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Kaufmann J, Martinka P, Moede O, Sendeski M, Steege A, Fähling M, Hultström M, Gaestel M, Moraes-Silva IC, Nikitina T, Liu ZZ, Zavaritskaya O, Patzak A. Noradrenaline enhances angiotensin II responses via p38 MAPK activation after hypoxia/re-oxygenation in renal interlobar arteries. Acta Physiol (Oxf) 2015; 213:920-32. [PMID: 25594617 DOI: 10.1111/apha.12457] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Revised: 03/14/2014] [Accepted: 01/11/2015] [Indexed: 11/29/2022]
Abstract
AIM Hypoxia and sympathetic activation are main factors in the pathogenesis of acute kidney injury (AKI). We tested the hypothesis that noradrenaline (NE) in combination with hypoxia aggravates the vasoreactivity of renal arteries after hypoxia/re-oxygenation (H/R). We tested the role of adrenergic receptors and p38 MAPK using an in vitro H/R protocol. METHODS Mouse interlobar arteries (ILA) and afferent arterioles (AA) were investigated under isometric and isotonic conditions respectively. The in vitro protocol consisted of 60-min hypoxia and control condition, respectively, 10-min re-oxygenation followed by concentration-response curves for Ang II or endothelin. RESULTS Hypoxia reduced the response to Ang II. Hypoxia and NE (10(-9) mol L(-1) ) together increased it in ILA and AA. In ILA, NE alone influenced neither Ang II responses under control conditions nor endothelin responses after hypoxia. Prazosin or yohimbine treatment did not significantly influence the NE+hypoxia effect. The combination of prazosin and yohimbine or propranolol alone inhibited the effect of NE+hypoxia. BRL37344 (β3 receptor agonist) mimicked the NE effect. In contrast, the incubation with β3 receptor blocker did not influence the mentioned effect. Phosphorylation of p38 MAPK and MLC(20) was increased after H/R with NE and Ang II treatment. The selective p38 MAPK inhibitor SB202190 blocked the NE+hypoxia effect on the Ang II response. CONCLUSION The results suggest an interaction of NE and hypoxia in enhancing vasoreactivity, which may be important for the pathogenesis of AKI. The effect of NE+hypoxia in ILA is mediated by several adrenergic receptors and requires the p38 MAPK activation.
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Affiliation(s)
- J. Kaufmann
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - P. Martinka
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - O. Moede
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - M. Sendeski
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - A. Steege
- Department of Internal Medicine II; University Medical Center Regensburg; Regensburg Germany
| | - M. Fähling
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - M. Hultström
- Institute of Medical Cell Biology; Uppsala University; Uppsala Sweden
| | - M. Gaestel
- Institute of Biochemistry; Hannover Medical School; Hannover Germany
| | - I. C. Moraes-Silva
- Heart Institute; University of São Paulo; School of Medicine; São Paulo Brazil
| | - T. Nikitina
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - Z. Z. Liu
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
| | - O. Zavaritskaya
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
- Cardiovascular Physiology; Centre for Biomedicine and Medical Technology Mannheim; Ruprecht-Karls-University Heidelberg; Mannheim Germany
| | - A. Patzak
- Institute of Vegetative Physiology; Charité-Universitätsmedizin Berlin; Berlin Germany
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Nikitina T, Zavaritskaya O, Semenyutin V, Persson PB, Patzak A, Sendeski M. Effects of iodinated contrast media in a novel model for cerebral vasospasm. Arq Neuropsiquiatr 2015; 73:125-31. [PMID: 25742582 DOI: 10.1590/0004-282x20140222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 11/10/2014] [Indexed: 11/22/2022]
Abstract
OBJECTIVE We developed an in vitro model for vasospasm post subarachnoid hemorrhage that was suitable for investigating brain vessel autoregulation. We further investigated the effects of iodinated contrast medium on the vascular tone and the myogenic response of spastic cerebral vessels. METHOD We isolated and perfused the superior cerebellar arteries of rats. The vessels were pressurized and studied under isobaric conditions. Coagulated blood was used to simulate subarachnoid hemorrhage. The contrast medium iodixanol was applied intraluminally. RESULTS Vessels exposed to blood developed significantly stronger myogenic tone (65.7 ± 2.0% vs 77.1 ± 1.2% of the maximum diameter, for the blood and the control group, respectively) and significantly decreased myogenic response, compared with the control groups. The contrast medium did not worsen the myogenic tone or the myogenic response in any group. CONCLUSION Our results show that deranged myogenic response may contribute to cerebral blood flow disturbances subsequent to subarachnoid hemorrhage. The contrast medium did not have any negative influence on vessel tone or myogenic response in this experimental setting.
