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https://www.readbyqxmd.com/read/28218005/evaluation-of-cardiac-and-hepatic-iron-overload-in-thalassemia-major-patients-with-t2-magnetic-resonance-imaging
#1
Pustika Amalia Wahidiyat, Felix Liauw, Damayanti Sekarsari, Siti Ayu Putriasih, Vasili Berdoukas, Dudley J Pennell
OBJECTIVES: Recent advancements have promoted the use of T2* magnetic resonance imaging (MRI) in the non-invasive detection of iron overload in various organs for thalassemia major patients. This study aims to determine the iron load in the heart and liver of patients with thalassemia major using T2* MRI and to evaluate its correlation with serum ferritin level and iron chelation therapy. METHODS: This cross-sectional study included 162 subjects diagnosed with thalassemia major, who were classified into acceptable, mild, moderate, or severe cardiac and hepatic iron overload following their T2* MRI results, respectively, and these were correlated to their serum ferritin levels and iron chelation therapy...
February 20, 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/28216238/dinitrosyl-iron-complexes-with-natural-thiol-containing-ligands-in-aqueous-solutions-synthesis-and-some-physico-chemical-characteristics-a-methodological-review
#2
REVIEW
Anatoly F Vanin, Rostislav R Borodulin, Vasak D Mikoyan
Two approaches to the synthesis of dinitrosyl iron complexes (DNIC) with glutathione and l-cysteine in aqueous solutions based on the use of gaseous NO and appropriate S-nitrosothiols, viz., S-nitrosoglutathione (GS-NO) or S-nitrosocysteine (Cys-NO), respectively, are considered. A schematic representation of a vacuum unit for generation and accumulation of gaseous NO purified from the NO2 admixture and its application for obtaining aqueous solutions of DNIC in a Thunberg apparatus is given. To achieve this, a solution of bivalent iron in distilled water is loaded into the upper chamber of the Thunberg apparatus, while the thiol solution in an appropriate buffer (рН 7...
February 12, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28212723/redox-dynamics-of-manganese-as-a-mitochondrial-life-death-switch
#3
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/28212635/impact-of-semi-solid-formulations-on-skin-penetration-of-iron-oxide-nanoparticles
#4
Umberto M Musazzi, Benedetta Santini, Francesca Selmin, Valentina Marini, Fabio Corsi, Raffaele Allevi, Anna M Ferretti, Davide Prosperi, Francesco Cilurzo, Miriam Colombo, Paola Minghetti
BACKGROUND: This work aimed to provide useful information on the incidence of the choice of formulation in semi-solid preparations of iron-oxide nanoparticles (IONs). The appropriate analytical methods to assess the IONs physical stability and the effect of the semi-solid preparations on IONs human skin penetration were discussed. The physical stability of IONs (Dh = 31 ± 4 nm; ζ = -65 ± 5 mV) loaded in five semi-solid preparations (0.3% w/v), namely Carbopol gel (CP), hydroxyethyl cellulose gel (HEC), carboxymethylcellulose gel (CMC), cetomacrogol cream (Cet) and cold cream was assessed by combining DLS and low-field pulsed NMR data...
February 17, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/28210967/core-shell-drug-carrier-from-folate-conjugated-chitosan-obtained-from-prawn-shell-for-targeted-doxorubicin-delivery
#5
Md Sazedul Islam, Papia Haque, Taslim U Rashid, M Nuruzzaman Khan, Abul K Mallik, M Nazrul I Khan, Mala Khan, Mohammed Mizanur Rahman
A multifunctional drug carrier with dual targeting (magnetic and folate-receptor) and pH sensitive core-shell hybrid nanomaterial has been developed to carry an anticancer drug doxorubicin.Superparamagnetic iron oxide nanoparticles (IONPs) were used as core of the carrier and cross-linked folate conjugated chitosan (FA-CS) was acted as shell in which doxorubicin was physically entrapped. Transmission electron microscopy (TEM) analysis confirmed the average particle size of IONPs and FA-CS coated IONPs 8.2 and 15...
