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Miró Ò, Llorens P, Freund Y, Davison B, Takagi K, Herrero-Puente P, Jacob J, Martín-Sánchez FJ, Gil V, Rosselló X, Alquézar-Arbé A, Jiménez-Fábrega FX, Masip J, Mebazaa A, Cotter G. Early intravenous nitroglycerin use in prehospital setting and in the emergency department to treat patients with acute heart failure: Insights from the EAHFE Spanish registry. Int J Cardiol 2021; 344:127-134. [PMID: 34543690 DOI: 10.1016/j.ijcard.2021.09.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/13/2021] [Accepted: 09/15/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVE Although recommended for the treatment of acute heart failure (AHF), the use of intravenous (IV) nitroglycerin (NTG) is supported by scarce and contradicting evidence. In the current analysis, we have assessed the impact of IV NTG administration by EMS or in emergency department (ED) on outcomes of AHF patients. METHODS We analyze AHF patients included by 45 hospitals that were delivered to ED by EMS. Patients were grouped according to whether treatment with IV NTG was started by EMS before ED admission (preED-NTG), during the ED stay (ED-NTG) or were untreated with IV NTG (no-NTG, control group). In-hospital, 30-day and 365-day all-cause mortality, prolonged hospitalization (>7 days) and 90-day post-discharge combined adverse events (ED revisit, hospitalization or death) were compared in EMS-NTG and ED-NTG respect to control group. RESULTS We included 8424 patients: preED-NTG = 292 (3.5%), ED-NTG = 1159 (13.8%) and no-NTG = 6973 (82.7%). preED-NTG group had the most severely decompensated cases of AHF (p < 0.001) but it had lower in-hospital (OR = 0.724, 95%CI = 0.459-1.114), 30-day (HR = 0.818, 0.576-1.163) and 365-day mortality (HR = 0.692, 0.551-0.869) and 90-day post-discharge events (HR = 0.795, 0.643-0.984) than control group. ED-NTG group had mortalities similar to control group (in-hospital: OR = 1.164, 0.936-1.448; 30-day: HR = 0.980, 0.819-1.174; 365-day: HR = 0.929, 0.830-1.039) but significantly decreased 90-day post-discharge events (HR = 0.870, 0.780-0.970). Prolonged hospitalization rate did not differ among groups. Five different analyses confirmed these findings. CONCLUSIONS Early prehospital IV NTG administration was associated with lower mortality and post-discharge events, while IV NTG initiated in ED only improved post-discharge event rate. Further studies are needed to assess the role of early prehospital administration of IV NTG to patients with AHF.
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Affiliation(s)
- Òscar Miró
- Emergency Department, Hospital Clinic, Institut d'Investigació Biomèdica August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain; The GREAT (Global Research in Acute Contditions Team) Network, Via Antonio Serra 54, 00191, Roma, Italy.
