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Neutrophil inflammation

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https://www.readbyqxmd.com/read/29782541/an-unappreciated-role-for-neutrophil-dc-hybrids-in-immunity-to-invasive-fungal-infections
#1
J Scott Fites, Michael Gui, John F Kernien, Paige Negoro, Zeina Dagher, David B Sykes, Jeniel E Nett, Michael K Mansour, Bruce S Klein
Neutrophils are classically defined as terminally differentiated, short-lived cells; however, neutrophils can be long-lived with phenotypic plasticity. During inflammation, a subset of neutrophils transdifferentiate into a population called neutrophil-DC hybrids (PMN-DCs) having properties of both neutrophils and dendritic cells. While these cells ubiquitously appear during inflammation, the role of PMN-DCs in disease remains poorly understood. We observed the differentiation of PMN-DCs in pre-clinical murine models of fungal infection: blastomycosis, aspergillosis and candidiasis...
May 21, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29781811/spleen-derived-classical-monocytes-mediate-lung-ischemia-reperfusion-injury-through-il-1%C3%AE
#2
Hsi-Min Hsiao, Ramiro Fernandez, Satona Tanaka, Wenjun Li, Jessica H Spahn, Stephen Chiu, Mahzad Akbarpour, Daniel Ruiz-Perez, Qiang Wu, Cem Turam, Davide Scozzi, Tsuyoshi Takahashi, Hannah P Luehmann, Varun Puri, G R Scott Budinger, Alexander S Krupnick, Alexander V Misharin, Kory J Lavine, Yongjian Liu, Andrew E Gelman, Ankit Bharat, Daniel Kreisel
Ischemia-reperfusion injury, a form of sterile inflammation, is the leading risk factor for both short-term mortality following pulmonary transplantation and chronic lung allograft dysfunction. While it is well recognized that neutrophils are critical mediators of acute lung injury, processes that guide their entry into pulmonary tissue are not well understood. Here, we found that CCR2+ classical monocytes are necessary and sufficient for mediating extravasation of neutrophils into pulmonary tissue during ischemia-reperfusion injury following hilar clamping or lung transplantation...
May 21, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29780806/myeloperoxidase-negatively-regulates-neutrophil-endothelial-cell-interactions-by-impairing-%C3%AE-m%C3%AE-2-integrin-function-in-sterile-inflammation
#3
Alan Tseng, Kyungho Kim, Jing Li, Jaehyung Cho
Interactions of neutrophils with endothelial cells (ECs) and platelets contribute to tissue damage and vascular occlusion under sterile inflammatory conditions. However, the molecular mechanisms regulating the cell-cell interactions remain poorly understood. Previous studies suggest that reactive oxygen species, such as hydrogen peroxide (H2 O2 ), produced from NADPH oxidase 2 play a critical role in platelet-neutrophil interactions by regulating the function of neutrophil αMβ2 integrin during sterile inflammation...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29780024/the-neutrophil-mobilizing-cytokine-interleukin-26-in-the-airways-of-long-term-tobacco-smokers
#4
Karlhans Fru Che, Ellen Tufvesson, Sara Tengvall, Elisa Lappi-Blanco, Riitta Kaarteenaho, Bettina Levänen, Marie Ekberg, Annelie Brauner, Åsa M Wheelock, Leif Bjermer, C Magnus Sköld, Anders Lindén
Long-term tobacco smokers with chronic obstructive pulmonary disease (COPD) or chronic bronchitis display an excessive accumulation of neutrophils in the airways; an inflammation that responds poorly to established therapy. Thus, there is a need to identify new molecular targets for the development of effective therapy. Here, we hypothesized that the neutrophil-mobilizing cytokine interleukin (IL)-26 (IL-26) is involved in airway inflammation amongst long-term tobacco smokers with or without COPD, chronic bronchitis or colonization by pathogenic bacteria...
May 23, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29778882/insight-into-the-interactions-of-proteinase-inhibitor-alpha-2-macroglobulin-with-hypochlorite-thermal-analysis-and-biophysical-approach
#5
Tooba Siddiqui, Mohammad Khalid Zia, Syed Saqib Ali, Haseeb Ahsan, Fahim Halim Khan
Hypochlorous acid, an active bleaching agent is one of the major oxidants produced by neutrophils under physiological conditions. It is a potent reactive oxygen species (ROS) which causes oxidation of biomolecules. Treatment of proteins with hypochlorite results in direct oxidative damage to proteins. Alpha-2-macroglobulin is a major proteinase inhibitor and it can inhibit proteinase of any kind regardless of specificity and catalytic mechanism. The proteinase-antiproteinase balance plays an important role in mediating inflammation associated tissue destruction...