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Affiliation(s)
- Tatiana Nikitina
- Charité-Universitaetsmedizin Berlin, Institut fuer Vegetative Physiologie, Berlin, Germany
| | - Olga Zavaritskaya
- Medical Faculty Mannheim, Research Division Cardiovascular Physiology, Mannheim, Germany
| | - Vladimir Semenyutin
- Russian Polenov Neurosurgical Institute, Laboratory of Brain Circulation Pathology, Saint-Petersburg, Russia
| | - Pontus B Persson
- Charité-Universitaetsmedizin Berlin, Institut fuer Vegetative Physiologie, Berlin, Germany
| | - Andreas Patzak
- Charité-Universitaetsmedizin Berlin, Institut fuer Vegetative Physiologie, Berlin, Germany
| | - Mauricio Sendeski
- Charité-Universitaetsmedizin Berlin, Institut fuer Vegetative Physiologie, Berlin, Germany
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Chen L, Kaßmann M, Sendeski M, Tsvetkov D, Marko L, Michalick L, Riehle M, Liedtke WB, Kuebler WM, Harteneck C, Tepel M, Patzak A, Gollasch M. Functional transient receptor potential vanilloid 1 and transient receptor potential vanilloid 4 channels along different segments of the renal vasculature. Acta Physiol (Oxf) 2015; 213:481-91. [PMID: 25069877 DOI: 10.1111/apha.12355] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 05/26/2014] [Accepted: 07/22/2014] [Indexed: 12/19/2022]
Abstract
AIM Transient receptor potential vanilloid 1 (TRPV1) and vanilloid 4 (TRPV4) cation channels have been recently identified to promote endothelium-dependent relaxation of mouse mesenteric arteries. However, the role of TRPV1 and TRPV4 in the renal vasculature is largely unknown. We hypothesized that TRPV1/4 plays a role in endothelium-dependent vasodilation of renal blood vessels. METHODS We studied the distribution of functional TRPV1/4 along different segments of the renal vasculature. Mesenteric arteries were studied as control vessels. RESULTS The TRPV1 agonist capsaicin relaxed mouse mesenteric arteries with an EC50 of 25 nm, but large mouse renal arteries or rat descending vasa recta only at >100-fold higher concentrations. The vasodilatory effect of capsaicin in the low-nanomolar concentration range was endothelium-dependent and absent in vessels of Trpv1 -/- mice. The TRPV4 agonist GSK1016790A relaxed large conducting renal arteries, mesenteric arteries and vasa recta with EC50 of 18, 63 nm and ~10 nm respectively. These effects were endothelium-dependent and inhibited by a TRPV4 antagonist, AB159908 (10 μm). Capsaicin and GSK1016790A produced vascular dilation in isolated mouse perfused kidneys with EC50 of 23 and 3 nm respectively. The capsaicin effects were largely reduced in Trpv1 -/- kidneys, and the effects of GSK1016790A were inhibited in Trpv4 -/- kidneys. CONCLUSION Our results demonstrate that two TRPV channels have unique sites of vasoregulatory function in the kidney with functional TRPV1 having a narrow, discrete distribution in the resistance vasculature and TRPV4 having more universal, widespread distribution along different vascular segments. We suggest that TRPV1/4 channels are potent therapeutic targets for site-specific vasodilation in the kidney.
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Affiliation(s)
- L. Chen
- Experimental and Clinical Research Center (ECRC); Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine (MDC); Berlin Germany
- Xiamen Zhongshan Hospital; Xiamen University; Xiamen China
| | - M. Kaßmann
- Experimental and Clinical Research Center (ECRC); Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine (MDC); Berlin Germany
| | - M. Sendeski
- Institute of Vegetative Physiology; Charité University Medicine Berlin; Berlin Germany
| | - D. Tsvetkov
- Experimental and Clinical Research Center (ECRC); Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine (MDC); Berlin Germany
| | - L. Marko
- Experimental and Clinical Research Center (ECRC); Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine (MDC); Berlin Germany
| | - L. Michalick
- German Heart Center Berlin; Institute of Physiology; Charité University Medicine Berlin; Berlin Germany
| | - M. Riehle
- Department of Pharmacology and Experimental Therapy; Institute of Experimental and Clinical Pharmacology and Toxicology; Eberhard Karls University Hospitals and Clinics; Interfaculty Center of Pharmacogenomics and Drug Research; University of Tübingen; Tübingen Germany
| | - W. B. Liedtke
- Department of Neurology and Neurobiology; Center for Translational Neuroscience; Duke University Medical Center; Durham NC USA
| | - W. M. Kuebler
- German Heart Center Berlin; Institute of Physiology; Charité University Medicine Berlin; Berlin Germany
| | - C. Harteneck
- Department of Pharmacology and Experimental Therapy; Institute of Experimental and Clinical Pharmacology and Toxicology; Eberhard Karls University Hospitals and Clinics; Interfaculty Center of Pharmacogenomics and Drug Research; University of Tübingen; Tübingen Germany
| | - M. Tepel
- Department of Cardiovascular and Renal Research; Department of Nephrology; University of Southern Denmark; Odense Denmark
| | - A. Patzak
- Institute of Vegetative Physiology; Charité University Medicine Berlin; Berlin Germany
| | - M. Gollasch
