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https://www.readbyqxmd.com/read/28933336/bioavailability-of-oxycodone-after-administration-of-a-new-prolonged-release-once-daily-tablet-formulation-in-healthy-subjects-in-comparison-to-an-established-twice-daily-tablet%C3%A2
#1
Bernhard Scheidel, Martina A Maritz, Yves J Gschwind, Kerstin Steigerwald, Volker Guth, Peter Kovacs, Helene Rey
OBJECTIVE: To evaluate and to compare the bioavailability, the influence of food intake on the bioavailability, and the safety and tolerability of a newly-developed oxycodone once-daily (OOD) prolonged-release tablet with an established oxycodone twice-daily (OTD) prolonged-release tablet after single-dose administration under fasting or fed conditions as well as after multiple-dose administration. MATERIALS AND METHODS: Three single-center, open-label, randomized, balanced, two-treatment, two-period, two-sequence crossover studies were conducted...
September 21, 2017: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28919740/low-toxic-maghemite-nanoparticles-for-theranostic-applications
#2
Elena A Kuchma, Peter V Zolotukhin, Anna A Belanova, Mikhail A Soldatov, Tatiana A Lastovina, Stanislav P Kubrin, Anatoliy V Nikolsky, Lidia I Mirmikova, Alexander V Soldatov
BACKGROUND: Iron oxide nanoparticles have numerous and versatile biological properties, ranging from direct and immediate biochemical effects to prolonged influences on tissues. Most applications have strict requirements with respect to the chemical and physical properties of such agents. Therefore, developing rational design methods of synthesis of iron oxide nanoparticles remains of vital importance in nanobiomedicine. METHODS: Low toxic superparamagnetic iron oxide nanoparticles (SPIONs) for theranostic applications in oncology having spherical shape and maghemite structure were produced using the fast microwave synthesis technique and were fully characterized by several complementary methods (transmission electron microscopy [TEM], X-ray diffraction [XRD], dynamic light scattering [DLS], X-ray photoelectron spectroscopy [XPS], X-ray absorption near edge structure [XANES], Mossbauer spectroscopy, and HeLa cells toxicity testing)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28916374/amp-activated-protein-kinase-protects-against-anoxia-in-drosophila-melanogaster
#3
Justin J Evans, Chengfeng Xiao, R Meldrum Robertson
During anoxia, proper energy maintenance is essential in order to maintain neural operation. Starvation activates AMP-activated protein kinase (AMPK), an evolutionarily conserved indicator of cellular energy status, in a cascade which modulates ATP production and consumption. We investigated the role of energetic status on anoxia tolerance in Drosophila and discovered that starvation or AMPK activation increases the speed of locomotor recovery from an anoxic coma. Using temporal and spatial genetic targeting we found that AMPK in the fat body contributes to starvation-induced fast locomotor recovery, whereas, under fed conditions, disrupting AMPK in oenocytes prolongs recovery...
September 12, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28915560/pharynx-mitochondrial-ca-2-dynamics-in-live-c-elegans-worms-during-aging
#4
Pilar Alvarez-Illera, Paloma García-Casas, Jessica Arias-Del-Val, Rosalba I Fonteriz, Javier Alvarez, Mayte Montero
Progressive decline in mitochondrial function is generally considered one of the hallmarks of aging. We have expressed a Ca(2+) sensor in the mitochondrial matrix of C. elegans pharynx cells and we have measured for the first time mitochondrial [Ca(2+)] ([Ca(2+)]M) dynamics in the pharynx of live C. elegans worms during aging. Our results show that worms stimulated with serotonin display a pharynx [Ca(2+)]M oscillatory kinetics that includes both high frequency oscillations (up to about 1Hz) and very prolonged "square-wave" [Ca(2+)]M increases, indicative of energy depletion of the pharynx cells...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28905628/impact-of-interfaces-and-laser-repetition-rate-on-photocarrier-dynamics-in-lead-halide-perovskites
#5
Liudmila G Kudriashova, David Kiermasch, Philipp Rieder, Marshall Campbell, Kristofer Tvingstedt, Andreas Baumann, Georgy V Astakhov, Vladimir Dyakonov
We studied charge carrier recombination in methylammonium lead iodide (MAPbI3) perovskite and the impact of interfaces on the charge carrier lifetime using time-resolved photoluminescence. Pristine films and those covered with organic electron and hole transport materials (TMs) were investigated at various laser repetition rates ranging from 10 kHz to 10 MHz in order to separate the bulk and interface-affected recombination. We revealed two different components in the PL decay. The fast component (shorter than 300 ns) is assigned to interfacial processes, and the slow one to bulk recombination...
