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Neutrophil activation

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https://www.readbyqxmd.com/read/28101752/the-impact-of-hydrocortisone-treatment-on-neutrophil-gelatinase-associated-lipocalin-release-in-porcine-endotoxemic-shock
#1
E Söderberg, M Eriksson, A Larsson, M Lipcsey
BACKGROUND: A key feature of sepsis is systemic inflammatory activation that could be counteracted by steroids. In this experimental model of systemic inflammation, we sought to investigate whether septic neutrophil activation, evaluated by the plasma levels of neutrophil gelatinase-associated protein (NGAL), is modulated by the timing of hydrocortisone treatment. METHODS: Sixteen anesthetized pigs were allocated to one of four equally sized groups. Three of these groups received endotoxin at 2 μg × kg(-1) × h(-1) for 6 h so as to induce endotoxemic shock...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28101464/anti-inflammatory-and-antibothropic-properties-of-jatropha-elliptica-a-plant-from-brazilian-cerrado-biome
#2
Sára Cósta Ferreira-Rodrigues, Cássio Milhomens Rodrigues, Marcio Galdino Dos Santos, Jean Antonio Abraham Gautuz, Magali Glauzer Silva, José Carlos Cogo, Camila Batista-Silva, Cleiton Pita Dos Santos, Francisco Carlos Groppo, Karina Cogo-Müller, Yoko Oshima-Franco
Purpose: The aim of this study was to evaluate the antibothropic and anti-inflammatory properties of J. elliptica.Methods: Phytochemical screening and thin-layer chromatography (TLC) assays were performed on J. elliptica hydroalcoholic extract (TE) in order to observe its main constituents. The antibothropic activity of TE was evaluated by the in vitro neuromuscular blockade caused by Bothrops jararacussu venom (Bjssu), in a mouse phrenic nerve-diaphragm model (PND). A quantitative histological study was carried out to observe a possible protection of TE against the venom myotoxicity...
December 2016: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28099597/correlation-between-the-histopathology-of-chronic-urticaria-and-its-clinical-picture
#3
Raquel Zappa Silva Marques, Roberta Fachini Jardim Criado, Carlos D'Apparecida Santos Machado, Juliana Milhomem Tamanini, Cristina van Blarcum de Graaff Mello, Carolina Speyer
BACKGROUND: Chronic urticaria is characterized by transient, pruritic lesions of varying sizes, with central pallor and well-defined edges, with disease duration longer than six weeks. Its cellular infiltrate consists of neutrophils, lymphocytes and eosinophils. There is a subgroup of patients with eosinophilic or neutrophilic urticaria, resistant to the treatment with antihistamines, but that respond to a combination of antihistamine with other drugs. OBJECTIVE: To evaluate the present infiltration in chronic urticaria biopsies and correlate it with the clinical disease activity and response to treatment...
November 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28099491/death-of-monocytes-through-oxidative-burst-of-macrophages-and-neutrophils-killing-in-trans
#4
Viviane Ponath, Bernd Kaina
Monocytes and their descendants, macrophages, play a key role in the defence against pathogens. They also contribute to the pathogenesis of inflammatory diseases. Therefore, a mechanism maintaining a balance in the monocyte/macrophage population must be postulated. Our previous studies have shown that monocytes are impaired in DNA repair, rendering them vulnerable to genotoxic stress while monocyte-derived macrophages are DNA repair competent and genotoxic stress-resistant. Based on these findings, we hypothesized that monocytes can be selectively killed by reactive oxygen species (ROS) produced by activated macrophages...
2017: PloS One
https://www.readbyqxmd.com/read/28099388/valproic-acid-mitigates-the-inflammatory-response-and-prevents-acute-respiratory-distress-syndrome-in-a-murine-model-of-escherichia-coli-pneumonia-at-the-expense-of-bacterial-clearance
#5
George Kasotakis, Manuel Galvan, Elizabeth King, Beda Sarkar, Arthur Stucchi, Joseph P Mizgerd, Peter A Burke, Daniel Remick
BACKGROUND: Histone deacetylase inhibitors (HDACI) are members of a family of epigenetic modifying agents with broad anti-inflammatory properties. These anti-inflammatory properties may have important therapeutic implications in Acute Respiratory Distress Syndrome (ARDS). However, administration of HDACI may create an immunosuppressive environment conducive to bacterial growth. Accordingly, the aim of the current study is to investigate the effect of HDACI Valproic Acid (VPA) on host inflammatory response and bacterial burden in a murine model of E...
