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Mu CT, Lin YJ, Chen CH, Hsia SH, Lin JJ, Chan OW, Yen CW, Chiu CC, Chang HP, Su YT, Lee EP. Diastolic/systolic blood pressure ratio for predicting febrile children with sepsis and progress to septic shock in the emergency department. BMC Emerg Med 2024; 24:78. [PMID: 38693496 PMCID: PMC11064385 DOI: 10.1186/s12873-024-00995-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 04/24/2024] [Indexed: 05/03/2024] Open
Abstract
OBJECTIVE Given the scarcity of studies analyzing the clinical predictors of pediatric septic cases that would progress to septic shock, this study aimed to determine strong predictors for pediatric emergency department (PED) patients with sepsis at risk for septic shock and mortality. METHODS We conducted chart reviews of patients with ≥ 2 age-adjusted quick Sequential Organ Failure Assessment score (qSOFA) criteria to recognize patients with an infectious disease in two tertiary PEDs between January 1, 2021, and April 30, 2022. The age range of included patients was 1 month to 18 years. The primary outcome was development of septic shock within 48 h of PED attendance. The secondary outcome was sepsis-related 28-day mortality. Initial important variables in the PED and hemodynamics with the highest and lowest values during the first 24 h of admission were also analyzed. RESULTS Overall, 417 patients were admitted because of sepsis and met the eligibility criteria for the study. Forty-nine cases progressed to septic shock within 48 h after admission and 368 were discharged without progression. General demographics, laboratory data, and hemodynamics were analyzed by multivariate analysis. Only the minimum diastolic blood pressure/systolic blood pressure ratio (D/S ratio) during the first 24 h after admission remained as an independent predictor of progression to septic shock and 28-day mortality. The best cutoff values of the D/S ratio for predicting septic shock and 28-day mortality were 0.52 and 0.47, respectively. CONCLUSIONS The D/S ratio is a practical bedside scoring system in the PED and had good discriminative ability in predicting the progression of septic shock and in-hospital mortality in PED patients. Further validation is essential in other settings.
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Affiliation(s)
- Chun-Ting Mu
- Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Ying-Jui Lin
- Department of Pediatrics, Chang Gung Memorial Hospital at Kaohsiung, Kaohsiung, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chih-Ho Chen
- Department of Pediatrics, Chang Gung Memorial Hospital at Kaohsiung, Kaohsiung, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shao-Hsuan Hsia
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Chang Gung Memorial Hospital at Linko, No. 5, Fu-Hsin Street, Kweishan, Taoyuan, Taiwan
| | - Jainn-Jim Lin
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Chang Gung Memorial Hospital at Linko, No. 5, Fu-Hsin Street, Kweishan, Taoyuan, Taiwan
- Division of Pediatric Neurology, Chang Gung Children's Hospital, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Oi-Wa Chan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Chang Gung Memorial Hospital at Linko, No. 5, Fu-Hsin Street, Kweishan, Taoyuan, Taiwan
| | - Chen-Wei Yen
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Division of Nephrology, Department of Pediatrics, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Chun-Che Chiu
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Pediatrics, Tucheng Composite Municipal Hospital, New Taipei City, Taiwan
| | - Han-Pi Chang
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Chang Gung Memorial Hospital at Linko, No. 5, Fu-Hsin Street, Kweishan, Taoyuan, Taiwan
| | - Ya-Ting Su
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Division of Pediatric Endocrinology and Genetics, Department of Pediatrics, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - En-Pei Lee
- College of Medicine, Chang Gung University, Taoyuan, Taiwan.
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Chang Gung Memorial Hospital at Linko, No. 5, Fu-Hsin Street, Kweishan, Taoyuan, Taiwan.
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2
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Sahoo DK, Wong D, Patani A, Paital B, Yadav VK, Patel A, Jergens AE. Exploring the role of antioxidants in sepsis-associated oxidative stress: a comprehensive review. Front Cell Infect Microbiol 2024; 14:1348713. [PMID: 38510969 PMCID: PMC10952105 DOI: 10.3389/fcimb.2024.1348713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 02/15/2024] [Indexed: 03/22/2024] Open
Abstract
Sepsis is a potentially fatal condition characterized by organ dysfunction caused by an imbalanced immune response to infection. Although an increased inflammatory response significantly contributes to the pathogenesis of sepsis, several molecular mechanisms underlying the progression of sepsis are associated with increased cellular reactive oxygen species (ROS) generation and exhausted antioxidant pathways. This review article provides a comprehensive overview of the involvement of ROS in the pathophysiology of sepsis and the potential application of antioxidants with antimicrobial properties as an adjunct to primary therapies (fluid and antibiotic therapies) against sepsis. This article delves into the advantages and disadvantages associated with the utilization of antioxidants in the therapeutic approach to sepsis, which has been explored in a variety of animal models and clinical trials. While the application of antioxidants has been suggested as a potential therapy to suppress the immune response in cases where an intensified inflammatory reaction occurs, the use of multiple antioxidant agents can be beneficial as they can act additively or synergistically on different pathways, thereby enhancing the antioxidant defense. Furthermore, the utilization of immunoadjuvant therapy, specifically in septic patients displaying immunosuppressive tendencies, represents a promising advancement in sepsis therapy.
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Affiliation(s)
- Dipak Kumar Sahoo
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - David Wong
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Anil Patani
- Department of Biotechnology, Smt. S. S. Patel Nootan Science and Commerce College, Sankalchand Patel University, Gujarat, India
| | - Biswaranjan Paital
- Redox Regulation Laboratory, Department of Zoology, College of Basic Science and Humanities, Odisha University of Agriculture and Technology, Bhubaneswar, India
| | - Virendra Kumar Yadav
- Department of Life Sciences, Hemchandracharya North Gujarat University, Gujarat, India
| | - Ashish Patel
- Department of Life Sciences, Hemchandracharya North Gujarat University, Gujarat, India
| | - Albert E. Jergens
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
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3
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Juha M, Molnár A, Jakus Z, Ledó N. NETosis: an emerging therapeutic target in renal diseases. Front Immunol 2023; 14:1253667. [PMID: 37744367 PMCID: PMC10514582 DOI: 10.3389/fimmu.2023.1253667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 08/15/2023] [Indexed: 09/26/2023] Open
Abstract
Introduction Neutrophil extracellular traps (NETs) are web-like structures composed of nuclear and granular components. The primary role of NETS is to prevent the dissemination of microbes and facilitate their elimination. However, this process is accompanied by collateral proinflammatory adverse effects when the NET release becomes uncontrollable, or clearance is impaired. Although NET-induced organ damage is conducted primarily and indirectly via immune complexes and the subsequent release of cytokines, their direct effects on cells are also remarkable. NETosis plays a critical pathogenic role in several renal disorders, such as the early phase of acute tubular necrosis, anti-neutrophil cytoplasmic antibody-mediated renal vasculitis, lupus nephritis, thrombotic microangiopathies, anti-glomerular basement membrane disease, and diabetic nephropathy. Their substantial contribution in the course of these disorders makes them a desirable target in the therapeutic armamentarium. This article gives an in-depth review of the heterogeneous pathogenesis and physiological regulations of NETosis and its pivotal role in renal diseases. Based on the pathogenesis, the article also outlines the current therapeutic options and possible molecular targets in the treatment of NET-related renal disorders. Methods We carried out thorough literature research published in PubMed and Google Scholar, including a comprehensive review and analysis of the classification, pathomechanisms, and a broad spectrum of NET-related kidney disorders. Conclusions NETosis plays a pivotal role in certain renal diseases. It initiates and maintains inflammatory and autoimmune disorders, thus making it a desirable target for improving patient and renal outcomes. Better understanding and clinical translation of the pathogenesis are crucial aspects to treatment, for improving patient, and renal outcomes.
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Affiliation(s)
- Márk Juha
- Department of Internal Medicine and Oncology, Semmelweis University, Budapest, Hungary
| | - Adél Molnár
- Department of Internal Medicine and Oncology, Semmelweis University, Budapest, Hungary
| | - Zoltán Jakus
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Nóra Ledó
- Department of Internal Medicine and Oncology, Semmelweis University, Budapest, Hungary
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4
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Potential Antioxidant Multitherapy against Complications Occurring in Sepsis. Biomedicines 2022; 10:biomedicines10123088. [PMID: 36551843 PMCID: PMC9775396 DOI: 10.3390/biomedicines10123088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/05/2022] [Accepted: 11/10/2022] [Indexed: 12/03/2022] Open
Abstract
Septic shock currently represents one of the main causes of mortality in critical patient units with an increase in its incidence in recent years, and it is also associated with a high burden of morbidity in surviving patients. Within the pathogenesis of sepsis, oxidative stress plays an important role. The excessive formation of reactive oxygen species (ROS) leads to mitochondrial damage and vasomotor dysfunction that characterizes those patients who fall into septic shock. Currently, despite numerous studies carried out in patients with septic shock of different causes, effective therapies have not yet been developed to reduce the morbidity and mortality associated with this pathology. Despite the contribution of ROS in the pathophysiology of sepsis and septic shock, most studies performed in humans, with antioxidant monotherapies, have not resulted in promising data. Nevertheless, some interventions with compounds such as ascorbate, N-acetylcysteine, and selenium would have a positive effect in reducing the morbidity and mortality associated with this pathology. However, more studies are required to demonstrate the efficacy of these therapies. Taking into account the multifactorial features of the pathophysiology of sepsis, we put forward the hypothesis that a supplementation based on the association of more than one antioxidant compound should result in a synergistic or additive effect, thus improving the beneficial effects of each of them alone, potentially serving as a pharmacological adjunct resource to standard therapy to reduce sepsis complications. Therefore, in this review, it is proposed that the use of combined antioxidant therapies could lead to a better clinical outcome of patients with sepsis or septic shock, given the relevance of oxidative stress in the pathogenesis of this multi-organ dysfunction.
