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Ye P, Liu H, Qin Y, Li Z, Huang Z, Bu X, Peng Q, Duan N, Wang W, Wang X. SS-31 Mitigates Oxidative Stress and Restores Mitochondrial Function in Cigarette Smoke-Damaged Oral Epithelial Cells via PINK1-mediated Mitophagy. Chem Biol Interact 2024:111166. [PMID: 39069114 DOI: 10.1016/j.cbi.2024.111166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 07/12/2024] [Accepted: 07/25/2024] [Indexed: 07/30/2024]
Abstract
Smoking is a well-established risk factor for several oral diseases, including oral cancer, oral leukoplakia and periodontitis, primarily related to reactive oxygen species (ROS). SS-31, a mitochondria-targeting tetrapeptide, has exhibited demonstrable efficacy in medical conditions by attenuating mitochondrial ROS production. However, its potential in the treatment of oral diseases remains underexplored. The aim of this study was to investigate the therapeutic potential of SS-31 in mitigating smoking-induced oral epithelial injury. Through in vitro experiments, our results indicate that SS-31 plays a protective role against cigarette smoke extract (CSE) by reducing oxidative stress, attenuating inflammatory response, and restoring mitochondrial function. Furthermore, we found that mitophagy, regulated by PINK1 (PTEN-induced putative kinase 1)/Parkin (Parkin RBR E3 ubiquitin-protein ligase), was critical for the protective role of SS-31. Our findings offer valuable insights into SS-31's therapeutic potential in mitigating CSE-induced oxidative stress, inflammatory response, and mitochondrial dysfunction in oral epithelial cells. This study provides novel intervention targets for smoking-related oral diseases.
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Affiliation(s)
- Pei Ye
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Hong Liu
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Yao Qin
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Zhiyuan Li
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Zhuwei Huang
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Xiangwen Bu
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Qiao Peng
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Ning Duan
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Wenmei Wang
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China.
| | - Xiang Wang
- Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China.
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2
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Saleh TA, Whitson JA, Keiser P, Prasad P, Jenkins BC, Sodeinde T, Mann C, Rabinovitch PS, McReynolds MR, Sweetwyne MT. Metabolite accumulation from oral NMN supplementation drives aging-specific kidney inflammation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.09.588624. [PMID: 38645109 PMCID: PMC11030441 DOI: 10.1101/2024.04.09.588624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
The mitochondrial-rich renal tubule cells are key regulators of blood homeostasis via excretion and reabsorption of metabolic waste. With age, tubules are subject to increasing mitochondrial dysfunction and declining nicotinamide adenine dinucleotide (NAD+) levels, both hampering ATP production efficiency. We tested two mitochondrial interventions in young (6-mo) and aged (26-mo) adult male mice: elamipretide (ELAM), a tetrapeptide in clinical trials that improves mitochondrial structure and function, and nicotinamide mononucleotide (NMN), an NAD+ intermediate and commercially available oral supplement. Kidneys were analyzed from young and aged mice after eight weeks of treatment with ELAM (3 mg/kg/day), NMN (300 mg/kg/day), or from aged mice treated with the two interventions combined (ELAM+NMN). We hypothesized that combining pharmacologic treatments to ameliorate mitochondrial dysfunction and boost NAD+ levels, would more effectively reduce kidney aging than either intervention alone. Unexpectedly, in aged kidneys, NMN increased expression of genetic markers of inflammation (IL-1-beta; and Ccl2) and tubule injury (Kim-1). Metabolomics of endpoint sera showed that NMN-treated aged mice had higher circulating levels of uremic toxins than either aged controls or young NMN-treated mice. ELAM+NMN-treated aged mice accumulated uremic toxins like NMN-only aged mice, but reduced IL-1-beta; and Ccl2 kidney mRNA. This suggests that pre-existing mitochondrial dysfunction in aged kidney underlies susceptibility to inflammatory signaling with NMN supplementation in aged, but not young, mice. These findings demonstrate age and tissue dependent effects on downstream metabolic accumulation from NMN and highlight the need for targeted analysis of aged kidneys to assess the safety of anti-aging supplements in older populations.
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Abstract
Sepsis-associated AKI is a life-threatening complication that is associated with high morbidity and mortality in patients who are critically ill. Although it is clear early supportive interventions in sepsis reduce mortality, it is less clear that they prevent or ameliorate sepsis-associated AKI. This is likely because specific mechanisms underlying AKI attributable to sepsis are not fully understood. Understanding these mechanisms will form the foundation for the development of strategies for early diagnosis and treatment of sepsis-associated AKI. Here, we summarize recent laboratory and clinical studies, focusing on critical factors in the pathophysiology of sepsis-associated AKI: microcirculatory dysfunction, inflammation, NOD-like receptor protein 3 inflammasome, microRNAs, extracellular vesicles, autophagy and efferocytosis, inflammatory reflex pathway, vitamin D, and metabolic reprogramming. Lastly, identifying these molecular targets and defining clinical subphenotypes will permit precision approaches in the prevention and treatment of sepsis-associated AKI.
