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https://www.readbyqxmd.com/read/28320116/in-vitro-non-viral-murine-pro-neurotrophin-3-gene-transfer-into-rat-bone-marrow-stromal-cells
#1
Shahram Darabi, Taki Tiraihi, AliReza Delshad, Majid Sadeghizadeh, Wisam Khalil, Taher Taheri
Neurotrophin 3 (NT-3) is an important factor for promoting prenatal neural development, as well as regeneration, axogenesis and plasticity in postnatal life. Therapy with NT-3 was reported to improve the condition of patients suffering from degenerative diseases and traumatic injuries, however, the disadvantage of NT-3 protein delivery is its short half-life, thus our alternative approach is the use of NT-3 gene therapy. In this study, the bone marrow stromal cells (BMSCs) were isolated from adult rats, cultured for 4 passages and transfected with either pEGFP-N1 or a constructed vector containing murine proNT-3 (pSecTag2/HygroB-murine proNT-3) using Lipofectamine 2000 followed by Hygromycin B (200mg/kg)...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28319994/growth-of-bacterial-phytopathogens-in-animal-manures
#2
Wojciech Sledz, Sabina Zoledowska, Agata Motyka, Leszek Kadziński, Bogdan Banecki
Animal manures are routinely applied to agricultural lands to improve crop yield, but the possibility to spread bacterial phytopathogens through field fertilization has not been considered yet. We monitored 49 cattle, horse, swine, sheep or chicken manure samples collected in 14 Polish voivodeships for the most important plant pathogenic bacteria - Ralstonia solanacearum (Rsol), Xanthomonas campestris pv. campestris (Xcc), Pectobacterium carotovorum subsp. carotovorum (Pcc), Pectobacterium atrosepticum (Pba), Erwinia amylovora (Eam), Clavibacter michiganensis subsp...
2017: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/28319664/reduction-of-folate-by-dihydrofolate-reductase-from-thermotoga-maritima
#3
E Joel Loveridge, Lukas Hroch, Robert L Hughes, Thomas Williams, Rhidian L Davies, Antonio Angelastro, Louis Y P Luk, Giovanni Maglia, Rudolf K Allemann
Mammalian dihydrofolate reductases (DHFR) catalyse the reduction of folate more efficiently than the equivalent bacterial enzymes, despite typically having similar efficiencies for the reduction of their natural substrate dihydrofolate. In contrast, we show here that DHFR from the hyperthermophilic bacterium Thermotoga maritima is able to catalyse reduction of folate to tetrahydrofolate with a similar efficiency to reduction of dihydrofolate under saturating conditions. NMR and mass spectrometry experiments showed no evidence for production of free dihydrofolate during either the EcDHFR- or TmDHFR-catalysed reductions of folate, suggesting that both enzymes perform the two reduction steps without release of the partially reduced substrate...
March 20, 2017: Biochemistry
https://www.readbyqxmd.com/read/28319562/translating-biomarkers-from-research-to-clinical-use-in-pediatric-neurocritical-care-focus-on-traumatic-brain-injury-and-cardiac-arrest
#4
Andrew J Prout, Michael S Wolf, Ericka L Fink
PURPOSE OF REVIEW: Traumatic brain injury (TBI) and cardiac arrest are important causes of morbidity and mortality in children. Improved diagnosis and outcome prognostication using validated biomarkers could allow clinicians to better tailor therapies for optimal efficacy. RECENT FINDINGS: Contemporary investigation has yielded plentiful biomarker candidates of central nervous system (CNS) injury, including macromolecules, genetic, inflammatory, oxidative, and metabolic biomarkers...
March 17, 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28319525/crowdsourcing-to-evaluate-fundus-photographs-for-the-presence-of-glaucoma
#5
Xueyang Wang, Lucy I Mudie, Mani Baskaran, Ching-Yu Cheng, Wallace L Alward, David S Friedman, Christopher J Brady
PURPOSE: To assess the accuracy of crowdsourcing for grading optic nerve images for glaucoma using Amazon Mechanical Turk before and after training modules. MATERIALS AND METHODS: Images (n=60) from 2 large population studies were graded for glaucoma status and vertical cup-to-disc ratio (VCDR). In the baseline trial, users on Amazon Mechanical Turk (Turkers) graded fundus photos for glaucoma and VCDR after reviewing annotated example images. In 2 additional trials, Turkers viewed a 26-slide PowerPoint training or a 10-minute video training and passed a quiz before being permitted to grade the same 60 images...
