcription and phospho-JNK1/2, phospho-c-Jun, and p65 NF-κB subunit nuclear protein expression. SP-600125 and lactacystin, JNK and NF-κB inhibitors, respectively, reduced ANG II-induced ET-1, COX-2, and NOX-1 levels and NOX activity. Pioglitazone reduced the effects of ANG II on NOX activity, NOX-1, pre-pro-ET-1, COX-2, and c-Jun mRNA levels, JNK activation, and nuclear phospho-c-Jun and p65 expression. In conclusion, ROS production and ET-1 are involved in ANG II-induced COX-2 expression in SHRs, explaining the greater COX-2 expression observed in this strain. Furthermore, pioglitazone inhibits ANG II-induced COX-2 expression likely by interfering with NF-κB and activator protein-1 proinflammatory pathways and downregulating ROS production and ET-1 transcription, thus contributing to the anti-inflammatory properties of glitazones.
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Affiliation(s)
- Jose V Pérez-Girón
- Departamento de Bioquímica, Fisiología y Genética Molecular, Universidad Rey Juan Carlos, Alcorcón, Spain; and
| | - Roberto Palacios
- Departamento de Bioquímica, Fisiología y Genética Molecular, Universidad Rey Juan Carlos, Alcorcón, Spain; and
| | - Angela Martín
- Departamento de Bioquímica, Fisiología y Genética Molecular, Universidad Rey Juan Carlos, Alcorcón, Spain; and
| | - Raquel Hernanz
- Departamento de Bioquímica, Fisiología y Genética Molecular, Universidad Rey Juan Carlos, Alcorcón, Spain; and
| | - Andrea Aguado
- Departamento de Farmacología, Universidad Autónoma de Madrid, Instituto de Investigación Hospital Universitario La Paz, Madrid, Spain
| | - Sonia Martínez-Revelles
- Departamento de Farmacología, Universidad Autónoma de Madrid, Instituto de Investigación Hospital Universitario La Paz, Madrid, Spain
| | - María T Barrús
- Departamento de Bioquímica, Fisiología y Genética Molecular, Universidad Rey Juan Carlos, Alcorcón, Spain; and
| | - Mercedes Salaices
- Departamento de Farmacología, Universidad Autónoma de Madrid, Instituto de Investigación Hospital Universitario La Paz, Madrid, Spain
| | - María J Alonso
- Departamento de Bioquímica, Fisiología y Genética Molecular, Universidad Rey Juan Carlos, Alcorcón, Spain; and
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17
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Affiliation(s)
- Fernando Elijovich
- Division of Clinical Pharmacology
Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
| | - Cheryl L. Laffer
- Division of Clinical Pharmacology
Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
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18
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Abstract
In the mammalian kidney, prostaglandins (PGs) are important mediators of physiologic processes, including modulation of vascular tone and salt and water. PGs arise from enzymatic metabolism of free arachidonic acid (AA), which is cleaved from membrane phospholipids by phospholipase A2 activity. The cyclooxygenase (COX) enzyme system is a major pathway for metabolism of AA in the kidney. COX are the enzymes responsible for the initial conversion of AA to PGG2 and subsequently to PGH2, which serves as the precursor for subsequent metabolism by PG and thromboxane synthases. In addition to high levels of expression of the "constitutive" rate-limiting enzyme responsible for prostanoid production, COX-1, the "inducible" isoform of cyclooxygenase, COX-2, is also constitutively expressed in the kidney and is highly regulated in response to alterations in intravascular volume. PGs and thromboxane A2 exert their biological functions predominantly through activation of specific 7-transmembrane G-protein-coupled receptors. COX metabolites have been shown to exert important physiologic functions in maintenance of renal blood flow, mediation of renin release and regulation of sodium excretion. In addition to physiologic regulation of prostanoid production in the kidney, increases in prostanoid production are also seen in a variety of inflammatory renal injuries, and COX metabolites may serve as mediators of inflammatory injury in renal disease.
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Affiliation(s)
- Raymond C Harris
- George M. O'Brien Kidney and Urologic Diseases Center and Division of Nephrology, Vanderbilt University School of Medicine and Nashville Veterans Affairs Hospital, Nashville, Tennessee, USA.