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Affiliation(s)
- Shuhei Kuwabara
- Division of Nephrology and Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia, Charlottesville, Virginia
| | - Eibhlin Goggins
- Division of Nephrology and Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia, Charlottesville, Virginia
| | - Mark D Okusa
- Division of Nephrology and Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia, Charlottesville, Virginia
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SS-31, a Mitochondria-Targeting Peptide, Ameliorates Kidney Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:1295509. [PMID: 35707274 PMCID: PMC9192202 DOI: 10.1155/2022/1295509] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 05/27/2022] [Indexed: 12/22/2022]
Abstract
Mitochondria are essential for eukaryotic cell activity and function, and their dysfunction is associated with the development and progression of renal diseases. In recent years, there has been a rapid development in mitochondria-targeting pharmacological strategies as mitochondrial biogenesis, morphology, and function, as well as dynamic changes in mitochondria, have been studied in disease states. Mitochondria-targeting drugs include nicotinamide mononucleotide, which supplements the NAD+ pool; mitochondria-targeted protective compounds, such as MitoQ; the antioxidant coenzyme, Q10; and cyclosporin A, an inhibitor of the mitochondrial permeability transition pore. However, traditional drugs targeting mitochondria have limited clinical applications due to their inability to be effectively absorbed by mitochondria in vivo and their high toxicity. Recently, SS-31, a mitochondria-targeting antioxidant, has received significant research attention as it decreases mitochondrial reactive oxygen species production and prevents mitochondrial depolarization, mitochondrial permeability transition pore formation, and Ca2+-induced mitochondrial swelling, and has no effects on normal mitochondria. At present, few studies have evaluated the effects of SS-31 against renal diseases, and the mechanism underlying its action is unclear. In this review, we first discuss the pharmacokinetics of SS-31 and the possible mechanisms underlying its protective effects against renal diseases. Then, we analyze its renal disease-improving effects in various experimental models, including animal and cell models, and summarize the clinical evidence of its benefits in renal disease treatment. Finally, the potential mechanism underlying the action of SS-31 against renal diseases is explored to lay a foundation for future preclinical studies and for the evaluation of its clinical applications.
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5
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Fock EM, Parnova RG. Protective Effect of Mitochondria-Targeted Antioxidants against Inflammatory Response to Lipopolysaccharide Challenge: A Review. Pharmaceutics 2021; 13:pharmaceutics13020144. [PMID: 33499252 PMCID: PMC7910823 DOI: 10.3390/pharmaceutics13020144] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/15/2021] [Accepted: 01/17/2021] [Indexed: 12/16/2022] Open
Abstract
Lipopolysaccharide (LPS), the major component of the outer membrane of Gram-negative bacteria, is the most abundant proinflammatory agent. Considerable evidence indicates that LPS challenge inescapably causes oxidative stress and mitochondrial dysfunction, leading to cell and tissue damage. Increased mitochondrial reactive oxygen species (mtROS) generation triggered by LPS is known to play a key role in the progression of the inflammatory response. mtROS at excessive levels impair electron transport chain functioning, reduce the mitochondrial membrane potential, and initiate lipid peroxidation and oxidative damage of mitochondrial proteins and mtDNA. Over the past 20 years, a large number of mitochondria-targeted antioxidants (mito-AOX) of different structures that can accumulate inside mitochondria and scavenge free radicals have been synthesized. Their protective role based on the prevention of oxidative stress and the restoration of mitochondrial function has been demonstrated in a variety of common diseases and pathological states. This paper reviews the current data on the beneficial application of different mito-AOX in animal endotoxemia models, in either in vivo or in vitro experiments. The results presented in our review demonstrate the promising potential of approaches based on mito-AOX in the development of new treatment strategies against Gram-negative infections and LPS per se.
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Brand MD. Riding the tiger - physiological and pathological effects of superoxide and hydrogen peroxide generated in the mitochondrial matrix. Crit Rev Biochem Mol Biol 2020; 55:592-661. [PMID: 33148057 DOI: 10.1080/10409238.2020.1828258] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Elevated mitochondrial matrix superoxide and/or hydrogen peroxide concentrations drive a wide range of physiological responses and pathologies. Concentrations of superoxide and hydrogen peroxide in the mitochondrial matrix are set mainly by rates of production, the activities of superoxide dismutase-2 (SOD2) and peroxiredoxin-3 (PRDX3), and by diffusion of hydrogen peroxide to the cytosol. These considerations can be used to generate criteria for assessing whether changes in matrix superoxide or hydrogen peroxide are both necessary and sufficient to drive redox signaling and pathology: is a phenotype affected by suppressing superoxide and hydrogen peroxide production; by manipulating the levels of SOD2, PRDX3 or mitochondria-targeted catalase; and by adding mitochondria-targeted SOD/catalase mimetics or mitochondria-targeted antioxidants? Is the pathology associated with variants in SOD2 and PRDX3 genes? Filtering the large literature on mitochondrial redox signaling using these criteria highlights considerable evidence that mitochondrial superoxide and hydrogen peroxide drive physiological responses involved in cellular stress management, including apoptosis, autophagy, propagation of endoplasmic reticulum stress, cellular senescence, HIF1α signaling, and immune responses. They also affect cell proliferation, migration, differentiation, and the cell cycle. Filtering the huge literature on pathologies highlights strong experimental evidence that 30-40 pathologies may be driven by mitochondrial matrix superoxide or hydrogen peroxide. These can be grouped into overlapping and interacting categories: metabolic, cardiovascular, inflammatory, and neurological diseases; cancer; ischemia/reperfusion injury; aging and its diseases; external insults, and genetic diseases. Understanding the involvement of mitochondrial matrix superoxide and hydrogen peroxide concentrations in these diseases can facilitate the rational development of appropriate therapies.
