keyword
MENU ▼
Read by QxMD icon Read
search

Toxic stress

keyword
https://www.readbyqxmd.com/read/28437768/glomeromycota-communities-survive-extreme-levels-of-metal-toxicity-in-an-orphan-mining-site
#1
I Sánchez-Castro, V Gianinazzi-Pearson, J C Cleyet-Marel, E Baudoin, D van Tuinen
Abandoned tailing basins and waste heaps of orphan mining sites are of great concern since extreme metal contamination makes soil improper for any human activity and is a permanent threat for nearby surroundings. Although spontaneous revegetation can occur, the process is slow or unsuccessful and rhizostabilisation strategies to reduce dispersal of contaminated dust represent an option to rehabilitate such sites. This requires selection of plants tolerant to such conditions, and optimization of their fitness and growth...
April 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28437727/new-inter-correlated-genes-targeted-by-diatom-derived-polyunsaturated-aldehydes-in-the-sea-urchin-paracentrotus-lividus
#2
Nadia Ruocco, Anna Maria Fedele, Susan Costantini, Giovanna Romano, Adrianna Ianora, Maria Costantini
The marine environment is continually subjected to the action of stressors (including natural toxins), which represent a constant danger for benthic communities. In the present work using network analysis we identified ten genes on the basis of associated functions (FOXA, FoxG, GFI-1, nodal, JNK, OneCut/Hnf6, TAK1, tcf4, TCF7, VEGF) in the sea urchin Paracentrotus lividus, having key roles in different processes, such as embryonic development and asymmetry, cell fate specification, cell differentiation and morphogenesis, and skeletogenesis...
April 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28437657/toxicity-and-bioaccumulation-of-three-hexabromocyclododecane-diastereoisomers-in-the-marine-copepod-tigriopus-japonicas
#3
Haizheng Hong, Dongmei Lv, Wanxin Liu, Lingming Huang, Leyun Chen, Rong Shen, Dalin Shi
The three major hexabromocyclododecane (HBCD) diastereoisomers, i.e. α-, β- and γ-HBCD, have distinct physical and chemical properties that may potentially result in different levels of bioaccumulation and toxicity in aquatic organisms. To assess the impact of diastereomeric variation in HBCDs, the marine copepod Tigriopus japonicus was exposed to α-, β- and γ-HBCD in isolation. Results showed that all the three diastereoisomers had a similar potency to cause growth delay in T. japonicas. Variation was observed in the overall survival rate with exposure to α- and β-HBCD, and this resulted in significantly higher lethal toxicity in T...
April 18, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28437190/consuming-a-ketogenic-diet-while-receiving-radiation-and-chemotherapy-for-locally-advanced-lung-cancer-and-pancreatic-cancer-the-university-of-iowa-experience-of-two-phase-1-clinical-trials
#4
Amir Zahra, Melissa A Fath, Emyleigh Opat, Kranti A Mapuskar, Sudershan K Bhatia, Daniel C Ma, Samuel N Rodman Iii, Travis P Snyders, Catherine A Chenard, Julie M Eichenberger-Gilmore, Kellie L Bodeker, Logan Ahmann, Brian J Smith, Sandy A Vollstedt, Heather A Brown, Taher Abu Hejleh, Gerald H Clamon, Daniel J Berg, Luke I Szweda, Douglas R Spitz, John M Buatti, Bryan G Allen
Ketogenic diets are low in carbohydrates and high in fat, which forces cells to rely more heavily upon mitochondrial oxidation of fatty acids for energy. Relative to normal cells, cancer cells are believed to exist under a condition of chronic mitochondrial oxidative stress that is compensated for by increases in glucose metabolism to generate reducing equivalents. In this study we tested the hypothesis that a ketogenic diet concurrent with radiation and chemotherapy would be clinically tolerable in locally advanced non-small cell lung cancer (NSCLC) and pancreatic cancer and could potentially exploit cancer cell oxidative metabolism to improve therapeutic outcomes...
April 24, 2017: Radiation Research
https://www.readbyqxmd.com/read/28436682/kinetics-biochemical-and-factorial-analysis-of-chromium-uptake-in-a-multi-ion-system-by-tradescantia-pallida-rose-d-r-hunt
#5
Vibha Sinha, Kannan Pakshirajan, N Arul Manikandan, Rakhi Chaturvedi
Effluent from electroplating and leather industries is a major concern for the environment due to the presence of chromium (Cr) and other ions, such as sulphate, nitrate, phosphate, etc., which needs to be regulated prior to its discharge into the environment. This study evaluated the potential of Tradescantia pallida, a plant species known for its Cr bioaccumulation, for the simultaneous removal of Cr(6+), SO4(2-), NO3(-) and PO4(3-). Different combination levels of Cr(6+) and the co-ions were planned as per the Plackett-Burman design of experiments performed using hydroponics system...