| | - Pere Llorens
- Emergency Department, Short-Stay Unit and Home Hospitalization, Hospital General de Alicante, Spain
| | - Yonathan Freund
- Emergency Department, Hôpital Pitié-Salpêtrière, Assistance Publique - Hôpitaux 18 de Paris (APHP), Sorbonne Université, Paris, France
| | - Beth Davison
- Momentum Research, Inc., Durham, NC, USA; INSERM U-942 (Biotherapy in the critically ill), Paris, France
| | - Koji Takagi
- Momentum Research, Inc., Durham, NC, USA; INSERM U-942 (Biotherapy in the critically ill), Paris, France
| | | | - Javier Jacob
- Emergency Department, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Catalonia, Spain
| | - Francisco Javier Martín-Sánchez
- Emergency Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos (IdISSC), Universidad Complutense de Madrid, Madrid, Spain
| | - Víctor Gil
- Emergency Department, Hospital Clinic, Institut d'Investigació Biomèdica August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain
| | - Xavier Rosselló
- Cardiology Department, Health Research Institute of the Balearic Islands (IdISBa), Hospital Universitari Son Espases, Palma, Spain; Centro Nacional de Investigaciones Cardiovasculares (CNIC), Spain
| | - Aitor Alquézar-Arbé
- Emergency Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Catalonia, Spain
| | | | - Josep Masip
- Consultant Research Direction, University of Barcelona, Catalonia, Spain
| | - Alexandre Mebazaa
- The GREAT (Global Research in Acute Contditions Team) Network, Via Antonio Serra 54, 00191, Roma, Italy; INSERM U-942 (Biotherapy in the critically ill), Paris, France; Department of Anaesthesiology and Critical Care Medicine, AP-HP, Saint Louis and Lariboisière University Hospitals, Paris, France
| | - Gad Cotter
- Momentum Research, Inc., Durham, NC, USA; INSERM U-942 (Biotherapy in the critically ill), Paris, France
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Forssell C, Bjarnegård N, Nyström FH. A Pilot Study of Perioperative External Circumferential Cryoablation of Human Renal Arteries for Sympathetic Denervation. Vasc Specialist Int 2020; 36:151-157. [PMID: 32868486 PMCID: PMC7531304 DOI: 10.5758/vsi.200023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/11/2020] [Accepted: 07/26/2020] [Indexed: 12/25/2022] Open
Abstract
Purpose Cryoablation, which induces cellular death without extensive tissue damage, has been extensively used to denervate the myocardium. However, periadventitial external circumferential application of cryotherapy to denervate the renal artery sympathetic nerves has, to our knowledge, never been tested in humans. The main aim of this study was to examine the safety and potential effects of cryotherapy on ambulatory blood pressure levels and other outcomes that are indirectly related to sympathetic tone, including pulse-wave velocity, central pulse pressure, and glucose levels. Materials and Methods Five patients who underwent the denervation of the renal arteries during open surgery of the abdominal aortic aneurysm and four controls who did not undergo denervation during the surgery were enrolled. An argon-powered cryotherapy catheter (Cardioblate; Medtronic Inc., USA) was applied periadventitially to each renal artery in the five patients and then activated by infusion with liquid nitrogen for 1 minute. Results No cryoablation-related complications occurred in the five consecutive patients. Their ambulatory blood pressures 3 to 5 months after surgery did not demonstrate any general blood pressure-reducing effects, but two patients responded favorably with the reduction of antihypertensive medication and decreased 24-hour blood pressure. The patients’ mean HbA1C levels decreased from 5.9±0.78% to 5.6±0.71% (P=0.042). Conclusion This pilot study suggests that periadventitial cryoablation during open surgery can be used in the study of renal denervation in humans, as it had no complications in five patients in this study. The effectiveness of cryoablation for treating hypertension should be proven in a phase II clinical trial.
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Affiliation(s)
- Claes Forssell
- Departments of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Niclas Bjarnegård
- Departments of Health, Medicine and Caring Sciences, Faculty of Medicine and Health Sciences, Linköping University, Linköping, Sweden
| | - Fredrik H Nyström
- Departments of Health, Medicine and Caring Sciences, Faculty of Medicine and Health Sciences, Linköping University, Linköping, Sweden
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Thadani U. Challenges with nitrate therapy and nitrate tolerance: prevalence, prevention, and clinical relevance. Am J Cardiovasc Drugs 2014; 14:287-301. [PMID: 24664980 DOI: 10.1007/s40256-014-0072-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nitrate therapy has been an effective treatment for ischemic heart disease for over 100 years. The anti-ischemic and exercise-promoting benefits of sublingually administered nitrates are well established. Nitroglycerin is indicated for the relief of an established attack of angina and for prophylactic use, but its effects are short lived. In an effort to increase the duration of beneficial effects, long-acting orally administered and topical applications of nitrates have been developed; however, following their continued or frequent daily use, patients soon develop tolerance to these long-acting nitrate preparations. Once tolerance develops, patients begin losing the protective effects of the long-acting nitrate therapy. By providing a nitrate-free interval, or declining nitrate levels at night, one can overcome or reduce the development of tolerance, but cannot provide 24-h anti-anginal and anti-ischemic protection. In addition, patients may be vulnerable to occurrence of rebound angina and myocardial ischemia during periods of absent nitrate levels at night and early hours of the morning, and worsening of exercise capacity prior to the morning dose of the medication. This has been a concern with nitroglycerin patches but not with oral formulations of isosorbide-5 mononitrates, and has not been adequately studied with isosorbide dinitrate. This paper describes problems associated with nitrate tolerance, reviews mechanisms by which nitrate tolerance and loss of efficacy develop, and presents strategies to avoid nitrate tolerance and maintain efficacy when using long-acting nitrate formulations.