April 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28205448/association-between-red-meat-consumption-and-colon-cancer-a-systematic-review-of-experimental-results
#6
Nancy D Turner, Shannon K Lloyd
A role for red and processed meat in the development of colorectal cancer has been proposed based largely on evidence from observational studies in humans, especially in those populations consuming a westernized diet. Determination of causation specifically by red or processed meat is contingent upon identification of plausible mechanisms that lead to colorectal cancer. We conducted a systematic review of the available evidence to determine the availability of plausible mechanistic data linking red and processed meat consumption to colorectal cancer risk...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28198186/esterification-of-the-primary-benzylic-c-h-bonds-with-carboxylic-acids-catalyzed-by-ionic-iron-iii-complexes-containing-an-imidazolinium-cation
#7
Bing Lu, Fan Zhu, Hong-Mei Sun, Qi Shen
The first iron-catalyzed esterification of the primary benzylic C-H bonds with carboxylic acids using di-tert-butyl peroxide as an oxidant is achieved by novel ionic iron(III) complexes containing an imidazolinium cation. The use of well-defined, air-stable, and available iron(III) complex in a 5 mol % loading and readily available starting materials with a broad generality and outstanding sterically hindered tolerance renders this methodology a useful alternative to other protocols that are typically employed for the synthesis of benzyl esters...
February 15, 2017: Organic Letters
https://www.readbyqxmd.com/read/28195692/size-controlled-pd-nanoparticle-catalysts-prepared-by-galvanic-displacement-into-a-porous-si-iron-oxide-nanoparticle-host
#8
Taeho Kim, Xin Fu, David Warther, Michael J Sailor
Porous silicon nanoparticles containing both Pd and iron oxide nanoparticles are prepared and studied as magnetically recoverable catalysts for organic reductions. The Pd nanoparticles are generated in situ by electroless deposition of Pd(NH3)4(2+), where the porous Si skeleton acts as both a template and as a reducing agent and the released ammonia ligands raise the local pH to exert control over the size of the Pd nanoparticles. The nanocomposites are characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), nitrogen adsorption, X-ray diffraction (XRD), superconducting quantum interference device (SQUID) magnetization, and dynamic light scattering (DLS)...
February 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28195673/ultrasound-enhanced-sirna-delivery-using-magnetic-nanoparticle-loaded-chitosan-deoxycholic-acid-nanodroplets
#9
Jeong Yu Lee, Calum Crake, Boon Teo, Dario Carugo, Marie de Saint Victor, Anjali Seth, Eleanor Stride
Small interfering RNA (siRNA) has significant therapeutic potential but its clinical translation has been severely inhibited by a lack of effective delivery strategies. Previous work has demonstrated that perfluorocarbon nanodroplets loaded with magnetic nanoparticles can facilitate the intracellular delivery of a conventional chemotherapeutic drug. The aim of this study is to determine whether a similar agent can provide a means of delivering siRNA, enabling efficient transfection without degradation of the molecule...
February 13, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28193224/microrna-mir-29-controls-a-compensatory-response-to-limit-neuronal-iron-accumulation-during-adult-life-and-aging
#10
Roberto Ripa, Luca Dolfi, Marco Terrigno, Luca Pandolfini, Aurora Savino, Valeria Arcucci, Marco Groth, Eva Terzibasi Tozzini, Mario Baumgart, Alessandro Cellerino
BACKGROUND: A widespread modulation of gene expression occurs in the aging brain, but little is known as to the upstream drivers of these changes. MicroRNAs emerged as fine regulators of gene expression in many biological contexts and they are modulated by age. MicroRNAs may therefore be part of the upstream drivers of the global gene expression modulation correlated with aging and aging-related phenotypes. RESULTS: Here, we show that microRNA-29 (miR-29) is induced during aging in short-lived turquoise killifish brain and genetic antagonism of its function induces a gene-expression signature typical of aging...
