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Mechanical sepsis

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https://www.readbyqxmd.com/read/29137585/association-of-positive-fluid-balance-and-mortality-in-sepsis-and-septic-shock-in-an-australian-cohort
#1
M G Pittard, S J Huang, A S McLean, S R Orde
In patients with septic shock, a correlation between positive fluid balance and worsened outcomes has been reported in multiple observational studies worldwide. No published data exists in an Australasian cohort. We set out to explore this association in our institution. We conducted a retrospective audit of patient records from August 2012 to May 2015 in a single-centre, 24-bed surgical and medical intensive care unit (ICU) in Sydney, Australia. All patients with septic shock were included. Exclusion criteria included length of stay less than 24 hours or vasopressors needed for less than six hours...
November 2017: Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/29136027/expression-of-toll-like-receptors-tlrs-in-the-lungs-of-an-experimental-sepsis-mouse-model
#2
Anargyros Bakopoulos, Alkistis Kapelouzou, Diamantis I Tsilimigras, Michalis Katsimpoulas, Dimitrios Schizas, Chrysostomos Aravanis, Evaggelos Balafas, Manolis Mavroidis, Kitty Pavlakis, Anastasios Machairas, Theodore Liakakos
BACKGROUND: Sepsis is a condition characterized by high mortality rates and often accompanied by multiple-organ dysfunction. During sepsis, respiratory system may be affected and possibly result in acute respiratory distress syndrome (ARDS). Toll-like receptors (TLRs), as a first line defense against invading pathogens, seem to be highly expressed in septic states. Therefore, expression of TLRs in the lungs of a sepsis animal model could indicate the involvement of the respiratory system and appear as a severity index of the clinical course...
2017: PloS One
https://www.readbyqxmd.com/read/29136006/lipopolysaccharide-potentiates-platelet-responses-via-toll-like-receptor-4-stimulated-akt-erk-pla2-signalling
#3
Maria E Lopes Pires, Simon R Clarke, Sisi Marcondes, Jonathan M Gibbins
Lipopolysaccharide (LPS) from the cell envelope of Gram-negative bacteria is a principal cause of the symptoms of sepsis. LPS has been reported to modulate the function of platelets although the underlying mechanisms of LPS action in these cells remain unclear. Platelets express the Toll-like receptor 4 (TLR4) which serves as a receptor for LPS, although the potential role of TLR4 and associated cell signalling in controlling platelet responses to LPS has not been extensively explored. In this study, we therefore investigated the actions of LPS prepared from different strains of Escherichia coli on platelet function, the underlying signalling mechanisms, and the potential role of TLR4 in orchestrating these...
2017: PloS One
https://www.readbyqxmd.com/read/29135332/antibodies-to-pcpa-and-phtd-protect-mice-against-streptococcus-pneumoniae-by-a-macrophage-and-complement-dependent-mechanism
#4
Lucian Visan, Nicolas Rouleau, Emilie Proust, Loïc Peyrot, Arnaud Donadieu, Martina Ochs
Currently marketed Streptococcus pneumoniae (Spn) vaccines, which contain polysaccharide capsular antigens from the most common Spn serotypes, have substantially reduced pneumococcal disease rates but have limited coverage. A trivalent pneumococcal protein vaccine containing pneumococcal choline-binding protein A (PcpA), pneumococcal histidine triad protein D (PhtD), and detoxified pneumolysin is being developed to provide broader, cross-serotype protection. Antibodies against detoxified pneumolysin protect against bacterial pneumonia by neutralizing Spn-produced pneumolysin, but how anti-PhtD and anti-PcpA antibodies protect against Spn has not been established...
November 14, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29132456/-incidence-of-late-onset-sepsis-in-very-low-birth-weight-and-extremely-low-birth-weight-infants-and-risk-factors-for-late-onset-sepsis
#5
Xiao-Peng Zhao, Wei Zhou, Xu-Fang Li, Yan-Yan Song, Ting-Yan Zhang, Hong Liang
OBJECTIVE: To investigate the incidence of late-onset sepsis (LOS) in very low birth weight (VLBW) and extremely low birth weight (ELBW) infants in the neonatal intensive care unit (NICU) and the risk factors for LOS. METHODS: A retrospective analysis was performed for the clinical data of all VLBW and ELBW infants who were hospitalized in the NICU between January 2011 and December 2013. According to the presence or absence of LOS, these infants were divided into LOS group and non-LOS group...
