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https://www.readbyqxmd.com/read/29737232/kir6-2-the-pore-forming-subunit-of-atp-sensitive-k-channels-is-overexpressed-in-human-post-traumatic-brain-contusions
#1
Lidia Castro, Montoya Noelia, Marian Vidal-Jorge, David Sanchez-Ortiz, Dario Gándara, Elena Martínez-Saez, Marta Cicuendez, Maria A Poca, J Marc Simard, Juan Sahuquillo
Brain contusions (BCs) are one of the most frequent lesions in patients with moderate and severe traumatic brain injury (TBI). BCs increase their volume due to perilesional edema formation and/or hemorrhagic transformation. This may have deleterious consequences and its mechanisms are still poorly understood. We previously identified de novo upregulation SUR1, the regulatory subunit of KATP and other channels, in human BCs. Our aim here was to study the expression of the pore-forming subunit of KATP, Kir6.2, in human BCs, and identify its localization in different cell types...
May 8, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29698825/experimental-bovine-rotavirus-a-rv-a-infection-causes-intestinal-and-extra-intestinal-pathology-in-suckling-mice
#2
Gayatri Kashyap, R Singh, Y S Malik, R K Agrawal, K P Singh, P Kumar, M Sahoo, D Gupta, Rahul Singh
We describe here the intestinal and extra-intestinal spread of the species A rotavirus (RV-A) and associated lesions thereof in Swiss albino suckling mice pups, inoculated with a bovine-origin RV-A strain. In total, 35 suckling pups were used, wherein 20 pups received cell culture isolated RV-A @ 160 μL (TCID50 /ml, 5 × 106.5 ) per pup [oral 80 μL and intra peritoneal (IP) 80 μL] and served as an infected group, while 15 pups were kept in the control group and inoculated the same volume of phosphate buffered saline (PBS) of neutral pH orally and IP...
April 23, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29694345/diffusivity-in-the-core-of-chronic-multiple-sclerosis-lesions
#3
Alexander Klistorner, Chenyu Wang, Con Yiannikas, John Parratt, Joshua Barton, Yuyi You, Stuart L Graham, Michael H Barnett
BACKGROUND: Diffusion tensor imaging (DTI) has been suggested as a potential biomarker of disease progression, neurodegeneration and de/remyelination in MS. However, the pathological substrates that underpin alterations in brain diffusivity are not yet fully delineated. We propose that in highly cohesive fiber tracts: 1) a relative increase in parallel (axial) diffusivity (AD) may serve as a measure of increased extra-cellular space (ESC) within the core of chronic MS lesions and, as a result, may provide an estimate of the degree of tissue destruction, and 2) the contribution of the increased extra-cellular water to perpendicular (radial) diffusivity (RD) can be eliminated to provide a more accurate assessment of membranal (myelin) loss...
2018: PloS One
https://www.readbyqxmd.com/read/29648837/rheology-of-ultra-swollen-bicontinuos-lipidic-cubic-phases
#4
Chiara Speziale, Reza Ghanbari, Raffaele Mezzenga
Rheological studies of liquid crystalline systems based on monopalmitolein and 5 or 8% of 1,2 distearoylphosphatidylglycerol are reported. Such cubic phases have been shown to possess unusually large water channels, due to their ability of accommodating up to 80% wt of water, a feature that renders these systems suitable for crystallizing membrane proteins with large extra-cellular domains. Their mechanical properties are supposed to be substantially different from those of traditional cubic phases. Rheological measurements were carried out on cubic phases of both Pn3m and Ia3d symmetries...
April 12, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29563675/identification-of-iron-status-of-blood-donors-by-using-low-hemoglobin-density-and-microcytic-anemia-factor
#5
Ashutosh Singh, Rajendra Chaudhary, Hem C Pandey, Atul Sonker
BACKGROUND: Two new parameters low hemoglobin density (LHD) and microcytic anemia factor (Maf) have been used by Beckman-Coulter LH series analyzers as an easy screening tool for the early detection of iron deficiency. The main objective of this study was to assess if LHD and Maf could be used for assessment of iron status in blood donors and also to establish a cut-off for these two parameters at which a tentative iron deficiency could be reported conclusively. MATERIALS AND METHODS: LHD% and Maf could be calculated by knowing mean cell hemoglobin (Hb) concentration, Hb, and mean cellular volume and we used SPSS in calculating LHD and Maf from these parameters...