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7
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Bhatia D, Capili A, Choi ME. Mitochondrial dysfunction in kidney injury, inflammation, and disease: Potential therapeutic approaches. Kidney Res Clin Pract 2020; 39:244-258. [PMID: 32868492 PMCID: PMC7530368 DOI: 10.23876/j.krcp.20.082] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/21/2020] [Accepted: 06/23/2020] [Indexed: 12/19/2022] Open
Abstract
Mitochondria are energy-producing organelles that not only satisfy the high metabolic demands of the kidney but sense and respond to kidney injury-induced oxidative stress and inflammation. Kidneys are rich in mitochondria. Mitochondrial dysfunction plays a critical role in the progression of acute kidney injury and chronic kidney disease. Mitochondrial responses to specific stimuli are highly regulated and synergistically modulated by tightly interconnected processes, including mitochondrial dynamics (fission, fusion) and mitophagy. The counterbalance between these processes is essential in maintaining a healthy network of mitochondria. Recent literature suggests that alterations in mitochondrial dynamics are implicated in kidney injury and the progression of kidney diseases. A decrease in mitochondrial fusion promotes fission-induced mitochondrial fragmentation, but a reduction in mitochondrial fission produces excessive mitochondrial elongation. The removal of dysfunctional mitochondria by mitophagy is crucial for their quality control. Defective mitochondrial function disrupts cellular redox potential and can cause cell death. Mitochondrial DNA derived from damaged cells also act as damage-associated molecular patterns to recruit immune cells and the inflammatory response can further exaggerate kidney injury. This review provides a comprehensive overview of the role of mitochondrial dysfunction in acute kidney injury and chronic kidney disease. We discuss the processes that control mitochondrial stress responses to kidney injury and review recent advances in understanding the role of mitochondrial dysfunction in inflammation and tissue damage through the use of different experimental models of kidney disease. We also describe potential mitochondria-targeted therapeutic approaches.
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Affiliation(s)
- Divya Bhatia
- Division of Nephrology and Hypertension, Joan and Sanford I. Weill Department of Medicine, New York, NY, USA
| | - Allyson Capili
- Division of Nephrology and Hypertension, Joan and Sanford I. Weill Department of Medicine, New York, NY, USA
| | - Mary E. Choi
- Division of Nephrology and Hypertension, Joan and Sanford I. Weill Department of Medicine, New York, NY, USA
- Department of Medicine, NewYork-Presbyterian Hospital/Weill Cornell Medicine, New York, NY, USA
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8
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Mitochondrial Function in the Kidney and Heart, but Not the Brain, is Mainly Altered in an Experimental Model of Endotoxaemia. Shock 2020; 52:e153-e162. [PMID: 30640252 DOI: 10.1097/shk.0000000000001315] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Significant impairments in mitochondrial function are associated with the development of multi-organ failure in sepsis/endotoxaemia, but the data on the dynamics of simultaneous mitochondrial impairment in multiple organs are limited. The aim of this study was to evaluate the changes in heart, brain and kidney mitochondrial function in an experimental model of lipopolysaccharide (LPS)-induced endotoxaemia.Samples were collected 4 and 24 h after single injection of LPS (10 mg/kg) in mice. Marked increases in inflammation-related gene expression were observed in all studied tissues 4 h after LPS administration. At 24 h post LPS administration, this expression of inflammation-related genes remained upregulated only in kidneys. Significantly increased concentrations of kidney function markers confirmed that kidneys were severely damaged. Echocardiographic measurements showed that the ejection fraction and fractional shortening were significantly reduced 4 h after LPS administration, whereas 24 h after LPS administration, the cardiac function was restored to baseline. A two-fold decrease in mitochondrial oxidative phosphorylation (OXPHOS) capacity in the kidney was observed 4 and 24 h after LPS administration. Significant decrease in mitochondrial fatty acid oxidation was observed in heart 4 h after LPS administration. Furthermore, 24 h after LPS administration, the respiration rates in cardiac fibers at OXPHOS and electron transport (ET) states were significantly increased, which resulted in increased ET coupling efficiency in the LPS-treated group, whereas four-fold increases in the H2O2 production rate and H2O2/O ratio were observed. The brain mitochondria demonstrated a slightly impaired mitochondrial functionality just 24 h after the induction of endotoxaemia.In conclusion, among studied tissues kidney mitochondria are the most sensitive to endotoxaemia and do not recover from LPS-induced damage, whereas in brain, mitochondrial function was not significantly altered. In heart, endotoxaemia induces a decrease in the mitochondrial fatty acid oxidation capacity, but during the phase of suppressed inflammatory response, the ET efficiency is improved despite the marked increase in reactive oxygen species production.
