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https://www.readbyqxmd.com/read/28102155/surgical-treatment-of-radial-head-fractures-outcomes-and-complications
#1
Bartosz Chwedczuk, Piotr Piekarczyk, Krzysztof Kwiatkowski, Krzysztof Piątkowski
BACKGROUND: Appropriate treatment of radial head fractures remains an area of disputes and controversy. The present paper aims to assess the outcomes of surgical fixation of these injuries and identify the most common complications. MATERIAL AND METHODS: The medical records of 63 patients (25 women and 38 men) treated in 2011 -2014 were analysed retrospectively. The treatment outcomes were assessed according to the Broberg and Morrey rating system and the QuickDASH score...
October 28, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28067620/characterisation-of-the-opposing-effects-of-g6pd-deficiency-on-cerebral-malaria-and-severe-malarial-anaemia
#2
Geraldine M Clarke, Kirk Rockett, Katja Kivinen, Christina Hubbart, Anna E Jeffreys, Kate Rowlands, Muminatou Jallow, David J Conway, Kalifa A Bojang, Margaret Pinder, Stanley Usen, Fatoumatta Sisay-Joof, Giorgio Sirugo, Ousmane Toure, Mahamadou A Thera, Salimata Konate, Sibiry Sissoko, Amadou Niangaly, Belco Poudiougou, Valentina D Mangano, Edith C Bougouma, Sodiomon B Sirima, David Modiano, Lucas N Amenga-Etego, Anita Ghansah, Kwadwo A Koram, Michael D Wilson, Anthony Enimil, Jennifer Evans, Olukemi K Amodu, Subulade Olaniyan, Tobias Apinjoh, Regina Mugri, Andre Ndi, Carolyne M Ndila, Sophie Uyoga, Alexander Macharia, Norbert Peshu, Thomas N Williams, Alphaxard Manjurano, Nuno Sepúlveda, Taane G Clark, Eleanor Riley, Chris Drakeley, Hugh Reyburn, Vysaul Nyirongo, David Kachala, Malcolm Molyneux, Sarah J Dunstan, Nguyen Hoan Phu, Nguyen Ngoc Quyen, Cao Quang Thai, Tran Tinh Hien, Laurens Manning, Moses Laman, Peter Siba, Harin Karunajeewa, Steve Allen, Angela Allen, Timothy Me Davis, Pascal Michon, Ivo Mueller, Síle F Molloy, Susana Campino, Angeliki Kerasidou, Victoria J Cornelius, Lee Hart, Shivang S Shah, Gavin Band, Chris Ca Spencer, Tsiri Agbenyega, Eric Achidi, Ogobara K Doumbo, Jeremy Farrar, Kevin Marsh, Terrie Taylor, Dominic P Kwiatkowski
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is believed to confer protection against Plasmodium falciparum malaria, but the precise nature of the protective effecthas proved difficult to define as G6PD deficiency has multiple allelic variants with different effects in males and females, and it has heterogeneous effects on the clinical outcome of P. falciparum infection. Here we report an analysis of multiple allelic forms of G6PD deficiency in a large multi-centre case-control study of severe malaria, using the WHO classification of G6PD mutations to estimate each individual's level of enzyme activity from their genotype...
January 9, 2017: ELife
https://www.readbyqxmd.com/read/28032307/intravenous-enalaprilat-for-treatment-of-acute-hypertensive-heart-failure-in-the-emergency-department
#3
Syed Imran Ayaz, Craig M Sharkey, Gregory M Kwiatkowski, Suprat Saely Wilson, Reba S John, Rosa Tolomello, Arushi Mahajan, Scott Millis, Phillip D Levy
BACKGROUND: Afterload reduction with bolus enalaprilat is used by some for management of acute hypertensive heart failure (HF) but existing data on the safety and effectiveness of this practice are limited. The purpose of this study was to evaluate the clinical effects of bolus enalaprilat when administered to patients with acute hypertensive heart failure. FINDINGS: We performed an IRB-approved retrospective cohort study of patients who presented to the emergency department of a large urban academic hospital...
