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Journal of Trace Elements in Medicine and Biology

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https://www.readbyqxmd.com/read/30115501/zinc-overload-mediated-by-zinc-oxide-nanoparticles-as-innovative-anti-tumor-agent
#1
Nadine Wiesmann, Martin Kluenker, Philipp Demuth, Walburgis Brenner, Wolfgang Tremel, Juergen Brieger
The predicted global cancer burden is expected to surpass 20 million new cancer cases by 2025. Despite recent advancement in tumor therapy, a successful cancer treatment remains challenging. The emerging field of nanotechnology offers great opportunities for diagnosis, imaging, as well as treatment of cancer. Zinc oxide nanoparticles (ZnO NP) were shown to exert selective cytotoxicity against tumor cells via a yet unknown mechanism, most likely involving the generation of reactive oxygen species (ROS). These nanoparticles are a promising therapeutic opportunity as zinc is a nontoxic trace element and its application in medically-related products is considered to be safe...
August 7, 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29970283/analysis-of-lead-and-cadmium-in-cereal-products-and-duplicate-diets-of-a-small-group-of-selected-brisbane-children-for-estimation-of-daily-metal-exposure
#2
Ujang Tinggi, Niikee Schoendorfer
Exposure to toxic metals such as lead (Pb) and cadmium (Cd) from foods is a concern for young children. The aims of the study were to analyse the levels of Pb and Cd in breakfast cereals, rice products and diets of selected children, and to estimate the daily intakes of Pb and Cd in these children. The samples (n = 82) of ready-to-eat breakfast cereals and rice products (n = 36) were collected and obtained from various markets in Brisbane, Australia. The samples for a duplicate diet study were collected for 3 consecutive days from normal healthy children (n = 15)...
June 28, 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895379/evaluation-of-the-uptake-storage-and-cell-effects-of-nano-iron-in-enterocyte-like-cell-models
#3
Daniel Turiel-Fernández, Jörg Bettmer, Maria Montes-Bayón
The therapy with nanocompounds is widely used to treat Fe deficiency and an emerging trend to inhibit tumor growth. The present work aims to address the management of different FeONP, comparing sucrose covered FeONP and Fe nanoparticles in the form of the ferritin with non-particulated inorganic Fe (II) by enterocytes-like colon cancer cell lines (Caco-2 and HT-29). Iron uptake results revealed significantly higher Fe incorporation in the case of nanoparticulated Fe, first in the form of FeONP and second in the form of ferritin with respect to inorganic Fe (II)...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895378/effect-of-anti-rheumatic-treatment-on-selenium-levels-in-inflammatory-arthritis
#4
Gia Deyab, Ingrid Hokstad, Jan Aaseth, Milada Cvancarova Småstuen, Jon Elling Whist, Stefan Agewall, Torstein Lyberg, Dag Tveiten, Gunnbjorg Hjeltnes, Kazem Zibara, Ivana Hollan
OBJECTIVES: The reason for increased cardiovascular risk in inflammatory arthritis (IA) is unclear. Interestingly, selenium-deficiency is suspected to contribute to the development of cardiovascular disease (CVD) in the general population. Although the reference range of serum selenium (s-selenium) is 50-120 μg/L, there are indications that levels up to 85 μg/L might not be sufficient for optimal cardioprotection. Our aim was to examine s-selenium levels in rheumatoid arthritis (RA), psoriatic arthritis (PsA) and ankylosing spondylitis (AS), to evaluate the effect of anti-rheumatic treatment on s-selenium levels, and to assess relationships between s-selenium levels and clinical and laboratory parameters including markers of disease activity and CVD risk...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895377/zinc-aspartate-suppresses-proliferation-and-th1-th2-th17-cytokine-production-of-pre-activated-human-t-cells-in-vitro
#5
Karina Guttek, Linda Wagenbrett, Annegret Reinhold, Kurt Grüngreiff, Dirk Reinhold
The essential trace element zinc, necessary for many biological processes of living organisms, plays a regulatory role in the maintenance of immune functions. Zinc deficiency affects components of both the innate and the adaptive immune system. On the other side, zinc is capable of suppressing activation and proliferation of human T cells. In the present study, we investigated the effect of zinc aspartate (Unizink® ), an approved drug to treat zinc deficiency, on pre-activated human T cells (T cell blasts) in vitro...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895376/effect-of-various-calcium-salts-on-non-heme-iron-bioavailability-in-fasted-women-of-childbearing-age
