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https://www.readbyqxmd.com/read/28511934/repeated-manganese-administration-produced-abnormal-expression-of-circadian-clock-genes-in-the-hypothalamus-and-liver-of-rats
#1
Huan Li, Ximin Fan, Ying Luo, Sheng Song, Jie Liu, Qiyuan Fan
Manganese (Mn) neurotoxicity displays non-motor dysfunction and motor impairment like Parkinson's disease (PD), and is called as Manganism. Circadian disruption is a non-motor symptom found in PD and Manganism. Clock genes are essential to drive and maintain circadian rhythm, but little is known about Mn exposure on circadian clock genes expression. Both the brain and liver are targets of Mn, we hypothesize that repeated Mn administration could affect clock gene expression in the hypothalamus and livers. Male Sprague-Dawley rats were intraperitoneally injected Mn(2+)1mg and 5mg /kg as MnCl2•4H2O, every other day for 30 days...
May 13, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28500793/integrating-the-genomic-architecture-of-human-nucleolar-organizer-regions-with-the-biophysical-properties-of-nucleoli
#2
REVIEW
Hazel Mangan, Michael Ó Gailín, Brian McStay
Nucleoli are the sites of ribosome biogenesis and the largest membraneless sub-nuclear structures. They are intimately linked with growth and proliferation control and function as sensors of cellular stress. Nucleoli form around arrays of ribosomal gene (rDNA) repeats also called nucleolar organizer regions (NORs). In humans, NORs are located on the short arms of all five human acrocentric chromosomes. Multiple NORs contribute to the formation of large heterochromatin-surrounded nucleoli observed in most human cells...
May 13, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28484760/comparison-of-nucleophilic-and-radical-based-routes-to-the-formation-of-manganese-main-group-element-single-bonds
#3
Douglas W Agnew, Curtis E Moore, Arnold L Rheingold, Joshua S Figueroa
Using the stable metalloradical Mn(CO)3(CNAr(Dipp2))2, we report the formation of manganese-main group complexes via the single-electron functionalization of main group halides. The reactions occur in a simple 1 : 1 stoichiometry, and demonstrate the utility of using stable open-shelled organometallics as precursors for metal-main group compounds. This has enabled the preparation of manganese complexes bearing terminal -EXn substituents, as shown through the isolation of Mn(SnCl)(CO)3(CNAr(Dipp2))2 and Mn(BiCl2)(CO)3(CNAr(Dipp2))2 from SnCl2 and BiCl3, respectively...
May 9, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28479240/fesoterodine-for-the-treatment-of-nocturnal-urgency-in-patients-with-overactive-bladder-syndrome-an-analysis-of-responders-and-non-responders
#4
Johnathan A Khusid, Jeffrey P Weiss, Martin O Carlsson, Erin K Mangan
PURPOSE: A recent study demonstrated improvement of nocturnal urgency in patients with overactive bladder (OAB) when treated with fesoterodine. The current study aims to determine which bladder diary parameters predict response to fesoterodine in these patients. MATERIALS AND METHODS: Patients with nocturnal urgency completed a 2-week, single-blind, placebo run-in, followed by 1:1 double-blind randomization to 12 weeks of fesoterodine or placebo. We analysed changes from baseline to week 12 of bladder diary parameters including actual number night voids (ANV, total # nocturia episodes), maximum voided volume (MVV), nocturnal bladder capacity (NBC), nocturnal bladder capacity index (NBCi = ANV- NUV/MVV-1), nocturnal urine volume (NUV), nocturia index (Ni = NUV/MVV), nocturnal polyuria index and (NPi = NUV/24 hour volume)...
May 4, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28475631/a-systems-level-model-reveals-that-1-2-propanediol-utilization-microcompartments-enhance-pathway-flux-through-intermediate-sequestration
#5
Christopher M Jakobson, Danielle Tullman-Ercek, Marilyn F Slininger, Niall M Mangan
The spatial organization of metabolism is common to all domains of life. Enteric and other bacteria use subcellular organelles known as bacterial microcompartments to spatially organize the metabolism of pathogenicity-relevant carbon sources, such as 1,2-propanediol. The organelles are thought to sequester a private cofactor pool, minimize the effects of toxic intermediates, and enhance flux through the encapsulated metabolic pathways. We develop a mathematical model of the function of the 1,2-propanediol utilization microcompartment of Salmonella enterica and use it to analyze the function of the microcompartment organelles in detail...