- Experimental and Clinical Research Center (ECRC); Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine (MDC); Berlin Germany
- Medical Clinic for Nephrology and Internal Intensive Care; Charité Campus Virchow; Berlin Germany
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Nikitina T, Zavaritskaya O, Semenyutin V, Patzak A, Sendeski M. Effects of iodinated contrast media on a novel model of vasospasm due to subarachnoid hemorrhage (LB504). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.lb504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tatiana Nikitina
- Institute for Vegetative Physiology Charite‐Universitaetsmedizin BerlinBerlinGermany
| | - Olga Zavaritskaya
- Research Division Cardiovascular Physiology Medical Faculty MannheimMannheimGermany
| | - Vladimir Semenyutin
- Laboratory of Brain Circulation Pathology Russian Polenov Neurosurgical InstituteSaint‐PetersburgRussian Federation
| | - Andreas Patzak
- Institute for Vegetative Physiology Charite‐Universitaetsmedizin BerlinBerlinGermany
| | - Mauricio Sendeski
- Institute for Vegetative Physiology Charite‐Universitaetsmedizin BerlinBerlinGermany
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Sendeski M. Improvement and innovation in neurosurgery. Arq Neuropsiquiatr 2014; 72:89-90. [PMID: 24604359 DOI: 10.1590/0004-282x20130253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 01/27/2014] [Indexed: 11/22/2022]
Affiliation(s)
- Mauricio Sendeski
- Charité Universitaetsmedizin Berlin, Institut fuer Vegetative Physiologie, Charité Universitaetsmedizin Berlin - Institut fuer Vegetative Physiologie
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Xiong Y, Liu ZZ, Georgieva R, Smuda K, Steffen A, Sendeski M, Voigt A, Patzak A, Bäumler H. Nonvasoconstrictive hemoglobin particles as oxygen carriers. ACS Nano 2013; 7:7454-7461. [PMID: 23915101 DOI: 10.1021/nn402073n] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Artificial oxygen carriers, favorably hemoglobin-based oxygen carriers (HBOCs), are being investigated intensively during the last 30 years with the aim to develop a universal blood substitute. However, serious side effects mainly caused by vasoconstriction triggered by nitric oxide (NO) scavenging due to penetration of nanosized HBOCs through the endothelial gaps of the capillary walls and/or oxygen oversupply in the precapillary arterioles due to their low oxygen affinity led to failure of clinical trials and FDA disapproval. To avoid these effects, HBOCs with a size between 100 and 1000 nm and high oxygen affinity are needed. Here we present for the first time unique hemoglobin particles (HbPs) of around 700 nm with high oxygen affinity and low immunogenicity using a novel, highly effective, and simple technique. The fabrication procedure provides particles with a narrow size distribution and nearly uniform morphology. The content of hemoglobin (Hb) in the particles corresponded to 80% of the Hb content in native erythrocytes. Furthermore, we demonstrate a successful perfusion of isolated mouse glomeruli with concentrated HbP suspensions in vitro. A normal, nonvasoconstrictive behavior of the afferent arterioles is observed, suggesting no oxygen oversupply and limited NO scavenging by these particles, making them a highly promising blood substitute.
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Affiliation(s)
- Yu Xiong
- Institute of Transfusion Medicine and Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin , Charitéplatz 1, 10117 Berlin, Germany
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Abstract
In general, iodinated contrast media (CM) are tolerated well, and CM use is steadily increasing. Acute kidney injury is the leading life-threatening side effect of CM. Here, we highlight endpoints used to assess CM-induced acute kidney injury (CIAKI), CM types, risk factors, and CIAKI prevention. Moreover, we put forward a unifying theory as to how CIAKI comes about; the kidney medulla's unique hyperosmolar environment concentrates CM in the tubules and vasculature. Highly concentrated CM in the tubules and vessels increases fluid viscosity. Thus, flow through medullary tubules and vessels decreases. Reducing the flow rate will increase the contact time of cytotoxic CM with the tubular epithelial cells and vascular endothelium, and thereby damage cells and generate oxygen radicals. As a result, medullary vasoconstriction takes place, causing hypoxia. Moreover, the glomerular filtration rate declines due to congestion of highly viscous tubular fluid. Effective prevention aims at reducing the medullary concentration of CM, thereby diminishing fluid viscosity. This is achieved by generous hydration using isotonic electrolyte solutions. Even forced diuresis may prove efficient if accompanied by adequate volume supplementation. Limiting the CM dose is the most effective measure to diminish fluid viscosity and to reduce cytotoxic effects.
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Affiliation(s)
- Erdmann Seeliger
- Institute of Physiology, Center for Cardiovascular Research, Charité-Universitätsmedizin Berlin, CCM, Hessische Str. 3-4, Berlin D-10115, Germany.
