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https://www.readbyqxmd.com/read/28749189/improved-oral-bioavailability-for-lutein-by-nanocrystal-technology-formulation-development-in-vitro-and-in-vivo-evaluation
#1
Daoxiao Chang, Yanni Ma, Guoyu Cao, Jianhuan Wang, Xia Zhang, Jun Feng, Wenping Wang
Lutein is a kind of natural carotenoids possessing many pharmacological effects. The application of lutein was limited mainly due to its low oral bioavailability caused by poor aqueous solubility. Nanocrystal formulation of lutein was developed to improve the oral bioavailability in this study. The nanosuspension was prepared by the anti-solvent precipitation-ultrasonication method and optimized by Box-Behnken design, followed by freeze-drying to obtain lutein nanocrystals. The nanocrystals were characterized on their physical properties, in vitro dissolution and in vivo absorption performance...
July 27, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28749173/assessment-of-sacroiliitis-for-the-diagnosis-of-spondyloarthropathy-fat-saturated-t2-weighted-imaging-with-stir-versus-fat-saturated-contrast-enhanced-t1-weighted-imaging
#2
Siyoun Sung, Hyun Su Kim, Jong Won Kwon
OBJECTIVES: To evaluate whether there is significant differences between contrastenhanced fat-saturated T1-weighted imaging and non-enhanced fat-suppression imaging for diagnosing sacroiliitis in patients with inflammatory back pain. METHODS: Ninety-two patients, consisting of 46 men and 46 women (mean age: 34 years; range: 15-63 years), who met at least four out of five Assessment in SpondyloArthritis international Society (ASAS) criteria for inflammatory low back pain were enrolled in this study...
July 27, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28748874/variables-affecting-darbepoetin-resistance-index-in-hemodialysis-patients
#3
Fayez Hejaili, Ehtsham Hafeez, Burhan Bhutto, Lulwa Al Turki, Abdul Kareem Alsuwida, Hammad Raza, Abdulla Al-Sayyari
Erythropoietin resistance index calculation has been used as a tool to evaluate anemia response to erythropoietin therapy. Very little has been reported in its use when using darbepoetin and factors influencing in Arab patients. Darbepoetin resistance index (DRI) was calculated in all our patients using darbepoetin. This was correlated to demographic, clinical, and laboratory parameters. Of the 250 patients, 40.4% were diabetic, 71.1% on hemodialysis, and 28.6% on hemodiafiltration), 23.9% with PermCaths (PC), and 76...
July 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28748626/combining-bottom-up-and-top-down-approaches-to-assess-the-impact-of-food-and-gastric-ph-on-pictilisib-gdc-0941-pharmacokinetics
#4
Tong Lu, Grazyna Fraczkiewicz, Laurent Salphati, Nageshwar Budha, Gena Dalziel, Gillian S Smelick, Kari M Morrissey, John D Davis, Jin Y Jin, Joseph A Ware
Pictilisib, a weakly basic compound, is an orally administered, potent, and selective pan-inhibitor of phosphatidylinositol 3-kinases for oncology indications. To investigate the significance of high-fat food and gastric pH on pictilisib pharmacokinetics (PK) and enable label recommendations, a dedicated clinical study was conducted in healthy volunteers, whereby both top-down [Population PK, (PopPK)] and bottom-up [physiologically-based PK, (PBPK)] approaches were applied to enhance confidence of recommendation and facilitate the clinical development through scenario simulations...
July 27, 2017: CPT: Pharmacometrics & Systems Pharmacology
https://www.readbyqxmd.com/read/28748625/multiple-risk-factor-counseling-to-promote-heart-healthy-lifestyles-in-the-chest-pain-observation-unit-pilot-randomized-controlled-trial
#5
David A Katz, Mark Graber, Patricia Lounsbury, Mark W Vander Weg, Emily K Phillips, Christina Clair, Phillip A Horwitz, Xueya Cai, Alan J Christensen
OBJECTIVE: Admission to the chest pain observation unit (CPOU) may be an advantageous time for patients to consider heart-healthy lifestyle changes while undergoing diagnostic evaluation to rule out myocardial ischemia. The aim of this pragmatic trial was to assess the effectiveness of a multiple risk factor intervention in changing CPOU patients' health beliefs and readiness to change health behaviors. A secondary aim was to obtain preliminary estimates of the intervention's effect on diet, physical activity, and smoking...