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9
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Zuo Z, Jing K, Wu H, Wang S, Ye L, Li Z, Yang C, Pan Q, Liu WJ, Liu HF. Mechanisms and Functions of Mitophagy and Potential Roles in Renal Disease. Front Physiol 2020; 11:935. [PMID: 32903665 PMCID: PMC7438724 DOI: 10.3389/fphys.2020.00935] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 07/13/2020] [Indexed: 12/19/2022] Open
Abstract
Mitophagy is an evolutionarily conserved process to selectively remove damaged or unnecessary mitochondria via the autophagic machinery. In this review, we focus on recent advances in the molecular mechanisms of mitophagy and how mitophagy contributes to cellular homeostasis in physiological and pathological contexts. We also briefly review and discuss the crosstalk between mitophagy and renal disease, highlighting its modulation as a potentially effective therapeutic strategy to treat kidney diseases such as acute kidney injury (AKI), diabetic kidney disease (DKD), and lupus nephritis (LN).
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Affiliation(s)
- Zhenying Zuo
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Kaipeng Jing
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Hongluan Wu
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Shujun Wang
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Lin Ye
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Zhihang Li
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Chen Yang
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Qingjun Pan
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Wei Jing Liu
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Key Laboratory of Chinese Internal Medicine, Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China.,Renal Research Institution of Beijing University of Chinese Medicine, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Hua-Feng Liu
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
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10
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Fokam D, Dickson K, Kamali K, Holbein B, Colp P, Stueck A, Zhou J, Lehmann C. Iron Chelation in Murine Models of Systemic Inflammation Induced by Gram-Positive and Gram-Negative Toxins. Antibiotics (Basel) 2020; 9:antibiotics9060283. [PMID: 32466384 PMCID: PMC7345558 DOI: 10.3390/antibiotics9060283] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/08/2020] [Accepted: 05/22/2020] [Indexed: 12/28/2022] Open
Abstract
Iron is an essential element for various physiological processes, but its levels must remain tightly regulated to avoid cellular damage. Similarly, iron plays a dual role in systemic inflammation, such as with sepsis. Leukocytes utilize iron to produce reactive oxygen species (ROS) to kill bacteria, but pathologically increased iron-catalyzed ROS production in sepsis can lead to damage of host cells, multi-organ failure and death. Temporary reduction in bioavailable iron represents a potential therapeutic target in sepsis. This study investigates the effect of the novel iron chelator, DIBI, in murine models of systemic (hyper-)inflammation: C57BL/6 mice were challenged with toxins from Gram-positive (Staphylococcus aureus: lipoteichoic acid, peptidoglycan) and Gram-negative bacteria (Escherichia coli and Klebsiella pneumoniae: lipopolysaccharide). Intravital microscopy (IVM) was performed to assess immune cell activation and its impact on microvascular blood flow in vivo in the microcirculation of the gut. Plasma inflammatory mediators were measured via multiplex assay, and morphologic change in intestinal tissue was evaluated. DIBI treatment decreased leukocyte (hyper-)activation induced by Gram-positive and Gram-negative toxins. In some cases, it preserved capillary perfusion, reduced plasma inflammatory markers and attenuated tissue damage. These findings support the utility of DIBI as a novel treatment for systemic inflammation, e.g., sepsis.
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Affiliation(s)
- Danielle Fokam
- Department of Physiology and Biophysics, Dalhousie University, Halifax, NS B3H 1X5, Canada;
| | - Kayle Dickson
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 1X5, Canada; (K.D.); (B.H.)
| | - Kiyana Kamali
- Department of Pharmacology, Dalhousie University, Halifax, NS B3H 1X5, Canada;
| | - Bruce Holbein
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 1X5, Canada; (K.D.); (B.H.)
| | - Patricia Colp
- Department of Pathology, Dalhousie University, Halifax, NS B3H 1X5, Canada; (P.C.); (A.S.)
| | - Ashley Stueck
- Department of Pathology, Dalhousie University, Halifax, NS B3H 1X5, Canada; (P.C.); (A.S.)
| | - Juan Zhou
- Department of Anesthesia, Pain and Perioperative Medicine, Dalhousie University, Halifax, NS B3H 1X5, Canada;
| | - Christian Lehmann
- Department of Physiology and Biophysics, Dalhousie University, Halifax, NS B3H 1X5, Canada;
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 1X5, Canada; (K.D.); (B.H.)