September 14, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28900165/gcn5l1-modulates-cross-talk-between-mitochondria-and-cell-signaling-to-regulate-foxo1-stability-and-gluconeogenesis
#6
Lingdi Wang, Iain Scott, Lu Zhu, Kaiyuan Wu, Kim Han, Yong Chen, Marjan Gucek, Michael N Sack
The mitochondrial enriched GCN5-like 1 (GCN5L1) protein has been shown to modulate mitochondrial protein acetylation, mitochondrial content and mitochondrial retrograde signaling. Here we show that hepatic GCN5L1 ablation reduces fasting glucose levels and blunts hepatic gluconeogenesis without affecting systemic glucose tolerance. PEPCK and G6Pase transcript levels are downregulated in hepatocytes from GCN5L1 liver specific knockout mice and their upstream regulator, FoxO1 protein levels are decreased via proteasome-dependent degradation and via reactive oxygen species mediated ERK-1/2 phosphorylation...
September 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28887951/injectable-hyaluronan-methylcellulose-composite-hydrogel-crosslinked-by-polyethylene-glycol-for-central-nervous-system-tissue-engineering
#7
Fanlu Zhuo, Xujie Liu, Qin Gao, Ying Wang, Kun Hu, Qiang Cai
Spontaneous recovery ability of central nerves has inspired researchers to focus on tissue engineering techniques, especially scaffolds. To obtain a material with an appropriate degrading rate, an injectable composite hydrogel HAMC consisting of hyaluronic acid and methylcellulose was prepared using polyethylene glycol as a cross linker in this study. HAMC combined the advantages of two components to be fast-gelling, injectable, degradable, biocompatible, and it was able to meet some special shape requirement for injured tissue by in-situ forming...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28887578/-topical-antiseptic-agents
#8
P Staubach, S Melhorn
Topical therapy is an important domain in the treatment of dermatological diseases in the 21st century. Because multiresistant bacteria are becoming an increasing issue in medical care of chronic diseases, it is important to develop appropriate therapeutic management for acute and chronic dermatoses. The current discussion about the skin microbiota shows the importance of preserving the resident skin flora. There is a need for alternatives to topical antibiotics, e. g. topical antiseptics, which should be safe, fast, and effective but not allergenic or toxic...
September 8, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28873961/transcriptome-analysis-of-the-response-of-burmese-python-to-digestion
#9
Jinjie Duan, Kristian Wejse Sanggaard, Leif Schauser, Sanne Enok Lauridsen, Jan J Enghild, Mikkel Heide Schierup, Tobias Wang
Exceptional and extreme feeding behaviour makes the Burmese python (Python bivittatus) an interesting model to study physiological remodelling and metabolic adaptation in response to refeeding after prolonged starvation. In this study, we used transcriptome sequencing of 5 visceral organs during fasting as well as 24 hours and 48 hours after ingestion of a large meal to unravel the postprandial changes in Burmese pythons. We first used the pooled data to perform a de novo assembly of the transcriptome and supplemented this with a proteomic survey of enzymes in the plasma and gastric fluid...
August 1, 2017: GigaScience
https://www.readbyqxmd.com/read/28873424/dual-specificity-phosphatase-6-deficiency-is-associated-with-impaired-systemic-glucose-tolerance-and-reversible-weight-retardation-in-mice
#10
Katrin Pfuhlmann, Paul T Pfluger, Sonja C Schriever, Timo D Müller, Matthias H Tschöp, Kerstin Stemmer
Here, we aimed to investigate the potential role of DUSP6, a dual specificity phosphatase, that specifically inactivates extracellular signal-regulated kinase (ERK), for the regulation of body weight and glucose homeostasis. We further assessed whether metabolic challenges affect Dusp6 expression in selected brain areas or white adipose tissue. Hypothalamic Dusp6 mRNA levels remained unchanged in chow-fed lean vs. high fat diet (HFD) fed obese C57Bl/6J mice, and in C57Bl/6J mice undergoing prolonged fasting or refeeding with fat free diet (FFD) or HFD...