January 18, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28098908/protective-effects-of-ethyl-pyruvate-on-lipopolysaccharide%C3%A2-induced-acute-lung-injury-through-inhibition-of-autophagy-in-neutrophils
#6
Qingteng Zhu, Hui Wang, Hairong Wang, Yong Luo, Yang Yu, Qirong Du, Aihua Fei, Shuming Pan
Among a number of clinical factors, bacterial infection is one of the most common causes of acute lung injury (ALI), a serious complication that carries a high risk of mortality (~40%). During the process of ALI, intense local and systemic inflammation is elicited, which exacerbates the injury. Neutrophil infiltration into airspace is observed in early stage of ALI, and is required for the full development of ALI through an array of mechanisms, including the release of granule contents and the production of pro‑inflammatory cytokines, due to the overactivation of complement and cytokines...
January 13, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28098182/nephro-toxic-effects-of-intraperitoneally-injected-egcg-in-diabetic-mice-involvement-of-oxidative-stress-inflammation-and-apoptosis
#7
Nora O Abdel Rasheed, Lamiaa A Ahmed, Dalaal M Abdallah, Bahia M El-Sayeh
Epigallocatechin gallate (EGCG) has been studied for its beneficial effects. However, some case reports have associated EGCG supplementation with hepato-toxicity. In the present study, we investigated the possible nephro-toxic effects of EGCG in diabetic mice. Streptozotocin (150 mg/kg, i.p.) was injected in mice for diabetes induction. EGCG (100 mg/kg/day, i.p.) was then given for 4 days. The administration of EGCG to diabetic mice caused 60% mortality with no death recorded in other groups. Blood samples were collected for estimation of serum cystatin C, neutrophil gelatinase-associated lipocalin and blood urea nitrogen...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098108/the-relationship-between-mean-platelet-volume-and-neutrophil-lymphocyte-ratio-with-inflammation-and-proteinuria-in-chronic-kidney-disease
#8
Gulay Yilmaz, Can Sevinc, Sedat Ustundag, Yasemin Coskun Yavuz, Tuba Hacıbekiroglu, Esra Hatipoglu, Mehmet Baysal
Atherosclerosis, which develops as a result of inflammation, is the most important cause of morbidity and mortality in chronic kidney disease (CKD). In this study, we investigated the relationship of mean platelet volume (MPV) and neutrophil/lymphocyte ratio (NLR) with inflammation and proteinuria in patients with CKD Stage 3-4. Healthy individuals who applied to nephrology clinic for checkup purposes acted as controls. Fifty-three patients and 30 healthy controls were included in the study. Patients with diabetes mellitus, active infection, malignancy, and coronary artery disease were excluded from the study...
January 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28097233/ectonucleotidase-cd39-driven-control-of-postinfarction-myocardial-repair-and-rupture
#9
Nadia R Sutton, Takanori Hayasaki, Matthew C Hyman, Anuli C Anyanwu, Hui Liao, Danica Petrovic-Djergovic, Linda Badri, Amy E Baek, Natalie Walker, Keigo Fukase, Yogendra Kanthi, Scott H Visovatti, Ellen L Horste, Jessica J Ray, Sascha N Goonewardena, David J Pinsky
Mechanical complications of myocardial infarction (MI) are often fatal. Little is known about endogenous factors that predispose to myocardial rupture after MI. Ectonucleoside triphosphate diphosphohydrolase (CD39) could be a critical mediator of propensity to myocardial rupture after MI due to its role in modulating inflammation and thrombosis. Using a model of permanent coronary artery ligation, rupture was virtually abrogated in cd39(-/-) mice versus cd39(+/+) controls, with elevated fibrin and collagen deposition and marked neutrophil and macrophage influx...
January 12, 2017: JCI Insight
https://www.readbyqxmd.com/read/28097204/genomics-implicates-adaptive-and-innate-immunity-in-alzheimer-s-and-parkinson-s-diseases
#10
Sarah A Gagliano, Jennie G Pouget, John Hardy, Jo Knight, Michael R Barnes, Mina Ryten, Michael E Weale
OBJECTIVES: We assessed the current genetic evidence for the involvement of various cell types and tissue types in the etiology of neurodegenerative diseases, especially in relation to the neuroinflammatory hypothesis of neurodegenerative diseases. METHODS: We obtained large-scale genome-wide association study (GWAS) summary statistics from Parkinson's disease (PD), Alzheimer's disease (AD), and amyotrophic lateral sclerosis (ALS). We used multiple sclerosis (MS), an autoimmune disease of the central nervous system, as a positive control...