December 2016: International Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27998271/whole-genome-sequencing-of-plasmodium-falciparum-from-dried-blood-spots-using-selective-whole-genome-amplification
#4
Samuel O Oyola, Cristina V Ariani, William L Hamilton, Mihir Kekre, Lucas N Amenga-Etego, Anita Ghansah, Gavin G Rutledge, Seth Redmond, Magnus Manske, Dushyanth Jyothi, Chris G Jacob, Thomas D Otto, Kirk Rockett, Chris I Newbold, Matthew Berriman, Dominic P Kwiatkowski
BACKGROUND: Translating genomic technologies into healthcare applications for the malaria parasite Plasmodium falciparum has been limited by the technical and logistical difficulties of obtaining high quality clinical samples from the field. Sampling by dried blood spot (DBS) finger-pricks can be performed safely and efficiently with minimal resource and storage requirements compared with venous blood (VB). Here, the use of selective whole genome amplification (sWGA) to sequence the P...
December 20, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27994033/extreme-mutation-bias-and-high-at-content-in-plasmodium-falciparum
#5
William L Hamilton, Antoine Claessens, Thomas D Otto, Mihir Kekre, Rick M Fairhurst, Julian C Rayner, Dominic Kwiatkowski
For reasons that remain unknown, the Plasmodium falciparum genome has an exceptionally high AT content compared to other Plasmodium species and eukaryotes in general - nearly 80% in coding regions and approaching 90% in non-coding regions. Here, we examine how this phenomenon relates to genome-wide patterns of de novo mutation. Mutation accumulation experiments were performed by sequential cloning of six P. falciparum isolates growing in human erythrocytes in vitro for 4 years, with 279 clones sampled for whole genome sequencing at different time points...
December 19, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27992645/crystal-structures-of-bacterial-6-4-photolyase-mutants-with-impaired-dna-repair-activity
#6
Fan Zhang, Hongju Ma, Kalinga Bowatte, Dennis Kwiatkowski, Esther Mittmann, Heba Qasem, Norbert Krauss, Xiaoli Zeng, Zhong Ren, Patrick Scheerer, Xiaojing Yang, Tilman Lamparter
PhrB from Agrobacterium fabrum is the first prokaryotic photolyase which repairs (6-4) UV DNA-photoproducts. The protein harbors three cofactors, the enzymatically active FAD chromophore, a second chromophore, 6,7-dimethyl-8-ribityllumazine (DMRL) and a cubane-type Fe-S cluster. Tyr424 of PhrB is part of the DNA binding site and could provide an electron link to the Fe-S cluster. The PhrBY424F mutant showed reduced binding of lesion DNA and loss of DNA repair. The mutant PhrBI51W , is characterized by the loss of the DMRL chromophore, reduced photoreduction and reduced DNA repair capacity...
December 19, 2016: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/27991443/hydrostatic-pressure-induced-changes-of-magnetic-anisotropy-in-ga-mn-as-thin-films
#7
Marta Gryglas-Borysiewicz, Piotr Juszynski, Adam Kwiatkowski, Jacek Przybytek, Janusz Sadowski, Maciej Sawicki, Mateusz Tokarczyk, Grzegorz Kowalski, Tomasz Dietl, D Wasik
The impact of the hydrostatic pressure on magnetic anisotropy energies in (Ga,Mn)As thin films with in-plane and out-of-plane magnetic easy axis, predefined by epitaxial strain was investigated. In both types of samples we have observed a clear increase of both in-plane and out-of-plane anisotropy parameters with pressure. The out-of-plane anisotropy constant is well reproduced by the mean-field p-d Zener model, however, the changes of the uniaxial anisotropy are much larger than expected in the Mn-Mn dimmer scenario...