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5
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Nejati M, Dehghan P, Jamilian P, Zarezadeh M. The effects of N-acetylcysteine on recovery biomarkers: A systematic review and meta-analysis of controlled trials. J Food Biochem 2022; 46:e14116. [PMID: 35261035 DOI: 10.1111/jfbc.14116] [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: 10/31/2021] [Revised: 02/04/2022] [Accepted: 02/07/2022] [Indexed: 11/30/2022]
Abstract
N-acetylcysteine (NAC) is one of the antioxidant supplements which is thought to improve recovery. Existing studies regarding NAC and recovery presented conflicting results. This systematic review and meta-analysis evaluated the existing trials and determined the efficacy of acute and chronic NAC administration on recovery biomarkers. PubMed, Web of Science, and Scopus were searched up to July 2021. The random effects or fixed effects model was applied in the meta-analysis. Sensitivity and subgroup analyses were performed. In case of the presence of publication bias, standard methods were applied. The meta-analysis comprised 37 papers (1,388 participants). All included studies were in English language. Acute NAC administration indicated no significant effects on lactate, pH, VO2 , and CPK-MB ([SMD = -0.06 mmol/L; 95% CI: -0.40, 0.28; p = .714], [SMD = 0.17; 95% CI: -0.28, 0.62; p = .454], [SMD = -0.11 L/min; 95% CI: -0.63, 0.41; p = .686], and [SMD = -0.19 units/L; 95% CI: -0.62, 0.24; p = .395]). Additionally, no evidence of significant influence of chronic NAC administration on lactate, pH, VO2 , and CK was revealed ([SMD = 0.01 mmol/L; 95% CI: -0.25, 0.27; p = .950], [SMD = -0.51; 95% CI: -1.73, 0.70; p = .424], [SMD = -0.18 L/min; 95% CI: -0.56, 0.20; p = .361], and [SMD = -0.04 units/L; 95% CI: -0.36, 0.29; p = .821]). No considerable effect of NAC on recovery was found. PRACTICAL APPLICATIONS: Previous studies on the influence of NAC administration on recovery biomarkers have presented conflicting results. This systematic review and meta-analysis offers a broad range of detailed information on the influence of chronic and acute NAC supplementation outcomes regarding recovery biomarkers. Overall, the results support that NAC supplementation may not be effective in improving recovery biomarkers. However, subgroup analyses based on NAC dosage indicated the meaningful effect of NAC on CK-MB at the dosage of ≥100 mg/kg.
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Affiliation(s)
- Marzieh Nejati
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Nutrition Research Center, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parvin Dehghan
- Nutrition Research Center, Department of Biochemistry and Diet Therapy, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parsa Jamilian
- Keele Medical School, Keele University, Staffordshire, UK
| | - Meysam Zarezadeh
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Clinical Nutrition, School of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
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6
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Ow CPC, Trask-Marino A, Betrie AH, Evans RG, May CN, Lankadeva YR. Targeting Oxidative Stress in Septic Acute Kidney Injury: From Theory to Practice. J Clin Med 2021; 10:jcm10173798. [PMID: 34501245 PMCID: PMC8432047 DOI: 10.3390/jcm10173798] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/17/2021] [Accepted: 08/23/2021] [Indexed: 12/17/2022] Open
Abstract
Sepsis is the leading cause of acute kidney injury (AKI) and leads to increased morbidity and mortality in intensive care units. Current treatments for septic AKI are largely supportive and are not targeted towards its pathophysiology. Sepsis is commonly characterized by systemic inflammation and increased production of reactive oxygen species (ROS), particularly superoxide. Concomitantly released nitric oxide (NO) then reacts with superoxide, leading to the formation of reactive nitrogen species (RNS), predominantly peroxynitrite. Sepsis-induced ROS and RNS can reduce the bioavailability of NO, mediating renal microcirculatory abnormalities, localized tissue hypoxia and mitochondrial dysfunction, thereby initiating a propagating cycle of cellular injury culminating in AKI. In this review, we discuss the various sources of ROS during sepsis and their pathophysiological interactions with the immune system, microcirculation and mitochondria that can lead to the development of AKI. We also discuss the therapeutic utility of N-acetylcysteine and potential reasons for its efficacy in animal models of sepsis, and its inefficacy in ameliorating oxidative stress-induced organ dysfunction in human sepsis. Finally, we review the pre-clinical studies examining the antioxidant and pleiotropic actions of vitamin C that may be of benefit for mitigating septic AKI, including future implications for clinical sepsis.
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Affiliation(s)
- Connie P. C. Ow
- Preclinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, Melbourne, VIC 3052, Australia; (C.P.C.O.); (A.T.-M.); (A.H.B.); (R.G.E.); (C.N.M.)
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka 564-8565, Japan
| | - Anton Trask-Marino
- Preclinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, Melbourne, VIC 3052, Australia; (C.P.C.O.); (A.T.-M.); (A.H.B.); (R.G.E.); (C.N.M.)
| | - Ashenafi H. Betrie
- Preclinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, Melbourne, VIC 3052, Australia; (C.P.C.O.); (A.T.-M.); (A.H.B.); (R.G.E.); (C.N.M.)
- Melbourne Dementia Research Centre, Florey Institute of Neuroscience and Mental Health, Melbourne, VIC 3052, Australia
| | - Roger G. Evans
- Preclinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, Melbourne, VIC 3052, Australia; (C.P.C.O.); (A.T.-M.); (A.H.B.); (R.G.E.); (C.N.M.)
- Cardiovascular Disease Program, Biomedicine Discovery Institute and Department of Physiology, Monash University, Melbourne, VIC 3800, Australia
| | - Clive N. May
- Preclinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, Melbourne, VIC 3052, Australia; (C.P.C.O.); (A.T.-M.); (A.H.B.); (R.G.E.); (C.N.M.)
- Department of Critical Care, Melbourne Medical School, University of Melbourne, Melbourne, VIC 3052, Australia
| | - Yugeesh R. Lankadeva
- Preclinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, Melbourne, VIC 3052, Australia; (C.P.C.O.); (A.T.-M.); (A.H.B.); (R.G.E.); (C.N.M.)
- Department of Critical Care, Melbourne Medical School, University of Melbourne, Melbourne, VIC 3052, Australia
- Correspondence: ; Tel.: +61-3-8344-0417; Fax: +61-3-9035-3107
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Rinehart J, Lee S, Saugel B, Joosten A. Automated Blood Pressure Control. Semin Respir Crit Care Med 2020; 42:47-58. [PMID: 32746471 DOI: 10.1055/s-0040-1713083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Arterial pressure management is a crucial task in the operating room and intensive care unit. In high-risk surgical and in critically ill patients, sustained hypotension is managed with continuous infusion of vasopressor agents, which most commonly have direct α agonist activity like phenylephrine or norepinephrine. The current standard of care to guide vasopressor infusion is manual titration to an arterial pressure target range. This approach may be improved by using automated systems that titrate vasopressor infusions to maintain a target pressure. In this article, we review the evidence behind blood pressure management in the operating room and intensive care unit and discuss current and potential future applications of automated blood pressure control.
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Affiliation(s)
- Joseph Rinehart
- Department of Anesthesiology and Perioperative Care, University of California Irvine, Orange, California
| | - Sean Lee
- Department of Anesthesiology and Perioperative Care, University of California Irvine, Orange, California
| | - Bernd Saugel
- Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Outcomes Research Consortium, Cleveland, Ohio
| | - Alexandre Joosten
- Department of Anesthesiology, Erasme Hospital, Brussels, Belgium.,Department of Anesthesiology and Intensive Care, Hôpitaux Universitaires Paris-Sud, Université Paris-Sud, Université Paris-Saclay, Hôpital De Bicêtre, Assistance Publique Hôpitaux de Paris (AP-HP), Le Kremlin-Bicêtre, France
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8
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Is Antioxidant Therapy a Useful Complementary Measure for Covid-19 Treatment? An Algorithm for Its Application. ACTA ACUST UNITED AC 2020; 56:medicina56080386. [PMID: 32752010 PMCID: PMC7466376 DOI: 10.3390/medicina56080386] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/20/2020] [Accepted: 07/23/2020] [Indexed: 02/06/2023]
Abstract
Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) causes the corona virus disease-19 which is accompanied by severe pneumonia, pulmonary alveolar collapses and which stops oxygen exchange. Viral transmissibility and pathogenesis depend on recognition by a receptor in the host, protease cleavage of the host membrane and fusion. SARS-CoV-2 binds to the angiotensin converting enzyme 2 receptor. Here, we discuss the general characteristics of the virus, its mechanism of action and the way in which the mechanism correlates with the comorbidities that increase the death rate. We also discuss the currently proposed therapeutic measures and propose the use of antioxidant drugs to help patients infected with the SARS-CoV-2. Oxidizing agents come from phagocytic leukocytes such as neutrophils, monocytes, macrophages and eosinophils that invade tissue. Free radicals promote cytotoxicity thus injuring cells. They also trigger the mechanism of inflammation by mediating the activation of NFkB and inducing the transcription of cytokine production genes. Release of cytokines enhances the inflammatory response. Oxidative stress is elevated during critical illnesses and contributes to organ failure. In corona virus disease-19 there is an intense inflammatory response known as a cytokine storm that could be mediated by oxidative stress. Although antioxidant therapy has not been tested in corona virus disease-19, the consequences of antioxidant therapy in sepsis, acute respiratory distress syndrome and acute lung injury are known. It improves oxygenation rates, glutathione levels and strengthens the immune response. It reduces mechanical ventilation time, the length of stay in the intensive care unit, multiple organ dysfunctions and the length of stay in the hospital and mortality rates in acute lung injury/acute respiratory distress syndrome and could thus help patients with corona virus disease-19.
