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endothelial glycocalyx

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https://www.readbyqxmd.com/read/29338146/the-effect-of-various-doses-of-infusion-solutions-on-the-endothelial-glycocalyx-layer-in-laparoscopic-cholecystectomy-patients
#1
Matija Belavić, Vlatka Sotošek Tokmadžić, Elizabeta Fišić, Antonija Brozovic Krijan, Nedjeljko Strikić, Mirjana Lončarić Katušin, Josip Žunić
BACKGROUND: The endothelial glycocalyx is located on the luminal side of blood vessels and maintains vessel integrity. This study analysed how various dosages of infusion affected the secretion of atrial natriuretic peptide (ANP) and potential glycocalyx damage in patients undergoing laparoscopic cholecystectomy. We hypothesised that the liberal administration of Ringer's solution during the operation can cause iatrogenic hypervolemia with releasing of ANP and glycocalyx damage. METHODS: The study included 90 patients with American Society of Anesthesiologists' (ASA) class I and II, in good cardiopulmonary health, who were assigned to one of three groups: Restrictive group, which received 1 ml/kg/hr intraoperatively and six hours postoperatively; Low liberal group, which received 5 ml/kg/hr of Ringer's solution intraoperatively and six hours postoperatively and High liberal group, which received 15 ml/kg/hr intraoperatively and 10 ml/kg/hr six hours postoperatively...
January 16, 2018: Minerva Anestesiologica
https://www.readbyqxmd.com/read/29337920/acute-traumatic-endotheliopathy-in-isolated-severe-brain-injury-and-its-impact-on-clinical-outcome
#2
Venencia Albert, Arulselvi Subramanian, Deepak Agrawal, Hara Prasad Pati, Siddhartha Datta Gupta, Asok Kumar Mukhopadhyay
STUDY DESIGN: Prospective observational cohort. OBJECTIVE: To investigate the difference in plasma levels of syndecan-1 (due to glycocalyx degradation) and soluble thrombomodulin (due to endothelial damage) in isolated severe traumatic brain injury (TBI) patients with/without early coagulopathy. A secondary objective was to compare the effects of the degree of TBI endotheliopathy on hospital mortality among patients with TBI-associated coagulopathy (TBI-AC). METHODS: Data was prospectively collected on isolated severe TBI (sTBI) patients with Glasgow Coma Scale (GCS) ≤8 less than 12 h after injury admitted to a level I trauma centre...
January 16, 2018: Medical Sciences: Open Access Journal
https://www.readbyqxmd.com/read/29321567/structure-and-elasticity-of-bush-and-brush-like-models-of-the-endothelial-glycocalyx
#3
Aleksei Kabedev, Vladimir Lobaskin
The endothelial glycocalyx (EG), a sugar-rich layer that lines the luminal surface of blood vessels, is an important constituent of the vascular system. Although the chemical composition of the EG is fairly well known, there is no consensus regarding its ultrastructure. While previous experiments probed the properties of the layer at the continuum level, they did not provide sufficient insight into its molecular organisation. In this work, we investigate the EG mechanics using two simple brush and bush-like simulation models, and use these models to describe its molecular structure and elastic response to indentation...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29288385/the-pulmonary-vascular-barrier-insights-into-structure-function-and-regulatory-mechanisms
#4
Kaushik Parthasarathi
Pulmonary blood vessels act as a well-regulated barrier to the flux of fluid and solutes between the lumen and the air space. Perturbation of the barrier function results in excessive fluid leak into the interstitium and alveoli, and impairs gas exchange. Recent studies provide deeper insight into the precise control mechanisms involved in the regulation of the barrier. This chapter will highlight these mechanisms and discuss the current understanding on the fluid and solute transport pathways across the vascular endothelial layer...
2018: Advances in Anatomy, Embryology, and Cell Biology
https://www.readbyqxmd.com/read/29287059/microfluidics-a-high-throughput-system-for-the-assessment-of-the-endotheliopathy-of-trauma-and-the-effect-of-timing-of-plasma-administration-on-ameliorating-shock-associated-endothelial-dysfunction
#5
Lawrence N Diebel, Jonathan V Martin, David M Liberati
BACKGROUND: Early resuscitation after trauma-hemorrhagic shock (HS) with plasma rather than crystalloid may ameliorate systemic endothelial cell (EC) injury and dysfunction (endotheliopathy of trauma [EOT]). We postulated that endothelial lined microfluidic networks would be a useful platform to study the endothelial cell activation/injury under flow conditions to mimic HS. We then used the microfluidic system to further characterize the protective effects and optimal timing of plasma infusion on the development of "EOT" in our model...
