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https://www.readbyqxmd.com/read/29236801/effect-of-atenolol-pre-treatment-in-heart-damage-in-a-model-of-intestinal-ischemia-reperfusion
#1
Mieko Okada, Luiz Fernando Reis Falcão, David Ferez, José Luiz Martins, Paolo Ruggero Errante, Francisco Sandro Menezes Rodrigues, Afonso Caricati-Neto, Márcia Marinho, Guilherme Fenelon, Itamar Souza
PURPOSE: To investigate the effects of atenolol in inflammatory mediator and oxidative stress in a myocardial injury by intestinal ischemia/reperfusion in rat model. METHODS: Adult Wistar male rats were randomly (n=8), anesthetized and divided in: Sham: submitted to operation only; group SS+IR: intravenous saline infusion following superior mesenteric artery occlusion during 60 minutes (ischemia) and open for 120 minutes (reperfusion); group AT+IR: intravenous atenolol infusion (2 mg/kg) following superior mesenteric artery occlusion during 60 minutes (ischemia) and open for 120 minutes (reperfusion); and group AT+I+AT+R: intravenous atenolol infusion following superior mesenteric artery occlusion during 60 minutes (ischemia) and in the time 45 minutes other atenolol doses were administrated and the artery was open for 120 minutes (reperfusion), all animals were submitted to muscular relaxation for mechanical ventilation...
November 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29235993/raman-micro-spectroscopy-analysis-of-human-lens-epithelial-cells-exposed-to-a-low-dose-range-of-ionizing-radiation
#2
Christian Harry Allen, Achint Kumar, Sami Qutob, Balazs J Nyiri, Vinita Chauhan, Sangeeta Murugkar
Recent findings in populations exposed to ionizing radiation (IR) indicate dose-related lens opacification occurs at much lower doses (< 2Gy) than indicated in radiation protection guidelines. As a result, research efforts are now being directed towards identifying early predictors of lens degeneration resulting in cataractogenesis. In this study, Raman micro-spectroscopy was used to investigate the effects of varying doses of radiation, ranging from 0.01 Gy to 5 Gy, on human lens epithelial (HLE) cells which were chemically fixed 24 hrs post-irradiation...
December 13, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29235447/electrical-conductivity-of-in2o3-and-ga2o3-after-low-temperature-ion-irradiation-implications-for-instrinsic-defect-formation-and-charge-neutrality-level
#3
L Vines, C Bhoodoo, H von Wenckstern, M Grundmann
The evolution of sheet resistance of n-type In2O3 and Ga2O3 exposed to bombardment with MeV 12C and 28Si ions at 35 K is studied in situ. While the sheet resistance of Ga2O3 increased by more than eight orders of magnitude as a result of ion irradiation, In2O3 showed a more complex defect evolution and became more conductive when irradiated at the highest doses. Heating up to room temperature reduced the sheet resistivity somewhat, but Ga2O3 remained highly resistive, while In2O3 showed a lower resistance than as deposited samples...
December 13, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29227461/population-pharmacokinetics-of-lopinavir-in-severely-malnourished-hiv-infected-children-and-the-effect-on-treatment-outcomes
#4
Moherndran Archary, Helen Mcllleron, Raziya Bobat, Phillip La Russa, Thobekile Sibaya, Lubbe Wiesner, Stefanie Hennig
BACKGROUND: In developing countries, malnutrition remains a common clinical syndrome at antiretroviral treatment (ART) initiation. Physiological changes due to malnutrition and during nutritional recovery could affect the pharmacokinetics of antiretroviral drugs. METHODS: HIV-infected children admitted with severe acute malnutrition were randomised to early or delayed initiation of lopinavir/ritonavir, abacavir and lamivudine using WHO weight-band dosage charts...
December 8, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29214053/severe-carvedilol-toxicity-without-overdose-caution-in-cirrhosis
#5
Satish Maharaj, Karan Seegobin, Julio Perez-Downes, Belinda Bajric, Simone Chang, Pramod Reddy
Background: Carvedilol is used in the management of hypertension, ischemic heart disease, heart failure and most recently, portal hypertension. It has been associated with improved outcomes regarding variceal bleeding, hepatic decompensation and death when compared to propranolol and endoscopic band ligation. The main cause of portal hypertension is cirrhosis and therefore carvedilol is increasingly used in these patients. Due to its extensive hepatic metabolism, carvedilol is contraindicated in severe hepatic impairment...