December 2016: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28096963/effect-of-a-769662-a-direct-ampk-activator-on-tlr-4-expression-and-activity-in-mice-heart-tissue
#11
Maryam Rameshrad, Nasrin Maleki-Dizaji, Hamid Soraya, Negisa Seyed Toutounchi, Abolfazl Barzegari, Alireza Garjani
OBJECTIVES: TLR-4 activates a number of inflammatory signaling pathways. Also, AMPK could be involved in anti-inflammatory signaling. The aim of this study was to identify whether stimulation of AMPK could inhibit LPS-induced Tlr-4 gene expression in mice hearts. MATERIALS AND METHODS: Heart AMPK activity and/or Tlr-4 expression was stimulated in different mice groups, using respectively IP injection of A-769662 (10 mg/kg) and LPS (2 mg/kg) or a combination of both agents...
December 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28096923/role-of-neutrophil-to-lymphocyte-ratio-in-prediction-of-gleason-score-upgrading-and-disease-upstaging-in-low-risk-prostate-cancer-patients-eligible-for-active-surveillance
#12
Mehmet Ilker Gokce, Semih Tangal, Nurullah Hamidi, Evren Suer, Muhammed Arif Ibis, Yasar Beduk
INTRODUCTION: Active surveillance (AS) is an option for management of low-risk prostate cancer (PCa). However, grade and stage progression is an important consideration. Neutrophil-to-lymphocyte ratio (NLR) is a useful marker of cancer-related inflammation. In this study, we aimed to identify the roles of neutrophil count (NC), lymphocyte count (LC), and NLR to predict Gleason score (GS) upgrading, disease upstaging, and biochemical recurrence rates (BCR) in low-risk PCa patients. METHODS: We retrospectively evaluated data of 210 low-risk PCa patients eligible for AS, but who underwent radical prostatectomy...
November 2016: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28096658/anticancer-and-anti-inflammatory-activities-of-girinimbine-isolated-from-murraya-koenigii
#13
Venoos Iman, Syam Mohan, Siddig Ibrahim Abdelwahab, Hamed Karimian, Noraziah Nordin, Mehran Fadaeinasab, Mohamad Ibrahim Noordin, Suzita Mohd Noor
Therapy that directly targets apoptosis and/or inflammation could be highly effective for the treatment of cancer. Murraya koenigii is an edible herb that has been traditionally used for cancer treatment as well as inflammation. Here, we describe that girinimbine, a carbazole alkaloid isolated from M. koenigii, induced apoptosis and inhibited inflammation in vitro as well as in vivo. Induction of apoptosis in human colon cancer cells (HT-29) by girinimbine revealed decreased cell viability in HT-29, whereas there was no cytotoxic effect on normal colon cells...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28096329/tissue-dual-rna-seq-allows-fast-discovery-of-infection-specific-functions-and-riboregulators-shaping-host-pathogen-transcriptomes
#14
Aaron M Nuss, Michael Beckstette, Maria Pimenova, Carina Schmühl, Wiebke Opitz, Fabio Pisano, Ann Kathrin Heroven, Petra Dersch
Pathogenic bacteria need to rapidly adjust their virulence and fitness program to prevent eradication by the host. So far, underlying adaptation processes that drive pathogenesis have mostly been studied in vitro, neglecting the true complexity of host-induced stimuli acting on the invading pathogen. In this study, we developed an unbiased experimental approach that allows simultaneous monitoring of genome-wide infection-linked transcriptional alterations of the host and colonizing extracellular pathogens. Using this tool for Yersinia pseudotuberculosis-infected lymphatic tissues, we revealed numerous alterations of host transcripts associated with inflammatory and acute-phase responses, coagulative activities, and transition metal ion sequestration, highlighting that the immune response is dominated by infiltrating neutrophils and elicits a mixed TH17/TH1 response...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28096298/mfg-e8-derived-peptide-attenuates-adhesion-and-migration-of-immune-cells-to-endothelial-cells
#15
Yohei Hirano, Weng-Lang Yang, Monowar Aziz, Fangming Zhang, Barbara Sherry, Ping Wang
Milk fat globule-epidermal growth factor-factor 8 (MFG-E8) plays an immunomodulatory role in inflammatory diseases. MFG-E8-derived short peptide (MSP68) greatly reduces neutrophil infiltration and injury in the lung during sepsis. In this study, we examined the effect of MSP68 on chemotaxis of various immune cells and its regulatory mechanism. Bone marrow-derived neutrophils (BMDNs) from C57BL/6 mice, human monocyte THP-1 cell line, and human T lymphocyte Jurkat cell line were used for adhesion and migration assays using a Transwell method in the presence of MSP68...
