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https://www.readbyqxmd.com/read/28099397/the-effects-of-attention-problems-on-psychosocial-functioning-in-childhood-brain-tumor-survivors-a-2-year-postcraniospinal-irradiation-follow-up
#1
Yunhye Oh, Hyunjung Seo, Ki Woong Sung, Yoo Sook Joung
OBJECTIVE: To examine the psychosocial outcomes and impact of attention problems in survivors of pediatric brain tumor. STUDY DESIGN: The survivors' cognitive functioning was measured using the Wechsler Intelligence Scale for Children. The Child Behavior Checklist-Attention Problems scale was used to screen for attention problems, and participants were classified as having attention problems (n=15) or normal attention (n=36). Psychosocial functioning was examined with the Korean Personality Rating scale for Children (K-PRC) at precraniospinal radiation and at 2-year follow-up...
January 17, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28087428/polycomb-complexes-prc1-and-their-function-in-hematopoiesis
#2
REVIEW
Miguel Vidal, Katharzina Starowicz
Hematopoiesis, the process by which blood cells are continuously produced, is one of the best studied differentiation pathways. Hematological diseases are associated to reiterated mutations in genes encoding important gene expression regulators, including chromatin regulators. Among them, the Polycomb group (PcG) of proteins is an essential system of gene silencing involved in the maintenance of cell identities during differentiation. PcG proteins assemble into two major types of Polycomb repressive complexes (PRC) endowed with distinct histone tail modifying activities...
January 10, 2017: Experimental Hematology
https://www.readbyqxmd.com/read/28069891/governing-the-silencing-state-of-chromatin-the-roles-of-polycomb-repressive-complex-1-in-arabidopsis
#3
Xianli Yang, Aizi Tong, Bowen Yan, Xiaoxue Wang
Polycomb group proteins form multiple protein complexes such as polycomb repressive complex (PRC) 1 and PRC2, which repress the expression of thousands of genes. PRC1 and PRC2 are essential for normal development in Arabidopsis Recently, significant progress has been made in understanding the functions and regulatory mechanisms of PRC1. In this review, we focus on the discovery of the composition of PRC1, functions of its components, the recruitment of PRC1 to target genes, and the control of PRC1 function in Arabidopsis Perspectives on dissecting the roles of PRC1 in plant gene expression and development are also given...
January 9, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28060203/predictors-of-employment-outcomes-in-veterans-with-traumatic-brain-injury-a-va-traumatic-brain-injury-model-systems-study
#4
Christina Dillahunt-Aspillaga, Risa Nakase-Richardson, Tessa Hart, Gail Powell-Cope, Laura E Dreer, Blessen C Eapen, Scott D Barnett, Dave Mellick, Adam Haskin, Marc A Silva
OBJECTIVES: To examine the length of time to return to work (RTW) among service members and veterans (SM/V) with traumatic brain injury (TBI) and to identify variables predictive of RTW. SETTING: Department of Veterans Affairs Polytrauma Rehabilitation Centers (VA PRC). PARTICIPANTS: SM/V enrolled in the VA PRC Traumatic Brain Injury Model Systems database who were of 18 to 60 years of age and admitted with the diagnosis of TBI. DESIGN: Prospective observational cohort study...
January 5, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/28044994/influence-of-l-carnitine-on-stored-rat-blood-a-study-on-plasma
#5
Carl Hsieh, Vani Rajashekharaiah
OBJECTIVE: Plasma acts as a good indicator of oxidative stress in blood. L-carnitine is an antioxidant that reduces metabolic stress in cells, thereby providing a protective effect against oxidative stress. L-carnitine as an additive in storage has not been explored. Thus, this study attempts to analyze the role of L-carnitine in blood storage solution, Citrate Phosphate Dextrose Adenine (CPDA)-1 through oxidative stress (OS) markers - antioxidant enzymes, lipid peroxidation and protein oxidation...