- Department of Pharmacology, Dalhousie University, Halifax, NS B3H 1X5, Canada;
- Department of Anesthesia, Pain and Perioperative Medicine, Dalhousie University, Halifax, NS B3H 1X5, Canada;
- Correspondence: ; Tel.: +1-902-494-1287
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11
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Liu Y, Yang W, Sun X, Xie L, Yang Y, Sang M, Jiao R. SS31 Ameliorates Sepsis-Induced Heart Injury by Inhibiting Oxidative Stress and Inflammation. Inflammation 2020; 42:2170-2180. [PMID: 31494795 DOI: 10.1007/s10753-019-01081-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Sepsis-induced myocardial dysfunction (SIMD), lack of effective treatment, accounts for high mortality of sepsis. Mitochondrion-targeted antioxidant peptide SS31 has been revealed to be responsible for certain cardiovascular disease by ameliorating oxidative stress injury. But whether it protects a septic heart remains little known. This study sought to prove that SS31 was capable of improving sepsis-induced myocardial dysfunction dramatically. C57BL/6 mice were intraperitoneally administered lipopolysaccharide (LPS), exposed to systemic inflammation. Thirty-five C57BL/6 mice were randomly divided into four groups: sham group, LPS group (5 mg/kg), SS31 group (5 mg/kg), and SS31 + LPS group (treatment group). Heart tissues were harvested for pathological examination at the indicated time points. H9C2 cell were treated with LPS with or without the presence of SS31 (10 μM) at 37 °C to assess the effect on cardiomyocytes at the indicated time points. SS31 restored myocardial morphological damage and suppressed inflammatory response as evidenced by significantly decreasing the mRNA levels of IL-6, IL-1β, and TNF-α in vitro and in vivo. In addition, myocardial energy deficiency secondary to sepsis was remarkedly ameliorated by SS31. Furthermore, we found that SS-31 normalized the activity of malondialdehyde, glutathione peroxidase, and superoxide dismutase in vitro and in vivo, and maintained mitochondrial membrane potential (MMP) as well. And western blot was applied to measure the expressions of p-p38MAPK, p-JNK1/2, p-ERK, p62, and NF-κB p65; the results illuminated that the cardioprotective effect of SS31 was partly linked to NF-κB. In conclusion, SS31 therapy effectively protected the heart against LPS-induced cardiac damage.
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Affiliation(s)
- Yue Liu
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, No. 15 Jiefang Road, Xiangyang, 441000, Hubei Province, People's Republic of China
| | - Wenjian Yang
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, No. 15 Jiefang Road, Xiangyang, 441000, Hubei Province, People's Republic of China
| | - Xiaodong Sun
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, No. 15 Jiefang Road, Xiangyang, 441000, Hubei Province, People's Republic of China
| | - Lixia Xie
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, No. 15 Jiefang Road, Xiangyang, 441000, Hubei Province, People's Republic of China
| | - Yi Yang
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, No. 15 Jiefang Road, Xiangyang, 441000, Hubei Province, People's Republic of China
| | - Ming Sang
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, No. 15 Jiefang Road, Xiangyang, 441000, Hubei Province, People's Republic of China
| | - Rong Jiao
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, No. 15 Jiefang Road, Xiangyang, 441000, Hubei Province, People's Republic of China.
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12
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Mayorov V, Uchakin P, Amarnath V, Panov AV, Bridges CC, Uzhachenko R, Zackert B, Moore CS, Davies S, Dikalova A, Dikalov S. Targeting of reactive isolevuglandins in mitochondrial dysfunction and inflammation. Redox Biol 2019; 26:101300. [PMID: 31437812 PMCID: PMC6831880 DOI: 10.1016/j.redox.2019.101300] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 08/09/2019] [Accepted: 08/14/2019] [Indexed: 01/09/2023] Open
Abstract
Inflammation is a major cause of morbidity and mortality in Western societies. Despite use of multiple drugs, both chronic and acute inflammation still represent major health burdens. Inflammation produces highly reactive dicarbonyl lipid peroxidation products such as isolevuglandins which covalently modify and cross-link proteins via lysine residues. Mitochondrial dysfunction has been associated with inflammation; however, its molecular mechanisms and pathophysiological role are still obscure. We hypothesized that inflammation-induced isolevuglandins contribute to mitochondrial dysfunction and mortality. To test this hypothesis, we have (a) investigated the mitochondrial dysfunction in response to synthetic 15-E2-isolevuglandin (IsoLG) and its adducts; (b) developed a new mitochondria-targeted scavenger of isolevuglandins by conjugating 2-hydroxybenzylamine to the lipophilic cation triphenylphosphonium, (4-(4-aminomethyl)-3-hydroxyphenoxy)butyl)-triphenylphosphonium (mito2HOBA); (c) tested if mito2HOBA protects from mitochondrial dysfunction and mortality using a lipopolysaccharide model of inflammation. Acute exposure to either IsoLG or IsoLG adducts with lysine, ethanolamine or phosphatidylethanolamine inhibits mitochondrial respiration and attenuates Complex I activity. Complex II function was much more resistant to IsoLG. We confirmed that mito2HOBA markedly accumulates in isolated mitochondria and it is highly reactive with IsoLGs. To test the role of mitochondrial IsoLGs, we studied the therapeutic potential of mito2HOBA in lipopolysaccharide mouse model of sepsis. Mito2HOBA supplementation in drinking water (0.1 g/L) to lipopolysaccharide treated mice increased survival by 3-fold, improved complex I-mediated respiration, and histopathological analyses supported mito2HOBA-mediated protection of renal cortex from cell injury. These data support the role of mitochondrial IsoLG in mitochondrial dysfunction and inflammation. We conclude that reducing mitochondrial IsoLGs may be a promising therapeutic target in inflammation and conditions associated with mitochondrial oxidative stress and dysfunction.