March 17, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28319519/process-improvement-initiative-for-the-perioperative-management-of-patients-with-a-cardiovascular-implantable-electronic-device
#6
Margaret K Menzel Ellis, Miriam M Treggiari, Jamie M Robertson, Marc A Rozner, Peter F Graven, Michael F Aziz, Matthias J Merkel, Edward A Kahl, Norman A Cohen, Eric C Stecker, Peter M Schulman
BACKGROUND: Economic, personnel, and procedural challenges often complicate and interfere with efficient and safe perioperative care of patients with cardiovascular implantable electronic devices (CIEDs). In the context of a process improvement initiative, we created and implemented a comprehensive anesthesiologist-run perioperative CIED service to respond to all routine requests for perioperative CIED consultations at a large academic medical center. This study was designed to determine whether this new care model was associated with improved operating room efficiency, reduced institutional cost, and adequate patient safety...
March 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28319511/the-first-us-clinical-experience-with-computer-assisted-propofol-sedation-a-retrospective-observational-comparative-study-on-efficacy-safety-efficiency-and-endoscopist-and-patient-satisfaction
#7
Otto S Lin, Richard A Kozarek, Deborah Tombs, Danielle La Selva, Wade Weigel, Ryan Beecher, Ana Jensen, Michael Gluck, Andrew Ross
BACKGROUND: Computer-assisted propofol sedation (CAPS) is now approved for moderate sedation of American Society of Anesthesiologists (ASA) class I and II patients undergoing routine endoscopy. As the first US medical center to adopt CAPS for routine clinical use, we compared patient and endoscopist satisfaction with CAPS versus midazolam and fentanyl (MF) sedation. METHODS: Patients who underwent elective outpatient upper endoscopy and colonoscopy with CAPS were compared with concurrent patients sedated with MF...
March 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28319484/nonpharmacologic-management-of-hypertension-a-multidisciplinary-approach
#8
Cemal Ozemek, Shane A Phillips, Dejana Popovic, Deepika Laddu-Patel, Ibra S Fancher, Ross Arena, Carl J Lavie
PURPOSE OF REVIEW: Nonpharmacologic lifestyle modification interventions (LMIs), such as increasing physical activity, dietary modification, weight-loss, reducing alcohol consumption and smoking cessation, are effective strategies to lower resting blood pressures (BPs) in prehypertensive or hypertensive patients. However, the limited time shared between a physician and a patient is not adequate to instill an adoption of LMI. The purpose of this review is to therefore highlight evidence-based BP lowering, LMI strategies that can feasibly be implemented in clinical practices...
March 17, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28319477/emerging-techniques-in-truly-minimal-invasive-treatment-options-of-benign-prostatic-obstruction
#9
Karl-Dietrich Sievert, Thomas Kunit
PURPOSE OF REVIEW: Benign prostatic enlargement is a common age-related condition, affecting over 50% of men aged more than 60 years. Side effects of medical therapy and significant morbidity of transurethral resection of the prostate and open surgery led to the development of so-called minimally invasive procedures, with the aim to be efficient but with less morbidity and shorter or no hospitalization. For this review, a systematic literature was performed. We report recent results in different treatment options for benign prostate hypoplasia (BPH) and recommend the best minimal-invasive treatment for BPH...
March 17, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/28319384/eugenol-nanoemulsion-stabilized-with-zein-and-sodium-caseinate-by-self-assembly
#10
Lei Wang, Yue Zhang
Eugenol-loaded nanoemulsion by zein and sodium caseinate (NaCas) was prepared without using specific equipment or organic solvents. The deprotonated eugenol in hot alkaline was added into NaCas/zein mixtures with different mass ratios at pH 11.5, and then neutralized to pH 7.0. The nanoemulsions showed well-defined diameter (around 109-139 nm) and negative surface potential (-28.5~ -35.8 mv). The entrapment efficiency (EE) of 1% v/v eugenol reached 84.24% by 2% m/v NaCas/zein at a mass ratio of 1:1. This formulation also showed the narrowest size distribution, extraordinary stability during ambient storage (22 oC) up to 30 days, and retained good re-dispersiblity after spray- or freeze- drying...
