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Neutrophil imaging

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https://www.readbyqxmd.com/read/27920709/shoulder-pain-after-fall-septic-shock-and-pyomyositis-associated-with-breast-cancer-chemotherapy-and-lymphedema
#1
Hiromitsu Kitayama, Junko Sugiyama, Michiaki Hirayama, Yosihiro Onada, Yasushi Tsuji
BACKGROUND: As a symptom of pyomyositis, sepsis usually follows local inflammation signs. Here, we report pyomyositis with lymphedema of upper extremity in which septic shock and poor local findings initially presented during chemotherapy for breast cancer. CASE REPORT: An 80-year-old woman presented with chronic right shoulder pain during chemotherapy for the recurrent disease. She had a history of postmastectomy lymphedema, diabetes mellitus, and repeated hyaluronic acid injections to the shoulder joint...
September 2016: Case Reports in Oncology
https://www.readbyqxmd.com/read/27917008/visualization-of-neutrophil-extracellular-traps-and-fibrin-meshwork-in-human-fibrinopurulent-inflammatory-lesions-iii-correlative-light-and-electron-microscopic-study
#2
Takanori Onouchi, Kazuya Shiogama, Yasuyoshi Mizutani, Takashi Takaki, Yutaka Tsutsumi
Neutrophil extracellular traps (NETs) released from dead neutrophils at the site of inflammation represent webs of neutrophilic DNA stretches dotted with granule-derived antimicrobial proteins, including lactoferrin, and play important roles in innate immunity against microbial infection. We have shown the coexistence of NETs and fibrin meshwork in varied fibrinopurulent inflammatory lesions at both light and electron microscopic levels. In the present study, correlative light and electron microscopy (CLEM) employing confocal laser scanning microscopy and scanning electron microscopy was performed to bridge light and electron microscopic images of NETs and fibrin fibrils in formalin-fixed, paraffin-embedded, autopsied lung sections of legionnaire's pneumonia...
November 1, 2016: Acta Histochemica et Cytochemica
https://www.readbyqxmd.com/read/27912872/anti-allergic-potential-of-typhonium-blumei-inhibition-of-degranulation-via-suppression-of-pi3k-plc%C3%AE-2-phosphorylation-and-calcium-influx
#3
Michal Korinek, Kuan-Ming Chen, Yu-Han Jiang, Mohamed El-Shazly, Joel Stocker, Chon-Kit Chou, Tsong-Long Hwang, Yang-Chang Wu, Bing-Hung Chen, Fang-Rong Chang
BACKGROUND: Typhonium blumei Nicolson & Sivadasan (Araceae) is a traditional Chinese medicinal herb possessing detumescent, detoxifying, and anti-inflammatory activities. It is used in Taiwan as a folk medicine to treat cancer and inflammatory diseases. Typhonium blumei is usually not distinguished from Typhonium roxburghii Schott and they are commonly used interchangeably. PURPOSE: To evaluate and compare the anti-allergic and anti-inflammatory properties of T...
December 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27903742/p2y6-receptor-antagonist-mrs2578-inhibits-neutrophil-activation-and-aggregated-neutrophil-extracellular-trap-formation-induced-by-gout-associated-monosodium-urate-crystals
#4
Payel Sil, Craig P Hayes, Barbara J Reaves, Patrick Breen, Shannon Quinn, Jeremy Sokolove, Balázs Rada
Human neutrophils (polymorphonuclear leukocytes [PMNs]) generate inflammatory responses within the joints of gout patients upon encountering monosodium urate (MSU) crystals. Neutrophil extracellular traps (NETs) are found abundantly in the synovial fluid of gout patients. The detailed mechanism of MSU crystal-induced NET formation remains unknown. Our goal was to shed light on possible roles of purinergic signaling and neutrophil migration in mediating NET formation induced by MSU crystals. Interaction of human neutrophils with MSU crystals was evaluated by high-throughput live imaging using confocal microscopy...
November 30, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27903737/allergen-induced-cd4-t-cell-cytokine-production-within-airway-mucosal-dendritic-cell-t-cell-clusters-drives-the-local-recruitment-of-myeloid-effector-cells
#5
Tibor Z Veres, Tamás Kopcsányi, Nicholas van Panhuys, Michael Y Gerner, Zhiduo Liu, Pia Rantakari, Johannes Dunkel, Masayuki Miyasaka, Marko Salmi, Sirpa Jalkanen, Ronald N Germain
Allergic asthma develops in the mucosal tissue of small bronchi. At these sites, local cytokine production by Th2/Th17 cells is believed to be critical for the development of tissue eosinophilia/neutrophilia. Using the mouse trachea as a relevant model of human small airways, we performed advanced in vivo dynamic and in situ static imaging to visualize individual cytokine-producing T cells in the airway mucosa and to define their immediate cellular environment. Upon allergen sensitization, newly recruited CD4(+) T cells formed discrete Ag-driven clusters with dendritic cells (DCs)...
