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oxidative stress in critically ill patients

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https://www.readbyqxmd.com/read/29875323/ripk3-promotes-sepsis-induced-acute-kidney-injury-via-mitochondrial-dysfunction
#1
Angara Sureshbabu, Edwin Patino, Kevin C Ma, Kristian Laursen, Eli J Finkelsztein, Oleh Akchurin, Thangamani Muthukumar, Stefan W Ryter, Lorraine Gudas, Augustine M K Choi, Mary E Choi
Sepsis causes acute kidney injury (AKI) in critically ill patients, although the pathophysiology remains unclear. The receptor-interacting protein kinase-3 (RIPK3), a cardinal regulator of necroptosis, has recently been implicated in the pathogenesis of human disease. In mice subjected to polymicrobial sepsis, we demonstrate that RIPK3 promotes sepsis-induced AKI. Utilizing genetic deletion and biochemical approaches in vitro and in vivo, we identify a potentially novel pathway by which RIPK3 aggravates kidney tubular injury independently of the classical mixed lineage kinase domain-like protein-dependent (MLKL-dependent) necroptosis pathway...
June 7, 2018: JCI Insight
https://www.readbyqxmd.com/read/29866457/distant-organ-dysfunction-in-acute-kidney-injury-a-review
#2
REVIEW
Sul A Lee, Martina Cozzi, Errol L Bush, Hamid Rabb
Acute kidney injury (AKI) is common in critically ill patients and is associated with increased morbidity and mortality. Dysfunction of other organs is an important cause of poor outcomes from AKI. Ample clinical and epidemiologic data show that AKI is associated with distant organ dysfunction in lung, heart, brain, and liver. Recent advancements in basic and clinical research have demonstrated physiologic and molecular mechanisms of distant organ interactions in AKI, including leukocyte activation and infiltration, generation of soluble factors such as inflammatory cytokines/chemokines, and endothelial injury...
June 1, 2018: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/29864039/vitamin-c-should-we-supplement
#3
Angélique M E Spoelstra-de Man, Paul W G Elbers, Heleen M Oudemans-Van Straaten
PURPOSE OF REVIEW: Hypovitaminosis C and vitamin C deficiency are very common in critically ill patients due to increased needs and decreased intake. Because vitamin C has pleiotropic functions, deficiency can aggravate the severity of illness and hamper recovery. RECENT FINDINGS: Vitamin C is a key circulating antioxidant with anti-inflammatory and immune-supporting effects, and a cofactor for important mono and dioxygenase enzymes. An increasing number of preclinical studies in trauma, ischemia/reperfusion, and sepsis models show that vitamin C administered at pharmacological doses attenuates oxidative stress and inflammation, and restores endothelial and organ function...
June 1, 2018: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/29845284/linarin-prevents-lps%C3%A2-induced-acute-lung-injury-by-suppressing-oxidative-stress-and-inflammation-via-inhibition-of-txnip-nlrp3-and-nf%C3%A2-%C3%AE%C2%BAb-pathways
#4
Xiang Han, Yi-Chen Wu, Min Meng, Qing-Song Sun, Su-Min Gao, Hong Sun
Acute lung injury (ALI) is an important cause of morbidity and mortality for critically ill patients, and linarin (LR) may be a potential treatment for ALI as it reportedly has antioxidant, anti‑inflammatory and apoptotic‑regulating activity. In the present study, the authors report that saline and LR (12.5, 25 and 50 mg/kg) were applied to male C57BL/6 mice via gavage. Then, mice were intratracheally injected with either saline or lipopolysaccharide (LPS). LR‑pretreatment attenuated LPS‑induced ALI and platelet activation and reduced CD41 expression levels and neutrophil platelet aggregates...
May 30, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29803894/impact-of-selective-serotonin-reuptake-inhibitors-ssris-during-pregnancy-and-lactation-a-focus-on-short-and-long-term-vascular-effects
#5
REVIEW
S Zullino, T Simoncini
SSRIs are the first choice for the treatment of mood disorders during pregnancy and lactation. Despite the known side effects, the benefits/risks balance suggests their use. Hypertensive disorders of pregnancy (HDP) and Intrauterine growth restriction (IUGR) are the main vascular effects of these drugs, with mechanisms that involves endothelial dysfunction in feto-placental system. These data are supported by animal models, even if preliminary findings are not yet adequately supported by molecular and clinical data...
