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https://www.readbyqxmd.com/read/28937238/effects-of-roflumilast-a-phosphodiesterase-4-inhibitor-on-the-lung-functions-in-a-saline-lavage-induced-model-of-acute-lung-injury
#1
P Kosutova, P Mikolka, M Kolomaznik, S Rezakova, A Calkovska, D Mokra
Acute lung injury (ALI) is associated with deterioration of alveolar-capillary lining and transmigration and activation of inflammatory cells. Whereas a selective phosphodiesterase-4 (PDE4) inhibitor roflumilast has exerted potent anti-inflammatory properties, this study evaluated if its intravenous delivery can influence inflammation, edema formation, and respiratory parameters in rabbits with a lavage-induced model of ALI. ALI was induced by repetitive saline lung lavage (30 ml/kg). Animals were divided into 3 groups: ALI without therapy (ALI), ALI treated with roflumilast i...
September 22, 2017: Physiological Research
https://www.readbyqxmd.com/read/28933795/microfluidic-production-of-nanoscale-perfluorocarbon-droplets-as-liquid-contrast-agents-for-ultrasound-imaging
#2
Xiaonan Xu, Ruyuan Song, Minghao He, Chuan Peng, Miao Yu, Youmin Hou, Huihe Qiu, Ruhai Zou, Shuhuai Yao
Liquid perfluorocarbon (PFC) nanodroplets may have a better chance to extravasate through inter-endothelial gaps (400-800 nm) into tumor interstitium for extravascular imaging, which holds promise as an innovative strategy for imaging-guided drug delivery, early diagnosis of cancer and minimally invasive treatment of cancer. Currently available emulsion technologies still face challenges in reducing droplet sizes from the microscale to the nanoscale. To control size and ensure monodispersity of PFC nanodroplets, we developed a flame-shaped glass capillary and polydimethylsiloxane (PDMS) hybrid device that creates a concentric flow of the dispersed phase enclosed by the focusing continuous phase at the cross-junction...
September 21, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28932732/sustained-released-mixture-of-vascular-endothelial-growth-factor-165-and-fibrin-glue-strengthens-healing-of-ileal-anastomoses-in-a-rabbit-model-with-intraperitoneal-infection
#3
Zhanwu Li, Wenjun Wang, Xiaozhou Wang, Lei Jiang, Fengyi Wang, Qiang Liu
PURPOSE: To investigate the effects of a sustained-released mixture of vascular endothelial growth factor 165 (VEGF165) and fibrin glue (FG) local administration on postoperative rabbit ileal anastomoses. METHODS: One hundred twenty-eight male and female New Zealand white rabbits underwent intraperitoneal infection subsequent ileal anastomosis surgery were divided randomly into 4 groups, including 32 animals in each, applied with saline solution, FG, rhVEGF165 and a mixture of rhVEGF165 with FG (VEGF + FG) on the anastomoses, respectively...
September 2017: Annals of Surgical Treatment and Research
https://www.readbyqxmd.com/read/28932571/management-of-pulmonary-hypertension-from-left-heart-disease-in-candidates-for-orthotopic-heart-transplantation
#4
REVIEW
Anna Koulova, Alan L Gass, Saikrishna Patibandla, Chhaya Aggarwal Gupta, Wilbert S Aronow, Gregg M Lanier
Pulmonary hypertension in left heart disease (PH-LHD) commonly complicates prolonged heart failure (HF). When advanced, the PH becomes fixed or out of proportion and is associated with increased morbidity and mortality in patients undergoing orthotopic heart transplant (OHT). To date, the only recommended treatment of out of proportion PH is the treatment of the underlying HF by reducing the pulmonary capillary wedge pressure (PCWP) with medications and often along with use of mechanical circulatory support...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28931780/association-between-severity-of-obstructive-sleep-apnea-and-glycated-hemoglobin-level-in-japanese-individuals-with-and-without-diabetes
#5
Hideaki Kurosawa, Yoshifumi Saisho, Koichi Fukunaga, Mizuha Haraguchi, Wakako Yamasawa, Isao Kurihara, Tomoko Betsuyaku, Hiroshi Itoh
Aim of this study was to examine the association between the severity of obstructive sleep apnea (OSA) and dysglycemia in Japanese individuals with and without type 2 diabetes (T2DM). We enrolled 115 individuals diagnosed with OSA with an apnea hypopnea-index (AHI) ≥ 20 in whom continuous positive airway pressure (CPAP) therapy was introduced (N = 115, 44 with T2DM, age 62 ± 11 years, BMI 27.0 ± 4.4 kg/m(2) and AHI median 36.1; interquartile range 27.2-48.1). During admission, the severity of OSA was evaluated by polysomnography, and its association with glycated hemoglobin (HbA1c) level was examined...