November 30, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27890780/a-clinical-score-to-predict-appendicitis-in-older-male-children
#6
Anupam B Kharbanda, Michael C Monuteaux, Richard G Bachur, Nanette C Dudley, Lalit Bajaj, Michelle D Stevenson, Charles G Macias, Manoj K Mittal, Jonathan E Bennett, Kelly Sinclair, Peter S Dayan
OBJECTIVE: To develop a clinical score to predict appendicitis among older, male children who present to the emergency department (ED) with suspected appendicitis. METHODS: Patients with suspected appendicitis were prospectively recruited at 9 pediatric EDs. A total 2,625 patients enrolled; a subset of 961 males, age 8-18 were analyzed in this secondary analysis. Outcomes determined by pathology, operative reports and follow-up calls. Clinical and laboratory predictors with < 10% missing data and Kappa > 0...
November 24, 2016: Academic Pediatrics
https://www.readbyqxmd.com/read/27889262/injections-of-predatory-bacteria-work-alongside-host-immune-cells-to-treat-shigella-infection-in-zebrafish-larvae
#7
Alexandra R Willis, Christopher Moore, Maria Mazon-Moya, Sina Krokowski, Carey Lambert, Robert Till, Serge Mostowy, R Elizabeth Sockett
Bdellovibrio bacteriovorus are predatory bacteria that invade and kill a range of Gram-negative bacterial pathogens in natural environments and in vitro [1, 2]. In this study, we investigated Bdellovibrio as an injected, antibacterial treatment in vivo, using zebrafish (Danio rerio) larvae infected with an antibiotic-resistant strain of the human pathogen Shigella flexneri. When injected alone, Bdellovibrio can persist for more than 24 hr in vivo yet exert no pathogenic effects on zebrafish larvae. Bdellovibrio injection of zebrafish containing a lethal dose of Shigella promotes pathogen killing, leading to increased zebrafish survival...
November 22, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27885812/a-whole-animal-chemical-screen-approach-to-identify-modifiers-of-intestinal-neutrophilic-inflammation
#8
Stefan H Oehlers, Maria Vega Flores, Christopher J Hall, Liuyang Wang, Dennis C Ko, Kathryn E Crosier, Philip S Crosier
By performing two high-content small molecule screens on DSS- and TNBS-induced zebrafish enterocolitis models of inflammatory bowel disease, we have identified novel anti-inflammatory drugs from the John Hopkins Clinical Compound Library that suppress neutrophilic inflammation. Live imaging of neutrophil distribution was used to assess the level of acute inflammation and concurrently screen for off-target drug effects. Supporting the validity of our screening strategy, most of the anti-inflammatory drug hits were known antibiotics or anti-inflammatory agents...
November 25, 2016: FEBS Journal
https://www.readbyqxmd.com/read/27885480/a-single-institution-s-long-term-follow-up-of-patients-with-pathological-complete-response-in-locally-advanced-rectal-adenocarcinoma-following-neoadjuvant-chemoradiotherapy
#9
Franscois Runau, Anna Collins, Glenn Ace Fenech, Eleanor Ford, Nikoletta Dimitriou, Sanjay Chaudhri, Justin M C Yeung
PURPOSE: This paper aimed to study the long term follow-up of patients with primary rectal adenocarcinoma receiving neoadjuvant chemoradiotherapy who obtained a pathological complete response (pCR) and identify factors predicting complete response. METHODS: Retrospective review of notes, histology, pre-operative full blood count and imaging of patients with primary rectal adenocarcinoma diagnosed in our institute from 2000 to 2012 from a prospectively maintained database were used...
