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https://www.readbyqxmd.com/read/28813662/a-liver-capsular-network-of-monocyte-derived-macrophages-restricts-hepatic-dissemination-of-intraperitoneal-bacteria-by-neutrophil-recruitment
#1
Frederic Sierro, Maximilien Evrard, Simone Rizzetto, Michelle Melino, Andrew J Mitchell, Manuela Florido, Lynette Beattie, Shaun B Walters, Szun Szun Tay, Bo Lu, Lauren E Holz, Ben Roediger, Yik Chun Wong, Alessandra Warren, William Ritchie, Claire McGuffog, Wolfgang Weninger, David G Le Couteur, Florent Ginhoux, Warwick J Britton, William R Heath, Bernadette M Saunders, Geoffrey W McCaughan, Fabio Luciani, Kelli P A MacDonald, Lai Guan Ng, David G Bowen, Patrick Bertolino
The liver is positioned at the interface between two routes traversed by pathogens in disseminating infection. Whereas blood-borne pathogens are efficiently cleared in hepatic sinusoids by Kupffer cells (KCs), it is unknown how the liver prevents dissemination of peritoneal pathogens accessing its outer membrane. We report here that the hepatic capsule harbors a contiguous cellular network of liver-resident macrophages phenotypically distinct from KCs. These liver capsular macrophages (LCMs) were replenished in the steady state from blood monocytes, unlike KCs that are embryonically derived and self-renewing...
August 15, 2017: Immunity
https://www.readbyqxmd.com/read/28812000/diagnostic-imaging-features-of-necrotizing-enterocolitis-a-narrative-review
#2
REVIEW
Francesco Esposito, Rosanna Mamone, Marco Di Serafino, Carmela Mercogliano, Valerio Vitale, Gianfranco Vallone, Patrizia Oresta
Necrotizing enterocolitis (NEC) is an inflammatory process, characterized by intestinal necrosis of variable extension, leading to perforation, generalized peritonitis and death. The classical pathogenetic theory focuses on mucosal damage related to a stress induced intestinal ischemia leading to mucosal injury and bacterial colonization of the wall. A more recent hypothesis emphasizes the role of immaturity of gastrointestinal and immune system, particularly of the premature, responsible of bowel wall vulnerability and suffering...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28810312/-analysis-of-infection-and-drug-resistance-in-6-107-cases-of-extrapulmonary-tuberculosis-in-chengdu-area
#3
D M Wang, Q F Li, M Zhu, Y H Xu, J Luo, Y J Li, J Zhong, Z J Wu
Objective: To analyze the infection and drug resistance of extrapulmonary tuberculosis, in order to provide useful references for prevention and treatment of tuberculosis (TB). Methods: A total of 6 107 suspected cases of extrapulmonary tuberculosis, including lymph node, pleural, peritoneal, meningeal, urinary tract, and bone tuberculosis, were collected retrospectively from January 2013 to December 2015 in Public Health Clinical Center of Chengdu. There were 4 033 male and 2 074 female patients, and the average age was 37 years...
August 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28804558/nadph-oxidase-2-inhibitor-diphenyleneiodonium-enhances-ros-independent-bacterial-phagocytosis-in-murine-macrophages-via-activation-of-the-calcium-mediated-p38-mapk-signaling-pathway
#4
Yuanfeng Zhu, Shijun Fan, Ning Wang, Xiaoli Chen, Yongjun Yang, Yongling Lu, Qian Chen, Jiang Zheng, Xin Liu
Activation of NADPH oxidase 2 (NOX2) triggers reactive oxygen species (ROS) generation, both of which are essential for robust microbial clearance by phagocytes. However, it is unknown whether inhibition of NOX2 activation or ROS generation affects cellular phagocytosis. Here, we found that the classic NOX2 inhibitor diphenyleneiodonium (DPI) induced uptake of E. coli by murine peritoneal macrophages through enhancing phagocytosis, and this effect was temperature-sensitive and attenuated by cytochalasin D as well as chemical inhibition of Syk and PLCγ, two downstream kinases involved in actin polymerization during phagocytosis...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28802151/sodium-butyrate-inhibits-the-nf-kappa-b-signaling-pathway-and-histone-deacetylation-and-attenuates-experimental-colitis-in-an-il-10-independent-manner
#5
Changhyun Lee, Byeong Gwan Kim, Jee Hyun Kim, Jaeyoung Chun, Jong Pil Im, Joo Sung Kim
Butyrate is a bacterial metabolite of dietary fiber in the colon that has been used to treat inflammatory disease. However, the effect of oral supplementation with butyrate on colitis has not been fully explored. We evaluated the effects of and mechanisms underlying oral supplementation with butyrate on experimental murine colitis. In an in vitro study, we found that LPS induced the secretion of cytokines (i.e., IL-8 in COLO 205; TNF-α, IL-6, IL-12, and IL-10 in RAW 264.7; and TNF-α, IL-6 and IL-12 in peritoneal macrophages obtained from IL-10-deficient [IL-10(-/-)] mice)...
