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https://www.readbyqxmd.com/read/29350437/diffusion-tensor-imaging-mri-of-sickle-cell-kidney-disease-initial-results-and-comparison-with-iron-deposition
#1
Shannon B Donnola, Connie M Piccone, Lan Lu, Joshua Batesole, Jane Little, Katherine M Dell, Chris A Flask
Chronic kidney disease (CKD) occurs in over one-third of patients with sickle cell disease (SCD) and can progress to end-stage renal disease. Unfortunately, current clinical assessments of kidney function are insensitive to early-stage CKD. Previous studies have shown that diffusion magnetic resonance imaging (MRI) can sensitively detect regional renal microstructural changes associated with early-stage CKD. However, previous MRI studies in patients with SCD have been largely limited to the detection of renal iron deposition assessed by T2 * relaxometry...
January 19, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29350351/convection-enhanced-delivery-of-cetuximab-conjugated-iron-oxide-nanoparticles-for-treatment-of-spontaneous-canine-intracranial-gliomas
#2
A Courtenay Freeman, Simon R Platt, Shannon Holmes, M Kent, Kelsey Robinson, Elizabeth Howerth, Joe Eagleson, Alexandros Bouras, Milota Kaluzova, Constantinos G Hadjipanayis
Cetuximab conjugated iron-oxide nanoparticles (cetuximab-IONPs) have shown both in-vitro and in-vivo anti-tumor efficacy against gliomas. The purpose of this pilot study was to evaluate the safety and potential efficacy of cetuximab-IONPs for treatment of spontaneously occurring intracranial gliomas in canines after convection-enhanced delivery (CED). The use of CED allowed for direct infusion of the cetuximab-IONPs both intratumorally and peritumorally avoiding the blood brain barrier (BBB) and limiting systemic effects...
January 19, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29349739/enhanced-reductive-dechlorination-of-1-1-1-trichloroethane-using-zero-valent-iron-biochar-carrageenan-microspheres-preparation-and-microcosm-study
#3
Changling Ji, Liang Meng, Hualin Wang
In this study, a composite remediation material for the enhanced reductive dechlorination (ERD) of 1,1,1-trichloroethane (1,1,1-TCA) in aqueous solution was prepared. This material was comprised of biochar as the carrier and adsorbent, and carrageenan (CG) as the embedding medium to entrap the organic carbon sources and zero-valent iron (ZVI). We determined the suitable biochar dosage and organic carbon source in the composite alongside the optimal preparation conditions. Furthermore, using an anaerobic microcosm study, we discussed the performance and possible mechanisms of the composite on 1,1,1-TCA removal in aqueous solution...
January 18, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29344709/microbial-characterization-of-methanogenic-and-iron-reducing-consortium-in-reactors-with-polychlorinated-biphenyls
#4
Mara R de Lima E Silva, Regiane C Correa, Isabel K Sakamoto, Maria B A Varesche
Recent papers have confirmed current environmental pollution and the continuous release of polychlorinated biphenyls (PCBs) despite the prohibition of its manufacture worldwide. As the dehalogenating microorganisms are able to remove halogens from various analogous compounds, the characterization of PCB metabolisms can improve the degradation of similar compounds. Thus, this study extensively evaluated the microbial community developed in methanogenic and iron-reducing reactors. The horizontal-flow anaerobic reactor (HAIB) with real waste of Aroclor (1 mL L-1) was fed with mineral medium, ethanol, and sodium formate...
January 17, 2018: Current Microbiology
https://www.readbyqxmd.com/read/29343830/biological-rejuvenation-of-iron-oxides-in-bioturbated-marine-sediments
#5
Jacob P Beam, Jarrod J Scott, Sean M McAllister, Clara S Chan, James McManus, Filip J R Meysman, David Emerson
The biogeochemical cycle of iron is intricately linked to numerous element cycles. Although biological processes that catalyze the reductive side of the iron cycle are established, little is known about microbial oxidative processes on iron cycling in sedimentary environments-resulting in the formation of iron oxides. Here we show that a potential source of sedimentary iron oxides originates from the metabolic activity of iron-oxidizing bacteria from the class Zetaproteobacteria, presumably enhanced by burrowing animals in coastal sediments...
