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https://www.readbyqxmd.com/read/28540433/altered-tetrahydrobiopterin-metabolism-in-patients-with-phenylalanine-hydroxylase-deficiency
#1
Francesca Nardecchia, Flavia Chiarotti, Claudia Carducci, Silvia Santagata, Giulia Valentini, Antonio Angeloni, Nenad Blau, Vincenzo Leuzzi
The tetrahydrobiopterin (BH4) cofactor is essential for the activity of various enzymes, including phenylalanine (Phe) hydroxylase. In phenylketonuria (PKU) patients, who are chronically exposed to high Phe levels, high urinary excretion of BH4 metabolites neopterin and biopterin is observed. The aim of this longitudinal study was to investigate consistence and variability of the urinary excretion of pterins (neopterin and biopterin) in PKU patients in relation to age and concomitant blood Phe and tyrosine levels...
May 24, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28540161/choctaw-nation-youth-sun-exposure-survey
#2
Dorothy A Rhoades, Martina Hawkins, Barbara Norton, Dannielle Branam, Tamela K Cannady, Justin Dvorak, Kai Ding, Ardis L Olson, Mark P Doescher
The incidence of skin cancer is rising among American Indians (AI) but the prevalence of harmful ultraviolet light (UVL) exposures among AI youth is unknown. In 2013, UVL exposures, protective behaviors, and attitudes toward tanning were assessed among 129 AI and Non-Hispanic (NHW) students in grades 8-12 in Southeastern Oklahoma. Sunburn was reported by more than half the AI students and most of the NHW students. One-third of AI students reported never using sunscreen, compared to less than one-fifth of NHW students, but racial differences were mitigated by propensity to burn...
September 2017: Preventive Medicine Reports
https://www.readbyqxmd.com/read/28539881/the-influence-of-mexican-hat-recurrent-connectivity-on-noise-correlations-and-stimulus-encoding
#3
Robert Meyer, Josef Ladenbauer, Klaus Obermayer
Noise correlations are a common feature of neural responses and have been observed in many cortical areas across different species. These correlations can influence information processing by enhancing or diminishing the quality of the neural code, but the origin of these correlations is still a matter of controversy. In this computational study we explore the hypothesis that noise correlations are the result of local recurrent excitatory and inhibitory connections. We simulated two-dimensional networks of adaptive spiking neurons with local connection patterns following Gaussian kernels...
2017: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/28534620/hydrogen-atom-transfer-hat-processes-promoted-by-the-quinolinimide-n-oxyl-radical-a-kinetic-and-theoretical-study
#4
Gino A DiLabio, Paola Franchi, Osvaldo Lanzalunga, Andrea Lapi, Fiorella Lucarini, Marco Lucarini, Marco Mazzonna, Viki Kumar Prasad, Barbara Ticconi
A kinetic study of the hydrogen atom transfer (HAT) reactions from a series of organic compounds to the quinolinimide-N-oxyl radical (QINO) has been carried out in CH3CN. The HAT rate constants are significantly higher than those observed with the phthalimide-N-oxyl radical (PINO) as a result of enthalpic and polar effects due to the presence of the N-heteroaromatic ring in QINO. The relevance of polar effects is supported by theoretical calculations carried out for the reactions of the two N-oxyl radicals with toluene which indicate that the HAT process is characterized by a significant degree of charge transfer enabled by the pi-stacking that occurs in the transition state structures between the toluene and the N-oxyl aromatic rings...
May 23, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28531222/monitoring-the-elimination-of-human-african-trypanosomiasis-update-to-2014
#5
José R Franco, Giuliano Cecchi, Gerardo Priotto, Massimo Paone, Abdoulaye Diarra, Lise Grout, Raffaele C Mattioli, Daniel Argaw
BACKGROUND: The World Health Organization (WHO) has targeted the elimination of Human African trypanosomiasis (HAT) 'as a public health problem' by 2020. The selected indicators of elimination should be monitored every two years, and we provide here a comprehensive update to 2014. The monitoring system is underpinned by the Atlas of HAT. RESULTS: With 3,797 reported cases in 2014, the corresponding milestone (5,000 cases) was surpassed, and the 2020 global target of 'fewer than 2,000 reported cases per year' seems within reach...
