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https://www.readbyqxmd.com/read/29775305/one-pot-synthesis-of-four-chlorin-derivatives-by-a-divergent-ylide
#1
Junior Gonzales, Naga Venkata Satya Dinesh Kumar Bhupathiraju, Daniel Hart, Man Yuen, Maria Pia Sifuentes, Bleron Samarxhiu, Mark Maranan, Naxhije Berisha, James Batteas, Charles Michael Drain
Chlorins have unique photophysical properties that are exploited in diverse biological and materials applications. De novo chlorin synthesis with specific exocyclic motifs can be challenging and many are not stable to photobleaching and/or oxidation. A facile approach to a stable synthetic chlorin with a fused N-methyl pyrrolidine uses cyclo addition of a sarcosine-based azomethine ylide on 5,10,15,20-tetrakis-(2,3,4,5,6-pentafluorophenyl)-porphyrin (TPPF20) is reported, but this approach has limitations. We report the synthesis of stable chlorin scaffolds starting with TPPF20 using a new glycine-based N-(hydroxymethyl)-N-methelenemethanideaminium ylide...
May 18, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29773803/a-novel-small-molecule-chaperone-of-rod-opsin-and-its-potential-therapy-for-retinal-degeneration
#2
Yuanyuan Chen, Yu Chen, Beata Jastrzebska, Marcin Golczak, Sahil Gulati, Hong Tang, William Seibel, Xiaoyu Li, Hui Jin, Yong Han, Songqi Gao, Jianye Zhang, Xujie Liu, Hossein Heidari-Torkabadi, Phoebe L Stewart, William E Harte, Gregory P Tochtrop, Krzysztof Palczewski
Rhodopsin homeostasis is tightly coupled to rod photoreceptor cell survival and vision. Mutations resulting in the misfolding of rhodopsin can lead to autosomal dominant retinitis pigmentosa (adRP), a progressive retinal degeneration that currently is untreatable. Using a cell-based high-throughput screen (HTS) to identify small molecules that can stabilize the P23H-opsin mutant, which causes most cases of adRP, we identified a novel pharmacological chaperone of rod photoreceptor opsin, YC-001. As a non-retinoid molecule, YC-001 demonstrates micromolar potency and efficacy greater than 9-cis-retinal with lower cytotoxicity...
May 17, 2018: Nature Communications
https://www.readbyqxmd.com/read/29771757/teaching-mental-health-first-aid-in-the-school-setting-a-novel-approach-to-improving-outcomes-for-common-adolescent-mental-disorders
#3
Laura M Hart, Georgina R Cox, Lucy Lees
PURPOSE OF REVIEW: Common adolescent mental disorders, such as depression, often go untreated and severely impact health and educational outcomes. The purpose of this review is to describe what is currently known about school-based mental health interventions and to describe a new intervention, Mental Health First Aid training. RECENT FINDINGS: Universal and selective prevention and treatment programmes have been widely evaluated, though population-level dissemination remains elusive...
May 15, 2018: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/29770149/diffuse-gastric-ganglioneuromatosis-novel-presentation-of-pten-hamartoma-syndrome-case-report-and-review-of-gastric-ganglioneuromatous-proliferations-and-a-novel-pten-gene-mutation
#4
Alexander J Williams, Emily S Doherty, Michael H Hart, Douglas J Grider
Gastrointestinal ganglioneuromatous proliferations are rare, most often found in the colon, and are three types: polypoid ganglioneuromas, ganglioneuromatous polyposis, and diffuse ganglioneuromatosis. We present a case of diffuse ganglioneuromatosis in the posterior gastric wall in a nine-year-old female. To our knowledge, this is the first reported case of diffuse ganglioneuromatosis located in the stomach. Only six cases of gastric ganglioneuromatous proliferations have previously been reported, two in English and none were diffuse ganglioneuromatosis...
2018: Case Reports in Medicine
https://www.readbyqxmd.com/read/29768469/misidentification-of-sex-for-lampsilis-teres-yellow-sandshell-and-its-implications-for-mussel-conservation-and-wildlife-management
#5
Megan C Hess, Kentaro Inoue, Eric T Tsakiris, Michael Hart, Jennifer Morton, Jack Dudding, Clinton R Robertson, Charles R Randklev
Correct identification of sex is an important component of wildlife management because changes in sex ratios can affect population viability. Identification of sex often relies on external morphology, which can be biased by intermediate or nondistinctive morphotypes and observer experience. For unionid mussels, research has demonstrated that species misidentification is common but less attention has been given to the reliability of sex identification. To evaluate whether this is an issue, we surveyed 117 researchers on their ability to correctly identify sex of Lampsilis teres (Yellow Sandshell), a wide ranging, sexually dimorphic species...