December 28, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29259710/regulation-of-blood-vascular-permeability-in-the-skin
#6
REVIEW
Sachiko Ono, Gyohei Egawa, Kenji Kabashima
Regulation of blood vessel permeability is essential for the homeostasis of peripheral tissues. This regulation controls the trafficking of plasma contents, including water, vitamins, ions, hormones, cytokines, amyloids, lipoproteins, carrier proteins, and immunoglobulins. The properties of blood vessels vary among tissues based on their structural differences: continuous, fenestrated, or sinusoidal. These three types of blood vessels have different charge and size barrier properties. The anionic luminal glycocalyx layer on endothelial cells establishes the "charge barrier" that repels the attachment of negatively charged blood cells and plasma molecules...
2017: Inflammation and Regeneration
https://www.readbyqxmd.com/read/29212760/large-scale-molecular-dynamics-simulation-of-coupled-dynamics-of-flow-and-glycocalyx-towards-understanding-atomic-events-on-an-endothelial-cell-surface
#7
Xi Zhuo Jiang, Haipeng Gong, Kai Hong Luo, Yiannis Ventikos
The glycocalyx has a prominent role in orchestrating multiple biological processes occurring at the plasma membrane. In this paper, an all-atom flow/glycocalyx system is constructed with the bulk flow velocity in the physiologically relevant ranges for the first time. The system is simulated by molecular dynamics using 5.8 million atoms. Flow dynamics and statistics in the presence of the glycocalyx are presented and discussed. Complex dynamic behaviours of the glycocalyx, particularly the sugar chains, are observed in response to blood flow...
December 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29210138/endovascular-shedding-markers-in-patients-with-heart-failure-with-reduced-ejection-fraction
#8
Petra Nijst, Jirka Cops, Pieter Martens, Quirine Swennen, Matthias Dupont, W H Wilson Tang, Wilfried Mullens
BACKGROUND: Endothelial glycocalyx degradation has been associated with multiple pathophysiological processes in cardiovascular disease. AIMS: To explore the role of glycocalyx shedding markers in pathophysiology of heart failure with reduced ejection fraction (HFrEF). METHODS: In 123 HFrEF patients the concentration, prognostic value and association of glycocalyx shedding markers with other disease processes was investigated. RESULTS: Median hyaluronic acid (HA) levels and syndecan-1 levels in HFrEF patients were respectively 29...
December 6, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/29207649/sulodexide-recovers-endothelial-function-through-reconstructing-glycocalyx-in-the-balloon-injury-rat-carotid-artery-model
#9
Tianjia Li, Xinnong Liu, Zhewei Zhao, Leng Ni, Changwei Liu
Disruption of endothelial cell function is a principle event in cardiovascular disease. Accordingly, therapies have mostly focused on repairing the endothelium, but little attention has been paid to the reconstruction of glycocalyx, which covers the endothelium and protects the function of endothelial cells. Sulodexide has a similar glycosaminoglycan structure to glycocalyx, so it is assumed to be effective in remodeling the glycocalyx following damage. We assessed the effect of sulodexide on glycocalyx remodeling and endothelial function in the balloon-injury rat carotid artery model...
October 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/29207576/glycosaminoglycan-mediated-downstream-signaling-of-cxcl8-binding-to-endothelial-cells
#10
Rupert Derler, Bernd Gesslbauer, Corinna Weber, Elisabeth Strutzmann, Ingrid Miller, Andreas Kungl
The recruitment of leukocytes, mediated by endothelium bound chemokine gradients, is a vital process in inflammation. The highly negatively charged, unbranched polysaccharide family of glycosaminoglycans (GAGs), such as heparan sulfate and chondroitin sulfate mediate chemokine immobilization. Specifically the binding of CXCL8 (interleukin 8) to GAGs on endothelial cell surfaces is known to regulate neutrophil recruitment. Currently, it is not clear if binding of CXCL8 to GAGs leads to endothelial downstream signaling in addition to the typical CXCR1/CXCR2 (C-X-C motif chemokine receptor 1 and 2)-mediated signaling which activates neutrophils...
