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leukocyte adhesion

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https://www.readbyqxmd.com/read/28822969/preconditioning-with-the-bkca-channel-activator-ns-1619-prevents-ischemia-reperfusion-induced-inflammation-and-mucosal-barrier-dysfunction-ros-and-ho-1
#1
Hongyan Dai, Meifang Wang, Parag N Patel, Theodore J Kalogeris, Yajun Liu, William Durante, Ronald J Korthuis
Activation of large conductance, calcium-activated potassium (BKCa) channels evokes cell survival programs that mitigate intestinal ischemia and reperfusion (I/R) inflammation and injury 24 hours later. The goal of the current study was to determine the role of reactive oxygen species (ROS) and heme oxygenase (HO)-1 in delayed acquisition of tolerance to I/R induced by pretreatment with the BKCa channel opener NS-1619. Superior mesentery arteries were occluded for 45 min followed by reperfusion for 70 min in wild type (WT) or HO-1 null (HO-1(-/-)) mice that were pretreated with NS-1619 or saline vehicle 24 hrs earlier...
August 19, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28822802/stromal-expression-of-activated-leukocyte-cell-adhesion-molecule-alcam-promotes-lung-tumor-growth-and-metastasis
#2
Ann-Helen Willrodt, Michal Beffinger, Martina Vranova, Darya Protsyuk, Katja Schuler, Maria Jadhav, Mathias Heikenwalder, Maries van den Broek, Lubor Borsig, Cornelia Halin Winter
Activated leukocyte cell adhesion molecule (ALCAM) is expressed on various cell types, including leukocytes, endothelial cells and certain tumor cells. While ALCAM expression on tumor cells has been linked with tumor invasion and metastatic spread, the contribution of ALCAM expressed in cells forming the tumor stroma to cancer progression has not been investigated. In this study, we made use of ALCAM-deficient (ALCAM(-/-)) mice to evaluate the role of ALCAM in lung tumor growth and metastasis. ALCAM(-/-) mice displayed an altered blood vascular network in the lung and the diaphragm, indicative of an angiogenesis defect...
August 16, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28821422/adhesion-molecules-chemokines-and-matrix-metallo-proteinases-response-after-albendazole-and-albendazole-plus-steroid-therapy-in-swine-neurocysticercosis
#3
Satyendra K Singh, Kashi N Prasad, Aloukick K Singh, Kamlesh K Gupta, Amrita Singh, Mukesh Tripathi, Rakesh K Gupta
The treatment of neurocysticercosis (NCC) varies with location, number and stage of the Taenia solium cysticerci (cysts). Albendazole (ABZ) effectively kills cysticerci, and subsequently induces neuro-inflammation facilitated by leukocyte infiltration. We hypothesize that immune response varies around drug responder (degenerating/dying) and non-responder (viable) cysts after ABZ and ABZ plus steroid (ABZS) therapy, which may determine the disease pathogenesis. Twenty cysticercotic swine were treated with ABZ (n = 10; group1) and ABZS (n = 10; group2)...
August 15, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28818665/irf-5-accelerates-leukocyte-adhesion-to-endothelial-cells-in-ischemia-reperfusion-injury-through-regulating-the-transcription-of-vcam-1
#4
Hongbin Cai, Zhuhua Yao, Wenting Li
Ischemia-reperfusion injury (IRI) has been implicated in many pathological conditions, including cardiovascular diseases. Adhesion of leukocytes to the surface of endothelial cells has been considered as one of the principle steps in the pathological cascade of inflammatory tissue damage during IRI. The role of the transcriptional factor interferon regulatory factor-5 (IRF-5) in endothelial physiology remains unknown. Here, we report that IRF-5 is expressed in human umbilical vein endothelial cells (HUVECs) and is rapidly upregulated in response to IRI, mediated by the JAK2/STAT3 pathway...
August 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28818494/gts-21-reduces-microvascular-permeability-during-experimental-endotoxemia
#5
Karsten Schmidt, Sukanya Bhakdisongkhram, Florian Uhle, Christoph Philipsenburg, Aleksandar R Zivkovic, Thorsten Brenner, Johann Motsch, Markus A Weigand, Stefan Hofer
INTRODUCTION: No effective pharmacological therapy is currently available to attenuate tissue edema formation due to increased microvascular permeability in sepsis. Cholinergic mediators have been demonstrated to exert anti-inflammatory effects via the α7 nicotinic acetylcholine receptor (α7nAChR) during inflammation. GTS-21, a partial α7nAChR agonist, is an appealing therapeutic substance for sepsis-induced microvascular inflammation due to its demonstrated cholinergic anti-inflammatory properties and its favorable safety profile in clinical trials...