September 20, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28930815/variability-in-usual-care-mechanical-ventilation-for-pediatric-acute-respiratory-distress-syndrome-time-for-a-decision-support-protocol
#6
Christopher J L Newth, Katherine A Sward, Robinder G Khemani, Kent Page, Kathleen L Meert, Joseph A Carcillo, Thomas P Shanley, Frank W Moler, Murray M Pollack, Heidi J Dalton, David L Wessel, John T Berger, Robert A Berg, Rick E Harrison, Richard Holubkov, Allan Doctor, J Michael Dean, Tammara L Jenkins, Carol E Nicholson
OBJECTIVES: Although pediatric intensivists philosophically embrace lung protective ventilation for acute lung injury and acute respiratory distress syndrome, we hypothesized that ventilator management varies. We assessed ventilator management by evaluating changes to ventilator settings in response to blood gases, pulse oximetry, or end-tidal CO2. We also assessed the potential impact that a pediatric mechanical ventilation protocol adapted from National Heart Lung and Blood Institute acute respiratory distress syndrome network protocols could have on reducing variability by comparing actual changes in ventilator settings to those recommended by the protocol...
September 19, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28930153/selective-hdl-raising-human-apo-a-i-gene-therapy-counteracts-cardiac-hypertrophy-reduces-myocardial-fibrosis-and-improves-cardiac-function-in-mice-with-chronic-pressure-overload
#7
Ruhul Amin, Ilayaraja Muthuramu, Joseph Pierre Aboumsallem, Mudit Mishra, Frank Jacobs, Bart De Geest
Epidemiological studies support an independent inverse association between high-density lipoprotein (HDL) cholesterol levels and heart failure incidence. The effect of selective HDL-raising adeno-associated viral serotype 8-human apolipoprotein (apo) A-I (AAV8-A-I) gene transfer on cardiac remodeling induced by transverse aortic constriction (TAC) was evaluated in C57BL/6 low-density lipoprotein receptor-deficient mice. Septal wall thickness and cardiomyocyte cross-sectional area were reduced by 16.5% (p < 0...
September 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28923745/influence-of-magnetic-fields-on-calcium-carbonate-scaling-in-aqueous-solutions-at-150%C3%A2-c-and-1bar
#8
Ammar Al Helal, Adam Soames, Rolf Gubner, Stefan Iglauer, Ahmed Barifcani
The experiments performed as a part of this study were conducted to evaluate the effect of magnetic field treatment upon the scale forming tendency of brine solution composed primarily of calcium bicarbonate ions. The reported results were generated using a Dynamic Scale Loop system with the brine solution exposed to a magnetic field generated by a 6480 Gauss magnet of grade N45SH in a diametrical orientation for 2.5s. Following magnetic exposure, the brine solution was exposed to an elevated temperature 150°C at 1bar to promote the formation of scale within a capillary tube...
September 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28922923/interfacial-properties-and-mechanisms-dominating-gas-hydrate-cohesion-and-adhesion-in-liquid-and-vapor-hydrocarbon-phases
#9
Sijia Hu, Carolyn A Koh
The interfacial properties and mechanisms of gas hydrate systems play a major role in controlling their interparticle and surface interactions, which is desirable for nearly all energy applications of clathrate hydrates. In particular, preventing gas hydrate interparticle agglomeration and/or particle-surface deposition is critical to the prevention of gas hydrate blockages during the exploration and transportation of oil and gas subsea flowlines. These agglomeration and deposition processes are dominated by particle-particle cohesive forces and particle-surface adhesive force...
September 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28921743/exercise-training-dose-differentially-alters-muscle-and-heart-capillary-density-and-metabolic-functions-in-an-obese-rat-with-metabolic-syndrome
#10
Marcus Vinicius Machado, Aline Bomfim Vieira, Fabiana Gomes da Conceição, Alessandro Rodrigues Nascimento, Antonio Claudio Lucas da Nóbrega, Eduardo Tibirica
We evaluated the effect of frequency, duration and intensity of exercise training on metabolic parameters and structural capillary density in obese rats with metabolic syndrome (MS). Wistar-Kyoto rats were fed a either standard commercial diet (CON) or high-fat diet (HFD). Animals that received the HFD were randomly separated into either a sedentary (SED) group or 8 different exercise groups that varied by the frequency, duration and intensity of training. After 12 weeks of aerobic exercise training, body composition, aerobic capacity, hemodynamic variables, metabolic parameters and capillary density in the heart and skeletal muscle were evaluated...