April 24, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28436478/tissue-accumulation-of-microplastics-in-mice-and-biomarker-responses-suggest-widespread-health-risks-of-exposure
#6
Yongfeng Deng, Yan Zhang, Bernardo Lemos, Hongqiang Ren
Microplastics (MPs) are a significant environmental health issue and increasingly greater source of concern. MPs have been detected in oceans, rivers, sediments, sewages, soil and even table salts. MPs exposure on marine organisms and humans has been documented, but information about the toxicity of MPs in mammal is limited. Here we used fluorescent and pristine polystyrene microplastics (PS-MPs) particles with two diameters (5 μm and 20 μm) to investigate the tissue distribution, accumulation, and tissue-specific health risk of MPs in mice...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28435886/discovery-of-a-novel-antifungal-agent-in-the-pathogen-box
#7
François L Mayer, James W Kronstad
Human fungal pathogens cause over 2 million infections per year and are major drivers of morbidity and mortality. Cryptococcus neoformans and Candida albicans are two of the most common fungal pathogens of humans, together accounting for a staggering 1.4 million infections annually, with very high mortality rates. Patients with dysfunctional immune systems, such as individuals with HIV/AIDS, are particularly susceptible to fungal infections. Unfortunately, relatively few antifungal drugs are currently available and fungi frequently develop resistance, further complicating treatment approaches...
March 2017: MSphere
https://www.readbyqxmd.com/read/28435267/the-acute-pulmonary-and-thrombotic-effects-of-cerium-oxide-nanoparticles-after-intratracheal-instillation-in-mice
#8
Abderrahim Nemmar, Suhail Al-Salam, Sumaya Beegam, Priya Yuvaraju, Badreldin H Ali
Cerium oxide nanoparticles (CeO2 NPs), used as a diesel fuel catalyst, can be emitted into the ambient air, resulting in exposure to humans by inhalation. Recent studies have reported the development of lung toxicity after pulmonary exposure to CeO2 NPs. However, little is known about the possible thrombotic effects of these NPs. The present study investigated the acute (24 hours) effect of intratracheal (IT) instillation of either CeO2 NPs (0.1 or 0.5 mg/kg) or saline (control) on pulmonary and systemic inflammation and oxidative stress and thrombosis in mice...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28435068/metal-metal-interaction-mediates-the-iron-induction-of-drosophila-mtnb
#9
Wenjia Qiang, Yunpeng Huang, Zhihui Wan, Bing Zhou
Metallothionein (MT) protein families are a class of small and universal proteins rich in cysteine residues. They are synthesized in response to heavy metal stresses to sequester the toxic ions by metal-thiolate bridges. Five MT family members, namely MtnA, MtnB, MtnC, MtnD and MtnE, have been discovered and identified in Drosophila. These five isoforms of MTs are regulated by metal responsive transcription factor dMTF-1 and play differentiated but overlapping roles in detoxification of metal ions. Previous researches have shown that Drosophila MtnB responds to copper (Cu), cadmium (Cd) and zinc (Zn)...
April 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28434003/cytotoxic-effects-of-transthyretin-aggregates-in-an-epidermoid-cell-line
#10
Vai Hong Fong, Amandio Vieira
OBJECTIVE: Skin amyloid deposits can occur as part of systemic amyloidoses including those involving misfolded- aggregated transthyretins (agTTR). Pathological effects of agTTR on the skin are not well understood. The main objective of the current study was to examine the toxicity of agTTR upon a human keratinocyte cell line. METHODS: Cells were analyzed for indicators of oxidative stress after treatment with normal soluble TTR or the same pre-aggregation concentration of agTTR...
April 22, 2017: Pathobiology: Journal of Immunopathology, Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28433717/response-a-chronic-effects-of-pbde-47-up-regulations-of-hsp60-and-hsp70-expression-in-freshwater-bivalve-anodonta-woodiana
#11
Xichao Xia, Shipeng Xue, Xiying Wang, Qingyuan Zhang, Chuanfeng Huang, Lianghong Guo, Lunguang Yao
Heat shock proteins (HSPs) play an important role in adaption of environmental stress by protein folding, membrane translocation, degradation of misfolded proteins and other regulatory processes. Our previous study showed oxidative stress generated from polybrominated diphenyl ether-47 (PBDE-47) could cause an acute toxicity on freshwater bivalve Anodonta Woodiana, but the effect of chronic toxicity need to be elucidated. In order to further investigate the chronic effect of PBDE-47, clams A. Woodiana were randomly divided into the PBDE-47 treated group administrated with PBDE-47 at a concentration 3...