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9
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Trials and tribulations of diagnosing and preventing contrast-induced acute kidney injury. J Thorac Cardiovasc Surg 2020; 162:1581-1586. [DOI: 10.1016/j.jtcvs.2020.06.147] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 11/22/2022]
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10
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Ospina-Tascón GA, Teboul JL, Hernandez G, Alvarez I, Sánchez-Ortiz AI, Calderón-Tapia LE, Manzano-Nunez R, Quiñones E, Madriñan-Navia HJ, Ruiz JE, Aldana JL, Bakker J. Diastolic shock index and clinical outcomes in patients with septic shock. Ann Intensive Care 2020; 10:41. [PMID: 32296976 PMCID: PMC7160223 DOI: 10.1186/s13613-020-00658-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 04/04/2020] [Indexed: 01/15/2023] Open
Abstract
Background Loss of vascular tone is a key pathophysiological feature of septic shock. Combination of gradual diastolic hypotension and tachycardia could reflect more serious vasodilatory conditions. We sought to evaluate the relationships between heart rate (HR) to diastolic arterial pressure (DAP) ratios and clinical outcomes during early phases of septic shock. Methods Diastolic shock index (DSI) was defined as the ratio between HR and DAP. DSI calculated just before starting vasopressors (Pre-VPs/DSI) in a preliminary cohort of 337 patients with septic shock (January 2015 to February 2017) and at vasopressor start (VPs/DSI) in 424 patients with septic shock included in a recent randomized controlled trial (ANDROMEDA-SHOCK; March 2017 to April 2018) was partitioned into five quantiles to estimate the relative risks (RR) of death with respect to the mean risk of each population (assumed to be 1). Matched HR and DAP subsamples were created to evaluate the effect of the individual components of the DSI on RRs. In addition, time-course of DSI and interaction between DSI and vasopressor dose (DSI*NE.dose) were compared between survivors and non-survivors from both populations, while ROC curves were used to identify variables predicting mortality. Finally, as exploratory observation, effect of early start of vasopressors was evaluated at each Pre-VPs/DSI quintile from the preliminary cohort. Results Risk of death progressively increased at gradual increments of Pre-VPs/DSI or VPs/DSI (One-way ANOVA, p < 0.001). Progressive DAP decrease or HR increase was associated with higher mortality risks only when DSI concomitantly increased. Areas under the ROC curve for Pre-VPs/DSI, SOFA and initial lactate were similar, while mean arterial pressure and systolic shock index showed poor performances to predict mortality. Time-course of DSI and DSI*NE.dose was significantly higher in non-survivors from both populations (repeated-measures ANOVA, p < 0.001). Very early start of vasopressors exhibited an apparent benefit at higher Pre-VPs/DSI quintile. Conclusions DSI at pre-vasopressor and vasopressor start points might represent a very early identifier of patients at high risk of death. Isolated DAP or HR values do not clearly identify such risk. Usefulness of DSI to trigger or to direct therapeutic interventions in early resuscitation of septic shock need to be addressed in future studies.
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Affiliation(s)
- Gustavo A Ospina-Tascón
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia. .,Traslational Medicine in Critical Care and Experimental Surgery Laboratory (TransLab-CCM), Universidad ICESI, Cali, Colombia.
| | - Jean-Louis Teboul
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia.,Service de Réanimation Médicale, Hôpital Bicêtre, Hôpitaux Universitaires Paris-Sud, Paris, France.,Assistance Publique Hôpitaux de Paris, Université Paris-Sud, Paris, France
| | - Glenn Hernandez
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia.,Departamento de Medicina Intensiva, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Ingrid Alvarez
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia
| | - Alvaro I Sánchez-Ortiz
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia
| | - Luis E Calderón-Tapia
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia
| | - Ramiro Manzano-Nunez
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia
| | - Edgardo Quiñones
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia
| | - Humberto J Madriñan-Navia
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia
| | - Juan E Ruiz
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia
| | - José L Aldana
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia
| | - Jan Bakker
- Department of Intensive Care Medicine, Fundación Valle del Lili - Universidad ICESI, Av. Simón Bolívar Cra. 98, Cali, Colombia.,Departamento de Medicina Intensiva, Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Intensive Care Adults, Erasmus MC University Medical Center, Rotterdam, The Netherlands.,Department of Pulmonary and Critical Care, New York University, New York, USA.,Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University Medical Center, New York, USA
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11
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Šalamon Š, Kramar B, Marolt TP, Poljšak B, Milisav I. Medical and Dietary Uses of N-Acetylcysteine. Antioxidants (Basel) 2019; 8:antiox8050111. [PMID: 31035402 PMCID: PMC6562654 DOI: 10.3390/antiox8050111] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/09/2019] [Accepted: 04/23/2019] [Indexed: 02/06/2023] Open
Abstract
N-acetylcysteine (NAC), a plant antioxidant naturally found in onion, is a precursor to glutathione. It has been used as a drug since the 1960s and is listed on the World Health Organization (WHO) Model List of Essential Medicines as an antidote in poisonings. There are numerous other uses or proposed uses in medicine that are still in preclinical and clinical investigations. NAC is also used in food supplements and cosmetics. Despite its abundant use, there are projections that the NAC global market will grow in the next five years; therefore, the purpose of this work is to provide a balanced view of further uses of NAC as a dietary supplement. Although NAC is considered a safe substance, the results among clinical trials are sometimes controversial or incomplete, like for many other antioxidants. More clinical trials are underway that will improve our understanding of NAC applicability.
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Affiliation(s)
- Špela Šalamon
- Center for human molecular genetics and pharmacogenomics, Faculty of Medicine, University of Maribor, SI-2000 Maribor, Slovenia.
| | - Barbara Kramar
- Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Zaloška 4, SI-1000 Ljubljana, Slovenia.
| | - Tinkara Pirc Marolt
- Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Zaloška 4, SI-1000 Ljubljana, Slovenia.
| | - Borut Poljšak
- University of Ljubljana, Faculty of Health Sciences, Laboratory of Oxidative Stress Research, Zdravstvena pot 5, SI-1000 Ljubljana, Slovenia.
| | - Irina Milisav
- Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Zaloška 4, SI-1000 Ljubljana, Slovenia.
- University of Ljubljana, Faculty of Health Sciences, Laboratory of Oxidative Stress Research, Zdravstvena pot 5, SI-1000 Ljubljana, Slovenia.
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Peivandi Yazdi A, Razavi M, Sheikh S, Boroumand N, Salehi M, Hashemy SI. Clinical Trial Assessment of Intermittent and Continuous Infusion Dose of N-Acetylcysteine on Redox Status of the Body in Patients with Sepsis Admitted to the ICU. J Intensive Care Med 2019; 35:1383-1388. [PMID: 30636490 DOI: 10.1177/0885066618823152] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE Conflicting results exist regarding the efficacy of N-acetyl cysteine (NAC) in sepsis treatment. A pivotal factor affecting the therapeutic potency of NAC in sepsis is timing and dosing of its infusion. We aimed to assess the effect of NAC on redox status of patients with sepsis and to compare its efficacy in intermittent and continuous infusion with the objective of developing the infusion regimen and optimizing the timing. MATERIALS AND METHODS A prospective, randomized clinical trial was designed to compare the antioxidative effect of NAC in intermittent infusion group (IV: 25 mg/kg bolus and then 25 mg/kg/8 hours 3 times) and continuous infusion group (IV: 25 mg/kg bolus and then 75 mg/kg over 24 hours) in 60 critically ill patients with sepsis (20 patients in each group). Blood samples were collected immediately before and after intervention for total antioxidant capacity (TAC) and malondialdehyde (MDA) assessment. RESULTS N-acetyl cysteine considerably increased TAC levels in both intermittent (0.68 ± 0.60; P value = .036) and continuous (0.69 ± 0.64; P value = .015) infusion groups when compared to placebo (0.61 ± 0.10); however, the difference in TAC levels between the intermittent and the continuous infusion did not reach statistical significance (P value = .942). Likewise, NAC treatment decreased MDA levels in both intermittent (19.45 ± 4.18; P value = 0.001) and continuous (22.47 ± 6.68; P value = .002) infusion groups when compared to placebo (31.76 ± 11.06), while the difference in MDA levels between the intermittent and the continuous infusion did not reach statistical significance (P value = .481). CONCLUSION Our data confirmed the antioxidative effect of NAC treatment in patients with sepsis, with no significant difference in intermittent and continuous infusion.
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Affiliation(s)
- Arash Peivandi Yazdi
- Lung Diseases Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Majid Razavi
- Lung Diseases Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Shahrzad Sheikh
- Lung Diseases Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Nadia Boroumand
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam Salehi
- Clinical Research Unit, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Research Center for Patient Safety, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Isaac Hashemy
- Surgical Oncology Research Centre, Mashhad University of Medical Sciences, Mashhad, Iran
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Cysteine/Glutathione Deficiency: A Significant and Treatable Corollary of Disease. THE THERAPEUTIC USE OF N-ACETYLCYSTEINE (NAC) IN MEDICINE 2019. [PMCID: PMC7120747 DOI: 10.1007/978-981-10-5311-5_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Glutathione (GSH) deficiency may play a pivotal role in a variety of apparently unrelated clinical conditions and diseases. Orally administered N-acetylcysteine (NAC), which replenishes the cysteine required for GSH synthesis, has been tested in a large number of randomized placebo-controlled trials involving these diseases and conditions. This chapter focused on developing a base of evidence suggesting that NAC administration improves disease by increasing cysteine and/or GSH in a variety of diseases, thereby implying a significant role for GSH deficiency in the clinical basis of many diseases. To develop this base of evidence, we systematically selected studies which considered the hypothesis that the therapeutic efficacy for NAC is an indication that cysteine and/or GSH deficiency is a pathophysiological part of the diseases studied. In this manner we focus this chapter on explaining the biological mechanisms of NAC therapy in a wide variety of disorders and demonstrate its ubiquitous role in improving disease that involves disrupted GSH and/or cysteine metabolism.
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Rinehart J, Joosten A, Ma M, Calderon MD, Cannesson M. Closed-loop vasopressor control: in-silico study of robustness against pharmacodynamic variability. J Clin Monit Comput 2018; 33:795-802. [PMID: 30539349 DOI: 10.1007/s10877-018-0234-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 12/06/2018] [Indexed: 12/28/2022]
Abstract
Initial feasibility of a novel closed-loop controller created by our group for closed-loop control of vasopressor infusions has been previously described. In clinical practice, vasopressor potency may be affected by a variety of factors including other pharmacologic agents, organ dysfunction, and vasoplegic states. The purpose of this study was therefore to evaluate the effectiveness of our controller in the face of large variations in drug potency, where 'effective' was defined as convergence on target pressure over time. We hypothesized that the controller would remain effective in the face up to a tenfold variability in drug response. To perform the robustness study, our physiologic simulator was used to create randomized simulated septic patients. 250 simulated patients were managed by the closed-loop in each of 7 norepinephrine responsiveness conditions: 0.1 ×, 0.2 ×, 0.5 ×, 1 ×, 2 ×, 5 ×, and 10 × expected population response to drug dose. Controller performance was evaluated for each level of norepinephrine response using Varvel's criteria as well as time-out-of-target. Median performance error and median absolute performance error were less than 5% in all response levels. Wobble was below 3% and divergence remained negative (i.e. the controller tended to converge towards the target over time) in all norepinephrine response levels, but at the highest response level of 10 × the value approached zero, suggesting the controller may be approaching instability. Response levels of 0.1 × and 0.2 × exhibited significantly higher time-out-of-target in the lower ranges (p < 0.001) compared to the 1 × response level as the controller was slower to correct the initial hypotension. In this simulation study, the closed-loop vasopressor controller remained effective in simulated patients exhibiting 0.1 to 10 × the expected population drug response.
