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https://www.readbyqxmd.com/read/28719888/inhibition-of-single-routes-of-intracellular-signaling-is-not-sufficient-to-neutralize-the-biphasic-disturbance-of-a-retinal-endothelial-cell-barrier-induced-by-vegf-a165
#1
Heidrun L Deissler, Gerhard K Lang, Gabriele E Lang
BACKGROUND/AIMS: Hallmark of diabetic macular edema is the enhanced permeability of retinal endothelial cells (REC) induced by vascular endothelial growth factor (VEGF-A165), which acts through activating specific receptors. To improve the predictability of inhibitors' potentials to block harmful effects of VEGF-A165, we investigated if its signaling pathways triggered in REC are redundant. METHODS: Immortalized bovine REC monolayers were treated with inhibitors specific for various protein kinases in combination with VEGF-A165...
July 18, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28719725/effects-of-eupatilin-on-the-contractility-of-corpus-cavernosal-smooth-muscle-through-nitric-oxide-independent-pathways
#2
S H Choo, S W Lee, M R Chae, S J Kang, H H Sung, D H Han, J N Chun, J K Park, C Y Kim, H K Kim, I So
Eupatilin (5,7-dihydroxy-3,4,6-trimethoxyflavone) is one of the main compounds present in Artemisia species. Eupatilin has both antioxidative and anti-inflammatory properties and a relaxation effect on vascular contraction regardless of endothelial function. We evaluated the relaxant effects of eupatilin on the corpus cavernosum (CC) of rabbits and the underlying mechanisms of its activity in human corpus cavernosum smooth muscle (CCSM) cells. Isolated rabbit CC strips were mounted in an organ bath system. A conventional whole-cell patch clamp technique was used to measure activation of calcium-sensitive K(+) -channel currents in human CCSM cells...
July 18, 2017: Andrology
https://www.readbyqxmd.com/read/28719670/suppressive-effect-of-amp-activated-protein-kinase-on-the-epithelial-mesenchymal-transition-in-retinal-pigment-epithelial-cells
#3
Ryo Matoba, Yuki Morizane, Yusuke Shiode, Masayuki Hirano, Shinichiro Doi, Shinji Toshima, Ryoichi Araki, Mika Hosogi, Tomoko Yonezawa, Fumio Shiraga
The epithelial-mesenchymal transition (EMT) in retinal pigment epithelial (RPE) cells plays a central role in the development of proliferative vitreoretinopathy (PVR). The purpose of this study was to investigate the effect of AMP-activated protein kinase (AMPK), a key regulator of energy homeostasis, on the EMT in RPE cells. In this study, EMT-associated formation of cellular aggregates was induced by co-stimulation of cultured ARPE-19 cells with tumor necrosis factor (TNF)-α (10 ng/ml) and transforming growth factor (TGF)-β2 (5 ng/ml)...
2017: PloS One
https://www.readbyqxmd.com/read/28719575/non-canonical-notch3-signalling-limits-tumour-angiogenesis
#4
Shuheng Lin, Ana Negulescu, Sirisha Bulusu, Benjamin Gibert, Jean-Guy Delcros, Benjamin Ducarouge, Nicolas Rama, Nicolas Gadot, Isabelle Treilleux, Pierre Saintigny, Olivier Meurette, Patrick Mehlen
Notch signalling is a causal determinant of cancer and efforts have been made to develop targeted therapies to inhibit the so-called canonical pathway. Here we describe an unexpected pro-apoptotic role of Notch3 in regulating tumour angiogenesis independently of the Notch canonical pathway. The Notch3 ligand Jagged-1 is upregulated in a fraction of human cancer and our data support the view that Jagged-1, produced by cancer cells, is inhibiting the apoptosis induced by the aberrant Notch3 expression in tumour vasculature...
July 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28719537/the-effect-of-slt-laser-application-on-iris-to-treat-sectorial-heterochromia-a-promising-technique
#5
Ayhan Basoglu, Uğur Çelik
The purpose of this study is to report a new and promising method for changing iris color in a sectorial heterochromia iridis patient. A 22-year-old man with a complaint of innate color disparity between his eyes presented to our clinic to seek medical advice. He underwent a comprehensive ophthalmic examination, including visual acuity, biomicroscopy, fundoscopy, intraocular pressure measurements, endothelial cell count, and evaluation of iridocorneal angle. The causes of acquired heterochromia were excluded...