March 20, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28319382/time-resolved-spectroscopic-investigation-of-charge-trapping-in-carbon-nitrides-photocatalysts-for-hydrogen-generation
#11
Robert Godin, Yiou Wang, Martijn A Zwijnenburg, Junwang Tang, James R Durrant
Carbon nitride (g-C3N4) as a benchmark polymer photocatalyst is attracting significant research interest because of its visible light photocatalytic performance combined with good stability and facile synthesis. However, little is known about the fundamental photophysical processes of g-C3N4, which are key to explain and promote photoactivity. Using time-resolved absorption and photoluminescence spectroscopies, we have investigated the photophysics of a series of carbon nitrides on timescales ranging from femtoseconds to seconds...
March 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28319374/mechanisms-of-energy-transfer-and-enhanced-stability-of-carbidonitride-phosphors-for-solid-state-lighting
#12
Christopher Grieco, Kurt F Hirsekorn, Andrew T Heitsch, Alan C Thomas, Mark H McAdon, Britt A Vanchura, Michael M Romanelli, Lora L Brehm, Anne Leugers, Anatoliy Sokolov, John B Asbury
Phosphor-converted light emitting diodes (pcLEDs) produce white light through the use of phosphors that convert blue light emitted from the LED chip into green and red wavelengths. Understanding the mechanisms of degradation of the emission spectra and quantum yields of the phosphors used in pcLEDs is of critical importance to fully realize the potential of solid state lighting as an energy efficient technology. Toward this end, time-resolved photoluminescence spectroscopy was used to identify the mechanistic origins of enhanced stability and luminescence efficiency that can be obtained from a series of carbidonitride red phosphors with varying degree of substitutional carbon...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28319340/composition-dependent-hot-carrier-relaxation-dynamics-in-cesium-lead-halide-cspbx3-x-br-and-i-perovskite-nanocrystals
#13
Heejae Chung, Seok Il Jung, Hyo Jin Kim, Wonhee Cha, Eunji Sim, Dongho Kim, Weon-Kyu Koh, Jiwon Kim
Cesium-based perovskite nanocrystals (NCs) have outstanding photophysical properties improving the performances of lighting devices. Fundamental studies on excitonic properties and hot-carrier dynamics in perovskite NCs further suggest that these materials show higher efficiencies compared to the bulk form of perovskites. However, the relaxation rates and pathways of hot-carriers are still being elucidated. By using ultrafast transient spectroscopy and calculating electronic band structures, we investigated the dependence of halide in Cs-based perovskite (CsPbX3 with X=Br, I, or their mixtures) NCs on the hot-carrier relaxation processes...
March 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28319303/synthesis-of-indoles-and-pyrroles-utilizing-iridium-carbenes-generated-from-sulfoxonium-ylides
#14
Janakiram Vaitla, Annette Bayer, Kathrin H Hopmann
Metal carbenes can undergo a myriad of synthetic transformations. Sulfur ylides are potential safe precursors of metal carbenes. Herein, we report cascade reactions that involve carbenoids derived from sulfoxonium ylides for the efficient and regioselective synthesis of indoles and pyrroles. The tandem action of iridium and Brønsted acid catalysts enables rapid assembly of the heterocycles from unmodified anilines or readily accessible enamines under microwave irradiation. The key mechanistic steps are the catalytic transformation of the sulfoxonium ylide into an iridium-carbene complex, followed by N-H or C-H functionalization of an aniline or enamine, respectively, and a final acid-catalyzed cyclization...
March 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28319287/iatrogenic-thyrotoxicosis-and-the-role-of-therapeutic-plasma-exchange
#15
Kabeer K Shah, Michael M Mbughuni, Edwin A Burgstaler, Darci R Block, Jeffrey L Winters
Thyroid storm or severe thyrotoxicosis results from extreme thyroid hormone elevation. Therapy includes medical management to prevent hormone production, release, recycling, and peripheral conversion while stabilizing adrenergic tone. Thyroid dysfunction is the usual cause but it can be due to excessive thyroid hormone ingestion. Therapeutic plasma exchange (TPE) has been used to rapidly remove protein-bound thyroid hormone. American Society for Apheresis guidelines make a weak recommendation to perform TPE in selected patients in the treatment of thyrotoxicosis based on low quality evidence...