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Affiliation(s)
- Udho Thadani
- Emeritus Professor of Medicine, University of Oklahoma Health Sciences Center, Consultant Cardiologist, Oklahoma University Medical Center and VA Medical Center, 920 Stanton L. Young Blvd., WP 3010, Oklahoma City, OK, 73104, USA,
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Gupta D, Georgiopoulou VV, Kalogeropoulos AP, Marti CN, Yancy CW, Gheorghiade M, Fonarow GC, Konstam MA, Butler J. Nitrate therapy for heart failure: benefits and strategies to overcome tolerance. JACC-HEART FAILURE 2013; 1:183-91. [PMID: 24621868 DOI: 10.1016/j.jchf.2013.03.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 03/04/2013] [Indexed: 11/18/2022]
Abstract
Combination therapy with hydralazine and nitrates can improve outcomes in patients with heart failure and low ejection fraction. However, this combination is underused in clinical practice for several reasons, including side effects related to hydralazine and polypharmacy. Some of the benefits seen with hydralazine, including afterload reduction and attenuation of nitrate tolerance, have also been observed with angiotensin-converting enzyme inhibitors. Demonstrating similar clinical benefits with nitrates plus angiotensin-converting enzyme inhibitor therapy alone, in the absence of hydralazine, may represent an opportunity to improve heart failure care by increasing the use of nitrates. In this paper, we summarize data that support studying such an approach.
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Affiliation(s)
- Divya Gupta
- Division of Cardiology, Emory University, Atlanta, Georgia
| | | | | | | | - Clyde W Yancy
- Division of Cardiology, Northwestern University, Chicago, Illinois
| | | | - Gregg C Fonarow
- Division of Cardiology, University of California, Los Angeles, California
| | | | - Javed Butler
- Division of Cardiology, Emory University, Atlanta, Georgia.
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Page NA, Fung HL. Organic nitrate metabolism and action: toward a unifying hypothesis and the future-a dedication to Professor Leslie Z. Benet. J Pharm Sci 2013; 102:3070-81. [PMID: 23670666 DOI: 10.1002/jps.23550] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 03/20/2013] [Accepted: 03/26/2013] [Indexed: 12/23/2022]
Abstract
This review summarizes the major advances that had been reported since the outstanding contributions that Professor Benet and his group had made in the 1980s and 1990s concerning the metabolism and pharmacologic action of organic nitrates (ORNs). Several pivotal studies have now enhanced our understanding of the metabolism and the bioactivation of ORNs, resulting in the identification of a host of cysteine-containing enzymes that can carry out this function. Three isoforms of aldehyde dehydrogenase, all of which with active catalytic cysteine sites, are now known to metabolize, somewhat selectively, various members of the ORN family. The existence of a long-proposed but unstable thionitrate intermediate from ORN metabolism has now been experimentally observed. ORN-induced thiol oxidation in multiple proteins, called the "thionitrate oxidation hypothesis," can be used not only to explain the phenomenon of nitrate tolerance, but also the various consequences of chronic nitrate therapy, namely, rebound vasoconstriction, and increased morbidity and mortality. Thus, a unifying biochemical hypothesis can account for the myriad of pharmacological events resulting from nitrate therapy. Optimization of the future uses of ORN in cardiology and other diseases could benefit from further elaboration of this unifying hypothesis.
