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Mechanical sepsis

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https://www.readbyqxmd.com/read/28219766/mitochondrial-and-endoplasmic-reticulum-dysfunction-and-related-defense-mechanisms-in-critical-illness-induced-multiple-organ-failure
#1
REVIEW
Steven E Thiessen, Greet Van den Berghe, Ilse Vanhorebeek
Patients with critical illness-induced multiple organ failure suffer from a very high morbidity and mortality, despite major progress in intensive care. The pathogenesis of this condition is complex and incompletely understood. Inadequate tissue perfusion and an overwhelming inflammatory response with pronounced cellular damage have been suggested to play an important role, but interventions targeting these disturbances largely failed to improve patient outcome. Hence, new therapeutic perspectives are urgently needed...
February 17, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28218355/mechanisms-of-endothelial-activation-in-sepsis-and-cell-culture-models-to-study-the-heterogeneous-host-response
#2
Tanja Eichhorn, Michael B Fischer, Viktoria Weber
Sepsis is currently viewed as a fundamental disintegration of control functions from intracellular signalling to immunoregulatory and neuroendocrine mechanisms. The immediate threat in sepsis is invasive infection, and the need to activate immune defense mechanisms to clear the pathogen before irreparable damage occurs. In the process of pathogen elimination, however, the systemic host response to infection may cause collateral damage to the endothelium and may lead to the destruction of host tissues.A number of experimental models have been developed to monitor endothelial activation and to study endothelial dysfunction under septic conditions...
February 13, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28212865/casein-kinase-2-interacting-protein-1-regulates-m1-and-m2-inflammatory-macrophage-polarization
#3
Yuhan Chen, Wen Liu, Yiwu Wang, Luo Zhang, Jun Wei, Xueli Zhang, Fuchu He, Lingqiang Zhang
The importance of macrophage plasticity, albeit being discovered recently, has been highlighted in a broad spectrum of biological processes operative in physiological and pathological environments. Macrophage polarized activation and inactivation has profound effects on immune and inflammatory responses with several major pathways being elucidated in the past few years. However, transcriptional regulation mechanisms governing macrophage polarization is still preliminary. In this study, we identify the Casein Kinase 2 Interacting Protein 1 (CKIP-1) as a molecular toggle manipulating macrophage speciation...
February 14, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28212163/multiple-organ-dysfunction-in-children-mechanically-ventilated-for-acute-respiratory-failure
#4
Scott L Weiss, Lisa A Asaro, Heidi R Flori, Geoffrey L Allen, David Wypij, Martha A Q Curley
OBJECTIVES: The impact of extrapulmonary organ dysfunction, independent from sepsis and lung injury severity, on outcomes in pediatric acute respiratory failure is unclear. We sought to determine the frequency, timing, and risk factors for extrapulmonary organ dysfunction and the independent association of multiple organ dysfunction syndrome with outcomes in pediatric acute respiratory failure. DESIGN: Secondary observational analysis of the Randomized Evaluation of Sedation Titration for Respiratory Failure cluster-randomized prospective clinical trial conducted between 2009 and 2013...
February 16, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28203237/activation-of-the-wnt-pathway-by-mycobacterium-tuberculosis-a-wnt-wnt-situation
#5
REVIEW
Tomás Villaseñor, Edgardo Madrid-Paulino, Rafael Maldonado-Bravo, Antonio Urbán-Aragón, Leonor Pérez-Martínez, Gustavo Pedraza-Alva
Mycobacterium tuberculosis (M. tuberculosis), an intracellular pathogenic Gram-positive bacterium, is the cause of tuberculosis (TB), a major worldwide human infectious disease. The innate immune system is the first host defense against M. tuberculosis. The recognition of this pathogen is mediated by several classes of pattern recognition receptors expressed on the host innate immune cells, including Toll-like receptors, Nod-like receptors, and C-type lectin receptors like Dectin-1, the Mannose receptor, and DC-SIGN...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28202033/use-of-stepwise-lactate-kinetics-oriented-hemodynamic-therapy-could-improve-the-clinical-outcomes-of-patients-with-sepsis-associated-hyperlactatemia
#6
Xiang Zhou, Dawei Liu, Longxiang Su, Bo Yao, Yun Long, Xiaoting Wang, Wenzhao Chai, Na Cui, Hao Wang, Xi Rui
BACKGROUND: Setting lactate kinetics at >30% might improve the clinical outcomes of patients with sepsis-associated hyperlactatemia. The aim of this study was to explore the outcome benefits of stepwise lactate kinetics vs central venous oxygen saturation (ScvO2)-oriented hemodynamic therapy at 6 h as the protocol goal during early resuscitation. METHODS: The relevant parameters and adverse events after different targets in 360 randomly assigned patients with sepsis-associated hyperlactatemia were recorded and compared...