December 19, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/27973827/impact-of-salt-co-and-counterions-on-rheological-properties-and-structure-of-wormlike-micellar-solutions
#8
Alexander L Kwiatkowski, Vyacheslav S Molchanov, Anton S Orekhov, Alexander L Vasiliev, Olga E Philippova
Rheological properties of aqueous solutions of long-tailed cationic surfactant erucyl bis-(hydroxyethyl)methylammonium chloride (EHAC) were examined as a function of concentration Cs of different inorganic salts (KCl, CaCl2, and LaCl3) at a fixed surfactant concentration of 0.6 wt %. The structural evolution of micelles was followed by small-angle neutron scattering and cryogenic transmission electron microscopy. It was observed that, upon addition of salt, the zero-shear viscosity η0 of semidilute surfactant solutions goes through a maximum by passing the following three regimes: η0 ∼ Cs(10) (regime I), η0 ∼ Cs(3...
December 15, 2016: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/27969671/tct-325-the-effects-of-types-of-guidewires-and-pressure-applied-during-stent-implantation-in-the-main-vessel-on-the-incidence-of-damage-to-coronary-guidewires-during-angioplasty-of-coronary-bifurcation-lesions-wide-beast-study
#9
Piotr Kwiatkowski, Edyta Sutkowska, Jerzy Malachowski, Wioletta Jakubas-Kwiatkowska, Slawomir Golebiewski, Robert Gil
No abstract text is available yet for this article.
November 1, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27934010/ribosomal-peptide-syntheses-from-activated-substrates-reveal-rate-limitation-by-an-unexpected-step-at-the-peptidyl-site
#10
Jinfan Wang, Marek Kwiatkowski, Anthony C Forster
Protein synthesis (translation) is central to cellular function and antibiotic development. Interestingly, the key chemical step of translation, peptide bond formation, is among the slower enzymatic reactions. The reason for this remains controversial because of reliance on studies using highly modified, severely minimized, or unreactive substrate analogues. Here, we investigated this problem by fast kinetics using full-length aminoacyl-tRNA substrates with atomic substitutions that activated the ester electrophile...
December 7, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27933102/a-polysaccharide-utilization-locus-from-flavobacterium-johnsoniae-enables-conversion-of-recalcitrant-chitin
#11
Johan Larsbrink, Yongtao Zhu, Sampada S Kharade, Kurt J Kwiatkowski, Vincent G H Eijsink, Nicole M Koropatkin, Mark J McBride, Phillip B Pope
BACKGROUND: Chitin is the second most abundant polysaccharide on earth and as such a great target for bioconversion applications. The phylum Bacteroidetes is one of nature's most ubiquitous bacterial lineages and is essential in the global carbon cycle with many members being highly efficient degraders of complex carbohydrates. However, despite their specialist reputation in carbohydrate conversion, mechanisms for degrading recalcitrant crystalline polysaccharides such as chitin and cellulose are hitherto unknown...
2016: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/27921095/journey-from-the-center-of-the-cell-the-intra-and-intercellular-transport-of-mrna
#12
REVIEW
Anna Kasprowicz-Maluśki, Wojciech Kwiatkowski, Alicja Starosta, Przemysław Wojtaszek
Transport and localized translation of mRNA is crucial for the proper spatiotemporal organization of proteins within cells. Distribution of RNAs to subcellular domains has recently emerged as a major mechanism for establishing functionally distinct compartments and structures in the cells. There is an emerging evidence that active transport of mRNA involves cytoskeleton and membrane trafficking pathways in fungi, plants and animals, suggesting that it is a common phenomenon among eukaryotes. The important highlights are that the RNA-binding proteins recognize the cargo mRNA and that RNPs are actively transported on the cytoskeletal tracks or co-transported with membranous compartments, such as the endoplasmic reticulum and endosomes...