July 27, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/28747812/numerical-analysis-of-the-influence-of-low-frequency-vibration-on-bubble-growth
#6
D Han, Mark A Kedzierski
Numerical simulation of bubble growth during pool boiling under the influence of low frequency vibration was performed to understand the influence of common vibrations such as those induced by wind, highway transportation, and nearby mechanical devices on the performance of thermal systems that rely on boiling. The simulations were done for saturated R123 boiling at 277.6 K with a 15 K wall superheat. The numerical volume-of-fluid method (fixed grid) was used to define the liquid-vapor interface. The basic bubble growth characteristics including the bubble departure diameter and the bubble departure time were determined as a function of the bubble contact angle (20°-80°), the vibration displacement (10 µm-50 µm), the vibration frequency (5 Hz-25 Hz), and the initial vibration direction (positive or negative)...
2017: International Journal of Transport Phenomena
https://www.readbyqxmd.com/read/28747787/hydro-dynamic-solute-transport-under-two-phase-flow-conditions
#7
Nikolaos K Karadimitriou, Vahid Joekar-Niasar, Omar Godinez Brizuela
There are abundant examples of natural, engineering and industrial applications, in which "solute transport" and "mixing" in porous media occur under multiphase flow conditions. Current state-of-the-art understanding and modelling of such processes are established based on flawed and non-representative models. Moreover, there is no direct experimental result to show the true hydrodynamics of transport and mixing under multiphase flow conditions while the saturation topology is being kept constant for a number of flow rates...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747629/clownfish-in-hypoxic-anemones-replenish-host-o2-at-only-localised-scales
#8
N A Herbert, S Bröhl, K Springer, A Kunzmann
The clownfish-anemone association exemplifies a symbiosis where both members benefit from nutrient exchange and protection from predators. Clownfish also perform aeration-like behaviour in their host anemones at night, but it is not yet known whether this is stimulated by the onset of hypoxia, and whether both members benefit from O2 replenishment. Oxygen at 3 distances above the sea anemone Entacmaea quadricolor (0.2, 1.2 and 2.2 cm) therefore was measured under 3 light levels (photon flux density = 0, 55 and 110 µmol m(-2) s(-1)), with and without the anemonefish Amphiprion frenatus...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747530/sequence-intrinsic-somatic-mutation-mechanisms-contribute-to-affinity-maturation-of-vrc01-class-hiv-1-broadly-neutralizing-antibodies
#9
Joyce K Hwang, Chong Wang, Zhou Du, Robin M Meyers, Thomas B Kepler, Donna Neuberg, Peter D Kwong, John R Mascola, M Gordon Joyce, Mattia Bonsignori, Barton F Haynes, Leng-Siew Yeap, Frederick W Alt
Variable regions of Ig chains provide the antigen recognition portion of B-cell receptors and derivative antibodies. Ig heavy-chain variable region exons are assembled developmentally from V, D, J gene segments. Each variable region contains three antigen-contacting complementarity-determining regions (CDRs), with CDR1 and CDR2 encoded by the V segment and CDR3 encoded by the V(D)J junction region. Antigen-stimulated germinal center (GC) B cells undergo somatic hypermutation (SHM) of V(D)J exons followed by selection for SHMs that increase antigen-binding affinity...
July 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28747364/cerebral-oxygenation-during-skin-to-skin-care-in-preterm-infants-not-receiving-respiratory-support
#10
Laila Lorenz, Adriana Marulli, Jennifer A Dawson, Louise S Owen, Brett J Manley, Susan M Donath, Peter G Davis, C Omar F Kamlin
OBJECTIVE: Skin-to-skin care (SSC) has proven benefits in preterm infants, but increased hypoxic and bradycardic events have been reported. This may make clinicians hesitant to recommend SSC as standard care. We hypothesised that regional cerebral oxygenation (rStO2) measured with near infrared spectroscopy is not worse during SSC compared with standard incubator care. DESIGN: Prospective, observational, non-inferiority study. SETTING: Single tertiary perinatal centre in Australia...
