keyword
MENU ▼
Read by QxMD icon Read
search

A-beta

keyword
https://www.readbyqxmd.com/read/28637243/nanopore-sequencing-data-analysis-state-of-the-art-applications-and-challenges
#1
Alberto Magi, Roberto Semeraro, Alessandra Mingrino, Betti Giusti, Romina D'Aurizio
The nanopore sequencing process is based on the transit of a DNA molecule through a nanoscopic pore, and since the 90s is considered as one of the most promising approaches to detect polymeric molecules. In 2014, Oxford Nanopore Technologies (ONT) launched a beta-testing program that supplied the scientific community with the first prototype of a nanopore sequencer: the MinION. Thanks to this program, several research groups had the opportunity to evaluate the performance of this novel instrument and develop novel computational approaches for analyzing this new generation of data...
June 16, 2017: Briefings in Bioinformatics
https://www.readbyqxmd.com/read/28634472/antifungal-activity-against-filamentous-fungi-of-ts1-a-multifunctional-toxin-from-tityus-serrulatus-scorpion-venom
#2
Welligton M Santussi, Karla C F Bordon, Ana P N Rodrigues Alves, Camila T Cologna, Suraia Said, Eliane C Arantes
Antimicrobial peptides (AMPs) are ubiquitous and multipotent components of the innate immune defense arsenal used by both prokaryotic and eukaryotic organisms. The search for new AMPs has increased in recent years, due to the growing development of microbial resistance to therapeutical drugs. In this work, we evaluate the effects of Tityus serrulatus venom (Tsv), its fractions and its major toxin Ts1, a beta-neurotoxin, on fungi growth. The fractions were obtained by ion-exchange chromatography of Tsv. The growth inhibition of 11 pathogenic and non-pathogenic filamentous fungi (Aspergillus fumigatus, A...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28632991/uncovering-the-repertoire-of-fungal-secondary-metabolites-from-fleming-s-lab-to-the-international-space-station
#3
Tomasz Boruta
Fungi produce a variety of secondary metabolites (SMs), low-molecular weight compounds associated with many potentially useful biological activities. The examples of biotechnologically relevant fungal metabolites include penicillin, a beta-lactam antibiotic, and lovastatin, a cholesterol-lowering drug. The discovery of pharmaceutical lead compounds within the microbial metabolic pools relies on the selection and biochemical characterization of promising strains. Not all SMs are produced under standard cultivation conditions, hence the uncovering of chemical potential of investigated strains often requires the use of induction strategies to awake the associated biosynthetic genes...
June 20, 2017: Bioengineered
https://www.readbyqxmd.com/read/28631483/amyloid-beta-peptide-folding-in-reverse-micelles
#4
Gozde Eskici, Paul H Axelsen
Previously published experimental studies have suggested that when the 40-residue amyloid beta peptide is encapsulated in a reverse micelle, it folds into a structure that may nucleate amyloid fibril formation (Yeung and Axelsen, J. Am. Chem. Soc. 134:6061, 2012). The factors that induce the formation of this structure have now been identified in a multi-microsecond simulation of the same reverse micelle system that was studied experimentally. Key features of the polypeptide-micelle interaction include the anchoring of a hydrophobic residue cluster into the reverse micelle surface, the formation of a beta turn at the anchor point that brings N- and C-terminal segments of the polypeptide into proximity, high ionic strength that promotes intramolecular hydrogen bond formation, and deformation of the reverse micelle surface to facilitate interactions with the surface along the entire length of the polypeptide...
June 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28631437/control-of-virulence-gene-transcription-by-indirect-readout-in-vibrio-cholerae-and-salmonella-enterica-serovar-typhimurium
#5
Charles J Dorman, Matthew J Dorman
Indirect readout mechanisms of transcription control rely on the recognition of DNA shape by transcription factors (TFs). TFs may also employ a direct readout mechanism that involves the reading of the base sequence in the DNA major groove at the binding site. TFs with winged helix-turn-helix (wHTH) motifs use an alpha helix to read the base sequence in the major groove while inserting a beta sheet 'wing' into the adjacent minor groove. Such wHTH proteins are important regulators of virulence gene transcription in many pathogens; they also control housekeeping genes...