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19
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Wang H, D'Ambrosio MA, Garvin JL, Ren Y, Carretero OA. Connecting tubule glomerular feedback in hypertension. Hypertension 2013; 62:738-45. [PMID: 23959547 DOI: 10.1161/hypertensionaha.113.01846] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
In Dahl salt-sensitive rats (Dahl SS), glomerular capillary pressure increases in response to high salt intake and this is accompanied by significant glomerular injury compared with spontaneously hypertensive rats with similar blood pressure. Glomerular capillary pressure is controlled mainly by afferent arteriolar resistance, which is regulated by the vasoconstrictor tubule glomerular feedback (TGF) and the vasodilator connecting TGF (CTGF). We hypothesized that Dahl SS have a decreased TGF response and enhanced TGF resetting compared with spontaneously hypertensive rats, and that these differences are attributable in part to an increase in CTGF. In vivo, using micropuncture we measured stop-flow pressure (a surrogate of glomerular capillary pressure). TGF was calculated as the maximal decrease in stop-flow pressure caused by increasing nephron perfusion, TGF resetting as the attenuation in TGF induced by high salt diet, and CTGF as the difference in TGF response before and during CTGF inhibition with benzamil. Compared with spontaneously hypertensive rats, Dahl SS had (1) lower TGF responses in normal (6.6±0.1 versus 11.0±0.2 mm Hg; P<0.001) and high-salt diets (3.3±0.1 versus 10.1±0.3 mm Hg; P<0.001), (2) greater TGF resetting (3.3±0.1 versus 1.0±0.3 mm Hg; P<0.001), and (3) greater CTGF (3.4±0.4 versus 1.2±0.1 mm Hg; P<0.001). We conclude that Dahl SS have lower TGF and greater CTGF than spontaneously hypertensive rats, and that CTGF antagonizes TGF. Furthermore, CTGF is enhanced by a high-salt diet and contributes significantly to TGF resetting. Our findings may explain in part the increase in vasodilatation, glomerular capillary pressure, and glomerular damage in SS hypertension during high salt intake.
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Affiliation(s)
- Hong Wang
- Hypertension and Vascular Research Division, Department of Internal Medicine, Henry Ford Hospital, 2799 West Grand Blvd, Detroit, MI 48202.
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Intrarenal Angiotensin ii is associated with inflammation, renal damage and dysfunction in dahl salt-sensitive hypertension. ACTA ACUST UNITED AC 2012; 3:306-14. [PMID: 20160914 DOI: 10.1016/j.jash.2009.08.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND The goal of this study was to test the hypothesis that intrarenal Ang II has a proinflammatory effect leading to renal damage and dysfunction in Dahl S rats on high Na intake. METHODS Forty-six 7-to 8-week old Dahl S or R/Rapp strain rats were maintained for 5 weeks on high sodium (8%) with or without candesartan cilexetil in daily doses of 10-15 mg/kg/day. Arterial catheters were implanted at day 28. RESULTS By day 35 in the high Na S + candesartan rats, renal tissue Ang II concentration, renal monocytes/macrophages, TNFalpha, and MCP-1 significantly decreased. Plasma Ang II remained at very low levels in all groups. Reduced renal damage in candesartan-treated Dahl S rats was demonstrated by marked decreases in urinary protein excretion and renal glomerular and interstitial damage. After 5 weeks of high Na, compared to high Na Dahl S rats, arterial pressure was unchanged in candesartan S rats, but creatinine clearance was increased. CONCLUSIONS Therefore, candesartan reduced renal tissue Ang II, renal damage, infiltration of immune cells, cytokines, chemokines, and improved renal hemodynamics. These data suggest that intrarenal Ang II plays an important role in causing renal inflammation which leads to renal cortical damage, proteinuria, and decreases in renal hemodynamics.
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21
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Feng W, Chumley P, Hua P, Rezonzew G, Jaimes D, Duckworth MW, Xing D, Jaimes EA. Role of the transcription factor erythroblastosis virus E26 oncogen homolog-1 (ETS-1) as mediator of the renal proinflammatory and profibrotic effects of angiotensin II. Hypertension 2012; 60:1226-33. [PMID: 22966006 DOI: 10.1161/hypertensionaha.112.197871] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Angiotensin II (Ang II) plays a major role in the pathogenesis of end-organ injury in hypertension via its diverse hemodynamic and nonhemodynamic effects. Erythroblastosis virus E26 oncogen homolog-1 (ETS-1) is an important transcription factor recently recognized as an important mediator of cell proliferation, inflammation, and fibrosis. In the present studies, we tested the hypothesis that ETS-1 is a common mediator of the renal proinflammatory and profibrotic effects of Ang II. C57BL6 mice (n=6 per group) were infused with vehicle (control), Ang II (1.4 mg/kg per day), Ang II and an ETS-1 dominant-negative peptide (10 mg/kg per day), or Ang II and an ETS-1 mutant peptide (10 mg/kg per day) via osmotic minipump for 2 or 4 weeks. The infusion of Ang II resulted in significant increases in blood pressure and left ventricular hypertrophy, which were not modified by ETS-1 blockade. The administration of ETS-1 dominant-negative peptide significantly attenuated Ang II-induced renal injury as assessed by urinary protein excretion, mesangial matrix expansion, and cell proliferation. Furthermore, ETS-1 dominant-negative peptide but not ETS-1 mutant peptide significantly reduced Ang II-mediated upregulation of transforming growth factor-β, connective tissue growth factor, and α-smooth muscle actin. In addition, ETS-1 blockade reduced several proinflammatory effects of Ang II, including macrophage infiltration, nitrotyrosine expression, and NOX4 mRNA expression. Our studies suggest that ETS-1 is a common mediator of the proinflammatory and profibrotic effects of Ang II-induced hypertensive renal damage and may result in the development of novel strategies in the treatment and prevention of end-organ injury in hypertension.
