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oxidative stress in critically ill patients

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https://www.readbyqxmd.com/read/28286784/the-influence-of-metabolic-imbalances-and-oxidative-stress-on-the-outcome-of-critically-ill-polytrauma-patients-a-review
#1
REVIEW
Alexandru Florin Rogobete, Dorel Sandesc, Marius Papurica, Emil Robert Stoicescu, Sonia Elena Popovici, Lavinia Melania Bratu, Corina Vernic, Adriana Mariana Sas, Adrian Tudor Stan, Ovidiu Horea Bedreag
The critically ill polytrauma patient presents with a series of associated pathophysiologies secondary to the traumatic injuries. The most important include systemic inflammatory response syndrome (SIRS), sepsis, oxidative stress (OS), metabolic disorders, and finally multiple organ dysfunction syndrome (MODS) and death. The poor outcome of these patients is related to the association of the aforementioned pathologies. The nutrition of the critically ill polytrauma patient is a distinct challenge because of the rapid changes in terms of energetic needs associated with hypermetabolism, sepsis, SIRS, and OS...
2017: Burns and trauma
https://www.readbyqxmd.com/read/28238004/effects-of-therapeutic-hypothermia-for-neuroprotection-from-the-viewpoint-of-redox-regulation
#2
REVIEW
Nobuyuki Nosaka, Ayumi Okada, Hirokazu Tsukahara
Redox regulation has recently been recognized as an important factor in acute illnesses as well as in chronic diseases. It has also become a target for neuroprotection in acute intensive care. Despite its well-known therapeutic effects, therapeutic hypothermia has recently been re-evaluated for its potential use in emergency and critical care medicine. Hypothermia is an undesirable physiological condition that can increase oxidative stress and decrease anti-oxidative potency. However, many studies have shown that under ischemia/reperfusion conditions, therapeutic hypothermia actually suppresses enhanced oxidative stress and maintains or increases anti-oxidative potency...
February 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28164593/modulation-of-the-redox-expression-and-inflammation-response-in-the-critically-ill-polytrauma-patient-with-thoracic-injury-statistical-correlations-between-antioxidant-therapy
#3
Ovidiu H Bedreag, Alexandru F Rogobete, Dorel Sandesc, Carmen A Cradigati, Mirela Sarandan, Sonia E Popovici, Raluca Dumache, Florin G Horhat, Corina Vernic, Laurentiu V Sima, Loredana Luca, Marius Papurica
BACKGROUND: One of the major causes of mortality in the world is represented by multiple traumas. Thoracic trauma is commonly associated with polytraumas. A series of physiopathological complications follow polytraumas, leading to a significant decrease in the survival rate. As a result of injuries, significant quantities of free radicals (FR) are produced, responsible for oxidative stress (OS). To minimize the effects of OS, we recommend the administration of antioxidant substances. In this study we want to highlight statistically significant correlations between antioxidant therapy and a series of clinical variables...
September 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164582/the-use-of-lipid-peroxidation-expression-as-a-biomarker-for-the-molecular-damage-in-the-critically-ill-polytrauma-patient
#4
REVIEW
Florin G Horhat, Alexandru F Rogobete, Marius Papurica, Dorel Sandesc, Sonia Tanasescu, Victor Dumitrascu, Monica Licker, Razvan Nitu, Carmen A Cradigati, Mirela Sarandan, Ovidiu Boruga, Ciprian D Crisan, Emil Ungureanu, Daniela M Popa, Sonia E Popovici, Ovidiu H Bedreag
BACKGROUND: The critically ill polytrauma patient, apart from the primary, traumatic injuries and the secondary, port-traumatic injuries, presents with a series of molecular disasters. Dysfunctions of the biochemical pathways and molecular damage add to the worsening of the clinical status of these patients, one of the most well-known molecular phenomena being oxidative stress (OS), responsible for an escalation of the inflammatory status, multiple infections, and multiple organ dysfunction syndrome (MODS)...
