1
|
Lee WE, Genetzakis E, Figtree GA. Novel Strategies in the Early Detection and Treatment of Endothelial Cell-Specific Mitochondrial Dysfunction in Coronary Artery Disease. Antioxidants (Basel) 2023; 12:1359. [PMID: 37507899 PMCID: PMC10376062 DOI: 10.3390/antiox12071359] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/26/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
Although elevated cholesterol and other recognised cardiovascular risk factors are important in the development of coronary artery disease (CAD) and heart attack, the susceptibility of humans to this fatal process is distinct from other animals. Mitochondrial dysfunction of cells in the arterial wall, particularly the endothelium, has been strongly implicated in the pathogenesis of CAD. In this manuscript, we review the established evidence and mechanisms in detail and explore the potential opportunities arising from analysing mitochondrial function in patient-derived cells such as endothelial colony-forming cells easily cultured from venous blood. We discuss how emerging technology and knowledge may allow us to measure mitochondrial dysfunction as a potential biomarker for diagnosis and risk management. We also discuss the "pros and cons" of animal models of atherosclerosis, and how patient-derived cell models may provide opportunities to develop novel therapies relevant for humans. Finally, we review several targets that potentially alleviate mitochondrial dysfunction working both via direct and indirect mechanisms and evaluate the effect of several classes of compounds in the cardiovascular context.
Collapse
Affiliation(s)
- Weiqian E. Lee
- Kolling Institute, University of Sydney, Sydney, NSW 2006, Australia; (W.E.L.); (E.G.)
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2006, Australia
| | - Elijah Genetzakis
- Kolling Institute, University of Sydney, Sydney, NSW 2006, Australia; (W.E.L.); (E.G.)
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2006, Australia
| | - Gemma A. Figtree
- Kolling Institute, University of Sydney, Sydney, NSW 2006, Australia; (W.E.L.); (E.G.)
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2006, Australia
- Department of Cardiology, Royal North Shore Hospital, Northern Sydney Local Health District, Sydney, NSW 2065, Australia
| |
Collapse
|
2
|
de Oliveira K, Severo J, da Silva A, dos Santos B, Mendes P, Sabino J, Filho A, Correia-de-Sá P, dos Santos A, da Silva M. P2X7 receptor antagonist improves gastrointestinal disorders in spontaneously hypertensive rats. Braz J Med Biol Res 2023; 56:e12569. [PMID: 36856255 PMCID: PMC9974071 DOI: 10.1590/1414-431x2023e12569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 01/05/2023] [Indexed: 03/02/2023] Open
Abstract
The purinergic system participates in the control of blood pressure. Hypertension promotes the occurrence of gastrointestinal disorders such as intestinal inflammation and gastric emptying delay. This study aimed i) to investigate the participation of the P2X7 receptor blocker Brilliant Blue G (BBG) on gastric emptying of solids and changes in oxidative stress in the gastric fundus, duodenum, and colon of spontaneously hypertensive rats (SHR) and ii) to study the putative relationship of this effect with the renin-angiotensin system. Rats were divided into five groups: Control, SHR, SHR+BBG, SHR+BBG+ATP, and SHR+BBG+ANG II. In the gastrointestinal tract, we assessed gastric emptying (GE) and oxidative stress markers (NOx, MPO, GSH, SOD). We observed a decrease in the GE rate (P<0.05) in SHR vs control rats (21.8±2.0% vs 42.8±3.5%). The decrease in GE was returned (P<0.05) to control levels by BBG in SHR rats (21.8±2.0% vs 41.6±3.2%). Co-administration of ATP or ANG II together with BBG bypassed the effect of the P2X7 antagonist on GE in SHR (P<0.05) (21.9±5.0% vs 25.6±3.0% vs 41.6±3.2%). The MPO activity increased (P<0.05) in the gastric fundus of SHR compared to control rats (6.12±2.26 vs 0.077±0.02 UMPO/mg tissue); this effect was prevented (P<0.05) by BBG (0.55±0.15 vs 6.12±2.26 UMPO/mg tissue). Data demonstrated that blockage of P2X7 receptors with BBG can improve the GE delay and oxidative stress biomarkers in SHR animals. This preventive effect of BBG on GE delay was abrogated by ANG II and ATP, thus prompting crosstalk between renin-angiotensin and the purinergic signaling systems underlying this phenomenon.