May 24, 2018: Vascular Pharmacology
https://www.readbyqxmd.com/read/29765492/editorial-oxidative-stress-in-the-critically-ill-patients-pathophysiology-and-potential-interventions
#6
EDITORIAL
Demosthenes Makris, Peter R Mertens, Evangelia Dounousi, Gregory Giamouzis, Saad Nseir
No abstract text is available yet for this article.
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29742788/-the-relevance-of-hemolysis-in-anesthesia-and-intensive-care-medicine
#7
Jan A Graw, David M Baron, Roland C E Francis
Hemolysis leads to an increase of circulating intravascular cell-free hemoglobin. Increased plasma concentrations of cell-free hemoglobin are relevant in critically ill patients because cell-free hemoglobin causes vasoconstriction by depletion of endothelial nitric oxide, oxidative stress, and inflammation. Furthermore, cell-free hemoglobin contributes to tissue injuries such as renal failure and intestinal mucosa damage after cardiac surgery. High concentrations of cell-free hemoglobin are associated with an increased mortality in patients with sepsis...
April 2018: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/29644922/chemerin-rs17173608-and-vaspin-rs2236242-gene-variants-on-the-risk-of-end-stage-renal-disease-esrd-and-correlation-with-plasma-malondialdehyde-mda-level
#8
Hamid Nomani, Hamid Khanmohamadian, Asad Vaisi-Raygani, Ebrahim Shakiba, Maryam Tanhapour, Zohreh Rahimi
INTRODUCTION: End-stage renal disease (ESRD) is associated with critical kidney illness that seriously affects the lifespan. Genetic factors and oxidative stress could play critical role in the development of ESRD. We assessed the association between chemerin rs17173608 T/G and vaspin rs2236242 T/A genes variants with the risk of ESRD and their correlation with plasma malondialdehyde (MDA) level. MATERIALS AND METHODS: In a case-control study, 131 gender and age-matched unrelated healthy controls and 110 ESRD patients were enrolled...
November 2018: Renal Failure
https://www.readbyqxmd.com/read/29500815/role-of-g-protein-coupled-receptor-kinase-2-in-oxidative-and-nitrosative-stress-related-neurohistopathological-changes-in-a-mouse-model-of-sepsis-associated-encephalopathy
#9
Masaaki Kawakami, Mizuki Hattori, Wakana Ohashi, Toshio Fujimori, Kohshi Hattori, Mariko Takebe, Kengo Tomita, Hiroki Yokoo, Naoyuki Matsuda, Mitsuaki Yamazaki, Yuichi Hattori
Sepsis-associated encephalopathy (SAE), characterized as diffuse brain dysfunction and neurological manifestations secondary to sepsis, is a common complication in critically ill patients and can give rise to poor outcome, but understanding the molecular basis of this disorder remains a major challenge. Given the emerging role of G protein-coupled receptor 2 (GRK2), first identified as a G protein-coupled receptor (GPCR) regulator, in the regulation of non-G protein-coupled receptor-related molecules contributing to diverse cellular functions and pathology, including inflammation, we tested the hypothesis that GRK2 may be linked to the neuropathogenesis of SAE...
March 3, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29463275/leukocyte-telomere-length-in-paediatric-critical-illness-effect-of-early-parenteral-nutrition
#10
Sören Verstraete, Ilse Vanhorebeek, Esther van Puffelen, Inge Derese, Catherine Ingels, Sascha C Verbruggen, Pieter J Wouters, Koen F Joosten, Jan Hanot, Gonzalo G Guerra, Dirk Vlasselaers, Jue Lin, Greet Van den Berghe
BACKGROUND: Children who have suffered from critical illnesses that required treatment in a paediatric intensive care unit (PICU) have long-term physical and neurodevelopmental impairments. The mechanisms underlying this legacy remain largely unknown. In patients suffering from chronic diseases hallmarked by inflammation and oxidative stress, poor long-term outcome has been associated with shorter telomeres. Shortened telomeres have also been reported to result from excessive food consumption and/or unhealthy nutrition...