January 17, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28096297/frontline-science-tumor-necrosis-factor-%C3%AE-stimulation-and-priming-of-human-neutrophil-granule-exocytosis
#16
Kenneth R McLeish, Michael L Merchant, T Michael Creed, Shweta Tandon, Michelle T Barati, Silvia M Uriarte, Richard A Ward
Neutrophil granule exocytosis plays an important role in innate and adaptive immune responses. The present study examined TNF-α stimulation or priming of exocytosis of the 4 neutrophil granule subsets. TNF-α stimulated exocytosis of secretory vesicles and gelatinase granules and primed specific and azurophilic granule exocytosis to fMLF stimulation. Both stimulation and priming of exocytosis by TNF-α were dependent on p38 MAPK activity. Bioinformatic analysis of 1115 neutrophil proteins identified by mass spectrometry as being phosphorylated by TNF-α exposure found that actin cytoskeleton regulation was a major biologic function...
January 17, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28095485/bordetella-parapertussis-circumvents-neutrophil-extracellular-bactericidal-mechanisms
#17
Juan Gorgojo, Emilia Scharrig, Ricardo M Gómez, Eric T Harvill, Maria Eugenia Rodríguez
B. parapertussis is a whooping cough etiological agent with the ability to evade the immune response induced by pertussis vaccines. We previously demonstrated that in the absence of opsonic antibodies B. parapertussis hampers phagocytosis by neutrophils and macrophages and, when phagocytosed, blocks intracellular killing by interfering with phagolysosomal fusion. But neutrophils can kill and/or immobilize extracellular bacteria through non-phagocytic mechanisms such as degranulation and neutrophil extracellular traps (NETs)...
2017: PloS One
https://www.readbyqxmd.com/read/28092699/infection-of-human-intestinal-epithelial-cells-by-invasive-bacteria-activates-nf-%C3%AE%C2%BAb-and-increases-icam-1-expression-through-nod1
#18
Woon Geon Shin, Bum Joon Park, Sung Joong Lee, Jae Gyu Kim
Background/Aims: Nucleotide-binding oligomerization domain 1 (NOD1) is required for primary intestinal epithelial cells (IECs) to respond to natural mucopeptides secreted by gram-negative bacteria. Infection of human IECs with invasive bacteria up-regulates intercellular adhesion molecule-1 (ICAM-1) expression. However, the role of NOD family members in host defense has been largely unknown. The aim of this study was to determine whether there is a functional role for NOD1 in the up-regulation of ICAM-1 expression in invasive bacteria-infected IECs...
January 16, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28092664/expression-of-specific-inflammasome-gene-modules-stratifies-older-individuals-into-two-extreme-clinical-and-immunological-states
#19
David Furman, Junlei Chang, Lydia Lartigue, Christopher R Bolen, François Haddad, Brice Gaudilliere, Edward A Ganio, Gabriela K Fragiadakis, Matthew H Spitzer, Isabelle Douchet, Sophie Daburon, Jean-François Moreau, Garry P Nolan, Patrick Blanco, Julie Déchanet-Merville, Cornelia L Dekker, Vladimir Jojic, Calvin J Kuo, Mark M Davis, Benjamin Faustin
Low-grade, chronic inflammation has been associated with many diseases of aging, but the mechanisms responsible for producing this inflammation remain unclear. Inflammasomes can drive chronic inflammation in the context of an infectious disease or cellular stress, and they trigger the maturation of interleukin-1β (IL-1β). Here we find that the expression of specific inflammasome gene modules stratifies older individuals into two extremes: those with constitutive expression of IL-1β, nucleotide metabolism dysfunction, elevated oxidative stress, high rates of hypertension and arterial stiffness; and those without constitutive expression of IL-1β, who lack these characteristics...
January 16, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28092405/thrombin-contributes-to-protective-immunity-in-pneumonia-derived-sepsis-via-fibrin-polymerization-and-platelet-neutrophil-interactions
#20
Theodora A M Claushuis, Sacha F de Stoppelaar, Ingrid Stroo, Joris J T H Roelofs, Roelof Ottenhoff, Tom van der Poll, Cornelis van 't Veer
BACKGROUND: Innate immunity and coagulation are closely linked during sepsis. Their interaction can be detrimental for outcome due to microvascular failure but can also enhance host defense. The role of thrombin herein has not been fully elucidated. OBJECTIVE: We aimed to investigate the contribution of thrombin to the host response during pneumonia derived sepsis. METHODS: Mice treated with the specific thrombin inhibitor Dabigatran or control chow were infected with the common human sepsis pathogen Klebsiella (K...
January 16, 2017: Journal of Thrombosis and Haemostasis: JTH
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