Collapse
Affiliation(s)
- K.B.V. de Oliveira
- Programa de Pós-Graduação em Farmacologia, Universidade Federal do Piauí, Teresina, PI, Brasil,Departamento de Educação Física, Laboratório de Exercício e Trato Gastrointestinal, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - J.S. Severo
- Programa de Pós-Graduação em Alimentação e Nutrição, Universidade Federal do Piauí, Teresina, PI, Brasil,Departamento de Educação Física, Laboratório de Exercício e Trato Gastrointestinal, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - A.C.A. da Silva
- Programa de Pós-Graduação em Farmacologia, Universidade Federal do Piauí, Teresina, PI, Brasil,Departamento de Educação Física, Laboratório de Exercício e Trato Gastrointestinal, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - B.L.B. dos Santos
- Departamento de Educação Física, Laboratório de Exercício e Trato Gastrointestinal, Universidade Federal do Piauí, Teresina, PI, Brasil,Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - P.H.M. Mendes
- Departamento de Educação Física, Laboratório de Exercício e Trato Gastrointestinal, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - J.P.J. Sabino
- Departamento de Biofísica e Fisiologia, Universidade Federal do Piauí, Teresina, PI, Brasil,Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Piauí, Teresina, PI, Brasil
| | - A.L.M.M. Filho
- Centro de Ciências da Saúde, Universidade Estadual do Piauí, Teresina, PI, Brasil
| | - P. Correia-de-Sá
- Departamento de Imuno-Fisiologia e Farmacologia, Laboratório de Farmacologia e Neurobiologia, Centro de Descoberta de Fármacos e Medicamentos Inovadores, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - A.A. dos Santos
- Departamento de Fisiologia e Farmacologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil
| | - M.T.B. da Silva
- Programa de Pós-Graduação em Farmacologia, Universidade Federal do Piauí, Teresina, PI, Brasil,Programa de Pós-Graduação em Alimentação e Nutrição, Universidade Federal do Piauí, Teresina, PI, Brasil,Departamento de Educação Física, Laboratório de Exercício e Trato Gastrointestinal, Universidade Federal do Piauí, Teresina, PI, Brasil,Departamento de Imuno-Fisiologia e Farmacologia, Laboratório de Fisiologia, Centro de Descoberta de Fármacos e Medicamentos Inovadores, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| |
Collapse
|
3
|
Zhou J, Zhou Z, Liu X, Yin HY, Tang Y, Cao X. P2X7 Receptor-Mediated Inflammation in Cardiovascular Disease. Front Pharmacol 2021; 12:654425. [PMID: 33995071 PMCID: PMC8117356 DOI: 10.3389/fphar.2021.654425] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 04/09/2021] [Indexed: 02/05/2023] Open
Abstract
Purinergic P2X7 receptor, a nonselective cation channel, is highly expressed in immune cells as well as cardiac smooth muscle cells and endothelial cells. Its activation exhibits to mediate nucleotide-binding domain (NOD)-like receptor protein 3 (NLRP3) inflammasome activation, resulting in the release of interleukin-1 beta (IL-1β) and interleukin-18 (IL-18), and pyroptosis, thus triggering inflammatory response. These pathological mechanisms lead to the deterioration of various cardiovascular diseases, including atherosclerosis, arrhythmia, myocardial infarction, pulmonary vascular remodeling, and cardiac fibrosis. All these worsening cardiac phenotypes are proven to be attenuated after the P2X7 receptor inhibition in experimental studies. The present review aimed to summarize key aspects of P2X7 receptor–mediated inflammation and pyroptosis in cardiovascular diseases. The main focus is on the evidence addressing the involvement of the P2X7 receptor in the inflammatory responses to the occurrence and development of cardiovascular disease and therapeutic interventions.