January 17, 2018: ISME Journal
https://www.readbyqxmd.com/read/29343241/clinical-features-and-dysfunctions-of-iron-metabolism-in-parkinson-disease-patients-with-hyper-echogenicity-in-substantia-nigra-a-cross-sectional-study
#6
Shu-Yang Yu, Chen-Jie Cao, Li-Jun Zuo, Ze-Jie Chen, Teng-Hong Lian, Fang Wang, Yang Hu, Ying-Shan Piao, Li-Xia Li, Peng Guo, Li Liu, Qiu-Jin Yu, Rui-Dan Wang, Piu Chan, Sheng-di Chen, Xiao-Min Wang, Wei Zhang
BACKGROUND: Transcranial ultrasound is a useful tool for providing the evidences for the early diagnosis and differential diagnosis of Parkinson disease (PD). However, the relationship between hyper echogenicity in substantia nigra (SN) and clinical symptoms of PD patients remains unknown, and the role of dysfunction of iron metabolism on the pathogenesis of SN hyper echogenicity is unclear. METHODS: PD patients was detected by transcranial sonography and divided into with no hyper echogenicity (PDSN-) group and with hyper echogenicity (PDSN+) group...
January 17, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29338237/reactivity-of-metal-carbenes-with-olefins-theoretical-insights-on-the-carbene-electronic-structure-and-cyclopropanation-reaction-mechanism
#7
Égil da Brito Sá, Albert Rimola, Luis Rodríguez-Santiago, Mariona Sodupe, Xavier Solans-Monfort
Present work addresses the reactivity of several phenyl-substituted metal-carbene complexes with 4-methylstyrene by means of DFT(OPBE) simulations. Different paths that lead to cyclopropanation have been explored and compared to the olefin metathesis mechanism. For this purpose, we have chosen different catalysts: i) the Grubbs 2nd generation olefin metathesis catalyst, ii) a Grubs 2nd generation-like complex, in which ruthenium is replaced by an iron atom, and iii) two iron carbene complexes that experimentally catalyze alkene cyclopropanation...
January 17, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29336556/linking-spectral-induced-polarization-sip-and-subsurface-microbial-processes-results-from-sand-column-incubation-experiments
#8
Adrian Mellage, Christina M Smeaton, Alex Furman, Estella Atekwana, Fereidoun Rezanezhad, Philippe Van Cappellen
Geophysical techniques, such as Spectral Induced Polarization (SIP), offer potentially powerful approaches for in-situ monitoring of subsurface biogeochemistry. The successful implementation of these techniques as monitoring tools for reactive transport phenomena, however, requires the de-convolution of multiple contributions to measured signals. Here, we present SIP spectra and complementary biogeochemical data obtained in saturated columns packed with alternating layers of ferrihydrite-coated and pure quartz sand, and inoculated with Shewanella oneidensis supplemented with lactate and nitrate...
January 16, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29335593/bacterial-iron-reduction-and-biogenic-mineral-formation-for-the-stabilisation-of-corroded-iron-objects
#9
Wafa M Kooli, Lucrezia Comensoli, Julien Maillard, Monica Albini, Arnaud Gelb, Pilar Junier, Edith Joseph
Exploiting bacterial metabolism for the stabilisation of corroded iron artefacts is a promising alternative to conventional conservation-restoration methods. Bacterial iron reduction coupled to biogenic mineral formation has been shown to promote the conversion of reactive into stable corrosion products that are integrated into the natural corrosion layer of the object. However, in order to stabilise iron corrosion, the formation of specific biogenic minerals is essential. In this study, we used the facultative anaerobe Shewanella loihica for the production of stable biogenic iron minerals under controlled chemical conditions...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29334926/-r-%C3%AE-lipoic-acid-inhibits-fructose-induced-myoglobin-fructation-and-the-formation-of-advanced-glycation-end-products-ages-in-vitro
#10
Hardik Ghelani, Valentina Razmovski-Naumovski, Rajeswara Rao Pragada, Srinivas Nammi
BACKGROUND: Fructose-mediated protein glycation (fructation) has been linked to an increase in diabetic and cardiovascular complications due to over consumption of high-fructose containing diets in recent times. The objective of the present study is to evaluate the protective effect of (R)-α-lipoic acid (ALA) against fructose-induced myoglobin fructation and the formation of advanced glycation end products (AGEs) in vitro. METHODS: The anti-glycation activity of ALA was determined using the formation of AGEs fluorescence intensity, iron released from the heme moiety of myoglobin and the level of fructosamine...
