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https://www.readbyqxmd.com/read/28108420/neutrophil-derived-microparticles-increase-mortality-and-the-counter-inflammatory-response-in-a-murine-model-of-sepsis
#1
Bobby L Johnson, Emily F Midura, Priya S Prakash, Teresa C Rice, Natalia Kunz, Kathrin Kalies, Charles C Caldwell
Although advances in medical care have significantly improved sepsis survival, sepsis remains the leading cause of death in the ICU. This is likely due to a lack of complete understanding of the pathophysiologic mechanisms that lead to dysfunctional immunity. Neutrophil derived microparticles (NDMPs) have been shown to be the predominant microparticle present at infectious and inflamed foci in human models, however their effect on the immune response to inflammation and infection is sepsis has not been fully elucidated...
January 17, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28108242/evaluation-of-the-antimicrobial-activity-of-the-mastoparan-polybia-mpii-isolated-from-venom-of-the-social-wasp-pseudopolybia-vespiceps-testacea-vespidae-hymenoptera
#2
Juliana C Silva, Lázaro M Neto, Rogério C Neves, Jaqueline C Gonçalves, Monalisa M Trentini, Ricardo Mucury-Filho, Karina S Smidt, Isabel C Fensterseifer, Osmar N Silva, Lilian D Lima, Patricia B Clissa, Nathália Vilela, Fernanda Guilhelmelli, Luciano P Silva, Marisa Rangel, André Kipnis, Ildinete Silva-Pereira, Octavio L Franco, Ana P Junqueira-Kipnis, Anamelia L Bocca, Márcia R Mortari
Mastoparans, a class of peptides found in wasp venom, have significant effects following a sting as well as useful applications in clinical practice. Among these is their potential use in the control of micro-organisms that cause infectious diseases with a significant impact on society. Thus, the present study describes the isolation and identification of a mastoparan peptide from the venom of the social wasp Pseudopolybia vespiceps and evaluated its antimicrobial profile against bacteria (Staphylococcus aureus and Mycobacterium abscessus subsp...
January 9, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28088889/-spontaneous-bacterial-peritonitis
#3
Bálint Velkey, Eszter Vitális, Zsuzsanna Vitális
Spontaneous bacterial peritonitis occurs most commonly in cirrhotic patients with ascites. Pathogens get into the circulation by intestinal translocation and colonize in peritoneal fluid. Diagnosis of spontaneous bacterial peritonitis is based on elevated polymorphonuclear leukocyte count in the ascites (>0,25 G/L). Ascites culture is often negative but aids to get information about antibiotic sensitivity in positive cases. Treatment in stable patient can be intravenous then orally administrated ciprofloxacin or amoxicillin/clavulanic acid, while in severe cases intravenous III...
January 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28088353/expansion-and-differentiation-of-igm-b-cells-in-the-rainbow-trout-peritoneal-cavity-in-response-to-different-antigens
#4
Rosario Castro, Beatriz Abós, Lucia González, Aitor G Granja, Carolina Tafalla
To date, intraperitoneal (i.p.) injection seems to be the most effective vaccination route in aquaculture, as many i.p. administered fish vaccines are capable of conferring strong and long-lasting immune responses. Despite this, how peritoneal leukocytes are regulated upon antigen encounter has only been scarcely studied in fish. Although, in the past, myeloid cells were thought to be the main responders to peritoneal inflammation, a recent study revealed that IgM(+) B cells are one of the main cell types in the teleost peritoneal cavity in response to pathogenic bacteria...
January 11, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28074870/microrna-155-is-upregulated-in-ascites-in-patients-with-spontaneous-bacterial-peritonitis
#5
Philipp Lutz, Mohamed M Haimid, Alessandra Pohlmann, Jennifer Lehmann, Christian Jansen, Robert Schierwagen, Sabine Klein, Christian P Strassburg, Ulrich Spengler, Jonel Trebicka
MircoRNA's (miR) have been recognised as important modulators of gene expression and potential biomarkers. However, they have been rarely investigated in bio fluids apart from blood. We investigated the association of miR-125b and miR-155 with complications of cirrhosis. Ascites was prospectively collected from patients with cirrhosis undergoing paracentesis at our department. miR's were determined in the supernatant using qPCR and normalized by SV-40. Clinical parameters were assessed at paracentesis and during follow-up...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070047/-clinical-analysis-for-patients-with-continuous-ambulatory-peritoneal-dialysis-associated-peritonitis
#6
Jian Liu, Xun Huang, Yao Liu, Hui Xu, Rui'e Gong, Chunhui Li
To analyze the clinical characteristics of continuous ambulatory peritoneal dialysis (CAPD) associated peritonitis in the tertiary hospitals and to discuss the preventive and therapeutic strategy.
