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Kautza B, Gomez H, Escobar D, Corey C, Ataya B, Luciano J, Botero AM, Gordon L, Brumfield J, Martinez S, Holder A, Ogundele O, Pinsky M, Shiva S, Zuckerbraun BS. Inhaled, nebulized sodium nitrite protects in murine and porcine experimental models of hemorrhagic shock and resuscitation by limiting mitochondrial injury. Nitric Oxide 2015; 51:7-18. [PMID: 26410351 DOI: 10.1016/j.niox.2015.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 09/19/2015] [Accepted: 09/21/2015] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The cellular injury that occurs in the setting of hemorrhagic shock and resuscitation (HS/R) affects all tissue types and can drive altered inflammatory responses. Resuscitative adjuncts hold the promise of decreasing such injury. Here we test the hypothesis that sodium nitrite (NaNO2), delivered as a nebulized solution via an inhalational route, protects against injury and inflammation from HS/R. METHODS Mice underwent HS/R to a mean arterial pressure (MAP) of 20 or 25 mmHg. Mice were resuscitated with Lactated Ringers after 90-120 min of hypotension. Mice were randomized to receive nebulized NaNO2 via a flow through chamber (30 mg in 5 mL PBS). Pigs (30-35 kg) were anesthetized and bled to a MAP of 30-40 mmHg for 90 min, randomized to receive NaNO2 (11 mg in 2.5 mL PBS) nebulized into the ventilator circuit starting 60 min into the hypotensive period, followed by initial resuscitation with Hextend. Pigs had ongoing resuscitation and support for up to four hours. Hemodynamic data were collected continuously. RESULTS NaNO2 limited organ injury and inflammation in murine hemorrhagic shock. A nitrate/nitrite depleted diet exacerbated organ injury, as well as mortality, and inhaled NaNO2 significantly reversed this effect. Furthermore, NaNO2 limited mitochondrial oxidant injury. In porcine HS/R, NaNO2 had no significant influence on shock induced hemodynamics. NaNO2 limited hypoxia/reoxia or HS/R-induced mitochondrial injury and promoted mitochondrial fusion. CONCLUSION NaNO2 may be a useful adjunct to shock resuscitation based on its limitation of mitochondrial injury.
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Affiliation(s)
| | - Hernando Gomez
- Department of Critical Care Medicine, USA; The Center for Critical Care Nephrology, USA
| | | | | | | | | | | | | | | | | | | | | | - Michael Pinsky
- Department of Critical Care Medicine, USA; The Center for Critical Care Nephrology, USA
| | - Sruti Shiva
- Department of Pharmacology & Chemical Biology, USA; Vascular Medicine Institute, University of Pittsburgh, USA.
| | - Brian S Zuckerbraun
- VA Pittsburgh Healthcare System, USA; Department of Surgery, USA; The Center for Critical Care Nephrology, USA; Vascular Medicine Institute, University of Pittsburgh, USA.
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Xie YH, Zhang N, Li LF, Zhang QZ, Xie LJ, Jiang H, Li LP, Hao N, Zhang JX. Hydrogen sulfide reduces regional myocardial ischemia injury through protection of mitochondrial function. Mol Med Rep 2014; 10:1907-14. [PMID: 25198340 DOI: 10.3892/mmr.2014.2391] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 05/28/2014] [Indexed: 11/06/2022] Open
Abstract
Hydrogen sulfide (H2S) is a signaling gasotransmitter, involved in various physiological and pathological processes. H2S-donating drugs have been tested to conjugate the beneficial effects of H2S with other pharmaceutical properties. It has been shown that the endogenous cystathionine-γ-lyase (CSE)/H2S pathway participates in myocardial ischemia injury in isolated hearts in rats. The present study aimed to investigate the cytoprotective action of H2S against acute myocardial ischemia injury in rats. Isolated rat hearts were perfused and subjected to ischemic conditions for 4 h. The hearts were assigned to five groups: Sham, model, infarct plus low-dose (5 µmol/l) NaHS, infarct plus middle-dose (10 µmol/l) NaHS and infarct plus high-dose (20 µmol/l) NaHS. The administration of NaHS enhanced the activity of CSE, increased the content of H2S and reduced infarct volumes following myocardial ischemia injury. Furthermore, the administration of NaHS attenuated the injury to organelles (including the mitochondria, nucleus and myofilaments) by reducing lactate dehydrogenase activity, decreasing the level of mitochondrial malondialdehyde and increasing the activities of superoxide dismutase and glutathione peroxidase in the ischemic myocardial mitochondria. These protective effects of H2S against myocardial ischemia injury appeared to be mediated by its antioxidant activities and the preservation of mitochondrial function.