December 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29199903/more-than-a-biomarker-the-systemic-consequences-of-heparan-sulfate-fragments-released-during-endothelial-surface-layer-degradation-2017-grover-conference-series
#11
Kaori Oshima, Sarah M Haeger, Joseph A Hippensteel, Paco S Herson, Eric P Schmidt
Advances in tissue fixation and imaging techniques have yielded increasing appreciation for the glycosaminoglycan-rich endothelial glycocalyx and its in vivo manifestation, the endothelial surface layer (ESL). Pathological loss of the ESL during critical illness promotes local endothelial dysfunction and, consequently, organ injury. Glycosaminoglycan fragments, such as heparan sulfate, are released into the plasma of animals and humans after ESL degradation and have thus served as a biomarker of endothelial injury...
January 2018: Pulmonary Circulation
https://www.readbyqxmd.com/read/29194316/tubastatin-a-prevents-hemorrhage-induced-endothelial-barrier-dysfunction
#12
Peter J Bruhn, Vahagn C Nikolian, Ihab Halaweish, Zhigang Chang, Martin Sillesen, Baoling Liu, Yongqing Li, Hasan B Alam
BACKGROUND: Microvascular hyperpermeability resulting from endothelial barrier dysfunction (EBD) is associated with worse clinical outcomes in trauma-induced hemorrhagic shock. We have previously shown that treatment with Tubastatin A (TubA), a histone deacetylase 6 inhibitor, improves outcomes in animal models of shock. In this study, we investigate whether TubA treatment may prevent trauma-related EBD. METHODS: Wistar-Kyoto rats subjected to 40% hemorrhage were treated with TubA or vehicle control...
November 21, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29178990/variants-in-chondroitin-sulfate-metabolism-genes-in-thrombotic-storm
#13
Karen Nuytemans, Thomas L Ortel, Lissette Gomez, Natalia Hofmann, Natalie Alves, Nicole Dueker, Ashley Beecham, Patrice Whitehead, Susan Hahn Estabrooks, Craig S Kitchens, Doruk Erkan, Leonardo R Brandão, Andra H James, Roshni Kulkarni, Marilyn J Manco-Johnson, Margaret A Pericak-Vance, Jeffery M Vance
INTRODUCTION: Thrombotic storm (TS) presents as a severe, acute thrombotic phenotype, characterized by multiple clotting events and frequently affecting younger adults. Understanding the extensive hypercoagulation of an extreme phenotype as TS will also provide insight into the pathogenesis of a wider spectrum of thrombotic disorders. MATERIAL AND METHODS: We completed whole exome sequencing on 26 TS patients, including 1 multiplex family, 13 trios and 12 isolated TS patients...
November 21, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29162916/afm-based-detection-of-glycocalyx-degradation-and-endothelial-stiffening-in-the-db-db-mouse-model-of-diabetes
#14
Marta Targosz-Korecka, Magdalena Jaglarz, Katarzyna E Malek-Zietek, Aleksandra Gregorius, Agnieszka Zakrzewska, Barbara Sitek, Zenon Rajfur, Stefan Chlopicki, Marek Szymonski
Degradation of the glycocalyx and stiffening of endothelium are important pathophysiological components of endothelial dysfunction. However, to our knowledge, these events have not been investigated in tandem in experimental diabetes. Here, the mechanical properties of the glycocalyx and endothelium in ex vivo mouse aorta were determined simultaneously in indentation experiments with an atomic force microscope (AFM) for diabetic db/db and control db/+ mice at ages of 11-19 weeks. To analyze highly heterogeneous aorta samples, we developed a tailored classification procedure of indentation data based on a bi-layer brush model supplemented with Hertz model for quantification of nanomechanics of endothelial regions with and without the glycocalyx surface...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29145197/inflammatory-and-angiogenic-factors-linked-to-longitudinal-microvascular-changes-in-hemodialysis-patients-irrespective-of-treatment-dose-intensity
#15
Nicos Mitsides, Tom Cornelis, Natascha J H Broers, Nanada M P Diederen, Paul Brenchley, Nicole Heitink-Ter Braak, Frank M van der Sande, Casper G Schalkwijk, Jeroen P Kooman, Sandip Mitra
BACKGROUND: Cardiovascular disease is a major contributor to the poor outcomes observed in hemodialysis. We investigated the relationship between hemodialysis intensity and vascular parameters in high-dose (HDHD; >12hrs/week) and Conventional (CHD; ≤12hrs/week) hemodialysis intensity over a 6-month period. METHODS: We present the 6-month longitudinal analysis of a 2-year multicenter study investigating the effects of HDHD on cardiovascular parameters. We used pulse wave velocity, 24hr ambulatory blood pressure and sublingual dark field capillaroscopy measurements to assess macro- and microcirculation on 6-monthly basis...