2016: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/27918305/tuberous-sclerosis-complex-inactivation-disrupts-melanogenesis-via-mtorc1-activation
#13
Juxiang Cao, Magdalena E Tyburczy, Joel Moss, Thomas N Darling, Hans R Widlund, David J Kwiatkowski
Tuberous sclerosis complex (TSC) is an autosomal dominant tumor-suppressor gene syndrome caused by inactivating mutations in either TSC1 or TSC2, and the TSC protein complex is an essential regulator of mTOR complex 1 (mTORC1). Patients with TSC develop hypomelanotic macules (white spots), but the molecular mechanisms underlying their formation are not fully characterized. Using human primary melanocytes and a highly pigmented melanoma cell line, we demonstrate that reduced expression of either TSC1 or TSC2 causes reduced pigmentation through mTORC1 activation, which results in hyperactivation of glycogen synthase kinase 3β (GSK3β), followed by phosphorylation of and loss of β-catenin from the nucleus, thereby reducing expression of microphthalmia-associated transcription factor (MITF), and subsequent reductions in tyrosinase and other genes required for melanogenesis...
January 3, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/27907099/analysis-of-a-mouse-skin-model-of-tuberous-sclerosis-complex
#14
Yanan Guo, John R Dreier, Juxiang Cao, Heng Du, Scott R Granter, David J Kwiatkowski
Tuberous Sclerosis Complex (TSC) is an autosomal dominant tumor suppressor gene syndrome in which patients develop several types of tumors, including facial angiofibroma, subungual fibroma, Shagreen patch, angiomyolipomas, and lymphangioleiomyomatosis. It is due to inactivating mutations in TSC1 or TSC2. We sought to generate a mouse model of one or more of these tumor types by targeting deletion of the Tsc1 gene to fibroblasts using the Fsp-Cre allele. Mutant, Tsc1ccFsp-Cre+ mice survived a median of nearly a year, and developed tumors in multiple sites but did not develop angiomyolipoma or lymphangioleiomyomatosis...
2016: PloS One
https://www.readbyqxmd.com/read/27899999/colorectal-cancer-patients-exhibit-increased-levels-of-galanin-in-serum-and-colon-tissues
#15
Przemysław Kwiatkowski, Janusz Godlewski, Jacek Kieżun, Bartłomiej Emil Kraziński, Zbigniew Kmieć
Galanin (GAL) is a 30-amino acid neuropeptide that is expressed in both the central and peripheral nervous system, including the enteric nervous system (ENS). Increased GAL concentrations have been identified in the blood of colorectal cancer (CRC) patients. The aim of the present study was to assess whether sections of the colon wall containing ENS plexuses or CRC tumor are associated with increased GAL concentrations. Blood samples were collected from 68 CRC patients and 39 healthy volunteers. In addition, samples of CRC tumors and colon wall tissue in close proximity to and distant from the neoplastic tissue were obtained from 22 CRC patients...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27899115/characterizing-the-impact-of-sustained-sulfadoxine-pyrimethamine-use-upon-the-plasmodium-falciparum-population-in-malawi
#16
Matt Ravenhall, Ernest Diez Benavente, Mwapatsa Mipando, Anja T R Jensen, Colin J Sutherland, Cally Roper, Nuno Sepúlveda, Dominic P Kwiatkowski, Jacqui Montgomery, Kamija S Phiri, Anja Terlouw, Alister Craig, Susana Campino, Harold Ocholla, Taane G Clark
BACKGROUND: Malawi experienced prolonged use of sulfadoxine/pyrimethamine (SP) as the front-line anti-malarial drug, with early replacement of chloroquine and delayed introduction of artemisinin-based combination therapy. Extended use of SP, and its continued application in pregnancy is impacting the genomic variation of the Plasmodium falciparum population. METHODS: Whole genome sequence data of P. falciparum isolates covering 2 years of transmission within Malawi, alongside global datasets, were used...