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Affiliation(s)
- Wenguang Feng
- Division of Nephrology, University of Alabama at Birmingham, Ziegler Research Building 637, 1530 3rd Ave South, Birmingham, AL 35294, USA
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Park EJ, Kwon TK. Rottlerin enhances IL-1β-induced COX-2 expression through sustained p38 MAPK activation in MDA-MB-231 human breast cancer cells. Exp Mol Med 2012; 43:669-75. [PMID: 21971413 DOI: 10.3858/emm.2011.43.12.077] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Cyclooxygenase-2 (COX-2) is an important enzyme in inflammation. In this study, we investigated the underlying molecular mechanism of the synergistic effect of rottlerin on interleukin1β (IL-1β)-induced COX-2 expression in MDA-MB-231 human breast cancer cell line. Treatment with rottlerin enhanced IL-1β-induced COX-2 expression at both the protein and mRNA levels. Combined treatment with rottlerin and IL-1β significantly induced COX-2 expression, at least in part, through the enhancement of COX-2 mRNA stability. In addition, rottlerin and IL-1β treatment drove sustained activation of p38 Mitogen-activated protein kinase (MAPK), which is involved in induced COX-2 expression. Also, a pharmacological inhibitor of p38 MAPK (SB 203580) and transient transfection with inactive p38 MAPK inhibited rottlerin and IL-1β-induced COX-2 upregulation. However, suppression of protein kinase C δ (PKC δ) expression by siRNA or overexpression of dominant-negative PKC δ (DN-PKC-δ) did not abrogate the rottlerin plus IL-1β-induced COX-2 expression. Furthermore, rottlerin also enhanced tumor necrosis factor-α (TNF-α), phorbol myristate acetate (PMA), and lipopolysaccharide (LPS)-induced COX-2 expression. Taken together, our results suggest that rottlerin causes IL-1β-induced COX-2 upregulation through sustained p38 MAPK activation in MDA-MB-231 human breast cancer cells.
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Affiliation(s)
- Eun Jung Park
- Department of Immunology Keimyung University School of Medicine Daegu 704-701, Korea
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23
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The complex interplay between cyclooxygenase-2 and angiotensin II in regulating kidney function. Curr Opin Nephrol Hypertens 2012; 21:7-14. [PMID: 22080858 DOI: 10.1097/mnh.0b013e32834d9d75] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
PURPOSE OF REVIEW Cyclooxygenase-2 (COX-2) plays a critical role in modulating deleterious actions of angiotensin II (Ang II) where there is an inappropriate activation of the renin-angiotensin system (RAS). This review discusses the recent developments regarding the complex interactions by which COX-2 modulates the impact of an activated RAS on kidney function and blood pressure. RECENT FINDINGS Normal rats with increased COX-2 activity but with different intrarenal Ang II activity because of sodium restriction or chronic treatment with angiotensin-converting enzyme (ACE) inhibitors showed similar renal hemodynamic responses to COX-2-selective inhibition (nimesulide) indicating independence from the intrarenal Ang II activity. COX-2-dependent maintenance of medullary blood flow was consistent and not dependent on dietary salt or ACE inhibition. In contrast, COX-2 influences on sodium excretion were contingent on the prevailing RAS activity. In chronic hypertensive models, COX-2 inhibition elicited similar reductions in kidney function, but COX-2 metabolites contribute to rather than ameliorate the hypertension. SUMMARY The maintenance of renal hemodynamics reflects direct and opposing effects of Ang II and COX-2 metabolites. The antagonism in water and electrolyte reabsorption is dependent on the prevailing intrarenal Ang II activity. The recent functional experiments demonstrate a beneficial modulation of Ang II by COX-2 except in the presence of inflammation promoted by hypertension, hyperglycemia, and oxidative stress.