January 2018: Asian Journal of Transfusion Science
https://www.readbyqxmd.com/read/29536321/assessment-of-remote-myocardium-heterogeneity-in-patients-with-ventricular-tachycardia-using-texture-analysis-of-late-iodine-enhancement-lie-cardiac-computed-tomography-cct-images
#6
Antonio Esposito, Anna Palmisano, Sofia Antunes, Caterina Colantoni, Paola Maria Vittoria Rancoita, Davide Vignale, Francesca Baratto, Paolo Della Bella, Alessandro Del Maschio, Francesco De Cobelli
PURPOSE: Diffuse remodeling of myocardial extra-cellular matrix is largely responsible for left ventricle (LV) dysfunction and arrhythmias. Our hypothesis is that the texture analysis of late iodine enhancement (LIE) cardiac computed tomography (cCT) images may improve characterization of the diffuse extra-cellular matrix changes. Our aim was to extract volumetric extracellular volume (ECV) and LIE texture features of non-scarred (remote) myocardium from cCT of patients with recurrent ventricular tachycardia (rVT), and to compare these radiomic features with LV-function, LV-remodeling, and underlying cardiac disease...
March 13, 2018: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29402544/-facial-injections-of-hyaluronic-acid-based-fillers-for-malformations-preliminary-study-regarding-scar-tissue-improvement-and-cosmetic-betterment
#7
G Franchi, C Neiva-Vaz, A Picard, M-P Vazquez
BACKGROUND: Cross-linked hyaluronic acid-based fillers have gained rapid acceptance for treating facial wrinkles, deep tissue folds and sunken areas due to aging. This study evaluates, in addition to space-filling properties, their effects on softness and elasticity as a secondary effect, following injection of 3 commercially available cross-linked hyaluronic acid-based fillers (15mg/mL, 17,5mg/mL and 20mg/mL) in patients presenting with congenital or acquired facial malformations. PATIENTS ET METHODS: We started injecting gels of cross-linked hyaluronic acid-based fillers in those cases in 2013; we performed 46 sessions of injections in 32 patients, aged from 13-32...
February 2, 2018: Annales de Chirurgie Plastique et Esthétique
https://www.readbyqxmd.com/read/29226673/multiplexed-detection-of-attomoles-of-nucleic-acids-using-fluorescent-nanoparticle-counting-platform
#8
Xiaojing Pei, Haoyan Yin, Tiancheng Lai, Junlong Zhang, Feng Liu, Xiao Xu, Na Li
The sensitive multiplexed detection of nucleic acids in a single sample by a simple manner is of pivotal importance for the diagnosis and therapy of human diseases. Herein, we constructed an automatic fluorescent nanoparticle (FNP) counting platform with a common fluorescence microscopic imaging setup for nonamplification multiplexed detection of attomoles of nucleic acids. Taking the advantages of the highly bright, multicolor emitting FNPs and magnetic separation, the platform enables sensitive multiplexed detection without the need for extra fluorescent labels...
January 16, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29145428/abnormal-brain-white-matter-microstructure-is-associated-with-both-pre-hypertension-and-hypertension
#9
Hideaki Suzuki, He Gao, Wenjia Bai, Evangelos Evangelou, Ben Glocker, Declan P O'Regan, Paul Elliott, Paul M Matthews
OBJECTIVES: To characterize effects of chronically elevated blood pressure on the brain, we tested for brain white matter microstructural differences associated with normotension, pre-hypertension and hypertension in recently available brain magnetic resonance imaging data from 4659 participants without known neurological or psychiatric disease (62.3±7.4 yrs, 47.0% male) in UK Biobank. METHODS: For assessment of white matter microstructure, we used measures derived from neurite orientation dispersion and density imaging (NODDI) including the intracellular volume fraction (an estimate of neurite density) and isotropic volume fraction (an index of the relative extra-cellular water diffusion)...