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Affiliation(s)
| | - Peter Uchakin
- Mercer University School of Medicine, Macon, GA, USA
| | | | - Alexander V Panov
- Institute of Molecular Biology & Biophysics, Novosibirsk, Russian Federation
| | | | | | - Bill Zackert
- Vanderbilt University Medical Center, Nashville, TN, USA
| | | | - Sean Davies
- Vanderbilt University Medical Center, Nashville, TN, USA
| | - Anna Dikalova
- Vanderbilt University Medical Center, Nashville, TN, USA
| | - Sergey Dikalov
- Vanderbilt University Medical Center, Nashville, TN, USA.
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13
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Sun J, Zhang J, Tian J, Virzì GM, Digvijay K, Cueto L, Yin Y, Rosner MH, Ronco C. Mitochondria in Sepsis-Induced AKI. J Am Soc Nephrol 2019; 30:1151-1161. [PMID: 31076465 DOI: 10.1681/asn.2018111126] [Citation(s) in RCA: 136] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
AKI is a common clinical condition associated with the risk of developing CKD and ESKD. Sepsis is the leading cause of AKI in the intensive care unit (ICU) and accounts for nearly half of all AKI events. Patients with AKI who require dialysis have an unacceptably high mortality rate of 60%-80%. During sepsis, endothelial activation, increased microvascular permeability, changes in regional blood flow distribution with resulting areas of hypoperfusion, and hypoxemia can lead to AKI. No effective drugs to prevent or treat human sepsis-induced AKI are currently available. Recent research has identified dysfunction in energy metabolism as a critical contributor to the pathogenesis of AKI. Mitochondria, the center of energy metabolism, are increasingly recognized to be involved in the pathophysiology of sepsis-induced AKI and mitochondria could serve as a potential therapeutic target. In this review, we summarize the potential role of mitochondria in sepsis-induced AKI and identify future therapeutic approaches that target mitochondrial function in an effort to treat sepsis-induced AKI.
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Affiliation(s)
- Jian Sun
- Department of Emergency and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, China.,International Renal Research Institute of Vicenza, Vicenza, Italy
| | - Jingxiao Zhang
- Department of Emergency and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, China.,International Renal Research Institute of Vicenza, Vicenza, Italy
| | - Jiakun Tian
- Department of Emergency and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, China
| | - Grazia Maria Virzì
- International Renal Research Institute of Vicenza, Vicenza, Italy.,Department of Nephrology, Dialysis and Transplantation, San Bortolo Hospital, Vicenza, Italy
| | - Kumar Digvijay
- International Renal Research Institute of Vicenza, Vicenza, Italy.,Department of Nephrology, Dialysis and Transplantation, San Bortolo Hospital, Vicenza, Italy.,Molecular Biotechnology Center, Department of Medical Sciences, University of Turin, Italy
| | - Laura Cueto
- International Renal Research Institute of Vicenza, Vicenza, Italy.,Department of Nephrology, Dialysis and Transplantation, Virgen de la Salud Hospital, Toledo, Spain; and
| | - Yongjie Yin
- Department of Emergency and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, China;
| | - Mitchell H Rosner
- Division of Nephrology, University of Virginia Health System, Charlottesville, Virginia
| | - Claudio Ronco
- International Renal Research Institute of Vicenza, Vicenza, Italy.,Department of Nephrology, Dialysis and Transplantation, San Bortolo Hospital, Vicenza, Italy
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14
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Zhang W, Tam J, Shinozaki K, Yin T, Lampe JW, Becker LB, Kim J. Increased Survival Time With SS-31 After Prolonged Cardiac Arrest in Rats. Heart Lung Circ 2019; 28:505-508. [PMID: 29503242 PMCID: PMC6081272 DOI: 10.1016/j.hlc.2018.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 01/05/2018] [Accepted: 01/10/2018] [Indexed: 01/13/2023]
Abstract
BACKGROUND Cardiac arrest is one of the leading causes of death with a very high mortality rate. No therapeutic drug that can be administered during resuscitation has been reported. Mitochondrial dysfunction is believed to play an important role for the pathogenesis of cardiac arrest. SS-31, a tetra-peptide, has been shown to protect mitochondria from ischaemia/reperfusion injury. Therefore, we tested whether SS-31 improves rat survival after prolonged cardiac arrest. METHODS Rats were randomised into two groups. After 25minutes of asphyxia-induced cardiac arrest, rats were resuscitated with or without SS-31 using cardiopulmonary bypass resuscitation. Rat survival was followed for additional 4.5hours using haemodynamic monitoring. The blood gas was analysed for surviving rats at multiple time points. RESULTS AND CONCLUSIONS After 5hours, 5 of 10 rats survived in the SS-31 group whereas only 1 of 10 rats survived in the control group (p=0.026). At 90minutes after resuscitation, the blood lactate level in the SS-31 treated rats (4.29±2.5mmol/L) was significantly lower than in control rats (7.36±3.1mmol/L, p=0.026), suggesting mitochondrial aerobic respiration was improved with SS-31 treatment. Overall, our data show the potential of SS-31 as a novel therapeutic in cardiac arrest.