November 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29130505/muscle-membrane-properties-in-a-pig-sepsis-model-effect-of-norepinephrine
#6
Delphine Boërio, Thiago D Corrêa, Stephan M Jakob, Karin A Ackermann, Hugh Bostock, Werner J Z'Graggen
INTRODUCTION: Sepsis-induced myopathy and critical illness myopathy are common causes of muscle weakness in intensive care patients. This study investigated the effect of different mean arterial blood pressure (MAP) levels on muscle membrane properties following experimental sepsis. METHODS: Sepsis was induced with faecal peritonitis in 12 out of 18 anesthetized and mechanically ventilated pigs. Seven were treated with a high (75-85 mm Hg) and 5 with a low (≥60 mm Hg) MAP target for resuscitation...
November 11, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/29128300/enteral-versus-parenteral-early-nutrition-in-ventilated-adults-with-shock-a-randomised-controlled-multicentre-open-label-parallel-group-study-nutrirea-2
#7
Jean Reignier, Julie Boisramé-Helms, Laurent Brisard, Jean-Baptiste Lascarrou, Ali Ait Hssain, Nadia Anguel, Laurent Argaud, Karim Asehnoune, Pierre Asfar, Frédéric Bellec, Vlad Botoc, Anne Bretagnol, Hoang-Nam Bui, Emmanuel Canet, Daniel Da Silva, Michael Darmon, Vincent Das, Jérôme Devaquet, Michel Djibre, Frédérique Ganster, Maité Garrouste-Orgeas, Stéphane Gaudry, Olivier Gontier, Claude Guérin, Bertrand Guidet, Christophe Guitton, Jean-Etienne Herbrecht, Jean-Claude Lacherade, Philippe Letocart, Frédéric Martino, Virginie Maxime, Emmanuelle Mercier, Jean-Paul Mira, Saad Nseir, Gael Piton, Jean-Pierre Quenot, Jack Richecoeur, Jean-Philippe Rigaud, René Robert, Nathalie Rolin, Carole Schwebel, Michel Sirodot, François Tinturier, Didier Thévenin, Bruno Giraudeau, Amélie Le Gouge
BACKGROUND: Whether the route of early feeding affects outcomes of patients with severe critical illnesses is controversial. We hypothesised that outcomes were better with early first-line enteral nutrition than with early first-line parenteral nutrition. METHODS: In this randomised, controlled, multicentre, open-label, parallel-group study (NUTRIREA-2 trial) done at 44 French intensive-care units (ICUs), adults (18 years or older) receiving invasive mechanical ventilation and vasopressor support for shock were randomly assigned (1:1) to either parenteral nutrition or enteral nutrition, both targeting normocaloric goals (20-25 kcal/kg per day), within 24 h after intubation...
November 8, 2017: Lancet
https://www.readbyqxmd.com/read/29127519/neutrophil-biology-within-hepatic-environment
#8
REVIEW
Débora Moreira Alvarenga, Matheus Silvério Mattos, Alan Moreira Araújo, Maísa Mota Antunes, Gustavo Batista Menezes
Neutrophils are the most abundant leukocyte in the human circulation. These short-lived cells are constantly produced from hematopoietic stem cells (HSC) within the bone marrow from which they daily reach the blood and perform major roles in innate immunity. Neutrophils are the first cells to reach inflamed tissues and are armed with a plethora of enzymes that help both with their trafficking within tissues and the killing of pathogens. Damaged or infected organs are rapidly invaded by neutrophils. Their erroneous activation within parenchyma or the vasculature is involved in the pathogenesis of several inflammatory diseases including arthritis, colitis, sepsis, acute lung injury and liver failure...
November 10, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/29127325/acinar-injury-and-early-cytokine-response-in-human-acute-biliary-pancreatitis
#9
Aparna Jakkampudi, Ramaiah Jangala, Ratnakar Reddy, Sasikala Mitnala, G Venkat Rao, Rebala Pradeep, D Nageshwar Reddy, Rupjyoti Talukdar
Clinical acute pancreatitis (AP) is marked by an early phase of systemic inflammatory response syndrome (SIRS) with multiorgan dysfunction (MODS), and a late phase characterized by sepsis with MODS. However, the mechanisms of acinar injury in human AP and the associated systemic inflammation are not clearly understood. This study, for the first time, evaluated the early interactions of bile acid induced human pancreatic acinar injury and the resulting cytokine response. We exposed freshly procured resected human pancreata to taurolithocolic acid (TLCS) and evaluated for acinar injury, cytokine release and interaction with peripheral blood mononuclear cells (PBMCs)...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29118766/the-role-of-endotoxin-in-the-setting-of-cardiorenal-syndrome-type-5
#10
REVIEW
Anna Clementi, Grazia Maria Virzì, Alessandra Brocca, Claudio Ronco
Lipopolysaccharide or endotoxin, the major cell wall component of gram-negative bacteria, plays a pivotal role in the pathogenesis of sepsis. It is able to activate the host defense system through the interaction with Toll-like receptor 4, thus triggering pro-inflammatory mechanisms. When the production of inflammatory mediators becomes uncontrolled and excessive, septic shock develops with multiple organ dysfunction, such as myocardial and renal impairment, which are hallmarks of cardiorenal syndrome type 5...