#6
Valeria Candia, Israel Ríos-Castillo, Frank Carrera-Gil, Berta Vizcarra, Manuel Olivares, Sotiris Chaniotakis, Fernando Pizarro
INTRODUCTION: Micronutrient deficiencies are one of the most important public health issues worldwide and iron (Fe) deficiency anemia is the most prevalent micronutrient deficiency. Iron deficiency often coexists with calcium deficiency and iron and calcium supplementation often overlap. This has led to investigations into the interaction between these two minerals, and whether calcium may inhibit iron absorption in the gut. OBJECTIVE: To determine the effect of various calcium salts on non-heme iron bioavailability in fasted women of childbearing age...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895375/obesity-diabetes-and-zinc-a-workshop-promoting-knowledge-and-collaboration-between-the-uk-and-israel-november-28-30-2016-israel
#7
EDITORIAL
Alicia Jenkins, Imre Lengyel, Guy A Rutter, Nicola Lowe, Iris Shai, Amir Tirosh, Tunde Petro, Mogher Khamaisi, Simon Andrews, Niv Zmora, Atan Gross, Wolfgang Maret, Eli C Lewis, Arie Moran
No abstract text is available yet for this article.
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895374/compounds-containing-trace-element-copper-or-zinc-exhibit-as-potent-hyperuricemia-inhibitors-via-xanthine-oxidase-inactivation
#8
Lan-Zhu Li, Guo-Xiu Zhou, Jia Li, Wei Jiang, Bao-Lin Liu, Wen Zhou
Compounds containing trace elements copper or zinc are potential gout and hyperuricemia suppressant by virtue of their inhibiting effect on xanthine oxidase/xanthine dehydrogenase (XOD/XDH) and anti-inflammatory and anti-oxidative function. In this study, compounds Cu(hmy-paa)·SO4 ·H2 O (simplified as CuHP) and Zn(hmy-paa)·SO4 ·H2 O (simplified as ZnHP) are synthesized, where hmy-paa stands for 3-(4-hydroxy-3-methoxyphenyl)-N-(1H-pyrazol-3-yl)acrylamide). The ligand hmy-paa is composed of functional ferulic acid and 3-aminopyrazole...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895373/selectivity-and-sensitivity-of-molybdenum-oxide-polycaprolactone-nanofiber-composites-on-skin-cancer-preliminary-in-vitro-and-in-vivo-implications
#9
Indrakumar Janani, Rachita Lakra, Manikantan Syamala Kiran, Purna Sai Korrapati
Cancer nanomedicine has emerged as a revolution in the last decade opening up promising strides for the cancer treatment. The major challenge in these therapeutic approaches resides in the failure of clinical trials owing to the immunological cancer microenvironment. Therefore, the success of next generation nanomedicine depends on tunable physicochemical nanomaterial design and corresponding clinical trials by integrating targeted delivery with mitigated toxicity. The present study deals with the fabrication of nanofibrous scaffold impregnated with molybdenum nanoparticles for targeted skin cancer therapeutics...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895372/prolonged-stimulation-of-insulin-release-from-min6-cells-causes-zinc-depletion-and-loss-of-%C3%AE-cell-markers
#10
Rebecca Lawson, Wolfgang Maret, Christer Hogstrand
Zinc is integral for the normal function of pancreatic β-cells in glycaemic control. Large amounts of zinc are secreted from β-cells following insulin exocytosis and regulated replenishment is required, which is thought to be mediated by the ZIP family of zinc importer proteins. Within Type 2 Diabetic patients, β-cells are stressed through prolonged stimulation by hyperglycaemia and this is thought to be a major factor contributing to loss of β-cell identity and mass. However, the consequences for the β-cell zinc status remain largely unexplored...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895371/biomarkers-of-selenium-status-and-antioxidant-effect-in-workers-occupationally-exposed-to-mercury
#11
Renata Kuras, Edyta Reszka, Edyta Wieczorek, Ewa Jablonska, Jolanta Gromadzinska, Beata Malachowska, Lucyna Kozlowska, Magdalena Stanislawska, Beata Janasik, Wojciech Wasowicz