May 5, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28460583/subchronic-low-level-intraperitoneal-injections-of-manganese-iv-oxide-and-manganese-ii-chloride-affect-rat-brain-neurochemistry
#6
Brian S Nielsen, Erik H Larsen, Ole Ladefoged, Henrik R Lam
Manganese (Mn) is neurotoxic and can induce manganism, a Parkinson-like disease categorized as being a serious central nervous system irreversible neurodegenerative disease. An increased risk of developing symptoms of Parkinson disease has been linked to work-related exposure, for example, for workers in agriculture, horticulture, and people living near areas with frequent use of Mn-containing pesticides. In this study, the focus was placed on neurochemical effects of Mn. Rats were dosed intraperitoneally with 0...
January 1, 2017: International Journal of Toxicology
https://www.readbyqxmd.com/read/28449375/the-genetic-dimension-of-pest-pressure-in-the-tropical-rainforest
#7
Marco Todesco, Quentin Cronk
Wet tropical forests are among the most diverse ecosystems on Earth and can host several hundreds of tree species per hectare. To maintain such diversity, the community must contain large numbers of relatively rare species rather than be dominated by a few very common trees, as is often the case in temperate forests. Explaining the mechanisms preventing dominance by common species has been a major task of tropical forest ecology. One of the most promising mechanisms is negative density dependence (NDD) of tree abundance driven by pests, including fungal diseases ('pest pressure')...
May 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28416395/the-early-history-of-manganese-and-the-recognition-of-its-neurotoxicity-1837-1936
#8
Paul D Blanc
The history of the biomedical recognition manganese-caused neurotoxicity mirrors changing technologies as much as it does the ontology of parkinsonism. The initial 1837 report of manganese-induced neurologic injury was made by John Couper, a university-based physician in Scotland. He made clear that the outbreak occurred among workers at the Charles Tennant bleach manufactory in the environs of Glasgow. The relatively new technology of chlorine generation using manganese accounted for the novel exposure involved...
April 14, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28399974/evaluation-of-the-tuberculosis-infection-control-training-center-tajikistan-2014-2015
#9
C Scott, J Mangan, Z Tillova, P A Jensen, S Ahmedov, J Ismoilova, A Trusov
SETTING: Training center on tuberculosis (TB) infection control (IC) for health care workers in the Central Asian Republics region. OBJECTIVE: To assess the effects of TB IC training courses conducted at the Tuberculosis Infection Control Training Center in Machiton, Tajikistan. DESIGN: Participants who participated in training (n = 89) during the first year of operation (April 2014-February 2015) were invited to participate in a post-training interview...
May 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28394286/sodium-p-aminosalicylic-acid-reverses-sub-chronic-manganese-induced-impairments-of-spatial-learning-and-memory-abilities-in-rats-but-fails-to-restore-%C3%AE-aminobutyric-acid-levels
#10
Shao-Jun Li, Chao-Yan Ou, Sheng-Nan He, Xiao-Wei Huang, Hai-Lan Luo, Hao-Yang Meng, Guo-Dong Lu, Yue-Ming Jiang, Tanara Vieira Peres, Yi-Ni Luo, Xiang-Fa Deng
Excessive manganese (Mn) exposure is not only a health risk for occupational workers, but also for the general population. Sodium para-aminosalicylic acid (PAS-Na) has been successfully used in the treatment of manganism, but the involved molecular mechanisms have yet to be determined. The present study aimed to investigate the effects of PAS-Na on sub-chronic Mn exposure-induced impairments of spatial learning and memory, and determine the possible involvements of γ-aminobutyric acid (GABA) metabolism in vivo...
April 10, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28384512/novel-substrates-for-the-automated-and-manual-assay-of-endo-1-4-%C3%AE-xylanase
#11
David Mangan, Claudio Cornaggia, Agnija Liadova, Niall McCormack, Ruth Ivory, Vincent A McKie, Aaron Ormerod, Barry V McCleary
endo-1,4-β-Xylanase (EC 3.2.1.8) is employed across a broad range of industries including animal feed, brewing, baking, biofuels, detergents and pulp (paper). Despite its importance, a rapid, reliable, reproducible, automatable assay for this enzyme that is based on the use of a chemically defined substrate has not been described to date. Reported herein is a new enzyme coupled assay procedure, termed the XylX6 assay, that employs a novel substrate, namely 4,6-O-(3-ketobutylidene)-4-nitrophenyl-β-4(5)-O-glucosyl-xylopentaoside...
March 4, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28378122/interplay-between-lysosomal-mitochondrial-and-death-receptor-pathways-during-manganese-induced-apoptosis-in-glial-cells
#12
R M Gorojod, A Alaimo, S Porte Alcon, F Saravia, M L Kotler
Manganese (Mn) is an essential trace metal which plays a critical role in brain physiology by acting as a cofactor for several enzymes. However, upon overexposure, Mn preferentially accumulates within the basal ganglia leading to the development of a Parkinsonism known as Manganism. Data from our group have proved that Mn induces oxidative stress-mediated apoptosis in astrocytoma C6 cells. In the present study we described how cathepsins impact on different steps of each apoptotic cascade. Evidence obtained demonstrated that Mn generates lysosomal membrane permeabilization (LMP) and cathepsin release...