2017: PloS One
https://www.readbyqxmd.com/read/29102929/three-dimensional-laser-scanning-confocal-analysis-of-conjunctival-microcysts-in-glaucomatous-patients-before-and-after-trabeculectomy
#10
Silvio DI Staso, Luca Agnifili, Angela DI Gregorio, Hilary Climastone, Emilio Galassi, Vincenzo Fasanella, Marco Ciancaglini
BACKGROUND/AIM: In glaucoma, conjunctival epithelial microcysts (CEM) have been extensively investigated by means of laser scanning confocal microscopy. In the present case series, we examined eight glaucomatous patients undergoing trabeculectomy to obtain a 3-dimensional (3-D) characterization of CEM. MATERIALS AND METHODS: Image acquisition was performed in z-scan automatic volume mode by Heidelberg Retina Tomograph III/Rostock Cornea Module and a series of 40 images of 300×300 μm (384×384 pixels) to a maximum depth of 40 μm were acquired throughout the upper bulbar conjunctiva before (at the site planned for surgery) and eight weeks after trabeculectomy...
November 2017: In Vivo
https://www.readbyqxmd.com/read/28946878/extra-cellular-expansion-in-the-normal-non-infarcted-myocardium-is-associated-with-worsening-of-regional-myocardial-function-after-acute-myocardial-infarction
#11
Pankaj Garg, David A Broadbent, Peter P Swoboda, James R J Foley, Graham J Fent, Tarique A Musa, David P Ripley, Bara Erhayiem, Laura E Dobson, Adam K McDiarmid, Philip Haaf, Ananth Kidambi, Saul Crandon, Pei G Chew, R J van der Geest, John P Greenwood, Sven Plein
BACKGROUND: Expansion of the myocardial extracellular volume (ECV) is a surrogate measure of focal/diffuse fibrosis and is an independent marker of prognosis in chronic heart disease. Changes in ECV may also occur after myocardial infarction, acutely because of oedema and in convalescence as part of ventricular remodelling. The objective of this study was to investigate changes in the pattern of distribution of regional (normal, infarcted and oedematous segments) and global left ventricular (LV) ECV using semi-automated methods early and late after reperfused ST-elevation myocardial infarction (STEMI)...
September 25, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28812126/myocardial-iodine-concentration-measurement-using-dual-energy-computed-tomography-for-the-diagnosis-of-cardiac-amyloidosis-a-pilot-study
#12
Virgile Chevance, Thibaud Damy, Vania Tacher, François Legou, Fourat Ridouani, Alain Luciani, Hicham Kobeiter, Alain Rahmouni, Jean-François Deux
OBJECTIVE: To measure myocardium iodine concentration (MIC) in patients with cardiac amyloidosis (CA) using dual-energy computed tomography (DECT). METHODS: Twenty-two patients with CA, 13 with non-amyloid hypertrophic cardiomyopathies (CH) and 10 control patients were explored with pre-contrast, arterial and 5-minute DECT acquisition (Iomeprol; 1.5 mL/kg). Inter-ventricular septum (IVS) thickness, blood pool iodine concentration (BPIC), MIC (mg/mL), iodine ratio and extra-cellular volume (ECV) were calculated...
February 2018: European Radiology
https://www.readbyqxmd.com/read/28782585/weaving-for-heart-valve-tissue-engineering
#13
REVIEW
Albert Liberski, Nadia Ayad, Dorota Wojciechowska, Radoslaw Kot, Duy M P Vo, Dilibaier Aibibu, Gerald Hoffmann, Chokri Cherif, Katharina Grobelny-Mayer, Marek Snycerski, Helmut Goldmann
Weaving is a resourceful technology which offers a large selection of solutions that are readily adaptable for tissue engineering (TE) of artificial heart valves (HV). The different ways that the yarns are interlaced in this technique could be used to produce complex architectures, such as the three-layer architecture of the leaflets. Once the assembly is complete, growth of cells in the scaffold would occur in the orientation of the yarn, enabling the deposition of extra cellular matrixes proteins in an oriented manner...
August 4, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28755376/the-cracam-robot-two-dimensional-crystallization-of-membrane-protein
#14
Philippe Rosier, Frédéric Gélébart, Nicolas Dumesnil, Gauthier Esnot, Manuela Dezi, Marc Morand, Catherine Vénien-Bryan
Membrane proteins are key cellular components that perform essential functions. They are major therapeutic targets. Electron crystallography can provide structural experimental information at atomic scale for membrane proteins forming two-dimensional (2D) crystals. There are two different methods to produce 2D crystals of membrane proteins. (1) either directly in the bulk of the solution (2) or under a lipid monolayer at the air-water interface. This extra lipid monolayer helps to pre-orient the proteins in order to facilitate the growth of 2D crystals...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28592435/gender-differences-in-renin-angiotensin-aldosterone-system-affect-extra-cellular-volume-in-healthy-subjects
#15
Tsjitske J Toering, Christina M Gant, Folkert W Visser, Anne Marijn van der Graaf, Gozewijn D Laverman, A H Jan Danser, Marijke M Faas, Gerjan Navis, A Titia Lely
OBJECTIVE Several studies reported gender differences in aldosterone. It is unknown whether these differences are associated with differences in volume regulation. Therefore, we studied both aldosterone and extracellular volume in men and women on different sodium intakes. METHODS In healthy normotensive men (n=18) and premenopausal women (n=18) we investigated plasma aldosterone, blood pressure, and extracellular volume (125I-iothalamate), during both a low (target intake 50 mmol Na+/day) and high sodium intake (target intake 200 mmol Na+/day) in a cross-over set-up...
