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https://www.readbyqxmd.com/read/28213246/spinel-type-manganese-ferrite-mnfe2o4-microspheres-a-novel-affinity-probe-for-selective-and-fast-enrichment-of-phosphopeptides
#1
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
https://www.readbyqxmd.com/read/28212723/redox-dynamics-of-manganese-as-a-mitochondrial-life-death-switch
#2
REVIEW
Matthew Ryan Smith, Jolyn Fernandes, Young-Mi Go, Dean P Jones
Sten Orrenius, M.D., Ph.D., pioneered many areas of cellular and molecular toxicology and made seminal contributions to our knowledge of oxidative stress and glutathione (GSH) metabolism, organellar functions and Ca(+2)-dependent mechanisms of cell death, and mechanisms of apoptosis. On the occasion of his 80(th) birthday, we summarize current knowledge on redox biology of manganese (Mn) and its role in mechanisms of cell death. Mn is found in all organisms and has critical roles in cell survival and death mechanisms by regulating Mn-containing enzymes such as manganese superoxide dismutase (SOD2) or affecting expression and activity of caspases...
January 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28183032/manganese-neurotoxicity-and-protective-effects-of-resveratrol-and-quercetin-in-preclinical-research
#3
Maciej Gawlik, Małgorzata B Gawlik, Irena Smaga, Małgorzata Filip
BACKGROUND: Exposure to Mn results in a neurological syndrome known as manganism. METHODS: We examined how 4-week Mn exposure (20mg/kg MnCl2po, 5days/week) induces neurotoxic effects in rats. Oxidized-to-reduced glutathione ratio (GSSG/GSH), malondialdehyde (MDA), superoxide dismutase (SOD) activity, catalase (CAT) activity, vitamin E content and caspase-3 activity were measured in several rat brain structures. Further, we examined protective effects of the polyphenols: resveratrol (R) or quercetin (QCT) against Mn-induced neurotoxicity...
December 14, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28157461/multidrug-resistant-tuberculosis-patients-views-of-interventions-to-reduce-treatment-loss-to-follow-up
#4
T Tupasi, A M C G Garfin, J M Mangan, R Orillaza-Chi, L C Naval, G I Balane, R Basilio, A Golubkov, E S Joson, W-J Lew, V Lofranco, M Mantala, S Pancho, J N Sarol, A Blumberg, D Burt, E V Kurbatova
SETTING: Patients who initiated treatment for multidrug-resistant tuberculosis (MDR-TB) at 15 Programmatic Management of Drug-resistant Tuberculosis (PMDT) health facilities in the Philippines between July and December 2012. OBJECTIVES: To describe patients' views of current interventions, and suggest changes likely to reduce MDR-TB loss to follow-up. METHODS: In-depth interviews were conducted between April and July 2014 with MDR-TB patients who were undergoing treatment, had finished treatment at the time of the interview (controls), or had been lost to follow-up (LTFU)...
January 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28146110/polyphenolic-extract-of-euphorbia-supina-attenuates-manganese-induced-neurotoxicity-by-enhancing-antioxidant-activity-through-regulation-of-er-stress-and-er-stress-mediated-apoptosis
#5
Entaz Bahar, Geum-Hwa Lee, Kashi Raj Bhattarai, Hwa-Young Lee, Min-Kyung Choi, Harun-Or Rashid, Ji-Ye Kim, Han-Jung Chae, Hyonok Yoon
Manganese (Mn) is an important trace element present in human body, which acts as an enzyme co-factor or activator in various metabolic reactions. While essential in trace amounts, excess levels of Mn in human brain can produce neurotoxicity, including idiopathic Parkinson's disease (PD)-like extrapyramidal manganism symptoms. This study aimed to investigate the protective role of polyphenolic extract of Euphorbia supina (PPEES) on Mn-induced neurotoxicity and the underlying mechanism in human neuroblastoma SKNMC cells and Sprague-Dawley (SD) male rat brain...
