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https://www.readbyqxmd.com/read/28535551/angiotensin-converting-enzyme-inhibitors-and-angiotensin-receptor-blockers-modulate-the-function-of-myelinated-fibers-after-chemotherapy-a-quantitative-sensory-testing-study
#1
Carlos J Roldan, Juhee Song, Mitchell P Engle, Patrick M Dougherty
BACKGROUND: Angiotensin-converting enzyme inhibitors (ACEI) and angiotensin receptor blockers (ARB) have sufficient scientific support for their use as tissue protectors. Preliminary studies suggest that their angiotensin-II type 2 receptor (AT2R)-blocking properties have a beneficial profile in the treatment of neuropathic pain. OBJECTIVES: The purpose of the current study was to quantify the extent of the somatosensory effects of ACEI and ARB in cancer patients with chemotherapy-induced peripheral neuropathy...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28505506/a-methodology-for-efficiency-optimization-of-betavoltaic-cell-design-using-an-isotropic-planar-source-having-an-energy-dependent-beta-particle-distribution
#2
Sirichai Theirrattanakul, Mark Prelas
Nuclear batteries based on silicon carbide betavoltaic cells have been studied extensively in the literature. This paper describes an analysis of design parameters, which can be applied to a variety of materials, but is specific to silicon carbide. In order to optimize the interface between a beta source and silicon carbide p-n junction, it is important to account for the specific isotope, angular distribution of the beta particles from the source, the energy distribution of the source as well as the geometrical aspects of the interface between the source and the transducer...
May 5, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28501668/response-adjusted-for-days-of-antibiotic-risk-radar-evaluation-of-a-novel-method-to-compare-strategies-to-optimise-antibiotic-use
#3
Valentijn A Schweitzer, Maarten van Smeden, Douwe F Postma, Jan Jelrik Oosterheert, Marc J M Bonten, Cornelis H van Werkhoven
OBJECTIVES: The Response Adjusted for Days of Antibiotic Risk (RADAR)-statistic was proposed to improve efficiency of trials comparing antibiotic stewardship strategies to optimize antibiotic use. We studied the behaviour of RADAR in a non-inferiority trial in which a beta-lactam monotherapy strategy (BL, n=656) was non-inferior to fluoroquinolone monotherapy (FQL, n=888) for moderately-severe community-acquired pneumonia (CAP) patients. METHODS: Patients were ranked according to clinical outcome, using five or eight categories, and antibiotic use...
May 10, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28498548/engineered-3d-cardiac-fibrotic-tissue-to-study-fibrotic-remodeling
#4
Amir Hossein Sadeghi, Su Ryon Shin, Janine C Deddens, Giuseppe Fratta, Serena Mandla, Iman K Yazdi, Gyan Prakash, Silvia Antona, Danilo Demarchi, Marc P Buijsrogge, Joost P G Sluijter, Jesper Hjortnaes, Ali Khademhosseini
Activation of cardiac fibroblasts into myofibroblasts is considered to play an essential role in cardiac remodeling and fibrosis. A limiting factor in studying this process is the spontaneous activation of cardiac fibroblasts when cultured on two-dimensional (2D) culture plates. In this study, a simplified three-dimensional (3D) hydrogel platform of contractile cardiac tissue, stimulated by transforming growth factor-β1 (TGF-β1), is presented to recapitulate a fibrogenic microenvironment. It is hypothesized that the quiescent state of cardiac fibroblasts can be maintained by mimicking the mechanical stiffness of native heart tissue...
May 12, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28492183/evaluation-of-sup-13-sup-co-sub-2-sub-enrichment-values-obtained-with-an-oral-breath-test-under-conditions-of-impaired-gastric-functioning-sup-sup
#5
Josef Vogt, Ulrich Wachter, Peter Radermacher, Michael Georgieff, Daniel König, Walter Fabinski, Eberhard Barth
Gastric emptying can be assessed by an oral administration of a <sup>13</sup>C-labeled substrate and its response in the expiratory release of the oxidation product <sup>13</sup>CO<sub>2</sub>. Impaired gut function, reflected e.g. in an intolerance against enteral nutrition may delay or discontinue gastric emptying, potentially leading to multiple peaks in the time profile of expiration. The resulting profile cannot be analyzed by the usual data evaluation that is based on a 'beta-exponential' function (<i>BEX</i>)...