June 7, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28583026/a-prolonged-antibiotic-protocol-to-treat-persistent-chlamydophila-pneumoniae-infection-improves-the-extracranial-venous-circulation-in-multiple-sclerosis
#16
Paul Thibault, John Attia, Chris Oldmeadow
Objective Chronic cerebrospinal venous insufficiency (CCSVI) is a condition associated with multiple sclerosis (MS). One mechanism that has been proposed is that the venous obstructions found in MS are due to a chronic persistent venulitis caused by the intra-cellular bacterial parasite, Chlamydophila pneumoniae (Cpn). The objective of the current study is to determine the effect of a combined antibiotic protocol (CAP) on the venous flow in MS patients as measured by a quantitative duplex ultrasound examination (QDUS)...
January 1, 2017: Phlebology
https://www.readbyqxmd.com/read/28482435/-expression-of-nf-%C3%AE%C2%BAb-in-a-degenerative-human-intervertebral-disc-model
#17
X F Wang, A P Zhang, Z Y Sun, C Liu, L H Kuang, J W Tian
Objective: To investigate the changes in the expression of NF-κB signaling pathway in human degenerative intervertebral discs. Methods: From October 2014 to March 2016, 55 nucleus pulposus of surgical patients with degenerative human intervertebral disc were collected for study in Department of Orthopedic Surgey, Hospital of Zaozhuang Mining Corporation, and Department of Orthopedics, Shanghai General Hospital Affiliated Shanghai Jiaotong University, School of Medicine.The collected nucleus pulposus tissues were divided into two groups: experimental group(30) and control group(25)...
May 9, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28413347/a-biochemo-mechano-coupled-computational-model-combining-membrane-transport-and-pericellular-proteolysis-in-tissue-mechanics
#18
A-T Vuong, A D Rauch, W A Wall
We present a computational model for the interaction of surface- and volume-bound scalar transport and reaction processes with a deformable porous medium. The application in mind is pericellular proteolysis, i.e. the dissolution of the solid phase of the extracellular matrix (ECM) as a response to the activation of certain chemical species at the cell membrane and in the vicinity of the cell. A poroelastic medium model represents the extra cellular scaffold and the interstitial fluid flow, while a surface-bound transport model accounts for the diffusion and reaction of membrane-bound chemical species...
March 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28281249/immunosensing-with-near-infrared-plasmonic-optical-fiber-gratings
#19
Christophe Caucheteur, Clotilde Ribaut, Viera Malachovska, Ruddy Wattiez
Surface Plasmon resonance (SPR) optical fiber biosensors constitute a miniaturized counterpart to the bulky prism configuration and offer remote operation in very small volumes of analyte. They are a cost-effective and relatively straightforward technique to yield in situ (or even possibly in vivo) molecular detection. They are usually obtained from a gold-coated fiber segment for which the core-guided light is brought into contact with the surrounding medium, either by etching (or side-polishing) or by using grating coupling...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28087487/bioprinting-for-vascular-and-vascularized-tissue-biofabrication
#20
REVIEW
Pallab Datta, Bugra Ayan, Ibrahim T Ozbolat
Bioprinting is a promising technology to fabricate design-specific tissue constructs due to its ability to create complex, heterocellular structures with anatomical precision. Bioprinting enables the deposition of various biologics including growth factors, cells, genes, neo-tissues and extra-cellular matrix-like hydrogels. Benefits of bioprinting have started to make a mark in the fields of tissue engineering, regenerative medicine and pharmaceutics. Specifically, in the field of tissue engineering, the creation of vascularized tissue constructs has remained a principal challenge till date...
March 15, 2017: Acta Biomaterialia
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