February 13, 2017: BMC Biology
https://www.readbyqxmd.com/read/28192365/zero-valent-metal-loaded-silica-nanoparticles-for-the-removal-of-tnt-from-water
#11
Harsha Mangal, Amit Saxena, Nivedita Shukla, P K Rai, A S Rawat, Vivek Kumar, Vatsana Gupta, Monika Datta
Silica nanoparticles with a surface area of 673.60 m(2)/g and particle size of 8-12 nm were prepared using aerogel process (AP) followed by super critical drying. Zero valent Fe, Co, Pt, and bimetallic Fe/Pt and Fe/Co were loaded using an incipient wetness impregnation technique and subsequent reduction. Scanning electron microscopy-energy dispersive X-ray (SEM-EDX) and transmission electron microscopy-energy dispersive X-ray (TEM-EDX) characterizations indicated fine dispersion of iron on AP-SiO2 +Fe system...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28192360/selective-fenton-like-oxidation-of-methylene-blue-on-modified-fe-zeolites-prepared-via-molecular-imprinting-technique
#12
Yuanyuan Zhang, Jiaobo Shang, Yanqun Song, Chuan Rong, Yinghui Wang, Wenyu Huang, Kefu Yu
A facile strategy to increase the selectivity of heterogeneous Fenton oxidation is investigated. The increase was reached by increasing selective adsorption of heterogeneous Fenton catalyst to a target pollutant. The heterogeneous Fenton catalyst was prepared by a two-step process. First, zeolite particles were imprinted by the target pollutant, methylene blue (MB), in their aggregations, and second, iron ions were loaded on the zeolite aggregations to form the molecule imprinted Fe-zeolites (MI-FZ) Fenton catalyst...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28191450/remotely-triggered-nano-theranostics-for-cancer-applications
#13
Alexandra Sneider, Derek VanDyke, Shailee Paliwal, Prakash Rai
Nanotechnology has enabled the development of smart theranostic platforms that can concurrently diagnose disease, start primary treatment, monitor response, and, if required, initiate secondary treatments. Recent in vivo experiments demonstrate the promise of using theranostics in the clinic. In this paper, we review the use of remotely triggered theranostic nanoparticles for cancer applications, focusing heavily on advances in the past five years. Remote triggering mechanisms covered include photodynamic, photothermal, phototriggered chemotherapeutic release, ultrasound, electro-thermal, magneto-thermal, X-ray, and radiofrequency therapies...
2017: Nanotheranostics (Syd)
https://www.readbyqxmd.com/read/28187348/ferrous-iron-peroxymonosulfate-oxidation-as-a-pretreatment-for-ceramic-ultrafiltration-membrane-control-of-natural-organic-matter-fouling-and-degradation-of-atrazine
#14
Xiaoxiang Cheng, Heng Liang, An Ding, Xiaobin Tang, Bin Liu, Xuewu Zhu, Zhendong Gan, Daoji Wu, Guibai Li
Ferrous iron/peroxymonosulfate (Fe(II)/PMS) oxidation was employed as a pretreatment method for ultrafiltration process to control membrane fouling caused by natural organic matter, including humic acid (HA), sodium alginate (SA), bovine serum albumin (BSA), and their mixture (HA-SA-BSA). To evaluate the mechanism of fouling mitigation, the effects of Fe(II)/PMS pretreatment on the characteristics of feed water were examined. The degradation of atrazine (ATZ) was also investigated and the species of generated radicals were preliminarily determined...