January 30, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28133682/uhplc-q-tof-ms-based-plasma-metabolomics-reveals-the-metabolic-perturbations-by-manganese-exposure-in-rat-models
#6
Hui Wang, Zhiqi Liu, Shengyi Wang, Dongan Cui, Xinke Zhang, Yongming Liu, Yihua Zhang
Although manganese (Mn) is an essential metal ion biological cofactor, high concentrations could potentially induce an accumulation in the brain and lead to manganism. However, there is no "gold standard" for manganism assessment due to a lack of objective biomarkers. We hypothesized that Mn-induced alterations are associated with metabolic responses to manganism. Here we use an untargeted metabolomics approach by performing ultra-high performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF/MS) on control and Mn-treated rat plasma, to identify metabolic disruptions under high Mn exposure conditions...
January 30, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28122187/on-the-oxidation-state-of-manganese-ions-in-li-ion-battery-electrolyte-solutions
#7
Anjan Banerjee, Yuliya Shilina, Baruch Ziv, Joseph M Ziegelbauer, Shalom Luski, Doron Aurbach, Ion C Halalay
We demonstrate herein that Mn(3+) and not Mn(2+), as commonly accepted, is the dominant dissolved manganese cation in LiPF6-based electrolyte solutions of Li-ion batteries with lithium manganate spinel positive and graphite negative electrodes chemistry. The Mn(3+) fractions in solution, derived from a combined analysis of electron paramagnetic resonance and inductively coupled plasma spectroscopy data, are ∼80% for either fully discharged (3.0 V hold) or fully charged (4.2 V hold) cells, and ∼60% for galvanostatically cycled cells...
January 30, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28111152/how-ants-use-vision-when-homing-backward
#8
Sebastian Schwarz, Michael Mangan, Jochen Zeil, Barbara Webb, Antoine Wystrach
Ants can navigate over long distances between their nest and food sites using visual cues [1, 2]. Recent studies show that this capacity is undiminished when walking backward while dragging a heavy food item [3-5]. This challenges the idea that ants use egocentric visual memories of the scene for guidance [1, 2, 6]. Can ants use their visual memories of the terrestrial cues when going backward? Our results suggest that ants do not adjust their direction of travel based on the perceived scene while going backward...
February 6, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28074748/possible-parkinson-s-disease-induced-by-chronic-manganese-supplement-ingestion
#9
Michael J Schuh
OBJECTIVE: The objective is to report a case of possible neurotoxicity resulting from an incorrect dietary supplement for osteoporosis taken at a toxic dose. SUMMARY: The case study examined here is a 37-year-old African-American female who consumed excessive manganese over a period of years, resulting in Parkinson's disease (PD). This patient was referred to the pharmacist pharmacotherapy service by a neurology physician. PD has been shown in the medical literature to be caused by chronic exposure to high levels of manganese...
December 1, 2016: Consultant Pharmacist: the Journal of the American Society of Consultant Pharmacists
https://www.readbyqxmd.com/read/28073977/the-effects-of-a-modified-hot-water-treatment-on-anastrepha-ludens-diptera-tephritidae-infested-mango
#10
Emilio Hernández, Marysol Aceituno-Medina, Jorge Toledo, Bigail Bravo, José Caro-Corrales, Pablo Montoya, Robert Mangan
The Mexican fruit fly, Anastrepha ludens (Loew), is a quarantine pest in mango (Mangifera indica L.) that can be controlled by using a hot water treatment (HWT). This treatment is normally followed by a 30-min hydrocooling (HYC) process that reduces the negative effects that the treatment has on fruit quality. However, if hot water-treated fruits are immediately immersed in water at 21 °C, the survival rate of third-instar A. ludens may be increased. The current approved treatment protocol states that if HYC is used, then treated fruit should undergo an additional 10-min HWT or on platform for 30 min before HYC...