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Gao X, Patzak A, Sendeski M, Scheffer PG, Teerlink T, Sällström J, Fredholm BB, Persson AEG, Carlström M. Adenosine A1-receptor deficiency diminishes afferent arteriolar and blood pressure responses during nitric oxide inhibition and angiotensin II treatment. Am J Physiol Regul Integr Comp Physiol 2011; 301:R1669-81. [DOI: 10.1152/ajpregu.00268.2011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Adenosine mediates tubuloglomerular feedback responses via activation of A1-receptors on the renal afferent arteriole. Increased preglomerular reactivity, due to reduced nitric oxide (NO) production or increased levels of ANG II and reactive oxygen species (ROS), has been linked to hypertension. Using A1-receptor knockout (A1−/−) and wild-type (A1+/+) mice we investigated the hypothesis that A1-receptors modulate arteriolar and blood pressure responses during NO synthase (NOS) inhibition or ANG II treatment. Blood pressure and renal afferent arteriolar responses were measured in nontreated mice and in mice with prolonged Nω-nitro-l-arginine methyl ester hydrochloride (l-NAME) or ANG II treatment. The hypertensive responses to l-NAME and ANG II were clearly attenuated in A1−/− mice. Arteriolar contractions to l-NAME (10−4 mol/l; 15 min) and cumulative ANG II application (10−12 to 10−6 mol/l) were lower in A1−/− mice. Simultaneous treatment with tempol (10−4 mol/l; 15 min) attenuated arteriolar responses in A1+/+ but not in A1−/− mice, suggesting differences in ROS formation. Chronic treatment with l-NAME or ANG II did not alter arteriolar responses in A1−/− mice, but enhanced maximal contractions in A1+/+ mice. In addition, chronic treatments were associated with higher plasma levels of dimethylarginines (asymmetrical and symmetrical) and oxidative stress marker malondialdehyde in A1+/+ mice, and gene expression analysis showed reduced upregulation of NOS-isoforms and greater upregulation of NADPH oxidases. In conclusion, adenosine A1-receptors enhance preglomerular responses during NO inhibition and ANG II treatment. Interruption of A1-receptor signaling blunts l-NAME and ANG II-induced hypertension and oxidative stress and is linked to reduced responsiveness of afferent arterioles.
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Affiliation(s)
- Xiang Gao
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Andreas Patzak
- Institute of Vegetative Physiology, Charité-Universitätsmedizin Berlin, Germany
| | - Mauricio Sendeski
- Institute of Vegetative Physiology, Charité-Universitätsmedizin Berlin, Germany
| | - Peter G. Scheffer
- Department of Clinical Chemistry, VU University Medical Centre, Amsterdam, Netherlands; and
| | - Tom Teerlink
- Department of Clinical Chemistry, VU University Medical Centre, Amsterdam, Netherlands; and
| | - Johan Sällström
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Bertil B. Fredholm
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | | | - Mattias Carlström
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
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Carlstrom M, Gao X, Patzak A, Sendeski M, Weitzberg E, Lundberg J, Persson AEG. P66. Inorganic nitrite attenuates angiotensin ii induced contraction of renal microcirculation via xanthine oxidase-dependent no production. Nitric Oxide 2011. [DOI: 10.1016/j.niox.2011.03.297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Carlstrom M, Gao X, Patzak A, Sendeski M, Lundberg JO, Persson EG. Inorganic nitrite attenuates Ang II‐mediated contraction of renal arterioles via xanthine oxidase‐dependent generation of nitric oxide. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.665.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mattias Carlstrom
- Medical Cell BiologyUppsala UniversityUppsalaSweden
- Physiology and PharmacologyKarolinska InstitutetStockholmSweden
| | - Xiang Gao
- Medical Cell BiologyUppsala UniversityUppsalaSweden
| | - Andreas Patzak
- Institute of Vegetative PhysiologyCharité‐Universitätsmedizin BerlinBerlinGermany
| | - Mauricio Sendeski
- Institute of Vegetative PhysiologyCharité‐Universitätsmedizin BerlinBerlinGermany
| | - Jon O Lundberg
- Physiology and PharmacologyKarolinska InstitutetStockholmSweden
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Patzak A, Fähling M, Sendeski M, Persson PB, Kaufmann J. Norepinephrine increases the angiotensin II response of interlobar arteries in a hypoxia/reperfusion model. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.665.23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Schildroth J, Rettig-Zimmermann J, Kalk P, Steege A, Fähling M, Sendeski M, Paliege A, Lai EY, Bachmann S, Persson PB, Hocher B, Patzak A. Endothelin type A and B receptors in the control of afferent and efferent arterioles in mice. Nephrol Dial Transplant 2010; 26:779-89. [PMID: 20813769 DOI: 10.1093/ndt/gfq534] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Endothelin 1 contributes to renal blood flow control and pathogenesis of kidney diseases. The differential effects, however, of endothelin 1 (ET-1) on afferent (AA) and efferent arterioles (EA) remain to be established. METHODS We investigated endothelin type A and B receptor (ETA-R, ETB-R) functions in the control of AA and EA. Arterioles of ETB-R deficient, rescued mice [ETB(-/-)] and wild types [ETB(+/+)] were microperfused. RESULTS ET-1 constricted AA stronger than EA in ETB(-/-) and ETB(+/+) mice. Results in AA: ET-1 induced similar constrictions in ETB(-/-) and ETB(+/+) mice. BQ-123 (ETA-R antagonist) inhibited this response in both groups. ALA-ET-1 and IRL1620 (ETB-R agonists) had no effect on arteriolar diameter. L-NAME did neither affect basal diameters nor ET-1 responses. Results in EA: ET-1 constricted EA stronger in ETB(+/+) compared to ETB(-/-). BQ-123 inhibited the constriction completely only in ETB(-/-). ALA-ET-1 and IRL1620 constricted only arterioles of ETB(+/+) mice. L-NAME decreased basal diameter in ETB(+/+), but not in ETB(-/-) mice and increased the ET-1 response similarly in both groups. The L-NAME actions indicate a contribution of ETB-R in basal nitric oxide (NO) release in EA and suggest dilatory action of ETA-R in EA. CONCLUSIONS ETA-R mediates vasoconstriction in AA and contributes to vasoconstriction in EA in this mouse model. ETB-R has no effect in AA but mediates basal NO release and constriction in EA. The stronger effect of ET-1 on AA supports observations of decreased glomerular filtration rate to ET-1 and indicates a potential contribution of ET-1 to the pathogenesis of kidney diseases.