2017: Clinical Hypertension
https://www.readbyqxmd.com/read/29208539/trichoderma-based-synthesis-of-anti-pathogenic-silver-nanoparticles-and-their-characterization-antioxidant-and-cytotoxicity-properties
#6
Kandasamy Saravanakumar, Myeong-Hyeon Wang
Antibacterial silver nanoparticles (AgNPs) are synthesized from various biological resources, but studies on Trichoderma-based synthesis are limited. Hence, the current work synthesized antibacterial silver nanoparticles using Trichoderma atroviride and also tested for their biomedical properties. AgNPs synthesis was confirmed by the occurrence of plasmon resonance at 390-400 nm in the UV-vis spectrum. FTIR spectrum displayed the bands at 1115.4 and 3450 cm-1 indicating the vibrations of the metallic oxides...
December 2, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29207247/surface-micro-patterning-of-uniaxially-oriented-polyethylene-films-using-interference-holography-for-strain-sensors
#7
Lihua Shen, Sarah S D Lafleur, Simon J A Houben, Jeffrey N Murphy, John R Severn, Cees W M Bastiaansen
A new procedure is presented for direct generation of surface micro-patterns on uniaxially oriented polyethylene (PE) films using interference holography with a nanosecond pulsed laser. An ultraviolet absorber, 2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol (BZT) is incorporated into PE prior to stretching to generate absorption at the wavelength of the laser. Illumination with an interference pattern in the absorption band of BZT leads to an obvious height variation in the exposed regions and consequently relief gratings are generated...
December 5, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29206748/pharmacokinetics-and-pharmacodynamics-of-atazanavir-in-hiv-1-infected-children-treated-with-atazanavir-powder-and-ritonavir-combined-analysis-of-the-prince-1-and-2-studies
#8
Heather Sevinsky, Luna Zaru, Reena Wang, Xiaohui Xu, Cheryl Pikora, Todd A Correll, Timothy Eley
BACKGROUND: Two clinical studies (PRINCE-1 and -2) in HIV-1-infected children assessed the safety, efficacy, and pharmacokinetics of dual nucleos(t)ide reverse transcriptase inhibitor (NRTI) background therapy plus once-daily atazanavir powder formulation boosted with ritonavir (ATV+RTV). Here, we present a combined analysis of ATV pharmacokinetics and pharmacodynamics across these studies. METHODS: Intensive 24-hour pharmacokinetic profiles at steady state compared ATV exposures (area under the concentration-time curve in one dosing interval [AUCτ]) in 5 ATV+RTV baseline weight-band dosing categories with historic data in adults receiving ATV+RTV 300/100-mg capsules...
December 4, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29205937/experience-with-an-abdominal-compression-band-for-radiotherapy-of-upper-abdominal-tumours
#9
Rebecca Van Gelder, Shelley Wong, Andrew Le, Alexander Podreka, Adam Briggs, Carol Haddad, Nicholas Hardcastle
INTRODUCTION: Radiotherapy outcomes are influenced by treatment delivery geometric accuracy and organ-at-risk dose. The location of abdominal structures such as the liver, kidneys and tumour volumes can be strongly influenced by respiratory motion. This increases geometric uncertainty and dose to organs-at-risk. One common method of minimising respiratory motion is abdominal compression (AC). METHODS: Fifteen patients being treated for radiotherapy to upper abdominal tumours were analysed...
December 5, 2017: Journal of Medical Radiation Sciences
https://www.readbyqxmd.com/read/29201996/a-randomized-exploratory-molecular-imaging-study-targeting-amyloid-%C3%AE-with-a-novel-8-oh-quinoline-in-alzheimer-s-disease-the-pbt2-204-imagine-study
#10
Victor L Villemagne, Christopher C Rowe, Kevin J Barnham, Robert Cherny, Michael Woodward, Svetlana Bozinosvski, Olivier Salvado, Pierrick Bourgeat, Keyla Perez, Christopher Fowler, Alan Rembach, Paul Maruff, Craig Ritchie, Rudy Tanzi, Colin L Masters
Introduction: We are developing a second generation 8-OH quinoline (2-(dimethylamino) methyl-5, 7-dichloro-8-hydroxyquinoline [PBT2, Prana Biotechnology]) for targeting amyloid β (Aβ) in Alzheimer's disease (AD). In an earlier phase IIa, 3 month trial, PBT2 lowered cerebrospinal fluid Aβ by 13% and improved cognition (executive function) in a dose-related fashion in early AD. We, therefore, sought to learn whether PBT2 could alter the Aβ-PET signal in subjects with prodromal or mild AD, in an exploratory randomized study over a 12-month phase in a double-blind and a 12-month open label extension phase trial design...