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Affiliation(s)
- Ying-Hua Xie
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei 050017, P.R. China
| | - Nan Zhang
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei 050017, P.R. China
| | - Lan-Fang Li
- Department of Pharmacology, Hebei Academy of Medical Sciences, Shijiazhuang, Hebei 050021, P.R. China
| | - Qin-Zeng Zhang
- Department of Pharmacology, Hebei Academy of Medical Sciences, Shijiazhuang, Hebei 050021, P.R. China
| | - Li-Jun Xie
- Department of Pharmacology, Hebei Academy of Medical Sciences, Shijiazhuang, Hebei 050021, P.R. China
| | - Hong Jiang
- Department of Pharmacology, Hebei Academy of Medical Sciences, Shijiazhuang, Hebei 050021, P.R. China
| | - Li-Ping Li
- Department of Pharmacology, Hebei Academy of Medical Sciences, Shijiazhuang, Hebei 050021, P.R. China
| | - Na Hao
- Department of Pharmacology, Hebei Academy of Medical Sciences, Shijiazhuang, Hebei 050021, P.R. China
| | - Jian-Xin Zhang
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei 050017, P.R. China
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Zelickson BR, Benavides GA, Johnson MS, Chacko BK, Venkatraman A, Landar A, Betancourt AM, Bailey SM, Darley-Usmar VM. Nitric oxide and hypoxia exacerbate alcohol-induced mitochondrial dysfunction in hepatocytes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2011; 1807:1573-82. [PMID: 21971515 DOI: 10.1016/j.bbabio.2011.09.011] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 09/15/2011] [Accepted: 09/18/2011] [Indexed: 12/26/2022]
Abstract
Chronic alcohol consumption results in hepatotoxicity, steatosis, hypoxia, increased expression of inducible nitric oxide synthase (iNOS) and decreased activities of mitochondrial respiratory enzymes. The impact of these changes on cellular respiration and their interaction in a cellular setting is not well understood. In the present study we tested the hypothesis that nitric oxide (NO)-dependent modulation of cellular respiration and the sensitivity to hypoxic stress is increased following chronic alcohol consumption. This is important since NO has been shown to regulate mitochondrial function through its interaction with cytochrome c oxidase, although at higher concentrations, and in combination with reactive oxygen species, can result in mitochondrial dysfunction. We found that hepatocytes isolated from alcohol-fed rats had decreased mitochondrial bioenergetic reserve capacity and were more sensitive to NO-dependent inhibition of respiration under room air and hypoxic conditions. We reasoned that this would result in greater hypoxic stress in vivo, and to test this, wild-type and iNOS(-/-) mice were administered alcohol-containing diets. Chronic alcohol consumption resulted in liver hypoxia in the wild-type mice and increased levels of hypoxia-inducible factor 1 α in the peri-venular region of the liver lobule. These effects were attenuated in the alcohol-fed iNOS(-/-) mice suggesting that increased mitochondrial sensitivity to NO and reactive nitrogen species in hepatocytes and iNOS plays a critical role in determining the response to hypoxic stress in vivo. These data support the concept that the combined effects of NO and ethanol contribute to an increased susceptibility to hypoxia and the deleterious effects of alcohol consumption on liver.