May 22, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28528246/the-canadian-hypoglycemia-assessment-tool-program-insights-into-rates-and-implications-of-hypoglycemia-from-an-observational-study
#6
Ronnie Aronson, Ronald Goldenberg, Damir Boras, Rasmus Skovgaard, Harpreet Bajaj
OBJECTIVE: The true prevalence of hypoglycemia in insulin-treated patients with diabetes and its impact on patients, employers and healthcare providers is poorly appreciated owing to a paucity of real-world data. The global Hypoglycemia Assessment Tool (HAT) study addressed this issue, and here we report data from the Canadian cohort of patients. METHODS: This noninterventional, 6-month retrospective and 4-week prospective study enrolled patients aged ≥18 years receiving insulin treatment for >12 months from community endocrinology practices...
May 17, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/28527406/the-relevance-of-ki-calculation-for-bi-substrate-enzymes-illustrated-by-kinetic-evaluation-of-a-novel-lysine-k-acetyltransferase-8-inhibitor
#7
Hannah Wapenaar, Thea van den Bosch, Niek G J Leus, Petra E van der Wouden, Nikolaos Eleftheriadis, Jos Hermans, Gebremedhin Solomon Hailu, Dante Rotili, Antonello Mai, Alexander Dömling, Rainer Bischoff, Hidde J Haisma, Frank J Dekker
Histone acetyltransferases (HATs) are important mediators of epigenetic post-translational modifications of histones that play important roles in health and disease. A disturbance of these modifications can result in disease states, such as cancer or inflammatory diseases. Inhibitors of HATs (HATi) such as lysine (K) acetyltransferase 8 (KAT8), could be used to study the epigenetic processes in diseases related to these enzymes or to investigate HATs as therapeutic targets. However, the development of HATi is challenged by the difficulties in kinetic characterization of HAT enzymes and their inhibitors to enable calculation of a reproducible inhibitory potency...
May 5, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28525711/protein-partial-molar-volumes-in-multi-component-solutions-from-the-perspective-of-inverse-kirkwood-buff-theory
#8
Cesar Calero-Rubio, Curtis M Strab, Gregory V Barnett, Christopher J Roberts
Inverse Kirkwood-Buff (KB) solution theory can be used to relate macroscopic quantities with molecular scale interactions and correlation functions, in the form of KB integrals. Protein partial specific volumes (<HAT>V</HAT>2) from high-precision density measurements can be used to quantify solvent-solute and solute-solute KB integrals. Currently, general expressions for <HAT>V</HAT>2 as a function of co-solute concentration (c3) have been provided for only binary and ternary solutions...
May 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28525378/irf5-is-elevated-in-childhood-onset-sle-and-regulated-by-histone-acetyltransferase-and-histone-deacetylase-inhibitors
#9
Jin Shu, Ling Li, Lan-Bo Zhou, Jun Qian, Zhi-Dan Fan, Li-Li Zhuang, Lu-Lu Wang, Rui Jin, Hai-Guo Yu, Guo-Ping Zhou
Interferon regulatory factor 5 (IRF5) plays a critical role in the induction of type I interferon, proinflammatory cytokines and chemokines, and participates in the pathogenesis of autoimmune diseases such as systemic lupus erythematosus (SLE). However, the relationship between IRF5 and childhood-onset SLE remains elusive. In the present study, we demonstrated that levels of mRNA expression of IRF5, IFN-α, and Sp1 were significantly increased in childhood-onset SLE, as seen on quantitative real-time PCR, and the expression of Sp1 and IFN-α was positively correlated with IRF5...