The present observation based research was designed to evaluate the influence of occupational human exposure to metallic mercury (Hg°) vapor on the biomarkers of selenium status involved in the antioxidant defense system. For this purpose we determined Hg and selenium (Se) concentrations in body fluids, the markers of antioxidant effect measured as an activity of Se-dependent enzymes (red blood cell and plasma glutathione peroxidase: GPx1-RBC and GPx3-P), concentration of selenoprotein P in the plasma (SeP-P) and total antioxidant activity in the plasma (TAA-P) in 131 male workers from a chloralkali plant exposed to Hg° and 67 non-exposed males (control group)...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895370/expression-of-zinc-transporters-zip4-zip14-and-znt9-in-hepatic-carcinogenesis-an-immunohistochemical-study
#12
Laura Gartmann, Thomas Wex, Kurt Grüngreiff, Dirk Reinhold, Thomas Kalinski, Peter Malfertheiner, Kerstin Schütte
INTRODUCTION: Dysregulation of both, systemic zinc levels and tissue-specific zinc transporters, is reported in chronic inflammatory and malignant liver disease (hepatocellular carcinoma, HCC). Aim of this study is to assess the expression level of three zinc transporters in liver tissue and HCC: ZIP4, ZIP14 and ZnT9. METHODS: The study is based on tissue samples obtained from 138 patients with histologically proven HCC. Tissue specimens from tumor (n = 138) and extra-lesional specimens (n = 72) were assessed immunohistochemically for the expression of the three zinc transporters...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895369/differential-expression-of-zinc-transporters-accompanies-the-differentiation-of-c2c12-myoblasts
#13
Amanda L Paskavitz, Julia Quintana, Daniella Cangussu, Cristina Tavera-Montañez, Yao Xiao, Sonia Ortiz-Miranda, Juan G Navea, Teresita Padilla-Benavides
Zinc transporters facilitate metal mobilization and compartmentalization, playing a key role in cellular development. Little is known about the mechanisms and pathways of Zn movement between Zn transporters and metalloproteins during myoblast differentiation. We analyzed the differential expression of ZIP and ZnT transporters during C2C12 myoblast differentiation. Zn transporters account for a transient decrease of intracellular Zn upon myogenesis induction followed by a gradual increase of Zn in myotubes. Considering the subcellular localization and function of each of the Zn transporters, our findings indicate that a fine regulation is necessary to maintain correct metal concentrations in the cytosol and subcellular compartments to avoid toxicity, maintain homeostasis, and for loading metalloproteins needed during myogenesis...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895368/validation-of-a-dilute-and-shoot-method-for-quantification-of-12-elements-by-inductively-coupled-plasma-tandem-mass-spectrometry-in-human-milk-and-in-cow-milk-preparations
#14
Stéphane Dubascoux, Daniel Andrey, Mario Vigo, Peter Kastenmayer, Eric Poitevin
Nutritional information about human milk is essential as early human growth and development have been closely linked to the status and requirements of several macro- and micro-elements. However, methods addressing whole mineral profiling in human milk have been scarce due in part to their technical complexities to accurately and simultaneously measure the concentration of micro- and macro-trace elements in low volume of human milk. In the present study, a single laboratory validation has been performed using a "dilute and shoot" approach for the quantification of sodium (Na), magnesium (Mg), phosphorus (P), potassium (K), calcium (Ca), manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), selenium (Se), molybdenum (Mo) and iodine (I), in both human milk and milk preparations...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895367/development-validation-and-application-of-an-icp-ms-ms-method-to-quantify-minerals-and-ultra-trace-elements-in-human-serum
#15
Sören Meyer, Mariya Markova, Gabriele Pohl, Talke A Marschall, Olga Pivovarova, Andreas F H Pfeiffer, Tanja Schwerdtle
Multi-element determination in human samples is very challenging. Especially in human intervention studies sample volumes are often limited to a few microliters and due to the high number of samples a high-throughput is indispensable. Here, we present a state-of-the-art ICP-MS/MS-based method for the analysis of essential (trace) elements, namely Mg, Ca, Fe, Cu, Zn, Mo, Se and I, as well as food-relevant toxic elements such as As and Cd. The developed method was validated regarding linearity of the calibration curves, method LODs and LOQs, selectivity and trueness as well as precision...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895366/effect-of-maternal-and-neonatal-factors-on-neonatal-thyroid-stimulating-hormone-results-from-a-population-based-prospective-cohort-study-in-china
#16