May 11, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28490464/perioperative-cox-2-and-beta-adrenergic-blockade-improves-metastatic-biomarkers-in-breast-cancer-patients-in-a-phase-ii-randomized-trial
#6
Lee Shaashua, Maytal Shabat-Simon, Rita Haldar, Pini Matzner, Oded Zmora, Moshe Shabtai, Eran Sharon, Tanir Allweis, Iris Barshack, Lucile Hayman, Jesusa M G Arevalo, Jeffrey Ma, Maya Horowitz, Steve W Cole, Shamgar Ben-Eliyahu
<br /> <p>Translational studies suggest that excess perioperative release of catecholamines and prostaglandins may facilitate metastasis and reduce disease-free survival. This trial tested the combined perioperative blockade of these pathways in breast cancer patients.</p> <br />Experimental Design: <br /> <p>In a randomized placebo-controlled biomarker trial, 38 early-stage breast cancer patients received 11 days of perioperative treatment with a beta-adrenergic antagonist (propranolol) and a cyclooxygenase-2 (COX-2) inhibitor (etodolac), beginning five days before surgery...
May 10, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28489540/nonlinear-frequency-domain-analysis-of-the-transformation-of-cortical-inputs-by-a-motoneuron-pool-muscle-complex
#7
Renato Watanabe, Andre Kohn
Corticomotor coherence in the beta and/or gamma bands has been described in different motor tasks but the role of descending brain oscillations on force control has been elusive. Large-scale computational models of a motoneuron pool and the muscle it innervates have been used as tools to advance the knowledge of how neural elements may influence force control. Here we present a frequency domain analysis of a NARX model fitted to a large-scale neuromuscular model by means of generalized frequency response functions (GFRF)...
May 4, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28474030/a-beta-fe2o3-nanoparticle-assembled-film-for-photoelectrochemical-water-splitting
#8
Ningsi Zhang, Yongsheng Guo, Xin Wang, Shiying Zhang, Zhaosheng Li, Zhigang Zou
Since Fe2O3 is a promising photoanode material for water splitting, it has attracted much attention, while other phases of ferric oxide are ignored. Here, β-Fe2O3 was used as a photoanode material for solar water splitting. The crystal structure and phase of β-Fe2O3 were characterized by using X-ray diffraction, X-ray photoelectron spectroscopy, Raman scattering, Mössbauer spectra and a superconducting quantum interference device. The photocurrent density of the β-Fe2O3 photoanode at 1.6 VRHE was 0.12 mA·cm(-2) under the illumination of simulated sunlight (AM1...
May 5, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28469278/biosynthesis-of-the-antibiotic-nonribosomal-peptide-penicillin-in-baker-s-yeast
#9
Ali R Awan, Benjamin A Blount, David J Bell, William M Shaw, Jack C H Ho, Robert M McKiernan, Tom Ellis
Fungi are a valuable source of enzymatic diversity and therapeutic natural products including antibiotics. Here we engineer the baker's yeast Saccharomyces cerevisiae to produce and secrete the antibiotic penicillin, a beta-lactam nonribosomal peptide, by taking genes from a filamentous fungus and directing their efficient expression and subcellular localization. Using synthetic biology tools combined with long-read DNA sequencing, we optimize productivity by 50-fold to produce bioactive yields that allow spent S...
May 4, 2017: Nature Communications
https://www.readbyqxmd.com/read/28462026/ecological-and-pest-management-implications-of-sex-differences-in-scarab-landing-patterns-on-grape-vines
#10
Mauricio González-Chang, Stéphane Boyer, Marie-Caroline Lefort, Jerry Nboyine, Steve D Wratten
BACKGROUND: Melolonthinae beetles, comprising different white grub species, are a globally-distributed pest group. Their larvae feed on roots of several crop and forestry species, and adults can cause severe defoliation. In New Zealand, the endemic scarab pest Costelytra zealandica (White) causes severe defoliation on different horticultural crops, including grape vines (Vitis vinifera). Understanding flight and landing behaviours of this pest can help inform pest management decisions...