Collapse
Affiliation(s)
- Junteng Zhou
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China
| | - Zhichao Zhou
- Division of Cardiology, Department of Medicine, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Xiaojing Liu
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China.,Laboratory of Cardiovascular Diseases, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| | - Hai-Yan Yin
- School of Acupuncture and Tuina and International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu, China
| | - Yong Tang
- School of Acupuncture and Tuina and International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu, China
| | - Xin Cao
- School of Acupuncture and Tuina and International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu, China
| |
Collapse
|
4
|
Sievers LK, Eckardt KU. Molecular Mechanisms of Kidney Injury and Repair in Arterial Hypertension. Int J Mol Sci 2019; 20:E2138. [PMID: 31052201 DOI: 10.3390/ijms20092138] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 04/25/2019] [Accepted: 04/28/2019] [Indexed: 02/06/2023] Open
Abstract
The global burden of chronic kidney disease is rising. The etiologies, heterogeneous, and arterial hypertension, are key factors contributing to the development and progression of chronic kidney disease. Arterial hypertension is induced and maintained by a complex network of systemic signaling pathways, such as the hormonal axis of the renin-angiotensin-aldosterone system, hemodynamic alterations affecting blood flow, oxygen supply, and the immune system. This review summarizes the clinical and histopathological features of hypertensive kidney injury and focusses on the interplay of distinct systemic signaling pathways, which drive hypertensive kidney injury in distinct cell types of the kidney. There are several parallels between hypertension-induced molecular signaling cascades in the renal epithelial, endothelial, interstitial, and immune cells. Angiotensin II signaling via the AT1R, hypoxia induced HIFα activation and mechanotransduction are closely interacting and further triggering the adaptions of metabolism, cytoskeletal rearrangement, and profibrotic TGF signaling. The interplay of these, and other cellular pathways, is crucial to balancing the injury and repair of the kidneys and determines the progression of hypertensive kidney disease.
Collapse
|
5
|
Gong C, Liu X, Ding L, Liu Y, Li T, Wang S, Zhao J, Rao S, Xiong C, Yang Y, Liu C, Liang S, Xu H. A non-synonymous polymorphism in purinergic P2X7 receptor gene confers reduced susceptibility to essential hypertension in Chinese postmenopausal women. Clin Exp Hypertens 2018; 41:558-563. [PMID: 30359160 DOI: 10.1080/10641963.2018.1523914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Chengxin Gong
- c Department of Science and Education , Chest Hospital of Jiangxi Province , Nanchang , Jiangxi , China
| | - Xingzi Liu
- d Undergraduate student of Clinical Medical College, JiangXi Medical College of Nanchang University , Nanchang , Jiangxi , China
| | - Lu Ding
- d Undergraduate student of Clinical Medical College, JiangXi Medical College of Nanchang University , Nanchang , Jiangxi , China
| | - Yuanyuan Liu
- a Department of Physiology , JiangXi Medical College of Nanchang University , Nanchang , Nanchang, Jiangxi , China.,b Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease , Nanchang , Jiangxi , China
| | - Tao Li
- d Undergraduate student of Clinical Medical College, JiangXi Medical College of Nanchang University , Nanchang , Jiangxi , China
| | - Shuo Wang
- d Undergraduate student of Clinical Medical College, JiangXi Medical College of Nanchang University , Nanchang , Jiangxi , China
| | - Jiani Zhao
- d Undergraduate student of Clinical Medical College, JiangXi Medical College of Nanchang University , Nanchang , Jiangxi , China
| | - Shenqiang Rao
- a Department of Physiology , JiangXi Medical College of Nanchang University , Nanchang , Nanchang, Jiangxi , China.,b Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease , Nanchang , Jiangxi , China
| | - Chaopeng Xiong
- e The Second Affiliated Hospital of Nanchang University , Nanchang , Jiangxi , China
| | - Yuping Yang
- f The Fourth Affiliated Hospital of Nanchang University , Nanchang , Jiangxi , China
| | - Chaxian Liu
- d Undergraduate student of Clinical Medical College, JiangXi Medical College of Nanchang University , Nanchang , Jiangxi , China
| | - Shangdong Liang
- a Department of Physiology , JiangXi Medical College of Nanchang University , Nanchang , Nanchang, Jiangxi , China.,b Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease , Nanchang , Jiangxi , China
| | - Hong Xu
- a Department of Physiology , JiangXi Medical College of Nanchang University , Nanchang , Nanchang, Jiangxi , China.,b Jiangxi Provincial Key Laboratory of Autonomic Nervous Function and Disease , Nanchang , Jiangxi , China
| |
Collapse
|
6
|
Craigie E, Menzies RI, Larsen CK, Jacquillet G, Carrel M, Wildman SS, Loffing J, Leipziger J, Shirley DG, Bailey MA, Unwin RJ. The renal and blood pressure response to low sodium diet in P2X4 receptor knockout mice. Physiol Rep 2018; 6:e13899. [PMID: 30350402 PMCID: PMC6198136 DOI: 10.14814/phy2.13899] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 09/25/2018] [Accepted: 09/27/2018] [Indexed: 01/02/2023] Open
Abstract
In the kidney, purinergic (P2) receptor-mediated ATP signaling has been shown to be an important local regulator of epithelial sodium transport. Appropriate sodium regulation is crucial for blood pressure (BP) control and disturbances in sodium balance can lead to hypo- or hypertension. Links have already been established between P2 receptor signaling and the development of hypertension, attributed mainly to vascular and/or inflammatory effects. A transgenic mouse model with deletion of the P2X4 receptor (P2X4-/- ) is known to have hypertension, which is thought to reflect endothelial dysfunction and impaired nitric oxide (NO) release. However, renal function in this model has not been characterized; moreover, studies in vitro have shown that the P2X4 receptor can regulate renal epithelial Na+ channel (ENaC) activity. Therefore, in the present study we investigated renal function and sodium handling in P2X4-/- mice, focusing on ENaC-mediated Na+ reabsorption. We confirmed an elevated BP in P2X4-/- mice compared with wild-type mice, but found that ENaC-mediated Na+ reabsorption is no different from wild-type and does not contribute to the raised BP observed in the knockout. However, when P2X4-/- mice were placed on a low sodium diet, BP normalized. Plasma aldosterone concentration tended to increase according to sodium restriction status in both genotypes; in contrast to wild-types, P2X4-/- mice did not show an increase in functional ENaC activity. Thus, although the increased BP in P2X4-/- mice has been attributed to endothelial dysfunction and impaired NO release, there is also a sodium-sensitive component.
