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Zinc homeostasis

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https://www.readbyqxmd.com/read/28919410/tetrabromobisphenol-a-disturbs-zinc-homeostasis-in-cultured-cerebellar-granule-cells-a-dual-role-in-neurotoxicity
#1
Elzbieta Zieminska, Anna Ruszczynska, Jerzy W Lazarewicz
The brominated flame retardant tetrabromobisphenol A (TBBPA) has recognized neurotoxic properties mediated by intracellular Ca(2+) imbalance and oxidative stress. Although these factors are known to trigger the release of Zn(2+) from intracellular stores, the effects of TBBPA on Zn(2+) homeostasis in neurons and the role of Zn(2+)in TBBPA neurotoxicity have not yet been studied. Therefore, we investigated zinc transients in primary cultures of rat cerebellar granule cells and assessed their involvement in TBBPA neurotoxicity...
September 14, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28918363/changes-in-zn-homeostasis-during-long-term-culture-of-primary-endothelial-cells-and-effects-of-zn-on-endothelial-cell-senescence
#2
Marco Malavolta, Laura Costarelli, Robertina Giacconi, Andrea Basso, Francesco Piacenza, Elisa Pierpaoli, Mauro Provinciali, Ogo A Ogo, Dianne Ford
Endothelial cell senescence and Zn nutritional status influence cardiovascular disease. The influence of Zn appears dichotomous, hence it is imperative to understand the relationship with cellular senescence to improve knowledge about the molecular and cellular basis of the disease. Here we aimed to determine: 1) the impact of chronic exposure to a moderately high dose of Zn on senescence of endothelial cells; 2) the changes in Zn homeostasis during the lifespan of primary cultured endothelial cells; and 3) the susceptibility of proliferating and senescent endothelial cells to cell death after short term exposure to increasing doses of Zn and of the Zn chelator TPEN...
September 13, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28912786/co-infection-of-sweet-orange-with-severe-and-mild-strains-of-citrus-tristeza-virus-is-overwhelmingly-dominated-by-the-severe-strain-on-both-the-transcriptional-and-biological-levels
#3
Shimin Fu, Jonathan Shao, Changyong Zhou, John S Hartung
Citrus tristeza is one of the most destructive citrus diseases and is caused by the phloem-restricted Closterovirus, Citrus tristeza virus. Mild strain CTV-B2 does not cause obvious symptoms on indicators whereas severe strain CTV-B6 causes symptoms, including stem pitting, cupping, yellowing, and stiffening of leaves, and vein corking. Our laboratory has previously characterized changes in transcription in sweet orange separately infected with CTV-B2 and CTV-B6. In the present study, transcriptome analysis of Citrus sinensis in response to double infection by CTV-B2 and CTV-B6 was carried out...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28898501/growth-of-pseudomonas-aeruginosa-in-zinc-poor-environments-is-promoted-by-a-nicotianamine-related-metallophore
#4
Maria Chiara Mastropasqua, Melania D'Orazio, Mauro Cerasi, Francesca Pacello, Angelo Gismondi, Antonella Canini, Lorena Canuti, Ada Consalvo, Domenico Ciavardelli, Barbara Chirullo, Paolo Pasquali, Andrea Battistoni
Previous studies have suggested that P. aeruginosa possesses redundant zinc uptake systems. To identify uncharacterized zinc transporters, we analyzed the genome-wide transcriptional responses of P. aeruginosa PA14 to zinc restriction. This approach led to the identification of an operon (zrmABCD) regulated by the zinc uptake regulator Zur, that encodes for a metallophore-mediated zinc import system. This operon includes the genes for an uncharacterized TonB-dependent Outer Membrane Protein (ZrmA) and for a putative nicotianamine synthase (ZrmB)...
September 12, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28890580/the-role-of-compost-in-stabilizing-the-microbiological-and-biochemical-properties-of-zinc-stressed-soil
#5
Rafał Strachel, Jadwiga Wyszkowska, Małgorzata Baćmaga
The progressive development of civilization and intensive industrialization has contributed to the global pollution of the natural environment by heavy metals, especially the soil. Degraded soils generally contain less organic matter, and thus, their homeostasis is more often disturbed, which in turn manifests in changes in biological and physicochemical properties of the soil. Therefore, new possibilities and solutions for possible neutralization of these contaminations are sought, inter alia, through reclamation of degraded land...