2017: PeerJ
https://www.readbyqxmd.com/read/28456904/myocardial-deformation-in-iron-overload-cardiomyopathy-speckle-tracking-imaging-in-a-beta-thalassemia-major-population
#11
Luca Antonio Felice Di Odoardo, Marianna Giuditta, Elena Cassinerio, Alberto Roghi, Patrizia Pedrotti, Marco Vicenzi, Veronica Maria Sciumbata, Maria Domenica Cappellini, Alberto Pierini
Traditional echocardiography is unable to detect neither the early stages of iron overload cardiomyopathy nor myocardial iron deposition. The aim of the study is to determine myocardial systolic strain indices in thalassemia major (TM), and assess their relationship with T2*, a cardiac magnetic resonance index of the severity of cardiac iron overload. 55 TM cases with recent cardiac magnetic resonance (CMR-T2*) underwent speckle tracking analysis to assess regional myocardial strains and rotation. The results were compared with a normal control group (n = 20), and were subsequently analyzed on the basis of the CMR-T2* values...
April 29, 2017: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28451608/the-functional-arm-scale-for-throwers-fast-part-i-the-design-and-development-of-an-upper-extremity-region-specific-and-population-specific-patient-reported-outcome-scale-for-throwing-athletes
#12
Eric L Sauers, R Curtis Bay, Alison R Snyder Valier, Traci Ellery, Kellie C Huxel Bliven
BACKGROUND: Upper extremity (UE) region-specific, patient-reported outcome (PRO) scales assess injuries to the UE but do not account for the demands of overhead throwing athletes or measure patient-oriented domains of health-related quality of life (HRQOL). PURPOSE: To develop the Functional Arm Scale for Throwers (FAST), a UE region-specific and population-specific PRO scale that assesses multiple domains of disablement in throwing athletes with UE injuries. In stage I, a beta version of the scale was developed for subsequent factor identification, final item reduction, and construct validity analysis during stage II...
March 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28444080/rhabdomyolysis-as-a-manifestation-of-a-metabolic-disease-a-case-report
#13
Marta Sousa Moniz, Maria Inês Mascarenhas, Carlos Escobar, Pedro Nunes, Clara Abadesso, Helena Loureiro, Helena Almeida
Rhabdomyolysis is a process of muscle destruction that can present with varying clinical manifestations. In pediatric patients, its main etiology is infectious diseases. We present a previously healthy adolescent who was admitted to our emergency department with a four-day history of myalgia, muscle weakness and dark urine. At presentation, she was dehydrated. Blood analysis revealed acute renal failure and increased muscular enzymes. She was transferred to our pediatric intensive care unit. Medical therapies for correction of dehydration and the ionic and metabolic consequences of renal failure were performed...
January 2017: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/28437032/autonomic-receptor-mediated-regulation-of-production-and-release-of-nitric-oxide-in-normal-and-malignant-human-urothelial-cells
#14
Michael Winder, Renata Vesela, Patrik Aronsson, Bhavik Patel, Thomas Carlsson
In the urinary bladder, the main source of NO seems to be the urothelium and the underlying suburothelium. In this study, we aimed to characterize how receptors in the human urothelium regulate the production and release of NO. For this, we cultured two human urothelial cell lines - the normal immortalized cell line UROtsa and the malignant cell line T24. These were treated with an array of agonists and antagonists with affinity for adrenergic, muscarinic and purinergic receptors. The production of NO and expression of nitric oxide synthase (NOS) was studied by immunocytochemistry and western blotting...
April 24, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28421415/a-tyrosine-residue-along-with-a-glutamic-acid-of-the-omega-like-loop-governs-the-beta-lactamase-activity-of-msmeg_4455-in-mycobacterium-smegmatis
#15
Ankita Bansal, Debasish Kar, Satya Deo Pandey, Ashok Matcha, N Ganesh Kumar, Soshina Nathan, Anindya S Ghosh
Mycobacterial beta-lactamases are involved in exerting beta-lactam resistance, though many of these proteins remain uncharacterized. Here, we have characterized MSMEG_4455 of Mycobacterium smegmatis as a beta-lactamase using molecular, biochemical and mutational techniques. To elucidate its nature in vivo and in vitro, and to predict its structure-function relationship in silico analysis is done. The MSMEG_4455 is cloned and expressed ectopically in a beta-lactamase deficient Escherichia coli mutant to establish the in vivo beta-lactamase like nature via minimum inhibitory concentration (MIC) determination...
