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https://www.readbyqxmd.com/read/28734349/integrated-preservation-and-sample-clean-up-procedures-for-studying-water-ingestion-by-recreational-swimmers-via-urinary-biomarker-determination
#1
Ricardo Cantú, Jody A Shoemaker, Catherine A Kelty, Larry J Wymer, Thomas D Behymer, Alfred P Dufour, Matthew L Magnuson
The use of cyanuric acid as a biomarker for ingestion of swimming pool water may lead to quantitative knowledge of the volume of water ingested during swimming, contributing to a better understanding of disease resulting from ingestion of environmental contaminants. When swimming pool water containing chlorinated cyanurates is inadvertently ingested, cyanuric acid is excreted quantitatively within 24 h as a urinary biomarker of ingestion. Because the volume of water ingested can be quantitatively estimated by calculation from the concentration of cyanuric acid in 24 h urine samples, a procedure for preservation, cleanup, and analysis of cyanuric acid was developed to meet the logistical demands of large scale studies...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28724744/ten-years-transmission-of-the-new-variant-of-chlamydia-trachomatis-in-sweden-prevalence-of-infections-and-associated-complications
#2
Jenny Dahlberg, Ronza Hadad, Karin Elfving, Inger Larsson, Jenny Isaksson, Anders Magnuson, Hans Fredlund, Magnus Unemo, Bjőrn Herrmann
OBJECTIVES: In 2006, a new variant of Chlamydia trachomatis (nvCT) was discovered in Sweden. It has a deletion in the plasmid resulting in failed detection by the single target systems from Abbott and Roche used at that time, whereas the third system used, from Becton Dickinson (BD), detects nvCT. The proportion of nvCT was initially up to 65% in counties using Abbott/Roche systems. This study analysed the proportion of nvCT from 2007 to 2015 in four selected counties and its impact on chlamydia-associated complications...
July 19, 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/28710067/a-comparison-of-passive-hind-limb-cycling-and-active-upper-limb-exercise-provides-new-insights-into-systolic-dysfunction-following-spinal-cord-injury
#3
Kathryn M DeVeau, Kathryn A Harman, Jordan W Squair, Andrei V Krassioukov, David Magnuson, Christopher R West
BACKGROUND: Active upper-limb and passive lower-limb exercise are two interventions used in the spinal cord injury (SCI) population. While the global cardiac responses have been previously studied, it is unclear how either exercise influences contractile cardiac function. Here, the cardiac contractile and volumetric responses to upper-limb (swim) and passive lower-limb exercise are investigated in rodents with a severe high-thoracic SCI. METHODS: Animals were divided into a control (CON), SCI no exercise (NO-EX), SCI passive hind-limb cycling (PHLC) or SCI swim (SWIM) group...
July 14, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28705881/defining-a-novel-role-for-the-pdx1-transcription-factor-in-islet-%C3%AE-cell-maturation-and-proliferation-during-weaning
#4
Jason M Spaeth, Manisha Gupte, Mark Perelis, Yu-Ping Yang, Holly Cyphert, Shuangli Guo, Jin-Hua Liu, Min Guo, Joseph Bass, Mark A Magnuson, Christopher Wright, Roland Stein
The transcription factor encoded by the Pancreas Duodenum Homeobox-1 (Pdx1) gene is a critical transcriptional regulator, as it has fundamental actions in the formation of all pancreatic cell types, islet β cell development, and adult islet β cell function. Transgenic- and cell line-based experiments have identified 5'-flanking conserved sequences that control pancreatic and β cell-type-specific transcription, which are found within Area I (base pairs (bp) -2694 to -2561), II (bp -2139 to -1958), III (bp -1879 to -1799), and IV (bp -6200 to -5670)...
July 13, 2017: Diabetes
https://www.readbyqxmd.com/read/28704608/the-electron-bifurcating-fixabcx-protein-complex-from-azotobacter-vinelandii-generation-of-low-potential-reducing-equivalents-for-nitrogenase-catalysis
#5
Rhesa Ledbetter, Amaya M Garcia-Costas, Carolyn E Lubner, David W Mulder, Monika Tokmina-Lukaszewska, Jacob H Artz, Angela Patterson, Timothy Magnuson, Zackary J Jay, H Diessel Duan, Jacquelyn Miller, Mary H Plunkett, John P Hoben, Brett M Barney, Ross P Carlson, Anne-Frances Miller, Brian Bothner, Paul W King, John W Peters, Lance C Seefeldt
The biological reduction of dinitrogen (N2) to ammonia (NH3) by nitrogenase is an energetically demanding reaction that requires low-potential electrons and ATP; however, pathways used to deliver the electrons from central metabolism to the reductants of nitrogenase, ferredoxin or flavodoxin, remain unknown for many diazotrophic microbes. The FixABCX protein complex has been proposed to reduce flavodoxin or ferredoxin using NADH as the electron donor in a process known as electron bifurcation. Herein, the FixABCX complex from Azotobacter vinelandii was purified and demonstrated to catalyze an electron bifurcation reaction: oxidation of NADH (Em= -320 mV) coupled to reduction of flavodoxin semiquinone (Em= -460 mV) and reduction of coenzyme Q (Em= +10 mV)...