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Agarwal D, Elks CM, Reed SD, Mariappan N, Majid DS, Francis J. Chronic exercise preserves renal structure and hemodynamics in spontaneously hypertensive rats. Antioxid Redox Signal 2012; 16:139-52. [PMID: 21895524 PMCID: PMC3222098 DOI: 10.1089/ars.2011.3967] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 08/09/2011] [Accepted: 08/09/2011] [Indexed: 12/24/2022]
Abstract
AIMS Exercise training (ExT) is a recommended adjunct to many pharmaceutical antihypertensive therapies. The effects of chronic ExT on the development of hypertension-induced renal injury remain unknown. We examined whether ExT would preserve renal hemodynamics and structure in the spontaneously hypertensive rat (SHR), and whether these effects were mediated by improved redox status and decreased inflammation. Normotensive WKY rats and SHR underwent moderate-intensity ExT for 16 weeks. One group of SHR animals was treated with hydralazine to investigate the pressure-dependent/independent effects of ExT. Acute renal clearance experiments were performed prior to sacrifice. Tissue free radical production rates were measured by electron paramagnetic resonance; gene and protein expression were measured by real time RT-PCR and Western blot or immunofluorescence, respectively. Plasma angiotensin II levels and kidney antioxidants were assessed. Training efficacy was assessed by citrate synthase activity assay in hind-limb muscle. RESULTS ExT delayed hypertension, prevented oxidative stress and inflammation, preserved antioxidant status, prevented an increase in circulating AngII levels, and preserved renal hemodynamics and structure in SHR. In addition, exercise-induced effects, at least, in part, were found to be pressure-independent. INNOVATION This study is the first to provide mechanistic evidence for the renoprotective benefits of ExT in a model of hypertension. Our results demonstrate that initiation of ExT in susceptible patients can delay the development of hypertension and provide renoprotection at the functional and ultrastructural level. CONCLUSION Chronic ExT preserves renal hemodynamics and structure in SHR; these effects are partially mediated by improved redox status and decreased inflammation.
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Affiliation(s)
- Deepmala Agarwal
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, Louisiana
| | - Carrie M. Elks
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, Louisiana
| | - Scott D. Reed
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, Louisiana
| | - Nithya Mariappan
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, Louisiana
| | - Dewan S.A. Majid
- Department of Physiology, Hypertension and Renal Center of Excellence, Tulane University School of Medicine, New Orleans, Louisiana
| | - Joseph Francis
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, Louisiana
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Minimizing the cancer-promotional activity of cox-2 as a central strategy in cancer prevention. Med Hypotheses 2012; 78:45-57. [DOI: 10.1016/j.mehy.2011.09.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Accepted: 09/19/2011] [Indexed: 02/06/2023]
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Abstract
The epithelial sodium channel (ENaC) is a heteromeric channel composed of three similar but distinct subunits, α, β and γ. This channel is an end-effector in the rennin-angiotensin-aldosterone system and resides in the apical plasma membrane of the renal cortical collecting ducts, where reabsorption of Na(+) through ENaC is the final renal adjustment step for Na(+) balance. Because of its regulation and function, the ENaC plays a critical role in modulating the homeostasis of Na(+) and thus chronic blood pressure. The development of most forms of hypertension requires an increase in Na(+) and water retention. The role of ENaC in developing high blood pressure is exemplified in the gain-of-function mutations in ENaC that cause Liddle's syndrome, a severe but rare form of inheritable hypertension. The evidence obtained from studies using animal models and in human patients indicates that improper Na(+) retention by the kidney elevates blood pressure and induces salt-sensitive hypertension.