September 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164521/using-the-expression-of-damage-associated-molecular-pattern-damp-for-the-evaluation-and-monitoring-of-the-critically-ill-polytrauma-patient
#5
REVIEW
Marius Papurica, Alexandru F Rogobete, Dorel Sandesc, Carmen A Cradigati, Mirela Sarandan, Raluca Dumache, Florin G Horhat, Lavinia M Bratu, Razvan Nitu, Dan C Crisan, Delia I Horhat, Elena S Popovici, Sonia Tanasescu, Vlad Daliborca, Ovidiu Boruga, Ovidiu H Bedreag
BACKGROUND: The critically ill polytrauma patient continues to be one of the most complex cases in the intensive care unit (ICU). The molecular damage is closely connected with the severe, specific pathophysiological imbalances, such as severe inflammation, infections, hypermetabolism, oxidative stress, and ultimately multiple organ dysfunction syndrome (MODS). METHODS: The literature available on PubMed and Scopus was analysed for this study. The key words used in the search were "biomarkers in critically ill patients", "molecular damage", "sepsis biomarkers", "miRNAs biomarkers", and "oxidative stress"...
October 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28139396/heme-oxygenase-1-as-a-therapeutic-target-in-acute-kidney-injury
#6
Subhashini Bolisetty, Abolfazl Zarjou, Anupam Agarwal
A common clinical condition, acute kidney injury (AKI) significantly influences morbidity and mortality, particularly in critically ill patients. The pathophysiology of AKI is complex and involves multiple pathways, including inflammation, autophagy, cell-cycle progression, and oxidative stress. Recent evidence suggests that a single insult to the kidney significantly enhances the propensity to develop chronic kidney disease. Therefore, the generation of effective therapies against AKI is timely. In this context, the cytoprotective effects of heme oxygenase 1 (HO-1) in animal models of AKI are well documented...
January 27, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28129265/parenteral-and-enteral-nutrition-in-surgical-critical-care-plasma-metabolomics-demonstrates-divergent-effects-on-nitrogen-fatty-acid-ribonucleotide-and-oxidative-metabolism
#7
Brodie A Parent, Max Seaton, Danijel Djukovic, Haiwei Gu, Brittany Wheelock, Sandi L Navarro, Daniel Raftery, Grant E O'Keefe
BACKGROUND: Artificial nutrition support is central to the care of critically ill patients and is primarily provided enterally (EN). There are circumstances when parenteral nutrition (PN) is considered necessary. We are uncertain how each of these approaches confer clinical benefits beyond simply providing calories. We sought to better understand how each of these techniques influence metabolism in critically ill patients using a broad-based metabolomics approach. Metabolic responses to EN and PN may differ in ways that could help us understand how to optimize use of these therapies...
April 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28112061/inflammation-and-depression-a-causal-or-coincidental-link-to-the-pathophysiology
#8
Brian E Leonard
This review summarises the evidence that chronic low grade inflammation triggers changes that contribute to the mental and physical ill health of patients with major depression. Inflammation, and the activation of the hypothalamic pituitary axis by stress, are normal components of the stress response but when stress is prolonged and the endocrine and immune system become chronic resulting in the activation of the peripheral macrophages, the central microglia and hypercortisolemia, the neuronal networks are damaged and become dysfunctional...
January 23, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/28093238/a-model-of-the-mitochondrial-basis-of-bipolar-disorder
#9
REVIEW
Gerwyn Morris, Ken Walder, Sean L McGee, Olivia M Dean, Susannah J Tye, Michael Maes, Michael Berk
BACKGROUND: Bipolar disorder phenomenologically is a biphasic disorder of energy availability; increased in mania and decreased in depression. In consort, there is accumulating evidence indicating increased mitochondrial respiration and ATP production in bipolar mania which contrasts with decreased mitochondrial function in patients in the euthymic or depressive phase of the illness. Consequently, the central thesis of this paper is that bipolar disorder is due to a phasic dysregulation of mitochondrial biogenergetics...
January 14, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28088628/methods-needed-to-measure-predictive-accuracy-a-study-of-diabetic-patients
#10
Hafiz M R Khan, Sarah Mende, Aamrin Rafiq, Kemesha Gabbidon, P Hemachandra Reddy
Diabetes is one of the leading causes of morbidity and mortality and it can result in several complications such as kidney failure, heart failure, stroke, and blindness making it a major medical and public health concern in the United States. Statistical methods are important to detect risk factors and identify the best sampling plan to determine predictive bounds for diabetic patients' data. The main objective of this paper is to identify the best fit bootstrapping sampling method and to draw the predictive bound considering diabetes patient data...