2018: PloS One
https://www.readbyqxmd.com/read/29766772/rivaroxaban-for-stroke-prevention-after-embolic-stroke-of-undetermined-source
#6
Robert G Hart, Mukul Sharma, Hardi Mundl, Scott E Kasner, Shrikant I Bangdiwala, Scott D Berkowitz, Balakumar Swaminathan, Pablo Lavados, Yongjun Wang, Yilong Wang, Antonio Davalos, Nikolay Shamalov, Robert Mikulik, Luis Cunha, Arne Lindgren, Antonio Arauz, Wilfried Lang, Anna Czlonkowska, Jens Eckstein, Rubens J Gagliardi, Pierre Amarenco, Sebastian F Ameriso, Turgut Tatlisumak, Roland Veltkamp, Graeme J Hankey, Danilo Toni, Daniel Bereczki, Shinichiro Uchiyama, George Ntaios, Byung-Woo Yoon, Raf Brouns, Matthias Endres, Keith W Muir, Natan Bornstein, Serefnur Ozturk, Martin J O'Donnell, Matthys M De Vries Basson, Guillaume Pare, Calin Pater, Bodo Kirsch, Patrick Sheridan, Gary Peters, Jeffrey I Weitz, W Frank Peacock, Ashkan Shoamanesh, Oscar R Benavente, Campbell Joyner, Ellison Themeles, Stuart J Connolly
Background Embolic strokes of undetermined source represent 20% of ischemic strokes and are associated with a high rate of recurrence. Anticoagulant treatment with rivaroxaban, an oral factor Xa inhibitor, may result in a lower risk of recurrent stroke than aspirin. Methods We compared the efficacy and safety of rivaroxaban (at a daily dose of 15 mg) with aspirin (at a daily dose of 100 mg) for the prevention of recurrent stroke in patients with recent ischemic stroke that was presumed to be from cerebral embolism but without arterial stenosis, lacune, or an identified cardioembolic source...
May 16, 2018: New England Journal of Medicine
https://www.readbyqxmd.com/read/29765425/production-of-adult-human-synovial-fluid-derived-mesenchymal-stem-cells-in-stirred-suspension-culture
#7
Kristen D Jorgenson, David A Hart, Roman Krawetz, Arindom Sen
The chondrogenic potential of synovial fluid-derived mesenchymal stem cells (SF-MSCs) supports their use in cartilage regeneration strategies. However, their paucity in synovial fluid necessitates their proliferation in culture to generate clinically relevant quantities. Here it was determined that 125 mL stirred suspension bioreactors utilizing Cytodex-3 microcarrier beads represent a viable platform for the proliferation of these cells. During the inoculation phase, a bead loading of 2 g/L, an inoculation ratio of 4...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29765052/coherent-x-rays-reveal-the-influence-of-cage-effects-on-ultrafast-water-dynamics
#8
Fivos Perakis, Gaia Camisasca, Thomas J Lane, Alexander Späh, Kjartan Thor Wikfeldt, Jonas A Sellberg, Felix Lehmkühler, Harshad Pathak, Kyung Hwan Kim, Katrin Amann-Winkel, Simon Schreck, Sanghoon Song, Takahiro Sato, Marcin Sikorski, Andre Eilert, Trevor McQueen, Hirohito Ogasawara, Dennis Nordlund, Wojciech Roseker, Jake Koralek, Silke Nelson, Philip Hart, Roberto Alonso-Mori, Yiping Feng, Diling Zhu, Aymeric Robert, Gerhard Grübel, Lars G M Pettersson, Anders Nilsson
The dynamics of liquid water feature a variety of time scales, ranging from extremely fast ballistic-like thermal motion, to slower molecular diffusion and hydrogen-bond rearrangements. Here, we utilize coherent X-ray pulses to investigate the sub-100 fs equilibrium dynamics of water from ambient conditions down to supercooled temperatures. This novel approach utilizes the inherent capability of X-ray speckle visibility spectroscopy to measure equilibrium intermolecular dynamics with lengthscale selectivity, by measuring oxygen motion in momentum space...
May 15, 2018: Nature Communications
https://www.readbyqxmd.com/read/29764892/intense-exercise-for-survival-among-men-with-metastatic-castrate-resistant-prostate-cancer-interval-gap4-a-multicentre-randomised-controlled-phase-iii-study-protocol
#9
Robert U Newton, Stacey A Kenfield, Nicolas H Hart, June M Chan, Kerry S Courneya, James Catto, Stephen P Finn, Rosemary Greenwood, Daniel C Hughes, Lorelei Mucci, Stephen R Plymate, Stephan F E Praet, Emer M Guinan, Erin L Van Blarigan, Orla Casey, Mark Buzza, Sam Gledhill, Li Zhang, Daniel A Galvão, Charles J Ryan, Fred Saad
INTRODUCTION: Preliminary evidence supports the beneficial role of physical activity on prostate cancer outcomes. This phase III randomised controlled trial (RCT) is designed to determine if supervised high-intensity aerobic and resistance exercise increases overall survival (OS) in patients with metastatic castrate-resistant prostate cancer (mCRPC). METHODS AND ANALYSIS: Participants (n=866) must have histologically documented metastatic prostate cancer with evidence of progressive disease on androgen deprivation therapy (defined as mCRPC)...