November 24, 2016: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/27881485/visualization-of-ligand-induced-gi-protein-activation-in-chemotaxing-cells
#10
Kazuyuki Masuda, Jun-Ichi Kitakami, Tohru Kozasa, Tatsuhiko Kodama, Sigeo Ihara, Takao Hamakubo
Cell migration to chemoattractants is critically important in both normal physiology and the pathogenesis of many diseases. In GPCR-mediated chemotaxis, GPCRs transduce the gradient of an extracellular chemotactic ligand into intracellular responses via the activation of heterotrimeric G proteins. However, ligand-induced G protein activation has not been directly imaged as yet in mammalian chemotaxing cells. We developed a Förster resonance energy transfer (FRET) probe (R10-Gi) by linking the Gi protein α subunit to the regulator of G protein signaling domain...
November 23, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27877245/imaging-nanotherapeutics-in-inflamed-vasculature-by-intravital-microscopy
#11
REVIEW
Zhenjia Wang
Intravital microscopy (IVM) is the application of light microscopy to real time study biology of live animal tissues in intact and physiological conditions with the high spatial and temporal resolution. Advances in imaging systems, genetic animal models and imaging probes, IVM has offered quantitative and dynamic insight into cell biology, immunology, neurobiology and cancer. In this review, we will focus on the targeting of nanotherapeutics to inflamed vasculature. We will introduce the basic concept and principle of IVM and demonstrate that IVM is a powerful tool used to quantitatively determine the molecular mechanisms of interactions between nanotherapeutics and neutrophils or endothelium in living mice...
2016: Theranostics
https://www.readbyqxmd.com/read/27855336/targeting-distinct-myeloid-cell-populations-in%C3%A2-vivo-using-polymers-liposomes-and-microbubbles
#12
Can Ergen, Felix Heymann, Wa'el Al Rawashdeh, Felix Gremse, Matthias Bartneck, Ulf Panzer, Robert Pola, Michal Pechar, Gert Storm, Nicole Mohr, Matthias Barz, Rudolf Zentel, Fabian Kiessling, Christian Trautwein, Twan Lammers, Frank Tacke
Identifying intended or accidental cellular targets for drug delivery systems is highly relevant for evaluating therapeutic and toxic effects. However, limited knowledge exists on the distribution of nano- and micrometer-sized carrier systems at the cellular level in different organs. We hypothesized that clinically relevant carrier materials, differing in composition and size, are able to target distinct myeloid cell subsets that control inflammatory processes, such as macrophages, neutrophils, monocytes and dendritic cells...
November 9, 2016: Biomaterials
https://www.readbyqxmd.com/read/27853847/macrophage-derived-il-1%C3%AE-enhances-monosodium-urate-crystal-triggered-net-formation
#13
Payel Sil, Haley Wicklum, Chandler Surell, Balázs Rada
OBJECTIVE AND DESIGN: Arthritic gout is caused by joint inflammation triggered by the damaging effects of monosodium uric acid (MSU) crystal accumulation in the synovial space. Neutrophils play a major role in mediating joint inflammation in gout. Along with neutrophils, other immune cells, such as macrophages, are present in inflamed joints and contribute to gout pathogenesis. Neutrophils form neutrophil extracellular traps (NETs) in response to MSU crystals. In the presence of MSU crystals, macrophages release IL-1β, a cytokine crucial to initiate gout pathogenesis and neutrophil recruitment...
November 16, 2016: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/27845443/imaging-cytometry-of-human-leukocytes-with-third-harmonic-generation-microscopy
#14
Cheng-Ham Wu, Tzung-Dau Wang, Chia-Hung Hsieh, Shih-Hung Huang, Jong-Wei Lin, Szu-Chun Hsu, Hau-Tieng Wu, Yao-Ming Wu, Tzu-Ming Liu
Based on third-harmonic-generation (THG) microscopy and a k-means clustering algorithm, we developed a label-free imaging cytometry method to differentiate and determine the types of human leukocytes. According to the size and average intensity of cells in THG images, in a two-dimensional scatter plot, the neutrophils, monocytes, and lymphocytes in peripheral blood samples from healthy volunteers were clustered into three differentiable groups. Using these features in THG images, we could count the number of each of the three leukocyte types both in vitro and in vivo...
November 15, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27837107/rac2-functions-in-both-neutrophils-and-macrophages-to-mediate-motility-and-host-defense-in-larval-zebrafish
#15
Emily E Rosowski, Qing Deng, Nancy P Keller, Anna Huttenlocher
Leukocyte motility is required for host defense responses. Rac-family Rho GTPases are implicated in leukocyte function; however, the distinct roles of different Rac isoforms in host defense in vivo have remained unclear. In this study, we generated Rac2-deficient zebrafish using transcription activator-like effector nucleases to directly compare the role of Rac2 in vivo in neutrophils and macrophages in motility and the response to infection. This zebrafish larval model is highly amenable to live imaging of leukocyte behavior, and we report that in rac2(-/-) larvae both neutrophils and macrophages are defective in basic motility, leading to impaired responses to localized wounds or infections...