 Methods: The clinical characteristics, pathogens, resistance and outcomes of 126 CAPD associated peritonitis in 104 patients from Jan, 2013 to June, 2016, were retrospectively analyzed.
 Results: Among the patients, the incidence rates of abdominal pain, fever, diarrhea and emesis were 104 (82.54%), 56 (44.44%), 49 (38...
December 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28068928/newly-recognized-cerebral-infarctions-on-postmortem-imaging-a-report-of-three-cases-with-systemic-infectious-disease
#7
Sakon Noriki, Kazuyuki Kinoshita, Kunihiro Inai, Toyohiko Sakai, Hirohiko Kimura, Takahiro Yamauchi, Masayuki Iwano, Hironobu Naiki
BACKGROUND: Postmortem imaging (PMI) refers to the imaging of cadavers by computed tomography (CT) and/or magnetic resonance imaging (MRI). Three cases of cerebral infarctions that were not found during life but were newly recognized on PMI and were associated with severe systemic infections are presented. CASE PRESENTATIONS: An 81-year-old woman with a pacemaker and slightly impaired liver function presented with fever. Imaging suggested interstitial pneumonia and an iliopsoas abscess, and blood tests showed liver dysfunction and disseminated intravascular coagulation (DIC)...
January 10, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28065837/vagal-regulation-of-group-3-innate-lymphoid-cells-and-the-immunoresolvent-pctr1-controls-infection-resolution
#8
Jesmond Dalli, Romain A Colas, Hildur Arnardottir, Charles N Serhan
Uncovering mechanisms that control immune responses in the resolution of bacterial infections is critical for the development of new therapeutic strategies that resolve infectious inflammation without unwanted side effects. We found that disruption of the vagal system in mice delayed resolution of Escherichia coli infection. Dissection of the right vagus decreased peritoneal group 3 innate lymphoid cell (ILC3) numbers and altered peritoneal macrophage responses. Vagotomy resulted in an inflammatory peritoneal lipid mediator profile characterized by reduced concentrations of pro-resolving mediators, including the protective immunoresolvent PCTR1, along with elevated inflammation-initiating eicosanoids...
January 17, 2017: Immunity
https://www.readbyqxmd.com/read/28065517/peritoneal-macrophage-heterogeneity-is-associated-with-different-peritoneal-dialysis-outcomes
#9
Chia-Te Liao, Robert Andrews, Leah E Wallace, Mohd Wajid A Khan, Ann Kift-Morgan, Nicholas Topley, Donald J Fraser, Philip R Taylor
Peritonitis remains the major obstacle for the maintenance of long-term peritoneal dialysis and dysregulated host peritoneal immune responses may compromise local anti-infectious defense, leading to treatment failure. Whilst, tissue mononuclear phagocytes, comprising macrophages and dendritic cells, are central to a host response to pathogens and the development of adaptive immune responses, they are poorly characterized in the human peritoneum. Combining flow cytometry with global transcriptome analysis, the phenotypic features and lineage identity of the major CD14(+) macrophage and CD1c(+) dendritic cell subsets in dialysis effluent were defined...
January 5, 2017: Kidney International
https://www.readbyqxmd.com/read/28061952/anti-mycobacterial-function-of-macrophages-is-impaired-in-a-diet-induced-model-of-type-2-diabetes
#10
Md Abdul Alim, Suchandan Sikder, Tahnee L Bridson, Catherine M Rush, Brenda L Govan, Natkunam Ketheesan
Type 2 diabetes (T2D) is one of the major risk factors for tuberculosis (TB). In this study, a diet induced murine model of T2D (DIMT2D) was developed and characterized in the context of metabolic, biochemical and histopathological features following diet intervention. Mycobacterial susceptibility was investigated using Mycobacterium fortuitum as a surrogate. Phagocytic capability of alveolar macrophages and resident peritoneal macrophages were determined by in vitro assays using mycolic acid coated beads and M...