May 14, 2018: BMJ Open
https://www.readbyqxmd.com/read/29764257/collaboration-in-the-design-and-delivery-of-a-mental-health-recovery-college-course-experiences-of-students-and-tutors
#10
Josh Cameron, Angie Hart, Saff Brooker, Paul Neale, Mair Reardon
BACKGROUND: Recovery Colleges address mental health challenges using an educative approach underpinned by a collaborative recovery orientated philosophy. Research has been limited with no studies identified reporting research on the design and delivery of a specific course. AIMS: To understand how Recovery College students and tutors experience the design and delivery of a mental health Recovery College course, specifically the "'Building Resilience" course...
May 15, 2018: Journal of Mental Health
https://www.readbyqxmd.com/read/29761652/vitamin-d-status-and-associated-genetic-polymorphisms-in-a-cohort-of-uk-children-with-non-alcoholic-fatty-liver-disease
#11
P S Gibson, A Quaglia, A Dhawan, H Wu, S Lanham-New, K H Hart, E Fitzpatrick, J B Moore
BACKGROUND: Vitamin D deficiency has been associated with non-alcoholic fatty liver disease (NAFLD). However, the role of polymorphisms determining vitamin D status remains unknown. OBJECTIVES: The objectives of this study were to determine in UK children with biopsy-proven NAFLD (i) their vitamin D status throughout a 12-month period and (ii) interactions between key vitamin D-related genetic variants (nicotinamide adenine dinucleotide synthase-1/dehydrocholesterol reductase-7, vitamin D receptor, group-specific component, CYP2R1) and disease severity...
May 14, 2018: Pediatric Obesity
https://www.readbyqxmd.com/read/29760671/emotion-in-stories-facial-emg-evidence-for-both-mental-simulation-and-moral-evaluation
#12
Björn 't Hart, Marijn E Struiksma, Anton van Boxtel, Jos J A van Berkum
Facial electromyography research shows that corrugator supercilii ("frowning muscle") activity tracks the emotional valence of linguistic stimuli. Grounded or embodied accounts of language processing take such activity to reflect the simulation or "reenactment" of emotion, as part of the retrieval of word meaning (e.g., of "furious") and/or of building a situation model (e.g., for "Mark is furious"). However, the same muscle also expresses our primary emotional evaluation of things we encounter...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29760160/development-of-a-novel-clinical-staging-model-for-cirrhosis-using-the-nationwide-inpatient-sample
#13
Mona Haj, Mary Hart, Don C Rockey
Scoring systems such as Model for End-stage Liver Disease (MELD) and Child-Pugh are often used by clinicians to determine prognosis in patients with cirrhosis. Since clinical complications are important in determining cirrhosis outcomes, our goal was to use these to develop a novel prognostic staging model. Data from the Nationwide Inpatient Sample (NIS), years 2003-2011, were queried for records of patients over the age of 18 with cirrhosis excluding patients with prior or inpatient liver transplantation. The primary outcome was inpatient mortality with focus on cirrhosis-related complications: non-bleeding esophageal varices, variceal hemorrhage, ascites, hepatic encephalopathy (HE), spontaneous bacterial peritonitis (SBP), and hepatorenal syndrome (HRS)...
May 14, 2018: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/29760070/pacing-of-paleozoic-macroevolutionary-rates-by-milankovitch-grand-cycles
#14
James S Crampton, Stephen R Meyers, Roger A Cooper, Peter M Sadler, Michael Foote, David Harte
Periodic fluctuations in past biodiversity, speciation, and extinction have been proposed, with extremely long periods ranging from 26 to 62 million years, although forcing mechanisms remain speculative. In contrast, well-understood periodic Milankovitch climate forcing represents a viable driver for macroevolutionary fluctuations, although little evidence for such fluctuation exists except during the Late Cenozoic. The reality, magnitude, and drivers of periodic fluctuations in macroevolutionary rates are of interest given long-standing debate surrounding the relative roles of intrinsic biotic interactions vs...
May 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29758661/symmetry-and-input-cluster-synchronization-in-networks
#15
Abu Bakar Siddique, Louis Pecora, Joseph D Hart, Francesco Sorrentino
We study cluster synchronization in networks and show that the stability of all possible cluster synchronization patterns depends on a small set of Lyapunov exponents. Our approach can be applied to clusters corresponding to both orbital partitions of the network nodes (symmetry-cluster synchronization) and equitable partitions of the network nodes (input-cluster synchronization). Our results are verified experimentally in networks of coupled optoelectronic oscillators.