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Affiliation(s)
- Joseph Rinehart
- Department of Anesthesiology & Perioperative Care, University of California Irvine, 101 The City Drive South, Orange, CA, 92868, USA.
| | - Alexandre Joosten
- Department of Anesthesiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.,Anesthesia and Intensive Care Department, Hôpitaux Universitaires Paris-Sud, Université Paris-Sud, Université Paris-Saclay, Hôpital De Bicêtre, Assistance Publique Hôpitaux de Paris (APHP), 78, Rue du Général Leclerc, 94270, Le Kremlin-Bicêtre, France
| | - Michael Ma
- Department of Anesthesiology & Perioperative Care, University of California Irvine, 101 The City Drive South, Orange, CA, 92868, USA
| | - Michael-David Calderon
- Department of Anesthesiology & Perioperative Care, University of California Irvine, 101 The City Drive South, Orange, CA, 92868, USA
| | - Maxime Cannesson
- Department of Anesthesiology and Perioperative Medicine, Davide Geffen School of Medicine, University of California Los Angeles UCLA, Los Angeles, CA, USA
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Joannidis M, Druml W, Forni LG, Groeneveld ABJ, Honore PM, Hoste E, Ostermann M, Oudemans-van Straaten HM, Schetz M. Prevention of acute kidney injury and protection of renal function in the intensive care unit: update 2017 : Expert opinion of the Working Group on Prevention, AKI section, European Society of Intensive Care Medicine. Intensive Care Med 2017; 43:730-749. [PMID: 28577069 PMCID: PMC5487598 DOI: 10.1007/s00134-017-4832-y] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 05/02/2017] [Indexed: 12/19/2022]
Abstract
BACKGROUND Acute kidney injury (AKI) in the intensive care unit is associated with significant mortality and morbidity. OBJECTIVES To determine and update previous recommendations for the prevention of AKI, specifically the role of fluids, diuretics, inotropes, vasopressors/vasodilators, hormonal and nutritional interventions, sedatives, statins, remote ischaemic preconditioning and care bundles. METHOD A systematic search of the literature was performed for studies published between 1966 and March 2017 using these potential protective strategies in adult patients at risk of AKI. The following clinical conditions were considered: major surgery, critical illness, sepsis, shock, exposure to potentially nephrotoxic drugs and radiocontrast. Clinical endpoints included incidence or grade of AKI, the need for renal replacement therapy and mortality. Studies were graded according to the international GRADE system. RESULTS We formulated 12 recommendations, 13 suggestions and seven best practice statements. The few strong recommendations with high-level evidence are mostly against the intervention in question (starches, low-dose dopamine, statins in cardiac surgery). Strong recommendations with lower-level evidence include controlled fluid resuscitation with crystalloids, avoiding fluid overload, titration of norepinephrine to a target MAP of 65-70 mmHg (unless chronic hypertension) and not using diuretics or levosimendan for kidney protection solely. CONCLUSION The results of recent randomised controlled trials have allowed the formulation of new recommendations and/or increase the strength of previous recommendations. On the other hand, in many domains the available evidence remains insufficient, resulting from the limited quality of the clinical trials and the poor reporting of kidney outcomes.
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Affiliation(s)
- M Joannidis
- Division of Intensive Care and Emergency Medicine, Department of Internal Medicine, Medical University Innsbruck, Anichstasse 35, 6020, Innsbruck, Austria.
| | - W Druml
- Department of Internal Medicine III, University Hospital Vienna, Vienna, Austria
| | - L G Forni
- Department of Clinical and Experimental Medicine, Faculty of Health and Medical Sciences, University of Surrey and Surrey Perioperative Anaesthesia and Critical Care Collaborative Research Group (SPACeR), Intensive Care Unit, Royal Surrey County Hospital NHS Foundation Trust, Egerton Road, Guildford, GU2 7XX, United Kingdom
| | | | - P M Honore
- Department of Intensive Care, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - E Hoste
- Department of Intensive Care Medicine, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium
| | - M Ostermann
- Department of Critical Care and Nephrology, Guy's and St Thomas' Hospital, London, United Kingdom
| | - H M Oudemans-van Straaten
- Department of Adult Intensive Care, VU University Medical Centre, De Boelelaan 1118, 1081 HZ, Amsterdam, The Netherlands
| | - M Schetz
- Clinical Department and Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, KU Leuven University, Leuven, Belgium
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Chertoff J. N-Acetylcysteine's Role in Sepsis and Potential Benefit in Patients With Microcirculatory Derangements. J Intensive Care Med 2017; 33:87-96. [PMID: 28299952 DOI: 10.1177/0885066617696850] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To review the data surrounding the utility of N-acetylcysteine (NAC) in sepsis and identify areas needed for additional research. DATA SOURCES A review of articles describing the mechanisms of action and clinical use of NAC in sepsis. SUMMARY OF REVIEW Despite many advances in critical care medicine, still as many as 50% of patients with septic shock die. Treatments thus far have focused on resuscitation and restoration of macrocirculatory targets in the early phases of sepsis, with less focus on microcirculatory dysfunction. N-acetylcysteine, due to its anti-inflammatory and antioxidative properties, has been readily investigated in sepsis and has yielded largely incongruous and disappointing results. In addition to its known anti-inflammatory and antioxidative roles, one underappreciated property of NAC is its ability to vasodilate the microcirculation and improve locoregional blood flow. Some investigators have sought to capitalize on this mechanism with promising results, as evidenced by microcirculatory vasodilation, improvements in regional blood flow and oxygen delivery, and reductions in lactic acidosis, organ failure, and mortality. CONCLUSION In addition to its antioxidant and anti-inflammatory properties, N-acetylcysteine possesses vasodilatory properties that could benefit the microcirculation in sepsis. It is imperative that we investigate these properties to uncover NAC's full potential for benefit in sepsis.
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Affiliation(s)
- Jason Chertoff
- 1 Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Florida College of Medicine, Gainesville, FL, USA
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17
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Effects of N-acetylcysteine (NAC) supplementation in resuscitation fluids on renal microcirculatory oxygenation, inflammation, and function in a rat model of endotoxemia. Intensive Care Med Exp 2016; 4:29. [PMID: 27671340 PMCID: PMC5037099 DOI: 10.1186/s40635-016-0106-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 09/20/2016] [Indexed: 12/18/2022] Open
Abstract
Background Modulation of inflammation and oxidative stress appears to limit sepsis-induced damage in experimental models. The kidney is one of the most sensitive organs to injury during septic shock. In this study, we evaluated the effect of N-acetylcysteine (NAC) administration in conjunction with fluid resuscitation on renal oxygenation and function. We hypothesized that reducing inflammation would improve the microcirculatory oxygenation in the kidney and limit the onset of acute kidney injury (AKI). Methods Rats were randomized into five groups (n = 8 per group): (1) control group, (2) control + NAC, (3) endotoxemic shock with lipopolysaccharide (LPS) without fluids, (4) LPS + fluid resuscitation, and (5) LPS + fluid resuscitation + NAC (150 mg/kg/h). Fluid resuscitation was initiated at 120 min and maintained at fixed volume for 2 h with hydroxyethyl starch (HES 130/0.4) dissolved in acetate-balanced Ringer’s solution (Volulyte) with or without supplementation with NAC (150 mg/kg/h). Oxygen tension in the renal cortex (CμPO2), outer medulla (MμPO2), and renal vein was measured using phosphorimetry. Biomarkers of renal injury, inflammation, and oxidative stress were assessed in kidney tissues. Results Fluid resuscitation significantly improved the systemic and renal macrohemodynamic parameters after LPS. However, the addition of NAC further improved cortical renal oxygenation, oxygen delivery, and oxygen consumption (p < 0.05). NAC supplementation dampened the accumulation of NGAL or L-FABP, hyaluronic acid, and nitric oxide in kidney tissue (p < 0.01). Conclusion The addition of NAC to fluid resuscitation may improve renal oxygenation and attenuate microvascular dysfunction and AKI. Decreases in renal NO and hyaluronic acid levels may be involved in this beneficial effect. A therapeutic strategy combining initial fluid resuscitation with antioxidant therapies may prevent sepsis-induced AKI.
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18
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Jenkins DD, Wiest DB, Mulvihill DM, Hlavacek AM, Majstoravich SJ, Brown TR, Taylor JJ, Buckley JR, Turner RP, Rollins LG, Bentzley JP, Hope KE, Barbour AB, Lowe DW, Martin RH, Chang EY. Fetal and Neonatal Effects of N-Acetylcysteine When Used for Neuroprotection in Maternal Chorioamnionitis. J Pediatr 2016; 168:67-76.e6. [PMID: 26545726 PMCID: PMC4698030 DOI: 10.1016/j.jpeds.2015.09.076] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 08/25/2015] [Accepted: 09/29/2015] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To evaluate the clinical safety of antenatal and postnatal N-acetylcysteine (NAC) as a neuroprotective agent in maternal chorioamnionitis in a randomized, controlled, double-blinded trial. STUDY DESIGN Twenty-two mothers >24 weeks gestation presenting within 4 hours of diagnosis of clinical chorioamnionitis were randomized with their 24 infants to NAC or saline treatment. Antenatal NAC (100 mg/kg/dose) or saline was given intravenously every 6 hours until delivery. Postnatally, NAC (12.5-25 mg/kg/dose, n = 12) or saline (n = 12) was given every 12 hours for 5 doses. Doppler studies of fetal umbilical and fetal and infant cerebral blood flow, cranial ultrasounds, echocardiograms, cerebral oxygenation, electroencephalograms, and serum cytokines were evaluated before and after treatment, and 12, 24, and 48 hours after birth. Magnetic resonance spectroscopy and diffusion imaging were performed at term age equivalent. Development was followed for cerebral palsy or autism to 4 years of age. RESULTS Cardiovascular measures, cerebral blood flow velocity and vascular resistance, and cerebral oxygenation did not differ between treatment groups. Cerebrovascular coupling was disrupted in infants with chorioamnionitis treated with saline but preserved in infants treated with NAC, suggesting improved vascular regulation in the presence of neuroinflammation. Infants treated with NAC had higher serum anti-inflammatory interleukin-1 receptor antagonist and lower proinflammatory vascular endothelial growth factor over time vs controls. No adverse events related to NAC administration were noted. CONCLUSIONS In this cohort of newborns exposed to chorioamnionitis, antenatal and postnatal NAC was safe, preserved cerebrovascular regulation, and increased an anti-inflammatory neuroprotective protein. TRIAL REGISTRATION ClinicalTrials.gov: NCT00724594.