January 15, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29334586/a-non-heme-iron-photocatalyst-for-light-driven-aerobic-oxidation-of-methanol
#11
Wesley Richard Browne, Juan Chen, Apparao Draksharapu, Maja Gruden, Stepan Stepanovic
The non-heme (L)FeIII and (L)FeIII-O-FeIII(L) complexes (L = 1,1-di(pyridin-2-yl)-N,N-bis(pyridin-2-ylmethyl)ethan-1-amine) undergoes reduction under irradiation to the FeII state with concomitant oxidation of methanol to methanal, without the need for a secondary photosensitizer. Spectroscopic and Density Functional Theory (DFT) studies support a mechanism in which irradiation results in charge transfer excitation of a FeIII--O-FeIII complex to generate [(L)FeIV=O]2+ (observed transiently during irradiation in acetonitrile), and an equivalent of LFeII...
January 15, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29333048/astaxanthin-ameliorates-hepatic-damage-and-oxidative-stress-in-carbon-tetrachloride-administered-rats
#12
Md Ariful Islam, Md Abdullah Al Mamun, Md Faruk, Md Tauhid Ul Islam, Md Mizanur Rahman, Mohammad Nazmul Alam, A F M Towheedur Rahman, Hasan Mahmud Reza, Md Ashraful Alam
Background: Astaxanthin is of carotenoids group which possess strong antioxidant properties. The present study was conducted to evaluate the hepatoprotective effects of astaxanthin in carbon tetrachloride (CCl4)-treated rats. Materials and Methods: Female Long-Evans rats were administered with CCl4 orally (1 ml/kg) twice a week for 2 weeks and were treated with astaxanthin (10 mg/kg) every day for 2 weeks. Blood plasma samples were isolated from each group and were analyzed for alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase activities...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332396/an-electrochemical-system-for-the-study-of-trans-plasma-membrane-electron-transport-in-whole-eukaryotic-cells
#13
Harry G Sherman, Carolyn Jovanovic, Snow Stolnik, Frankie James Rawson
The development of new assays to study trans-plasma membrane electron transport (tPMET) in eukaryotic systems is paramount for a number reasons, which include the further understanding of the underlying biology which can then potentially be applied to innovate technological advancements in biosensing, microbial fuel, and pharmaceutical fields. The current literature provides methodology to study these systems that hinges upon mitochondrial knockout genotypes, or the detection of ferrocyanide using colorimetric methods...
January 15, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29330894/structure-function-and-evolution-of-the-hemerythrin-like-domain-superfamily
#14
Claudia Alvarez-Carreño, Vikram Alva, Arturo Becerra, Antonio Lazcano
Hemerythrin-like proteins have generally been studied for their ability to reversibly bind oxygen through their binuclear non-heme iron centers. However, in recent years, it has become increasingly evident that some members of the hemerythrin-like superfamily also participate in many other biological processes. For instance, the binuclear non-heme iron site of YtfE, a hemerythrin-like protein involved in the repair of iron centers in Escherichia coli, catalyzes the reduction of nitric oxide to nitrous oxide, and the human F-box/LRR-repeat protein 5, which contains a hemerythrin-like domain, is involved in intracellular iron homeostasis...
January 13, 2018: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/29330821/effects-of-ferrous-sulfate-amendment-and-water-management-on-rice-growth-and-metal-loid-accumulation-in-arsenic-and-lead-co-contaminated-soil
#15
Lina Zou, Shu Zhang, Dechao Duan, Xinqiang Liang, Jiyan Shi, Jianming Xu, Xianjin Tang
Arsenic (As) and lead (Pb) commonly co-exist with high concentrations in paddy soil mainly due to human activities in south of China. This study investigates the effect of ferrous sulfate (FeSO4) amendment and water management on rice growth and arsenic (As) and lead (Pb) accumulation in rice plants. A paddy soil co-contaminated with As and Pb was chosen for the pot experiment with three FeSO4 levels (0, 0.25, and 1%, on a dry weight basis) and two water managements (flooded, non-flooded). The concentrations of As and Pb in iron plaques and rice plants were determined...
