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Dąbkowski K, Kreft E, Sałaga-Zaleska K, Chyła G, Kuchta A, Jankowski M. Redox regulation of hemodynamics response to diadenosine tetraphosphate an agonist of P2 receptors and renal function in diet-induced hypercholesterolemic rats. Physiol Rep 2021; 9:e14888. [PMID: 34110719 PMCID: PMC8191177 DOI: 10.14814/phy2.14888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/25/2021] [Accepted: 05/06/2021] [Indexed: 11/24/2022] Open
Abstract
Hypercholesterolemia and oxidative stress may lead to disturbances in the renal microvasculature in response to vasoactive agents, including P2 receptors (P2R) agonists. We investigated the renal microvascular response to diadenosine tetraphosphate (Ap4A), an agonist of P2R, in diet‐induced hypercholesteremic rats over 28 days, supplemented in the last 10 days with tempol (2 mM) or DL‐buthionine‐(S,R)‐sulfoximine (BSO, 20 mM) in the drinking water. Using laser Doppler flowmetry, renal blood perfusion in the cortex and medulla (CBP, MBP) was measured during the infusion of Ap4A. This induced a biphasic response in the CBP: a phase of rapid decrease was followed by one of rapid increase extended for 30 min in both the normocholesterolemic and hypercholesterolemic rats. The phase of decreased CBP was not affected by tempol or BSO in either group. Early and extended increases in CBP were prevented by tempol in the hypercholesterolemia rats, while, in the normocholesterolemic rats, only the extended increase in CBP was affected by tempol; BSO prevented extended increase in CBP in normocholesterolemic rats. MBP response is not affected by hypercholesterolemia. The hypercholesterolemic rats were characterized by increased urinary albumin and 8‐isoPGF2α excretion. Moreover, BSO increased the urinary excretion of nephrin in the hypercholesterolemic rats but, similar to tempol, did not affect the excretion of albumin in their urine. The results suggest the important role of redox balance in the extracellular nucleotide regulation of the renal vasculature and glomerular injury in hypercholesterolemia.
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Affiliation(s)
- Kamil Dąbkowski
- Department of Clinical Chemistry, Medical University of Gdańsk, Gdańsk, Poland
| | - Ewelina Kreft
- Department of Clinical Chemistry, Medical University of Gdańsk, Gdańsk, Poland
| | | | - Gabriela Chyła
- Department of Clinical Chemistry, Medical University of Gdańsk, Gdańsk, Poland
| | - Agnieszka Kuchta
- Department of Clinical Chemistry, Medical University of Gdańsk, Gdańsk, Poland
| | - Maciej Jankowski
- Department of Clinical Chemistry, Medical University of Gdańsk, Gdańsk, Poland
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Wang DL, Dai WY, Wang W, Wen Y, Zhou Y, Zhao YT, Wu J, Liu P. Interfering RNA against PKC-α inhibits TNF-α-induced IP 3R1 expression and improves glomerular filtration rate in rats with fulminant hepatic failure. Am J Physiol Renal Physiol 2018; 314:F942-F955. [PMID: 29357415 DOI: 10.1152/ajprenal.00433.2016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
We have reported that tumor necrosis factor-α (TNF-α) is critical for reduction of glomerular filtration rate (GFR) in rats with fulminant hepatic failure (FHF). The present study aims to evaluate the underlying mechanisms of decreased GFR during acute hepatic failure. Rats with FHF induced by d-galactosamine plus lipopolysaccharide (GalN/LPS) were injected intravenously with recombinant lentivirus harboring short hairpin RNA against the protein kinase C-α ( PKC-α) gene (Lenti-shRNA-PKC-α). GFR, serum levels of aminotransferases, creatinine, urea nitrogen, potassium, sodium, chloride, TNF-α, and endothelin-1 (ET-1), as well as type 1 inositol 1,4,5-trisphosphate receptor (IP3R1) expression in renal tissue were assessed. The effects of PKC-α silencing on TNF-α-induced IP3R1, specificity protein 1 (SP-1), and c-Jun NH2-terminal kinase (JNK) expression, as well as cytosolic calcium content were determined in glomerular mesangial cell (GMCs) with RNAi against PKC-α. Renal IP3R1 overexpression was abrogated by pre-treatment with Lenti-shRNA-PKC-α. The PKC-α silence significantly improved the compromised GFR, reduced Cr levels, and reversed the decrease in glomerular inulin space and the increase in glomerular calcium content in GalN/LPS-exposed rats. TNF-α treatment increased expression of PKC-α, IP3R1, specificity protein 1 (SP-1), JNK, and p-JNK in GMCs and increased Ca2 + release and binding activity of SP-1 to the IP3R1 promoter. These effects were blocked by transfection of siRNA against the PKC-α gene, and the PKC-α gene silence also restored cytosolic Ca2+ concentration. RNAi targeting PKC-α inhibited TNF-α-induced IP3R1 overexpression and in turn improved compromised GFR in the development of acute kidney injury during FHF in rats.