August 14, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28811304/selectin-catch-bonds-mechanotransduce-integrin-activation-and-neutrophil-arrest-on-inflamed-endothelium-under-shear-flow
#6
Vasilios A Morikis, Shannon Chase, Ted Wun, Elliot L Chaikof, John L Magnani, Scott I Simon
E-selectin extends from the plasma membrane of inflamed endothelium and serves to capture leukocytes from flowing blood via long-lived catch-bonds that support slow leukocyte rolling under shear stress. Its ligands are glycosylated with the tetrasaccharide sialyl Lewis(x) (sLe(x)), which contributes to bond affinity and specificity. E-selectin mediated rolling transmits signals into neutrophils that triggers activation of high-affinity β2-integrins necessary for transition to shear resistant adhesion and transendothelial migration...
August 15, 2017: Blood
https://www.readbyqxmd.com/read/28803958/identification-and-characterization-of-lymph-organ-micrornas-in-red-swamp-crayfish-procambarus-clarkii-infected-with-white-spot-syndrome-virus
#7
Zhi-Qiang Du, Xiao-Yun Leng, Xiu-Li Shen, Yan-Hui Jin, Xin-Cang Li
MicroRNAs (miRNAs) were important post-transcriptional regulators and played vital roles in innate immunity system of invertebrates, especially in the aspect of antivirus. In this study, using high-throughput small RNAs Illumina sequencing system, differentially expressed miRNAs (DEMs) from lymph organs in red swamp crayfish, Procambarus clarkii, infected with white spot syndrome virus, were identified. As a result, 32 known miRNAs and 7 novel miRNAs were identified in crayfish lymph organ small RNAs library of NG and WG...
August 10, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28798145/tnf-induces-neutrophil-adhesion-via-formin-dependent-cytoskeletal-reorganization-and-activation-of-%C3%AE-integrin-function
#8
Angélica Aparecida Antoniellis Silveira, Venina Marcela Dominical, Camila Bononi Almeida, Hanan Chweih, Wilson Alves Ferreira, Cristina Pontes Vicente, Fabio Trindade Maranhão Costa, Claudio C Werneck, Fernando Ferreira Costa, Nicola Conran
Although essential for inflammatory responses, leukocyte recruitment to blood vessel walls in response to inflammatory stimuli, such as TNF-α, can contribute to vascular occlusion in inflammatory diseases, including atherosclerosis. We aimed to further characterize the mechanisms by which TNF stimulates adhesive and morphologic alterations in neutrophils. Microfluidic and intravital assays confirmed the potent effect that TNF has on human and murine neutrophil adhesion and recruitment in vitro and in vivo, respectively...
August 10, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28791819/decreased-sl-selectin-serum-levels-in-sleep-apnea-syndrome-patients-with-cardiovascular-diseases
#9
Monika Kosacka, Irena Porębska, Renata Jankowska
BACKGROUND: Obstructive sleep apnea syndrome (OSA) is a common disorder associated with an increased risk of cardiovascular diseases. OBJECTIVES: sL-selectin is an adhesion molecule released from the surface of leukocytes as they are activated and may inhibit leukocyte attachment to the endothelium. The aim of this study was to evaluate sL-selectin serum levels in OSA patients with cardiovascular diseases. MATERIAL AND METHODS: A total of 163 OSA patients were enrolled in the study...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28783210/monocyte-count-at-onset-predicts-post-stroke-outcomes-during-a-90-day-follow-up
#10
Luca Liberale, Fabrizio Montecucco, Aldo Bonaventura, Ilaria Casetta, Silva Seraceni, Alessandro Trentini, Marina Padroni, Franco Dallegri, Enrico Fainardi, Federico Carbone
BACKGROUND: Acute ischemic stroke (AIS) triggers both systemic and neurovascular inflammation, influencing post-stroke recovery. In smokers with AIS inflammation might be further upregulated, increasing ischemia/reperfusion injury. Here, the predictive value of leukocyte and adhesion molecules levels on post-stroke outcomes was investigated. MATERIALS AND METHODS: 89 patients with AIS (n=30 smokers and n=59 non-smokers) were recruited and evaluated 1, 7 and 90 days after the onset to assess stroke severity by the National Institute of Health Stroke Scale (NIHSS) score as well as clinical recovery at 90 day by the modified Rankin Scale (mRS)...