April 4, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28368414/tgf%C3%AE-engages-mek-erk-to-differentially-regulate-benign-and-malignant-pancreas-cell-function
#13
D R Principe, A M Diaz, C Torres, R J Mangan, B DeCant, R McKinney, M-S Tsao, A Lowy, H G Munshi, B Jung, P J Grippo
While TGFβ signals are anti-proliferative in benign and well-differentiated pancreatic cells, TGFβ appears to promote the progression of advanced cancers. To better understand dysregulation of the TGFβ pathway, we first generated mouse models of neoplastic disease with TGFβ receptor deficiencies. These models displayed reduced levels of pERK irrespective of KRAS mutation. Furthermore, exogenous TGFβ led to rapid and sustained TGFBR1-dependent ERK phosphorylation in benign pancreatic duct cells. Similar to results that our group has published in colon cancer cells, inhibition of ERK phosphorylation in duct cells mitigated TGFβ-induced upregulation of growth suppressive pSMAD2 and p21, prevented downregulation of the pro-growth signal CDK2 and ablated TGFβ-induced EMT...
April 3, 2017: Oncogene
https://www.readbyqxmd.com/read/28326189/sarilumab-improves-patient-reported-outcomes-in-rheumatoid-arthritis-patients-with-inadequate-response-intolerance-to-tumour-necrosis-factor-inhibitors
#14
Vibeke Strand, Matthew Reaney, Chieh-I Chen, Clare W J Proudfoot, Sophie Guillonneau, Deborah Bauer, Erin Mangan, Neil M H Graham, Hubert van Hoogstraten, Yong Lin, César Pacheco-Tena, Roy Fleischmann
OBJECTIVE: To evaluate effects of the anti-interleukin-6 receptor monoclonal antibody sarilumab administered with conventional synthetic disease-modifying antirheumatic drugs (csDMARDs) on patient-reported outcomes (PROs) in the TARGET trial in patients with rheumatoid arthritis (RA) with inadequate response or intolerance to tumour necrosis factor inhibitors (TNF-IR). METHODS: 546 patients (81.9% female, mean age 52.9 years) were randomised to placebo, sarilumab 150 or 200 mg subcutaneously every 2 weeks + csDMARDs...
2017: RMD Open
https://www.readbyqxmd.com/read/28320285/cells-resistant-to-toxic-concentrations-of-manganese-have-increased-ability-to-repair-dna
#15
K A Zakharcheva, L V Gening, K Yu Kazachenko, V Z Tarantul
Manganese (Mn) is crucially important for vital activity of cells and has many biological functions. Nevertheless, high doses of Mn taken up by an organism over a long period may cause neurodegenerative diseases such as manganism and Parkinsonism. The molecular mechanisms of this Mn toxicity are still poorly studied. It is now believed that Mn-induced pathophysiological neural processes are multifaceted and affect several metabolic pathways. In particular, Mn ions might affect the processes of DNA replication and repair...
January 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28306727/biodistribution-and-pet-imaging-of-pharmacokinetics-of-manganese-in-mice-using-manganese-52
#16
A Lake Wooten, Tolulope A Aweda, Benjamin C Lewis, Rebecca B Gross, Suzanne E Lapi
Manganese is essential to life, and humans typically absorb sufficient quantities of this element from a normal healthy diet; however, chronic, elevated ingestion or inhalation of manganese can be neurotoxic, potentially leading to manganism. Although imaging of large amounts of accumulated Mn(II) is possible by MRI, quantitative measurement of the biodistribution of manganese, particularly at the trace level, can be challenging. In this study, we produced the positron-emitting radionuclide 52Mn (t1/2 = 5.6 d) by proton bombardment (Ep<15 MeV) of chromium metal, followed by solid-phase isolation by cation-exchange chromatography...
2017: PloS One
https://www.readbyqxmd.com/read/28302480/comprehensive-investigation-of-aberrant-micrornas-expression-in-cells-culture-model-of-mncl2-induced-neurodegenerative-disease
#17
Rong He, Xiaoyun Xie, Linyue Lv, Yongqi Huang, Xianmin Xia, Xiaowu Chen, Lei Zhang
Manganese (Mn) is required in various human physiological processes. Excessive Mn exposure causes manganism, a progressive neurodegenerative disorder similar to idiopathic Parkinson's disease (IPD). However, the detailed mechanism of Mn-induced neurotoxicity is not yet fully understood. MicroRNAs (miRNAs) play important roles in gene expression regulation, and miRNA expression profile provides additional biological and prognostic information of diseases. In our study, RNA sequencing was performed to profile miRNAs in the SH-SY5Y cells following MnCl2 treatment...