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Affiliation(s)
- Dong-Lei Wang
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China
| | - Wen-Ying Dai
- The Sixth People's Hospital of Shenyang, Shenyang City, Liaoning Province, People's Republic of China
| | - Wen Wang
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China
| | - Ying Wen
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China
| | - Ying Zhou
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China
| | - Yi-Tong Zhao
- The Sixth People's Hospital of Shenyang, Shenyang City, Liaoning Province, People's Republic of China
| | - Jian Wu
- Department of Medical Microbiology, Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University , Shanghai , China.,Shanghai Institute of Liver Diseases, Fudan University , Shanghai , China
| | - Pei Liu
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China.,The Institute of liver diseases, China Medical University, Shenyang, Liaoning Province, China
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Patzak A, Carlström M, Sendeski MM, Lai EY, Liu ZZ, Sällström J, Flöge J, Heintz B, Jankowski J, Jankowski V. Diadenosine pentaphosphate modulates glomerular arteriolar tone and glomerular filtration rate. Acta Physiol (Oxf) 2015; 213:285-93. [PMID: 25394939 DOI: 10.1111/apha.12425] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 07/28/2014] [Accepted: 11/09/2014] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Mechanisms and participating substances involved in the reduction of glomerular filtration (GFR) in contrast-induced acute kidney injury (CI-AKI) are still matter of debate. We hypothesized that diadenosine polyphosphates are released by the action of contrast media on tubular cells and may act on glomerular arterioles and reduce GFR. METHODS Freshly isolated rat tubules were treated with the contrast medium iodixanol (47 mg iodine per mL) at 37 °C for 20 min. The content of Apn A (n = 3-6) in the supernatant of treated tubules and in the plasma of healthy persons and patients with AKI was analysed using reversed-phase chromatography, affinity chromatography and mass spectrometry. GFR was obtained in conscious mice by inulin clearance. Concentration response curves for Apn A (n = 3-6, 10(-12) -10(-5) mol L(-1) ) were measured in isolated perfused glomerular arterioles. RESULTS Iodixanol treatment of tubules significantly increased the concentration of Apn A (n = 3-5) in the supernatant. Ap6 A was below the detection limit. AKI patient shows higher concentrations of Apn A compared to healthy. Application of Ap5 A significantly reduced the GFR in conscious mice. Ap5 A reduced afferent arteriolar diameters, but did not influence efferent arterioles. The constrictor effect on afferent arterioles was strong immediately after application, but weakened with time. Then, non-selective P2 inhibitor suramin blocked the Ap5 A-induced constriction. CONCLUSION The data suggest that Ap5 A plays a role in the pathophysiology of CI-AKI. We show a contrast media-induced release of Ap5 A from tubules, which might increase afferent arteriolar resistance and reduce the GFR.
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Affiliation(s)
- A. Patzak
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - M. Carlström
- Department of Physiology and Pharmacology; Karolinska Institutet; Stockholm Sweden
| | - M. M. Sendeski
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - E. Y. Lai
- Department of Physiology; Zhejiang University School of Medicine; Hangzhou China
| | - Z. Z. Liu
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - J. Sällström
- Department of Physiology and Pharmacology; Karolinska Institutet; Stockholm Sweden
| | - J. Flöge
- Division of Nephrology and Clinical Immunology; RWTH University of Aachen; Aachen Germany
| | - B. Heintz
- Division of Nephrology and Clinical Immunology; RWTH University of Aachen; Aachen Germany
| | - J. Jankowski
- Institute of Molecular Cardiovascular Research; RWTH University of Aachen; Aachen Germany
| | - V. Jankowski
- Institute of Molecular Cardiovascular Research; RWTH University of Aachen; Aachen Germany
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Wang JB, Wang DL, Wang HT, Wang ZH, Wen Y, Sun CM, Zhao YT, Wu J, Liu P. Tumor necrosis factor-alpha-induced reduction of glomerular filtration rate in rats with fulminant hepatic failure. J Transl Med 2014; 94:740-51. [PMID: 24887412 DOI: 10.1038/labinvest.2014.71] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 04/11/2014] [Accepted: 04/20/2014] [Indexed: 12/16/2022] Open
Abstract