August 7, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28780099/effect-of-recombinant-bovine-somatotropin-on-leukocyte-mrna-expression-for-genes-related-to-cell-energy-metabolism-cytokine-production-phagocytosis-oxidative-burst-and-adaptive-immunity
#11
P R B Silva, C D Nelson, J P Driver, W W Thatcher, R C Chebel
Objectives of the current experiment were to evaluate the effects of treatment of periparturient dairy cows with recombinant bovine somatotropin (rbST) on mRNA expression in peripheral leukocytes for genes related to the somatotropic axis, cell energy metabolism, and innate and adaptive immune responses. Cows were enrolled in the experiment at 253 ± 3 d of gestation and assigned to an untreated control group (n = 98) or to receive 125 mg of rbST weekly from -21 to 21 d relative to calving (rbST125; n = 98)...
August 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28775074/stasis-promotes-erythrocyte-adhesion-to-von-willebrand-factor
#12
Michel W J Smeets, Marjon J Mourik, Hans W M Niessen, Peter L Hordijk
OBJECTIVE: Venous thromboembolism is a major contributor to global disease burden. Leukocytes and platelets initiate thrombogenesis on blood stasis and initiate the formation of a fibrin, VWF (von Willebrand factor), and neutrophil extracellular trap scaffolds for erythrocytes. However, there is little knowledge on how erythrocytes become stably incorporated into this scaffold. Recently, we described the adhesion of calcium-loaded erythrocytes to endothelial-derived VWF strings. Because VWF is part of the scaffold of venous thrombi, we questioned whether reduced flow or stasis promotes the adhesion of normal erythrocytes to VWF and whether venous thrombi show evidence of erythrocyte-VWF interactions...
August 3, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28772696/effect-of-immobilized-antithrombin-iii-on-the-thromboresistance-of-polycarbonate-urethane
#13
Karin Lukas, Karin Stadtherr, Andre Gessner, Daniel Wehner, Thomas Schmid, Hans Peter Wendel, Christof Schmid, Karla Lehle
The surface of foils and vascular grafts made from a thermoplastic polycarbonate urethanes (PCU) (Chronoflex AR) were chemically modified using gas plasma treatment, binding of hydrogels-(1) polyethylene glycol bisdiamine and carboxymethyl dextran (PEG-DEX) and (2) polyethyleneimine (PEI)-and immobilization of human antithrombin III (AT). Their biological impact was tested in vitro under static and dynamic conditions. Static test methods showed a significantly reduced adhesion of endothelial cells, platelets, and bacteria, compared to untreated PCU...
March 24, 2017: Materials
https://www.readbyqxmd.com/read/28765077/resolution-of-vascular-injury-specialized-lipid-mediators-and-their-evolving-therapeutic-implications
#14
REVIEW
Bian Wu, Giorgio Mottola, Melinda Schaller, Gilbert R Upchurch, Michael S Conte
Acute vascular injury occurs in a number of important clinical contexts, including spontaneous disease-related events (e.g. plaque rupture, thrombosis) and therapeutic interventions such as angioplasty, stenting, or bypass surgery. Endothelial cell (EC) disruption exposes the underlying matrix, leading to a rapid deposition of platelets, coagulation proteins, and leukocytes. A thrombo-inflammatory response ensues characterized by leukocyte recruitment, vascular smooth muscle cell (VSMC) activation, and the elaboration of cytokines, reactive oxygen species and growth factors within the vessel wall...
August 3, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/28762564/capsaicin-induced-rapid-neutrophil-leukocyte-activation-in-the-rat-urinary-bladder-microcirculatory-bed
#15
Péter Járomi, Dénes Garab, Petra Hartmann, Dóra Bodnár, Sándor Nyíri, Péter Sántha, Mihály Boros, Gábor Jancsó, Andrea Szabó
AIMS: This study was initiated to investigate the involvement of neutrophil leukocyte activation in neurogenic inflammation, a process also involved in human urinary pathologies, elicited in the rat urinary bladder by the local administration of capsaicin, the archetypal TRPV1 agonist. The contribution of afferent nerves and sensory neuropeptides to leukocyte activation in the urinary bladder microcirculatory bed was examined. METHODS: Following a 15-min topical application of capsaicin (50 μM), leukocyte-endothelial interactions were examined for an observation period of 45 min with intravital microscopy...