January 10, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28058667/evaluation-of-high-risk-features-of-primary-enucleation-of-patients-with-retinoblastoma-in-a-tertiary-center-of-a-developing-country-in-the-era-of-intra-arterial-chemotherapy
#11
Funda Dikkaya, Ahmet Murat Sarıcı, Firuze Erbek, Tiraje Celkan, Mehmet Serhat Mangan, Övgü Aydın, Cuyan Demirkesen, Halit Pazarlı
PURPOSE: To evaluate the frequency of high-risk histopathologic factors in Turkish children enucleated for retinoblastoma and to analyze the association between growth pattern, rosetta formation, tumor thickness, presence of necrosis, calcification, neovascularization, rate of mitosis, and high-risk histopathologic factors. METHODS: Pathology reports of 59 eyes who had received enucleation for retinoblastoma were reviewed retrospectively. The histopathologic data included presence of choroidal invasion, optic nerve invasion, scleral extension, tumor thickness, presence of necrosis, calcification, neovascularization, rosetta formation and lymphocyte infiltration, rate of mitosis, and growth pattern...
January 5, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28058159/isolated-anterior-lens-capsule-rupture-secondary-to-blunt-trauma-pathophysiology-and-treatment
#12
Mehmet Serhat Mangan, Ceyhun Arıcı, İbrahim Tuncer, Hüseyin Yetik
A 25-year-old man suffered an isolated lens anterior capsular tear and mature cataract formation following blunt injury to his right eye. One week after the trauma, best-corrected visual acuity (BCVA) in the right eye was hand motion. B-scan ultrasonography showed that the lens posterior capsule was intact; no vitreous foreign body or retinal pathology were observed. Orbital computed tomography revealed narrowed anterior chamber and increased lens material volume and lens reflectivity in the injured right eye...
August 2016: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28056077/heterogeneous-ice-nucleation-by-soufriere-hills-volcanic-ash-immersed-in-water-droplets
#13
T P Mangan, J D Atkinson, J W Neuberg, D O'Sullivan, T W Wilson, T F Whale, L Neve, N S Umo, T L Malkin, B J Murray
Fine particles of ash emitted during volcanic eruptions may sporadically influence cloud properties on a regional or global scale as well as influencing the dynamics of volcanic clouds and the subsequent dispersion of volcanic aerosol and gases. It has been shown that volcanic ash can trigger ice nucleation, but ash from relatively few volcanoes has been studied for its ice nucleating ability. In this study we quantify the efficiency with which ash from the Soufriere Hills volcano on Montserrat nucleates ice when immersed in supercooled water droplets...
2017: PloS One
https://www.readbyqxmd.com/read/28045025/interferon-epsilon-promotes-hiv-restriction-at-multiple-steps-of-viral-replication
#14
Albert Garcia-Minambres, Sahar G Eid, Niamh E Mangan, Corinna Pade, San S Lim, Antony Y Matthews, Nicole A de Weerd, Paul J Hertzog, Johnson Mak
Interferon epsilon (IFNɛ) is a type I IFN that is expressed constitutively in the female reproductive tract (FRT), and contributes to protection in models of sexually transmitted infections. Using multiple cell systems, including reporter cell lines and activated peripheral blood lymphocytes (PBLs), we show that recombinant IFNɛ impairs HIV infection at stage(s) post HIV entry and up to the translation of viral proteins. Consistent with this, IFNɛ upregulated a number of host cell restriction factors that block HIV at these stages of the replication cycle...
January 3, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28042895/ecological-genomics-of-tropical-trees-how-local-population-size-and-allelic-diversity-of-resistance-genes-relate-to-immune-responses-cosusceptibility-to-pathogens-and-negative-density-dependence
#15
J H Marden, S A Mangan, M P Peterson, E Wafula, H W Fescemyer, J P Der, C W dePamphilis, L S Comita
In tropical forests, rarer species show increased sensitivity to species-specific soil pathogens and more negative effects of conspecific density on seedling survival (NDD). These patterns suggest a connection between ecology and immunity, perhaps because small population size disproportionately reduces genetic diversity of hyperdiverse loci such as immunity genes. In an experiment examining seedling roots from six species in one tropical tree community, we found that smaller populations have reduced amino acid diversity in pathogen resistance (R) genes but not the transcriptome in general...