February 16, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28201995/zoonotic-necrotizing-myositis-caused-by-streptococcus-equi-subsp-zooepidemicus-in-a-farmer
#7
Bård Reiakvam Kittang, Veronika Kuchařová Pettersen, Oddvar Oppegaard, Dag Harald Skutlaberg, Håvard Dale, Harald G Wiker, Steinar Skrede
BACKGROUND: Streptococcus equi subsp. zooepidemicus is a beta-hemolytic group C streptococcus mainly causing infections in domesticated animals. Here we describe the first case of zoonotic necrotizing myositis caused by this bacterium. CASE PRESENTATION: The patient was a 73-year-old, previously healthy farmer with two asymptomatic Shetland ponies in his stable. After close contact with the ponies while feeding them, he rapidly developed erythema of his left thigh and sepsis with multiple organ failure...
February 15, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28198754/relationship-between-adverse-tracheal-intubation-associated-events-and-picu-outcomes
#8
Margaret M Parker, Gabrielle Nuthall, Calvin Brown, Katherine Biagas, Natalie Napolitano, Lee A Polikoff, Dennis Simon, Michael Miksa, Eleanor Gradidge, Jan Hau Lee, Ashwin S Krishna, David Tellez, Geoffrey L Bird, Kyle J Rehder, David A Turner, Michelle Adu-Darko, Sholeen T Nett, Ashley T Derbyshire, Keith Meyer, John Giuliano, Erin B Owen, Janice E Sullivan, Keiko Tarquinio, Pradip Kamat, Ronald C Sanders, Matthew Pinto, G Kris Bysani, Guillaume Emeriaud, Yuki Nagai, Melissa A McCarthy, Karen H Walson, Paula Vanderford, Anthony Lee, Jesse Bain, Peter Skippen, Ryan Breuer, Sarah Tallent, Vinay Nadkarni, Akira Nishisaki
OBJECTIVE: Tracheal intubation in PICUs is a common procedure often associated with adverse events. The aim of this study is to evaluate the association between immediate events such as tracheal intubation associated events or desaturation and ICU outcomes: length of stay, duration of mechanical ventilation, and mortality. STUDY DESIGN: Prospective cohort study with 35 PICUs using a multicenter tracheal intubation quality improvement database (National Emergency Airway Registry for Children: NEAR4KIDS) from January 2013 to June 2015...
February 14, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28197046/outcome-of-noncardiac-surgical-patients-admitted-to-a-multidisciplinary-intensive-care-unit
#9
Pradeep Kumar, M K Renuka, M S Kalaiselvan, A S Arunkumar
CONTEXT: Surgical procedures carry significant morbidity and mortality depending on the type of surgery and patients. There is a dearth of evidence from India on the outcome of surgical patients admitted to an Intensive Care Unit (ICU). AIMS: We aimed to describe the incidence and risk factors of postoperative complications and mortality in noncardiac surgical patients admitted to the ICU. SETTINGS AND DESIGN: This was a prospective observational study on all perioperative patients admitted to a multidisciplinary ICU for 18 months...
January 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28196749/recent-insights-into-the-molecular-mechanisms-underlying-pyroptosis-and-gasdermin-family-functions
#10
REVIEW
Robin A Aglietti, Erin C Dueber
Pyroptosis is an inflammatory form of cell death that not only protects multicellular organisms from invading pathogenic bacteria and microbial infections, but can also lead to sepsis and lethal septic shock if overactivated. Here, we present an overview of recent developments within the pyroptosis field, beginning with the discovery of Gasdermin D (GSDMD) as a substrate of caspase-1 and caspase-11 upon detection of cytosolic lipopolysaccharide (LPS). Cleavage releases the N-terminal domain of GSDMD, causing it to form cytotoxic pores in the plasma membrane of cells...