November 2017: Alzheimer's & Dementia: Translational Research & Clinical Interventions
https://www.readbyqxmd.com/read/29197868/the-dual-carboxymethyl-cellulase-and-gelatinase-activities-of-a-newly-isolated-protein-from-brevibacillus-agri-st15c10-confer-reciprocal-regulations-in-substrate-utilization
#11
Smarajit Maiti, Tanmoy Samanta, Sumit Sahoo, Sudipta Roy
A protein showing endoglucanase-peptidase activity was prepared from a newly isolated bacterium (ST15c10). We identified ST15c10 as Brevibacillus agri based on electron-microscopic images and its 16S-rDNA sequence (GenBank accession No. HM446043), which exhibits 98.9% sequence identity to B. agri (KZ17)/B. formosus (DSM-9885T)/B. brevis. The enzyme was purified to homogeneity and gave a single peak during high-performance liquid chromatography on a Seralose 6B-150 gel-matrix/C-18 column. MALDI-TOF mass-spectrometry and bioinformatics studies revealed significant similarity to M42-aminopeptidases/endoglucanases of the CelM family...
December 2, 2017: Journal of Molecular Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29197031/preclinical-evaluation-of-the-aurora-kinase-inhibitors-amg-900-azd1152-hqpa-and-mk-5108-on-sw-872-and-93t449-human-liposarcoma-cells
#12
Sandhya Noronha, Lauren A C Alt, Taylor E Scimeca, Omran Zarou, Justyna Obrzut, Brian Zanotti, Elizabeth A Hayward, Akhil Pillai, Shubha Mathur, Joseph Rojas, Ribhi Salamah, Nalini Chandar, Michael J Fay
Liposarcoma is a malignant soft tissue tumor that originates from adipose tissue and is one of the most frequently diagnosed soft tissue sarcomas in humans. There is great interest in identifying novel chemotherapeutic options for treating liposarcoma based upon molecular alterations in the cancer cells. The Aurora kinases have been identified as promising chemotherapeutic targets based on their altered expression in many human cancers and cellular roles in mitosis and cytokinesis. In this study, we investigated the effects of an Aurora kinase A inhibitor (MK-5108), an Aurora kinase B inhibitor (AZD1152-HQPA), and a pan-Aurora kinase inhibitor (AMG 900) on undifferentiated SW-872 and well-differentiated 93T449 human liposarcoma cells...
December 1, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/29190329/cortical-phase-amplitude-coupling-in-a-progressive-model-of-parkinsonism-in-nonhuman-primates
#13
Annaelle Devergnas, M Caiola, D Pittard, T Wichmann
Parkinson's disease is associated with abnormal oscillatory electrical activities of neurons and neuronal ensembles throughout the basal ganglia-thalamocortical network. It has recently been documented in patients with advanced parkinsonism that the amplitude of gamma-band oscillations (50-200 Hz) in electrocorticogram recordings from the primary motor cortex is abnormally coupled to the phase of beta band oscillations within the same signals. It is not known when in the course of the disease the abnormal phase-amplitude coupling (PAC) arises, and whether it is influenced by arousal or prior exposure to dopaminergic medications...
November 28, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29188827/supramolecular-organization-of-a-h-bonded-perylene-bisimide-organogelator-determined-by-transmission-electron-microscopy-grazing-incidence-x-ray-diffraction-and-polarized-infra-red-spectroscopy
#14
Alexandru Sarbu, Patrick Hermet, David Maurin, David Djurado, Laure Biniek, Morgane Diebold, Jean-Louis Bantignies, Philippe Mésini, Martin Brinkmann
An organogelator based on a N,N'-substituted H-bonding perylenebisimide (PBI-C10) self-assembles to form either a green J-type (form I) or a red H-type (form II) aggregate structure. The molecular packing of both polymorphs was determined from a combination of Transmission Electron Microscopy (TEM) (low dose electron diffraction and high resolution), Grazing incidence X-ray diffraction and polarized infrared spectroscopy. To that aim, highly oriented films have been prepared by mechanical rubbing at controlled film temperature and DFT calculations were performed to identify representative vibrational IR bands and their associated polarizations...
November 30, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29185996/electrical-conductivity-of-in-sub-2-sub-o-sub-3-sub-and-ga-sub-2-sub-o-sub-3-sub-after-low-temperature-ion-irradiation-implications-for-instrinsic-defect-formation-and-charge-neutrality-level
#15
Lasse Vines, Chidanand Bhoodoo, Holger von Wenckstern, Marius Grundmann
The evolution of sheet resistance of n-type In2O3 and Ga2O3 exposed to bombardment with MeV 12C and 28Si ions at 35 K is studied in situ. While the sheet resistance of Ga2O3 increased by more than 8 orders of magnitude as a result of ion irradiation, In2O3 showed a more complex defect evolution and became more conductive when irradiated at the highest doses. Heating up to room temperature reduced the sheet resistivity somewhat, but Ga2O3 remained highly resistive, while In2O3 showed a lower resistance than as deposited samples...