July 13, 2017: Biochemistry
https://www.readbyqxmd.com/read/28695460/inversion-technique-for-the-removal-of-partially-covered-self-expandable-metallic-stents
#6
Christine Hill, Bassem K Khalil, Sindhu Barola, Abhishek Agnihotri, Robert A Moran, Yen-I Chen, Saowanee Ngamruengphong, Vikesh K Singh, Leigh A Frame, Michael A Schweitzer, Thomas H Magnuson, Mouen A Khashab, Patrick I Okolo, Vivek Kumbhari
BACKGROUND AND AIMS: Partially covered self-expandable metallic stents (PCSEMS), although an effective treatment for anastomotic/staple line leaks and strictures, can be difficult to remove. This study examines the effectiveness of the inversion technique for the removal of PCSEMS in the treatment of leaks and strictures that occurred post-sleeve gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB). METHODS: Consecutive patients who underwent PCSEMS removal for a leak and/or stricture post-SG or RYGB between July 2013 and December 2016 at the Johns Hopkins Medical Institutions were reviewed...
July 10, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28695457/the-role-of-laboratory-testing-in-differentiating-type-1-diabetes-from-type-2-diabetes-in-patients-undergoing-bariatric-surgery
#7
Scott J Pilla, Nisa M Maruthur, Michael A Schweitzer, Thomas H Magnuson, James J Potter, Jeanne M Clark, Clare J Lee
BACKGROUND: It may be difficult to distinguish between adults with type 1 diabetes and type 2 diabetes by clinical assessment. In patients undergoing bariatric surgery, it is critical to correctly classify diabetes subtype to prevent adverse perioperative outcomes including diabetic ketoacidosis. This study aimed to determine whether testing for C-peptide and islet cell antibodies during preoperative evaluation for bariatric surgery could improve the classification of type 1 versus type 2 diabetes compared to clinical assessment alone...
July 10, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28659243/the-impact-of-using-an-intraoperative-goal-directed-fluid-therapy-protocol-on-clinical-outcomes-in-patients-undergoing-total-pancreatectomy-and-islet-cell-autotransplantation
#8
Matthew K Wagar, Josh Magnuson, Patty T Liu, Varvara Kirchner, Joshua J Wilhelm, Martin L Freeman, Melena D Bellin, Timothy L Pruett, Gregory J Beilman, Ty B Dunn
BACKGROUND: Patients undergoing total pancreatectomy and islet cell autotransplant (TPIAT) for treatment of pancreatitis are at risk for complications of over and under resuscitation. We hypothesized that using a goal directed fluid therapy (GDFT) protocol might impact clinical outcomes. MATERIALS AND METHODS: A consecutive series of adult patients undergoing TPIAT were managed intraoperatively using either standard fluid therapy (SFT, n = 44) or GDFT (n = 23) as part of a pilot study between January 2013 and May 2015...
June 23, 2017: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/28658491/health-status-benefits-of-transcatheter-vs-surgical-aortic-valve-replacement-in-patients-with-severe-aortic-stenosis-at-intermediate-surgical-risk-results-from-the-partner-2-randomized-clinical-trial
#9
Suzanne J Baron, Suzanne V Arnold, Kaijun Wang, Elizabeth A Magnuson, Khaja Chinnakondepali, Raj Makkar, Howard C Herrmann, Susheel Kodali, Vinod H Thourani, Samir Kapadia, Lars Svensson, David L Brown, Michael J Mack, Craig R Smith, Martin B Leon, David J Cohen
Importance: In patients with severe aortic stenosis (AS) at intermediate surgical risk, treatment with transcatheter aortic valve replacement (TAVR) or surgical aortic valve replacement (SAVR) results in similar 2-year survival. The effect of TAVR vs SAVR on health status in patients at intermediate surgical risk is unknown. Objective: To compare health-related quality of life among intermediate-risk patients with severe AS treated with either TAVR or SAVR. Design, Setting, and Participants: Between December 2011 and November 2013, 2032 intermediate-risk patients with severe AS were randomized to TAVR with the Sapien XT valve or SAVR in the Placement of Aortic Transcatheter Valve 2 Trial and were followed up for 2 years...