February 11, 2017: Trends in Immunology
https://www.readbyqxmd.com/read/28194608/rage-deficiency-attenuates-the-protective-effect-of-lidocaine-against-sepsis-induced-acute-lung-injury
#11
Zhuo Zhang, Jie Zhou, Changli Liao, Xiaobing Li, Minghua Liu, Daqiang Song, Xian Jiang
Lidocaine (Lido) is reported to suppress inflammatory responses and exhibit a therapeutic effect in models of cecal ligation and puncture (CLP)-induced acute lung injury (ALI). The receptor for advanced glycation end product (RAGE) exerts pro-inflammatory effects by enhancing pro-inflammatory cytokine production. However, the precise mechanism by which Lido confers protection against ALI is not clear. ALI was induced in RAGE WT and RAGE knockout (KO) rats using cecal ligation and puncture (CLP) operations for 24 h...
February 13, 2017: Inflammation
https://www.readbyqxmd.com/read/28193899/structure-of-a-lipid-a-phosphoethanolamine-transferase-suggests-how-conformational-changes-govern-substrate-binding
#12
Anandhi Anandan, Genevieve L Evans, Karmen Condic-Jurkic, Megan L O'Mara, Constance M John, Nancy J Phillips, Gary A Jarvis, Siobhan S Wills, Keith A Stubbs, Isabel Moraes, Charlene M Kahler, Alice Vrielink
Multidrug-resistant (MDR) gram-negative bacteria have increased the prevalence of fatal sepsis in modern times. Colistin is a cationic antimicrobial peptide (CAMP) antibiotic that permeabilizes the bacterial outer membrane (OM) and has been used to treat these infections. The OM outer leaflet is comprised of endotoxin containing lipid A, which can be modified to increase resistance to CAMPs and prevent clearance by the innate immune response. One type of lipid A modification involves the addition of phosphoethanolamine to the 1 and 4' headgroup positions by phosphoethanolamine transferases...
February 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28190434/intensive-care-unit-acquired-weakness
#13
J Horn, G Hermans
When critically ill, a severe weakness of the limbs and respiratory muscles often develops with a prolonged stay in the intensive care unit (ICU), a condition vaguely termed intensive care unit-acquired weakness (ICUAW). Many of these patients have serious nerve and muscle injury. This syndrome is most often seen in surviving critically ill patients with sepsis or extensive inflammatory response which results in increased duration of mechanical ventilation and hospital length of stay. Patients with ICUAW often do not fully recover and the disability will seriously impact on their quality of life...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28189043/type-i-interferon-signalling-is-not-required-for-the-induction-of-endotoxin-tolerance
#14
Yalda Karimi, Sophie M Poznanski, Fatemeh Vahedi, Branson Chen, Marianne V Chew, Amanda J Lee, Ali A Ashkar
Endotoxin, or LPS tolerance, is an immunomodulatory mechanism that results in a significantly diminished response to secondary LPS exposure, which may serve to protect the host against endotoxic shock. Type I interferons (IFNs) are cytokines released upon LPS binding to TLR4 and have been shown to have immunomodulatory properties. Due to this regulatory function of type I IFN, we aimed to investigate the role of type I IFN signalling in LPS tolerance. Our data suggests that type I IFN does not play a role in LPS tolerance in vitro, as both wild type and IFNAR1(-/-) peritoneal macrophages showed reduced cytokine production after secondary LPS exposure...
February 8, 2017: Cytokine
https://www.readbyqxmd.com/read/28188008/risk-factors-for-development-of-pulmonary-hypertension-in-infants-with-bronchopulmonary-dysplasia-systematic-review-and-meta-analysis
#15
REVIEW
Mohamed Nagiub, Usama Kanaan, Dawn Simon, Lokesh Guglani
OBJECTIVES: Preterm infants with bronchopulmonary dysplasia (BPD) are at increased risk for development of Pulmonary Hypertension (PHT). We performed a systematic review and meta-analysis to identify risk factors for development of PHT in infants with BPD. STUDY DESIGN: A systematic review identified risk factors for the development of PHT in infants with BPD. A meta-analysis of the pooled data was performed for each individual risk factor. RESULT: Of the 20 risk factors identified, 10 were repeated more than once in nine studies...