July 14, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28719352/determination-of-il-6-tnf-%C3%AE-and-vegf-levels-in-the-serums-of-patients-with-colorectal-cancer
#6
Ö Coşkun, Ö Öztopuz, Ö F Özkan
Cytokines are multifunctional polypeptides synthesized by different body cells. They have clinical significance in terms of disease diagnosis, treatment and prevention. Cytokines TNF-α and IL-6 play an important role in the growth and differentiation of cells.Vascular Endothelial Growth Factor (VEGF) is excessively produced in epithelial, mesenchymal, and particularly in tumor cells. Studies have shown that the increased serum concentrations of IL-6, TNF-α, VEGF are strongly associated with colorectal cancer  and directly with the clinical stage of the disease...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28718964/antiangiogenic-effects-of-ziyuglycoside-ii-a-major-active-compound-of-sanguisorba-officinalis-l
#7
Sang-Hyeon Nam, Khaliunaa Lkhagvasuren, Hee Won Seo, Jin-Kyung Kim
Ziyuglycoside II, a major bioactive compound of Sanguisorba officinalis L., displays anticancer potential against several human cancer cells. However, little information concerning its antiangiogenic properties and possible mechanisms is available. The aim of this study was to investigate the inhibitory effects of ziyuglycoside II on angiogenesis. Ziyuglycoside II inhibited the proliferation, migration, and tubule formation of human umbilical vein endothelial cells, as well as the number of microvessels growing from the aortic rings...
July 18, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28718891/mk-reduces-inhaled-chlorine-triggered-ahr-and-airway-inflammation-in-the-mouse
#8
Yoichiro Hamamoto, Satoshi Ano, Benoit Allard, Michael O'Sullivan, Toby K McGovern, James G Martin
BACKGROUND AND PURPOSE: Cysteinyl leukotrienes (CysLTs) are pro-inflammatory lipid mediators that exacerbate disease state in several asthma phenotypes including asthma induced by allergen, virus and exercise. However, the role of CysLTs in irritant-induced airway disease is not well characterized. The purpose of the current study was to investigate the effect of montelukast (MK), a CysLT1R antagonist, on parameters of irritant-induced asthma (IIA) induced by inhalation of chlorine (Cl2 ) in the mouse...
July 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28718802/ouabain-protects-human-renal-cells-against-the-cytotoxic-effects-of-shiga-toxin-type-2-and-subtilase-cytotoxin
#9
María M Amaral, Magalí C Girard, Romina S Álvarez, Adrienne W Paton, James C Paton, Horacio A Repetto, Flavia Sacerdoti, Cristina A Ibarra
Hemolytic uremic syndrome (HUS) is one of the most common causes of acute renal failure in children. The majority of cases are associated with Shiga toxin (Stx)-producing Escherichia coli (STEC). In Argentina, HUS is endemic and presents the highest incidence rate in the world. STEC strains expressing Stx type 2 (Stx2) are responsible for the most severe cases of this pathology. Subtilase cytotoxin (SubAB) is another STEC virulence factor that may contribute to HUS pathogenesis. To date, neither a licensed vaccine nor effective therapy for HUS is available for humans...
July 18, 2017: Toxins
https://www.readbyqxmd.com/read/28718364/evaluation-of-epigenetic-inactivation-of-vascular-endothelial-growth-factor-receptors-in-head-and-neck-squamous-cell-carcinoma
#10
Yuki Misawa, Kiyoshi Misawa, Hideya Kawasaki, Atsushi Imai, Daiki Mochizuki, Ryuji Ishikawa, Shiori Endo, Masato Mima, Takeharu Kanazawa, Toshihide Iwashita, Hiroyuki Mineta
The aim of this study was to determine the methylation status of the genes encoding the vascular endothelial growth factor receptors and to evaluate the usefulness of VEGFR methylation as a prognostic indicator in head and neck squamous cell carcinoma. VEGFR messenger RNA expression and promoter methylation were examined in a panel of cell lines via quantitative reverse transcription and methylation-specific polymerase chain reaction, respectively. Promoter methylation was compared with clinical characteristics in 128 head and neck squamous cell carcinoma samples...