September 17, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28919732/capillary-po2-does-not-adequately-reflect-arterial-po2-in-hypoxemic-copd-patients
#11
Friederike Sophie Magnet, Daniel Sebastian Majorski, Jens Callegari, Sarah Bettina Schwarz, Claudia Schmoor, Wolfram Windisch, Jan Hendrik Storre
PURPOSE: To compare arterial (PaO2) with capillary (PcO2) partial pressure of oxygen in hypoxemic COPD patients because capillary blood gas analysis (CBG) is increasingly being used as an alternative to arterial blood gas analysis (ABG) in a non-intensive care unit setting, although the agreement between PcO2 and PaO2 has not been evaluated in hypoxemic COPD patients. PATIENTS AND METHODS: Bland-Altman comparison of PaO2 and PcO2 served as the primary outcome parameter if PcO2 values were ≤60 mmHg and the secondary outcome parameter if PcO2 values were ≤55 mmHg...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28917599/enantiomeric-separation-of-some-chiral-analytes-using-amylose-3-5-dimethylphenylcarbamate-covalently-immobilized-on-silica-by-nano-liquid-chromatography-and-capillary-electrochromatography
#12
Giovanni D'Orazio, Chiara Fanali, Marina Karchkhadze, Bezhan Chankvetadze, Salvatore Fanali
A new experimental chiral stationary phase containing amylose 3,5-dimethylphenylcarbamate immobilized onto silica gel (i-ADMPC) was packed in 100μm I.D. fused silica capillary and used for the chiral separation of eight selected flavanone derivatives in polar organic mobile phase by using different miniaturized techniques, such as nano-liquid chromatography (nano-LC), capillary electrochromatography (CEC) and pressure-assisted CEC (pCEC). A comparative study of different elution modes in terms of chromatographic efficiency, analysis time and enantiomeric resolution was carried out...
September 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28917579/microcirculation-in-the-murine-liver-a-computational-fluid-dynamic-model-based-on-3d-reconstruction-from-in-vivo-microscopy
#13
Monica Piergiovanni, Elena Bianchi, Giada Capitani, Irene Li Piani, Lucia Ganzer, Luca G Guidotti, Matteo Iannacone, Gabriele Dubini
The liver is organized in hexagonal functional units - termed lobules - characterized by a rather peculiar blood microcirculation, due to the presence of a tangled network of capillaries - termed sinusoids. A better understanding of the hemodynamics that governs liver microcirculation is relevant to clinical and biological studies aimed at improving our management of liver diseases and transplantation. Herein, we built a CFD model of a 3D sinusoidal network, based on in vivo images of a physiological mouse liver obtained with a 2-photon microscope...
September 2, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28912260/decoupling-between-diastolic-pulmonary-artery-pressure-and-pulmonary-capillary-wedge-pressure-as-a-prognostic-factor-after-continuous-flow-ventricular-assist-device-implantation
#14
Teruhiko Imamura, Ben Chung, Ann Nguyen, Daniel Rodgers, Gabriel Sayer, Sirtaz Adatya, Nitasha Sarswat, Gene Kim, Jayant Raikhelkar, Takeyohi Ota, Tae Song, Colleen Juricek, Viktoriya Kagan, Valluvan Jeevanandam, Mandeep Mehra, Daniel Burkhoff, Nir Uriel
BACKGROUND: A cohort of heart failure (HF) patients receiving left ventricular assist devices (LVADs) has decoupling of their diastolic pulmonary artery pressure and pulmonary capillary wedge pressure. However, the clinical implications of this decoupling remain unclear. METHODS AND RESULTS: In this prospective study, patients with LVADs underwent routine invasive hemodynamic ramp testing with right heart catheterization, during which LVAD speeds were adjusted. Inappropriate decoupling was defined as a >5 mm Hg difference between diastolic pulmonary artery pressure and pulmonary capillary wedge pressure...
September 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28906564/use-of-monolithic-supports-for-high-throughput-protein-and-peptide-separation-in-proteomics
#15
REVIEW
Uroš Andjelković, Srdjan Tufegdžić, Milica Popović
The exclusive properties of monolithic supports enable fast mass transfer, high porosity, low back pressure, easy preparation process and miniaturisation and the availability of different chemistries make them particularly suitable materials for high-throughput (HTP) protein and peptide separation. In this review recent advances in monolith-based chromatographic supports for HTP screening of protein and peptide samples are presented and their application in HTP sample preparation (separation, enrichment, depletion, proteolytic digestion) for HTP proteomics is discussed...