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Affiliation(s)
- Dorothea D. Jenkins
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | - Donald B. Wiest
- Department of Clinical Pharmacy and Outcome Science, Medical University of South Carolina, Charleston, SC
| | - Denise M. Mulvihill
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | - Anthony M. Hlavacek
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | | | - Truman R. Brown
- Department of Neuroscience’s Center for Advanced Imaging Research, Medical University of South Carolina, Charleston, SC
| | - Joseph J. Taylor
- Department of Neuroscience’s Center for Advanced Imaging Research, Medical University of South Carolina, Charleston, SC,Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC
| | - Jason R. Buckley
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | - Robert P. Turner
- Department of Clinical Pediatrics and Neurology, University of South Carolina School of Medicine and Palmetto Health Richland Children’s Hospital, Columbia, SC
| | | | - Jessica P. Bentzley
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | - Kathryn E. Hope
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | - Andrew B. Barbour
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | - Danielle W. Lowe
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC
| | - Renee H. Martin
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC
| | - Eugene Y. Chang
- Department of Obstetrics and Gynecology, Medical University of South Carolina, Charleston, SC
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Abstract
Oxidative stress has many implications in the pathogenesis of lung diseases. In this review, we provide an overview of Reactive Oxygen Species (ROS) and nitrogen (RNS) species and antioxidants, how they relate to normal physiological function and the pathophysiology of different lung diseases, and therapeutic strategies. The production of ROS/RNS from endogenous and exogenous sources is first discussed, followed by antioxidant systems that restore oxidative balance and cellular homeostasis. The contribution of oxidant/antioxidant imbalance in lung disease pathogenesis is also discussed. An overview of therapeutic strategies is provided, such as augmenting NO bioactivity, blocking the production of ROS/RNS and replacement of deficient antioxidants. The limitations of current strategies and failures of clinical trials are then addressed, followed by discussion of novel experimental approaches for the development of improved antioxidant therapies.
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Abstract
Contrast-induced nephropathy (CIN) is a serious complication of angiographic procedures resulting from the administration of contrast media (CM). It is the third most common cause of hospital acquired acute renal injury and represents about 12% of the cases. CIN is defined as an elevation of serum creatinine (Scr) of more than 25% or ≥0.5 mg/dl (44 μmol/l) from baseline within 48 h. More sensitive markers of renal injury are desired, therefore, several biomarkers of tubular injury are under evaluation. Multiple risk factors may contribute to the development of CIN; these factors are divided into patient- and procedure-related factors. Treatment of CIN is mainly supportive, consisting mainly of careful fluid and electrolyte management, although dialysis may be required in some cases. The available treatment option makes prevention the corner stone of management. This article will review the recent evidence concerning CIN incidence, diagnosis, and prevention strategies as well as its treatment and prognostic implications.
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Affiliation(s)
- Nazar M A Mohammed
- Department of Cardiology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Ahmed Mahfouz
- Department of Pharmacy, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Katafan Achkar
- Department of Nephrology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Ihsan M Rafie
- Department of Cardiology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Rachel Hajar
- Department of Cardiology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
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Whitmore LC, Goss KL, Newell EA, Hilkin BM, Hook JS, Moreland JG. NOX2 protects against progressive lung injury and multiple organ dysfunction syndrome. Am J Physiol Lung Cell Mol Physiol 2014; 307:L71-82. [PMID: 24793165 DOI: 10.1152/ajplung.00054.2014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Systemic inflammatory response syndrome (SIRS) is a common clinical condition in patients in intensive care units that can lead to complications, including multiple organ dysfunction syndrome (MODS). MODS carries a high mortality rate, and it is unclear why some patients resolve SIRS, whereas others develop MODS. Although oxidant stress has been implicated in the development of MODS, several recent studies have demonstrated a requirement for NADPH oxidase 2 (NOX2)-derived oxidants in limiting inflammation. We recently demonstrated that NOX2 protects against lung injury and mortality in a murine model of SIRS. In the present study, we investigated the role of NOX2-derived oxidants in the progression from SIRS to MODS. Using a murine model of sterile systemic inflammation, we observed significantly greater illness and subacute mortality in gp91(phox-/y) (NOX2-deficient) mice compared with wild-type mice. Cellular analysis revealed continued neutrophil recruitment to the peritoneum and lungs of the NOX2-deficient mice and altered activation states of both neutrophils and macrophages. Histological examination showed multiple organ pathology indicative of MODS in the NOX2-deficient mice, and several inflammatory cytokines were elevated in lungs of the NOX2-deficient mice. Overall, these data suggest that NOX2 function protects against the development of MODS and is required for normal resolution of systemic inflammation.
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Affiliation(s)
- Laura C Whitmore
- Department of Pediatrics, Inflammation Program, the University of Iowa, Iowa City, Iowa; and Interdisciplinary Graduate Program in Molecular and Cellular Biology, the University of Iowa, Iowa City, Iowa
| | - Kelli L Goss
- Department of Pediatrics, Inflammation Program, the University of Iowa, Iowa City, Iowa; and
| | - Elizabeth A Newell
- Department of Pediatrics, Inflammation Program, the University of Iowa, Iowa City, Iowa; and
| | - Brieanna M Hilkin
- Department of Pediatrics, Inflammation Program, the University of Iowa, Iowa City, Iowa; and
| | - Jessica S Hook
- Department of Pediatrics, Inflammation Program, the University of Iowa, Iowa City, Iowa; and
| | - Jessica G Moreland
- Department of Pediatrics, Inflammation Program, the University of Iowa, Iowa City, Iowa; and Interdisciplinary Graduate Program in Molecular and Cellular Biology, the University of Iowa, Iowa City, Iowa
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Chousterman BG, Bouadma L, Moutereau S, Loric S, Alvarez-Gonzalez A, Mekontso-Dessap A, Laissy JP, Rahmouni A, Katsahian S, Brochard L, Schortgen F. Prevention of contrast-induced nephropathy by N-acetylcysteine in critically ill patients: Different definitions, different results. J Crit Care 2013; 28:701-9. [DOI: 10.1016/j.jcrc.2013.03.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 03/11/2013] [Accepted: 03/13/2013] [Indexed: 11/24/2022]
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23
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Whitmore LC, Hilkin BM, Goss KL, Wahle EM, Colaizy TT, Boggiatto PM, Varga SM, Miller FJ, Moreland JG. NOX2 protects against prolonged inflammation, lung injury, and mortality following systemic insults. J Innate Immun 2013; 5:565-80. [PMID: 23635512 DOI: 10.1159/000347212] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 01/15/2013] [Indexed: 01/11/2023] Open
Abstract
The systemic inflammatory response syndrome (SIRS) is a clinical condition occurring in intensive care unit patients as a consequence of both infectious and noninfectious insults. The mechanisms underlying resolution of SIRS are not well characterized. NOX2 (NADPH oxidase 2)-derived reactive oxygen species are critical for killing of certain pathogens by polymorphonuclear leukocytes (PMN). Patients with chronic granulomatous disease who lack functional NOX2 are not only prone to serious infections, they also exhibit chronic inflammatory conditions, suggesting a local anti-inflammatory role for NOX2. We hypothesized that NOX2 is required for the resolution of sterile systemic inflammation. Using a murine model of sterile generalized inflammation, we observed dramatically increased mortality of gp91(phox-/y) (NOX2-deficient) as compared to wild-type (WT) mice. Both genotypes developed robust SIRS with hypothermia, hypotension, and leukopenia; however, WT mice recovered within 48 h whereas NOX2-deficient mice did not. Although both groups displayed rapid peritoneal PMN recruitment, the recruited NOX2-deficient PMN demonstrated an enhanced inflammatory phenotype. Moreover, NOX2-deficient mice exhibited a hemorrhagic inflammatory response in the lungs with rapid and persistent recruitment of neutrophils to the alveolar space, whereas WT mice had minimal lung pathology. Several proinflammatory cytokines remained elevated in NOX2-deficient mice. The persistent inflammatory environment observed in NOX2-deficient mice resulted from continued peritoneal chemokine secretion and not delayed apoptosis of PMN. These data suggest a requirement for NOX2 in the resolution of systemic inflammation.
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Affiliation(s)
- Laura C Whitmore
- Department of Pediatrics, The University of Iowa and Veterans Affairs Medical Center, Iowa City, Iowa, USA
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Fraga CM, Tomasi CD, Biff D, Topanotti MFL, Felisberto F, Vuolo F, Petronilho F, Dal-Pizzol F, Ritter C. The Effects of N-Acetylcysteine and Deferoxamine on Plasma Cytokine and Oxidative Damage Parameters in Critically Ill Patients With Prolonged Hypotension: A Randomized Controlled Trial. J Clin Pharmacol 2013; 52:1365-72. [DOI: 10.1177/0091270011418657] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Lameire N, Kellum JA. Contrast-induced acute kidney injury and renal support for acute kidney injury: a KDIGO summary (Part 2). CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2013; 17:205. [PMID: 23394215 PMCID: PMC4056805 DOI: 10.1186/cc11455] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Acute kidney injury (AKI) is a common and serious problem affecting millions and causing death and disability for many. In 2012, Kidney Disease: Improving Global Outcomes completed the first ever international multidisciplinary clinical practice guideline for AKI. The guideline is based on evidence review and appraisal, and covers AKI definition, risk assessment, evaluation, prevention, and treatment. Two topics, contrast-induced AKI and management of renal replacement therapy, deserve special attention because of the frequency in which they are encountered and the availability of evidence. Recommendations are based on systematic reviews of relevant trials. Appraisal of the quality of the evidence and the strength of recommendations followed the Grading of Recommendations Assessment, Development and Evaluation approach. Limitations of the evidence are discussed and a detailed rationale for each recommendation is provided. This review is an abridged version of the guideline and provides additional rationale and commentary for those recommendation statements that most directly impact the practice of critical care.