May 17, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29778674/innate-effector-cells-in-angiogenesis-and-lymphangiogenesis
#6
REVIEW
Gilda Varricchi, Stefania Loffredo, Maria Rosaria Galdiero, Giancarlo Marone, Leonardo Cristinziano, Francescopaolo Granata, Gianni Marone
Angiogenesis and lymphangiogenesis are distinct and complex processes requiring a finely tuned balance between stimulatory and inhibitory signals. During adulthood, angiogenesis and lymphangiogenesis are activated at sites of tumor growth, tissue injury and remodeling, and chronic inflammation. Vascular endothelial growth factors (VEGFs), angiopoietin (ANGPTs) and a multitude of additional signaling molecules play distinct roles in the modulation of angiogenesis/lymphangiogenesis. VEGFs and ANGPTs activate specific tyrosine kinase receptor (e...
May 17, 2018: Current Opinion in Immunology
https://www.readbyqxmd.com/read/29778007/augmentation-of-the-expression-of-the-eotaxin-receptor-on-duodenal-neutrophils-by-il-21
#7
Yuji Takeda, Tomoyuki Kato, Nobuhito Nemoto, Akemi Araki, Mohammad Yeashin Gazi, Hidetoshi Nara, Hironobu Asao
Inflammation can occur via different mechanisms, such as via acute and chronic responses, on numerous occasions and function accordingly through various roles. There are more than five subsets of neutrophils; neutrophilic heterogeneity is modulated by the inflammatory condition. To understand the characteristics of inflammation, identification of atypical neutrophils is important. In this study, we found that the expression of eotaxin receptor (CD193) on atypical neutrophils in the duodenum is augmented in IL-21 isoform transgenic (Tg) mice...
May 16, 2018: Cytokine
https://www.readbyqxmd.com/read/29777682/inhibition-of-bet-bromodomains-restores-corticosteroid-responsiveness-in-a-mixed-granulocytic-mouse-model-of-asthma
#8
Ahmed Nadeem, Sheikh F Ahmad, Naif O Al-Harbi, Nahid Siddiqui, Khalid E Ibrahim, Sabry M Attia
Asthma is a heterogeneous disease characterized by different endotypes/phenotypes. Th2/Th17 driven mixed granulocytic asthma is one of them and shows resistance to corticosteroid therapy. Bromodomain and extra-terminal (BET) proteins are required for differentiation of Th17 cells which play a pivotal role in neutrophilic inflammation. Therefore, we sought to characterize the differential effects of BET inhibitor versus corticosteroids, and their potential synergism in cockroach allergen extract (CE)-induced mixed granulocytic (eosinophilic and neutrophilic) mouse model of asthma having Th2/Th17 endotype...
May 16, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29776451/myeloid-specific-tak1-deletion-results-in-reduced-brain-monocyte-infiltration-and-improved-outcomes-after-stroke
#9
Anjali Chauhan, Jacob Hudobenko, Abdullah Al Mamun, Edward C Koellhoffer, Anthony Patrizz, Rodney M Ritzel, Bhanu P Ganesh, Louise D McCullough
BACKGROUND: Activation of transforming growth factor-β-activated kinase 1 (TAK1) occurs after stroke and leads to an exacerbation of brain injury. TAK1 is involved in innate and adaptive immune responses, but it has divergent inflammatory effects that are dependent on the cell type in which it is activated. There is a robust infiltration of myeloid cells after stroke; however, the contribution of myeloid TAK1 to cerebral ischemia is currently unknown. We hypothesized that myeloid-specific deletion of TAK1 would protect against ischemic brain injury...
May 17, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29774108/prognostic-and-diagnostic-impact-of-fibrinogen-neutrophil-to-lymphocyte-ratio-and-platelet-to-lymphocyte-ratio-on-thymic-epithelial-tumors-outcome
#10
Stefan Janik, Thomas Raunegger, Philipp Hacker, Bahil Ghanim, Elisa Einwallner, Leonhard Müllauer, Ana-Iris Schiefer, Julia Moser, Walter Klepetko, Hendrik Jan Ankersmit, Bernhard Moser
Background: Peripheral blood-derived inflammation-based markers, such as Neutrophil-to-Lymphocyte Ratio (NLR), Platelet-to-Lymphocyte Ratio (PLR), and Fibrinogen have been identified as prognostic markers in various solid malignancies. Here we aimed to investigate the prognostic and diagnostic impact of NLR, PLR, and Fibrinogen in patients with thymic epithelial tumors (TETs). Results: Pretreatment Fibrinogen serum concentrations, NLRs and PLRs were highest in patients with TCs and advanced tumor stages...