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Bailey MA, Craigie E, Livingstone DEW, Kotelevtsev YV, Al-Dujaili EAS, Kenyon CJ, Mullins JJ. Hsd11b2 haploinsufficiency in mice causes salt sensitivity of blood pressure. Hypertension 2011; 57:515-520. [PMID: 21282561 DOI: 10.1161/hypertensionaha.110.163782] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Salt sensitivity of blood pressure is an independent risk factor for cardiovascular morbidity. Mechanistically, abnormal mineralocorticoid action and subclinical renal impairment may blunt the natriuretic response to high sodium intake, causing blood pressure to rise. 11β-Hydroxysteroid dehydrogenase type 2 (11βHSD2) controls ligand access to the mineralocorticoid receptor, and ablation of the enzyme causes severe hypertension. Polymorphisms in HSD11B2 are associated with salt sensitivity of blood pressure in normotensives. In this study, we used mice heterozygote for a null mutation in Hsd11b2 (Hsd11b2(+/-)) to define the mechanisms linking reduced enzyme activity to salt sensitivity of blood pressure. A high-sodium diet caused a rapid and sustained increase in blood pressure in Hsd11b2(+/-) mice but not in wild-type littermates. During the adaptation to high-sodium diet, heterozygotes displayed impaired sodium excretion, a transient positive sodium balance, and hypokalemia. After 21 days of high-sodium feeding, Hsd11b2(+/-) mice had an increased heart weight. Mineralocorticoid receptor antagonism partially prevented the increase in heart weight but not the increase in blood pressure. Glucocorticoid receptor antagonism prevented the rise in blood pressure. In Hsd11b2(+/-) mice, high-sodium feeding caused suppression of aldosterone and a moderate but sustained increase in corticosterone. This study demonstrates an inverse relationship among 11βHSD2 activity, heart weight, and blood pressure in a clinically important context. Reduced activity causes salt sensitivity of blood pressure, but this does not reflect illicit activation of mineralocorticoid receptors by glucocorticoids. Instead, we have identified a novel interaction among 11βHSD2, dietary salt, and circulating glucocorticoids.
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Affiliation(s)
- Matthew A Bailey
- British Heart Foundation/University Centre for Cardiovascular Science, The University of Edinburgh, Edinburgh, Scotland, UK
| | - Eilidh Craigie
- British Heart Foundation/University Centre for Cardiovascular Science, The University of Edinburgh, Edinburgh, Scotland, UK
| | - Dawn E W Livingstone
- British Heart Foundation/University Centre for Cardiovascular Science, The University of Edinburgh, Edinburgh, Scotland, UK
| | - Yuri V Kotelevtsev
- British Heart Foundation/University Centre for Cardiovascular Science, The University of Edinburgh, Edinburgh, Scotland, UK.,Stem Cell Genome Modification Laboratory, Puschino State University, Russia
| | - Emad A S Al-Dujaili
- Dietetics, Nutrition and Biological Sciences Research, Queen Margaret University, Edinburgh, Scotland, UK
| | - Christopher J Kenyon
- British Heart Foundation/University Centre for Cardiovascular Science, The University of Edinburgh, Edinburgh, Scotland, UK
| | - John J Mullins
- British Heart Foundation/University Centre for Cardiovascular Science, The University of Edinburgh, Edinburgh, Scotland, UK
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Enhanced pressor response to acute Ang II infusion in mice lacking membrane-associated prostaglandin E2 synthase-1. Acta Pharmacol Sin 2010; 31:1284-92. [PMID: 20871624 DOI: 10.1038/aps.2010.99] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
AIM To examine the contribution of vascular membrane-associated prostaglandin E2 synthase-1 (mPGES-1) to acute blood pressure homeostasis. METHODS Angiotensin II (AngII, 75 pmol·kg⁻¹·min⁻¹) was continuously infused via the jugular vein into wild-type and mPGES-1(-/-) mice for 30 min, and blood pressure was measured by carotid arterial catheterization. RT-PCR and immunohistochemistry were performed to detect the expression and localization of mPGES-1 in the mouse arterial vessels. Mesenteric arteries were dissected from mice of both genotypes to study vessel tension and measure vascular PGE2 levels. RESULTS Wild-type and mPGES-1(-/-) mice showed similar blood pressure levels at baseline, and the acute intravenous infusion of AngII caused a greater increase in mean arterial pressure in the mPGES-1(-/-) group, with a similar diuretic and natriuretic response in both groups. mPGES-1 was constitutively expressed in the aortic and mesenteric arteries and vascular smooth muscle cells of wild-type mice. Strong staining was detected in the smooth muscle layer of arterial vessels. Ex vivo treatment of mesenteric arteries with AngII produced more vasodilatory PGE2 in wild-type than in mPGES-1(-/-) mice. In vitro tension assays further revealed that the mesenteric arteries of mPGES-1(-/-) mice exhibited a greater vasopressor response to AngII than those arteries of wild-type mice. CONCLUSION Vascular mPGES-1 acts as an important tonic vasodilator, contributing to acute blood pressure regulation.