Collapse
Affiliation(s)
- Eilidh Craigie
- Centre for NephrologyUniversity College London Medical SchoolLondonUnited Kingdom
- Institue for AnatomyUniversity of ZürichZürichSwitzerland
| | - Robert I. Menzies
- British Heart Foundation Centre for Cardiovascular ScienceUniversity of EdinburghEdinburghUnited Kingdom
| | - Casper K. Larsen
- Department of Biomedicine, PhysiologyAarhus UniversityAarhus CDenmark
| | - Grégory Jacquillet
- Centre for NephrologyUniversity College London Medical SchoolLondonUnited Kingdom
| | - Monique Carrel
- Institue for AnatomyUniversity of ZürichZürichSwitzerland
| | - Scott S. Wildman
- Urinary System Physiology UnitMedway School of PharmacyUniversity of KentKentUnited Kingdom
| | | | - Jens Leipziger
- Department of Biomedicine, PhysiologyAarhus UniversityAarhus CDenmark
| | - David G. Shirley
- Centre for NephrologyUniversity College London Medical SchoolLondonUnited Kingdom
| | - Matthew A. Bailey
- British Heart Foundation Centre for Cardiovascular ScienceUniversity of EdinburghEdinburghUnited Kingdom
| | - Robert J. Unwin
- Centre for NephrologyUniversity College London Medical SchoolLondonUnited Kingdom
- CVRM iMEDAstraZeneca GothenburgGothenburgSweden
| |
Collapse
|
7
|
Abstract
Extracellular ATP interacts with purinergic type 2 (P2) receptors and elicits many crucial biological functions. Extracellular ATP is sequentially hydrolyzed to ADP and AMP by the actions of defined nucleotidases, such as CD39, and AMP is converted to adenosine, largely by CD73, an ecto-5'-nucleotidase. Extracellular adenosine interacts with P1 receptors and often opposes the effects of P2 receptor activation. The balance between extracellular ATP and adenosine in the blood and extracellular fluid is regulated chiefly by the activities of CD39 and CD73, which constitute the CD39-adenosinergic axis. In recent years, several studies have shown this axis to play critical roles in transport of water/sodium, tubuloglomerular feedback, renin secretion, ischemia reperfusion injury, renal fibrosis, hypertension, diabetic nephropathy, transplantation, inflammation, and macrophage transformation. Important developments include global and targeted gene knockout and/or transgenic mouse models of CD39 or CD73, biological or small molecule inhibitors, and soluble engineered ectonucleotidases to directly impact the CD39-adenosinergic axis. This review presents a comprehensive picture of the multiple roles of CD39-adenosinergic axis in renal physiology, pathophysiology, and therapeutics. Scientific advances and greater understanding of the role of this axis in the kidney, in both health and illness, will direct development of innovative therapies for renal diseases.