June 19, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28630226/thyrotoxic-periodic-paralysis-as-an-initial-presentation-of-graves-disease-in-a-saudi-patient
#6
S F Alqahtani, M M Aleithan
Thyrotoxic periodic paralysis (TPP) is a well-known complication of hyperthyroidism, characterised by recurrent flaccid paralysis with hypokalaemia. To date, only five cases of this rare disorder have been reported in Saudi Arabia. Here, we report an additional case involving a 25-year-old Saudi man who presented with lower limb paralysis and severe hypokalaemia. Clinically, he showed symptoms and signs suggestive of Graves' disease, which was confirmed by laboratory investigations. Carbimazole, a beta-blocker and potassium replacement were administered, resulting in dramatic improvement of the TTP...
June 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28628931/-the-probabilistic-efficiency-frontier-a-value-assessment-of-treatment-options-in-hepatitis-c
#7
Axel C Mühlbacher, Andrew Sadler
Background The German Institute for Quality and Efficiency in Health Care (IQWiG) recommends the concept of the efficiency frontier to assess health care interventions. The efficiency frontier supports regulatory decisions on reimbursement prices for the appropriate allocation of health care resources. Until today this cost-benefit assessment framework has only been applied on the basis of individual patient-relevant endpoints. This contradicts the reality of a multi-dimensional patient benefit. Objective The objective of this study was to illustrate the operationalization of multi-dimensional benefit considering the uncertainty in clinical effects and preference data in order to calculate the efficiency of different treatment options for hepatitis C (HCV)...
June 19, 2017: Das Gesundheitswesen
https://www.readbyqxmd.com/read/28619446/design-synthesis-and-evaluation-of-dna-topoisomerase-ii-targeted-nucleosides
#8
Hironobu Matsumoto, Mitsuaki Yamashita, Teruyuki Tahara, Shinya Hayakawa, Shun-Ichi Wada, Kiyoshi Tomioka, Akira Iida
We developed novel nucleoside-based topoisomerase II selective inhibitors and showed that small structural units, such as catechols, are essential for DNA topoisomerase II inhibitory activity. Moreover, nucleoside analogues containing TBS and 1,3-dithian moieties had potent and selective DNA topoisomerase II inhibitory activities. In further experiments, compound 25b having a beta configuration of the thymine moiety showed relatively strong growth inhibitory activity against cancer cell lines, and was more potent against all cancer cell lines than compound 26b, which carries a thymine moiety in the alpha configuration...
June 2, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28613197/experimental-and-simulation-analysis-of-radiation-of-the-beta-emitting-sources-in-a-magnetic-field
#9
Berrin Çavuşoğlu, Selda Sucu, Hatice Durak, Kadir Akgüngör, Hakan Epik, Türkan Ertay
OBJECTIVE: The behavior of beta particles under the magnetic field was investigated both theoretically and experimentally based on the assumption of reducing the damage to the normal tissues created by using magnetic field in radionuclide therapy. METHODS: A water-filled spherical medium and a beta particle source was formed by using Geant4 simulation software for the theoretical study. After applying a homogenous magnetic field, the volume of points at which the particles interact with the medium was calculated by determining particle range...
June 1, 2017: Molecular Imaging and Radionuclide Therapy
https://www.readbyqxmd.com/read/28608512/commencement-of-cardioselective-beta-blockers-during-hospitalisation-for-acute-exacerbations-of-chronic-obstructive-pulmonary-disease
#10
Pieter A Neef, Louise M Burrell, Christine F McDonald, Louis B Irving, Douglas F Johnson, Daniel P Steinfort
BACKGROUND: In patients with chronic obstructive pulmonary disease (COPD) and comorbid cardiovascular disease emerging evidence suggests a benefit in commencing cardioselective beta-blockers. AIM: Our objective was to determine the safety of beta-blocker commencement during hospitalisation for acute exacerbation of COPD. METHODS: A retrospective cohort study of 1,071 patients hospitalised for acute exacerbation of COPD was conducted across two tertiary hospitals over a 12-month period...