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Szakmany T, Hauser B, Radermacher P. N-acetylcysteine for sepsis and systemic inflammatory response in adults. Cochrane Database Syst Rev 2012; 2012:CD006616. [PMID: 22972094 PMCID: PMC6517277 DOI: 10.1002/14651858.cd006616.pub2] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Death is common in systemic inflammatory response syndrome (SIRS) or sepsis-induced multisystem organ failure and it has been thought that antioxidants such as N-acetylcysteine could be beneficial. OBJECTIVES We assessed the clinical effectiveness of intravenous N-acetylcysteine for the treatment of patients with SIRS or sepsis. SEARCH METHODS We searched the following databases: Cochrane Central Register of Clinical Trials (CENTRAL) (The Cochrane Library 2011, Issue 12); MEDLINE (January 1950 to January 2012); EMBASE (January 1980 to January 2012); CINAHL (1982 to January 2012); the NHS Trusts Clinical Trials Register and Current Controlled Trials (www.controlled-trials.com); LILACS; KoreaMED; MEDCARIB; INDMED; PANTELEIMON; Ingenta; ISI Web of Knowledge and the National Trials Register to identify all relevant randomized controlled trials available for review. SELECTION CRITERIA We included only randomized controlled trials (RCTs) in the meta-analysis. DATA COLLECTION AND ANALYSIS We independently performed study selection, quality assessment and data extraction. We estimated risk ratios (RR) for dichotomous outcomes. We measured statistical heterogeneity using the I(2) statistic. MAIN RESULTS We included 41 fully published studies (2768 patients). Mortality was similar in the N-acetylcysteine group and the placebo group (RR 1.06, 95% CI 0.79 to 1.42; I(2) = 0%). Neither did N-acetylcysteine show any significant effect on length of stay, duration of mechanical ventilation or incidence of new organ failure. Early application of N-acetylcysteine to prevent the development of an oxidato-inflammatory response did not affect the outcome, nor did late application that is after 24 hours of developing symptoms. Late application was associated with cardiovascular instability. AUTHORS' CONCLUSIONS Overall, this meta-analysis puts doubt on the safety and utility of intravenous N-acetylcysteine as an adjuvant therapy in SIRS and sepsis. At best, N-acetylcysteine is ineffective in reducing mortality and complications in this patient population. At worst, it can be harmful, especially when administered later than 24 hours after the onset of symptoms, by causing cardiovascular depression. Unless future RCTs provide evidence of treatment effect, clinicians should not routinely use intravenous N-acetylcysteine in SIRS or sepsis and academics should not promote its use.
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Affiliation(s)
- Tamas Szakmany
- Department of Anaesthesia, Cwm Taf NHS Trust, Royal Glamorgan Hospital, Llantrisant, UK.
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Wang G, Bainbridge D, Martin J, Cheng D. N-acetylcysteine in Cardiac Surgery: Do the Benefits Outweigh the Risks? A Meta-Analytic Reappraisal. J Cardiothorac Vasc Anesth 2011; 25:268-75. [DOI: 10.1053/j.jvca.2010.04.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2010] [Indexed: 02/05/2023]
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Joannidis M, Druml W, Forni LG, Groeneveld ABJ, Honore P, Oudemans-van Straaten HM, Ronco C, Schetz MRC, Woittiez AJ. Prevention of acute kidney injury and protection of renal function in the intensive care unit. Expert opinion of the Working Group for Nephrology, ESICM. Intensive Care Med 2010; 36:392-411. [PMID: 19921152 DOI: 10.1007/s00134-009-1678-y] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2008] [Accepted: 08/13/2009] [Indexed: 12/18/2022]
Abstract
BACKGROUND Acute renal failure on the intensive care unit is associated with significant mortality and morbidity. OBJECTIVES To determine recommendations for the prevention of acute kidney injury (AKI), focusing on the role of potential preventative maneuvers including volume expansion, diuretics, use of inotropes, vasopressors/vasodilators, hormonal interventions, nutrition, and extracorporeal techniques. METHOD A systematic search of the literature was performed for studies using these potential protective agents in adult patients at risk for acute renal failure/kidney injury between 1966 and 2009. The following clinical conditions were considered: major surgery, critical illness, sepsis, shock, and use of potentially nephrotoxic drugs and radiocontrast media. Where possible the following endpoints were extracted: creatinine clearance, glomerular filtration rate, increase in serum creatinine, urine output, and markers of tubular injury. Clinical endpoints included the need for renal replacement therapy, length of stay, and mortality. Studies are graded according to the international Grades of Recommendation, Assessment, Development, and Evaluation (GRADE) group system. CONCLUSIONS AND RECOMMENDATIONS Several measures are recommended, though none carries grade 1A. We recommend prompt resuscitation of the circulation with special attention to providing adequate hydration whilst avoiding high-molecular-weight hydroxy-ethyl starch (HES) preparations, maintaining adequate blood pressure using vasopressors in vasodilatory shock. We suggest specific vasodilators [corrected] under strict hemodynamic control, sodium bicarbonate for emergency procedures administering contrast media, and periprocedural hemofiltration in severe chronic renal insufficiency undergoing coronary intervention. ELECTRONIC SUPPLEMENTARY MATERIAL The online version of this article (doi:10.1007/s00134-009-1678-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Michael Joannidis
- Medical Intensive Care Unit, Department of Internal Medicine I, Medical University Innsbruck, Anichstasse 31, 6020 Innsbruck, Austria.
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Laisalmi-Kokki M, Pesonen E, Kokki H, Valta P, Pitkänen M, Teppo AM, Honkanen E, Lindgren L. Potentially detrimental effects of N-acetylcysteine on renal function in knee arthroplasty. Free Radic Res 2009; 43:691-6. [PMID: 19526394 DOI: 10.1080/10715760902998206] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Ischaemia/reperfusion induces systemic inflammation and oxidative stress and thereby remote organ injury in the kidney. In a double-blind, placebo-controlled clinical trial of 30 patients undergoing knee arthroplasty with tourniquet, this study evaluated the effect of N-acetylcysteine (NAC) infusion on renal function by measuring urine alpha-1-microglobulin, N-acetyl-beta-D-glucosaminidase (NAG), glutathione-S-transferase-alpha and -phi and serum creatinine and cystatin C concentrations up to 24 h post-operatively. Compared to the baseline, urine alpha-1-microglobulin/creatinine increased in both groups and was higher in the NAC group than in the placebo group at tourniquet deflation and at 3 h thereafter. Urine NAG/creatinine increased at deflation and at 3 h thereafter in the NAC group and the ratio was higher than in the placebo group. The two sensitive indicators of proximal tubular damage and function used in the present study suggest that use of NAC in clinical setting of ischaemia/reperfusion injury may increase the risk of remote kidney injury.
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Affiliation(s)
- Merja Laisalmi-Kokki
- Department of Anaesthesiology and Intensive Care, Kuopio University Hospital, Kuopio, Finland.
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Ho KM, Morgan DJR. Meta-analysis of N-acetylcysteine to prevent acute renal failure after major surgery. Am J Kidney Dis 2008; 53:33-40. [PMID: 18649982 DOI: 10.1053/j.ajkd.2008.05.019] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2008] [Accepted: 05/07/2008] [Indexed: 12/17/2022]
Abstract
BACKGROUND Acute renal failure after major surgery is associated with significant mortality and morbidity that theoretically may be attenuated by N-acetylcysteine. DESIGN Meta-analysis of relevant studies sourced from the Cochrane Controlled Trial Register (2007 issue 4), EMBASE, and MEDLINE databases (1966 to February 1, 2008) without language restriction. SETTING & POPULATION Adult patients undergoing major surgery without the use of radiocontrast. SELECTION CRITERIA FOR STUDIES Randomized controlled studies comparing N-acetylcysteine with a placebo perioperatively. DATA ANALYSIS Categorical variables are reported as odds ratio (OR) with 95% confidence interval (CI), and continuous variables are reported as weighted-mean-difference (WMD) with 95% CI. OUTCOME MEASURES Effects of N-acetylcysteine on mortality and acute renal failure requiring dialysis were the main outcomes of interest. Additional outcome measures included an incremental increase in serum creatinine concentration greater than 25% above baseline, surgical reexploration for bleeding, amount of allogeneic blood transfusion, and length of intensive care unit stay. RESULTS 10 studies involving a total of 1,193 adult patients undergoing major surgery were considered. N-Acetylcysteine use was not associated with a decrease in mortality (OR, 1.05; 95% CI, 0.58 to 1.92), acute renal failure requiring dialysis (OR, 1.04; 95% CI, 0.45 to 2.37), incremental increase in serum creatinine concentration greater than 25% above baseline (OR, 0.84; 95% CI, 0.64 to 1.11), or length of intensive care unit stay (WMD in days, 0.46; 95% CI, -0.43 to 1.36). N-acetylcysteine did not appear to increase the risk of surgical reexploration for bleeding (OR, 1.16; 95% CI, 0.57 to 2.38) or amount of allogeneic blood transfusion required (WMD in units, 0.31; 95% CI, -0.21 to 0.84). LIMITATIONS Most studied patients had cardiac surgery and normal renal function preoperatively. CONCLUSIONS There is no current evidence that N-acetylcysteine used perioperatively can alter mortality or renal outcomes when radiocontrast is not used.
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Affiliation(s)
- Kwok M Ho
- Intensive Care Unit, Royal Perth Hospital, Perth, WA 6000, Australia.
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Spapen H. Liver perfusion in sepsis, septic shock, and multiorgan failure. Anat Rec (Hoboken) 2008; 291:714-20. [PMID: 18484618 DOI: 10.1002/ar.20646] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Sepsis causes significant alterations in the hepatic macro- and microcirculation. Diverging views exist on global hepatic blood flow during experimental sepsis because of the large variety in animal and sepsis models. Fluid-resuscitated clinical sepsis is characterized by ongoing liver ischemia due to a defective oxygen extraction despite enhanced perfusion. The effects of vasoactive agents on the hepatosplanchnic circulation are variable, mostly anecdotal, and depend on baseline perfusion, time of drug administration, and use of concomitant medication. Microvascular blood flow disturbances are thought to play a pivotal role in the development of sepsis-induced multiorgan failure. Redistribution of intrahepatic blood flow in concert with a complex interplay between sinusoidal endothelial cells, liver macrophages, and passing leukocytes lead to a decreased perfusion and blood flow velocity in the liver sinusoids. Activation and dysfunction of the endothelial cell barrier with subsequent invasion of neutrophils and formation of microthrombi further enhance liver tissue ischemia and damage. Substances that regulate (micro)vascular tone, such as nitric oxide, endothelin-1, and carbon monoxide, are highly active during sepsis. Possible interactions between these mediators are not well understood, and their therapeutic manipulation produces equivocal or disappointing results. Whether and how standard resuscitation therapy influences the hepatic microvascular response to sepsis is unknown. Indirect evidence supports the concept that improving the microcirculation may prevent or ameliorate sepsis-induced organ failure.