November 16, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29127504/glycocalyx-in-atherosclerosis-relevant-endothelium-function-and-as-a-therapeutic-target
#16
REVIEW
Ronodeep Mitra, Gerard Leland O'Neil, Ian Chandler Harding, Ming Jie Cheng, Solomon Arko Mensah, Eno Essien Ebong
PURPOSE OF REVIEW: The cell surface-attached extracellular glycocalyx (GCX) layer is a major contributor to endothelial cell (EC) function and EC-dependent vascular health and is a first line of defense against vascular diseases including atherosclerosis. Here, we highlight our findings regarding three GCX-dependent EC functions, which are altered when GCX is shed and in atherosclerosis. We discuss why the GCX is a viable option for the prevention and treatment of atherosclerosis. RECENT FINDINGS: GCX regulated EC activities such as barrier and filtration function, active cell-to-cell communication, and vascular tone mediation contribute to function of the entire vascular wall...
November 10, 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/29121099/dengue-virus-ns1-cytokine-independent-vascular-leak-is-dependent-on-endothelial-glycocalyx-components
#17
Dustin R Glasner, Kalani Ratnasiri, Henry Puerta-Guardo, Diego A Espinosa, P Robert Beatty, Eva Harris
Dengue virus (DENV) is the most prevalent, medically important mosquito-borne virus. Disease ranges from uncomplicated dengue to life-threatening disease, characterized by endothelial dysfunction and vascular leakage. Previously, we demonstrated that DENV nonstructural protein 1 (NS1) induces endothelial hyperpermeability in a systemic mouse model and human pulmonary endothelial cells, where NS1 disrupts the endothelial glycocalyx-like layer. NS1 also triggers release of inflammatory cytokines from PBMCs via TLR4...
November 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29101181/endothelial-dysfunction-is-a-super-inducer-of-syndecan-4-fibrogenic-role-of-its-ectodomain
#18
Mark Lipphardt, Jong W Song, Brian B Ratliff, Hassan Dihazi, Gerhard A Müller, Michael S Goligorsky
Syndecan 4 (Synd4) is a member of membrane-spanning, glycocalyx-forming proteoglycan family. It has been suggested that Synd4 participates in renal fibrosis. We compared wild type and fibrosis-prone endothelial sirtuin1-deficient (Sirt1(endo)-/-) mice, the latter being a model of global endothelial dysfunction. We performed mass-spectrometry analysis, which revealed that Synd4 was highly enriched in the secretome of renal microvascular endothelial cells (RMVEC) obtained from Sirt1(endo)-/- mice upon stimulation with TGFβ1; notably all detectable peptides were confined to the ectodomain of Synd4...
November 3, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29093075/the-measurement-of-the-endothelial-glycocalyx-as-a-new-biomarker-of-endothelial-derangement-in-systemic-sclerosis-a-challenge-for-the-future
#19
EDITORIAL
Silvia Bellando-Randone, Marco Matucci-Cerinic
No abstract text is available yet for this article.
November 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/29073603/vascular-endothelial-dysfunction-during-cardiac-surgery-on-pump-versus-off-pump-coronary-surgery
#20
Florian Brettner, Daniel Chappell, Lisa Schwartz, Alexander Lukasz, Philipp Kümpers, Bernhard F Becker, Bruno Reichart, Markus Rehm, Dirk Bruegger
BACKGROUND: Cardiac surgery often causes ischemia and development of a systemic inflammatory response syndrome, which impairs vascular barrier function, normally maintained by the endothelial cell line and the endothelial glycocalyx (EG). The EG normally covers and protects healthy endothelial cells throughout the vasculature. The aim of the present study was to assess the disruption of the cellular part of the microvascular barrier by determining parameters of endothelial cell activation known to influence and reflect cell-cell junctional integrity...
October 26, 2017: European Surgical Research. Europäische Chirurgische Forschung. Recherches Chirurgicales Européennes
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