June 28, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28648320/cost-effectiveness-of-edoxaban-vs-warfarin-in-patients-with-atrial-fibrillation-based-on-results-of-the-engage-af-timi-48-trial-taiwanese-perspective
#10
Katherine A Vilain, Ming Chin Yang, Elise Chia Hui Tan, Kaijun Wang, Haiyan Li, Wan Hsuan Hsu, Robert P Giugliano, David J Cohen, Elizabeth A Magnuson
BACKGROUND: Novel anticoagulants, such as factor Xa inhibitors, have entered clinical practice as alternatives to warfarin for the prevention of stroke and systemic embolic event (SEE) in patients with atrial fibrillation (AF). It is not known whether edoxaban, the fourth-to-market factor Xa inhibitor approved for this indication, will be cost-effective in Taiwan, where the cost of warfarin monitoring is prohibitive. METHODS: A Markov model projecting lifetime results of edoxaban 60 mg/30 mg dose-reduced versus warfarin in patients with nonvalvular AF, based on the ENGAGE AF - TIMI 48 trial, found edoxaban to be of high value relative to warfarin, from the perspective of the US health care system...
May 2017: Value in Health Regional Issues
https://www.readbyqxmd.com/read/28633805/somatic-support-following-cardiac-arrest-for-90%C3%A2-days-leading-to-a-healthy-baby-boy-a-case-report
#11
Sarah Holliday, Barbara Magnuson-Woodward
Due to a lack of published case reports regarding the somatic support of brain dead pregnant patients, each one adds to the limited knowledge that directs care for this patient population. A young woman experienced a cardiac arrest and was subsequently determined to be approximately 20 weeks pregnant following cardio pulmonary resuscitation. Soon after, she was diagnosed as brain dead, but her family chose to keep her supported in hopes of the delivery of a healthy child. She was transferred to our facility, where she was supported after being diagnosed as brain dead for a total of 90 days and delivered a healthy baby boy at almost 32 weeks gestational age...
June 17, 2017: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/28631219/agrobacterium-tumefaciens-mediated-transformation-of-oleaginous-yeast-lipomyces-species
#12
Ziyu Dai, Shuang Deng, David E Culley, Kenneth S Bruno, Jon K Magnuson
Interest in using renewable sources of carbon, especially lignocellulosic biomass, for the production of hydrocarbon fuels and chemicals has fueled interest in exploring various organisms capable of producing hydrocarbon biofuels and chemicals or their precursors. The oleaginous (oil-producing) yeast Lipomyces starkeyi is the subject of active research regarding the production of triacylglycerides as hydrocarbon fuel precursors using a variety of carbohydrate and nutrient sources. The genome of L. starkeyi has been published, which opens the door to production strain improvements through the development and use of the tools of synthetic biology for this oleaginous species...
June 19, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28621456/absorption-distribution-and-excretion-of-four-forms-of-titanium-dioxide-pigment-in-the-rat
#13
Thomas P Farrell, Berna Magnuson
Titanium dioxide (TiO2 ) is a white color additive that has a long history of global approval and use in food. There is, however, considerable confusion regarding the applicability of the biological effects of novel, engineered, nano-sized forms of TiO2 developed for nonpigmentary applications to the safety of oral exposure to food grade TiO2 pigment. The objective of this study was to assess the absorption, distribution, and routes of excretion in rats after oral exposure to food grade TiO2 . Four different grades of TiO2 (200 ppm) or control (0 ppm) diets were fed to rats for 7 consecutive days, followed by control diet only for 1, 24, or 72 h...
June 16, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28606761/inhibition-of-bromodomain-containing-protein-9-for-the-prevention-of-epigenetically-defined-drug-resistance
#14
Terry D Crawford, Steffan Vartanian, Alexandre Côté, Steve Bellon, Martin Duplessis, E Megan Flynn, Michael Hewitt, Hon-Ren Huang, James R Kiefer, Jeremy Murray, Christopher G Nasveschuk, Eneida Pardo, F Anthony Romero, Peter Sandy, Yong Tang, Alexander M Taylor, Vickie Tsui, Jian Wang, Shumei Wang, Laura Zawadzke, Brian K Albrecht, Steven R Magnuson, Andrea G Cochran, David Stokoe
Bromodomain-containing protein 9 (BRD9), an epigenetic "reader" of acetylated lysines on post-translationally modified histone proteins, is upregulated in multiple cancer cell lines. To assess the functional role of BRD9 in cancer cell lines, we identified a small-molecule inhibitor of the BRD9 bromodomain. Starting from a pyrrolopyridone lead, we used structure-based drug design to identify a potent and highly selective in vitro tool compound 11, (GNE-375). While this compound showed minimal effects in cell viability or gene expression assays, it showed remarkable potency in preventing the emergence of a drug tolerant population in EGFR mutant PC9 cells treated with EGFR inhibitors...