June 13, 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28601833/targeted-simplification-versus-antipseudomonal-broad-spectrum-beta-lactams-in-patients-with-bloodstream-infections-due-to-enterobacteriaceae-simplify-a-study-protocol-for-a-multicentre-open-label-phase-iii-randomised-controlled-non-inferiority-clinical-trial
#11
Luis Eduardo López-Cortés, Clara Rosso-Fernández, María Núñez-Núñez, Lucía Lavín-Alconero, José Bravo-Ferrer, Ángel Barriga, Mercedes Delgado, Carmen Lupión, Pilar Retamar, Jesús Rodríguez-Baño
INTRODUCTION: Within the context of antimicrobial stewardship programmes, de-escalation of antimicrobial therapy is one of the proposed strategies for reducing the unnecessary use of broad-spectrum antibiotics (BSA). The empirical treatment of nosocomial and some healthcare-associated bloodstream infections (BSI) frequently includes a beta-lactam with antipseudomonal activity as monotherapy or in combination with other drugs, so there is a great opportunity to optimise the empirical therapy based on microbiological data...
June 9, 2017: BMJ Open
https://www.readbyqxmd.com/read/28600390/direct-and-indirect-visualization-of-bacterial-effector-delivery-into-diverse-plant-cell-types-during-infection
#12
Elizabeth Henry, Tania Y Toruño, Alain Jauneau, Laurent Deslandes, Gitta Laurel Coaker
To cause disease, diverse pathogens deliver effector proteins into host cells. Pathogen effectors can inhibit defense responses, alter host physiology, and represent important cellular probes to investigate plant biology. However, effector function and localization have primarily been investigated after overexpression in planta. Visualizing effector delivery during infection is challenging due to the plant cell wall, autofluorescence, and low effector abundance. Here, we utilized a GFP strand system to directly visualize bacterial effectors delivered into plant cells through the Type III secretion system...
June 9, 2017: Plant Cell
https://www.readbyqxmd.com/read/28599227/assessment-and-estimation-of-67-cu-production-yield-via-deuteron-induced-reactions-on-nat-zn-and-70-zn
#13
Seyedeh Fatemeh Hosseini, Mohammadreza Aboudzadeh, Mahdi Sadeghi, Ahmad Ahmadi Teymourlouy, Malihe Rostampour
(67)Cu radioisotope is a beta particle-emitting nuclide used in radioimmunotherapy (RIT) as well as for imaging, tracer kinetic studies and dosimetry. (67)Cu can be produced by bombarding (nat)Zn with deuterons. In this study, the physical yields of (67)Cu via (nat)Zn(d,x)(67)Cu reaction channel as well as via subreactions of (68)Zn(d,2pn)(67)Cu, (67)Zn(d,2p)(67)Cu, (70)Zn(d,2p3n)(67)Cu, (68)Zn(d,x)(67)Ni(T1/2=21s)→(67)Cu and (70)Zn(d,x)(67)Ni(T1/2=21s)→(67)Cu in the (nat)Zn target have been calculated by using the MCNPX-2...
May 31, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28596818/trend-of-hepatocellular-carcinoma-incidence-after-bayesian-correction-for-misclassified-data-in-iranian-provinces
#14
Nastaran Hajizadeh, Ahmad Reza Baghestani, Mohamad Amin Pourhoseingholi, Sara Ashtari, Zeinab Fazeli, Mohsen Vahedi, Mohammad Reza Zali
AIM: To study the trend of hepatocellular carcinoma incidence after correcting the misclassification in registering cancer incidence across Iranian provinces in cancer registry data. METHODS: Incidence data of hepatocellular carcinoma were extracted from Iranian annual of national cancer registration reports 2004 to 2008. A Bayesian method was implemented to estimate the rate of misclassification in registering cancer incidence in neighboring province. A beta prior is considered for misclassification parameter...
May 28, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28593092/aortic-injury-due-to-paragliding-a-case-report
#15
Kazuhiko Omori, Kei Jitsuiki, Takashi Majima, Ikuto Takeuchi, Toshihiko Yoshizaw, Kouhei Ishikawa, Hiromichi Ohsaka, Keiichi Tambara, Youichi Yanagawa
A 64-year-old male fell from an altitude of 10 m while paragliding after stalling due to the wind. The purpose of this case report is to describe the outcomes after multiple injuries sustained during a paragliding accident, including a potentially life-threating injury to the thoracic aorta. The subject sustained a bite wound on his tongue, injuries to his chest (left side) and back, and a right forearm deformity. Enhanced whole body computed tomography (CT) revealed fractures of the bilateral laminae of the second and third cervical bones, right first rib, the tenth thoracic vertebral body (compression type), second lumbar vertebral body (burst type) and the right radius, Other injuries included an injury to the thoracic aortic arch and the presence of intraabdominal fluid collection without perforation of the digestive tract...