July 26, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28747363/changes-in-cardiac-output-and-cerebral-oxygenation-during-prone-and-supine-sleep-positioning-in-healthy-term-infants
#11
Tai-Wei Wu, Rey-In Lien, Istvan Seri, Shahab Noori
OBJECTIVE: To investigate the changes in systemic and cerebral haemodynamics between supine and prone sleep in healthy term infants during the early postnatal period. DESIGN/METHODS: Healthy term infants without congenital anomalies, patent ductus arteriosus and/or small for gestational age status were enrolled. Infants were placed in supine (SP1), prone (PP) and back in supine (SP2) position for 15 min each while asleep. Cardiac output (CO) and stroke volume (SV) were assessed by electrical velocimetry (EV) and echocardiography (echo), and cerebral regional oxygen saturation (CrSO2) in the frontal lobes was monitored by near-infrared spectroscopy...
July 26, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28747155/indole-3-acetic-acid-indoxyl-sulfate-and-paracresyl-sulfate-do-not-influence-anemia-parameters-in-hemodialysis-patients
#12
Stanislas Bataille, Marion Pelletier, Marion Sallée, Yvon Berland, Nathalie McKay, Ariane Duval, Stéphanie Gentile, Yosra Mouelhi, Philippe Brunet, Stéphane Burtey
BACKGROUND: The main reason for anemia in renal failure patients is the insufficient erythropoietin production by the kidneys. Beside erythropoietin deficiency, in vitro studies have incriminated uremic toxins in the pathophysiology of anemia but clinical data are sparse. In order to assess if indole 3-acetic acid (IAA), indoxyl sulfate (IS), and paracresyl sulfate (PCS) -three protein bound uremic toxins- are clinically implicated in end-stage renal disease anemia we studied the correlation between IAA, IS and PCS plasmatic concentrations with hemoglobin and Erythropoietin Stimulating Agents (ESA) use in hemodialysis patients...
July 26, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28746744/enzyme-responsive-lipocest-agents-assessment-of-mmp-2-activity-by-measuring-the-intra-liposomal-water-1h-nmr-resonance-shift
#13
Giuseppe Ferrauto, Enza Di Gregorio, Marta Ruzza, Valeria Catanzaro, Sergio Padovan, Silvio Aime
Mobile proton containing solutes can be detected by MRI via Chemical Exchange Saturation Transfer(CEST)method. The CEST sensitivity is dramatically enhanced by using, as exchanging protons, the water molecules confined inside liposomes, properly shifted by a paramagnetic Shift Reagent. The chemical shift of the intraliposomal water resonance(δIL) is affected by the overall shape of the supramolecular system. Herein, it is shown that δIL of a spherical LipoCEST acts as a sensitive reporter of the distribution of Streptavidin proteins anchored at the Liposomes'surface by biotinylated phospholipids...
July 26, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28746527/sleep-disordered-breathing-in-patients-with-copd-and-mild-hypoxemia-prevalence-and-predictive-variables
#14
José Laerte Rodrigues Silva, Marcus Barreto Conde, Krislainy de Sousa Corrêa, Helena Rabahi, Arthur Alves Rocha, Marcelo Fouad Rabahi
Objective: To infer the prevalence and variables predictive of isolated nocturnal hypoxemia and obstructive sleep apnea (OSA) in patients with COPD and mild hypoxemia. Methods: This was a cross-sectional study involving clinically stable COPD outpatients with mild hypoxemia (oxygen saturation = 90-94%) at a clinical center specializing in respiratory diseases, located in the city of Goiânia, Brazil. The patients underwent clinical evaluation, spirometry, polysomnography, echocardiography, arterial blood gas analysis, six-minute walk test assessment, and chest X-ray...
May 2017: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
https://www.readbyqxmd.com/read/28746470/relationship-between-ventilation-heterogeneity-and-exercise-intolerance-in-adults-with-sickle-cell-anemia
#15
A J Lopes, C L Marinho, U D Alves, C E A Gonçalves, P O Silva, E C Botelho, R Bedirian, A R Soares, M C P Maioli
Sickle cell anemia (SCA) causes dysfunction of multiple organs, with pulmonary involvement as a major cause of mortality. Recently, there has been growing interest in the nitrogen single-breath washout (N2SBW) test, which is able to detect ventilation heterogeneity and small airway disease when the results of other pulmonary function tests (PFTs) are still normal. Thus, the objectives of the present study were to assess the heterogeneity in the ventilation distribution in adults with SCA and to determine the association between the ventilation distribution and the clinical, cardiovascular, and radiological findings...