January 2, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28042878/arbuscular-mycorrhizal-fungal-community-composition-is-altered-by-long-term-litter-removal-but-not-litter-addition-in-a-lowland-tropical-forest
#16
Merlin Sheldrake, Nicholas P Rosenstock, Daniel Revillini, Pål Axel Olsson, Scott Mangan, Emma J Sayer, Håkan Wallander, Benjamin L Turner, Edmund V J Tanner
Tropical forest productivity is sustained by the cycling of nutrients through decomposing organic matter. Arbuscular mycorrhizal (AM) fungi play a key role in the nutrition of tropical trees, yet there has been little experimental investigation into the role of AM fungi in nutrient cycling via decomposing organic material in tropical forests. We evaluated the responses of AM fungi in a long-term leaf litter addition and removal experiment in a tropical forest in Panama. We described AM fungal communities using 454-pyrosequencing, quantified the proportion of root length colonised by AM fungi using microscopy, and estimated AM fungal biomass using a lipid biomarker...
January 2, 2017: New Phytologist
https://www.readbyqxmd.com/read/28024184/serpinb9-is-a-marker-of-antigen-cross-presenting-dendritic-cells
#17
M S Mangan, J Vega-Ramos, L T Joeckel, A J Mitchell, A Rizzitelli, B Roediger, D Kaiserman, W W Weninger, J A Villadangos, P I Bird
Serpinb9 (Sb9, also called Spi6) is an intracellular inhibitor of granzyme B (grB) that protects cytotoxic lymphocytes from grB-mediated death. In addition, Sb9 is also expressed in accessory immune cells, including dendritic cells (DCs), although its role is debated. Recently, we have demonstrated that Sb9 plays a grB-independent role in cross-presentation of antigens by CD8(+) DCs. Here, using a mouse line expressing green fluorescent protein knocked in under the control of the Sb9 promoter, we demonstrate that Sb9 expression is highest in those tissue-resident and migratory DC subsets capable of cross-presentation...
December 23, 2016: Molecular Immunology
https://www.readbyqxmd.com/read/27998198/edema-with-hypoalbuminemia-as-a-rare-manifestation-of-chronic-graft-versus-host-disease-after-allogeneic-hematopoietic-cell-transplant
#18
Jonathan J Hogan, Alison W Loren, Matthew G Denker, James K Mangan
No abstract text is available yet for this article.
December 21, 2016: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/27984478/reliability-of-the-arch-height-index-as-a-measure-of-foot-structure-in-children
#19
Lisa C Drefus, Paz Kedem, Siobhan M Mangan, David M Scher, Howard J Hillstrom
PURPOSE: To determine the intrarater and interrater reliability of the arch height index (AHI) in children developing typically. The AHI is tested with a device that measures foot structure. METHODS: Thirty children, ages 6 to 12 years, participated for a total of n = 60 feet. The AHI measurements were taken by 2 investigators in sitting and standing and repeated twice by each investigator in a single visit. Intrarater and interrater reliabilities were determined using intraclass correlation coefficient (ICC) (2,1) statistical analysis...
January 2017: Pediatric Physical Therapy
https://www.readbyqxmd.com/read/27974170/getting-it-right-the-first-time-defining-regionally-relevant-training-curricula-and-provider-core-competencies-for-point-of-care-ultrasound-education-on-the-african-continent
#20
Margaret Salmon, Megan Landes, Cheryl Hunchak, Justin Paluku, Luc Malemo Kalisya, Christian Salmon, Mundenga Mutendi Muller, Benjamin Wachira, James Mangan, Kajal Chhaganlal, Joseph Kalanzi, Aklilu Azazh, Sara Berman, El-Sayed Zied, Hein Lamprecht
Significant evidence identifies point-of-care ultrasound (PoCUS) as an important diagnostic and therapeutic tool in resource-limited settings. Despite this evidence, local health care providers on the African continent continue to have limited access to and use of ultrasound, even in potentially high-impact fields such as obstetrics and trauma. Dedicated postgraduate emergency medicine residency training programs now exist in 8 countries, yet no current consensus exists in regard to core PoCUS competencies...
February 2017: Annals of Emergency Medicine
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