April 19, 2017: Protein Journal
https://www.readbyqxmd.com/read/28421240/a-randomised-phase-ii-study-of-repeated-rhenium-188-hedp-combined-with-docetaxel-and-prednisone-versus-docetaxel-and-prednisone-alone-in-castration-resistant-prostate-cancer-crpc-metastatic-to-bone-the-taxium-ii-trial
#16
Joyce M van Dodewaard-de Jong, John M H de Klerk, Haiko J Bloemendal, Daniela E Oprea-Lager, Otto S Hoekstra, H Pieter van den Berg, Maartje Los, Aart Beeker, Marianne A Jonker, Joe M O'Sullivan, Henk M W Verheul, Alfons J M van den Eertwegh
BACKGROUND: Rhenium-188-HEDP is a beta-emitting radiopharmaceutical used for palliation of metastatic bone pain. We investigated whether the addition of rhenium-188-HEDP to docetaxel/prednisone improved efficacy of chemotherapy in patients with CRPC. METHODS: Patients with progressive CRPC and osteoblastic bone metastases were randomised for first-line docetaxel 75 mg/m(2) 3-weekly plus prednisone with or without 2 injections of rhenium-188-HEDP after the third (40 MBq/kg) and after the sixth (20 MBq/kg) cycle of docetaxel...
April 18, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28419211/the-inhibitory-g-protein-%C3%AE-subunit-g%C3%AE-z-promotes-type-1-diabetes-like-pathophysiology-in-nod-mice
#17
Rachel J Fenske, Mark T Cadena, Quincy E Harenda, Haley N Wienkes, Kathryn Carbajal, Michael D Schaid, Erin Laundre, Allison L Brill, Nathan A Truchan, Harpreet Brar, Jaclyn Wisinski, Jinjin Cai, Timothy E Graham, Feyza Engin, Michelle E Kimple
The alpha subunit of the heterotrimeric Gz protein, Gαz, promotes beta-cell death and inhibits beta-cell replication when pancreatic islets are challenged by stressors. Thus, we hypothesized that loss of Gαz protein would preserve functional beta-cell mass in the non-obese diabetic (NOD) model, protecting from overt diabetes. We saw that protection from diabetes was robust and durable up to 35 weeks of age in Gαz knockout mice. By 17 weeks of age, Gαz-null NOD mice had significantly higher diabetes-free survival than wild-type littermates...
April 14, 2017: Endocrinology
https://www.readbyqxmd.com/read/28418668/computing-the-diamagnetic-susceptibility-and-diamagnetic-anisotropy-of-membrane-proteins-from-structural-subunits
#18
Mahnoush Babaei, Isaac C Jones, Kaushik Dayal, Meagan S Mauter
The behavior of large, complex molecules in the presence of magnetic fields is experimentally challenging to measure and computationally intensive to predict. This work proposes a novel, mixed-methods approach for efficiently computing the principal magnetic susceptibilities and diamagnetic anisotropy of membrane proteins. The hierarchical primary (amino acid), secondary (α helical and β sheet), and tertiary (α helix and β barrel) structure of transmembrane proteins enables analysis of a complex molecule using discrete subunits of varying size and resolution...
April 25, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28414676/pheochromocytoma-of-the-organ-zuckerkandl
#19
C Lee, E Chang, J Gimenez, R McCarron
INTRODUCTION: Pheochromocytomas (PCCs);, or intra-adrenal paragangliomas (PGLs);, are neuroendocrine tumors arising within the adrenal medulla. Extra-adrenal paragangliomas may arise in the sympathetic or parasympathetic paraganglia and more rarely in other organs. One of the most common extra-adrenal sites is in the organ of Zuckerkandl, a collection of chromaffin cells near the origin of the inferior mesenteric artery or near the aortic bifurcation. The following is a case of a patient with resistant hypertension secondary to an extra-adrenal paraganglioma in the organ of Zuckerkandl...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28413178/synthesized-a%C3%AE-42-caused-intracellular-oxidative-damage-leading-to-cell-death-via-lysosome-rupture
#20
Yuki Oku, Kazuma Murakami, Kazuhiro Irie, Jun Hoseki, Yasuyoshi Sakai
Neuronal cellular accumulation of amyloid beta peptide (Aβ) has been implicated in the pathogenesis of Alzheimer’s disease (AD). Intracellular accumulation of Aβ42, a toxic form of Aβ, was observed as an early event in AD patients. However, its contribution and the cellular mechanism of cell death remained unclear. We herein revealed the mechanism by which Aβ42 incorporated into cells leads to cell death by using chemically synthesized Aβ42 variants. The Aβ42 variant Aβ42 (E22P) which has an increased tendency to oligomerize, accumulated in lysosomes at an earlier stage than wild-type Aβ42, leading to higher ROS production and lysosomal membrane oxidation, and resulting in cell death...
April 12, 2017: Cell Structure and Function
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