January 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29329987/quantitative-proteomics-in-friedreich-s-ataxia-b-lymphocytes-a-valuable-approach-to-decipher-the-biochemical-events-responsible-for-pathogenesis
#16
Lorène Télot, Elodie Rousseau, Emmanuel Lesuisse, Camille Garcia, Bastien Morlet, Thibaut Léger, Jean-Michel Camadro, Valérie Serre
Friedreich's ataxia (FRDA) represents the most frequent type of autosomal-recessively inherited ataxia and is caused by the deficiency of frataxin, a mitochondrial protein. It is known that frataxin-deficiency leads to alterations in cellular and mitochondrial iron metabolism and impacts in the cell physiology at several levels. Frataxin is thought to play a role in iron-sulfur cluster biogenesis and heme synthesis. Currently, cellular antioxidant defense is dysregulated when frataxin is deficient, which exacerbates oxidative damage in FRDA...
January 9, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29329081/presence-of-fe-al-binary-oxide-adsorbent-cake-layer-in-ceramic-membrane-filtration-and-their-impact-for-removal-of-ha-and-bsa
#17
Kyung-Jo Kim, Am Jang
To enhance the removal of natural organic matter (NOM) in ceramic (Ce) membrane filtration, an iron-aluminum binary oxide (FAO) was applied to the ceramic membrane surface as the adsorbent cake layer, and it was compared with heated aluminum oxide (HAO) for the evaluation of the control of NOM. Both the HAO and FAO adsorbent cake layers efficiently removed the NOM regardless of NOM's hydrophobic/hydrophilic characteristics, and the dissolved organic carbon (DOC) removal in NOM for FAO was 1-1.12 times greater than that for HAO, which means FAO was more efficient in the removal of DOC in NOM...
January 5, 2018: Chemosphere
https://www.readbyqxmd.com/read/29328668/bis-dinitrogen-cobalt-i-complexes-with-nhc-ligation-synthesis-characterization-and-their-dinitrogen-functionalization-reactions-affording-side-on-bound-diazene-complexes
#18
Yafei Gao, Guangyu Li, Liang Deng
Late transition-metal-based catalysts are widely used in N2 fixation reactions, but the reactivity of late transition-metal N2 complexes, besides of iron N2 complexes, remained poorly understood as their N2 complexes were thought labile and hard to be functionalized. By employing a monodentate N-heterocyclic carbene (NHC), 1,3-dicyclohexyl-imidazol-2-ylidene (ICy) as ligand, the cobalt(0)- and cobalt(-1)-N2 complexes, [(ICy)3Co(N2)] (1) and [(ICy)2Co(N2)2M]n (M = K, 2a; Rb, 2b; Cs, 2c), respectively, were synthesized from the stepwise reduction of (ICy)3CoCl by the corresponding alkaline metals under a N2 atmosphere...
January 12, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29328635/adsorption-and-molecular-fractionation-of-dissolved-organic-matter-on-iron-bearing-mineral-matrices-of-varying-crystallinity
#19
Elizabeth K Coward, Tsutomu Ohno, Alain F Plante
Iron (Fe)-bearing mineral phases contribute disproportionately to adsorption of soil organic matter (SOM), due to their elevated chemical reactivity and specific surface area (SSA). However, the spectrum of Fe solid-phase speciation present in oxidation-reduction-active soils challenges analysis of SOM-mineral interactions and may induce differential molecular fractionation of dissolved organic matter (DOM). This work used paired selective dissolution experiments and batch sorption of post-extraction residues to 1) quantify the contributions of Fe-bearing minerals of varying crystallinity to DOM sorption, and 2) characterize molecular fractionation using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)...
January 12, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29327189/using-a-high-organic-matter-biowall-to-treat-a-trichloroethylene-plume-at-the-beaver-dam-road-landfill
#20
Gabriela T Niño de Guzmán, Cathleen J Hapeman, Patricia D Millner, Laura L McConnell, Dana Jackson, David Kindig, Alba Torrents
Trichloroethylene (TCE) is a highly effective industrial degreasing agent and known carcinogen. It was frequently buried improperly in landfills and has subsequently become one of the most common groundwater and soil contaminants in the USA. A common strategy to remediate TCE-contaminated sites and to prevent movement of the TCE plumes into waterways is to construct biowalls which consist of biomaterials and amendments to enhance biodegradation. This approach was chosen to contain a TCE plume emanating from a closed landfill in Maryland...
January 11, 2018: Environmental Science and Pollution Research International
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