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Affiliation(s)
- Herbert Spapen
- Intensive Care Department, University Hospital, Vrije Universiteit Brussels, Brussels, Belgium.
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Sevransky JE, Nour S, Susla GM, Needham DM, Hollenberg S, Pronovost P. Hemodynamic goals in randomized clinical trials in patients with sepsis: a systematic review of the literature. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2008; 11:R67. [PMID: 17584921 PMCID: PMC2206433 DOI: 10.1186/cc5948] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2007] [Revised: 05/01/2007] [Accepted: 06/20/2007] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Patients with sepsis suffer high morbidity and mortality. We sought to conduct a systematic review of the literature to evaluate the association between hemodynamic goals of therapy and patient outcomes. METHODS We conducted a comprehensive search of the literature to systematically review hemodynamic goals used in clinical trials in patients with sepsis. We searched the literature using the Pubmed (1965-June 2006), Embase (1974-June 2006), CINAHL (1982-June 2006), pre-CINAHL, and Cochrane Library (2006, issue 3) electronic databases on 1 August 2006 for the following terms: sepsis, septic shock, severe sepsis, human clinical trials. We also hand-searched references and our personal files. Studies were selected if they met all of the following criteria: randomized, controlled trial study design; enrollment of adult patients with sepsis; presence of a hemodynamic goal for patient management; > 24-hour follow-up; and survival included as an outcome. Studies were independently selected and reviewed by two investigators. RESULTS A total of 6,006 citations were retrieved, and 13 eligible articles were reviewed. Mean arterial pressure was a treatment goal in nine studies, and systolic blood pressure was a treatment goal in three studies. A goal for pulmonary artery occlusion pressure, central venous pressure, and cardiac index was given in four, three, and five studies, respectively. The range of hemodynamic goals used in the trials were: mean arterial pressure 60-100 mmHg, central venous pressure 6-13 mmHg, pulmonary artery occlusion pressure 13-17 mmHg, and cardiac index 3-6 l/min/m2. All trials that used a systolic blood pressure goal used 90 mmHg as the aim. CONCLUSION For those trials that specify hemodynamic goals, the wide range of treatment targets suggest a lack of agreement on blood pressure and filling pressure goals for management of patients with sepsis. There was also inconsistency between trials in which measures were targeted. Further research is necessary to determine whether this lack of consistency in hemodynamic goals may contribute to heterogeneity in treatment effects for clinical trials of novel sepsis therapies.
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Affiliation(s)
- Jonathan E Sevransky
- Department of Pulmonary/Critical Care Medicine, Johns Hopkins University, 5501 Hopkins Bayview Circle, Baltimore, MD 21224, USA
| | - Seema Nour
- Division of Cardiology, University of Wisconsin, 600 Highland Avenue H6349, Madison, WI 53792, USA
| | - Gregory M Susla
- MedImmune Corporation, One MedImmune Way, Gaithersburg, MD 20878, USA
| | - Dale M Needham
- Department of Pulmonary/Critical Care Medicine, Johns Hopkins University, 5501 Hopkins Bayview Circle, Baltimore, MD 21224, USA
| | - Steven Hollenberg
- Division of Cardiovascular Diseases, Cooper University Hospital, Camden, NJ, 08103 USA
| | - Peter Pronovost
- Department of Anesthesiology/Critical Care Medicine, Johns Hopkins University, 600 North Wolfe Street, Baltimore, MD 21287, USA
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Schaller G, Pleiner J, Mittermayer F, Posch M, Kapiotis S, Wolzt M. Effects of N-acetylcysteine against systemic and renal hemodynamic effects of endotoxin in healthy humans. Crit Care Med 2007; 35:1869-75. [PMID: 17568325 DOI: 10.1097/01.ccm.0000275385.45557.25] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Systemic inflammation causes vasodilation and impairs the vascular response to catecholamines. There is evidence that altered vasoreactivity is associated with increased production of free radicals. We studied the influence of systemic doses of the antioxidant N-acetylcysteine on inflammatory cytokines and renal plasma flow and on the systemic pressor response to norepinephrine during experimental endotoxemia. DESIGN A double-blind, placebo-controlled crossover study. SETTING Medical University of Vienna, Clinical Pharmacology, Vienna General Hospital, AKH. SUBJECTS Eight healthy, male humans. INTERVENTIONS Intravenous administration of Escherichia coli endotoxin (lipopolysaccharide, 20 IU/kg) on two separate study days with concomitant intravenous infusion of placebo or N-acetylcysteine (150 mg/kg loading dose; 15 mg/kg/hr continuous infusion), respectively. MEASUREMENTS AND MAIN RESULTS Measurements of inflammatory cytokines, of renal plasma flow by the para-aminohippurate-clearance method, and of the systemic pressor response to norepinephrine were taken at baseline and after endotoxin. Lipopolysaccharide increased body temperature and plasma concentrations of tumor necrosis factor-alpha, which was mitigated during N-acetylcysteine infusions. Likewise, the lipopolysaccharide-induced increases in renal plasma flow and decreases in blood pressure were attenuated, and the hyporeactivity of pulse rate to norepinephrine 4 hrs after lipopolysaccharide was improved by N-acetylcysteine. CONCLUSION High doses of N-acetylcysteine might exert protective effects on systemic hemodynamics and on the reactivity to catecholamines in humans challenged by lipopolysaccharide. This action of the antioxidant N-acetylcysteine is paralleled by humoral anti-inflammatory mechanisms and may be useful in patients with systemic inflammation.
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Affiliation(s)
- Georg Schaller
- Department of Clinical Pharmacology, Medical University of Vienna, Austria
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Szakmany T, Hauser B, Matejovic M, Radermacher P. N-acetylcysteine for sepsis and systemic inflammatory response in adults. Cochrane Database Syst Rev 2007. [DOI: 10.1002/14651858.cd006616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Crimi E, Sica V, Williams-Ignarro S, Zhang H, Slutsky AS, Ignarro LJ, Napoli C. The role of oxidative stress in adult critical care. Free Radic Biol Med 2006; 40:398-406. [PMID: 16443154 DOI: 10.1016/j.freeradbiomed.2005.10.054] [Citation(s) in RCA: 145] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2005] [Revised: 10/16/2005] [Accepted: 10/22/2005] [Indexed: 11/23/2022]
Abstract
Oxidative stress defines an imbalance in production of oxidizing chemical species and their effective removal by protective antioxidants and scavenger enzymes. Evidence of massive oxidative stress is well established in adult critical illnesses characterized by tissue ischemia-reperfusion injury and by an intense systemic inflammatory response such as during sepsis and acute respiratory distress syndrome. Oxidative stress could exacerbate organ injury and thus overall clinical outcome. We searched MEDLINE databases (January 1966 to June 2005). For interventional studies, we accepted only randomized trials. Several small clinical trials have been performed in order to reduce oxidative stress by supplementation of antioxidants alone or in combination with standard therapies. These studies have reported controversial results. Newer large multicenter trials with antioxidant supplementation should be performed, considering administration at an early stage of illness and a wider population of critically ill patients.
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Affiliation(s)
- Ettore Crimi
- Department of Anesthesiology and Critical Care Medicine, University of Eastern Piedmont, 28100 Novara, Italy.
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Abstract
Sepsis syndrome, a systemic response to infection, can beget devastating outcomes even in previously normal individuals. Recent research in septic patients has led to the discovery that early goal-directed resuscitation guided by continuous monitoring of mixed venous hemoglobin saturation, along with moderate doses of corticosteroids, can reduce mortality. An improved understanding of the complex interaction between the inflammatory and coagulant systems in sepsis pathophysiology has resulted in novel treatments, such as recombinant human activated protein C, which improves survival in patients with severe sepsis and a high risk of death. However, despite an increased understanding of the complex pathophysiology of this syndrome and the discovery of new, effective treatments, severe sepsis still results in significant morbidity and mortality. Consequently, investigations continue into additional therapeutic agents directed against novel targets. Following a review of recent advances in sepsis treatment, we briefly discuss a few of the new, promising therapeutic strategies currently being investigated.
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Affiliation(s)
- Todd W Rice
- Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University School of Medicine, Center for Lung Research, Nashville, Tennessee 37232-2650, USA.
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Arrieta O, Rodriguez-Reyna TS, Sotelo J. Pharmacological treatment of septic shock. Expert Opin Ther Pat 2005. [DOI: 10.1517/13543776.10.5.601] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Spapen H. N-acetylcysteine in clinical sepsis: a difficult marriage. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2004; 8:229-30. [PMID: 15312203 PMCID: PMC522849 DOI: 10.1186/cc2887] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The high morbidity and mortality of severe sepsis and septic shock fosters a continuous search for novel therapies that go beyond pure correction of oxygenation and hemodynamics. Within this scope, N-acetylcysteine shows great promise. Beside proven anti-oxidant, anti-inflammatory and cytoprotective effects, N-acetylcysteine does also ensure endothelial protection and enhances microvascular blood flow. Studies that put these highly favourable properties to the clinical test remain scarce but are definitely needed to determine whether N-acetylcysteine has a place in our therapeutic armamentarium against sepsis.
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Affiliation(s)
- Herbert Spapen
- Intensive Care Department, Academic Hospital, Vrije Universiteit Brussels, Belgium.
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Asfar P, De Backer D, Meier-Hellmann A, Radermacher P, Sakka SG. Clinical review: influence of vasoactive and other therapies on intestinal and hepatic circulations in patients with septic shock. Crit Care 2004; 8:170-9. [PMID: 15153235 PMCID: PMC468887 DOI: 10.1186/cc2418] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The organs of the hepatosplanchnic system are considered to play a key role in the development of multiorgan failure during septic shock. Impaired oxygenation of the intestinal mucosa can lead to disruption of the intestinal barrier, which may promote a vicious cycle of inflammatory response, increased oxygen demand and inadequate oxygen supply. Standard septic shock therapy includes supportive treatment such as fluid resuscitation, administration of vasopressors (adrenergic and nonadrenergic drugs), and respiratory and renal support. These therapies may have beneficial or detrimental effects not only on systemic haemodynamics but also on splanchnic haemodynamics, at both the macrocirculatory and microcirculatory levels. This clinical review focuses on the splanchnic haemodynamic and metabolic effects of standard therapies used in patients with septic shock, as well as on the recently described nonconventional therapies such as vasopressin, prostacyclin and N-acetyl cysteine.