October 2017: Cardiorenal Medicine
https://www.readbyqxmd.com/read/29118755/apoptotic-cells-induced-signaling-for-immune-homeostasis-in-macrophages-and-dendritic-cells
#11
REVIEW
Uriel Trahtemberg, Dror Mevorach
Inefficient and abnormal clearance of apoptotic cells (efferocytosis) contributes to systemic autoimmune disease in humans and mice, and inefficient chromosomal DNA degradation by DNAse II leads to systemic polyarthritis and a cytokine storm. By contrast, efficient clearance allows immune homeostasis, generally leads to a non-inflammatory state for both macrophages and dendritic cells (DCs), and contributes to maintenance of peripheral tolerance. As many as 3 × 10(8) cells undergo apoptosis every hour in our bodies, and one of the primary "eat me" signals expressed by apoptotic cells is phosphatidylserine (PtdSer)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29118715/differential-regulation-of-thyroid-hormone-metabolism-target-genes-during-non-thyoidal-illness-syndrome-triggered-by-fasting-or-sepsis-in-adult-mice
#12
Klaus N Fontes, Adriana Cabanelas, Flavia F Bloise, Cherley Borba Vieira de Andrade, Luana L Souza, Marianna Wilieman, Isis H Trevenzoli, Lais C Agra, Johnatas D Silva, Christianne Bandeira-Melo, Pedro L Silva, Patricia R M Rocco, Tania M Ortiga-Carvalho
Fasting and sepsis induce profound changes in thyroid hormone (TH) central and peripheral metabolism. These changes affect TH action and are called the non-thyroidal illness syndrome (NTIS). To date, it is still debated whether NTIS represents an adaptive response or a real hypothyroid state at the tissue level. Moreover, even though it has been considered the same syndrome, we hypothesized that fasting and sepsis induce a distinct set of changes in thyroid hormone metabolism. Herein, we aimed to evaluate the central and peripheral expression of genes involved in the transport (MCT8/Slc16a2 and MCT10/Slc16a10), metabolism (Dio1, Dio2, and Dio3) and action (Thra and Thrb) of TH during NTIS induced by fasting or sepsis...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29118026/carbon-monoxide-in-lung-cell-physiology-and-disease
#13
Stefan W Ryter, Kevin C Ma, Augustine M K Choi
Carbon monoxide (CO) is an endogenously produced gas that has gained recognition as a biological signal transduction effector with properties similar, but not identical, to that of nitric oxide (NO). CO, which binds primarily to heme iron, may activate the hemoprotein guanylate cyclase (sGC), although with lower potency than NO. Furthermore, CO can modulate the activities of several cellular signaling molecules such as p38 MAPK, ERK1/2, JNK, AKT, NF-κB, and others. Emerging studies suggest that mitochondria, the energy-generating organelle of cells, represent a key target of CO action in eukaryotes...
November 8, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/29117994/role-of-adenosine-1a-receptor-signaling-on-gfr-early-after-the-induction-of-sepsis
#14
Jonathan M Street, Erik H Koritzinsky, Tiffany R Bellomo, Xuzhen Hu, Peter S T Yuen, Robert A Star
Sepsis and acute kidney injury (AKI) synergistically increase morbidity and mortality in the ICU. How sepsis reduces GFR and causes AKI is poorly understood; one proposed mechanism includes tubuloglomerular feedback (TGF). When sodium reabsorption by the proximal tubules is reduced in normal animals, the macula densa senses increased luminal sodium chloride, then adenosine 1a receptor (A1aR) signaling triggers tubuloglomerular feedback, reducing GFR through afferent arteriole vasoconstriction. We measured GFR and systemic hemodynamics early during cecal ligation and puncture-induced sepsis in wild-type and A1aR knockout mice...