2017: Water, Air, and Soil Pollution
https://www.readbyqxmd.com/read/28889936/decreased-zinc-and-increased-lead-blood-levels-are-associated-with-endometriosis-in-asian-women
#6
Guan-Lin Lai, Chih-Ching Yeh, Ching-Ying Yeh, Ruey-Yu Chen, Chiung-Lin Fu, Chi-Huang Chen, Chii-Ruey Tzeng
Endometriosis is an inflammatory disease associated with multiple pathogenic factors and studies regarding roles of trace metals in endometriosis have been inconsistent and limited. The aim of this cross-sectional study was to compare the blood levels of miscellaneous trace metals measured by inductively coupled plasma mass spectrometry in infertile women with and without endometriosis. Zinc level is associated with declining odds (adjusted OR=0.39, 95% CI=0.18-0.88) of endometriosis. By contrast, lead level is associated with increasing odds (adjusted OR=2...
September 7, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28889271/neurotoxicity-of-metal-mixtures
#7
V M Andrade, M Aschner, A P Marreilha Dos Santos
Metals are the oldest toxins known to humans. Metals differ from other toxic substances in that they are neither created nor destroyed by humans (Casarett and Doull's, Toxicology: the basic science of poisons, 8th edn. McGraw-Hill, London, 2013). Metals are of great importance in our daily life and their frequent use makes their omnipresence and a constant source of human exposure. Metals such as arsenic [As], lead [Pb], mercury [Hg], aluminum [Al] and cadmium [Cd] do not have any specific role in an organism and can be toxic even at low levels...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28889262/inherited-disorders-of-manganese-metabolism
#8
Charles E Zogzas, Somshuvra Mukhopadhyay
While the neurotoxic effects of manganese were recognized in 1837, the first genetic disorder of manganese metabolism was described only in 2012 when homozygous mutations in SLC30A10 were reported to cause manganese-induced neurotoxicity. Two other genetic disorders of manganese metabolism have now been described - mutations in SLC39A14 cause manganese toxicity, while mutations in SLC39A8 cause manganese and zinc deficiency. Study of rare genetic disorders often provides unique insights into disease pathobiology, and the discoveries of these three inherited disorders of manganese metabolism are already transforming our understanding of manganese homeostasis, detoxification, and neurotoxicity...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28887543/the-oxidative-state-of-cysteine-thiol-144-regulates-the-sirt6-glucose-homeostat
#9
David Long, Hanzhi Wu, Allen W Tsang, Leslie B Poole, Barbara K Yoza, Xianfeng Wang, Vidula Vachharajani, Cristina M Furdui, Charles E McCall
Control of glucose homeostasis plays a critical role in health and lifespan and its dysregulation contributes to inflammation, cancer and aging. NAD + dependent Sirtuin 6 (SIRT6) is a glucose homeostasis regulator in animals and humans and its regulation at the molecular level is unknown. Here, we report that a cysteine thiol redox sensor contributes to the role of SIRT6 in controlling glucose homeostasis. Sulfenylation of SIRT6 occurs in THP1 cells and primary human promonocytes during inflammation and in splenocytes from mice with sepsis...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28886561/zinc-protects-against-cadmium-induced-toxicity-by-regulating-oxidative-stress-ions-homeostasis-and-protein-synthesis
#10
Jingmei Pan, Xinhe Huang, Yuxing Li, Ming Li, Ning Yao, Zhengdong Zhou, Xueru Li
The widespread environmental toxin cadmium (Cd) is associated with numerous human diseases. The essential trace element zinc (Zn) strongly counteracts Cd-induced toxicity; however, the mechanism is incompletely understood. Here, we conducted RNA sequencing and bioinformatics analyses to determine the global gene expression profiles of yeast cells exposed to Cd or Cd plus Zn. We identified 912 Cd-induced and 627 Cd plus Zn-induced differentially expressed genes (DEGs). Adding Zn during Cd exposure efficiently reversed the expression of 92...