August 1, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28599602/spinal-cord-injury-causes-systolic-dysfunction-and-cardiomyocyte-atrophy
#15
Jordan W Squair, Kathryn M DeVeau, Kathryn A Harman, Malihe-Sadat Poormasjedi-Meibod, Brian Hayes, Jie Liu, David S K Magnuson, Andrei V Krassioukov, Christopher R West
Individuals with spinal cord injury (SCI) have been shown to exhibit systolic, and to a lesser extent, diastolic cardiac dysfunction. However, previous reports of cardiac dysfunction in this population are confounded by the changing loading conditions after SCI and as such, whether cardiac dysfunction per se is present is still unknown. Therefore, our aim was to establish if load-independent cardiac dysfunction is present after SCI, to understand the functional cardiac response to SCI, and to explore the changes within the cellular milieu of the myocardium...
June 9, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28598347/ingestion-of-swimming-pool-water-by-recreational-swimmers
#16
A P Dufour, T D Behymer, R Cantú, M Magnuson, L J Wymer
The volume of water ingested by swimmers while swimming is of great interest to individuals who develop risk assessments using quantitative microbial risk assessment or epidemiological approaches. We have used chloroisocyanurate disinfected swimming pool waters to determine the amount of water swallowed by swimmers during swimming activity. The chloroisocyanurate, which is in equilibrium with chlorine and cyanuric acid in the pool water, provides a biomarker, cyanuric acid, that once swallowed passes through the body into the urine unchanged...
June 2017: Journal of Water and Health
https://www.readbyqxmd.com/read/28586445/relative-conspicuity-of-gadolinium-based-contrast-agents-in-interventional-pain-procedures
#17
Timothy P Maus, Beth A Schueler, Dixon J Magnuson, Dayne Magnuson
Objective: To assess the relative radiographic conspicuity of gadolinium-based contrast agents (GBCAs) that may be used in spinal injection procedures when iodine-based contrast agents are contraindicated. Methods: Eight GBCAs and three iodinated agents of varying iodine concentrations were radiographed under conditions representative of lumbar spinal injections at four kilovoltage peak (kVp) values. Radiographic contrast of each agent was measured as the percent pixel value difference with respect to background...
April 1, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28579393/long-noncoding-rna-moderates-microrna-activity-to-maintain-self-renewal-in-embryonic-stem-cells
#18
Keriayn N Smith, Joshua Starmer, Sarah C Miller, Praveen Sethupathy, Terry Magnuson
Of the thousands of long noncoding RNAs expressed in embryonic stem cells (ESCs), few have known roles and fewer have been functionally implicated in the regulation of self-renewal and pluripotency, or the reprogramming of somatic cells to the pluripotent state. In ESCs, Cyrano is a stably expressed long intergenic noncoding RNA with no previously assigned role. We demonstrate that Cyrano contributes to ESC maintenance, as its depletion results in the loss of hallmarks of self-renewal. Delineation of Cyrano's network through transcriptomics revealed widespread effects on signaling pathways and gene expression networks that contribute to ESC maintenance...
July 11, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28574172/prevention-of-hip-displacement-in-children-with-cerebral-palsy-a-systematic-review
#19
REVIEW
Stacey D Miller, Maria Juricic, Kim Hesketh, Lynore Mclean, Sonja Magnuson, Sherylin Gasior, Emily Schaeffer, Maureen O'donnell, Kishore Mulpuri
AIM: To conduct a systematic review and evaluate the quality of evidence for interventions to prevent hip displacement in children with cerebral palsy (CP). METHOD: A systematic review was performed using American Academy of Cerebral Palsy and Developmental Medicine (AACPDM) and Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology. Searches were completed in seven electronic databases. Studies were included if participants had CP and the effectiveness of the intervention was reported using a radiological measure...
June 2, 2017: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/28561034/a-damaged-genome-s-transcriptional-landscape-through-multilayered-expression-profiling-around-in-situ-mapped-dna-double-strand-breaks
#20
Fabio Iannelli, Alessandro Galbiati, Ilaria Capozzo, Quan Nguyen, Brian Magnuson, Flavia Michelini, Giuseppina D'Alessandro, Matteo Cabrini, Marco Roncador, Sofia Francia, Nicola Crosetto, Mats Ljungman, Piero Carninci, Fabrizio d'Adda di Fagagna
Of the many types of DNA damage, DNA double-strand breaks (DSBs) are probably the most deleterious. Mounting evidence points to an intricate relationship between DSBs and transcription. A cell system in which the impact on transcription can be investigated at precisely mapped genomic DSBs is essential to study this relationship. Here in a human cell line, we map genome-wide and at high resolution the DSBs induced by a restriction enzyme, and we characterize their impact on gene expression by four independent approaches by monitoring steady-state RNA levels, rates of RNA synthesis, transcription initiation and RNA polymerase II elongation...
May 31, 2017: Nature Communications
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