August 9, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28798159/as-cath1-6-novel-cathelicidins-with-potent-antimicrobial-and-immunomodulatory-properties-from-alligator-sinensis-play-pivotal-roles-in-host-antimicrobial-immune-responses
#6
Yan Chen, Shasha Cai, Xue Qiao, Mali Wu, Zhilai Guo, Renping Wang, Yi-Qun Kuang, Haining Yu, Yipeng Wang
Crocodilians are regarded as possessing a powerful immune system. However, the composition and action of the crocodilian immune system have remained unclear until now. Cathelicidins, the principal family of host defense peptides, play pivotal roles in vertebrate immune defense against microbial invasions. However, cathelicidins from crocodilians have not been extensively studied to date. In the present study, six novel cathelicidins (As-CATH1-6) were identified and characterized from the endangered Chinese alligator (Alligator sinensis)...
August 10, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28797944/siderophore-mediated-iron-removal-from-chrysotile-implications-for-asbestos-toxicity-reduction-and-bioremediation
#7
Sanjay K Mohanty, Cedric Gonneau, Ashkan Salamatipour, Ralph A Pietrofesa, Brenda Casper, Melpo Christofidou-Solomidou, Jane K Willenbring
Asbestos fibers are highly toxic (Group 1 carcinogen) due to their high aspect ratio, durability, and the presence of iron. In nature, plants, fungi, and microorganisms release exudates, which can alter the physical and chemical properties of soil minerals including asbestos minerals. We examined whether exudates from bacteria and fungi at environmentally relevant concentrations can alter chrysotile, the most widely used asbestos mineral, and lower its toxicity. We monitored the release of iron from chrysotile in the presence of organic acid ligands and iron-specific siderophores derived from bacteria and fungi and measured any change in fiber toxicity toward peritoneal macrophages harvested from mice...
July 22, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28796076/factors-affecting-mortality-and-resource-use-for-hospitalized-patients-with-cirrhosis-a-population-based-study
#8
Phunchai Charatcharoenwitthaya, Ngamphol Soonthornworasiri, Khemajira Karaketklang, Kittiyod Poovorawan, Wirichada Pan-Ngum, Watcharasak Chotiyaputta, Tawesak Tanwandee, Kamthorn Phaosawasdi
Hospitalizations for advanced liver disease are costly and associated with significant mortality. This population-based study aimed to evaluate factors associated with in-hospital mortality and resource use for the management of hospitalized patients with cirrhosis.Mortality records and resource utilization for 52,027 patients hospitalized with cirrhosis and/or complications of portal hypertension (ascites, hepatic encephalopathy, variceal bleeding, spontaneous bacterial peritonitis, or hepatorenal syndrome) were extracted from a nationally representative sample of Thai inpatients covered by Universal Coverage Scheme during 2009 to 2013...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28792999/clinical-features-of-refractory-ascites-in-outpatients
#9
Wanda Regina Caly, Rodrigo Martins Abreu, Bernardo Bitelman, Flair José Carrilho, Suzane Kioko Ono
OBJECTIVES: To present the clinical features and outcomes of outpatients who suffer from refractory ascites. METHODS: This prospective observational study consecutively enrolled patients with cirrhotic ascites who submitted to a clinical evaluation, a sodium restriction diet, biochemical blood tests, 24 hour urine tests and an ascitic fluid analysis. All patients received a multidisciplinary evaluation and diuretic treatment. Patients who did not respond to the diuretic treatment were controlled by therapeutic serial paracentesis, and a transjugular intrahepatic portosystemic shunt was indicated for patients who required therapeutic serial paracentesis up to twice a month...
July 2017: Clinics
https://www.readbyqxmd.com/read/28768659/elucidating-the-role-of-leptin-in-systemic-inflammation-a-study-targeting-physiological-leptin-levels-in-rats-and-their-macrophages
#10
Elizabeth A Flatow, Evilin N Komegae, Monique T Fonseca, Camila F Brito, Florin M Musteata, Jose Antunes-Rodrigues, Alexandre A Steiner
To elucidate the role of leptin in acute systemic inflammation, we investigated how its infusion at low, physiologically relevant doses affects the responses to bacterial lipopolysaccharide (LPS) in rats subjected to 24 h of food deprivation. Leptin was infused subcutaneously (0-20 μg/kg/h) or intracerebroventricularly (0-1 μg/kg/h). Using hypothermia and hypotension as biomarkers of systemic inflammation, we identified the phase extending from 90 to 240 min post-LPS as the most susceptible to modulation by leptin...