December 30, 2016: Turkish Journal of Haematology: Official Journal of Turkish Society of Haematology
https://www.readbyqxmd.com/read/28029355/medial-temporal-lobe-reinstatement-of-content-specific-details-predicts-source-memory
#6
Jackson C Liang, Alison R Preston
Leading theories propose that when remembering past events, medial temporal lobe (MTL) structures reinstate the neural patterns that were active when those events were initially encoded. Accurate reinstatement is hypothesized to support detailed recollection of memories, including their source. While several studies have linked cortical reinstatement to successful retrieval, indexing reinstatement within the MTL network and its relationship to memory performance has proved challenging. Here, we addressed this gap in knowledge by having participants perform an incidental encoding task, during which they visualized people, places, and objects in response to adjective cues...
October 12, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27994096/paediatric-rheumatology-clinic-population-in-southeast-asia-are-we-different
#7
Thaschawee Arkachaisri, Swee-Ping Tang, Tassalapa Daengsuwan, Gun Phongsamart, Soamarat Vilaiyuk, Sirirat Charuvanij, Sook Fun Hoh, Justin Hung Tiong Tan, Lena Das, Elizabeth Ang, Wendy Lim, Yiong Huak Chan, Christine B Bernal
OBJECTIVES: To examine the descriptive epidemiology of the patient population referred to paediatric rheumatology centres (PRCs) in Southeast Asia (SEA) and to compare the frequency of conditions encountered with other PRC populations. METHODS: A web-based Registry for Childhood Onset Paediatric Rheumatic Diseases was established in 2009 and seven PRCs in four SEA countries, where paediatric rheumatologists are available, participated in a prospective 24 month data collection (43 months for Singapore)...
December 19, 2016: Rheumatology
https://www.readbyqxmd.com/read/27993468/heavy-metal-removal-capacity-of-individual-components-of-permeable-reactive-concrete
#8
Ryan R Holmes, Megan L Hart, John T Kevern
Permeable reactive barriers (PRBs) are a well-known technique for groundwater remediation using industrialized reactive media such as zero-valent iron and activated carbon. Permeable reactive concrete (PRC) is an alternative reactive medium composed of relatively inexpensive materials such as cement and aggregate. A variety of multimodal, simultaneous processes drive remediation of metals from contaminated groundwater within PRC systems due to the complex heterogeneous matrix formed during cement hydration...
January 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/27941796/dynamics-of-baf-polycomb-complex-opposition-on-heterochromatin-in-normal-and-oncogenic-states
#9
Cigall Kadoch, Robert T Williams, Joseph P Calarco, Erik L Miller, Christopher M Weber, Simon M G Braun, John L Pulice, Emma J Chory, Gerald R Crabtree
The opposition between Polycomb repressive complexes (PRCs) and BAF (mSWI/SNF) complexes has a critical role in both development and disease. Mutations in the genes encoding BAF subunits contribute to more than 20% of human malignancies, yet the underlying mechanisms remain unclear, owing largely to a lack of assays to assess BAF function in living cells. To address this, we have developed a widely applicable recruitment assay system through which we find that BAF opposes PRC by rapid, ATP-dependent eviction, leading to the formation of accessible chromatin...
December 12, 2016: Nature Genetics
https://www.readbyqxmd.com/read/27941795/smarca4-atpase-mutations-disrupt-direct-eviction-of-prc1-from-chromatin
#10
Benjamin Z Stanton, Courtney Hodges, Joseph P Calarco, Simon M G Braun, Wai Lim Ku, Cigall Kadoch, Keji Zhao, Gerald R Crabtree
Trithorax-group proteins and their mammalian homologs, including those in BAF (mSWI/SNF) complexes, are known to oppose the activity of Polycomb repressive complexes (PRCs). This opposition underlies the tumor-suppressive role of BAF subunits and is expected to contribute to neurodevelopmental disorders. However, the mechanisms underlying opposition to Polycomb silencing are poorly understood. Here we report that recurrent disease-associated mutations in BAF subunits induce genome-wide increases in PRC deposition and activity...