January 2017: Tuberculosis
https://www.readbyqxmd.com/read/28053238/steroid-receptor-coactivator-3-contributes-to-host-defense-against-enteric-bacteria-by-recruiting-neutrophils-via-upregulation-of-cxcl2-expression
#11
Wenbo Chen, Xuqiang Lu, Yuan Chen, Ming Li, Pingli Mo, Zhangwei Tong, Wei Wang, Wei Wan, Guoqiang Su, Jianming Xu, Chundong Yu
Steroid receptor coactivator 3 (SRC-3) is a transcriptional coactivator that interacts with nuclear receptors and some other transcription factors to enhance their effects on target gene transcription. We reported previously that SRC-3-deficient (SRC-3(-/-)) mice are extremely susceptible to Escherichia coli-induced septic peritonitis as a result of uncontrolled inflammation and a defect in bacterial clearance. In this study, we observed significant upregulation of SRC-3 in colonic epithelial cells in response to Citrobacter rodentium infection...
January 4, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28046064/high-levels-of-soluble-c5b-9-complex-in-dialysis-fluid-may-predict-poor-prognosis-in-peritonitis-in-peritoneal-dialysis-patients
#12
Masashi Mizuno, Yasuhiro Suzuki, Keiko Higashide, Yumi Sei, Daiki Iguchi, Fumiko Sakata, Masanobu Horie, Shoichi Maruyama, Seiichi Matsuo, B Paul Morgan, Yasuhiko Ito
BACKGROUND: We searched for indicators to predict the prognosis of infectious peritonitis by measuring levels of complement proteins and activation products in peritoneal dialysis (PD) fluid (PDF) of patients at early stages of peritonitis. We retrospectively analyzed the relationship between the levels of sC5b-9, C3 and C4 in PDF and the subsequent clinical prognosis. METHODS: We measured levels of sC5b-9, C3 and C4 in PDF on days 1, 2 and 5 post-onset of peritonitis in 104 episodes of infectious peritonitis in PD patients from 2008 and retrospectively compared levels with clinical outcomes...
2017: PloS One
https://www.readbyqxmd.com/read/28031338/deletion-of-nlrp3-augments-survival-during-polymicrobial-sepsis-by-decreasing-autophagy-and-enhancing-phagocytosis
#13
Liliang Jin, Sanjay Batra, Samithamby Jeyaseelan
NLRP3 inflammasome is a critical player in innate immunity. Neutrophil recruitment to tissues and effective neutrophil function are critical innate immune mechanisms for bacterial clearance. However, the role of NLRP3 in neutrophil-dependent bacterial clearance in polymicrobial sepsis is unclear. In this study, we evaluated the role of NLRP3 in polymicrobial sepsis induced by cecal ligation and puncture (CLP). Our results showed protection from death in NLRP3-deficient (Nlrp3(-/-)) and NLRP3 inhibitor-treated wild-type (C57BL/6) mice...
December 28, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28028754/alteration-of-lysophosphatidylcholine-related-metabolic-parameters-in-the-plasma-of-mice-with-experimental-sepsis
#14
Won-Gyun Ahn, Jun-Sub Jung, Hyeok Yil Kwon, Dong-Keun Song
Plasma concentration of lysophosphatidylcholine (LPC) was reported to decrease in patients with sepsis. However, the mechanisms of sepsis-induced decrease in plasma LPC levels are not currently well known. In mice subjected to cecal ligation and puncture (CLP), a model of polymicrobial peritoneal sepsis, we examined alterations in LPC-related metabolic parameters in plasma, i.e., the plasma concentration of LPC-related substances (i.e., phosphatidylcholine (PC) and lysophosphatidic acid (LPA)), and activities or levels in the plasma of some enzymes that can be involved in the regulation of plasma LPC concentration (i...
December 28, 2016: Inflammation
https://www.readbyqxmd.com/read/28018948/data-on-the-nadph-oxidase-activity-induced-by-wkymvm-and-galectin-3-in-bone-marrow-derived-and-exudated-neutrophils-isolated-from-four-different-mouse-strains
#15
Lena Björkman, Huamei Forsman, Karin Önnheim
Neutrophils are the key players in inflammatory reactions and the release of superoxide through the NADPH-oxidase upon neutrophil activation contributes to bacterial clearance and surrounding tissue damage. Here we describe data on the mouse neutrophil NADPH-oxidase activation induced by the mouse formyl peptide receptor (Fpr) agonist WKYMVm and galectin-3. Neutrophils isolated from bone marrow, peritoneal exudated, and in vitro TNFα primed bone marrow neutrophils from four different laboratory strains (C57BL/6, DBA/1, BALB/c and NMRI) were used...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/28012568/improved-survival-after-induction-of-sepsis-by-cecal-slurry-in-pd-1-knockout-murine-neonates
#16
Whitney A Young, Eleanor A Fallon, Daithi S Heffernan, Philip A Efron, William G Cioffi, Alfred Ayala
BACKGROUND: Sepsis and the ensuing immune dysfunction continue to be major contributors to neonatal morbidity and mortality. Neonatal sepsis also is associated with profound immune dysfunction. We have recently identified a role for a family of coinhibitory molecules that are altered in murine sepsis and in critically ill adult patients, which may be a target for development of novel therapies. There is, however, a paucity of data pertaining to the role of coinhibitory checkpoint proteins in the control and modulation of neonatal sepsis...