July 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28718318/high-glucose-induced-endothelial-progenitor-cell-dysfunction
#11
Hongyan Kang, Xuejiao Ma, Jiajia Liu, Yubo Fan, Xiaoyan Deng
Vascular complications contribute significantly to morbidity and mortality of diabetes mellitus. The primary cause of vascular complications in diabetes mellitus is hyperglycaemia, associated with endothelial dysfunction and impaired neovascularization. Circulating endothelial progenitor cells was shown to play important roles in vascular repair and promoting neovascularization. In this review, we will demonstrate the individual effect of high glucose on endothelial progenitor cells. Endothelial progenitor cells isolated from healthy subjects exposed to high glucose conditions or endothelial progenitor cells isolated from diabetic patients exhibit reduced number of endothelial cell colony forming units, impaired abilities of differentiation, proliferation, adhesion and migration, tubulization, secretion, mobilization and homing, whereas enhanced senescence...
July 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28718185/congenital-pulmonary-lymphangiectasia-a-disorder-not-only-of-fetoneonates
#12
Shi-Min Yuan
Congenital pulmonary lymphangiectasia (CPL) is a rare developmental disorder of the lung, characterized by dilation of pulmonary subpleural, interlobar, perivascular and peribronchial lymphatics. The incidence of CPL among stillborn and neonates was estimated to be <1%. The etiology of CPL is unknown. However, it has been suspected to be of a genetic background. Recent basic studies revealed that it might be caused by the FOXC2, Vegfr-3 and integrin α9β1gene mutations. A clinical diagnosis of CPL can be made much easier in full-term neonates who present with respiratory distress, pleural (especially chylous) effusions with or without generalized edema...
July 2017: Klinische Pädiatrie
https://www.readbyqxmd.com/read/28718014/protein-hydrolysate-from-canned-sardine-and-brewing-by-products-improves-tnf-%C3%AE-induced-inflammation-in-an-intestinal-endothelial-co-culture-cell-model
#13
Elsa F Vieira, John Van Camp, Isabel M P L V O Ferreira, Charlotte Grootaert
PURPOSE: The anti-inflammatory activity of sardine protein hydrolysates (SPH) obtained by hydrolysis with proteases from brewing yeast surplus was ascertained. METHODS: For this purpose, a digested and desalted SPH fraction with molecular weight lower than 10 kDa was investigated using an endothelial cell line (EA.hy926) as such and in a co-culture model with an intestinal cell line (Caco-2). Effects of SPH <10 kDa on nitric oxide (NO) production, reactive oxygen species (ROS) inhibition and secretion of monocyte chemoattractant protein 1 (MCP-1), vascular endothelial growth factor (VEGF), chemokine IL-8 (IL-8) and intercellular adhesion molecule-1 (ICAM-1) were evaluated in TNF-α-treated and untreated cells...
July 17, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28717801/mimicking-arterial-thrombosis-in-a-3d-printed-microfluidic-in-vitro-vascular-model-based-on-computed-tomography-angiography-data
#14
Pedro F Costa, Hugo J Albers, John E A Linssen, Heleen H T Middelkamp, Linda van der Hout, Robert Passier, Albert van den Berg, Jos Malda, Andries D van der Meer
Arterial thrombosis is the main instigating factor of heart attacks and strokes, which result in over 14 million deaths worldwide every year. The mechanism of thrombosis involves factors from the blood and the vessel wall, and it also relies strongly on 3D vessel geometry and local blood flow patterns. Microfluidic chip-based vascular models allow controlled in vitro studies of the interaction between vessel wall and blood in thrombosis, but until now, they could not fully recapitulate the 3D geometry and blood flow patterns of real-life healthy or diseased arteries...
July 18, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28717423/contribution-of-neuroblastoma-derived-exosomes-to-the-production-of-pro-tumorigenic-signals-by-bone-marrow-mesenchymal-stromal-cells
#15
Rie Nakata, Hiroyuki Shimada, G Esteban Fernandez, Rob Fanter, Muller Fabbri, Jemily Malvar, Pascale Zimmermann, Yves A DeClerck
The bone marrow (BM) niche is a microenvironment promoting survival, dormancy and therapeutic resistance in tumor cells. Central to this function are mesenchymal stromal cells (MSCs). Here, using neuroblastoma (NB) as a model, we demonstrate that NB cells release an extracellular vesicle (EVs) whose protein cargo is enriched in exosomal proteins but lacks cytokines and chemokines. Using three different purification methods, we then demonstrate that NB-derived exosomes were captured by MSCs and induced the production of pro-tumorigenic cytokines and chemokines, including interleukin-6 (IL-6), IL-8/CXCL8, vascular endothelial cell growth factor and monocyte-chemotactic protein-1, with exosomes prepared by size exclusion chromatography having the highest activity...