Yixin Zhang, Cong Du, Wei Wang, Wen Chen, Ping Shao, Chongdan Wang, Junhong Leng, Jun Shen, Long Tan, Wanqi Zhang
OBJECTIVE: Neonatal TSH screening is effective in detecting congenital hypothyroidism and estimating iodine status in a given population, but various factors influence TSH levels. The aim of this study was to evaluate the effect of maternal and neonatal factors on neonatal TSH levels. DESIGN AND SETTING: Data were obtained from an ongoing prospective cohort study. A total of 988 pregnant women and their newborn infants participated in the study from April 2015 to May 2017 at Tianjin Maternal and Child Health Center and Tanggu Maternity Hospital in Tianjin, China...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895365/the-effects-of-various-levels-of-boron-supplementation-on-live-weight-plasma-lipid-peroxidation-several-biochemical-and-tissue-antioxidant-parameters-of-male-mice-effects-of-boron-on-performance-antioxidant-and-some-metabolits-of-mice
#17
Varol Kurtoglu, Firuze Kurtoglu, Pınar Peker Akalin
In this study, live weight, live weight gain, plasma GPx, GR, LDH, ALT activities, triglyceride, total protein, albumin and LPO levels, also liver and brain SOD and GPx activities were investigated after administration of boron (0.10, 0.20 and 0.30 mg/day) into male mice with drinking water for 60 days. Blood albumin and triglyceride levels were not affected with boron (p > 0.05) where triglyceride levels, with increasing amounts of boron, displayed a slight decrease within the normal ranges. From the antioxidant-oxidant balance parameters, LPO and GR levels were not affected from boron, where GPx activity was increased significantly (p < 0...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895364/influence-of-boric-acid-on-energy-metabolism-and-stress-tolerance-of-candida-albicans
#18
Martin Schmidt, Dominic Tran-Nguyen, Patrick Chizek
Boron presents at physiological pH in the form of boric acid (BA), a molecule that has both positive and negative effects on biological processes. In medicine, BA is used as a topical treatment for vaginal yeast infections by Candida species because of its well-documented but poorly understood effect on inhibition of growth in general and of invasive, hyphal growth in particular. The present study examines the influence of BA on carbohydrate energy metabolism of this common human pathogen. Starting from previous findings about an inhibition of key NAD-dependent enzymes by BA in vitro, we confirmed that such an inhibition occurs in permeabilized C...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895363/low-dose-thimerosal-ethyl-mercury-is-still-used-in-infants-vaccines-should-we-be-concerned-with-this-form-of-exposure
#19
REVIEW
José G Dórea
In developing countries, Thimerosal-containing vaccines (TCV) are the main causes of organic Hg exposure for newborns, neonates, and infants immunized with TCV. This article addresses early-life exposure to this unique organic mercury compound (ethylmercury-EtHg) and the risks of its exposure. English language studies pertaining to Thimerosal/EtHg toxicity and exposure during early life were searched in PubMed; and, those publications judged to be relevant to the topic of this review were selected. The risk from the neurotoxic effects of pre- and post-natal Hg exposures depend, in part, on aggravating or attenuating environmental and/or genetic-associated factors...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29895362/trace-determination-of-cobalt-in-biological-fluids-based-on-preconcentration-with-a-new-competitive-ligand-using-dispersive-liquid-liquid-microextraction-combined-with-slotted-quartz-tube-flame-atomic-absorption-spectrophotometry
#20
Elif Öztürk Er, Emine Gülhan Bakırdere, Tuğçe Unutkan, Sezgin Bakırdere
A new competitive ligand has been synthesized for the preconcentration to obtain lower detection limits by using dispersive liquid-liquid microextraction combined with slotted quartz tube-flame atomic absorption spectrophotometry (DLLME-SQT-FAAS). The proposed method is simple, eco-friendly and has high sensitivity. The preconcentration procedure was optimized on the basis of various parameters affecting the complex formation and extraction efficiency such as pH and volume of buffer solution, volume of ligand solution, mixing period, volume and type of extraction solvent, volume and type of dispersive solvent, and salt effect...
September 2018: Journal of Trace Elements in Medicine and Biology
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