August 2, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28764217/performance-of-disease-specific-scoring-models-in-intensive-care-patients-with-severe-liver-diseases
#11
Maged T El-Ghannam, Moataz H Hassanien, Mohamed D El-Talkawy, Abdel Aziz A Saleem, Amal I Sabry, Hoda M Abu Taleb
INTRODUCTION: Egypt has the highest prevalence of Hepatitis C Virus (HCV) in the world, estimated nationally at 14.7%. HCV treatment consumes 20% ($80 million) of Egypt's annual health budget. Outcomes of cirrhotic patients admitted to the ICU may, in fact, largely depend on differences in the state of the disease, criteria and indications for admission, resource utilization, and intensity of treatment. AIM: The aim of the present study was to evaluate the efficacy of liver specific scoring models in predicting the outcome of critically ill cirrhotic patients in the ICU as it may help in prioritization of high risk patients and preservation of ICU resources...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28763340/rifaximin-for-the-prevention-of-spontaneous-bacterial-peritonitis-and-hepatorenal-syndrome-in-cirrhosis-a-systematic-review-and-meta-analysis
#12
Faisal Kamal, Muhammad Ali Khan, Zubair Khan, George Cholankeril, Tariq A Hammad, Wade M Lee, Aijaz Ahmed, Bradford Waters, Colin W Howden, Satheesh Nair, Sanjaya K Satapathy
Prophylactic antibiotics have been recommended in patients with a previous history of spontaneous bacterial peritonitis (SBP). Recently, there has been interest in the use of rifaximin for the prevention of SBP and hepatorenal syndrome (HRS). We conducted a meta-analysis to evaluate this association of rifaximin. We searched several databases from inception through 24 January 2017, to identify comparative studies evaluating the effect of rifaximin on the occurrence of SBP and HRS. We performed predetermined subgroup analyses based on the type of control group, design of the study, and type of prophylaxis...
July 31, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28757012/longitudinal-study-of-transmission-of-escherichia-coli-from-broiler-breeders-to-broilers
#13
Louise Ladefoged Poulsen, Ida Thøfner, Magne Bisgaard, Jens Peter Christensen, Rikke Heidemann Olsen, Henrik Christensen
Escherichia coli is of major importance in industrial broiler production as the main cause of salpingitis and peritonitis in broiler breeders. Furthermore E. coli is the most common cause of first week mortality in broiler chickens. The aim of the present study was to investigate the transmission of E. coli, isolated from broiler breeders with salpingitis, to the progeny and the possibility of subsequent first week mortality. Four parent flocks were followed during the whole production period (20-60 weeks) by post mortem and bacteriological examination of randomly selected dead birds...
August 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28752106/in-vivo-analysis-of-neutrophil-infiltration-during-lps-induced-peritonitis
#14
Lucia de Almeida, Andrea Dorfleutner, Christian Stehlik
Bacterial lipopolysaccharide (LPS) is present in the outer membrane of Gram-negative bacteria and functions as pathogen-associated molecular pattern (PAMP) (Whitfield and Trent, 2014). LPS therefore is a potent activator of inflammatory responses leading to cytokine release and neutrophils recruitment. The lipid A moiety of LPS activates the complex consisting of the LPS binding protein (LBP), CD14, MD-2 and Toll-like receptor 4 (TLR4) and the non-canonical inflammasome-linked caspases-4, 5 and 11, which in turn activate the canonical NLRP3 inflammasome (Shi et al...
October 5, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28751655/corrigendum-nosocomial-and-community-acquired-spontaneous-bacterial-peritonitis-in-patients-with-liver-cirrhosis-in-china-comparative-microbiology-and-therapeutic-implications
#15
Lei Shi, Dan Wu, Lei Wei, Suxia Liu, Peng Zhao, Bo Tu, Yangxin Xie, Yanan Liu, Xinhua Wang, Liying Liu, Xin Zhang, Zhe Xu, Fusheng Wang, Enqiang Qin
This corrects the article DOI: 10.1038/srep46025.