February 21, 2018: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29462455/systemic-biomarkers-of-accelerated-aging-in-schizophrenia-a-critical-review-and-future-directions
#11
Tanya T Nguyen, Lisa T Eyler, Dilip V Jeste
BACKGROUND: Schizophrenia is associated with increased physical morbidity and early mortality, suggesting that the aging process may be accelerated in schizophrenia. However, the biological underpinnings of these alterations in aging in schizophrenia are unclear. METHOD: We conducted a detailed search of peer-reviewed empirical studies to evaluate evidence for accelerated biological aging in schizophrenia based on systemic, age-related biomarkers. We included studies that investigated differences between persons with schizophrenia and healthy comparison subjects in levels of biomarkers known to be associated with aging and examined the relationship of these biomarkers to age in the 2 groups...
February 15, 2018: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29439480/appropriate-handling-processing-and-analysis-of-blood-samples-is-essential-to-avoid-oxidation-of-vitamin-c-to-dehydroascorbic-acid
#12
Juliet M Pullar, Simone Bayer, Anitra C Carr
Vitamin C (ascorbate) is the major water-soluble antioxidant in plasma and its oxidation to dehydroascorbic acid (DHA) has been proposed as a marker of oxidative stress in vivo. However, controversy exists in the literature around the amount of DHA detected in blood samples collected from various patient cohorts. In this study, we report on DHA concentrations in a selection of different clinical cohorts (diabetes, pneumonia, cancer, and critically ill). All clinical samples were collected into EDTA anticoagulant tubes and processed at 4 °C prior to storage at -80 °C for subsequent analysis by HPLC with electrochemical detection...
February 11, 2018: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29364955/removal-of-stabilizers-from-human-serum-albumin-by-adsorbents-and-dialysis-used-in-blood-purification
#13
Stephan Harm, Claudia Schildböck, Jens Hartmann
INTRODUCTION: Human serum albumin (HSA) is a monomeric multi-domain protein that possesses an extraordinary binding capacity. It plays an important role in storing and transporting endogenous substances, metabolites, and drugs throughout the human circulatory system. Clinically, HSA is used to treat a variety of diseases such as hypovolemia, shock, burns, hemorrhage, and trauma in critically ill patients. Pharmaceutical-grade HSA contains the stabilizers sodium caprylate and N-acetyltryptophanate to protect the protein from oxidative stress and to stabilize it for heat treatment which is applied for virus inactivation...
2018: PloS One
https://www.readbyqxmd.com/read/29334496/oxygen-in-the-critically-ill-friend-or-foe
#14
Elisa Damiani, Abele Donati, Massimo Girardis
PURPOSE OF REVIEW: To examine the potential harmful effects of hyperoxia and summarize the results of most recent clinical studies evaluating oxygen therapy in critically ill patients. RECENT FINDINGS: Excessive oxygen supplementation may have detrimental pulmonary and systemic effects because of enhanced oxidative stress and inflammation. Hyperoxia-induced lung injury includes altered surfactant protein composition, reduced mucociliary clearance and histological damage, resulting in atelectasis, reduced lung compliance and increased risk of infections...
April 2018: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/29310566/analysis-of-oxidative-stress-related-markers-in-critically-ill-polytrauma-patients-an-observational-prospective-single-center-study
#15
Mihai Sandesc, Alexandru Florin Rogobete, Ovidiu Horea Bedreag, Anca Dinu, Marius Papurica, Carmen Alina Cradigati, Mirela Sarandan, Sonia Elena Popovici, Lavinia Melania Bratu, Tiberiu Bratu, Adrian Tudor Stan, Dorel Sandesc
Critically ill polytrauma patients have increased production of free radicals (FRs) and consequent alterations in biochemical pathways, as well as disruption of cellular integrity, due to increased lipid peroxidation. The aim of this study was to investigate several biomarkers associated with increased oxidative stress in critically ill polytrauma patients, and to evaluate the effect of antioxidant treatment on the clinical outcome in these patients. A total of 67 polytrauma patients from an intensive care unit met the selection criteria...