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Affiliation(s)
- Pierre Asfar
- Staff Physician, Département de Réanimation Médicale, Centre Hospitalier Universitaire, Angers, France
| | - Daniel De Backer
- Staff Physician, Département de Réanimation Médicale, Hôpital Erasme, Université Libre, Bruxelles, Belgium
| | - Andreas Meier-Hellmann
- Head, Klinik für Anästhesie, Intensivmedizin und Schmerztherapie, Helios Klinikum, Erfurt, Germany
| | - Peter Radermacher
- Section Head, Sektion Anästhesiologische Pathophysiologie und Verfahrensentwicklung, Universitätsklinikum, Ulm, Germany
| | - Samir G Sakka
- Staff Physician, Department of Anesthesiology and Intensive Care Medicine, Friedrich-Schiller University, Jena, Germany
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Emet S, Memiş D, Pamukçu Z. The influence of N-acetyl-L-cystein infusion on cytokine levels and gastric intramucosal pH during severe sepsis. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2004; 8:R172-9. [PMID: 15312215 PMCID: PMC522835 DOI: 10.1186/cc2866] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2003] [Revised: 02/27/2004] [Accepted: 04/20/2004] [Indexed: 01/28/2023]
Abstract
Introduction The purpose of the present study was to evaluate the effects of continuously infused N-acetyl-L-cystein (NAC) on serum cytokine levels and gastric intramucosal pH in humans suffering from severe sepsis. Methods Fifty-three patients were included in the study. In the NAC group (n = 27), after an initial intravenous bolus of NAC (150 mg/kg over 5 min), a continuous intravenous infusion of 12.5 mg/kg per hour was given for 6 hours. Patients in the control group (n = 26) were administered dextrose (5% solution) at the same dosage. We recorded the following: haemodynamic parameters, nasopharyngeal temperature, arterial blood gas changes, plasma cytokine levels, biochemical parameters, intramucosal pH, length of stay in the intensive care unit, duration of of mechanical ventilation and mortality. All measurements were taken at baseline (15 min before the start of the study) and were repeated immediately after the bolus infusion, and at 24 and 48 hours after initiation of the continuous NAC infusion. Results No differences were found between groups in levels of the major cytokines, duration of ventilation and intensive care unit stay, gastric intramucosal pH and arterial oxygen tension/inspired fractional oxygen ratio (P > 0.05). Conclusion We found that NAC infusion at the doses given did not affect cytokine levels, outcomes, or gastric intramucosal pH in patients with severe sepsis. Because of the limited number of patients included in the study and the short period of observation, our findings need confirmation in larger clinical trials of NAC infused in a dose-titrated manner. However, our results do not support the use of NAC in patients with severe sepsis.
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Affiliation(s)
- Sayım Emet
- Department of Anaesthesiology and Reanimation, Medical Faculty, Trakya University, Edirne, Turkey
| | - Dilek Memiş
- Associate Professor, Department of Anaesthesiology and Reanimation, Medical Faculty, Trakya University, Edirne, Turkey
| | - Zafer Pamukçu
- Professor, Chair of Department of Anaesthesiology and Reanimation, Medical Faculty, Trakya University, Edirne, Turkey
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Vassilev D, Hauser B, Bracht H, Iványi Z, Schoaff M, Asfar P, Vogt J, Wachter U, Schelzig H, Georgieff M, Brückner UB, Radermacher P, Fröba G. Systemic, pulmonary, and hepatosplanchnic effects of N-acetylcysteine during long-term porcine endotoxemia. Crit Care Med 2004; 32:525-32. [PMID: 14758174 DOI: 10.1097/01.ccm.0000110679.52670.c4] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Controversial data have been reported on the effects of N-acetylcysteine in patients with septic shock. We therefore investigated the systemic, pulmonary, and hepatosplanchnic hemodynamic, gas exchange, and metabolic effects of N-acetylcysteine during long-term, volume-resuscitated, hyperdynamic porcine endotoxemia, which mimics the features of hyperdynamic human sepsis. DESIGN Prospective, randomized, controlled experimental study. SETTING Investigational animal laboratory. SUBJECTS Eighteen pigs were randomized to receive endotoxin alone (controls, n = 9) or endotoxin plus N-acetylcysteine (n = 9). INTERVENTIONS Anesthetized, mechanically ventilated, and instrumented animals received continuous intravenous endotoxin and were resuscitated with hydroxyethylstarch to keep mean arterial pressure >60 mm Hg. After 12 hrs of endotoxemia, they were randomized to receive either placebo or N-acetylcysteine (150 mg/kg loading dose over 1 hr followed by 20 mg.kg-1.hr-1 for 11 hrs). MEASUREMENTS AND MAIN RESULTS Before as well as 12, 18, and 24 hrs after starting the endotoxin infusion, systemic, pulmonary, and hepatosplanchnic hemodynamics, oxygen exchange, and metabolism as well as nitric oxide, glutathione, and 8-isoprostane concentrations were assessed. N-acetylcysteine failed to improve any of the variables of the systemic, pulmonary, or hepatosplanchnic hemodynamics, gas exchange, and metabolism. Although N-acetylcysteine significantly elevated glutathione concentration, it did not influence the 8-isoprostane concentrations and even further reduced hepatic venous pH. CONCLUSIONS Despite the increased glutathione concentration, N-acetylcysteine did not improve systemic, pulmonary, and hepatosplanchnic hemodynamics, oxygen exchange, and metabolism. When compared with previous reports in the literature, a different timing of N-acetylcysteine administration and/or an ongoing or even N-acetylcysteine-induced aggravation of oxidative stress may account for this result.
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Affiliation(s)
- Damian Vassilev
- Sektion Anästhesiologische Pathophysiologie und Verfahrensentwicklung, Universitätsklinikum, Ulm, Germany
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Victor VM, Rocha M, De la Fuente M. Immune cells: free radicals and antioxidants in sepsis. Int Immunopharmacol 2004; 4:327-47. [PMID: 15037211 DOI: 10.1016/j.intimp.2004.01.020] [Citation(s) in RCA: 184] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2003] [Revised: 01/13/2004] [Accepted: 01/29/2004] [Indexed: 02/07/2023]
Abstract
The excessive production of reactive oxygen species (ROS), associated with inflammation, leads to a condition of oxidative stress. Oxidative stress is a major contributing factor to the high mortality rates associated with several diseases such as endotoxic shock. This condition can be controlled to a certain degree by antioxidant therapies. Immune cells use ROS in order to support their functions and therefore need adequate levels of antioxidant defenses in order to avoid the harmful effect of an excessive production of ROS. This review discusses the toxic effects of endotoxin, paying particular attention to immune function. It continues by analyzing the mechanism to which specific cells of the immune system recognize endotoxin, and the resulting pathways leading to nuclear factor-kappaB activation and proinflammatory gene transcription. We also focus on the involvement of reactive oxygen and nitric oxide (NO) and the protective role of antioxidants. The potential clinical use of antioxidants in the treatment of sepsis and the effects on the redox state of the immune cells are discussed.
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Affiliation(s)
- Victor M Victor
- Unidad Mixta Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III-Universidad de Valencia, Avda. Blasco Ibañez 15, 46010 Valencia, Spain
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Molnar Z, Szakmany T, Koszegi T. Prophylactic N-acetylcysteine decreases serum CRP but not PCT levels and microalbuminuria following major abdominal surgery. A prospective, randomised, double-blinded, placebo-controlled clinical trial. Intensive Care Med 2003; 29:749-55. [PMID: 12682719 DOI: 10.1007/s00134-003-1723-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2002] [Accepted: 02/18/2003] [Indexed: 10/22/2022]
Abstract
OBJECTIVE Our objective was to investigate whether short-term infusion of the oxygen free radical scavenger N-acetylcysteine (NAC) administered before and during extensive abdominal surgery could ameliorate the progression of early systemic inflammatory response. DESIGN Prospective, randomised, double-blinded, placebo-controlled clinical trial. SETTING Twenty-bed intensive care unit in a university hospital. PATIENTS Following written informed consent, 100 patients were randomised into NAC and placebo groups. Three patients from the NAC group and four from the placebo group withdrew before the final analysis. INTERVENTION The treatment group (n=47) received NAC (150 mg/kg(-1) bolus followed by a continuous infusion of 12 mg/kg(-1)/h(-1)) and the placebo group ( n=46) received the same volume of 5% dextrose during surgery. MEASUREMENTS AND RESULTS Serum procalcitonin (PCT), C-reactive protein (CRP) and microalbuminuria was monitored preoperatively, on admission to ICU, then daily during the first 3 postoperative days. For statistical analysis Mann Whitney and Chi-squared tests were used. Patients' clinical course was similar in each group as monitored by the Multiple Organ Dysfunction Scores. There was no significant difference between the two groups regarding PCT and microalbuminuria at any assessment point. Significantly lower CRP levels were found in the NAC group on days 1 and 2 (t(24): median: 84.5 interquartile range: [62-120] vs. 118 [86-137] mg/l; p=0.020; t(48): 136 [103-232] vs. 195 [154-252] mg/l; p=0.013, NAC vs. placebo respectively). CONCLUSION In this study, short-term NAC treatment decreased CRP levels, but failed to attenuate any other inflammatory response, as monitored by serum PCT and microalbuminuria. Overall, our results do not support the routine prophylactic use of NAC as a free radical scavenger in abdominal surgery.
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Affiliation(s)
- Zsolt Molnar
- Department of Anaesthesiology and Intensive Care, University of Pécs, Pécs, Hungary.
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Abstract
Sepsis leads to an overwhelming inflammatory response of the host and is usually accompanied by well-known clinical symptoms (fever, tachycardia, leukocytosis, and so on) and the accompanying systemic inflammatory response syndrome (SIRS). Accordingly, most efforts to develop treatment strategies for sepsis have focused on those designed to counteract overactivation of the inflammatory system. Despite intensive research into identifying targets in sepsis, most of the resulting clinical trials have been based on experimental data and have resulted in no beneficial effects (i.e., survival). Recombinant activated protein C (APC) represents the first treatment that has led to restricted approval for use in sepsis in the USA and worldwide. This article reviews approaches to anti-inflammatory treatment in sepsis and provides an outlook into ongoing clinical trials as well as new treatments that have not yet been evaluated in the clinical setting.
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Affiliation(s)
- Niels C Riedemann
- Department of Pathology, University of Michigan Medical School, 1301 Catherine Road, Ann Arbor, MI 48109-0602, USA
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