The mechanism of renal failure during fulminant hepatic failure (FHF) or end-stage of liver disease is not fully understood. The present study aims to delineate the mechanisms of decreased glomerular filtration rate (GFR) in acute hepatic failure. A rat model of renal insufficiency in severe liver injury was established by lipopolysaccharide (LPS) plus D-galactosamine (GalN) exposure. GFR was evaluated by continuous infusion of fluorescein isothiocyanate-inulin with implanted micro-osmotic pumps. GalN/LPS intoxication resulted in severe hepatocyte toxicity as evidenced by liver histology and biochemical tests, whereas renal morphology remained normal. GFR was reduced by 33% of the controls 12 h after GalN/LPS exposure, accompanied with a decreased serum sodium levels, a marked increase in serum TNF-α and ET-1 levels as well as significantly upregulated renal type 1 inositol 1,4,5-trisphosphate receptor (IP3R1) expression. The upregulated IP3R1 expression was abrogated by the treatment of anti-TNF-α antibodies, but not by 2-aminoethoxydiphenylborate (2-APB), which blocks the inositol 1,4,5-trisphosphate signaling pathway. Treatments with either TNF-α antibodies or 2-APB also significantly improved the compromised GFR, elevated serum urea nitrogen and creatinine levels, and reversed the decrease in glomerular inulin space and the increase in glomerular calcium content in GalN/LPS-exposed rats. The extent of acute liver injury as reflected by serum ALT levels was much more attenuated by anti-TNF-α antibodies than by 2-APB. Liver histology further confirmed that anti-TNF-α antibodies conferred better protection than 2-APB in GalN/LPS-exposed rats. LPS-elicited TNF-α over-production is responsible for decreased GFR through IP3R1 overexpression, and the compromised GFR resulted in the development of acute renal failure in rats with FHF.
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Affiliation(s)
- Jing-Bo Wang
- 1] Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China [2] Division of Gastroenterology, Department of Internal Medicine, The Sixth People's Hospital of Shenyang, Shenyang City, People's Republic of China
| | - Dong-Lei Wang
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
| | - Hai-Tao Wang
- Division of Hepatobiliary Diseases, Department of Surgery, The Affiliated Shenzhou Hospital of Shenyang Medical College, Shenyang City, People's Republic of China
| | - Zhao-Han Wang
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
| | - Ying Wen
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
| | - Cui-Ming Sun
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
| | - Yi-Tong Zhao
- Division of Gastroenterology, Department of Internal Medicine, The Sixth People's Hospital of Shenyang, Shenyang City, People's Republic of China
| | - Jian Wu
- 1] Department of Internal Medicine, Division of Gastroenterology and Hepatology, University of California, Davis Medical Center, Sacramento, CA, USA [2] Key Laboratory of Molecular Virology, Fudan University College of Basic Medical Sciences, Shanghai, People's Republic of China
| | - Pei Liu
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
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Burnstock G, Evans LC, Bailey MA. Purinergic signalling in the kidney in health and disease. Purinergic Signal 2014; 10:71-101. [PMID: 24265071 PMCID: PMC3944043 DOI: 10.1007/s11302-013-9400-5] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 10/24/2013] [Indexed: 12/21/2022] Open
Abstract
The involvement of purinergic signalling in kidney physiology and pathophysiology is rapidly gaining recognition and this is a comprehensive review of early and recent publications in the field. Purinergic signalling involvement is described in several important intrarenal regulatory mechanisms, including tuboglomerular feedback, the autoregulatory response of the glomerular and extraglomerular microcirculation and the control of renin release. Furthermore, purinergic signalling influences water and electrolyte transport in all segments of the renal tubule. Reports about purine- and pyrimidine-mediated actions in diseases of the kidney, including polycystic kidney disease, nephritis, diabetes, hypertension and nephrotoxicant injury are covered and possible purinergic therapeutic strategies discussed.
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Affiliation(s)
- Geoffrey Burnstock
- Autonomic Neuroscience Centre, University College Medical School, Rowland Hill Street, London, NW3 2PF, UK,
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Physiological roles and potential therapeutic applications of the P2X7 receptor in inflammation and pain. Molecules 2013; 18:10953-72. [PMID: 24013409 PMCID: PMC6270334 DOI: 10.3390/molecules180910953] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 08/26/2013] [Accepted: 08/27/2013] [Indexed: 12/21/2022] Open
Abstract
The P2X7 receptor (P2X7R) is a nonselective cation channel that is activated by extracellular ATP and triggers the secretion of several proinflammatory substances, such as IL-1β, IL-18, TNF-α, and nitric oxide. Recently, several preclinical studies have demonstrated that this receptor participates in inflammation and pain mechanisms. Taken together, these results indicate that P2X7R is a promising pharmacological target, and compounds that modulate the function of this receptor show potential as new anti-inflammatory medicines. In this review, we discuss aspects of P2X7R pharmacology and the participation of this protein in inflammation and pain and provide an overview of some promising compounds that have been tested as antagonists of P2X7R, with clinical applicability.
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