© 2000 American Heart Association, Inc.
Editorials |
Physiological Effects of Peroxynitrite
Potential Products of the Environment
From the Cardiothoracic Research Laboratory, Division of Cardiothoracic Surgery, Carlyle Fraser Heart Center of Emory University, Atlanta, Ga.
Correspondence to Jakob Vinten-Johansen, PhD, Cardiothoracic Research Laboratory, Division of Cardiothoracic Surgery, Carlyle Fraser Heart Center of Emory University, 550 Peachtree St NE, Atlanta, GA 30365-2225. E-mail jvinten{at}emory.edu
Key Words: nitric oxide • cardioprotection • endothelium • contractile function
 |
Introduction |
|---|
 Top Introduction References |
|---|
Peroxynitrite is a potent oxidant formed from the reaction between superoxide radicals and NO in a one-to-one stoichiometry. This reaction occurs at 6.7x109 mol/L-1 · s-1,1 and it is essentially irreversible because of its highly exothermic nature. Therefore, the reaction is diffusion-limited, and it out-competes the reaction of superoxide dismutase for superoxide radicals, which proceeds at a rate of 2x109 mol/L-1 · s-1. A key regulator of peroxynitrite production is the concentration of NO, and the reaction proceeds when the concentration of NO increases and can overcome dismutation by superoxide dismutase. This situation occurs when NO achieves micromolar concentrations as when there is a burst of NO production during ischemia/reperfusion and when NO is produced by cytokine-stimulated inducible NO synthase (iNOS) activity. The toxic effect of ONOO- and its protonated form, peroxynitrous acid, may stem from its oxidation of zinc fingers, protein thiols, membrane lipids, and iron and sulfur clusters of biological molecules. In addition, hydroxyl-like and nitrogen dioxide radicals are produced by homolytic cleavage, increasing the potential for oxidant-mediated tissue injury. Intermediates are also formed from the heterolytic cleavage of ONOO- to hydroxyl anion and nitronium ion (NO2+), catalyzed by the transition metal centers of superoxide dismutase and myeloperoxidase. The nitration of protein tyrosine residues gives rise to 3-nitrotyrosine, which is frequently used as an assay for ONOO- in tissues, blood, and perfusates.
Like NO, peroxynitrite has been associated with both deleterious and beneficial effects. An advantage of the oxidant-mediated deleterious effects of peroxynitrite is that it has been suggested to contribute to the host-defense response to bacterial invasion. Both neutrophils and macrophages produce peroxynitrite by the rapid biradical reaction between NO and superoxide anions generated simultaneously from those cells.2 However, oxidant injury is also a primary mechanism of myocardial dysfunction and infarction, and several studies have implicated peroxynitrite as a major cause of injury in the heart subjected to ischemia/reperfusion or cytokines. Liu et al3 demonstrated that NO and superoxide anions and the production of peroxynitrite were elevated in the ischemic-reperfused heart in vivo, which at least places peroxynitrite at the scene of the injury and is a prerequisite for suggesting that it participates in deleterious actions on tissue.
The study by Ferdinandy et al4 in this issue of
Circulation Research demonstrates that the
production of peroxynitrite (and the substrates NO and
superoxide anion) is contributory to the cardiodepressant effects of
the proinflammatory cytokines interleukin-1ß, interferon-
,
and tumor necrosis factor-
. This study correlated the temporal
appearance of peroxynitrite with cytokine-induced
contractile dysfunction, the latter of which was reversed by
attenuating the production of either of peroxynitrite’s
precursors, NO (by L-nitroarginine) or superoxide
anion (by titron). In addition, the degradation of peroxynitrite using
5,10,15,20-tetrakis-(4-sulfonatophenyl)-porphyrinato-iron(III), a
catalyst of peroxynitrite decomposition to nitrate, attenuated
cytokine-induced cardiodepression and decreased
perfusate nitrotyrosine levels, used as a surrogate measure of
peroxynitrate. The depressed cardiac function induced by peroxynitrite
may be related to a decrease in cardiac efficiency.5
The authors concluded that peroxynitrite promotes myocardial
contractile dysfunction ostensibly secondary to its oxidant effects or
alternatively to nitration of important contractile proteins.