November 22, 2016: Paediatric Respiratory Reviews
https://www.readbyqxmd.com/read/28187268/fibroblast-growth-factor-signaling-mediates-pulmonary-endothelial-glycocalyx-reconstitution
#16
Yimu Yang, Sarah M Haeger, Matthew A Suflita, Fuming Zhang, Kyrie L Dailey, James F Colbert, Joshay A Ford, Mario A Picon, Robert S Stearman, Lei Lin, Xinyue Liu, Xiaorui Han, Robert J Linhardt, Eric P Schmidt
RATIONALE: The endothelial glycocalyx is a heparan sulfate-rich endovascular structure critical to endothelial function. Accordingly, endothelial glycocalyx degradation during sepsis contributes to tissue edema and organ injury. OBJECTIVE: We determined the endogenous mechanisms governing pulmonary endothelial glycocalyx reconstitution, and if these reparative mechanisms are impaired during sepsis. METHODS: We performed intravital microscopy of wild-type and transgenic mice to determine the rapidity of pulmonary endothelial glycocalyx reconstitution after non-septic (heparinase-III-mediated) or septic (cecal ligation and puncture-mediated) endothelial glycocalyx degradation...
February 10, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28187038/minocycline-prevents-the-impairment-of-hippocampal-long-term-potentiation-in-the-septic-mouse
#17
Koji Hoshino, Mineji Hayakawa, Yuji Morimoto
Sepsis-associated encephalopathy is a major complication during sepsis, and an effective treatment remains unknown. Although minocycline (MINO) has neuroprotective effects and is an attractive candidate for treating sepsis-associated encephalopathy, the effect of MINO on synaptic plasticity during sepsis is still unclear. In the present study, we investigated the effects of MINO on long-term potentiation (LTP) in the hippocampus in a cecal ligation and puncture (CLP) mouse model. We divided mice into 4 groups; (1) sham + vehicle, (2) sham + MINO (60 mg/kg, i...
February 9, 2017: Shock
https://www.readbyqxmd.com/read/28186706/concise-review-mesenchymal-stromal-cell-based-approaches-for-the-treatment-of-acute-respiratory-distress-and-sepsis-syndromes
#18
Christian L Johnson, Yorick Soeder, Marc H Dahlke
Despite extensive research on candidate pharmacological treatments and a significant and increasing prevalence, sepsis syndrome, and acute respiratory distress syndrome (ARDS) remain areas of unmet clinical need. Preclinical studies examining mesenchymal stromal cell (MSCs) based-therapies have provided compelling evidence of potential benefit; however, the precise mechanism by which MSCs exert a therapeutic influence, and whether MSC application is efficacious in humans, remains unknown. Detailed evaluation of the limited number of human trials so far completed is further hampered as a result of variations in trial design and biomarker selection...
January 9, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28185753/predicting-the-incremental-hospital-cost-of-adverse-events-among-medicare-beneficiaries-in-the-comprehensive-joint-replacement-program-during-fiscal-year-2014
#19
Steven D Culler, David S Jevsevar, Kevin J McGuire, Kevin G Shea, Kenneth M Little, Michael J Schlosser
BACKGROUND: The Medicare program's Comprehensive Care for Joint Replacement (CJR) payment model places hospitals at financial risk for the treatment cost of Medicare beneficiaries (MBs) undergoing lower extremity joint replacement (LEJR). METHODS: This study uses Medicare Provider Analysis and Review File and identified 674,777 MBs with LEJR procedure during fiscal year 2014. Adverse events (death, acute myocardial infarction, pneumonia, sepsis or shock, surgical site bleeding, pulmonary embolism, mechanical complications, and periprosthetic joint infection) were studied...
January 16, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28183542/impact-of-ejection-fraction-on-infectious-renal-and-respiratory-morbidity-for-patients-undergoing-noncardiac-surgery
#20
Michael D Maile, William F Armstrong, Elizabeth S Jewell, Milo C Engoren
OBJECTIVE: We sought to determine if decreased left ventricular systolic function was associated with an increased risk of postoperative infectious, respiratory, or renal complications in patients undergoing noncardiac surgery. DESIGN: Retrospective cohort study. SETTING: Single tertiary-care, university-based medical center. PATIENTS: We studied individuals who participated in the American College of Surgeons National Quality Improvement Program and had a preoperative echocardiogram conducted at our institution...
February 2017: Journal of Clinical Anesthesia
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