Collapse
Affiliation(s)
- Bellamkonda K. Kishore
- Departments of Internal Medicine and Nutrition & Integrative Physiology, and Center on Aging, University of Utah Health, Salt Lake City, UT USA
- Nephrology Research, VA Salt Lake City Health Care System, 500 Foothill Drive (151M), Salt Lake City, UT 84148 USA
| | - Simon C. Robson
- Division of Gastroenterology/Hepatology and Transplant Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215 USA
| | - Karen M. Dwyer
- School of Medicine, Faculty of Health, Deakin University, Geelong, VIC 3220 Australia
| |
Collapse
|
8
|
Savio LEB, de Andrade Mello P, da Silva CG, Coutinho-Silva R. The P2X7 Receptor in Inflammatory Diseases: Angel or Demon? Front Pharmacol 2018; 9:52. [PMID: 29467654 PMCID: PMC5808178 DOI: 10.3389/fphar.2018.00052] [Citation(s) in RCA: 276] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 01/15/2018] [Indexed: 12/13/2022] Open
Abstract
Under physiological conditions, adenosine triphosphate (ATP) is present at low levels in the extracellular milieu, being massively released by stressed or dying cells. Once outside the cells, ATP and related nucleotides/nucleoside generated by ectonucleotidases mediate a high evolutionary conserved signaling system: the purinergic signaling, which is involved in a variety of pathological conditions, including inflammatory diseases. Extracellular ATP has been considered an endogenous adjuvant that can initiate inflammation by acting as a danger signal through the activation of purinergic type 2 receptors-P2 receptors (P2Y G-protein coupled receptors and P2X ligand-gated ion channels). Among the P2 receptors, the P2X7 receptor is the most extensively studied from an immunological perspective, being involved in both innate and adaptive immune responses. P2X7 receptor activation induces large-scale ATP release via its intrinsic ability to form a membrane pore or in association with pannexin hemichannels, boosting purinergic signaling. ATP acting via P2X7 receptor is the second signal to the inflammasome activation, inducing both maturation and release of pro-inflammatory cytokines, such as IL-1β and IL-18, and the production of reactive nitrogen and oxygen species. Furthermore, the P2X7 receptor is involved in caspases activation, as well as in apoptosis induction. During adaptive immune response, P2X7 receptor modulates the balance between the generation of T helper type 17 (Th17) and T regulatory (Treg) lymphocytes. Therefore, this receptor is involved in several inflammatory pathological conditions. In infectious diseases and cancer, P2X7 receptor can have different and contrasting effects, being an angel or a demon depending on its level of activation, cell studied, type of pathogen, and severity of infection. In neuroinflammatory and neurodegenerative diseases, P2X7 upregulation and function appears to contribute to disease progression. In this review, we deeply discuss P2X7 receptor dual function and its pharmacological modulation in the context of different pathologies, and we also highlight the P2X7 receptor as a potential target to treat inflammatory related diseases.
Collapse
Affiliation(s)
- Luiz E B Savio
- Laboratory of Immunophysiology, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paola de Andrade Mello
- Division of Gastroenterology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Harvard University, Boston, MA, United States
| | - Cleide Gonçalves da Silva
- Division of Vascular Surgery, Department of Surgery, Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Robson Coutinho-Silva
- Laboratory of Immunophysiology, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| |
Collapse
|
9
|
Affiliation(s)
- A. Westphal
- Klinik für Innere Medizin III; AG Experimentelle Nephrologie; Universitätsklinikum Jena; Jena Germany
| | - S. Reuter
- Klinik für Innere Medizin III; AG Experimentelle Nephrologie; Universitätsklinikum Jena; Jena Germany
| | - R. Mrowka
- Klinik für Innere Medizin III; AG Experimentelle Nephrologie; Universitätsklinikum Jena; Jena Germany
| |
Collapse
|
10
|
Palygin O, Evans LC, Cowley AW, Staruschenko A. Acute In Vivo Analysis of ATP Release in Rat Kidneys in Response to Changes of Renal Perfusion Pressure. J Am Heart Assoc 2017; 6:JAHA.117.006658. [PMID: 28899893 PMCID: PMC5634305 DOI: 10.1161/jaha.117.006658] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background ATP and derivatives are recognized to be essential agents of paracrine signaling. It was reported that ATP is an important regulator of the pressure‐natriuresis mechanism. Information on the sources of ATP, the mechanisms of its release, and its relationship to blood pressure has been limited by the inability to precisely measure dynamic changes in intrarenal ATP levels in vivo. Methods and Results Newly developed amperometric biosensors were used to assess alterations in cortical ATP concentrations in response to changes in renal perfusion pressure (RPP) in anesthetized Sprague–Dawley rats. RPP was monitored via the carotid artery; ligations around the celiac/superior mesenteric arteries and the distal aorta were used for manipulation of RPP. Biosensors were acutely implanted in the renal cortex for assessment of ATP. Rise of RPP activated diuresis/natriuresis processes, which were associated with elevated ATP. The increases in cortical ATP concentrations were in the physiological range (1–3 μmol/L) and would be capable of activating most of the purinergic receptors. There was a linear correlation with every 1‐mm Hg rise in RPP resulting in a 70‐nmol/L increase in ATP. Furthermore, this elevation of RPP was accompanied by a 2.5‐fold increase in urinary H2O2. Conclusions Changes in RPP directly correlate with renal sodium excretion and the elevation of cortical ATP. Given the known effects of ATP on regulation of glomerular filtration and tubular transport, the data support a role for ATP release in the rapid natriuretic responses to acute increases in RPP.