The central thesis of the study by Ferdinandy et al4 relies on the endogenous production of peroxynitrite from superoxide anion and NO stimulated by the mixture of cytokines. The authors verified that the substrates for peroxynitrite were, indeed, generated by measuring the presence of superoxide anions and NO in ventricular tissue. They also removed the substrates of peroxynitrite using an appropriate inhibitor of NOS and scavenger of superoxide anion. They additionally showed that xanthine oxidoreductase and NAD(P)H oxidoreductase were sources of superoxide anions, and increased iNOS activity was associated with the increased generation of NO. Measuring the end product, peroxynitrite, is more problematic in that it cannot be measured directly, and the surrogate measures of nitrotyrosine footprints and dityrosine used by Ferdinandy et al4 are not uniquely specific for peroxynitrite.6 Nitrotyrosine and dityrosine were measured in perfusate rather than in tissue. Alternative methods (ie, oxidation of dihydrorhodamine-123) also have limitations in that there may be significant interference with biological molecules. Tyrosine residues can be nitrated by other nitrogen-centered oxidants, but this requires relatively high concentrations. Myeloperoxidase activity can form nitrotyrosine possibly by oxidation of nitrite to NO2·. However, myeloperoxidase activity likely is not important in the isolated buffer-perfused heart devoid of neutrophils. Hence, the most likely source of nitrotyrosine residues is peroxynitrite. The concomitant measurement of nitrotyrosine and dityrosine (the latter formed from biradical reaction between two tyrosyl radicals) may increase the confidence that the indirect measures of peroxynitrite generation represent the physiological appearance and relative concentrations in perfusate.
In contrast to the reports of the cardiotoxic effects of peroxynitrite by Ferdinandy et al4 and others, numerous studies report apparent cardioprotective effects of peroxynitrite. Nossuli et al7 showed in a feline model of coronary occlusion and reperfusion that intraventricular infusion of authentic peroxynitrite (1 µmol/L) 10 minutes before reperfusion was associated with a reduction in infarct size and attenuation of endothelial function in ischemic-reperfused coronary arteries assayed by vasorelaxation responses to acetylcholine and by reduced ex vivo adherence of unstimulated neutrophils to the endothelial surface of postischemic coronary arteries. In addition, authentic peroxynitrite attenuated adherence of neutrophils to normal coronary artery endothelium stimulated by thrombin. In addition, Lefer et al8 reported that peroxynitrite attenuated neutrophils rolling along in vivo mesenteric venules. In a subsequent study, Nossuli et al9 demonstrated that the physiological effects of peroxyniutrite are dependent on its concentration; at either 0.2 or 20 µmol/L concentrations of intraventricular infusion of peroxynitrite, the cardioprotection observed at 2 µmol/L was not apparent. This concentration-dependent effect is in agreement with the study by Schulz et al,5 in which cardiodepression was observed with infusion of 40 but not 4 µmol/L peroxynitrite in isolated rat hearts.
The sensitivity of cardiac tissue to concentration-dependent actions of peroxynitrite may explain, in part, the presence or lack of physiological effects, but it cannot explain the dichotomous effects reported in the literature, that is, cardiotoxicity as opposed to cardioprotection. However, insight into this issue was provided in a study by Ma et al,10 which indicated that the physiological effects of peroxynitrite on myocardium depended on the type of environment adopted for the experiment, for example, the presence of a crystalloid or biological (ie, blood) environment. In the study by Ma et al,10 the peroxynitrite generator Sin-1 exerted cardiodepression in isolated rat hearts perfused with crystalloid buffer, whereas, in sharp contrast, it was cardioprotective in a blood-perfused environment. Similar results were reported by Ronson et al11 in a model of cardiac surgery in which a canine heart was subjected to 30 minutes of global ischemia followed by 1 hour of myocardial protection with either crystalloid cardioplegia or blood cardioplegia in the absence or presence of 5 µmol/L authentic peroxynitrite. After blood reperfusion of the hearts off bypass, the hearts receiving crystalloid cardioplegia containing peroxynitrite showed significantly depressed contractile function and elevated creatine kinase activity compared with crystalloid cardioplegia solution without peroxynitrite (but otherwise identical in composition). In contrast, peroxynitrite in the blood cardioplegia solution was associated with better recovery of postischemic ventricular systolic function and lower creatine kinase activity than its blood cardioplegia counterpart not containing peroxynitrite. Postischemic coronary artery endothelial function (not reported) was significantly worse in the crystalloid solution containing peroxynitrite, whereas it was better in the peroxytnitrite-containing blood solution. Hence, these data support the notion put forth by Ma et al10 that the physiological effects of peroxynitrite can vary dramatically depending on the environment of the exposure.