December 12, 2016: Nature Genetics
https://www.readbyqxmd.com/read/27928494/synthetically-tuneable-biomimetic-artificial-photosynthetic-reaction-centres-that-closely-resemble-the-natural-system-in-purple-bacteria
#11
Sai-Ho Lee, Iain M Blake, Allan G Larsen, James A McDonald, Kei Ohkubo, Shunichi Fukuzumi, Jeffrey R Reimers, Maxwell J Crossley
Porphyrin-based photosynthetic reaction centre (PRC) mimics, ZnPQ-Q2HP-C60 and MP2Q-Q2HP-C60 (M = Zn or 2H), designed to have a similar special-pair electron donor and similar charge-separation distances, redox processes and photochemical reaction rates to those in the natural PRC from purple bacteria, have been synthesised and extensive photochemical studies performed. Mechanisms of electron-transfer reactions are fully investigated using femtosecond and nanosecond transient absorption spectroscopy. In benzonitrile, all models show picosecond-timescale charge-separations and the final singlet charge-separations with the microsecond-timescale...
October 19, 2016: Chemical Science
https://www.readbyqxmd.com/read/27927750/mdm2-as-a-chromatin-modifier
#12
REVIEW
Magdalena Wienken, Ute M Moll, Matthias Dobbelstein
Mdm2 is the key negative regulator of the tumour suppressor p53, making it an attractive target for anti-cancer drug design. We recently identified a new role of Mdm2 in gene repression through its direct interaction with several proteins of the polycomb group (PcG) family. PcG proteins form polycomb repressive complexes PRC1 and PRC2. PRC2 (via EZH2) mediates histone 3 lysine 27 (H3K27) trimethylation, and PRC1 (via RING1B) mediates histone 2A lysine 119 (H2AK119) monoubiquitination. Both PRCs mostly support a compact and transcriptionally silent chromatin structure...
November 9, 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27925272/analysis-of-community-level-mesocosm-data-based-on-ecologically-meaningful-dissimilarity-measures-and-data-transformation
#13
Cleo Tebby, Sandrine Joachim, Paul J Van den Brink, Jean-Marc Porcher, Rémy Beaudouin
The Principal Response Curve (PRC) method is a constrained ordination method developed specifically for the analysis of community data collected in mesocosm experiments which provides easily understood summaries and graphical representations of community response to stress. PRC is a redundancy analysis (RDA) method and is usually performed on log-transformed abundance data. The choice of a measure of dissimilarity between samples and the choice of the data transformation significantly affect the results of multivariate analysis...
December 7, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27923762/treatment-of-acute-perilunate-dislocations-orif-versus-proximal-row-carpectomy
#14
Thibaut Muller, Juan José Hidalgo Diaz, Emilie Pire, Guillaume Prunières, Sybille Facca, Philippe Liverneaux
PURPOSE: Some authors have proposed performing proximal row carpectomy (PRC) as the initial treatment for perilunate dislocations. HYPOTHESIS: The goal of this retrospective study was to compare the results of a cohort of perilunate dislocation cases that were operated by ORIF (open reduction and internal fixation) or by PRC between 2006 and 2011. METHODS: The cohort consisted of 21 men with a mean age of 33 years, who either had an isolated perilunate dislocation (7 cases) or a fracture-dislocation (14 cases)...
December 3, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27913801/the-pressure-reduction-coefficient-a-new-parameter-to-assess-aneurysmal-blood-stasis-induced-by-flow-diverters-disruptors
#15
Gregory Gascou, Riccardo Ferrara, Dominique Ambard, Mathieu Sanchez, Kyriakos Lobotesis, Franck Jourdan, Vincent Costalat
BACKGROUND AND PURPOSE: Pore density (PD), surface metal coverage (SMC) and the number of wires are all different parameters which can influence the efficacy of a flow disruptor/diverter. Nevertheless, the relative importance of a parameter to induce intra-aneurysmal blood stasis is still poorly evaluated. Therefore, comparison between devices based on a unique value is not reliable. The aim of this study was to propose a new bench top parameter (the pressure reduction coefficient (PRC; ξ)) in order to assess the global haemodynamic effect of each flow diverter/disruptor to slow flow...