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Affiliation(s)
- Wei Zhang
- Center for Resuscitation Science, Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jonathan Tam
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, USA
| | - Koichiro Shinozaki
- Center for Resuscitation Science, Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Emergency Medicine, Feinstein Institute for Medical Research, Northwell Health System, Manhasset, NY, USA
| | - Tai Yin
- Center for Resuscitation Science, Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Emergency Medicine, Feinstein Institute for Medical Research, Northwell Health System, Manhasset, NY, USA
| | - Joshua W Lampe
- Center for Resuscitation Science, Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA; Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, USA; Department of Emergency Medicine, Feinstein Institute for Medical Research, Northwell Health System, Manhasset, NY, USA
| | - Lance B Becker
- Center for Resuscitation Science, Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA; Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, USA; Department of Emergency Medicine, Feinstein Institute for Medical Research, Northwell Health System, Manhasset, NY, USA
| | - Junhwan Kim
- Center for Resuscitation Science, Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA; Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, USA; Department of Emergency Medicine, Feinstein Institute for Medical Research, Northwell Health System, Manhasset, NY, USA.
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15
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Szeto HH, Liu S. Cardiolipin-targeted peptides rejuvenate mitochondrial function, remodel mitochondria, and promote tissue regeneration during aging. Arch Biochem Biophys 2018; 660:137-148. [DOI: 10.1016/j.abb.2018.10.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Revised: 10/13/2018] [Accepted: 10/18/2018] [Indexed: 12/21/2022]
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16
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The role of mitochondria in sepsis-induced cardiomyopathy. Biochim Biophys Acta Mol Basis Dis 2018; 1865:759-773. [PMID: 30342158 DOI: 10.1016/j.bbadis.2018.10.011] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/02/2018] [Accepted: 10/05/2018] [Indexed: 02/08/2023]
Abstract
Sepsis is defined as a life-threatening organ dysfunction caused by a dysregulated host response to infection. Myocardial dysfunction, often termed sepsis-induced cardiomyopathy, is a frequent complication and is associated with worse outcomes. Numerous mechanisms contribute to sepsis-induced cardiomyopathy and a growing body of evidence suggests that bioenergetic and metabolic derangements play a central role in its development; however, there are significant discrepancies in the literature, perhaps reflecting variability in the experimental models employed or in the host response to sepsis. The condition is characterised by lack of significant cell death, normal tissue oxygen levels and, in survivors, reversibility of organ dysfunction. The functional changes observed in cardiac tissue may represent an adaptive response to prolonged stress that limits cell death, improving the potential for recovery. In this review, we describe our current understanding of the pathophysiology underlying myocardial dysfunction in sepsis, with a focus on disrupted mitochondrial processes.
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Abstract
AKI is associated with high morbidity and mortality, and it predisposes to the development and progression of CKD. Novel strategies that minimize AKI and halt the progression of CKD are urgently needed. Normal kidney function involves numerous different cell types, such as tubular epithelial cells, endothelial cells, and podocytes, working in concert. This delicate balance involves many energy-intensive processes. Fatty acids are the preferred energy substrates for the kidney, and defects in fatty acid oxidation and mitochondrial dysfunction are universally involved in diverse causes of AKI and CKD. This review provides an overview of ATP production and energy demands in the kidney and summarizes preclinical and clinical evidence of mitochondrial dysfunction in AKI and CKD. New therapeutic strategies targeting mitochondria protection and cellular bioenergetics are presented, with emphasis on those that have been evaluated in animal models of AKI and CKD. Targeting mitochondrial function and cellular bioenergetics upstream of cellular damage may offer advantages compared with targeting downstream inflammatory and fibrosis processes.