April 2018: Physical Review. E
https://www.readbyqxmd.com/read/29758594/phox2b-is-a-reliable-immunomarker-in-distinguishing-peripheral-neuroblastic-tumors-from-cns-embryonal-tumors
#16
Sanda Alexandrescu, Vera Paulson, Adrian Dubuc, Azra Ligon, Hart G Lidov
INTRODUCTION: The PHOX2B gene regulates neuronal maturation in the brain stem nuclei associated with cardiorespiratory function, and in the autonomic sympathetic and enteric nervous system. PHOX2B expression is a reliable immunomarker for peripheral neuroblastic tumors, however no systematic evaluation of CNS embryonal tumors was included in the studies. We encountered two cases in which the differential diagnosis included neuroblastoma and CNS embryonal tumor, and we hypothesized that PHOX2B immunostain would be helpful establishing the diagnosis...
May 14, 2018: Histopathology
https://www.readbyqxmd.com/read/29756327/use-of-radioiodine-131-scan-to-measure-influence-of-surgical-discipline-practice-and-volume-on-residual-thyroid-tissue-after-total-thyroidectomy-for-differentiated-thyroid-carcinoma
#17
Jin Soo A Song, Nico Moolman, Steven Burrell, Murali Rajaraman, Martin Joseph Bullock, Jonathan Trites, S Mark Taylor, Matthew H Rigby, Robert D Hart
BACKGROUND: Our study's purpose is to determine the influence of surgical discipline, surgeon site, and volume on remnant thyroid tissue visualized on radioactive iodine-131 (I-131) scans after total thyroidectomy and I-131 ablation in patients with well-differentiated thyroid carcinomas. METHODS: We retrospectively reviewed all cases of patients who received I-131 therapeutic ablation and postablation radioactive I-131 scans at our center after thyroidectomy to calculate the fraction of administered dose multiplied by 1000 (UDR1000)...
May 13, 2018: Head & Neck
https://www.readbyqxmd.com/read/29755683/increased-mucosal-expression-of-mir-215-precedes-the-development-of-neoplasia-in-patients-with-long-standing-ulcerative-colitis
#18
Joel Pekow, Katherine Meckel, Urszula Dougherty, Haider I Haider, Zifeng Deng, John Hart, David T Rubin, Marc Bissonnette
Identification of biological markers predicting the onset of neoplasia in patients with long-standing ulcerative colitis (UC) could allow for risk stratification in this population. In this study, we retrospectively identified subjects with chronic UC who developed colon neoplasia ( n = 16) matched to UC patients who never developed neoplasia. RNA was extracted from archived colonic biopsies obtained at an interval of 1-2 years prior and 3-5 years prior to the onset of neoplasia. miRNA expression was assessed using Nanostring arrays in 12 subjects, and significantly up-regulated miRNAs were evaluated by real time pcr in the entire cohort of patients...
April 17, 2018: Oncotarget
https://www.readbyqxmd.com/read/29755669/a-stitch-in-time-saves-nine-external-quality-assessment-rounds-demonstrate-improved-quality-of-biomarker-analysis-in-lung-cancer
#19
Cleo Keppens, Véronique Tack, Nils 't Hart, Lien Tembuyser, Ales Ryska, Patrick Pauwels, Karen Zwaenepoel, Ed Schuuring, Florian Cabillic, Luigi Tornillo, Arne Warth, Wilko Weichert, Elisabeth Dequeker
Biomarker analysis has become routine practice in the treatment of non-small cell lung cancer (NSCLC). To ensure high quality testing, participation to external quality assessment (EQA) schemes is essential. This article provides a longitudinal overview of the EQA performance for EGFR , ALK , and ROS1 analyses in NSCLC between 2012 and 2015. The four scheme years were organized by the European Society of Pathology according to the ISO 17043 standard. Participants were asked to analyze the provided tissue using their routine procedures...
April 17, 2018: Oncotarget
https://www.readbyqxmd.com/read/29754982/computed-tomography-techniques-help-understand-wear-patterns-in-retrieved-total-knee-arthroplasty
#20
Arianna Cerquiglini, Johann Henckel, Harry S Hothi, Lorenzo Dall'Ava, Paul Shearing, Michael T Hirschmann, Alister J Hart
BACKGROUND: Suboptimal total knee arthroplasty (TKA) position of both femoral and tibial components is thought to be linked with poor clinical outcomes, polyethylene wear and the "unexplained" painful knee arthroplasty. The aim of this study was to better understand the effect of implant orientation on knee implant performance. METHODS: We analyzed 30 retrieved contemporary TKA implants. Implant positioning measurements in the coronal plane were made prior to revision using a diagnostic algorithm, based on 3D computed tomography (CT) images...
April 16, 2018: Journal of Arthroplasty
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