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Herrera MD, Mingorance C, Rodríguez-Rodríguez R, Alvarez de Sotomayor M. Endothelial dysfunction and aging: an update. Ageing Res Rev 2010; 9:142-52. [PMID: 19619671 DOI: 10.1016/j.arr.2009.07.002] [Citation(s) in RCA: 208] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Revised: 07/09/2009] [Accepted: 07/10/2009] [Indexed: 12/19/2022]
Abstract
Aging is an important risk factor for the development of many cardiovascular diseases as atherosclerosis and hypertension with a common underlying circumstance: the progressive decline of endothelial function. Vascular endothelial dysfunction occurs during the human aging process and is accompanied by deterioration in the balance between vasodilator and vasoconstriction substances produced by the endothelium. This imbalance is mainly characterized by a progressive reduction of the bioavailability of nitric oxide (NO) and an increase in the production of cyclooxygenase (COX)-derived vasoconstrictor factors. Both circumstances are in turn related to an increased production of reactive oxygen and nitrogen species. The aim of this review is to describe the pathophysiological mechanisms involved in the endothelial function declination that accompanies the multifactorial aging process, including alterations related to oxidative stress and pro-inflammatory cytokines, senescence of endothelial cells and genetic factors.
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Affiliation(s)
- María Dolores Herrera
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, C/Profesor García González 2, 41012 Seville, Spain.
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Al-Solaiman Y, Jesri A, Zhao Y, Morrow JD, Egan BM. Low-Sodium DASH reduces oxidative stress and improves vascular function in salt-sensitive humans. J Hum Hypertens 2009; 23:826-35. [PMID: 19404315 PMCID: PMC2783838 DOI: 10.1038/jhh.2009.32] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2009] [Revised: 02/24/2009] [Accepted: 02/25/2009] [Indexed: 12/15/2022]
Abstract
Salt induces oxidative stress in salt-sensitive (SS) animals and man. It is not known whether in SS subjects the low-sodium dietary approaches to stop hypertension (LS-DASH) reduces oxidative stress more than DASH, which is high in antioxidants. To assess the effects of DASH and LS-DASH on oxidative stress, 19 volunteers were studied after 3 weeks of a standardized usual low fruits and vegetables diet (ULFV), followed by 3 weeks on DASH (both diets approximately 120 mmol Na(+) per day), then 3 weeks on LS-DASH (60 mmol Na(+) per day). SS was defined as systolic blood pressure >or=5 mm Hg lower on LS-DASH than DASH. In SS subjects (N=9), systolic blood pressure was lower on LS-DASH (111.0+/-2.0 mm Hg) than DASH (118.0+/-2.2, P<0.01) and ULFV (122.3+/-2.7, P=0.002). In salt-resistant (SR) volunteers (N=10), systolic blood pressure was lower on DASH (113.0+/-1.6) than ULFV (119.0+/-1.8, P<0.05) but not LS-DASH (115.7+/-1.8). Urine F2-isoprostanes, a marker of oxidative stress, were lower in SS subjects on LS-DASH (1.69+/-0.24) than ULFV (3.09+/-0.50, P<0.05) and marginally lower than DASH (2.46+/-0.44, P<0.20). F2-isoprostanes were not different among the three diets in SR volunteers (2.18+/-0.29, 2.06+/-0.29, 2.27+/-0.53, respectively). Aortic augmentation index, a measure of vascular stiffness, was lower in SS subjects on LS-DASH than either DASH or ULFV, and lower on DASH than ULFV in SR volunteers. In SS but not SR subjects, LS-DASH is associated with lower values for F2-isoprostanes and the aortic augmentation index. The results suggest that LS-DASH decreases oxidative stress, improves vascular function and lowers blood pressure in SS but not SR volunteers.
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Affiliation(s)
- Y Al-Solaiman
- Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
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Deeb RS, Lamon BD, Hajjar DP. Silent Partner in Blood Vessel Homeostasis? Pervasive Role of Nitric Oxide in Vascular Disease. Curr Hypertens Rev 2009; 5:273-282. [PMID: 20368751 PMCID: PMC2847292 DOI: 10.2174/157340209789587726] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The endothelium generates powerful mediators that regulate blood flow, temper inflammation and maintain a homeostatic environment to prevent both the initiation and progression of vascular disease. Nitric oxide (NO) is arguably the single most influential molecule in terms of dictating blood vessel homeostasis. In addition to direct effects associated with altered NO production (e.g. vasoconstriction, excessive inflammation, endothelial dysfunction), NO is a critical modulator of vaso-relevant pathways including cyclooxygenase (COX)-derived prostaglandin production and angiotensin II generation by the renin-angiotensin system. Furthermore, NO may influence the selectivity of COX-2 inhibitors and ultimately contribute to controversies associated with the use of these drugs. Consistent with a central role for NO in vascular disease, disruptions in the production and bioavailability of NO have been linked to hypertension, diabetes, hypercholesterolemia, obesity, aging, and smoking. The ability of the vessel wall to control disease-associated oxidative stress may be the most critical determinant in maintaining homeostatic levels of NO and subsequently the prospect of stroke, myocardial infarction and other CV abnormalities. To this end, investigation of mechanisms that alter the balance of protective mediators, including pathways that are indirectly modified by NO, is critical to the development of effective therapy in the treatment of CV disease.