A review of the literature suggests that the effects of peroxynitrite on the myocardium do show a dependency on the environment in which the anion is present. Studies demonstrating a deleterious effect were largely conducted in crystalloid media,5 12 13 14 including the study by Ferdinandy et al.4 In contrast, the studies reporting cardioprotective effects of peroxynitrite were conducted largely in in vivo systems (ie, blood-perfused environments).7 8 9 11 15 One interpretation is that there is some component of blood that attenuates the toxic effect of peroxynitrite. Glutathione is a major component of blood, being in plasma and highly concentrated in red blood cells. Glutathione reacts with peroxynitrite to form NO, nitrosoglutathione, or a similar nitrosothiol that demonstrates vasorelaxant effects,16 which are inhibitable by hemoglobin and methylene blue, a conventional scavenger of NO and inhibitor of guanylyl cyclase activity, respectively. Nossuli et al9 observed an increase in S-nitrosoglutathione when peroxynitrite was coincubated with reduced glutathione. Moro et al17 demonstrated that glutathione could reverse the proaggregatory effects of peroxynitrite on washed platelets in buffer and that the buffer containing glutathione showed measurable NO and S-nitrosoglutathione in concentrations sufficient to account for attenuation of platelet aggregation. Furthermore, Nakamura et al15 noted that the deleterious effects of peroxynitrite in crystalloid cardioplegia solution were largely reversed with the addition of 500 µmol/L glutathione. Hence, the presence of glutathione may prevent the accumulation of peroxynitrite to toxic levels and may convert peroxynitrite to secondary products with cardioprotective properties.
In the study by Ferdinandy et at,4 the lack of glutathione or other thiol-containing molecules in the crystalloid perfusate may have allowed peroxynitrite to accumulate to toxic levels in the myocardium and, in turn, exert oxidant or nitration effects. The cytokine-stimulated generation of peroxynitrite by the myocardium and associated cardiac depression were clearly shown and supported under the ex vivo conditions used in the experiment. However, these results should be considered within the context of the preparation in which they were obtained.
|
Footnotes |
|---|
The opinions expressed in this editorial are not necessarily those of the editors or of the American Heart Association.
|
References |
|---|
|
TopIntroductionReferences |
|---|
- Koppenol WH. The basic chemistry of nitrogen monoxide and peroxynitrite. Free Radic Biol Med. 1998;25:385–391. Review.[Medline] [Order article via Infotrieve]
- Ischiropoulos H, Zhu L, Beckman JS. Peroxynitrite formation from macrophage-derived nitric oxide. Arch Biochem Biophys. 1992;298:446–451.[Medline] [Order article via Infotrieve]
-
Liu P, Hock CE, Nagele R, Wong PYK. Formation of
nitric oxide, superoxide, and peroxynitrite in myocardial
ischemia-reperfusion injury in rats. Am J
Physiol. 1997;272:H2327–H2336.
[Abstract/Free Full Text] -
Ferdinandy P, Danial H, Ambrus I, Rothery RA, Schulz
R. Peroxynitrite is a major contributor to cytokine-induced
myocardial contractile failure. Circ Res. 2000;87:241–247.
[Abstract/Free Full Text] -
Schulz R, Dodge KL, Lopaschuk GD, Clanachan AS.
Peroxynitrite impairs cardiac contractile function by decreasing
cardiac efficiency. Am J Physiol. 1997;272:H1212–H1219.
[Abstract/Free Full Text] - Halliwell B. What nitrates tyrosine? Is nitrotyrosine specific as a biomarker of peroxynitrite formation in vivo? FEBS Lett. 1997;411:157–160.[Medline] [Order article via Infotrieve]
-
Nossuli TO, Hayward R, Scalia R, Lefer AM.