May 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28524070/tmprss2-and-mspl-facilitate-trypsin-independent-porcine-epidemic-diarrhea-virus-replication-in-vero-cells
#10
Wen Shi, Wenlu Fan, Jing Bai, Yandong Tang, Li Wang, Yanping Jiang, Lijie Tang, Min Liu, Wen Cui, Yigang Xu, Yijing Li
Type II transmembrane serine proteases (TTSPs) facilitate the spread and replication of viruses such as influenza and human coronaviruses, although it remains unclear whether TTSPs play a role in the progression of animal coronavirus infections, such as that by porcine epidemic diarrhea virus (PEDV). In this study, TTSPs including TMPRSS2, HAT, DESC1, and MSPL were tested for their ability to facilitate PEDV replication in Vero cells. Our results showed that TMPRSS2 and MSPL played significant roles in the stages of cell-cell fusion and virus-cell fusion, whereas HAT and DESC1 exhibited weaker effects...
May 18, 2017: Viruses
https://www.readbyqxmd.com/read/28521781/telling-our-stories-heroin-assisted-treatment-and-snap-activism-in-the-downtown-eastside-of-vancouver
#11
Susan Boyd, Dave Murray, Donald MacPherson
BACKGROUND: This article highlights the experiences of a peer-run group, SALOME/NAOMI Association of Patients (SNAP), that meets weekly in the Downtown Eastside of Vancouver, British Columbia, Canada. SNAP is a unique independent peer- run drug user group that formed in 2011 following Canada's first heroin-assisted treatment trial (HAT), North America Opiate Medication Initiative (NAOMI). SNAP's members are now made up of former research participants who participated in two heroin-assisted trials in Vancouver...
May 18, 2017: Harm Reduction Journal
https://www.readbyqxmd.com/read/28521125/beyond-hat-in-hand-science-advocacy-is-foundational-for-policy-decisions
#12
Nathaniel Kendall-Taylor, Pat Levitt
Beyond those to whom neuroscientists typically communicate exciting discoveries-that is, those who can provide more funding for researchers-there are important audiences that are positioned to use neuroscience findings to affect policy and improve societal outcomes. Showing the utility of research that policymakers, service providers, and the public can use to make decisions will enhance views of the value of scientific research. The ingredients of successful communications between neuroscientists and other stakeholders are different from those that characterize effective communications between scientists...
May 17, 2017: Neuron
https://www.readbyqxmd.com/read/28518085/analysis-of-chromosome-segregation-histone-acetylation-and-spindle-morphology-in-horse-oocytes
#13
Federica Franciosi, Irene Tessaro, Rozenn Dalbies-Tran, Cecile Douet, Fabrice Reigner, Stefan Deleuze, Pascal Papillier, Ileana Miclea, Valentina Lodde, Alberto M Luciano, Ghylene Goudet
The field of assisted reproduction has been developed to treat infertility in women, companion animals, and endangered species. In the horse, assisted reproduction also allows for the production of embryos from high performers without interrupting their sports career and contributes to an increase in the number of foals from mares of high genetic value. The present manuscript describes the procedures used for collecting immature and mature oocytes from horse ovaries using ovum pick-up (OPU). These oocytes were then used to investigate the incidence of aneuploidy by adapting a protocol previously developed in mice...
May 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28515636/optic-cup-segmentation-type-ii-fuzzy-thresholding-approach-and-blood-vessel-extraction
#14
Ahmed Almazroa, Sami Alodhayb, Kaamran Raahemifar, Vasudevan Lakshminarayanan
We introduce here a new technique for segmenting optic cup using two-dimensional fundus images. Cup segmentation is the most challenging part of image processing of the optic nerve head due to the complexity of its structure. Using the blood vessels to segment the cup is important. Here, we report on blood vessel extraction using first a top-hat transform and Otsu's segmentation function to detect the curves in the blood vessels (kinks) which indicate the cup boundary. This was followed by an interval type-II fuzzy entropy procedure...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28514849/intramolecular-hydrogen-atom-transfer-in-aminyl-radical-at-room-temperature-with-large-kinetic-isotope-effect
#15
Ying Wang, Arnon Olankitwanit, Suchada Rajca, Andrzej Rajca
We report a large kinetic isotope effect at 298 K, kH/kD ≈ 150, associated with an intramolecular 1,5-hydrogen atom transfer (1,5-HAT) in the decay of a PEGylated carbazyl (aminyl) radical in solution. The experimental observations surprisingly combine the hallmarks of tunneling, including large KIEs and unusual activation parameters, with linear Arrhenius and Eyring plots over an exceptionally wide temperature range of 116 K.