June 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28589543/beta-blocker-use-and-fall-risk-in-older-individuals-original-results-from-two-studies-with-meta-analysis
#16
Annelies C Ham, Suzanne C van Dijk, Karin M A Swart, Anke W Enneman, Nikita L van der Zwaluw, Elske M Brouwer-Brolsma, Natasja M van Schoor, M Carola Zillikens, Paul Lips, Lisette C P G M de Groot, Albert Hofman, Renger F Witkamp, André G Uitterlinden, Bruno H Stricker, Nathalie van der Velde
AIMS: To investigate the association between use of beta-blockers and beta-blocker characteristics - selectivity, lipid solubility, intrinsic sympathetic activity (ISA), and CYP2D6 enzyme metabolism - and fall risk. METHODS: Data from two prospective studies were used, including community-dwelling individuals, N=7,662 (the Rotterdam Study) and 2,407 (B-PROOF), all aged ≥55 years. Fall incidents were recorded prospectively. Time-varying beta-blocker use was determined using pharmacy dispensing records...
June 7, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28572795/cephalosporin-glycopeptide-combinations-for-use-against-clinical-methicillin-resistant-staphylococcus-aureus-isolates-enhanced-in-vitro-antibacterial-activity
#17
Hung-Jen Tang, Chih-Cheng Lai, Chi-Chung Chen, Chun-Cheng Zhang, Tzu-Chieh Weng, Wen-Liang Yu, Hung-Jui Chen, Yu-Hsin Chiu, Wen-Chien Ko, Yin-Ching Chuang
The empirical combination of both a beta-lactam and glycopeptide to counter potential staphylococcal pathogens may improve the clinical outcomes for cases of Staphylococcus aureus bacteremia. We reported comparative in vitro studies of combination effects of different cephalosporins (i.e., cefazolin, cefmetazole, cefotaxime, and cefepime) combined with glycopeptides for 34 randomly selected methicillin-resistant S. aureus (MRSA) isolates by three methods, including the checkerboard, time-killing, and combination MIC measurement methods...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28559422/comparison-of-corneal-dynamic-parameters-and-tomographic-measurements-using-scheimpflug-imaging-in-keratoconus
#18
Tommy Cy Chan, Yu Meng Wang, Marco Yu, Vishal Jhanji
AIM: To compare the diagnostic ability of corneal tomography and corneal dynamic response measurements in normal and keratoconus eyes. METHODS: Consecutive patients with grade II-III keratoconus and age-matched normal subjects were recruited. Corneal imaging was performed using Pentacam (Oculus Optikgeräte, Wetzlar, Germany) and Corvis (Oculus Optikgeräte). A beta version of Corvis software was used with three additional parameters: maximal change of arc length, deformation amplitude (DA) ratio 1 and DA ratio 2...
May 30, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28555777/early-ictal-and-interictal-patterns-in-fires-the-sparks-before-the-blaze
#19
Raquel Farias-Moeller, Luca Bartolini, Katelyn Staso, John M Schreiber, Jessica L Carpenter
OBJECTIVE: Febrile infection-related epilepsy syndrome (FIRES) is a catastrophic epileptic encephalopathy described as explosive onset of super refractory status epilepticus (SRSE) in previously healthy children. We describe electroencephalography (EEG) abnormalities in the hyperacute phase of FIRES, with the aim of contributing to the diagnostic characterization of a syndrome otherwise lacking specific biomarkers. METHODS: This is a retrospective single-center, case series of seven children with FIRES...
May 26, 2017: Epilepsia
https://www.readbyqxmd.com/read/28554010/a-bilaminated-decellularized-scaffold-for-islet-transplantation-structure-properties-and-functions-in-diabetic-mice
#20
Xi Wang, Kai Wang, Wei Zhang, Ming Qiang, Ying Luo
Ectopic transplantation of islets provides a beta cell-replacement approach that may allow the recovery of physiological regulation of the blood sugar level in patients with Type I diabetes (T1D). In development of new extrahepatic islet transplantation protocols in support of the islet engraftment, it is pivotal to develop scaffold materials with multifaceted functions to provide beneficial microenvironment, mediate host response in favor of vascularization/islet integration and maintain long-term islet function at the transplantation site...
May 22, 2017: Biomaterials
keyword
keyword
46102
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"