April 29, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28259768/-18-f-fp-cit-dopamine-transporter-pet-findings-in-cirrhotic-patients-with-parkinsonism
#18
Hui-Jun Yang, Seol Hoon Park, Minjung Seo, Young Cheol Weon, Yangho Kim
We report the clinical features and imaging findings of presynaptic dopamine transporter (DAT) positron emission tomography (PET) in four of patients with liver cirrhosis and concurrent parkinsonism. We also reviewed previously reported cases of cirrhosis-related parkinsonism using dopaminergic molecular imaging. Our results using (18)F-radiolabeled N-(3-fluoropropyl)-2β-carboxymethoxy-3β-(4-iodophenyl) nortropane (FP-CIT) DAT PET in four patients with cirrhosis and parkinsonism showed two different molecular imaging patterns well related to their neurological symptoms...
March 1, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28241211/families-as-partners-in-hospital-error-and-adverse-event-surveillance
#19
Alisa Khan, Maitreya Coffey, Katherine P Litterer, Jennifer D Baird, Stephannie L Furtak, Briana M Garcia, Michele A Ashland, Sharon Calaman, Nicholas C Kuzma, Jennifer K O'Toole, Aarti Patel, Glenn Rosenbluth, Lauren A Destino, Jennifer L Everhart, Brian P Good, Jennifer H Hepps, Anuj K Dalal, Stuart R Lipsitz, Catherine S Yoon, Katherine R Zigmont, Rajendu Srivastava, Amy J Starmer, Theodore C Sectish, Nancy D Spector, Daniel C West, Christopher P Landrigan, Brenda K Allair, Claire Alminde, Wilma Alvarado-Little, Marisa Atsatt, Megan E Aylor, James F Bale, Dorene Balmer, Kevin T Barton, Carolyn Beck, Zia Bismilla, Rebecca L Blankenberg, Debra Chandler, Amanda Choudhary, Eileen Christensen, Sally Coghlan-McDonald, F Sessions Cole, Elizabeth Corless, Sharon Cray, Roxi Da Silva, Devesh Dahale, Benard Dreyer, Amanda S Growdon, LeAnn Gubler, Amy Guiot, Roben Harris, Helen Haskell, Irene Kocolas, Elizabeth Kruvand, Michele Marie Lane, Kathleen Langrish, Christy J W Ledford, Kheyandra Lewis, Joseph O Lopreiato, Christopher G Maloney, Amanda Mangan, Peggy Markle, Fernando Mendoza, Dale Ann Micalizzi, Vineeta Mittal, Maria Obermeyer, Katherine A O'Donnell, Mary Ottolini, Shilpa J Patel, Rita Pickler, Jayne Elizabeth Rogers, Lee M Sanders, Kimberly Sauder, Samir S Shah, Meesha Sharma, Arabella Simpkin, Anupama Subramony, E Douglas Thompson, Laura Trueman, Tanner Trujillo, Michael P Turmelle, Cindy Warnick, Chelsea Welch, Andrew J White, Matthew F Wien, Ariel S Winn, Stephanie Wintch, Michael Wolf, H Shonna Yin, Clifton E Yu
Importance: Medical errors and adverse events (AEs) are common among hospitalized children. While clinician reports are the foundation of operational hospital safety surveillance and a key component of multifaceted research surveillance, patient and family reports are not routinely gathered. We hypothesized that a novel family-reporting mechanism would improve incident detection. Objective: To compare error and AE rates (1) gathered systematically with vs without family reporting, (2) reported by families vs clinicians, and (3) reported by families vs hospital incident reports...
April 1, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28213246/spinel-type-manganese-ferrite-mnfe2o4-microspheres-a-novel-affinity-probe-for-selective-and-fast-enrichment-of-phosphopeptides
#20
Xing-Yu Long, Jia-Yuan Li, Dong Sheng, Hong-Zhen Lian
The spinel-type magnetic manganese ferrite (MnFe2O4) microspheres synthesized by simple solvothermal method were used as a novel adsorbent for selective enrichment and effective isolation of phosphopeptides. The uniform MnFe2O4 magnetic affinity microspheres (MAMSs) had a narrow particle size distribution between 250 and 260nm, and displayed superparamagnetism with a saturation magnetization value of 67.0emu/g. Comprehensively, the possible formation mechanism of MnFe2O4 microspheres with ferric and manganous sources as dual precursors was elucidated by comparison with those of Fe3O4 nanoparticles and MnOOH nanosheets respectively with either ferric or manganous source as single precursor...
May 1, 2017: Talanta
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