January 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28068288/monitoring-of-breath-vocs-and-electrical-impedance-tomography-under-pulmonary-recruitment-in-mechanically-ventilated-patients
#11
Beate Brock, Svend Kamysek, Josephine Silz, Phillip Trefz, Jochen K Schubert, Wolfram Miekisch
Analysis of exhaled VOCs can provide information on physiology, metabolic processes, oxidative stress and lung diseases. In critically ill patients, VOC analysis may be used to gain complimentary information beyond global clinical parameters. This seems especially attractive in mechanically ventilated patients frequently suffering from impairment of gas exchange. This study was intended to assess (a) the effects of recruitment maneuvers onto VOC profiles, (b) the correlations between electrical impedance tomography (EIT) data and VOC profiles and (c) the effects of recruitment onto distribution of ventilation...
January 9, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28039838/fibroblast-growth-factor-21-and-its-novel-association-with-oxidative-stress
#12
REVIEW
Miguel Ángel Gómez-Sámano, Mariana Grajales-Gómez, Julia María Zuarth-Vázquez, Ma Fernanda Navarro-Flores, Mayela Martínez-Saavedra, Óscar Alfredo Juárez-León, Mariana G Morales-García, Víctor Manuel Enríquez-Estrada, Francisco J Gómez-Pérez, Daniel Cuevas-Ramos
Fibroblast growth factor 21 (FGF21) is an endocrine-member of the FGF family. It is synthesized mainly in the liver, but it is also expressed in adipose tissue, skeletal muscle, and many other organs. It has a key role in glucose and lipid metabolism, as well as in energy balance. FGF21 concentration in plasma is increased in patients with obesity, insulin resistance, and metabolic syndrome. Recent findings suggest that such increment protects tissue from an increased oxidative stress environment. Different types of physical stress, such as strenuous exercising, lactation, diabetic nephropathy, cardiovascular disease, and critical illnesses, also increase FGF21 circulating concentration...
April 2017: Redox Biology
https://www.readbyqxmd.com/read/28034666/oxidative-stress-in-sepsis-pathophysiological-implications-justifying-antioxidant-co-therapy
#13
REVIEW
Carlos André Prauchner
Sepsis is one of the main causes of death among critically ill patients. Sepsis pathogenesis includes infection by gram-negative and gram-positive bacteria, fungi, or both; exacerbated inflammatory response; hypotension, with potential to cause vasodilatory shock; and lesser delivery of oxygen to tissues due to impairment of oxygen utilization by cells. The participation of reactive species and/or free radicals such as nitric oxide (NO), peroxynitrite (ONOO(-)), superoxide (O2(-)), hydrogen peroxide (H2O2), and hydroxyl radical (OH) has been reported to underlie these effects...
December 26, 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/27922495/toxic-and-endocrine-myopathies
#14
Hans D Katzberg, Charles D Kassardjian
PURPOSE OF REVIEW: This article discusses the clinical features, pathophysiology, and management of toxic and endocrine myopathies. RECENT FINDINGS: Early detection and expeditious correction of metabolic disturbances in endocrinopathies such as Cushing syndrome, thyroid and parathyroid diseases, and acromegaly can minimize and prevent neurologic complications including myopathy. Recently proposed mechanisms of injury in patients with critical illness myopathy include inhibition of protein synthesis, mitochondrial dysfunction, disruption of the ubiquitin-proteasome system, oxidative stress, and disruption of intramuscular calcium homeostasis, which can cause a myosin-loss myopathy...
December 2016: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/27879562/effects-of-transport-temperature-on-the-stability-of-inflammatory-hemostasis-endothelial-function-and-oxidative-stress-plasma-biomarker-concentrations
#15
Octavia M Peck Palmer, Melinda Carter, Chung-Chou H Chang, Nicole Lucko, Vanessa M Jackson, Qian Sun, Xinyan Xie, Melanie Scott, John A Kellum, Arvind Venkat, Sachin Yende
BACKGROUND: A number of studies in critically ill patients are conducted outside the hospital. Specimens should ideally be transported from out-of-hospital setting to a laboratory using dry ice, but this approach is expensive and may not be feasible in some circumstances. We, therefore, examined the impact of temperature during transport of specimens on the precision of biomarker concentrations. OBJECTIVE: To determine the effects of transport temperature conditions on biomarker concentrations in specimens processed within 1 hour of collection...