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Affiliation(s)
- Blake R Zelickson
- Center for Free Radical Biology, University of Alabama at Birmingham, AL 35294, USA
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Tyagi N, Vacek JC, Givvimani S, Sen U, Tyagi SC. Cardiac specific deletion of N-methyl-d-aspartate receptor 1 ameliorates mtMMP-9 mediated autophagy/mitophagy in hyperhomocysteinemia. J Recept Signal Transduct Res 2010; 30:78-87. [PMID: 20170426 DOI: 10.3109/10799891003614808] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Autophagy is an important process in the pathogenesis of cardiovascular diseases; however, the proximal triggers for mitochondrial autophagy were unknown. The N-methyl-d-aspartate receptor 1 (NMDA-R1) is a receptor for homocysteine (Hcy) and plays a key role in cardiac dysfunction. Cardiac-specific deletion of NMDA-R1 has been shown to ameliorate Hcy-induced myocyte contractility. Hcy activates mitochondrial matrix metalloproteinase-9 (mtMMP-9) and induces translocation of connexin-43 (Cxn-43) to the mitochondria (mtCxn-43). We sought to show cardiac-specific deletion of NMDA-R1 mitigates Hcy-induced mtCxn-43 translocation, mtMMP-9-mediated mtCxn-43 degradation, leading to mitophagy, in part, by decreasing mitochondrial permeability (MPT). Cardiac-specific knockout (KO) of NAMDA-R1 was generated using the cre/lox approach. The myocyte mitochondria were isolated from wild type (WT), WT + Hcy (1.8 g of DL-Hcy/L in the drinking water for 6 weeks), NMDA-R1 KO + Hcy, and NR1(fl/fl)/Cre (NR1(fl/fl)) genetic control mice. Mitochondrial respiratory capacity and MPT were measured by fluorescence-dye methods. The mitochondrial superoxide and peroxinitrite levels were detected by confocal microscopy using Mito-SOX and dihydrorhodamine-123. The mtMMP-9 activity and expression were detected by zymography and RT-PCR analyses. The mtCxn-43 translocation was detected by confocal microscopy. The degradation of mtCxn-43 and LC3-I/II (a marker of autophagy) were detected by Western blot. These results suggested that Hcy enhanced intramitochondrial nitrosative stress in myocytes. There was a robust increase in mtMMP-9 activity. An increase in translocation and degradation of mtCxn-43 was also noted. These increases led to mitophagy. The effects were ameliorated by cardiac-specific deletion of NMDA-R1. We concluded that HHcy increased mitochondrial nitrosative stress, thereby activating mtMMP-9 and inciting the degradation of mtCxn-43. This led to mitophagy, in part, by activating NMDA-R1. The findings of this study will lead to therapeutic ramifications for mitigating cardiovascular diseases by inhibiting the mitochondrial mitophagy and NMDA-R1 receptor.
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Affiliation(s)
- Neetu Tyagi
- Department of Physiology and Biophysics, School of Medicine, University of Louisville, Louisville, KY 40292, USA
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Elrod JW, Calvert JW, Morrison J, Doeller JE, Kraus DW, Tao L, Jiao X, Scalia R, Kiss L, Szabo C, Kimura H, Chow CW, Lefer DJ. Hydrogen sulfide attenuates myocardial ischemia-reperfusion injury by preservation of mitochondrial function. Proc Natl Acad Sci U S A 2007; 104:15560-5. [PMID: 17878306 PMCID: PMC2000503 DOI: 10.1073/pnas.0705891104] [Citation(s) in RCA: 876] [Impact Index Per Article: 51.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The recent discovery that hydrogen sulfide (H(2)S) is an endogenously produced gaseous second messenger capable of modulating many physiological processes, much like nitric oxide, prompted us to investigate the potential of H(2)S as a cardioprotective agent. In the current study, we demonstrate that the delivery of H(2)S at the time of reperfusion limits infarct size and preserves left ventricular (LV) function in an in vivo model of myocardial ischemia-reperfusion (MI-R). This observed cytoprotection is associated with an inhibition of myocardial inflammation and a preservation of both mitochondrial structure and function after I-R injury. Additionally, we show that modulation of endogenously produced H(2)S by cardiac-specific overexpression of cystathionine gamma-lyase (alpha-MHC-CGL-Tg mouse) significantly limits the extent of injury. These findings demonstrate that H(2)S may be of value in cytoprotection during the evolution of myocardial infarction and that either administration of H(2)S or the modulation of endogenous production may be of clinical benefit in ischemic disorders.
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Affiliation(s)
- John W. Elrod
- *Department of Medicine, Division of Cardiology and
- Departments of Pathology and
| | | | - Joanna Morrison
- Departments of Biology and Environmental Health Sciences, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Jeannette E. Doeller
- Departments of Biology and Environmental Health Sciences, University of Alabama at Birmingham, Birmingham, AL 35294
| | - David W. Kraus
- Departments of Biology and Environmental Health Sciences, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Ling Tao
- Departments of Emergency Medicine and
| | | | - Rosario Scalia
- Molecular Physiology and Biophysics, Thomas Jefferson University, Philadelphia, PA 19107
| | - Levente Kiss
- Department of Surgery, University of Medicine and Dentistry of New Jersey, Newark, NJ 07103; and
| | - Csaba Szabo
- Department of Surgery, University of Medicine and Dentistry of New Jersey, Newark, NJ 07103; and
| | - Hideo Kimura
- **National Institute of Neuroscience, Tokyo 187-8502, Japan
| | - Chi-Wing Chow
- Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461
| | - David J. Lefer
- *Department of Medicine, Division of Cardiology and
- Departments of Pathology and
- To whom correspondence should be addressed. E-mail:
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