August 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28883816/modulation-of-zinc-homeostasis-in-acanthamoeba-castellanii-as-a-possible-antifungal-strategy-against-cryptococcus-gattii
#11
Nicole S Ribeiro, Francine M Dos Santos, Ane W A Garcia, Patrícia A G Ferrareze, Laura F Fabres, Augusto Schrank, Livia Kmetzsch, Marilise B Rott, Marilene H Vainstein, Charley C Staats
Cryptococcus gattii is a basidiomycetous yeast that can be found in the environment and is one of the agents of cryptococcosis, a life-threatening disease. During its life cycle, cryptococcal cells take hold inside environmental predators such as amoebae. Despite their evolutionary distance, macrophages and amoebae share conserved similar steps of phagocytosis and microbial killing. To evaluate whether amoebae also share other antifungal strategies developed by macrophages, we investigated nutritional immunity against cryptococcal cells...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28879625/effects-of-arsenic-compounds-on-microminerals-content-and-antioxidant-enzyme-activities-in-rat-liver
#12
Ana Cláudia Ferreira Souza, Sarah Cozzer Marchesi, Graziela Domingues de Almeida Lima, Mariana Machado-Neves
Interactions of arsenic with essential trace elements may result in disturbances on body homeostasis. In the present study, we aimed to investigate the effects of different arsenic compounds on micromineral content and antioxidant enzyme activities in rat liver. Male Wistar rats were randomly divided into five groups and exposed to sodium arsenite and sodium arsenate at 0.01 and 10 mg/L for 8 weeks in drinking water. The concentration of arsenic increased in the liver of all arsenic-exposed animals. The proportion of zinc and copper increased in animals exposed to 0...
September 6, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28877212/selenium-deficiency-induced-alterations-in-ion-profiles-in-chicken-muscle
#13
Haidong Yao, Xia Zhao, Ruifeng Fan, Hamid Sattar, Jinxin Zhao, Wenchao Zhao, Ziwei Zhang, Yufeng Li, Shiwen Xu
Ion homeostasis plays important roles in development of metabolic diseases. In the present study, we examined the contents and distributions of 25 ions in chicken muscles following treatment with selenium (Se) deficiency for 25 days. The results revealed that in chicken muscles, the top ranked microelements were silicon (Si), iron (Fe), zinc (Zn), aluminum (Al), copper (Cu) and boron (B), showing low contents that varied from 292.89 ppb to 100.27 ppm. After Se deficiency treatment, essential microelements [Cu, chromium (Cr), vanadium (V) and manganese (Mn)], and toxic microelements [cadmium (Cd) and mercury (Hg)] became more concentrated (P < 0...
2017: PloS One
https://www.readbyqxmd.com/read/28875161/crystal-structures-of-a-zip-zinc-transporter-reveal-a-binuclear-metal-center-in-the-transport-pathway
#14
Tuo Zhang, Jian Liu, Matthias Fellner, Chi Zhang, Dexin Sui, Jian Hu
Zrt/Irt-like proteins (ZIPs) play fundamental roles in metal metabolism/homeostasis and are broadly involved in numerous physiological and pathological processes. The lack of high-resolution structure of the ZIPs hinders understanding of the metal transport mechanism. We report two crystal structures of a prokaryotic ZIP in lipidic cubic phase with bound metal substrates (Cd(2+) at 2.7 Å and Zn(2+) at 2.4 Å). The structures revealed a novel 3+2+3TM architecture and an inward-open conformation occluded at the extracellular side...
August 2017: Science Advances
https://www.readbyqxmd.com/read/28867395/nanoformulated-copper-zinc-superoxide-dismutase-exerts-differential-effects-on-glucose-vs-lipid-homeostasis-depending-on-the-diet-composition-possibly-via-altered-ampk-signaling
#15
Gopalakrishnan Natarajan, Curtis Perriotte-Olson, Fatema Bhinderwala, Robert Powers, Cyrus V Desouza, Geoffrey A Talmon, Jiang Yuhang, Matthew C Zimmerman, Alexander V Kabanov, Viswanathan Saraswathi
Evidence suggests that superoxide dismutase 1 (SOD1) promotes glucose vs lipid metabolism depending on the diet type. We recently reported that nanoformulated SOD1 (Nano) improved lipid metabolism without altering glucose homeostasis in high-fat (HF) diet-fed mice. Here, we sought to determine the effects and potential mechanisms of Nano in modulating glucose and lipid homeostasis in mice fed a normal chow diet (CD) vs HF diet. Mice were fed a CD or a HF diet (45%) for 10 wk and injected with Nano once every 2 days for 15 days...