November 8, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29117918/lack-of-soluble-circulating-cardiodepressant-factors-in-takotsubo-cardiomyopathy
#15
Chiara Sonnino, Benjamin W Van Tassell, Stefano Toldo, Marco Giuseppe Del Buono, F Gerard Moeller, Antonio Abbate
Circulating cardiodepressant factors were found to mediate cardiac dysfunction in patients with sepsis and acute systolic heart failure. To investigate the presence of circulating cardiodepressant factors in patients with Takotsubo Cardiomyopathy (TC), plasma samples were collected from 4 patients with TC, 3 with septic shock, 5 with acute systolic heart failure and 4 healthy controls and injected intraperitoneally in mice. The cardiodepressant effects are measured with transthoracic echocardiography. Plasma injection from control and TC subjects had no effects on left ventricle ejection fraction (LVEF) whereas plasma from the other two groups induced a significant reduction in LVEF...
November 2, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29116996/leptospirosis-in-icu-a-retrospective-study-of-134-consecutive-admissions
#16
Benjamin Delmas, Julien Jabot, Paul Chanareille, Cyril Ferdynus, Jérôme Allyn, Nicolas Allou, Loïc Raffray, Bernard-Alex Gaüzere, Olivier Martinet, David Vandroux
OBJECTIVES: Leptospirosis causes reversible multiple organ failure, and its mortality remains high. The aim of this study was to determine the mortality rate of leptospirosis in an ICU offering all types of organ support available nowadays and to compare it with mortality in bacterial sepsis. DESIGN: Retrospective, descriptive, and single-center cohort study. SETTINGS: The largest ICU of Reunion Island (Indian Ocean) in a teaching hospital...
November 7, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/29115466/recombinant-tsp53-modulates-intestinal-epithelial-barrier-integrity-via-upregulation-of-zo%C3%A2-1-in-lps%C3%A2-induced-septic-mice
#17
Jia Xu, Zhihao Liu, Wei Zhan, Ren Jiang, Chunhua Yang, Hong Zhan, Yan Xiong
Tight junctions (TJs) are a critical component in maintaining the intestinal mucosal barrier function and gastrointestinal health of animals. Gut barrier dysfunction contributes to the initiation and development of sepsis which induces an uncontrollable systemic inflammatory response and gives rise to life‑threatening clinical conditions. Excretory‑secretary antigens from Trichimella spiralis (T. spiralis) have been reported to protect from sepsis in a mouse model, however the mechanism remains to be elucidated...
November 3, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29114394/staphylococcus-caprae-bacteraemia-and-native-bone-infection-complicated-by-therapeutic-failure-and-elevated-mic-a-case-report
#18
Carolyn A Hilliard, Jad El Masri, Michihiko Goto
Introduction.Staphylococcus caprae is a coagulase-negative staphylococcus that has been reported in several cases as a human pathogen. However, it has rarely been reported as pathogen in native bone. Furthermore, the reported MIC levels noted in the literature for vancomycin were <2 µg ml(-)(1)making vancomycin a first line choice for infected patients. Case presentation. We report a case of Staphylococcus caprae causing osteomyelitis of the lumbar spine and bacteraemia and resulting in sepsis and ultimately the demise of a patient despite appropriate prolonged antibiotic therapy...
September 2017: JMM Case Reports
https://www.readbyqxmd.com/read/29114023/mcr-1-inhibition-with-peptide-conjugated-phosphorodiamidate-morpholino-oligomers-restores-sensitivity-to-polymyxin-in-escherichia-coli
#19
Seth M Daly, Carolyn R Sturge, Christina F Felder-Scott, Bruce L Geller, David E Greenberg
In late 2015, the first example of a transferrable polymyxin resistance mechanism in Gram-negative pathogens, MCR-1, was reported. Since that report, MCR-1 has been described to occur in many Gram-negative pathogens, and the mechanism of MCR-1-mediated resistance was rapidly determined: an ethanolamine is attached to lipid A phosphate groups, rendering the membrane more electropositive and repelling positively charged polymyxins. Acquisition of MCR-1 is clinically significant because polymyxins are frequently last-line antibiotics used to treat extensively resistant organisms, so acquisition of this mechanism might lead to pan-resistant strains...
November 7, 2017: MBio
https://www.readbyqxmd.com/read/29112541/european-guidelines-on-perioperative-venous-thromboembolism-prophylaxis-cardiovascular-and-thoracic-surgery
#20
Aamer B Ahmed, Andreas Koster, Marcus Lance, David Faraoni
: None of the predictive models for venous thromboembolism (VTE) prophylaxis have been designed for and validated in patients undergoing cardiothoracic and vascular surgery. The presence of one or more risk factors [age over 70 years old, transfusion of more than 4 U of red blood cells/fresh frozen plasma/cryoprecipitate, mechanical ventilation lasting more than 24 h, postoperative complication (e.g. acute kidney injury, infection/sepsis, neurological complication)] should place the cardiac population at high risk for VTE...
November 6, 2017: European Journal of Anaesthesiology
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