November 29, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29182715/modulation-of-rat-50-khz-ultrasonic-vocalizations-by-glucocorticoid-signaling-possible-relevance-to-reward-and-motivation
#16
Nicola Simola, Elena Paci, Marcello Serra, Giulia Costa, Micaela Morelli
Background: Rats emit 50-kHz ultrasonic vocalizations (USVs) to communicate positive emotional states, and these USVs are increasingly being investigated in preclinical studies on reward and motivation. Although it is the activation of dopamine receptors that initiates the emission of 50-kHz USVs, non-dopaminergic mechanisms may modulate calling in the 50 kHz frequency band. To further elucidate these mechanisms, the present study investigated whether the pharmacological manipulation of glucocorticoid signaling influenced calling...
November 22, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29173909/voxel-by-voxel-correlation-between-radiologically-radiation-induced-lung-injury-and-dose-after-image-guided-intensity-modulated-radiotherapy-for-lung-tumors
#17
Michele Avanzo, Sara Barbiero, Marco Trovo, Jean-Pierre Bissonnette, Rajesh Jena, Joseph Stancanello, Giovanni Pirrone, Fabio Matrone, Emilio Minatel, Cristina Cappelletto, Carlo Furlan, David A Jaffray, Giovanna Sartor
PURPOSE: To correlate radiation dose to the risk of severe radiologically-evident radiation-induced lung injury (RRLI) using voxel-by-voxel analysis of the follow-up computed tomography (CT) of patients treated for lung cancer with hypofractionated helical Tomotherapy. METHODS AND MATERIALS: The follow-up CT scans from 32 lung cancer patients treated with various regimens (5, 8, and 25 fractions) were registered to pre-treatment CT using deformable image registration (DIR)...
October 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/29164074/systemic-responses-of-multidrug-resistant-pseudomonas-aeruginosa-and-acinetobacter-baumannii-following-exposure-to-the-antimicrobial-peptide-cathelicidin-bf-imply-multiple-intracellular-targets
#18
Cunbao Liu, Bin Shan, Jialong Qi, Yanbing Ma
Cathelicidin-BF, derived from the banded krait (Bungarus fasciatus), is a typically cationic, amphiphilic and α-helical antimicrobial peptide (AMP) with 30 amino acids that exerts powerful effects on multidrug-resistant (MDR) clinical isolates, including Pseudomonas aeruginosa, Acinetobacter baumannii, and Klebsiella pneumoniae, but whether it targets plasma membranes or intracellular targets to kill bacteria is still controversial. In the present study, we demonstrated that the disruption of bacterial membranes with high concentrations of cathelicidin-BF was the cause of bacterial death, as with conventional antibiotics at high concentrations...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29158914/unsupervised-progressive-elastic-band-exercises-for-frail-geriatric-inpatients-objectively-monitored-by-new-exercise-integrated-technology-a-feasibility-trial-with-an-embedded-qualitative-study
#19
C R Rathleff, T Bandholm, E G Spaich, M Jorgensen, J Andreasen
Background: Frailty is a serious condition frequently present in geriatric inpatients that potentially causes serious adverse events. Strength training is acknowledged as a means of preventing or delaying frailty and loss of function in these patients. However, limited hospital resources challenge the amount of supervised training, and unsupervised training could possibly supplement supervised training thereby increasing the total exercise dose during admission. A new valid and reliable technology, the BandCizer, objectively measures the exact training dosage performed...
2017: Pilot and Feasibility Studies
https://www.readbyqxmd.com/read/29157297/smoldering-myocarditis-following-immune-checkpoint-blockade
#20
Timothy G Norwood, Brian C Westbrook, Douglas B Johnson, Silvio H Litovsky, Nina L Terry, Svetlana B McKee, Alan S Gertler, Javid J Moslehi, Robert M Conry
BACKGROUND: Severe myocarditis associated with electrical conduction abnormalities and occasionally heart failure has been well documented following treatment with immune checkpoint blockade with an estimated incidence of less than 1%. However, the incidence, early detection, and management of less severe immune-related myocarditis are unknown since most immunotherapy trials have not included routine cardiac monitoring. Herein, we provide the first description of subclinical or smoldering myocarditis with minimal signs and symptoms following immune checkpoint blockade with a single dose of ipilimumab and nivolumab...
November 21, 2017: Journal for Immunotherapy of Cancer
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