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https://www.readbyqxmd.com/read/29381707/rasa3-controls-turnover-of-endothelial-cell-adhesion-and-vascular-lumen-integrity-by-a-rap1-dependent-mechanism
#1
Patricia Molina-Ortiz, Tanguy Orban, Maud Martin, Audrey Habets, Franck Dequiedt, Stéphane Schurmans
Rasa3 is a GTPase activating protein of the GAP1 family which targets R-Ras and Rap1. Although catalytic inactivation or deletion of Rasa3 in mice leads to severe hemorrhages and embryonic lethality, the biological function and cellular location of Rasa3 underlying these defects remains unknown. Here, using a combination of loss of function studies in mouse and zebrafish as well as in vitro cell biology approaches, we identify a key role for Rasa3 in endothelial cells and vascular lumen integrity. Specific ablation of Rasa3 in the mouse endothelium, but not in megakaryocytes and platelets, lead to embryonic bleeding and death at mid-gestation, recapitulating the phenotype observed in full Rasa3 knock-out mice...
January 30, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29322582/large-scale-disturbance-legacies-and-the-climate-sensitivity-of-primary-picea-abies-forests
#2
Jonathan S Schurman, Volodymyr Trotsiuk, Radek Bače, Vojtěch Čada, Shawn Fraver, Pavel Janda, Dominik Kulakowski, Jana Labusova, Martin Mikoláš, Thomas A Nagel, Rupert Seidl, Michal Synek, Kristýna Svobodová, Oleh Chaskovskyy, Marius Teodosiu, Miroslav Svoboda
Determining the drivers of shifting forest disturbance rates remains a pressing global change issue. Large-scale forest dynamics are commonly assumed to be climate driven, but appropriately scaled disturbance histories are rarely available to assess how disturbance legacies alter subsequent disturbance rates and the climate sensitivity of disturbance. We compiled multiple tree-ring based disturbance histories from primary Picea abies forest fragments distributed throughout five European landscapes spanning the Bohemian Forest and the Carpathian Mountains...
January 11, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29300888/telemonitoring-based-feedback-improves-adherence-to-non-vitamin-k-antagonist-oral-anticoagulants-intake-in-patients-with-atrial-fibrillation
#3
Lien Desteghe, Johan Vijgen, Pieter Koopman, Dagmara Dilling-Boer, Joris Schurmans, Paul Dendale, Hein Heidbuchel
Aims: To evaluate the effect of telemonitoring on adherence to non-vitamin K antagonist oral anticoagulants (NOACs) in atrial fibrillation (AF) patients. Methods and results: A randomized, single-blind, crossover, controlled trial in 48 AF patients on once or twice daily (OD or BID) NOAC. The Medication Event Monitoring System tracked NOAC intake during three phases of 3 months each: daily telemonitoring, telemonitoring with immediate telephone feedback in case of intake errors, and an observation phase without daily transmissions...
January 2, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29298605/conservative-treatment-of-a-posterior-intercostal-lung-herniation-a-case-report
#4
Anouschka Cogen, Paul Van Schil, Jef Schurmans
Introduction patients: A rare posterior intercostal lung herniation was diagnosed after a coughing spell by computed tomography and treated conservatively. Two years later, there were no specific complications or progression of the herniation. Methods, results and conclusions: There is no consensus on the indications for surgery and optimal treatment of this disorder.
January 3, 2018: Acta Chirurgica Belgica
https://www.readbyqxmd.com/read/29281761/outcomes-of-kidney-transplantations-in-children-weighing-15-kilograms-or-less-a-retrospective-cohort-study
#5
Benedetta Chiodini, Jean Herman, Ksenija Lolin, Brigitte Adams, Elise Hennaut, Pierre Lingier, Dimitri Mikhalski, Thierry Schurmans, Noël Knops, Karl M Wissing, Daniel Abramowicz, Khalid Ismaili
Kidney transplantation (KT) is often delayed in small children because of fear of post-operative complications. We report early and long-term outcomes in children transplanted at ≤15 kg in the two largest Belgian pediatric transplant centers. Outcomes before (period1) and since the introduction of basiliximab and mycophenolate-mofetil in 2000 (period2) were compared. Seventy-t wo KTs were realized between 1978 and 2016: 38 in period1 and 34 in period2. Organs came from deceased donors in 48 (67%) cases. Surgical complications occurred in 25 KTs (35%) with no significant difference between the two periods...