Peroxynitrite reduces myocardial infarct size and preserves
coronary endothelium after ischemia and
reperfusion in cats. Circulation. 1997;96:2317–2324.
[Abstract/Free Full Text] - Lefer DJ, Scalia R, Campbell B, Nossuli TO, Hayward R, Salamon M, Grayson J, Lefer AM. Peroxynitrite inhibits leukocyte-endothelial cell interactions and protects against ischemia-reperfusion injury in rats. J Clin Invest. 1997;99:684–691.[Medline] [Order article via Infotrieve]
-
Nossuli TO, Hayward R, Jensen D, Scalia R, Lefer AM.
Mechanisms of cardioprotection by peroxynitrite in myocardial
ischemia and reperfusion injury. Am J Physiol. 1998;275:H509–H519.
[Abstract/Free Full Text] -
Ma X-L, Gao F, Lopez BL, Christopher TA,
Vinten-Johansen J. Peroxynitrite, a two-edged sword in
post-ischemic myocardial injury-dichotomy of action in
crystalloid-versus blood-perfused hearts. J Pharmacol Exp
Ther. 2000;292:912–920.
[Abstract/Free Full Text] - Ronson RS, Thourani VH, Ma X-L, Katzmark S, Han D, Zhao Z-Q, Nakamura M, Guyton RA, Vinten-Johansen J. Peroxynitrite, the breakdown product of nitric oxide, is beneficial in blood cardioplegia but injurious in crystalloid cardioplegia. Circulation. 1999;100(suppl II):II-384–II-391.
-
Yasmin W, Strynadka KD, Schulz R. Generation of
peroxynitrite contributes to ischemia-reperfusion injury in
isolated rat hearts. Cardiovasc Res. 1997;33:422–432.
[Abstract/Free Full Text] -
Ma X-L, Lopez BL, Liu G-L, Christopher TA,
Ischiropoulos H. Peroxynitrite aggravates myocardial reperfusion injury
in the isolated perfused rat heart. Cardiovasc Res. 1997;36:195–204.
[Abstract/Free Full Text] - Lopez BL, Liu G-L, Christopher TA, Ma X-L. Peroxynitrite, the product of nitric oxide and superoxide, causes myocardial injury in the isolated perfused rat heart. Coron Artery Dis. 1997;8:149–153.[Medline] [Order article via Infotrieve]
- Nakamura M, Thourani VH, Ronson RS, Velez D, Ma X-L, Katzmark S, Robinson J, Schmarkey LS, Zhao Z-Q, Wang N-P, Guyton RA, Vinten-Johansen J. Glutathione reverses endothelial damage from peroxynitrite, the by-product of nitric oxide degradation, in crystalloid cardioplegia. Circulation. In press.
-
Wu M, Pritchard KA Jr, Kaminski PM, Fayngersh RP,
Hintze TH, Wolin MS. Involvement of nitric oxide and nitrosothiols in
relaxation of pulmonary arteries to peroxynitrite.
Am J Physiol. 1994;266:H2108–H2113.
[Abstract/Free Full Text] -
Moro MA, Darley-Usmar VM, Goodwin DA, Read NG,
Zamora-Pino R, Feelisch M, Radomski MW, Moncada S. Paradoxical fate and
biological action of peroxynitrite on human platelets. Proc
Natl Acad Sci U S A. 1994;91:6702–6706.