2017: PloS One
https://www.readbyqxmd.com/read/28871187/prolonged-fasting-elicits-increased-hepatic-triglyceride-accumulation-in-rats-born-to-dexamethasone-treated-mothers
#11
Lucas Carminatti Pantaleão, Gilson Murata, Caio Jordão Teixeira, Tanyara Baliani Payolla, Junia Carolina Santos-Silva, Daniella Esteves Duque-Guimaraes, Frhancielly S Sodré, Camilo Lellis-Santos, Juliana Camargo Vieira, Dailson Nogueira de Souza, Patrícia Rodrigues Gomes, Sandra Campos Rodrigues, Gabriel Forato Anhe, Silvana Bordin
We investigated the effect of dexamethasone during the last week of pregnancy on glucose and lipid metabolism in male offspring. Twelve-week old offspring were evaluated after fasting for 12-hours (physiological) and 60-hours (prolonged). Physiological fasting resulted in glucose intolerance, decreased glucose clearance after pyruvate load and increased PEPCK expression in rats born to dexamethasone-treated mothers (DEX). Prolonged fasting resulted in increased glucose tolerance and increased glucose clearance after pyruvate load in DEX...
September 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28870526/drug-repurposing-strategy-against-trypanosoma-cruzi-infection-in-vitro-and-in-vivo-assessment-of-the-activity-of-metronidazole-in-mono-and-combined-therapy
#12
M R Simões-Silva, J S De Araújo, G M Oliveira, K C Demarque, R B Peres, I D'Almeida-Melo, D G J Batista, C F Da Silva, C Cardoso-Santos, P B Da Silva, M M Batista, M T Bahia, M N C Soeiro
Metronidazole (Mtz) is a commercial broad-spectrum nitroimidazolic derivative with relevant antimicrobial activity and relative safety profile. Therefore, it is fair to consider Mtz a candidate for drug repurposing for other neglected conditions such as Chagas disease (CD), a parasitic pathology caused by Trypanosoma cruzi. CD is treated only with benznidazole (Bz) and nifurtimox, both introduced in clinics decades ago despite important limitations, including low efficacy on the later disease stage (chronic form) and severe side effects...
September 1, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28869822/potential-of-ghb-phase-ii-metabolites-to-complement-current-approaches-in-ghb-post-administration-detection
#13
Thomas Piper, Lena-Maria Mehling, Annika Spottke, Anna Heidbreder, Peter Young, Burkhard Madea, Cornelius Hess, Wilhelm Schänzer, Mario Thevis
Recently, phase-II-metabolites of γ-hydroxybutyric acid (GHB), namely GHB-β-O-glucuronide and GHB-4-sulfate, were implemented in the scope of drug testing methods The clearance of GHB from the circulation is extremely fast due to its incorporation into the metabolic pathway of the citrate cycle. The elimination half-life of GHB from blood was reported to be dose dependent between 30 and 50min resulting in narrow detection windows of less than 12h after illicit administration or cases of drug facilitated sexual assault regardless of the biological matrix used...
August 26, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28866764/l-type-calcium-channels-in-exocytosis-and-endocytosis-of-chromaffin-cells
#14
REVIEW
Carmen Nanclares, Andrés M Baraibar, Luis Gandía
The coexistence of different subtypes of voltage-dependent calcium channels (VDCC) within the same chromaffin cell (CC) and the marked interspecies variability in the proportion of VDCC subtypes that are present in the plasmalemma of the CCs raises the question on their roles in controlling different physiological functions. Particularly relevant seems to be the role of VDCCs in the regulation of the exocytotic neurotransmitter release process, and its tightly coupled membrane retrieval (endocytosis) process since both are Ca(2+)-dependent processes...
September 2, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28866139/impact-of-caloric-intake-in-critically-ill-patients-with-and-without-refeeding-syndrome-a-retrospective-study
#15
Laura E Olthof, W A C Kristine Koekkoek, Coralien van Setten, Johannes C N Kars, Dick van Blokland, Arthur R H van Zanten
BACKGROUND & AIMS: Refeeding syndrome comprises metabolic disturbances that occur after the reintroduction of feeding after prolonged fasting. Standard care consists of correcting fluid and electrolytes imbalances. Energy intake during refeeding syndrome is heavily debated. This study addresses the effect of caloric intake on outcome during the management of refeeding syndrome. METHODS: A retrospective study among critically ill invasive mechanically ventilated patients admitted for >7 days to a medical-surgical ICU...