December 2, 2016: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27909849/monitoring-contaminants-of-emerging-concern-from-tertiary-wastewater-treatment-plants-using-passive-sampling-modelled-with-performance-reference-compounds
#16
Tamanna Sultana, Craig Murray, M Ehsanul Hoque, Chris D Metcalfe
The Lake Simcoe watershed in Ontario, Canada is an important recreational area and a recharge zone for groundwater resources. Lake Simcoe is a relatively shallow lotic system that has been impacted by urban development, recreation, industry and agriculture. As part of a watershed management plan, six wastewater treatment plants (WWTPs) located in this catchment basin were selected to measure the inputs of contaminants of emerging concern (CECs) of wastewater origin. These WWTPs were recently upgraded to tertiary treatment for phosphorus removal...
December 2016: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27890248/proximal-row-carpectomy-on-manual-workers-17%C3%A2-patients-followed-for-an-average-of-6%C3%A2-years
#17
S Delclaux, D Israel, C Aprédoaei, M Rongières, P Mansat
: Proximal row carpectomy (PRC) is indicated for the treatment of SNAC or SLAC wrist with preservation of the midcarpal joint. Our hypothesis was that PRC is not appropriate for treating advanced wrist osteoarthritis in patients who carry out heavy manual work. Twenty-three PRCs were performed on 21 patients, 5 women and 16 men with an average age of 54 years (33-77). All patients performed manual work; 11 of them performed heavy manual work. Etiologies were: SLAC wrist in 14 cases (2 stage III, 11 stage II, and 1 stage I) and SNAC wrist in 9 cases (6 stage IIIB and 3 stage IIB)...
December 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27859925/material-specificity-drives-medial-temporal-lobe-familiarity-but-not-hippocampal-recollection
#18
Alex Kafkas, Ellen M Migo, Robin G Morris, Michael D Kopelman, Daniela Montaldi, Andrew R Mayes
The specific role of the perirhinal (PRC), entorhinal (ERC) and parahippocampal cortices (PHC) in supporting familiarity-based recognition remains unknown. An fMRI study explored whether these medial temporal lobe (MTL) structures responded in the same way or differentially to familiarity as a function of stimulus type at recognition. A secondary aim was to explore whether the hippocampus responds in the same way to equally strong familiarity and recollection and whether this is influenced by the kind of stimulus involved...
November 16, 2016: Hippocampus
https://www.readbyqxmd.com/read/27830540/multifaceted-role-of-the-polycomb-group-gene-ezh2-in-hematological-malignancies
#19
REVIEW
Goro Sashida, Atsushi Iwama
Polycomb repressive complex (PRC) is a critical regulator of normal tissue homeostasis as well as tumorigenesis. EZH2, an enzymatic subunit of PRC2, is a histone H3K27 methyltransferase that functions in the regulation of gene silencing. EZH2 overexpression was first identified in prostate and breast cancers and is associated with poor clinical outcome. Subsequently, gain- and loss-of-function mutations of EZH2 have been identified in various tumors, including hematological malignancies, implicating EZH2 as either an oncogene or a tumor suppressor gene, depending on the cancer type...
November 9, 2016: International Journal of Hematology
https://www.readbyqxmd.com/read/27824037/structure-of-the-ribosome-post-recycling-complex-probed-by-chemical-cross-linking-and-mass-spectrometry
#20
Kristin Kiosze-Becker, Alessandro Ori, Milan Gerovac, André Heuer, Elina Nürenberg-Goloub, Umar Jan Rashid, Thomas Becker, Roland Beckmann, Martin Beck, Robert Tampé
Ribosome recycling orchestrated by the ATP binding cassette (ABC) protein ABCE1 can be considered as the final-or the first-step within the cyclic process of protein synthesis, connecting translation termination and mRNA surveillance with re-initiation. An ATP-dependent tweezer-like motion of the nucleotide-binding domains in ABCE1 transfers mechanical energy to the ribosome and tears the ribosome subunits apart. The post-recycling complex (PRC) then re-initiates mRNA translation. Here, we probed the so far unknown architecture of the 1-MDa PRC (40S/30S·ABCE1) by chemical cross-linking and mass spectrometry (XL-MS)...
November 8, 2016: Nature Communications
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