November 29, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27898193/modeling-long-term-changes-in-tundra-carbon-balance-following-wildfire-climate-change-and-potential-nutrient-addition
#17
Yueyang Jiang, Edward B Rastetter, Gaius R Shaver, Adrian V Rocha, Qianlai Zhuang, Bonnie L Kwiatkowski
To investigate the underlying mechanisms that control long-term recovery of tundra carbon (C) and nutrients after fire, we employed the Multiple Element Limitation (MEL) model to simulate 200-yr post-fire changes in the biogeochemistry of three sites along a burn severity gradient in response to increases in air temperature, CO2 concentration, nitrogen (N) deposition, and phosphorus (P) weathering rates. The simulations were conducted for severely burned, moderately burned, and unburned arctic tundra. Our simulations indicated that recovery of C balance after fire was mainly determined by the internal redistribution of nutrients among ecosystem components (controlled by air temperature), rather than the supply of nutrients from external sources (e...
August 4, 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27895843/severe-anemia-in-malawian-children
#18
Job Cj Calis, Kamija S Phiri, E Brian Faragher, Bernard J Brabin, Imelda Bates, Luis E Cuevas, Rob J de Haan, Ajib I Phiri, Pelani Malange, Mirriam Khoka, Paul Jm Hulshof, Lisette van Lieshout, Marcel Ghm Beld, Yik Y Teo, Kirk A Rockett, Anna Richardson, Dominic P Kwiatkowski, Malcolm E Molyneux, Michaël Boele van Hensbroek
BACKGROUND: Severe anemia is a major cause of sickness and death in African children, yet the causes of anemia in this population have been inadequately studied. METHODS: We conducted a case-control study of 381 preschool children with severe anemia (hemoglobin concentration, <5.0 g per deciliter) and 757 preschool children without severe anemia in urban and rural settings in Malawi. Causal factors previously associated with severe anemia were studied. The data were examined by multivariate analysis and structural equation modeling...
September 2016: Malawi Medical Journal: the Journal of Medical Association of Malawi
https://www.readbyqxmd.com/read/27882345/institutional-implementation-of-clinical-tumor-profiling-on-an-unselected-cancer-population
#19
Lynette M Sholl, Khanh Do, Priyanka Shivdasani, Ethan Cerami, Adrian M Dubuc, Frank C Kuo, Elizabeth P Garcia, Yonghui Jia, Phani Davineni, Ryan P Abo, Trevor J Pugh, Paul van Hummelen, Aaron R Thorner, Matthew Ducar, Alice H Berger, Mizuki Nishino, Katherine A Janeway, Alanna Church, Marian Harris, Lauren L Ritterhouse, Joshua D Campbell, Vanesa Rojas-Rudilla, Azra H Ligon, Shakti Ramkissoon, James M Cleary, Ursula Matulonis, Geoffrey R Oxnard, Richard Chao, Vanessa Tassell, James Christensen, William C Hahn, Philip W Kantoff, David J Kwiatkowski, Bruce E Johnson, Matthew Meyerson, Levi A Garraway, Geoffrey I Shapiro, Barrett J Rollins, Neal I Lindeman, Laura E MacConaill
BACKGROUND. Comprehensive genomic profiling of a patient's cancer can be used to diagnose, monitor, and recommend treatment. Clinical implementation of tumor profiling in an enterprise-wide, unselected cancer patient population has yet to be reported. METHODS. We deployed a hybrid-capture and massively parallel sequencing assay (OncoPanel) for all adult and pediatric patients at our combined cancer centers. Results were categorized by pathologists based on actionability. We report the results for the first 3,727 patients tested...
November 17, 2016: JCI Insight
https://www.readbyqxmd.com/read/27869053/incidence-risk-factors-and-outcomes-of-acute-kidney-injury-in-adults-undergoing-surgery-for-congenital-heart-disease
#20
David M Kwiatkowski, Elizabeth Price, David M Axelrod, Anitra W Romfh, Brian S Han, Scott M Sutherland, Catherine D Krawczeski
BACKGROUND: Acute kidney injury after cardiac surgery is a frequent and serious complication among children with congenital heart disease (CHD) and adults with acquired heart disease; however, the significance of kidney injury in adults after congenital heart surgery is unknown. The primary objective of this study was to determine the incidence of acute kidney injury after surgery for adult CHD. Secondary objectives included determination of risk factors and associations with clinical outcomes...
November 21, 2016: Cardiology in the Young
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