September 14, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28894734/rugged-large-volume-injection-for-sensitive-capillary-lc-ms-environmental-monitoring
#16
Hanne Roberg-Larsen, Silvija Abele, Deniz Demir, Diana Dzabijeva, Sunniva F Amundsen, Steven R Wilson, Vadims Bartkevics, Elsa Lundanes
A rugged and high throughput capillary column (cLC) LC-MS switching platform using large volume injection and on-line automatic filtration and filter back-flush (AFFL) solid phase extraction (SPE) for analysis of environmental water samples with minimal sample preparation is presented. Although narrow columns and on-line sample preparation are used in the platform, high ruggedness is achieved e.g., injection of 100 non-filtrated water samples did not result in a pressure rise/clogging of the SPE/capillary columns (inner diameter 300 μm)...
2017: Frontiers in Chemistry
https://www.readbyqxmd.com/read/28890496/on-line-analysis-of-catalytic-reaction-products-using-a-high-pressure-tandem-micro-reactor-gc-ms
#17
Atsushi Watanabe, Young-Min Kim, Akihiko Hosaka, Chuichi Watanabe, Norio Teramae, Hajime Ohtani, Seungdo Kim, Young-Kwon Park, Kaige Wang, Robert R Freeman
When a GC/MS system is coupled with a pressurized reactor, the separation efficiency and the retention time are directly affected by the reactor pressure. To keep the GC column flow rate constant irrespective of the reaction pressure, a restrictor capillary tube and an open split interface are attached between the GC injection port and the head of a GC separation column. The capability of the attached modules is demonstrated for the on-line GC/MS analysis of catalytic reaction products of a bio-oil model sample (guaiacol), produced under a pressure of 1 to 3 MPa...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28890470/circulating-angptl2-levels-increase-in-humans-and-mice-exhibiting-cardiac-dysfunction
#18
Zhe Tian, Keishi Miyata, Jun Morinaga, Haruki Horiguchi, Tsuyoshi Kadomatsu, Motoyoshi Endo, Jiabin Zhao, Shunshun Zhu, Taichi Sugizaki, Michio Sato, Kazutoyo Terada, Takahiro Okumura, Toyoaki Murohara, Yuichi Oike
BACKGROUND: Recently, it was reported that angiopoietin-like protein 2 (ANGPTL2) secreted from a pathologically stressed heart accelerates cardiac dysfunction in an autocrine/paracrine manner, and that suppression of ANGPTL2 production in the heart restored cardiac function and myocardial energy metabolism, thereby blocking heart failure (HF) development. Interestingly, circulating ANGPTL2 concentrations reportedly increase in HF patients, suggesting a possible endocrine effect on cardiac dysfunction...
September 8, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28882340/an-automated-and-self-cleaning-nano-liquid-chromatography-mass-spectrometry-platform-featuring-an-open-tubular-multi-hole-crystal-fiber-solid-phase-extraction-column-and-an-open-tubular-separation-column
#19
Meire Ribeiro da Silva, Ole Kristian Brandtzaeg, Tore Vehus, Fernando Mauro Lanças, Steven Ray Wilson, Elsa Lundanes
An open tubular (OT) sample preparation/separation platform was developed. A multi-channel polymer layer open tubular (mPLOT) solid phase extraction (SPE) column was prepared by wall-coating the 126 channels (8μm inner diameter (ID) each) of a crystal fiber capillary with an organic polymer, namely poly(styrene-co-octadecene-co-divinylbenzene) (PS-OD-DVB). The mPLOT SPE was coupled on-line with a 10μm×2m poly(styrene-co-divinylbenzene) (PS-DVB) OT liquid chromatography column with nanospray mass spectrometry (OTLC-MS)...
August 30, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28873281/passive-picoinjection-enables-controlled-crystallization-in-a-droplet-microfluidic-device
#20
Shunbo Li, Muling Zeng, Thembaninkosi Gaule, Michael J McPherson, Fiona C Meldrum
Segmented flow microfluidic devices offer an attractive means of studying crystallization processes. However, while they are widely employed for protein crystallization, there are few examples of their use for sparingly soluble compounds due to problems with rapid device fouling and irreproducibility over longer run-times. This article presents a microfluidic device which overcomes these issues, as this is constructed around a novel design of "picoinjector" that facilitates direct injection into flowing droplets...
September 5, 2017: Small
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