[Abstract/Free Full Text]
This article has been cited by other articles:
 |
|
 |
|
  F. Cosentino, P. Francia, G. G. Camici, P. G. Pelicci, M. Volpe, and T. F. Luscher Final Common Molecular Pathways of Aging and Cardiovascular Disease: Role of the p66Shc Protein Arterioscler. Thromb. Vasc. Biol., April 1, 2008; 28(4): 622 - 628. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. G. Neilan, S. L. Blake, F. Ichinose, M. J. Raher, E. S. Buys, D. S. Jassal, E. Furutani, T. M. Perez-Sanz, A. Graveline, S. P. Janssens, et al. Disruption of Nitric Oxide Synthase 3 Protects Against the Cardiac Injury, Dysfunction, and Mortality Induced by Doxorubicin Circulation, July 31, 2007; 116(5): 506 - 514. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 C. Gaitanaki, T. Kalpachidou, I.-K. S. Aggeli, P. Papazafiri, and I. Beis CoCl2 induces protective events via the p38-MAPK signalling pathway and ANP in the perfused amphibian heart J. Exp. Biol., July 1, 2007; 210(13): 2267 - 2277. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. Hu, X. Jiao, E. Gao, W. J. Koch, S. Sharifi-Azad, Z. Grunwald, X. L. Ma, and J.-Z. Sun Chronic beta-Adrenergic Receptor Stimulation Induces Cardiac Apoptosis and Aggravates Myocardial Ischemia/Reperfusion Injury by Provoking Inducible Nitric-Oxide Synthase-Mediated Nitrative Stress J. Pharmacol. Exp. Ther., August 1, 2006; 318(2): 469 - 475. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A Elfatih, N R Anderson, S Mansoor, S Ahmed, R Horton, M R Holland, and R Gama Plasma nitrotyrosine in reversible myocardial ischaemia J. Clin. Pathol., January 1, 2005; 58(1): 95 - 96. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. H. Rork, K. Van Dyke, N. M. Spiler, and G. F. Merrill Acetaminophen in the Hypoxic and Reoxygenated Guinea Pig Myocardium Experimental Biology and Medicine, December 1, 2004; 229(11): 1154 - 1161. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J.-M. Li and A. M Shah Endothelial cell superoxide generation: regulation and relevance for cardiovascular pathophysiology Am J Physiol Regulatory Integrative Comp Physiol, November 1, 2004; 287(5): R1014 - R1030. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J.-H. Chen, G. L Tipoe, E. C Liong, H. S. So, K.-M. Leung, W.-M. Tom, P. C. Fung, and A. A Nanji Green tea polyphenols prevent toxin-induced hepatotoxicity in mice by down-regulating inducible nitric oxide-derived prooxidants Am. J. Clinical Nutrition, September 1, 2004; 80(3): 742 - 751. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. C. Montalto, M. L. Hart, J. E. Jordan, K. Wada, and G. L. Stahl Role for complement in mediating intestinal nitric oxide synthase-2 and superoxide dismutase expression Am J Physiol Gastrointest Liver Physiol, June 9, 2003; 285(1): G197 - G206. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 H.-Y. Sohn, F. Krotz, S. Zahler, T. Gloe, M. Keller, K. Theisen, T. M Schiele, V. Klauss, and U. Pohl Crucial role of local peroxynitrite formation in neutrophil-induced endothelial cell activation Cardiovasc Res, March 1, 2003; 57(3): 804 - 815. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 G. F. Merrill Acetaminophen and low-flow myocardial ischemia: efficacy and antioxidant mechanisms Am J Physiol Heart Circ Physiol, April 1, 2002; 282(4): H1341 - H1349. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. B. Herrero, E. de Lamirande, and C. Gagnon Tyrosine nitration in human spermatozoa: a physiological function of peroxynitrite, the reaction product of nitric oxide and superoxide Mol. Hum. Reprod., October 1, 2001; 7(10): 913 - 921. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. Kajstura, F. Fiordaliso, A. M. Andreoli, B. Li, S. Chimenti, M. S. Medow, F. Limana, B. Nadal-Ginard, A. Leri, and P. Anversa IGF-1 Overexpression Inhibits the Development of Diabetic Cardiomyopathy and Angiotensin II-Mediated Oxidative Stress Diabetes, June 1, 2001; 50(6): 1414 - 1424. [Abstract] [Full Text]
|
|
|
|
|
|
G. Merrill, P. McConnell, K. Vandyke, and S. Powell Coronary and myocardial effects of acetaminophen: protection during ischemia-reperfusion Am J Physiol Heart Circ Physiol, June 1, 2001; 280(6): H2631 - H2638. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 P. Ferdinandy and R. Schulz Peroxynitrite: Toxic or Protective in the Heart? Circ. Res., February 2, 2001; 88 (2): e12 - e13. [Full Text] [PDF]
|
|
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||