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Affiliation(s)
- Janice Schildroth
- Institute of Vegetative Physiology, Charité-Universitätsmedizin Berlin, Berlin, Germany
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Cao C, Edwards A, Sendeski M, Lee-Kwon W, Cui L, Cai CY, Patzak A, Pallone TL. Intrinsic nitric oxide and superoxide production regulates descending vasa recta contraction. Am J Physiol Renal Physiol 2010; 299:F1056-64. [PMID: 20702600 DOI: 10.1152/ajprenal.00070.2010] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Descending vasa recta (DVR) are 12- to 15-μm microvessels that supply the renal medulla with blood flow. We examined the ability of intrinsic nitric oxide (NO) and reactive oxygen species (ROS) generation to regulate their vasoactivity. Nitric oxide synthase (NOS) inhibition with N(ω)-nitro-l-arginine methyl ester (l-NAME; 100 μmol/l), or asymmetric N(G),N(G)-dimethyl-l-arginine (ADMA; 100 μmol/l), constricted isolated microperfused DVR by 48.82 ± 4.34 and 27.91 ± 2.91%, respectively. Restoring NO with sodium nitroprusside (SNP; 1 mmol/l) or application of 8-Br-cGMP (100 μmol/l) reversed DVR vasoconstriction by l-NAME. The superoxide dismutase mimetic Tempol (1 mmol/l) and the NAD(P)H inhibitor apocynin (100, 1,000 μmol/l) also blunted ADMA- or l-NAME-induced vasoconstriction, implicating a role for concomitant generation of ROS. A role for ROS generation was also supported by an l-NAME-associated rise in oxidation of dihydroethidium that was prevented by Tempol or apocynin. To test whether H(2)O(2) might play a role, we examined its direct effects. From 1 to 100 μmol/l, H(2)O(2) contracted DVR whereas at 1 mmol/l it was vasodilatory. The H(2)O(2) scavenger polyethylene glycol-catalase reversed H(2)O(2) (10 μmol/l)-induced vasoconstriction; however, it did not affect l-NAME-induced contraction. Finally, the previously known rise in DVR permeability to (22)Na and [(3)H]raffinose that occurs with luminal perfusion was not prevented by NOS blockade. We conclude that intrinsic production of NO and ROS can modulate DVR vasoactivity and that l-NAME-induced vasoconstriction occurs, in part, by modulating superoxide concentration and not through H(2)O(2) generation. Intrinsic NO production does not affect DVR permeability to hydrophilic solutes.
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Affiliation(s)
- Chunhua Cao
- Div. of Nephrology, N3W143, 22 S. Greene St., UMMS, Baltimore, MD 21201, USA.
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Sendeski M, Patzak A, Pallone TL, Cao C, Persson AE, Persson PB. Iodixanol, constriction of medullary descending vasa recta, and risk for contrast medium-induced nephropathy. Radiology 2009; 251:697-704. [PMID: 19366904 DOI: 10.1148/radiol.2513081732] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
PURPOSE To determine whether a type of contrast medium (CM), iodixanol, modifies outer medullary descending vasa recta (DVR) vasoreactivity and nitric oxide (NO) production in isolated microperfused DVR. MATERIALS AND METHODS Animal handling conformed to the Animal Care Committee Guidelines of all participating institutions. Single specimens of DVR were isolated from rats and perfused with a buffered solution containing iodixanol. A concentration of 23 mg of iodine per milliliter was chosen to mimic that expected to be used in usual examinations in humans. Luminal diameter was determined by using video microscopy, and NO was measured by using fluorescent techniques. RESULTS Iodixanol led to 52% reduction of DVR luminal diameter, a narrowing that might interfere with passage of erythrocytes in vivo. Vasoconstriction induced by angiotensin II was enhanced by iodixanol. Moreover, iodixanol decreased NO bioavailability by more than 82%. Use of 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl (a superoxide dismutase mimetic) prevented both vasoconstriction with iodixanol alone and increased constriction with angiotensin II caused by CM. CONCLUSION Iodixanol in doses typically used for coronary interventions constricts DVR, intensifies angiotensin II-induced constriction, and reduces bioavailability of NO. CM-induced nephropathy may be related to these events and scavenging of reactive oxygen species might exert a therapeutic benefit by preventing the adverse effects that a CM has on medullary perfusion.