August 10, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28862159/temporary-persistence-of-conduction-block-after-prolonged-kilohertz-frequency-alternating-current-khfac-on-rat-sciatic-nerve
#16
Narendra Bhadra, Emily Foldes, Tina Vrabec, Kevin L Kilgore, Niloy Bhadra
Application of Kilohertz Frequency Alternating Current (KHFAC) waveforms can result in nerve conduction block that is induced in less than a second. Conduction recovers within seconds when KHFAC is applied for about 5 - 10 minutes. This study investigated the effect of repeated and prolonged application of KHFAC on rat Sciatic nerve with bipolar platinum electrodes. Approach: Varying durations of KHFAC at signal amplitudes for conduction block with intervals of no stimulus were studied. Nerve conduction was monitored by recording peak Gastrocnemius muscle force utilizing stimulation electrodes proximal (PS) and distal (DS) to a blocking electrode...
September 1, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28860037/the-adult-foraging-assay-afa-detects-strain-and-food-deprivation-effects-in-feeding-related-traits-of-drosophila-melanogaster
#17
Bryon N Hughson, Ina Anreiter, Nicholas L Jackson Chornenki, Keith R Murphy, William W Ja, Robert Huber, Marla B Sokolowski
We introduce a high-resolution adult foraging assay (AFA) that relates pre- and post-ingestive walking behavior to individual instances of food consumption. We explore the utility of the AFA by taking advantage of established rover and sitter strains known to differ in a number of feeding-related traits. The AFA allows us to effectively distinguish locomotor behavior in Fed and Food-Deprived (FD) rover and sitter foragers. We found that rovers exhibit more exploratory behavior into the center of an arena containing sucrose drops compared to sitters who hug the edges of the arena and exhibit thigmotaxic behavior...
August 30, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28856238/reovirus-fast-protein-enhances-vesicular-stomatitis-virus-oncolytic-virotherapy-in-primary-and-metastatic-tumor-models
#18
Fabrice Le Boeuf, Simon Gebremeskel, Nichole McMullen, Han He, Anna L Greenshields, David W Hoskin, John C Bell, Brent Johnston, Chungen Pan, Roy Duncan
The reovirus fusion-associated small transmembrane (FAST) proteins are the smallest known viral fusogens (∼100-150 amino acids) and efficiently induce cell-cell fusion and syncytium formation in multiple cell types. Syncytium formation enhances cell-cell virus transmission and may also induce immunogenic cell death, a form of apoptosis that stimulates immune recognition of tumor cells. These properties suggest that FAST proteins might serve to enhance oncolytic virotherapy. The oncolytic activity of recombinant VSVΔM51 (an interferon-sensitive vesicular stomatitis virus [VSV] mutant) encoding the p14 FAST protein (VSV-p14) was compared with a similar construct encoding GFP (VSV-GFP) in cell culture and syngeneic BALB/c tumor models...
September 15, 2017: Molecular Therapy Oncolytics
https://www.readbyqxmd.com/read/28856114/total-intravenous-anesthesia-for-neurosurgical-procedures-in-narcoleptic-patients-two-case-reports
#19
Sara Pedrosa, Nuno Lareiro, Pedro Amorim
INTRODUCTION: Narcoleptic patients may be at increased risk of prolonged emergence, postoperative hypersomnia, apneic episodes, and sleep paralysis after general anesthesia. Modafinil is the first-line treatment, however, the implication it has on general anesthesia is not clear. This report present 2 cases of narcoleptic patients medicated with modafinil that were submitted to total intravenous anesthesia for neurosurgical procedures. CASE PRESENTATION: Informed consent was obtained from both patients...
June 2017: Anesthesiology and Pain Medicine
https://www.readbyqxmd.com/read/28853043/comparative-evaluation-of-18-f-flt-and-18-f-fdg-for-detecting-cardiac-and-extra-cardiac-thoracic-involvement-in-patients-with-newly-diagnosed-sarcoidosis
#20
Takashi Norikane, Yuka Yamamoto, Yukito Maeda, Takahisa Noma, Hiroaki Dobashi, Yoshihiro Nishiyama
BACKGROUND: (18)F-FDG PET has been used in sarcoidosis for diagnosis and determination of the extent of the disease. However, assessing inflammatory lesions in cardiac sarcoidosis using (18)F-FDG can be challenging because it accumulates physiologically in normal myocardium. Another radiotracer, 3'-deoxy-3'-(18)F-fluorothymidine ((18)F-FLT), has been investigated as a promising PET tracer for evaluating tumor proliferative activity. In contrast to (18)F-FDG, (18)F-FLT uptake in the normal myocardium is low...
August 29, 2017: EJNMMI Research
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