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Affiliation(s)
- Ruba S. Deeb
- Department of Pathology and Laboratory Medicine, Center of Vascular Biology, Weill Cornell, Medical College of Cornell University, 1300 York Avenue, New York, New York 10065
| | - Brian D. Lamon
- Department of Pathology and Laboratory Medicine, Center of Vascular Biology, Weill Cornell, Medical College of Cornell University, 1300 York Avenue, New York, New York 10065
| | - David P. Hajjar
- Department of Pathology and Laboratory Medicine, Center of Vascular Biology, Weill Cornell, Medical College of Cornell University, 1300 York Avenue, New York, New York 10065
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Losartan and tempol treatments normalize the increased response to hydrogen peroxide in resistance arteries from hypertensive rats. J Hypertens 2009; 27:1814-22. [DOI: 10.1097/hjh.0b013e32832d23e6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Garrido AM, Griendling KK. NADPH oxidases and angiotensin II receptor signaling. Mol Cell Endocrinol 2009; 302:148-58. [PMID: 19059306 PMCID: PMC2835147 DOI: 10.1016/j.mce.2008.11.003] [Citation(s) in RCA: 287] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2008] [Revised: 10/17/2008] [Accepted: 11/03/2008] [Indexed: 02/07/2023]
Abstract
Over the last decade many studies have demonstrated the importance of reactive oxygen species (ROS) production by NADPH oxidases in angiotensin II (Ang II) signaling, as well as a role for ROS in the development of different diseases in which Ang II is a central component. In this review, we summarize the mechanism of activation of NADPH oxidases by Ang II and describe the molecular targets of ROS in Ang II signaling in the vasculature, kidney and brain. We also discuss the effects of genetic manipulation of NADPH oxidase function on the physiology and pathophysiology of the renin-angiotensin system.
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Doller A, Gauer S, Sobkowiak E, Geiger H, Pfeilschifter J, Eberhardt W. Angiotensin II induces renal plasminogen activator inhibitor-1 and cyclooxygenase-2 expression post-transcriptionally via activation of the mRNA-stabilizing factor human-antigen R. THE AMERICAN JOURNAL OF PATHOLOGY 2009; 174:1252-63. [PMID: 19246637 DOI: 10.2353/ajpath.2009.080652] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Angiotensin (Ang) II-induced fibrosis of the kidney is characterized by the enhanced expression of profibrotic and proinflammatory genes, including the serine protease inhibitor plasminogen activator inhibitor-1 (PAI-1) and cyclooxygenase-2 (COX-2). In addition to transcriptional regulation, both genes are subject to post-transcriptional control by AU-rich destabilizing elements that reside within the 3' untranslated region of the mRNA. We demonstrated that the continuous infusion of AngII in rats induced fibrosis concomitant with a significant increase in glomerular PAI-1 and COX-2 expression levels. Using RNA pull-down assays and electromobility shift assays, we demonstrated the increased binding of the ubiquitous RNA-binding protein human-antigen R (HuR) to the mRNAs of both PAI-1 and COX-2 in the cytoplasmic fractions of renal homogenates from AngII-treated rats. Actinomycin D experiments in rat mesangial cells revealed that AngII stabilizes both mRNAs via HuR as proven by small interfering RNA. Mechanistically, AngII promotes an increase in nucleo-cytoplasmic HuR shuttling, which was blocked by the PKC inhibitor rottlerin and the type-I AngII (AT(1)) receptor antagonist valsartan but was unaffected by both AT(2) receptor antagonists PD123319 and CGP42112. Co-immunoprecipitation revealed that AngII treatment caused an increase in nuclear PKC-delta concomitant with binding to nuclear HuR both in vitro and in vivo. The post-transcriptional regulation of PAI-1 and COX-2 by PKC-delta-dependent HuR shuttling may contribute to the pathogenesis of hypertensive nephrosclerosis triggered by AngII.