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Affiliation(s)
- Mauricio Sendeski
- Institute of Vegetative Physiology, Charité-Universitätsmedizin Berlin, Humboldt-Universität zu Berlin, Tucholskystrasse 2, Berlin 10117, Germany.
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Kastner C, Pohl M, Sendeski M, Stange G, Wagner CA, Jensen B, Patzak A, Bachmann S, Theilig F. Effects of receptor-mediated endocytosis and tubular protein composition on volume retention in experimental glomerulonephritis. Am J Physiol Renal Physiol 2009; 296:F902-11. [PMID: 19193726 DOI: 10.1152/ajprenal.90451.2008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Human glomerulonephritis (GN) is characterized by sustained proteinuria, sodium retention, hypertension, and edema formation. Increasing quantities of filtered protein enter the renal tubule, where they may alter epithelial transport functions. Exaggerated endocytosis and consequent protein overload may affect proximal tubules, but intrinsic malfunction of distal epithelia has also been reported. A straightforward assignment to a particular tubule segment causing salt retention in GN is still controversial. We hypothesized that 1) trafficking and surface expression of major transporters and channels involved in volume regulation were altered in GN, and 2) proximal tubular endocytosis may influence locally as well as downstream expressed tubular transporters and channels. Effects of anti-glomerular basement membrane GN were studied in controls and megalin-deficient mice with blunted proximal endocytosis. Mice displayed salt retention and elevated systolic blood pressure when proteinuria had reached 10-15 mg/24 h. Surface expression of proximal Na(+)-coupled transporters and water channels was in part [Na(+)-P(i) cotransporter IIa (NaPi-IIa) and aquaporin-1 (AQP1)] increased by megalin deficiency alone, but unchanged (Na(+)/H(+) exchanger 3) or reduced (NaPi-IIa and AQP1) in GN irrespective of the endocytosis defect. In distal epithelia, significant increases in proteolytic cleavage products of alpha-epithelial Na(+) channel (ENaC) and gamma-ENaC were observed, suggesting enhanced tubular sodium reabsorption. The effects of glomerular proteinuria dominated over those of blunted proximal endocytosis in contributing to ENaC cleavage. Our data indicate that ENaC-mediated sodium entry may be the rate-limiting step in proteinuric sodium retention. Enhanced proteolytic cleavage of ENaC points to a novel mechanism of channel activation which may involve the action of filtered plasma proteases.
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Affiliation(s)
- Christian Kastner
- Charité-Universitätsmedizin Berlin, Institut für Vegetative Anatomie, Philippstr. 12, 10115 Berlin, Germany
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Carlström M, Lai EY, Steege A, Sendeski M, Ma Z, Zabihi S, Eriksson UJ, Patzak A, Persson AEG. Nitric Oxide Deficiency and Increased Adenosine Response of Afferent Arterioles in Hydronephrotic Mice With Hypertension. Hypertension 2008; 51:1386-92. [DOI: 10.1161/hypertensionaha.108.111070] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Afferent arterioles were used to investigate the role of adenosine, angiotensin II, NO, and reactive oxygen species in the pathogenesis of increased tubuloglomerular feedback response in hydronephrosis. Hydronephrosis was induced in wild-type mice, superoxide dismutase-1 overexpressed mice (superoxide-dismutase-1 transgenic), and deficient mice (superoxide dismutase-1 knockout). Isotonic contractions in isolated perfused arterioles and mRNA expression of NO synthase isoforms, adenosine, and angiotensin II receptors were measured. In wild-type mice,
N
G
-nitro-
l
-arginine methyl ester (
l
-NAME) did not change the basal arteriolar diameter of hydronephrotic kidneys (−6%) but reduced it in control (−12%) and contralateral arterioles (−43%). Angiotensin II mediated a weaker maximum contraction of hydronephrotic arterioles (−18%) than in control (−42%) and contralateral arterioles (−49%). The maximum adenosine-induced constriction was stronger in hydronephrotic (−19%) compared with control (−8%) and contralateral kidneys (±0%). The response to angiotensin II became stronger in the presence of adenosine in hydronephrotic kidneys and attenuated in contralateral arterioles.
l
-NAME increased angiotensin II responses of all of the groups but less in hydronephrotic kidneys. The mRNA expression of endothelial NO synthase and inducible NO synthase was upregulated in the hydronephrotic arterioles. No differences were found for adenosine or angiotensin II receptors. In superoxide dismutase-1 transgenic mice, strong but similar
l
-NAME response (−40%) was observed for all of the groups. This response was totally abolished in arterioles of hydronephrotic superoxide dismutase-1 knockout mice. In conclusion, hydronephrosis is associated with changes in the arteriolar reactivity of both hydronephrotic and contralateral kidneys. Increased oxidative stress, reduced NO availability, and stronger reactivity to adenosine of the hydronephrotic kidney may contribute to the enhanced tubuloglomerular feedback responsiveness in hydronephrosis and be involved in the development of hypertension.