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Affiliation(s)
- Nathaniel A Page
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, New York 14214, USA
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Organic nitrates and nitrate resistance in diabetes: the role of vascular dysfunction and oxidative stress with emphasis on antioxidant properties of pentaerithrityl tetranitrate. EXPERIMENTAL DIABETES RESEARCH 2010; 2010:213176. [PMID: 21234399 PMCID: PMC3014692 DOI: 10.1155/2010/213176] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Accepted: 11/01/2010] [Indexed: 12/20/2022]
Abstract
Organic nitrates represent a class of drugs which are clinically used for treatment of ischemic symptoms of angina as well as for congestive heart failure based on the idea to overcome the impaired NO bioavailability by “NO” replacement therapy. The present paper is focused on parallels between diabetes mellitus and nitrate tolerance, and aims to discuss the mechanisms underlying nitrate resistance in the setting of diabetes. Since oxidative stress was identified as an important factor in the development of tolerance to organic nitrates, but also represents a hallmark of diabetic complications, this may represent a common principle for both disorders where therapeutic intervention should start. This paper examines the evidence supporting the hypothesis that pentaerithrityl tetranitrate may represent a nitrate for treatment of ischemia in diabetic patients. This evidence is based on the considerations of parallels between diabetes mellitus and nitrate tolerance as well as on preliminary data from experimental diabetes studies.
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Daiber A, Münzel T, Gori T. Organic nitrates and nitrate tolerance--state of the art and future developments. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2010; 60:177-227. [PMID: 21081219 DOI: 10.1016/b978-0-12-385061-4.00007-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The hemodynamic and antiischemic effects of nitroglycerin (GTN) are lost upon chronic administration due to the rapid development of nitrate tolerance. The mechanism of this phenomenon has puzzled several generations of scientists, but recent findings have led to novel hypotheses. The formation of reactive oxygen and nitrogen species in the mitochondria and the subsequent inhibition of the nitrate-bioactivating enzyme mitochondrial aldehyde dehydrogenase (ALDH-2) appear to play a central role, at least for GTN, that is, bioactivated by ALDH-2. Importantly, these findings provide the opportunity to reconcile the two "traditional" hypotheses of nitrate tolerance, that is, the one postulating a decreased bioactivation and the concurrent one suggesting a role of oxidative stress. Furthermore, recent animal and human experimental studies suggest that the organic nitrates are not a homogeneous group but demonstrate a broad diversity with regard to induction of vascular dysfunction, oxidative stress, and other side effects. In the past, attempts to avoid nitrate-induced side effects have focused on administration schedules that would allow a "nitrate-free interval"; in the future, the role of co-therapies with antioxidant compounds and of activation of endogeneous protective pathways such as the heme oxygenase 1 (HO-1) will need to be explored. However, the development of new nitrates, for example, tolerance-free aminoalkyl nitrates or combination of nitrate groups with established cardiovascular drugs like ACE inhibitors or AT(1)-receptor blockers (hybrid molecules) may be of great clinical interest.
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Affiliation(s)
- Andreas Daiber
- II. Medizinische Klinik, Labor für Molekulare Kardiologie und Abteilung für Kardiologie und Angiologie, Universitätsmedizin der Johannes-Gutenberg-Universität, Mainz, Germany
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Tsou PS, Addanki V, Fung HL. Dissociation between superoxide accumulation and nitroglycerin-induced tolerance. J Pharmacol Exp Ther 2008; 327:97-104. [PMID: 18653825 DOI: 10.1124/jpet.108.138784] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
We hypothesize that superoxide (O(2)(*-)) accumulation is not a crucial causative factor in inducing nitroglycerin (NTG) tolerance. In LLC-PK1 cells, pre-exposure to NTG resulted in increased O(2)(*-) accumulation and reduced cGMP response to NTG versus vehicle control. O(2)(*-) stimulated by NTG was reduced by oxypurinol (100 microM), a xanthine oxidase inhibitor. Exposure to angiotensin II (Ang II) increased O(2)(*-) but did not reduce cGMP response. The O(2)(*-) scavenger tiron reduced Ang II-induced O(2)(*-) production but did not increase NTG-stimulated cGMP production. Using p47(phox-/-) and gp91(phox-/-) mice versus their respective wild-type controls (WT), we showed that aorta from mice null of these critical NADPH oxidase subunits exhibited similar vascular tolerance after NTG dosing (20 mg/kg s.c., t.i.d. for 3 days), as indicated by their ex vivo pEC(50) and cGMP accumulation upon NTG challenge. In vitro aorta O(2)(*-) production was enhanced by NTG incubation in both p47(phox) null and WT mice. Pre-exposure of isolated mice aorta to 100 microM NTG for 1 h resulted in vascular tolerance toward NTG and increased O(2)(*-) accumulation. Oxypurinol (1 mM) reduced O(2)(*-) but did not attenuate vascular tolerance. These results suggest that O(2)(*-) does not initiate either in vitro and in vivo NTG tolerance, and that the p47(phox) and gp91(phox) subunits of NADPH oxidase are not critically required. Increased O(2)(*-) accumulation may be an effect, rather than an initiating cause, of NTG tolerance.