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Affiliation(s)
- Hazel H Szeto
- Mitochondrial Therapeutics Consulting, New York, New York
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18
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Szeto HH, Liu S, Soong Y, Seshan SV, Cohen-Gould L, Manichev V, Feldman LC, Gustafsson T. Mitochondria Protection after Acute Ischemia Prevents Prolonged Upregulation of IL-1 β and IL-18 and Arrests CKD. J Am Soc Nephrol 2016; 28:1437-1449. [PMID: 27881606 DOI: 10.1681/asn.2016070761] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Accepted: 10/25/2016] [Indexed: 11/03/2022] Open
Abstract
The innate immune system has been implicated in both AKI and CKD. Damaged mitochondria release danger molecules, such as reactive oxygen species, DNA, and cardiolipin, which can cause NLRP3 inflammasome activation and upregulation of IL-18 and IL-1β It is not known if mitochondrial damage persists long after ischemia to sustain chronic inflammasome activation. We conducted a 9-month study in Sprague-Dawley rats after 45 minutes of bilateral renal ischemia. We detected glomerular and peritubular capillary rarefaction, macrophage infiltration, and fibrosis at 1 month. Transmission electron microscopy revealed mitochondrial degeneration, mitophagy, and deformed foot processes in podocytes. These changes progressed over the study period, with a persistent increase in renal cortical expression of IL-18, IL-1β, and TGF-β, despite a gradual decline in TNF-α expression and macrophage infiltration. Treatment with a mitoprotective agent (SS-31; elamipretide) for 6 weeks, starting 1 month after ischemia, preserved mitochondrial integrity, ameliorated expression levels of all inflammatory markers, restored glomerular capillaries and podocyte structure, and arrested glomerulosclerosis and interstitial fibrosis. Further, helium ion microscopy vividly demonstrated the restoration of podocyte structure by SS-31. The protection by SS-31 was sustained for ≥6 months after treatment ended, with normalization of IL-18 and IL-1β expression. These results support a role for mitochondrial damage in inflammasome activation and CKD and suggest mitochondrial protection as a novel therapeutic approach that can arrest the progression of CKD. Notably, SS-31 is effective when given long after AKI and provides persistent protection after termination of drug treatment.
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Affiliation(s)
- Hazel H Szeto
- Department of Pharmacology, .,Research Program in Mitochondrial Therapeutics
| | - Shaoyi Liu
- Department of Pharmacology.,Research Program in Mitochondrial Therapeutics
| | - Yi Soong
- Department of Pharmacology.,Research Program in Mitochondrial Therapeutics
| | | | - Leona Cohen-Gould
- Department of Biochemistry, Weill Cornell Medical College, New York, New York; and
| | - Viacheslav Manichev
- Institute of Advanced Materials, Devices, and Nanotechnology, and.,Institute of Advanced Materials, Devices, and Nanotechnology, and
| | - Leonard C Feldman
- Institute of Advanced Materials, Devices, and Nanotechnology, and.,Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey
| | - Torgny Gustafsson
- Institute of Advanced Materials, Devices, and Nanotechnology, and.,Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey
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19
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Neri M, Riezzo I, Pomara C, Schiavone S, Turillazzi E. Oxidative-Nitrosative Stress and Myocardial Dysfunctions in Sepsis: Evidence from the Literature and Postmortem Observations. Mediators Inflamm 2016; 2016:3423450. [PMID: 27274621 PMCID: PMC4870364 DOI: 10.1155/2016/3423450] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 04/11/2016] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Myocardial depression in sepsis is common, and it is associated with higher mortality. In recent years, the hypothesis that the myocardial dysfunction during sepsis could be mediated by ischemia related to decreased coronary blood flow waned and a complex mechanism was invoked to explain cardiac dysfunction in sepsis. Oxidative stress unbalance is thought to play a critical role in the pathogenesis of cardiac impairment in septic patients. AIM In this paper, we review the current literature regarding the pathophysiology of cardiac dysfunction in sepsis, focusing on the possible role of oxidative-nitrosative stress unbalance and mitochondria dysfunction. We discuss these mechanisms within the broad scenario of cardiac involvement in sepsis. CONCLUSIONS Findings from the current literature broaden our understanding of the role of oxidative and nitrosative stress unbalance in the pathophysiology of cardiac dysfunction in sepsis, thus contributing to the establishment of a relationship between these settings and the occurrence of oxidative stress. The complex pathogenesis of septic cardiac failure may explain why, despite the therapeutic strategies, sepsis remains a big clinical challenge for effectively managing the disease to minimize mortality, leading to consideration of the potential therapeutic effects of antioxidant agents.
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Affiliation(s)
- M. Neri
- Institute of Forensic Pathology, Department of Clinical and Experimental Medicine, University of Foggia, Ospedale Colonnello D'Avanzo, Viale degli Aviatori 1, 71100 Foggia, Italy
| | - I. Riezzo
- Institute of Forensic Pathology, Department of Clinical and Experimental Medicine, University of Foggia, Ospedale Colonnello D'Avanzo, Viale degli Aviatori 1, 71100 Foggia, Italy
| | - C. Pomara
- Institute of Forensic Pathology, Department of Clinical and Experimental Medicine, University of Foggia, Ospedale Colonnello D'Avanzo, Viale degli Aviatori 1, 71100 Foggia, Italy
| | - S. Schiavone
- Institute of Pharmacology, Department of Clinical and Experimental Medicine, University of Foggia, Via L. Pinto 1, 71100 Foggia, Italy
| | - E. Turillazzi
- Institute of Forensic Pathology, Department of Clinical and Experimental Medicine, University of Foggia, Ospedale Colonnello D'Avanzo, Viale degli Aviatori 1, 71100 Foggia, Italy
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