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Affiliation(s)
- Mattias Carlström
- From the Department of Medical Cell Biology (M.C., E.Y.L., Z.M., S.Z., U.J.E., A.P., A.E.G.P.), Division of Integrative Physiology, Uppsala University, Uppsala, Sweden; Institute of Vegetative Physiology (A.S., M.S., A.P.), University Hospital Charité, Humboldt University of Berlin, Germany; and the Division of Nephrology (Z.M.), Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - En Yin Lai
- From the Department of Medical Cell Biology (M.C., E.Y.L., Z.M., S.Z., U.J.E., A.P., A.E.G.P.), Division of Integrative Physiology, Uppsala University, Uppsala, Sweden; Institute of Vegetative Physiology (A.S., M.S., A.P.), University Hospital Charité, Humboldt University of Berlin, Germany; and the Division of Nephrology (Z.M.), Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Andreas Steege
- From the Department of Medical Cell Biology (M.C., E.Y.L., Z.M., S.Z., U.J.E., A.P., A.E.G.P.), Division of Integrative Physiology, Uppsala University, Uppsala, Sweden; Institute of Vegetative Physiology (A.S., M.S., A.P.), University Hospital Charité, Humboldt University of Berlin, Germany; and the Division of Nephrology (Z.M.), Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Mauricio Sendeski
- From the Department of Medical Cell Biology (M.C., E.Y.L., Z.M., S.Z., U.J.E., A.P., A.E.G.P.), Division of Integrative Physiology, Uppsala University, Uppsala, Sweden; Institute of Vegetative Physiology (A.S., M.S., A.P.), University Hospital Charité, Humboldt University of Berlin, Germany; and the Division of Nephrology (Z.M.), Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Zufu Ma
- From the Department of Medical Cell Biology (M.C., E.Y.L., Z.M., S.Z., U.J.E., A.P., A.E.G.P.), Division of Integrative Physiology, Uppsala University, Uppsala, Sweden; Institute of Vegetative Physiology (A.S., M.S., A.P.), University Hospital Charité, Humboldt University of Berlin, Germany; and the Division of Nephrology (Z.M.), Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Sheller Zabihi
- From the Department of Medical Cell Biology (M.C., E.Y.L., Z.M., S.Z., U.J.E., A.P., A.E.G.P.), Division of Integrative Physiology, Uppsala University, Uppsala, Sweden; Institute of Vegetative Physiology (A.S., M.S., A.P.), University Hospital Charité, Humboldt University of Berlin, Germany; and the Division of Nephrology (Z.M.), Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Ulf J. Eriksson
- From the Department of Medical Cell Biology (M.C., E.Y.L., Z.M., S.Z., U.J.E., A.P., A.E.G.P.), Division of Integrative Physiology, Uppsala University, Uppsala, Sweden; Institute of Vegetative Physiology (A.S., M.S., A.P.), University Hospital Charité, Humboldt University of Berlin, Germany; and the Division of Nephrology (Z.M.), Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Andreas Patzak
- From the Department of Medical Cell Biology (M.C., E.Y.L., Z.M., S.Z., U.J.E., A.P., A.E.G.P.), Division of Integrative Physiology, Uppsala University, Uppsala, Sweden; Institute of Vegetative Physiology (A.S., M.S., A.P.), University Hospital Charité, Humboldt University of Berlin, Germany; and the Division of Nephrology (Z.M.), Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - A. Erik G. Persson
- From the Department of Medical Cell Biology (M.C., E.Y.L., Z.M., S.Z., U.J.E., A.P., A.E.G.P.), Division of Integrative Physiology, Uppsala University, Uppsala, Sweden; Institute of Vegetative Physiology (A.S., M.S., A.P.), University Hospital Charité, Humboldt University of Berlin, Germany; and the Division of Nephrology (Z.M.), Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
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Schildroth J, Sendeski M, Rettig J, Steege A, Kalk P, Persson PB, Hocher B, Patzak A. Effect of ET‐1 on afferent arterioles of ET
B
‐receptor deficient mice. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.761.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Philipp Kalk
- Center for Cardiovascular ResearchCharite‐Universitätsmedizin BerlinBerlinGermany
| | | | - Berthold Hocher
- Center for Cardiovascular ResearchCharite‐Universitätsmedizin BerlinBerlinGermany
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18
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Rettig J, Schmidt S, Schildroth J, Paliege A, Martinka P, Sendeski M, Bachmann S, Persson PB, Patzak A. Effect of iron oxide perfusion on renal micro vessel morphology, and dilatory function and endothelial mRNA expression of mouse aorta. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.761.26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - Alexander Paliege
- Institute of Vegetative AnatomyCharite‐Universitätsmedizin BerlinBerlinGermany
| | | | | | - Sebastian Bachmann
- Institute of Vegetative AnatomyCharite‐Universitätsmedizin BerlinBerlinGermany