November 22, 2016: Shock
https://www.readbyqxmd.com/read/27867755/nutritional-aspects-of-gastrointestinal-wound-healing
#16
REVIEW
Kaushik Mukherjee, Sandra L Kavalukas, Adrian Barbul
Significance: Although the wound healing cascade is similar in many tissues, in the gastrointestinal tract mucosal healing is critical for processes such as inflammatory bowel disease and ulcers and healing of the mucosa, submucosa, and serosal layers is needed for surgical anastomoses and for enterocutaneous fistula. Failure of wound healing can result in complications including infection, prolonged hospitalization, critical illness, organ failure, readmission, new or worsening enterocutaneous fistula, and even death...
November 1, 2016: Advances in Wound Care
https://www.readbyqxmd.com/read/27865148/plasma-adrenomedullin-in-critically-ill-patients-with-sepsis-after-major-surgery-a-pilot-study
#17
Tim-Philipp Simon, Lukas Martin, Sabine Doemming, Andreas Humbs, Christian Bruells, Ruedger Kopp, Oliver Hartmann, Joachim Struck, Andreas Bergmann, Gernot Marx, Tobias Schuerholz
PURPOSE: Adrenomedullin is released by different tissues in hypoxia, oxidative stress, and inflammation and is found in general and medical patients and, recently, in sepsis patients in emergency departments. The aim of this study was to evaluate biologically active adrenomedullin that mirrors directly the active peptide levels in plasma of surgical intensive care unit (ICU) patients with sepsis. MATERIALS AND METHODS: In this single-center observational pilot trial, 42 ICU patients with sepsis and 14 patients after major surgery were included after sepsis diagnosis or ICU admission...
April 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/27641738/vitamin-d-deficiency-is-associated-with-an-oxidized-plasma-cysteine-redox-potential-in-critically-ill-children
#18
Jessica A Alvarez, Jocelyn R Grunwell, Scott E Gillespie, Vin Tangpricha, Kiran B Hebbar
Critically ill populations incur high levels of oxidative stress and commonly present with vitamin D deficiency. This study aimed to investigate the relationship between vitamin D status and plasma markers of glutathione (GSH) and cysteine (Cys) redox and immunity in critically ill children. This was a cross-sectional study of n=50 PICU patients. Subjects were categorized according to their plasma 25-hydroxyvitamin D [25(OH)D] concentrations: (<20, 20-30, and ≥30ng/dL). Plasma GSH, glutathione disulfide (GSSG), Cys, and cystine (CySS) were measured with high-performance liquid chromatography, and their associated redox potentials determined (EhGSSG and EhCySS, respectively)...
September 15, 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27593695/mitochondrial-dysfunction-and-its-impact-on-diabetic-heart
#19
Suresh Kumar Verma, Venkata Naga Srikanth Garikipati, Raj Kishore
Mitochondrial dysfunction and associated oxidative stress are strongly linked to cardiovascular, neurodegenerative, and age associated disorders. More specifically cardiovascular diseases are common in patients with diabetes and significant contributor to the high mortality rates associated with diabetes. Studies have shown that the heart failure risk is increased in diabetic patients even after adjusting for coronary artery disease and hypertension. Although the actual basis of the increased heart failure risk is multifactorial, increasing evidences suggest that imbalances in mitochondrial function and associated oxidative stress play an important role in this process...
September 1, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27575447/heme-oxygenase-1-carbon-monoxide-regulated-mitochondrial-dynamic-equilibrium-contributes-to-the-attenuation-of-endotoxin-induced-acute-lung-injury-in-rats-and-in-lipopolysaccharide-activated-macrophages
#20
Jianbo Yu, Jia Shi, Dan Wang, Shuan Dong, Yuan Zhang, Man Wang, Lirong Gong, Qiang Fu, Daquan Liu
BACKGROUND: Sepsis-associated acute lung injury remains the major cause of mortality in critically ill patients and is characterized by marked oxidative stress and mitochondrial dysfunction. Mitochondrial dynamics are indispensable for functional integrity. Additionally, heme oxygenase (HO)-1/carbon monoxide conferred cytoprotection against end-organ damage during endotoxic shock. Herein, we tested the hypothesis that HO-1/carbon monoxide played a critical role in maintaining the dynamic process of mitochondrial fusion/fission to mitigate lung injury in Sprague-Dawley rats or RAW 264...
August 30, 2016: Anesthesiology
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