August 1, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28756094/nanotraps-with-biomimetic-surface-as-decoys-for-chemokines
#16
Ivan Guryanov, Sabrina Cipriani, Stefano Fiorucci, Natalia Zashikhina, Silvia Marchianò, Paolo Scarpelli, Viktor Korzhikov-Vlakh, Ekaterina Popova, Evgenia Korzhikova-Vlakh, Barbara Biondi, Fernando Formaggio, Tatiana Tennikova
A creation of nanotraps that could selectively recognize the chemotactic mediators of leukocyte adhesion and eliminate them from the bloodstream and tissue intercellular matrix is a promising approach for the treatment of various inflammatory and autoimmune diseases. We designed nanotraps as artificial decoy receptors based on poly(lactic acid) (PLA) nanoparticles covered by heparin and bearing on the surface two fragments of CCR5 receptor (N-terminal domain, Nt, and second extracellular loop, ECL2), responsible for chemokine binding...
July 26, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28755848/the-use-of-brazilian-propolis-for-discovery-and-development-of-novel-anti-inflammatory-drugs
#17
REVIEW
Marcelo Franchin, Irlan Almeida Freires, Josy Goldoni Lazarini, Bruno Dias Nani, Marcos Guilherme da Cunha, David Fernando Colón, Severino Matias de Alencar, Pedro Luiz Rosalen
Anti-Inflammatory drugs have been routinely used in the management of acute and chronic inflammatory conditions. Nevertheless, their undesirable side and adverse effects have encouraged the development of more selective, tolerable and efficacious drugs able to modulate the inflammatory process through distinct mechanisms than those of drugs currently available in the market, for instance, inhibition of leukocyte recruitment (chemotaxis, rolling, adhesion and transmigration). Natural products, including Brazilian propolis, have been considered a rich source of anti-inflammatory molecules due to a very complex phytochemical diversity...
June 27, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28752053/dietary-sugars-not-lipids-drive-hypothalamic-inflammation
#18
Yuanqing Gao, Maximilian Bielohuby, Thomas Fleming, Gernot F Grabner, Ewout Foppen, Wagner Bernhard, Mara Guzmán-Ruiz, Clarita Layritz, Beata Legutko, Erwin Zinser, Cristina García-Cáceres, Ruud M Buijs, Stephen C Woods, Andries Kalsbeek, Randy J Seeley, Peter P Nawroth, Martin Bidlingmaier, Matthias H Tschöp, Chun-Xia Yi
OBJECTIVE: The hypothalamus of hypercaloric diet-induced obese animals is featured by a significant increase of microglial reactivity and its associated cytokine production. However, the role of dietary components, in particular fat and carbohydrate, with respect to the hypothalamic inflammatory response and the consequent impact on hypothalamic control of energy homeostasis is yet not clear. METHODS: We dissected the different effects of high-carbohydrate high-fat (HCHF) diets and low-carbohydrate high-fat (LCHF) diets on hypothalamic inflammatory responses in neurons and non-neuronal cells and tested the hypothesis that HCHF diets induce hypothalamic inflammation via advanced glycation end-products (AGEs) using mice lacking advanced glycation end-products (AGEs) receptor (RAGE) and/or the activated leukocyte cell-adhesion molecule (ALCAM)...
August 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28750142/feline-leukocyte-adhesion-cd18-deficiency-caused-by-a-deletion-in-the-integrin-%C3%AE-2-itgb2-gene
#19
Thomas R Bauer, Suzanne M Pratt, Christina M Palena, Karthik Raj, Urs Giger
BACKGROUND: Leukocyte adhesion deficiency (LAD) or CD18 deficiency is an autosomal recessive immunodeficiency which has been described in people, cattle, dogs, and knockout mice. OBJECTIVES: The study goals were to characterize the clinicopathologic, immunologic, and molecular genetic features of feline LAD (FLAD) in a neutered male adult Domestic Longhair cat with severe leukocytosis and recurrent infections. METHODS: Flow cytometry evaluated surface expression of CD18 on neutrophils...
July 27, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28749086/1-palmitoyl-2-linoleoyl-3-acetyl-rac-glycerol-plag-reduces-hepatic-injury-in-concanavalin-a-treated-mice
#20
Young-Eun Ko, Sun Young Yoon, Sun-Yung Ly, Joo-Heon Kim, Ki-Young Sohn, Jae Wha Kim
1-palmitoyl-2-linoleoyl-3-acetyl-rac-glycerol (PLAG), a chemically synthesized monoacetyldiaglyceride, is one of the constituents in Sika deer antlers and has been known traditionally as having immunomodulatory effects. However, the mechanism by which PLAG controls neutrophil migration, which evokes liver injury in the hepatitis animal model, remains largely unknown. This study was designed to evaluate the immunomodulatory effects of PLAG on cytokine secretion and neutrophil migration in vivo and in vitro. The injection of mice with Concanavalin A (Con A) induced leukocyte infiltration in the liver and increased plasma cytokine levels...
July 27, 2017: Journal of Cellular Biochemistry
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