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Affiliation(s)
- Pei-Suen Tsou
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, NY 14260-1200, USA
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Longobardi G, Ferrara N, Leosco D, Abete P, Furgi G, Cacciatore F, Corbi G, Pescatore R, Rengo F. Angiotensin II-Receptor Antagonist Losartan Does not Prevent Nitroglycerin Tolerance in Patients with Coronary Artery Disease. Cardiovasc Drugs Ther 2004; 18:363-70. [PMID: 15717138 DOI: 10.1007/s10557-005-5060-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The study evaluated the effect of Losartan in preventing nitrate tolerance during continuous transdermal nitroglycerin (TD-GTN) therapy in patients with coronary disease. Fifteen subjects with chronic stable ischemia evaluated by exercise test, were randomized to 28 days of TD-GTN 20 mg once a day without free interval plus Losartan 100 mg or Losartan-placebo with a double blind crossover design. Myocardial ischemic parameters during stress test were evaluated after each test period and results of Losartan therapy were compared to those with placebo. Time to onset 1 mm ST-depression was significantly higher after acute TD-GTN 20 mg with respect to placebo run-in, sustained TD-GTN 20 mg plus Losartan 100 mg or Losartan-placebo (p < 0.001). ST-depression at peak exercise and time to recovery of ST segment were markedly lower after acute TD-GTN 20 mg compared to placebo run-in (p < 0.05), sustained TD-GTN 20 mg plus Losartan 100 mg (p < 0.001) or Losartan-placebo (p < 0.05). At 1 mm-ST depression and at peak exercise, systolic blood pressure and rate-pressure product significantly decreased after sustained TD-GTN 20 mg plus Losartan 100 mg (p < 0.001, p < 0.05 respectively) with respect to placebo run-in, acute and sustained TD-GTN 20 mg plus Losartan-placebo. Moreover at peak exercise, these data were also observed after acute TD-GTN 20 mg compared to placebo run-in and sustained TD-GTN 20 mg plus Losartan-placebo (p < 0.001). The AT(1) antagonist Losartan administration does not prevent the development of nitrate tolerance during continuous TD-GTN therapy.
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Affiliation(s)
- Giancarlo Longobardi
- Division of Cardiology, Fondazione Salvatore Maugeri, IRCCS Scientific Institute of Telese Terme, Via Bagni Vecchi, 82037 Telese Termi, Italy.
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Thadani U. Prevention of Nitrate Tolerance with Angiotensin II Receptor Type 1 Blocker in Patients with Stable Angina: Yet Another Failed Strategy to Prevent Tolerance. Cardiovasc Drugs Ther 2004; 18:339-42. [PMID: 15717134 DOI: 10.1007/s10557-005-5056-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Fayers KE, Cummings MH, Shaw KM, Laight DW. Nitrate tolerance and the links with endothelial dysfunction and oxidative stress. Br J Clin Pharmacol 2004; 56:620-8. [PMID: 14616421 PMCID: PMC1884304 DOI: 10.1046/j.1365-2125.2003.01946.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Identification of nitric oxide as the molecule responsible for endothelial dependant vasodilatation has led to an explosion of interest in endothelial function. Oxidative stress has been identified as an important factor in the development of tolerance to organic nitrates. This review examines the evidence supporting this recently developed theory and how mechanisms of nitrate tolerance may link with the wider picture of primary nitric oxide resistance.