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Affiliation(s)
- Anke Doller
- Pharmazentrum Frankfurt/ZAFES, Klinikum der Johann Wolfgang Goethe-Universität Frankfurt am Main, Theodor-Stern-Kai 7, D-60590 Frankfurt am Main, Germany
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Wilcox CS, Pearlman A. Chemistry and antihypertensive effects of tempol and other nitroxides. Pharmacol Rev 2009; 60:418-69. [PMID: 19112152 DOI: 10.1124/pr.108.000240] [Citation(s) in RCA: 290] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Nitroxides can undergo one- or two-electron reduction reactions to hydroxylamines or oxammonium cations, respectively, which themselves are interconvertible, thereby providing redox metabolic actions. 4-Hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl (tempol) is the most extensively studied nitroxide. It is a cell membrane-permeable amphilite that dismutates superoxide catalytically, facilitates hydrogen peroxide metabolism by catalase-like actions, and limits formation of toxic hydroxyl radicals produced by Fenton reactions. It is broadly effective in detoxifying these reactive oxygen species in cell and animal studies. When administered intravenously to hypertensive rodent models, tempol caused rapid and reversible dose-dependent reductions in blood pressure in 22 of 26 studies. This was accompanied by vasodilation, increased nitric oxide activity, reduced sympathetic nervous system activity at central and peripheral sites, and enhanced potassium channel conductance in blood vessels and neurons. When administered orally or by infusion over days or weeks to hypertensive rodent models, it reduced blood pressure in 59 of 68 studies. This was accompanied by correction of salt sensitivity and endothelial dysfunction and reduced agonist-evoked oxidative stress and contractility of blood vessels, reduced renal vascular resistance, and increased renal tissue oxygen tension. Thus, tempol is broadly effective in reducing blood pressure, whether given by acute intravenous injection or by prolonged administration, in a wide range of rodent models of hypertension.
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Affiliation(s)
- Christopher S Wilcox
- Division of Nephrology and Hypertension, Kidney and Vascular Disorder Center, Georgetown University, Washington, DC 20007, USA.
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p38 MAPK contributes to angiotensin II-induced COX-2 expression in aortic fibroblasts from normotensive and hypertensive rats. J Hypertens 2009; 27:142-54. [PMID: 19145780 DOI: 10.1097/hjh.0b013e328317a730] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To investigate the effect of angiotensin II on cyclooxygenase-2 (COX-2) expression in aortic adventitial fibroblasts from normotensive [Wistar-Kyoto (WKY)] rats and spontaneously hypertensive rats (SHRs). METHODS Protein expression was determined by western blot, mRNA levels by real-time PCR, transcriptional activity by luciferase assays, superoxide anion (O2*-) production by dihydroethidine fluorescence and prostaglandin E2 by enzyme immunoassay. RESULTS Angiotensin II (0.1 micromol/l, 0.5-6 h) time dependently induced COX-2 protein expression, this effect being transient in fibroblasts from WKY rats and maintained over time in SHRs. Angiotensin II effect was abolished by valsartan (1 micromol/l), an angiotensin II type 1 receptor antagonist. Angiotensin II-induced prostaglandin E2 production was reduced by valsartan and the COX-2 inhibitor NS398 (1 micromol/l). Angiotensin II increased O2*- production more in SHR than WKY rats. This increase was reduced by apocynin (30 micromol/l) and allopurinol (10 micromol/l), respective nicotinamide adenine dinucleotide phosphate (NADPH) and xanthine oxidase inhibitors. However, angiotensin II-induced COX-2 expression was unaffected by apocynin, allopurinol, tempol (1 mmol/l) or catalase (1000 U/ml). Angiotensin II (2-30 min) induced p38 mitogen-activated protein kinase (MAPK) phosphorylation, transiently in WKY rats but sustained in SHRs. The p38 inhibitor SB203580 (10 micromol/l) reduced angiotensin II-induced COX-2 protein and mRNA levels. The angiotensin II effect was not prevented by inhibition of mRNA synthesis, and angiotensin II was unable to modulate COX-2 transcriptional activity. CONCLUSIONS Angiotensin II increases COX-2 expression in aortic fibroblasts through mechanisms including p38 MAPK pathway, independent of reactive oxygen species production and nonmediated by COX-2 transcriptional activity modulation. The sustained angiotensin-induced p38 MAPK activation in SHR cells might be related to the maintained COX-2 expression in this strain.
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Mecanismos implicados en la disfunción endotelial asociada al envejecimiento. Med Clin (Barc) 2009; 132:62-9. [DOI: 10.1016/j.medcli.2008.09.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Accepted: 09/17/2008] [Indexed: 11/21/2022]
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Welch WJ. Angiotensin II-dependent superoxide: effects on hypertension and vascular dysfunction. Hypertension 2008; 52:51-6. [PMID: 18474831 DOI: 10.1161/hypertensionaha.107.090472] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- William J Welch
- Department of Medicine, Georgetown University, 4000 Reservoir Rd, Building D-395, Washington, DC 20007, USA.
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