April 24, 2018: Oncotarget
https://www.readbyqxmd.com/read/29772553/establishment-of-a-porcine-model-of-indomethacin-induced-intestinal-injury
#11
Dan Yi, Wenkai Liu, Yongqing Hou, Lei Wang, Di Zhao, Tao Wu, Binying Ding, Guoyao Wu
A useful animal model of intestinal injury is pivotal for studying its pathogenesis and developing nutritional interventions (e.g., amino acid supplementation). Here, we propose the use of indomethacin (IDMT) to induce intestinal inflammation in neonatal pigs. Fourteen-day-old piglets fed a milk replacer diet receive intraperitoneal administration of IDMT (5 mg/kg body weight) for 3 consecutive days. On day 4, blood and intestinal samples are obtained for physiological and biochemical analyses. IDMT increases blood DAO activity, I-FABP concentration, neutrophil and eosinophil numbers; intestinal MMP3 mRNA levels, MPO activity, and MDA concentration; but reduces the plasma concentration of citrulline (synthesized exclusively by enterocytes of the small intestine), intestinal GSH-Px activity, and mRNA levels for villin , I-FABP , TRPV6 , AQP10 , and KCNJ13 ...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/29772343/brain-stimulation-differentially-modulates-nociception-and-inflammation-in-aversive-and-non-aversive-behavioural-conditions
#12
G S Bassi, A Kanashiro, G J Rodrigues, F Q Cunha, N C Coimbra, L Ulloa
Inflammation and pain are major clinical burdens contributing to multiple disorders and limiting the quality of life of patients. We previously reported that brain electrical stimulation can attenuate joint inflammation in experimental arthritis. Here, we report that non-aversive electrical stimulation of the locus coeruleus (LC), the paraventricular hypothalamic nucleus (PVN) or the ventrolateral column of the periaqueductal grey matter (vlPAG) decreases thermal pain sensitivity, knee inflammation and synovial neutrophilic infiltration in ratswith intra-articular zymosan...
May 14, 2018: Neuroscience
https://www.readbyqxmd.com/read/29772063/cytokine-production-by-human-neutrophils-revisiting-the-dark-side-of-the-moon
#13
REVIEW
Nicola Tamassia, Francisco Bianchetto-Aguilera, Fabio Arruda-Silva, Elisa Gardiman, Sara Gasperini, Federica Calzetti, Marco A Cassatella
Polymorphonuclear neutrophils are the most numerous leukocytes present in human blood, and function as crucial players in innate immune responses. Neutrophils are indispensable for the defence towards microbes, as they effectively counter them by releasing toxic enzymes, by synthetizing reactive oxygen species and by producing inflammatory mediators. Interestingly, recent findings have highlighted an important role of neutrophils also as promoters of the resolution of inflammation process, indicating that their biological functions go well beyond simple pathogen killing...
May 17, 2018: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29772024/use-of-human-amniotic-epithelial-cells-in-mouse-models-of-bleomycin-induced-lung-fibrosis-a-systematic-review-and-meta-analysis
#14
Fang He, Aiting Zhou, Shuo Feng
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) urgently requires effective treatment. Bleomycin-induced lung injury models are characterized by initial inflammation and secondary fibrosis, consistent with the pathological features of IPF. Human amniotic epithelial cells (hAECs) exhibit good differentiation potential and paracrine activity and are thus ideal for cell-based clinical therapies. The therapeutic effects of hAECs on lung fibrosis are attributed to many factors. We performed a systematic review of preclinical studies investigating the treatment of pulmonary fibrosis with hAECs to provide suggestions for their clinical use...
2018: PloS One
https://www.readbyqxmd.com/read/29771572/inhibition-of-ubiquitin-activating-enzyme-protects-against-organ-injury-after-intestinal-ischemia-reperfusion
#15
Shingo Matsuo, Andrew Chaung, Deanna Liou, Ping Wang, Weng-Lang Yang
Intestinal ischemia-reperfusion (I/R) occurs in various clinical settings, such as transplantation, acute mesenteric arterial occlusion, trauma and shock. I/R injury causes severe systemic inflammation, leading to multiple organ dysfunction associated with high mortality. The ubiquitin proteasome pathway has been indicated in the regulation of inflammation, particularly through NF-κB signaling pathway. PYR-41 is a small molecular compound that selectively inhibits ubiquitin-activating enzyme E1. A mouse model of intestinal I/R injury by clamping the superior mesenteric artery for 45 minutes was performed to evaluate the effect of PYR-41 treatment on organ injury and inflammation...