January 9, 2018: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29291552/carvacrol-attenuates-histopathogic-and-functional-impairments-induced-by-bilateral-renal-ischemia-reperfusion-in-rats
#16
Hulya Ozturk, Ayhan Cetinkaya, Selma Erdogan Duzcu, Buket Kin Tekce, Hayrettin Ozturk
BACKGROUND: Renal ischemia/reperfusion injury is the most common cause of acute kidney injury, which frequent occurrence in critically ill patients. OBJECTIVES: The aim of this study was to investigate the role of Carvacrol (CARV) against bilateral ischemia reperfusion (I/R) in rats. METHODS: Renal I/R injury were induced by clamping of the left and right renal arteries for 45 min followed by 24 h of reperfusion. Thirty male Sprague-Dawley rats were randomly allocated to three groups (n = 10): the sham-control group, the renal I/R-untreated (I/R-untreated) group, and the I/R-CARV-treated group...
February 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29273022/on-line-hemodiafiltration-did-not-induce-an-overproduction-of-oxidative-stress-and-inflammatory-cytokines-in-intensive-care-unit-acute-kidney-injury
#17
Kada Klouche, Laurent Amigues, Marion Morena, Vincent Brunot, Anne Marie Dupuy, Audrey Jaussent, Marie Christine Picot, Noémie Besnard, Delphine Daubin, Jean Paul Cristol
BACKGROUND: Though on-line intermittent hemodiafiltration (OL-IHDF) is a routine therapy for chronic dialysis patients, it is not yet widespread used in critically ill patients. This study was undergone to evaluate efficiency and tolerance of OL-IHDF and to appreciate inflammatory consequences of its use in intensive care unit (ICU)-acute kidney injury (AKI) patients. METHODS: In this prospective cohort study conducted in a medical academic ICU in France, 30 AKI patients who underwent OL-IHDF were included...
December 22, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/29173163/tocopherol-and-tocotrienol-therapeutic-potential-in-animal-models-of-stress
#18
Mohd Fahami Nur Azlina, Yusof Kamisah, Mohd Saad Qodriyah
BACKGROUND: Scientific reports had shown that stress is related to numerous pathological changes in the body. These pathological changes can bring about numerous diseases and can significantly cause negative effects in an individual. These include gastric ulcer, liver pathology and neurobehavioral changes. A common pathogenesis in many diseases related to stress involves oxidative damage. Therefore, the administration of antioxidants such as vitamin E is a reasonable therapeutic approach...
November 22, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/29129241/zinc-and-selenium-status-in-critically-ill-patients-according-to-severity-stratification
#19
Marina Augusta Cirino Ruocco, Evelin Drociunas Pacheco Cechinatti, Fernando Barbosa, Anderson Marliere Navarro
OBJECTIVE: The aim of this study was to evaluate the concentrations of zinc and selenium in different biological materials and to associate them with the clinical severity score according to the Simplified Acute Physiology Score (SAPS) III. METHODS: The study was conducted in a 10-bed general intensive care unit of the Américo Brasiliense State Hospital/SP, with 95 patients stratified by the SAPS III score cutoff points (63.5 points) as less or more severe and by the diagnosis of sepsis...
January 2018: Nutrition
https://www.readbyqxmd.com/read/29104728/oxidative-stress-and-acute-kidney-injury-in-critical-illness-pathophysiologic-mechanisms-biomarkers-interventions-and-future-perspectives
#20
REVIEW
Paraskevi Pavlakou, Vassilios Liakopoulos, Theodoros Eleftheriadis, Michael Mitsis, Evangelia Dounousi
Acute kidney injury (AKI) is a multifactorial entity that occurs in a variety of clinical settings. Although AKI is not a usual reason for intensive care unit (ICU) admission, it often complicates critically ill patients' clinical course requiring renal replacement therapy progressing sometimes to end-stage renal disease and increasing mortality. The causes of AKI in the group of ICU patients are further complicated from damaged metabolic state, systemic inflammation, sepsis, and hemodynamic dysregulations, leading to an imbalance that generates oxidative stress response...
2017: Oxidative Medicine and Cellular Longevity
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