December 27, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/29275161/aging-inflammation-and-the-environment
#6
REVIEW
Arsun Bektas, Shepherd H Schurman, Ranjan Sen, Luigi Ferrucci
The aging process is driven by interrelated mechanisms that lead to the emergence of characteristic phenotypes that include changes in body composition, energy production and utilization imbalance, homeostatic dysregulation, and neurodegeneration and loss of neuroplasticity. Mainstream theories of aging all recognize that the aging phenotypes result from an imbalance between stressors and stress buffering mechanisms and a resultant loss of compensatory reserve leading to accumulation of unrepaired damage. This in turn results in increased disease susceptibility, reduced functional reserve, reduced healing capacity and stress resistance, unstable health and finally failure to thrive...
December 21, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29054532/a-randomized-clinical-trial-indicates-that-levamisole-increases-the-time-to-relapse-in-children-with-steroid-sensitive-idiopathic-nephrotic-syndrome
#7
Mariken P Gruppen, Antonia H Bouts, Marijke C Jansen-van der Weide, Maruschka P Merkus, Aleksandra Zurowska, Michal Maternik, Laura Massella, Francesco Emma, Patrick Niaudet, Elisabeth A M Cornelissen, Thierry Schurmans, Ann Raes, Johan van de Walle, Mieke van Dyck, Ashima Gulati, Arvind Bagga, Jean-Claude Davin
Levamisole has been considered the least toxic and least expensive steroid-sparing drug for preventing relapses of steroid-sensitive idiopathic nephrotic syndrome (SSINS). However, evidence for this is limited as previous randomized clinical trials were found to have methodological limitations. Therefore, we conducted an international multicenter, placebo-controlled, double-blind, randomized clinical trial to reassess its usefulness in prevention of relapses in children with SSINS. The efficacy and safety of one year of levamisole treatment in children with SSINS and frequent relapses were evaluated...
October 17, 2017: Kidney International
https://www.readbyqxmd.com/read/29042416/nicotine-prevents-and-reverses-paclitaxel-induced-mechanical-allodynia-in-a-mouse-model-of-cipn
#8
S Lauren Kyte, Wisam Toma, Deniz Bagdas, Julie A Meade, Lesley D Schurman, Aron H Lichtman, Zhi-Jian Chen, Egidio Del Fabbro, Xianjun Fang, John W Bigbee, M Imad Damaj, David A Gewirtz
Chemotherapy-induced peripheral neuropathy (CIPN), a consequence of peripheral nerve fiber dysfunction or degeneration, continues to be a dose-limiting and debilitating side effect during and/or after cancer chemotherapy. Paclitaxel, a taxane commonly used to treat breast, lung, and ovarian cancers, causes CIPN in 59-78% of cancer patients. Novel interventions are needed due to the current lack of effective CIPN treatments. Our studies were designed to investigate if nicotine can prevent and/or reverse paclitaxel-induced peripheral neuropathy in a mouse model of CIPN, while ensuring that nicotine will not stimulate lung tumor cell proliferation or interfere with the anti-tumor properties of paclitaxel...
October 17, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28977167/11%C3%AE-hydroxysteroid-dehydrogenase-type-ii-activity-is-affected-by-grapefruit-juice-and-intense-muscular-work
#9
Christopher Kargl, Mohammad Arshad, Fahad Salman, Regina C Schurman, Pedro Del Corral
OBJECTIVE: The enzymatic activity of 11β-hydroxysteroid dehydrogenase-2 (11β-HSD2) is key to protecting mineral corticoid receptors from cortisol and has been implicated in blood pressure regulation. Grapefruit juice (GFJ) and acidity are thought to inhibit this enzyme in vitro. This study examines the effect of GFJ and intense exercise on 11β-HSD2 enzyme activity in vivo. SUBJECTS AND METHODS: Eighteen subjects ingested GFJ or apple juice (CON) on separate days prior to reporting to the laboratory in a randomized order...
September 18, 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28951484/correction-for-sierra-potchanant-et-al-inpp5e-preserves-genomic-stability-through-regulation-of-mitosis
#10
Elizabeth A Sierra Potchanant, Donna Cerabona, Zahi Abdul Sater, Ying He, Zejin Sun, Jeff Gehlhausen, Stéphane Schurmans, Stéphanie Gayral, Grzegorz Nalepa
No abstract text is available yet for this article.