May 22, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28513819/sun-exposure-sun-protection-and-sunburn-among-canadian-adults
#16
Lauren Pinault, Vitali Fioletov
BACKGROUND: Ultraviolet radiation (UVR) exposure and a history of sunburn are important risk factors for skin cancer. Sunburn is more common among men, younger age groups, and people in higher income households. Sun protection measures also vary by sex, age, and socioeconomic characteristics. Associations between ambient UVR and sunburn and sun safety measures have not been quantified. DATA AND METHODS: A total of 53,130 respondents aged 18 or older answered a Canadian Community Health Survey (CCHS) module on sun safety, which was administered in six provinces from 2005 to 2014...
May 17, 2017: Health Reports
https://www.readbyqxmd.com/read/28513251/comparison-of-the-effects-of-665-nm-low-level-diode-laser-hat-versus-and-a-combination-of-665-nm-and-808nm-low-level-diode-laser-scanner-of-hair-growth-in-androgenic-alopecia
#17
Behrooz Barikbin, Zeinab Khodamrdi, Leila Kholoosi, Mohammad Reza Akhgri, Majid Haj Abbasi, Mojgan Hajabbasi, Zahra Razzaghi, Samaneh Akbarpour
BACKGROUND: This study aimed to evaluate the effectiveness of a combined set of low level diode laser scanner (665 nm and 808nm) on hair growth, and assessment of safety and effectiveness of a new laser scanner on hair growth treatment procedure in androgenic alopecia. METHODS: 90 patients (18 to 70 years) with androgenic alopecia were randomized into three groups. The first group (n=30) received 655 nm red light using laser hat, the second group (n=30) received 655 nm red laser plus 808 nm infrared laser using a laser scanner of hair growth device (with the patent number: 77733) and the third group (n=30) received no laser as the control group...
May 17, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28508585/exploring-the-molecular-growth-of-two-gigantic-half-closed-polyoxometalate-clusters-mo180-and-mo130ce6
#18
Lee Cronin, Weimin Xuan, Robert Pow, De-Liang Long
Understanding the process of the self-assembly of gigantic polyoxometalates and their subsequent molecular growth, by the addition of capping moieties onto the oxo-frameworks, is critical for the development of the designed assembly of complex high nuclearity cluster species, yet such processes remain far from being understood. Here we describe that the molecular growth from {Mo150} and {Mo120Ce6} to afford two half-closed gigantic molybdenum blue clusters {Mo180} (1) and {Mo130Ce6} (2), respectively. 1 features a hat-shaped structure with the parent wheel-shaped {Mo150} being capped by a {Mo30} unit on one side...
May 15, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28505206/effects-of-%C3%AE-tat1-and-hdac5-on-axonal-regeneration-in-adult-neurons
#19
Shen Lin, Noelle A Sterling, Ian P Junker, Courtney T Helm, George M Smith
The role of posttranslational modifications in axonal injury and regeneration has been widely studied but there has been little consensus over the mechanism by which each modification affects adult axonal growth. Acetylation is known to play an important role in a variety of neuronal functions and its homeostasis is controlled by two enzyme families: the Histone Deacetylases (HDACs) and Histone Acetyl Transferases (HATs). Recent studies show that HDAC5 deacetylates microtubules in the axonal cytoplasm as part of an injury-induced regeneration response, but little is known about how acetylation of microtubules plays a role...
2017: PloS One
https://www.readbyqxmd.com/read/28500727/biological-function-and-histone-recognition-of-family-iv-bromodomain-containing-proteins
#20
Jonathan T Lloyd, Karen C Glass
Bromodomain proteins function as epigenetic readers that recognize acetylated histone tails to facilitate the transcription of target genes. There are approximately 60 known human bromodomains, which are divided into 8 sub-families based on structural conservation. The bromodomain-containing proteins in family IV include 7 members (BRPF1, BRPF2, BRPF3, BRD7, BRD9, ATAD2 and ATAD2b). The bromodomains of each of these proteins recognize and bind acetyllysine residues on histone tails protruding from the nucleosome...
May 13, 2017: Journal of Cellular Physiology
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