Collapse
Affiliation(s)
- Oleg Palygin
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI
| | - Louise C Evans
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI
| | - Allen W Cowley
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI
| | | |
Collapse
|
11
|
Affiliation(s)
- P. B. Persson
- Institute of Vegetative Physiology; Charité-Universitaetsmedizin Berlin; Berlin Germany
| | | |
Collapse
|
12
|
Affiliation(s)
- Pontus B. Persson
- Institute of Vegetative Physiology; Charité-Universitaetsmedizin Berlin; Berlin Germany
| |
Collapse
|
13
|
Guan Z, Singletary ST, Cha H, Van Beusecum JP, Cook AK, Pollock JS, Pollock DM, Inscho EW. Pentosan polysulfate preserves renal microvascular P2X1 receptor reactivity and autoregulatory behavior in DOCA-salt hypertensive rats. Am J Physiol Renal Physiol 2015; 310:F456-65. [PMID: 26697978 DOI: 10.1152/ajprenal.00110.2015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 12/21/2015] [Indexed: 01/06/2023] Open
Abstract
Inflammation contributes to ANG II-associated impairment of renal autoregulation and microvascular P2X1 receptor signaling, but its role in renal autoregulation in mineralocorticoid-induced hypertension is unknown. Autoregulatory behavior was assessed using the blood-perfused juxtamedullary nephron preparation. Hypertension was induced in uninephrectomized control rats (UNx) by subcutaneous implantation of a DOCA pellet plus administration of 1% NaCl in the drinking water (DOCA-salt) for 3 wk. DOCA-salt rats developed hypertension that was unaltered by anti-inflammatory treatment with pentosan polysulfate (DOCA-salt+PPS) but was suppressed with "triple therapy" (hydrochlorothiazide, hydralazine, and reserpine; DOCA-salt+TTx). Baseline arteriolar diameters were similar across all groups. UNx rats exhibited pressure-dependent vasoconstriction with diameters declining to 69 ± 2% of control at 170 mmHg, indicating intact autoregulation. DOCA-salt treatment significantly blunted this pressure-mediated vasoconstriction. Diameters remained between 91 ± 4 and 98 ± 3% of control over 65-170 mmHg, indicating impaired autoregulation. In contrast, pressure-mediated vasoconstriction was preserved in DOCA-salt+PPS and DOCA-salt+TTx rats, reaching 77 ± 7 and 75 ± 3% of control at 170 mmHg, respectively. ATP is required for autoregulation via P2X1 receptor activation. ATP- and β,γ-methylene ATP (P2X1 receptor agonist)-mediated vasoconstriction were markedly attenuated in DOCA-salt rats compared with UNx (P < 0.05), but significantly improved by PPS or TTx (P < 0.05 vs. DOCA-salt) treatment. Arteriolar responses to adenosine and UTP (P2Y2 receptor agonist) were unaffected by DOCA-salt treatment. PPS and TTx significantly reduced MCP-1 and protein excretion in DOCA-salt rats. These results support the hypothesis that hypertension triggers inflammatory cascades but anti-inflammatory treatment preserves renal autoregulation in DOCA-salt rats, most likely by normalizing renal microvascular reactivity to P2X1 receptor activation.
Collapse
Affiliation(s)
- Zhengrong Guan
- Department of Physiology, Georgia Regents University, Augusta, Georgia; Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Sean T Singletary
- Department of Physiology, Georgia Regents University, Augusta, Georgia
| | - Haword Cha
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and School of Natural Sciences, University of California, Merced, California
| | - Justin P Van Beusecum
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Anthony K Cook
- Department of Physiology, Georgia Regents University, Augusta, Georgia; Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Jennifer S Pollock
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - David M Pollock
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Edward W Inscho
- Department of Physiology, Georgia Regents University, Augusta, Georgia; Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| |
Collapse
|