May 17, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29770132/differing-outcome-of-experimental-autoimmune-encephalitis-in-macrophage-neutrophil-and-t-cell-specific-gp130-deficient-mice
#16
Kristian Holz, Marco Prinz, Stefanie M Brendecke, Alexandra Hölscher, Fengyuan Deng, Hans-Willi Mitrücker, Stefan Rose-John, Christoph Hölscher
gp130 cytokines are differentially involved in regulating the T helper (H) 17-driven pathogenesis of experimental autoimmune encephalomyelitis (EAE), the animal model of human multiple sclerosis. Interleukin (IL)-6 directly promotes the development of TH17 cells through the gp130/IL-6R complex. By contrast, IL-27 has been shown to suppress a TH17 immune response by gp130/IL-27R-alpha (α) receptor ligation. The IL-27-dependent regulation of a TH17 development could be mediated on the level of CD4 T cells. However, because IL-27 also suppresses the secretion of the TH17-driving cytokines IL-6 and IL-12/23p40 in accessory cells, TH17 immune responses may also be controlled by IL-27 on the level of macrophages and/or neutrophils...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29769642/high-resolution-imaging-of-myeloperoxidase-activity-sensors-in-human-cerebrovascular-disease
#17
Youssef Z Wadghiri, Dung Minh Hoang, Anita Leporati, Matthew J Gounis, Aurora Rodríguez-Rodríguez, Mary L Mazzanti, John P Weaver, Ajay K Wakhloo, Peter Caravan, Alexei A Bogdanov
Progress in clinical development of magnetic resonance imaging (MRI) substrate-sensors of enzymatic activity has been slow partly due to the lack of human efficacy data. We report here a strategy that may serve as a shortcut from bench to bedside. We tested ultra high-resolution 7T MRI (µMRI) of human surgical histology sections in a 3-year IRB approved, HIPAA compliant study of surgically clipped brain aneurysms. µMRI was used for assessing the efficacy of MRI substrate-sensors that detect myeloperoxidase activity in inflammation...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29769093/granulomatosis-with-polyangiitis-a-17-year-experience-from-a-tertiary-care-hospital-in-pakistan
#18
Omar Irfan, Haris Khan, Zarrar Khan, Alina Ashraf, Rimsha Ahmed, Javaid Ahmad Khan, Ali Bin Sarwar Zubairi
OBJECTIVE: Granulomatosis with Polyangiitis (GPA) is an autoimmune, multi-system, small and medium vessel vasculitis with granulomatous inflammation. Aim of this study was to assess the clinical and radiological presentations of patients with GPA amongst the Pakistani population. It is a single centre retrospective single observation study. RESULTS: Study was conducted at the Aga Khan University Hospital, Karachi with records were reviewed from January 2000 to December 2017...
May 16, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29768257/systemic-immune-inflammation-index-sii-is-useful-to-predict-survival-outcomes-in-patients-after-liver-transplantation-for-hepatocellular-carcinoma-within-hangzhou-criteria
#19
Hongyuan Fu, Jun Zheng, Jianye Cai, Kaining Zeng, Jia Yao, Liang Chen, Hui Li, Jiebin Zhang, Yingcai Zhang, Hui Zhao, Yang Yang
BACKGROUND: There is growing evidence that the systemic immune-inflammation index (SII), a novel prognostic biomarker based on peripheral lymphocyte, neutrophil, and platelet counts, is associated with poor prognosis for several tumors. However, the prognostic value of SII in patients with hepatocellular carcinoma (HCC) who undergo liver transplantation (LT) remains unclear. The aim of this study was to determine the correlation between SII and prognosis in these patients. METHODS: This retrospective study involved 150 patients with HCC who underwent LT within the Hangzhou criteria...
May 11, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29766753/toxicity-of-pristine-and-paint-embedded-tio-2-nanomaterials
#20
A T Saber, A Mortensen, J Szarek, N R Jacobsen, M Levin, I K Koponen, K A Jensen, U Vogel, H Wallin
Little is known on the toxicity of nanomaterials in the user phase. Inclusion of nanomaterials in paints is a common nanotechnology application. This study focuses on the toxicity of dusts from sanding of paints containing nanomaterials. We compared the toxicity of titanium dioxide nanomaterials (TiO2 NMs) and dusts generated by sanding boards coated with paints with different amounts of two different types of uncoated TiO2 NMs (diameters:10.5 nm and 38 nm). Mice were intratracheally instilled with a single dose of 18, 54 and 162 µg of TiO2 NMs or 54, 162 and 486 µg of sanding dusts...
January 1, 2018: Human & Experimental Toxicology
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