2017: Journal of Extracellular Vesicles
https://www.readbyqxmd.com/read/28717346/inflammatory-wnt5a-signalling-pathways-affecting-barrier-function-of-human-vascular-endothelial-cells
#16
Tom Skaria, Gabriele Schoedon
Wnt5A is a chemokine secreted by inflammatory-activated human macrophages that sustains their inflammatory response in an autocrine manner. High levels of Wnt5A are found in sera of patients with sepsis and septic shock. Here, we comment on recently reported Wnt5A signalling pathways in human vascular endothelial cells (VEC). In human VEC, Wnt5A regulates cytoskeleton remodelling and barrier function through Ryk receptor and Rho-associated protein serine/threonine kinase, targeting LIMK2 and CFL1 involved in actin polymerisation...
2017: Journal of Inflammation
https://www.readbyqxmd.com/read/28717326/honey-can-repairing-damage-of-liver-tissue-due-to-protein-energy-malnutrition-through-induction-of-endogenous-stem-cells
#17
R Heru Prasetyo, Eka Pramyrtha Hestianah
AIM: This study was to evaluate effect of honey in repairing damage of liver tissue due to energy protein malnutrition and in mobilization of endogenous stem cells. MATERIALS AND METHODS: Male mice model of degenerative liver was obtained through food fasting but still have drinking water for 5 days. It caused energy protein malnutrition and damage of liver tissue. The administration of 50% (v/v) honey was performed for 10 consecutive days, while the positive control group was fasted and not given honey and the negative control not fasted and without honey...
June 2017: Veterinary World
https://www.readbyqxmd.com/read/28717251/transdifferentiated-human-vascular-smooth-muscle-cells-are-a-new-potential-cell-source-for-endothelial-regeneration
#18
Xuechong Hong, Andriana Margariti, Alexandra Le Bras, Laureen Jacquet, Wei Kong, Yanhua Hu, Qingbo Xu
Endothelial dysfunction is widely implicated in cardiovascular pathological changes and development of vascular disease. In view of the fact that the spontaneous endothelial cell (EC) regeneration is a slow and insufficient process, it is of great interest to explore alternative cell sources capable of generating functional ECs. Vascular smooth muscle cell (SMC) composes the majority of the vascular wall and retains phenotypic plasticity in response to various stimuli. The aim of this study is to test the feasibility of the conversion of SMC into functional EC through the use of reprogramming factors...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28717225/a-mammalian-mirtron-mir-1224-promotes-tube-formation-of-human-primary-endothelial-cells-by-targeting-anti-angiogenic-factor-epsin2
#19
Eiko Sakai, Yusuke Miura, Emi Suzuki-Kouyama, Kengo Oka, Masashi Tachibana, Kenji Kawabata, Fuminori Sakurai, Hiroyuki Mizuguchi
Angiogenesis, new vessel formation from pre-existing vessels, is a highly conserved event through vertebrates. However, the system for tuning angiogenesis by species-intrinsic factors is totally unknown. miR-1224 is a member of mammal-specific mirtrons, which were identified as non-canonical microRNAs. We found that the expression of miR-1224 was upregulated in capillary-like tube-forming human umbilical vein endothelial cells on Matrigel. Enforced expression of miR-1224 stimulated tube formation, whereas repression of endogenous miR-1224 inhibited formation...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28717194/rapid-production-of-human-liver-scaffolds-for-functional-tissue-engineering-by-high-shear-stress-oscillation-decellularization
#20
Giuseppe Mazza, Walid Al-Akkad, Andrea Telese, Lisa Longato, Luca Urbani, Benjamin Robinson, Andrew Hall, Kenny Kong, Luca Frenguelli, Giusi Marrone, Oliver Willacy, Mohsen Shaeri, Alan Burns, Massimo Malago, Janet Gilbertson, Nigel Rendell, Kevin Moore, David Hughes, Ioan Notingher, Gavin Jell, Armando Del Rio Hernandez, Paolo De Coppi, Krista Rombouts, Massimo Pinzani
The development of human liver scaffolds retaining their 3-dimensional structure and extra-cellular matrix (ECM) composition is essential for the advancement of liver tissue engineering. We report the design and validation of a new methodology for the rapid and accurate production of human acellular liver tissue cubes (ALTCs) using normal liver tissue unsuitable for transplantation. The application of high shear stress is a key methodological determinant accelerating the process of tissue decellularization while maintaining ECM protein composition, 3D-architecture and physico-chemical properties of the native tissue...
July 17, 2017: Scientific Reports
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