March 20, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/28319276/comparisons-of-statistical-techniques-to-assess-age-related-skeletal-markers-in-bioarchaeology
#16
Colleen M Cheverko, Mark Hubbe
OBJECTIVES: Many authors argue that inconsistencies between studies of skeletal markers are based on different data collection protocols, especially when comparing age-related markers such as osteoarthritis. Less attention is given to the choice of statistical techniques that are used to test the hypotheses associated with the data. This paper addresses how different statistical techniques compare the prevalence of age-related skeletal indicators, specifically osteoarthritis. MATERIALS AND METHODS: Osteoarthritis prevalence was scored in eight postcranial joints in 243 adult individuals from seven prehistoric archaeological sites in Central California, and data was compared between three time periods [Early (4800-2800 BP), Middle (2800-1200 BP), and Late (1200-250 BP)] using commonly used statistical tests: chi-square, Fisher's exact, and odds ratios...
March 20, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28319223/kinetics-and-heterogeneity-of-energy-transfer-from-light-harvesting-complex-ii-to-photosystem-i-in-the-supercomplex-isolated-from-arabidopsis
#17
Stefano Santabarbara, Tania Tibiletti, William Remelli, Stefano Caffarri
State transitions are a phenomenon that maintains the excitation balance between photosystem II (PSII) and photosystem I (PSI-LHCI) by controlling their relative absorption cross-sections. Under light conditions exciting PSII preferentially, a trimeric LHCII antenna moves from PSII to PSI-LHCI to form the PSI-LHCI-LHCII supercomplex. In this work, the excited state dynamics in the PSI-LHCI and PSI-LHCI-LHCII supercomplexes isolated from Arabidopsis have been investigated by picosecond time-resolved fluorescence spectroscopy...
March 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28319188/reduced-performance-of-a-pvc-coated-biogents-sentinel-prototype-in-comparison-to-the-original-biogents-sentinel-for-monitoring-the-asian-tiger-mosquito-aedes-albopictus-in-temperate-north-america
#18
Isik Unlu, Ary Faraji, Michael Morganti, Randy Vaeth, Karen Akaratovic, Jay Kiser, Charles Abadam, Dan Kline
Aedes albopictus is a major nuisance pest and also a public health concern because of the role it plays in the transmission of arboviruses. There is a continuing demand for effective surveillance tools for this species. The first generation of Biogents Sentinel (BGS1) traps have proven to be an effective tool for surveillance of Ae. albopictus throughout its range, however, some defects in construction led to the eventual development of the next generation. We compared the performance of the new generation prototype trap (BGS2P) to the original...
2017: PloS One
https://www.readbyqxmd.com/read/28319176/insight-into-the-mechanism-of-action-of-temporin-sha-a-new-broad-spectrum-antiparasitic-and-antibacterial-agent
#19
Zahid Raja, Sonia André, Feten Abbassi, Vincent Humblot, Olivier Lequin, Tahar Bouceba, Isabelle Correia, Sandra Casale, Thierry Foulon, Denis Sereno, Bruno Oury, Ali Ladram
Antimicrobial peptides (AMPs) are promising drugs to kill resistant pathogens. In contrast to bacteria, protozoan parasites, such as Leishmania, were little studied. Therefore, the antiparasitic mechanism of AMPs is still unclear. In this study, we sought to get further insight into this mechanism by focusing our attention on temporin-SHa (SHa), a small broad-spectrum AMP previously shown to be active against Leishmania infantum. To improve activity, we designed analogs of SHa and compared the antibacterial and antiparasitic mechanisms...
2017: PloS One
https://www.readbyqxmd.com/read/28319152/a-digital-pcr-method-for-identifying-and-quantifying-adulteration-of-meat-species-in-raw-and-processed-food
#20
Junan Ren, Tingting Deng, Wensheng Huang, Ying Chen, Yiqiang Ge
Meat adulteration is a worldwide concern. In this paper, a new droplet digital PCR (ddPCR) method was developed for the quantitative determination of the presence of chicken in sheep and goat meat products. Meanwhile, a constant (multiplication factor) was introduced to transform the ratio of copy numbers to the proportion of meats. The presented ddPCR method was also proved to be more accurate (showing bias of less than 9% in the range from 5% to 80%) than real-time PCR, which has been widely used in this determination...
2017: PloS One
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