October 15, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28901776/liposomal-delivery-of-diacylglycerol-lipase-beta-inhibitors-to-macrophages-dramatically-enhances-selectivity-and-efficacy-in-vivo
#11
Myungsun Shin, Helena W Snyder, Giulia Donvito, Lesley D Schurman, Todd E Fox, Aron H Lichtman, Mark Kester, Ku-Lung Hsu
Diacylglycerol lipase-beta (DAGLβ) hydrolyzes arachidonic acid (AA)-containing diacylglycerols to produce bioactive lipids including endocannabinoids and AA-derived eicosanoids involved in regulation of inflammatory signaling. Previously, we demonstrated that DAGLβ inactivation using the triazole urea inhibitor KT109 blocked macrophage inflammatory signaling and reversed allodynic responses of mice in inflammatory and neuropathic pain models. Here, we tested whether we could exploit the phagocytic capacity of macrophages to localize delivery of DAGLβ inhibitors to these cells in vivo using liposome encapsulated KT109...
September 13, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28893111/using-tablet-based-technology-to-deliver-time-efficient-ototoxicity-monitoring
#12
Douglas Brungart, Jaclyn Schurman, Dawn Konrad-Martin, Kelly Watts, Jay Buckey, Odile Clavier, Peter G Jacobs, Samuel Gordon, Marilyn F Dille
OBJECTIVE: The goal of this article is to highlight mobile technology that is not yet standard of care but could be considered for use in an ototoxicity monitoring programme (OMP) as an adjunct to traditional audiometric testing. Current guidelines for ototoxicity monitoring include extensive test protocols performed by an audiologist in an audiometric booth. This approach is comprehensive, but it may be taxing for patients suffering from life-threatening illnesses and cost prohibitive if it requires serial clinical appointments...
September 12, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28857069/the-endogenous-cannabinoid-system-a-budding-source-of-targets-for-treating-inflammatory-and-neuropathic-pain
#13
Giulia Donvito, Sara R Nass, Jenny L Wilkerson, Zachary A Curry, Lesley D Schurman, Steven G Kinsey, Aron H Lichtman
A great need exists for the development of new medications to treat pain resulting from various disease states and types of injury. Given that the endogenous cannabinoid (that is, endocannabinoid) system modulates neuronal and immune cell function, both of which play key roles in pain, therapeutics targeting this system hold promise as novel analgesics. Potential therapeutic targets include the cannabinoid receptors, type 1 and 2, as well as biosynthetic and catabolic enzymes of the endocannabinoids N-arachidonoylethanolamine and 2-arachidonoylglycerol...
August 31, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28830894/endothelial-ship2-suppresses-nox2-nadph-oxidase-dependent-vascular-oxidative-stress-endothelial-dysfunction-and-systemic-insulin-resistance
#14
Nicole T Watt, Matthew C Gage, Peysh A Patel, Hema Viswambharan, Piruthivi Sukumar, Stacey Galloway, Nadira Y Yuldasheva, Helen Imrie, Andrew Mn Walker, Kathryn J Griffin, Natalia Makava, Anna Skromna, Katherine Bridge, David J Beech, Stéphane Schurmans, Stephen B Wheatcroft, Mark T Kearney, Richard M Cubbon
Shc homology 2-containing inositol 5´ phosphatase-2 (SHIP2) is as lipid phosphatase which inhibits insulin signaling downstream of phosphoinositide-3-kinase (PI3K); its role in vascular function is poorly understood. To examine its role in endothelial cell (EC) biology, we generated mice with catalytic inactivation of one SHIP2 allele selectively in EC (ECSHIP2(Δ/+)). Hyperinsulinemic euglycemic clamping studies revealed ECSHIP2(Δ/+) were resistant to insulin-stimulated glucose uptake in adipose tissue and skeletal muscle, compared with littermate controls...