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28750089/a-synthetic-cationic-antimicrobial-peptide-inhibits-inflammatory-response-and-the-nlrp3-inflammasome-by-neutralizing-lps-and-atp
#16
Lan-Hui Li, Tz-Chuen Ju, Chih-Yu Hsieh, Wei-Chih Dong, Wan-Tze Chen, Kuo-Feng Hua, Wei-Jung Chen
Antimicrobial peptides (AMPs) are one of the most important defense mechanisms against bacterial infections in insects, plants, non-mammalian vertebrates, and mammals. In the present study, a class of synthetic AMPs was evaluated for anti-inflammatory activity. One cationic AMP, GW-A2, demonstrated the ability to inhibit the expression levels of nitric oxide (NO), inducible NO synthase (iNOS), cyclooxygenase-2 (COX-2), tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) in lipopolysaccharide (LPS)-activated macrophages...
2017: PloS One
https://www.readbyqxmd.com/read/28740354/nosocomial-spontaneous-bacterial-peritonitis-antibiotic-treatment-in-the-era-of-multi-drug-resistance-pathogens-a-systematic-review
#17
Marco Fiore, Alberto Enrico Maraolo, Ivan Gentile, Guglielmo Borgia, Sebastiano Leone, Pasquale Sansone, Maria Beatrice Passavanti, Caterina Aurilio, Maria Caterina Pace
AIM: To systematically review literature upon aetiology of nosocomial spontaneous bacterial peritonitis (N-SBP) given the rising importance of multidrug-resistant (MDR) bacteria. METHODS: A literature search was performed on MEDLINE and Google Scholar databases from 2000 to 15(th) of November 2016, using the following search strategy: "spontaneous" AND "peritonitis". RESULTS: The initial search through electronic databases retrieved 2556 records...
July 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28737869/management-of-cirrhotic-ascites-in-children-review-and-recommendations-part-1-pathophysiology-diagnostic-evaluation-hospitalization-criteria-treatment-nutritional-management
#18
REVIEW
David F Bes, M Cristina Fernández, Ivone Malla, Horacio A Repetto, Daniel Buamsch, Susana López, Roxana Martinitto, Miriam Cuarterolo, Fernando Álvarez
Ascites is a major complication of cirrhosis. There are several evidence-based articles and guidelines for the management of adults, but few data have been published in relation to children. In the case of pediatric patients with cirrhotic ascites (PPCA), the following questions are raised: How are the clinical assessment and ancillary tests performed? When is ascites considered refractory? How is it treated? Should fresh plasma and platelets be infused before abdominal paracentesis to prevent bleeding? What are the hospitalization criteria? What are the indicated treatments? What complications can patients develop? When and how should hyponatremia be treated? What are the diagnostic criteria for spontaneous bacterial peritonitis? How is it treated? What is hepatorenal syndrome? How is it treated? When should albumin be infused? When should fluid intake be restricted? The recommendations made here are based on pathophysiology and suggest the preferred approach to its diagnostic and therapeutic aspects, and preventive care...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28736159/a-novel-ccr-2-tlr-2-triggered-signaling-in-murine-peritoneal-macrophages-intensifies-bacterial-staphylococcus-aureus-killing-by-reactive-oxygen-species-through-tnf-r1
#19
Ajeya Nandi, Biswadev Bishayi
Macrophages are remarkably versatile in their ability to recognize and respond to a wide range of stimuli by expressing a variety of surface and intracellular receptors and triggering multiple signal transduction pathways. The onset of microbial infection is primarily determined by the initial contacts made by the microbes with the host macrophages. Although there prevail a relationship between the chemokine receptor and Toll like receptors during disease, particularly TLR-2 and CCR-2 signaling interdependence on each other has not been yet investigated during acute staphylococcal infection...
July 20, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28726635/as-cath1-6-novel-cathelicidins-with-potent-antimicrobial-and-immunomodulatory-properties-from-alligator-sinensis-play-pivotal-roles-in-host-anti-microbial-immune-responses
#20
Yan Chen, Shasha Cai, Xue Qiao, Mali Wu, Zhilai Guo, Renping Wang, Yi-Qun Kuang, Haining Yu, Yipeng Wang
Crocodilians are regarded as possessing a powerful immune system. However, the composition and action of crocodilian immune system has remained unclear until now. Cathelicidins, the principal family of host defense peptides, play pivotal roles in vertebrate immune defense against microbial invasions. However, cathelicidins from crocodilians have not been extensively studied to date. In the present study, six novel cathelicidins (As-CATH1~6) were identified and characterized from the endangered Chinese Alligator ( Alligator sinensis )...
July 18, 2017: Biochemical Journal
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