July 20, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28746358/-i-can-t-get-no-saturation-a-simulation-and-guidelines-for-sample-sizes-in-qualitative-research
#16
Frank J van Rijnsoever
I explore the sample size in qualitative research that is required to reach theoretical saturation. I conceptualize a population as consisting of sub-populations that contain different types of information sources that hold a number of codes. Theoretical saturation is reached after all the codes in the population have been observed once in the sample. I delineate three different scenarios to sample information sources: "random chance," which is based on probability sampling, "minimal information," which yields at least one new code per sampling step, and "maximum information," which yields the largest number of new codes per sampling step...
2017: PloS One
https://www.readbyqxmd.com/read/28746357/microbubble-based-enhancement-of-radiation-effect-role-of-cell-membrane-ceramide-metabolism
#17
Azza Al-Mahrouki, Anoja Giles, Amr Hashim, Hyunjung Christina Kim, Ahmad El-Falou, Dean Rowe-Magnus, Golnaz Farhat, Gregory J Czarnota
Ultrasound (US) stimulated microbubbles (MB) is a new treatment approach that sensitizes cancer cells to radiation (XRT). The molecular pathways in this response remain unelucidated, however, previous data has supported a role for cell membrane-metabolism related pathways including an up regulation of UDP glycosyltransferase 8 (UGT8), which catalyzes the transfer of galactose to ceramide, a lipid that is associated with the induction of apoptotic signalling. In this study, the role of UGT8 in responses of prostate tumours to ultrasound-stimulated microbubble radiation enhancement therapy is investigated...
2017: PloS One
https://www.readbyqxmd.com/read/28746349/new-insights-on-the-regulation-of-the-adenine-nucleotide-pool-of-erythrocytes-in-mouse-models
#18
William G O'Brien, Han Shawn Ling, Zhaoyang Zhao, Cheng Chi Lee
The observation that induced torpor in non-hibernating mammals could result from an increased AMP concentration in circulation led our investigation to reveal that the added AMP altered oxygen transport of erythrocytes. To further study the effect of AMP in regulation of erythrocyte function and systemic metabolism, we generated mouse models deficient in key erythrocyte enzymes in AMP metabolism. We have previously reported altered erythrocyte adenine nucleotide levels corresponding to altered oxygen saturation in mice deficient in both CD73 and AMPD3...
2017: PloS One
https://www.readbyqxmd.com/read/28745788/the-application-value-of-continuous-nursing-for-home-oxygen-therapy-of-patients-in-the-stable-phase-of-chronic-obstructive-pulmonary-disease
#19
Y-L Yu, X-S Zheng, X-X Han, M-J Sun
OBJECTIVE: To analyze the application value of continuous nursing in improving the effects of home oxygen therapy for patients in the stable phase of chronic obstructive pulmonary disease (COPD). PATIENTS AND METHODS: Patients in the stable phase of COPD (n=106) were selected and divided into the control group and observation group based on parity digit of their admission number. There were 53 cases in each group. The patients in the control group received COPD health education at discharge, while the observation group received continuous nursing...
July 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28745688/-risk-factors-for-anemia-in-the-early-stages-of-chronic-kidney-disease
#20
Yu S Milovanov, L V Kozlovskaya, L Yu Milovanova, M M Markina, V V Kozlov, M V Taranova, V V Fomin
AIM: To identify the early markers of anemia in chronic kidney disease (CKD) in patients with chronic glomerulonephritis (CGN) and glomerulonephritis (GN) in systemic diseases. SUBJECTS AND METHODS: Seventy-nine patients with some male preponderance who were aged 21 to 65 years (45.3±11.1 years) and had CKD (CGN and GN) in systemic diseases (systemic lupus erythematosus and Wegener's granulomatosis) in the early stages (Stages I-II) of CKD were examined. GN was diagnosed by a lifetime renal biopsy...
2017: Terapevticheskiĭ Arkhiv
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