December 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27834173/effects-of-aggregatibacter-actinomycetemcomitans-leukotoxin-on-neutrophil-migration-and-extracellular-trap-formation
#16
Josefine Hirschfeld, Helen M Roberts, Iain L C Chapple, Marijo Parčina, Søren Jepsen, Anders Johansson, Rolf Claesson
BACKGROUND: Aggressive periodontitis is associated with the presence of Aggregatibacter actinomycetemcomitans, a leukotoxin (Ltx)-producing periodontal pathogen. Ltx has the ability to lyse white blood cells including neutrophils. OBJECTIVES: This study was aimed at investigating the interactions between neutrophils and Ltx with regard to the chemotactic properties of Ltx and the release of neutrophil extracellular traps (NETs). METHODS: Neutrophils from healthy blood donors were isolated and incubated for 30 min and 3 h with increasing concentrations of Ltx (1, 10, and 100 ng/mL) as well as with A...
2016: Journal of Oral Microbiology
https://www.readbyqxmd.com/read/27833165/genetic-and-pharmacological-inhibition-of-cdk9-drives-neutrophil-apoptosis-to-resolve-inflammation-in-zebrafish-in-vivo
#17
Laura J Hoodless, Christopher D Lucas, Rodger Duffin, Martin A Denvir, Christopher Haslett, Carl S Tucker, Adriano G Rossi
Neutrophilic inflammation is tightly regulated and subsequently resolves to limit tissue damage and promote repair. When the timely resolution of inflammation is dysregulated, tissue damage and disease results. One key control mechanism is neutrophil apoptosis, followed by apoptotic cell clearance by phagocytes such as macrophages. Cyclin-dependent kinase (CDK) inhibitor drugs induce neutrophil apoptosis in vitro and promote resolution of inflammation in rodent models. Here we present the first in vivo evidence, using pharmacological and genetic approaches, that CDK9 is involved in the resolution of neutrophil-dependent inflammation...
November 11, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27822698/automatic-detection-and-classification-of-leukocytes-using-convolutional-neural-networks
#18
Jianwei Zhao, Minshu Zhang, Zhenghua Zhou, Jianjun Chu, Feilong Cao
The detection and classification of white blood cells (WBCs, also known as Leukocytes) is a hot issue because of its important applications in disease diagnosis. Nowadays the morphological analysis of blood cells is operated manually by skilled operators, which results in some drawbacks such as slowness of the analysis, a non-standard accuracy, and the dependence on the operator's skills. Although there have been many papers studying the detection of WBCs or classification of WBCs independently, few papers consider them together...
November 7, 2016: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/27813700/current-challenges-for-the-targeted-delivery-and-molecular-imaging-of-stem-cells-in-animal-models
#19
Arezoo Momeni, Sriram Neelamegham, Natesh Parashurama
In contrast to conventional, molecular medicine that focuses on targeting specific pathways, stem cell therapy aims to perturb many related mechanisms in order to derive therapeutic benefit. This emerging modality is inherently complex due to the variety of cell types that can be used, delivery approaches that need to be optimized in order to target the cellular therapeutic to specific sites in vivo, and non-invasive imaging methods that are needed to monitor cell fate. This review highlights advancements in the field, with focus on recent publications that use preclinical animal models for cardiovascular stem cell therapy...
November 4, 2016: Bioengineered
https://www.readbyqxmd.com/read/27806633/surveillance-of-primary-sclerosing-cholangitis-with-erc-and-brush-cytology-risk-factors-for-cholangiocarcinoma
#20
Sonja Boyd, Harri Mustonen, Andrea Tenca, Kalle Jokelainen, Johanna Arola, Martti A Färkkilä
OBJECTIVE: Primary sclerosing cholangitis (PSC) is a chronic cholestatic liver disease leading to bile duct strictures and fibrosis, and predisposing to cholangiocarcinoma (CCA). Biliary dysplasia is a known precursor of CCA. In our unit, PSC patients undergo regular surveillance with ERC and brush cytology (BC), and liver transplantation is an option in case with biliary dysplasia. We evaluated the risk factors for biliary dysplasia and CCA based on ERC imaging, BC and liver function tests...
November 3, 2016: Scandinavian Journal of Gastroenterology
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