August 22, 2017: Diabetes
https://www.readbyqxmd.com/read/28800390/how-ag-nanospheres-are-transformed-into-agau-nanocages
#15
Liane M Moreau, Charles A Schurman, Sumit Kewalramani, Mohammad M Shahjamali, Chad A Mirkin, Michael J Bedzyk
Bimetallic hollow, porous noble metal nanoparticles are of broad interest for biomedical, optical and catalytic applications. The most straightforward method for preparing such structures involves the reaction between HAuCl4 and well-formed Ag particles, typically spheres, cubes, or triangular prisms, yet the mechanism underlying their formation is poorly understood at the atomic scale. By combining in situ nanoscopic and atomic-scale characterization techniques (XAFS, SAXS, XRF, and electron microscopy) to follow the process, we elucidate a plausible reaction pathway for the conversion of citrate-capped Ag nanospheres to AgAu nanocages; importantly, the hollowing event cannot be explained by the nanoscale Kirkendall effect, nor by Galvanic exchange alone, two processes that have been previously proposed...
August 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28745125/a-fulminant-case-of-idiopathic-giant-cell-myocarditis
#16
W Schurmans, J Ector, E Verbeken, W Droogne
No abstract text is available yet for this article.
July 26, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28733462/human-t-cell-immunosenescence-and-inflammation-in-aging
#17
REVIEW
Arsun Bektas, Shepherd H Schurman, Ranjan Sen, Luigi Ferrucci
The aging process is driven by a finite number of inter-related mechanisms that ultimately lead to the emergence of characteristic phenotypes, including increased susceptibility to multiple chronic diseases, disability, and death. New assays and analytical tools have become available that start to unravel some of these mechanisms. A prevailing view is that aging leads to an imbalance between stressors and stress-buffering mechanisms that causes loss of compensatory reserve and accumulation of unrepaired damage...
October 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28724512/the-health-buddies-app-as-a-novel-tool-to-improve-adherence-and-knowledge-in-atrial-fibrillation-patients-a-pilot-study
#18
Lien Desteghe, Kiki Kluts, Johan Vijgen, Pieter Koopman, Dagmara Dilling-Boer, Joris Schurmans, Paul Dendale, Hein Heidbuchel
BACKGROUND: Atrial fibrillation (AF) constitutes an important risk for stroke, especially in an ageing population. A new app (Health Buddies) was developed as a tool to improve adherence to non-vitamin K antagonist oral anticoagulants (NOACs) in an elderly AF population by providing a virtual contract with their grandchildren, spelling out daily challenges for both. OBJECTIVE: The aim of this pilot study was to assess the feasibility and usability of the Health Buddies app in AF patients...
July 19, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28692655/population-based-incidence-seasonality-and-serotype-distribution-of-invasive-salmonellosis-among-children-in-nanoro-rural-burkina-faso
#19
Issa Guiraud, Annelies Post, Seydou Nakanabo Diallo, Palpouguini Lompo, Jessica Maltha, Kamala Thriemer, Christian Marc Tahita, Benedikt Ley, Karim Derra, Emmanuel Bottieau, Adama Kazienga, Céline Schurmans, Raffaella Ravinetto, Eli Rouamba, Johan Van Griensven, Sophie Bertrand, Halidou Tinto, Jan Jacobs
BACKGROUND: Bloodstream infections (BSI) caused by Salmonella Typhi and invasive non-Typhoidal Salmonella (iNTS) frequently affect children living in rural sub-Saharan Africa but data about incidence and serotype distribution are rare. OBJECTIVE: The present study assessed the population-based incidence of Salmonella BSI and severe malaria in a Health and Demographic Surveillance System in a rural area with seasonal malaria transmission in Nanoro, Burkina Faso. METHODS: Children between 2 months-15 years old with severe febrile illness were enrolled during a one-year surveillance period (May 2013-May 2014)...
2017: PloS One
https://www.readbyqxmd.com/read/28656703/examination-of-competing-diagnostic-models-of-functional-gastrointestinal-disorders-related-to-pain-in-children
#20
J V Schurman, B T Karazsia, C A Friesen
BACKGROUND: There have been no empirical validations of the Rome III or Rome IV criteria in children. The aim of the current study was to examine whether symptoms naturally occur in a pattern consistent with Rome III and/or Rome IV pediatric criteria for functional dyspepsia (FD) and irritable bowel syndrome (IBS). METHODS: We conducted a retrospective cohort study of 250 children, ages 8-17 years, presenting to an abdominal pain clinic with pain of at least 8 weeks duration...
November 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
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