February 1, 2017: Water Research
https://www.readbyqxmd.com/read/28185478/multifunctional-magnetic-co-delivery-system-coated-with-polymer-mpeg-pll-fa-for-nasopharyngeal-cancer-targeted-therapy-and-mr-imaging
#15
Hailiang Li, Chaoping Fu, Xiangwan Miao, Quanming Li, Juan Zhang, Huikang Yang, Tao Liu, Xi Chen, Minqiang Xie
The gene and drug co-delivery system has become one of the primary strategies to overcome cancers. Here, we designed a multifunctional magnetic co-delivery system for nasopharyngeal carcinoma-targeted therapy and MR imaging. Aldehyde sodium alginate (ASA) was used to decorate the oxide iron and load cisplain through coordinate bond to form a core complex. The polymer shell poly(l-lysine)-methoxy-polyethylene glycol-folate was used to coat the core complex through electric interaction to give this nano-medicine a target ability...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28183642/magnetic-nanoparticle-loaded-electrospun-polymeric-nanofibers-for-tissue-engineering
#16
Heng Zhang, JiYi Xia, XianLun Pang, Ming Zhao, BiQiong Wang, LingLin Yang, HaiSu Wan, JingBo Wu, ShaoZhi Fu
Magnetic nanoparticles have been one of the most attractive nanomaterials for various biomedical applications including magnetic resonance imaging (MRI), diagnostic contrast enhancement, magnetic cell separation, and targeted drug delivery. Three-dimensional (3-D) fibrous scaffolds have broad application prospects in the biomedical field, such as drug delivery and tissue engineering. In this work, a novel three-dimensional composite membrane composed of the tri-block copolymer poly(ε-caprolactone)-poly(ethylene glycol)-poly(ε-caprolactone) (PCL-PEG-PCL, PCEC) and magnetic iron oxide nanoparticles (Fe3O4 NPs) were fabricated using electrospinning technology...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28171838/a-comparative-study-of-ozonation-iron-coated-zeolite-catalyzed-ozonation-and-granular-activated-carbon-catalyzed-ozonation-of-humic-acid
#17
Dilek Gümüş, Feryal Akbal
This study compares ozonation (O3), iron coated zeolite catalyzed ozonation (ICZ-O3) and granular activated carbon catalyzed ozonation (GAC-O3) for removal of humic acid from an aqueous solution. The results were evaluated by the removal of DOC that specifies organic matter, UV254 absorbance, SUVA (Specific Ultraviolet Absorbance at 254 nm) and absorbance at 436 nm. When ozonation was used alone, DOC removal was 21.4% at an ozone concentration of 10 mg/L, pH 6.50 and oxidation time of 60 min. The results showed that the use of ICZ or GAC as a catalyst increased the decomposition of humic acid compared to ozonation alone...
January 24, 2017: Chemosphere
https://www.readbyqxmd.com/read/28169261/comparative-evaluation-of-tooth-substance-loss-and-its-correlation-with-the-abrasivity-and-chemical-composition-of-different-dentifrices
#18
Ram Prakash Singh, Sidhartha Sharma, Ajay Logani, Naseem Shah, Surendra Singh
CONTEXT: In India, teeth cleaning with tooth powder is common in rural and semi-urban areas. These dentifrices may contain low-quality abrasives, which may have a deleterious effect on dental hard tissues. AIMS: This study aims to evaluate the tooth substance loss caused by different dentifrices and to correlate it with chemical composition, size, and shape of abrasives used. SETTINGS AND DESIGN: An indigenously made automated machine was used for brushing the specimens...
November 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28167110/synthesis-of-a-novel-biocompatible-nanocomposite-of-graphene-oxide-and-magnetic-nanoparticles-for-drug-delivery
#19
Majid Aliabadi, Hamidreza Shagholani, Arash Yunessnia Lehi
The combination of imaging and delivery systems through nanoscale material have been used to create new nanoparticle formulations for biological applications. Here, a magnetic nanocomposite consisting of superparamagnetic iron oxide nanoparticles (SPIONs), graphene oxide (GO), chitosan and poly(vinyl alcohol) (PVA) as biocompatible polymers was synthesized for applying in drug delivery and imaging agent. The nanocomposite was studied by various techniques including XRD, TEM, FE-SEM, FT-IR and VSM. SPIONs had an average diameter size about 10nm and showed superparamagnetic behavior...
February 3, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28164384/design-of-organic-macrocycle-modified-iron-oxide-nanoparticles-for-drug-delivery
#20
Ali Trabolsi, Tina Skorjanc, Farah Benyettou, John-Carl Olsen
Paul Ehrlich's vision of a "magic bullet" cure for disease inspires the modern design of nanocarriers whose purpose is to deliver drug cargo to specific sites in the body while circumventing endogenous immunological clearance mechanisms. Iron-oxide nanoparticles (IONPs) have emerged as particularly promising nanocarriers because of their biodegradability, ability to be guided magnetically to sites of pathology, mediation of hyperthermic therapy and imaging capabilities. In this review, we focus on the design and drug-delivery aspects of IONPs coated with organic macrocycles (crown ethers, cyclodextrins, calix[n]arenes, cucurbit[n]urils, or pillar[n]arenes) which, by means of reversible complexation, allow for the convenient loading and release of drug molecules...
February 5, 2017: Chemistry: a European Journal
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