October 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28865957/zinc-binds-non-cooperatively-to-human-liver-metallothionein-2a-at-physiological-ph
#16
Devika P Jayawardena, Ilka U Heinemann, Martin J Stillman
Maintenance of the homeostasis of zinc is very important in regulating bodily functions. There are over 300 Zn-dependent enzymes identified where Zn(II) plays a structural or catalytic role. However, an excess of Zn(II) in a cell is toxic and free Zn(II) is tightly controlled. Metallothioneins (MTs) are small cysteine rich proteins that can bind up to seven Zn(II) and act as a Zn(II) reservoir. The MT2a isoform is predominantly found in the liver. This study focused on designing an MT2a construct of recombinant human MT2a to determine the Zn(II) binding profile of MT2a in vitro...
August 30, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28864500/kr%C3%A3-ppel-like-factor-5-is-essential-for-maintenance-of-barrier-function-in-mouse-colon
#17
Yang Liu, Martyn Chidgey, Vincent W Yang, Agnieszka B Bialkowska
Krüppel-like factor 5 (KLF5) is a member of the zinc finger family of transcription factors that regulates homeostasis of the intestinal epithelium. Previous studies suggested an indispensable role of KLF5 in maintaining intestinal barrier function. In the current study, we investigated the mechanisms by which KLF5 regulates colonic barrier function in vivo and in vitro. We used an inducible and a constitutive intestine-specific Klf5 knockout mouse model (Villin-CreER(T2);Klf5(fl/fl) designated as Klf5(ΔIND) and Villin-Cre;Klf5(fl/fl) as Klf5(ΔIS) ), and studied an inducible KLF5 knockdown in Caco-2 BBe cells using a lentiviral Tet-on system (Caco-2 BBe KLF5ΔIND)...
September 1, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28858729/effect-of-zinc-gluconate-sage-oil-on-inflammatory-patterns-and-hyperglycemia-in-zinc-deficient-diabetic-rats
#18
Mohamed M Elseweidy, Abdel-Moniem A Ali, Nabila Zein Elabidine, Nada M Mursey
BACKGROUND: The relationship between zinc homeostasis and pancreatic function had been established. In this study we aimed firstly to configure the inflammatory pattern and hyperglycemia in zinc deficient diabetic rats. Secondly to illustrate the effect of two selected agents namely Zinc gluconate and sage oil (Salvia Officinalis, family Lamiaceae). METHODS: Rats were fed on Zinc deficient diet, deionized water for 28days along with Zinc level check up at intervals to achieve zinc deficient state then rats were rendered diabetic through receiving one dose of alloxan monohydrate (120mg/kg) body weight, classified later into 5 subgroups...
August 28, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28857086/ccctc-binding-factor-is-essential-to-the-maintenance-and-quiescence-of-hematopoietic-stem-cells-in-mice
#19
Tae-Gyun Kim, Sueun Kim, Soyeon Jung, Mikyoung Kim, Bobae Yang, Min-Geol Lee, Hyoung-Pyo Kim
Hematopoiesis involves a series of lineage differentiation programs initiated in hematopoietic stem cells (HSCs) found in bone marrow (BM). To ensure lifelong hematopoiesis, various molecular mechanisms are needed to maintain the HSC pool. CCCTC-binding factor (CTCF) is a DNA-binding, zinc-finger protein that regulates the expression of its target gene by organizing higher order chromatin structures. Currently, the role of CTCF in controlling HSC homeostasis is unknown. Using a tamoxifen-inducible CTCF conditional knockout mouse system, we aimed to determine whether CTCF regulates the homeostatic maintenance of HSCs...
August 25, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28854710/pseudomonas-aeruginosa-trent-and-zinc-homeostasis
#20
Corey B Davies, Mark D Harrison, Flavia Huygens
Pseudomonas aeruginosa is a Gram-negative pathogen and the major cause of mortality in patients with cystic fibrosis. The mechanisms that P. aeruginosa strains use to regulate intracellular zinc have an effect on infection, antibiotic resistance and the propensity to form biofilms. However, zinc homeostasis in P. aeruginosa strains of variable infectivity has not been compared. In this study, zinc homeostasis in P. aeruginosa Trent, a highly infectious clinical strain, was compared to that of a laboratory P...
September 1, 2017: FEMS Microbiology Letters
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