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Affiliation(s)
- Katherine E Fayers
- Academic Department of Diabetes and Endocrinology, Queen Alexandra Hospital, Southwick Road, Cosham, Portsmouth, Hants, PO6 3LY, UK.
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Perings SM, Grubert N, Kleinbongard P, Reinecke P, Schulz R, Hermsen D, Willers R, Kelm M. Chronic treatment with fluvastatin improves smooth muscle dilatory function in genetically determined hyperlipoproteinemia. J Cardiovasc Pharmacol 2004; 43:183-90. [PMID: 14716204 DOI: 10.1097/00005344-200402000-00004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We hypothesized that the HMG-CoA reductase inhibitor fluvastatin, does not only improve endothelium-dependent vasorelaxation, but that it also increases vascular smooth muscle reactivity in hyperlipoproteinemia. New Zealand White (NZW) rabbits aged 37 weeks (control), Watanabe Heritable Hyperlipidemic rabbits (WHHL) aged 37 weeks, and WHHL aged 35 weeks with fluvastatin treatment of 17 weeks (10 mg/kg/d) were examined. Aortas were isolated for isometric tension recording. Both endothelium-dependent and independent relaxation were impaired in WHHL. Fluvastatin significantly restored impaired endothelium-independent relaxation (WHHL: 57 +/- 12 versus WHHL+ fluvastatin: 150 +/- 22%; P < 0.05) and in tendency endothelium-dependent relaxation (WHHL: 26 +/- 5 versus WHHL+ fluvastatin: 83 +/- 29%; (P = 0.07)). In parallel, fluvastatin restored nitrite plasma level in hyperlipoproteinemic animals (WHHL: 480 (13-3821) versus WHHL+ fluvastatin: 808 (467-1595) nmol; P < 0.05). Thus, chronic treatment with fluvastatin not only improves endothelial but also vascular smooth muscle function in hyperlipoproteinemia, which may contribute to the beneficial clinical effects of statins.
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Affiliation(s)
- Stefan Martin Perings
- Department of Medicine, Division of Cardiology, Pulmonary Disease, and Angiology, Heinrich Heine University, Düsseldorf, Germany.
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Elliott WJ. Therapeutic trials comparing angiotensin converting enzyme inhibitors and angiotensin II receptor blockers. Curr Hypertens Rep 2000; 2:402-11. [PMID: 10981176 DOI: 10.1007/s11906-000-0045-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two independent pharmacologic methods of specifically interfering with the renin-angiotensin-aldosterone system have been brought to the marketplace: angiotensin converting enzyme (ACE) inhibitors and angiotensin II receptor blockers (ARBs). These agents have the potential not only to be very widely used for a broad variety of clinical indications but also to compete against each other as treatments for hypertension, heart failure, renal impairment, and other conditions. Many short-term comparative studies of these two classes of drugs have now been completed. Most have focused on surrogate endpoints, such as blood pressure, renal function, or cough. These studies have generally concluded that ARBs are better tolerated but that the two drug classes otherwise have similar efficacy. The largest clinical trial comparing ARBs and ACE inhibitors thus far completed, Evaluation of Losartan in the Elderly (ELITE 2), failed to confirm the results of a smaller study; it did not demonstrate a significant improvement in outcomes (death or hospitalization for heart failure) with an ARB used alone, despite better tolerability. Many longer-term outcome studies with survival endpoints are under way, but most will compare the combination against an ACE inhibitor alone. These studies will define the optimal use of these agents in medicine for decades to come.
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Affiliation(s)
- W J Elliott
- Department of Preventive Medicine, Rush Medical College of Rush University, 1700 West Van Buren Street, Suite 470, Chicago, IL 60612, USA.
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