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Patzak A, Lai EY, Fähling M, Sendeski M, Martinka P, Persson PB, Persson AEG. Adenosine enhances long term the contractile response to angiotensin II in afferent arterioles. Am J Physiol Regul Integr Comp Physiol 2007; 293:R2232-42. [PMID: 17898122 DOI: 10.1152/ajpregu.00357.2007] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Adenosine (Ado) enhances ANG II-induced constrictions of afferent arterioles (Af) by receptor-dependent and -independent pathways. Here, we test the hypothesis that transient Ado treatment has a sustained effect on Af contractility, resulting in increased ANG II responses after longer absence of Ado. Treatment with Ado (cumulative from 10−11to 10−4mol/l) and consecutive washout for 10 or 30 min increased constrictions on ANG II in isolated, perfused Af. Cytosolic calcium transients on ANG II were not enhanced in Ado-treated vessels. Selective or global inhibition of A1- and A2-adenosine receptors did not inhibit the Ado effect. Nitrobenzylthioinosine (an Ado transport inhibitor) clearly reduced the Ado-mediated responses. Selective inhibition of p38 MAPK with SB-203580 also prevented the Ado effect. Inosine treatment did not influence arteriolar reactivity to ANG II. Contractile responses of Af on norepinephrine and endothelin-1 were not influenced by Ado. Phosphorylation of the p38 MAPK and of the regulatory unit of 20-kDa myosin light chain was enhanced after Ado treatment and ANG II in Af. However, phosphorylation of p38 MAPK induced by norepinephrine or endothelin-1 was reduced in vessels treated with Ado, whereas 20-kDa myosin light chain was unchanged. The results suggest an intracellular, long-lasting mechanism including p38 MAPK activation responsible for the increase of ANG II-induced contractions by Ado. The effect is not calcium dependent and specific for ANG II. The prolonged enhancement of the ANG II sensitivity of Af may be important for tubuloglomerular feedback.
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Affiliation(s)
- Andreas Patzak
- Institute of Vegetative Physiology, University Hospital Charité, Humboldt-University of Berlin, Berlin, Germany.
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20
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Lai EY, Martinka P, Fähling M, Mrowka R, Steege A, Gericke A, Sendeski M, Persson PB, Persson AEG, Patzak A. Adenosine restores angiotensin II-induced contractions by receptor-independent enhancement of calcium sensitivity in renal arterioles. Circ Res 2006; 99:1117-24. [PMID: 17038642 DOI: 10.1161/01.res.0000249530.85542.d4] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Adenosine is coupled to energy metabolism and regulates tissue blood flow by modulating vascular resistance. In this study, we investigated isolated, perfused afferent arterioles of mice, which were subjected to desensitization during repeated applications of angiotensin II. Exogenously applied adenosine restores angiotensin II-induced contractions by increasing calcium sensitivity of the arterioles, along with augmented phosphorylation of the regulatory unit of the myosin light chain. Adenosine restores angiotensin II-induced contractions via intracellular action, because inhibition of adenosine receptors do not prevent restoration, but inhibition of NBTI sensitive adenosine transporters does. Restoration was prevented by inhibition of Rho-kinase, protein kinase C, and the p38 mitogen-activated protein kinase, which modulate myosin light chain phosphorylation and thus calcium sensitivity in the smooth muscle. Furthermore, adenosine application increased the intracellular ATP concentration in LuciHEK cells. The results of the study suggest that restoration of the angiotensin II-induced contraction by adenosine is attributable to the increase of the calcium sensitivity by phosphorylation of the myosin light chain. This can be an important component of vascular control during ischemic and hypoxic conditions. Additionally, this mechanism may contribute to the mediation of the tubuloglomerular feedback by adenosine in the juxtaglomerular apparatus of the kidney.
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Affiliation(s)
- En Yin Lai
- Department of Medical Cell Biology, Division of Physiology, University of Uppsala, Sweden
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Sendeski M, Aguiar PH, Zanetti MV, Teixeira MJ, Cescato VA. Neurovascular compression associated with trigeminal neuralgia and systemic arterial hypertension: surgical treatment. Stereotact Funct Neurosurg 2003; 79:284-90. [PMID: 12890987 DOI: 10.1159/000070841] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
OBJECTIVE AND IMPORTANCE To highlight arterial hypertension as an additional factor favoring surgical indication in neurovascular compression syndromes such as trigeminal neuralgia, hemifacial spasm, and glossopharyngeal neuralgia. CLINICAL PRESENTATION A 52-year-old woman with trigeminal neuralgia concomitant with systemic arterial hypertension, submitted initially to unsatisfactory conservative treatment, presents tortuousness and enlargement of the vertebral artery (VA) topography on magnetic resonance imaging (MRI). A microsurgical neurovascular decompression of the trigeminal nerve and the medulla was performed, revealing that the compression was due to the superior cerebellar artery instead of the VA. Both the neuralgia and the hypertension were controlled with no need of medication during a 1-year follow-up. CONCLUSION Surgical indication in neurovascular compression disorders should be reinforced in the presence of concomitant arterial hypertension and a compatible MRI examination.
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