December 21, 2016: Surgery
https://www.readbyqxmd.com/read/28003439/prolonged-exposure-to-volatile-anesthetic-isoflurane-worsens-the-outcome-of-polymicrobial-abdominal-sepsis
#17
Sophia Koutsogiannaki, Matthew M Schaefers, Toshiaki Okuno, Mai Ohba, Takehiko Yokomizo, Gregory P Priebe, James A DiNardo, Soriano G Sulpicio, Koichi Yuki
Sepsis continues to result in high morbidity and mortality. General anesthesia is often administered to septic patients, but the impacts of general anesthesia on host defense are not well understood. General anesthesia can be given by volatile and intravenous anesthetics. Our previous in vitro study showed that volatile anesthetic isoflurane directly inhibits leukocyte function-associated antigen-1 (LFA-1) and macrophage-1 antigen (Mac-1), critical adhesion molecules on leukocytes. Thus, the role of isoflurane exposure on in vivo LFA-1 and Mac-1 function was examined using polymicrobial abdominal sepsis model in mice...
December 20, 2016: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/27997972/changes-in-the-microbiome-in-cirrhosis-and-relationship-to-complications-hepatic-encephalopathy-spontaneous-bacterial-peritonitis-and-sepsis
#18
Jatinder Lachar, Jasmohan S Bajaj
Chronic liver disease with progression to decompensated cirrhosis and its associated complications, including hepatic encephalopathy, spontaneous bacterial peritonitis, and sepsis, is a leading cause of mortality and morbidity. The pathophysiology of decompensated cirrhosis, which is being intensively studied, leads to the development of gut microbiome changes causing dysbiosis. This is likely related to altered bile acid composition, with a subsequent increase in the relative abundance of potentially pathogenic bacteria that contributes to hepatic encephalopathy and leads to their translocation and the development of spontaneous bacterial peritonitis and bacteremia...
September 2016: Seminars in Liver Disease
https://www.readbyqxmd.com/read/27980220/berberine-augments-atp-induced-inflammasome-activation-in-macrophages-by-enhancing-ampk-signaling
#19
Chen-Guang Li, Liang Yan, Yan-Yun Jing, Li-Hui Xu, Yi-Dan Liang, Hong-Xia Wei, Bo Hu, Hao Pan, Qing-Bing Zha, Dong-Yun Ouyang, Xian-Hui He
The isoquinoline alkaloid berberine possesses many pharmacological activities including antibacterial infection. Although the direct bactericidal effect of berberine has been documented, its influence on the antibacterial functions of macrophages is largely unknown. As inflammasome activation in macrophages is important for the defense against bacterial infection, we aimed to investigate the influence of berberine on inflammasome activation in murine macrophages. Our results showed that berberine significantly increased ATP-induced inflammasome activation as reflected by enhanced pyroptosis as well as increased release of caspase-1p10 and mature interleukin-1β (IL-1β) in macrophages...
December 12, 2016: Oncotarget
https://www.readbyqxmd.com/read/27965385/hmgb1-induces-neutrophil-dysfunction-in-experimental-sepsis-and-in-patients-who-survive-septic-shock
#20
Murielle Grégoire, Jean-Marc Tadié, Fabrice Uhel, Arnaud Gacouin, Caroline Piau, Nathaniel Bone, Yves Le Tulzo, Edward Abraham, Karin Tarte, Jaroslaw W Zmijewski
Sepsis is accompanied by the initial activation of proinflammatory pathways and long-lasting immunosuppression that appears to contribute to late-occurring mortality. Although high-mobility group box 1 (HMGB1) is involved in many aspects of inflammation, its role in sepsis-induced immune suppression remains unclear. In this study, we examined HMGB1's contribution to neutrophil NADPH oxidase activity dysfunction and associated neutrophil-dependent bacterial clearance in mice subjected to sepsis and in patients who survive septic shock...
December 13, 2016: Journal of Leukocyte Biology
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