April 19, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28433592/toxicity-assessment-of-multi-walled-carbon-nanotubes-on-cucurbita-pepo-l-under-well-watered-and-water-stressed-conditions
#12
Mehrnaz Hatami
The rapid increase in the production and application of various types of nanomaterials increases the possibility of their presence in total environment, which subsequently raises concerns about their potential threats to the first trophic level of organisms, specifically under varying environmental constraints. In this work, seeds of Cucurbita pepo L. were cultured in MS basal medium exposed to multi-walled carbon nanotubes (MWCNTs) at different concentrations (0, 125, 250, 500 and 1000μgmL(-1)) under two levels of water potential, well-watered (0MPa) and water stress (-1...
April 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28433109/pathogenesis-of-wilson-disease
#13
Ivo Florin Scheiber, Radan Brůha, Petr Dušek
Wilson disease is an autosomal-recessive disorder originating from a genetic defect in the copper-transporting ATPase ATP7B that is required for biliary copper secretion and loading of ceruloplasmin with copper. Impaired ATP7B function in Wilson disease results in excessive accumulation of copper in liver, brain, and other tissues. Toxic copper deposits may induce oxidative stress, modify expression of genes, directly inhibit proteins, and impair mitochondrial function, leading to hepatic, neuropsychiatric, renal, musculoskeletal, and other symptoms...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28433064/resilience
#14
Gail Hornor
Every child is a unique individual. This individuality is evident in children exposed to psychosocial trauma or adverse childhood experiences. There exists wide variation in the way children respond to toxic stressors in their lives. Some children appear to be relatively unaffected, while others develop a variety of psychological, behavioral, and physical consequences. What is the explanation for this phenomenon? Resiliency has been suggested to explain this variation in pathology expressions in trauma-exposed children...
May 2017: Journal of Pediatric Health Care
https://www.readbyqxmd.com/read/28432978/cadmium-hampers-salt-tolerance-of-sesuvium-portulacastrum
#15
Mariem Wali, Soledad Martos, Laura Pérez-Martín, Chedly Abdelly, Tahar Ghnaya, Charlotte Poschenrieder, Benet Gunsé
It is well known that salinity reduces cadmium toxicity in halophytes. However, the possible interference of Cd with the mechanisms of salt tolerance is poorly explored. The aim of this study was to see whether Cd affects salt tolerance mechanisms in the halophyte Sesuvium portulacastrum. S. portulacastrum plants obtained from cuttings were grown in hydroponics for 3 weeks and then exposed to low (0.09 mM) or moderate (200 mM) NaCl concentrations, alone or in combination with 25 μM CdCl2. Microscopy observation revealed two strategies of salt tolerance: euhalophytism and secretion of salt by bladder cells...
April 13, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28432881/improvement-in-cadmium-tolerance-of-edible-rape-brassica-rapa-l-with-exogenous-application-of-chitooligosaccharide
#16
Haiying Zong, Kecheng Li, Song Liu, Lin Song, Ronge Xing, Xiaolin Chen, Pengcheng Li
Cadmium (Cd) is one of the most toxic heavy metals, which is readily taken up by plant roots and has deleterious effects on crop yield and quality. The study investigated the potential cross-protection roles of chitooligosaccharide (COS) in alleviating Cd toxicity in edible rape (Brassica rapa L.) under greenhouse conditions. The results demonstrated that spraying COS onto the leaves of edible rape could promote the plant growth and leaf chlorophyll contents, decrease the malondialdehyde (MDA) level in leaves as well as the Cd(2+) concentration in shoots and roots of edible rape under Cd stress...
April 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28432686/high-level-of-reduced-glutathione-contributes-to-detoxification-of-lipid-peroxide-derived-reactive-carbonyl-species-in-transgenic-arabidopsis-overexpressing-glutathione-reductase-under-aluminum-stress
#17
Lina Yin, Jun'ichi Mano, Kiyoshi Tanaka, Shiwen Wang, Meijuan Zhang, Xiping Deng, Suiqi Zhang
Lipid peroxide-derived reactive carbonyl species (RCS), generated downstream of reactive oxygen species (ROS), are critical damage-inducing species in plant aluminum (Al) toxicity. In mammals, RCS are scavenged primarily by glutathione (GSH), but in plant Al stress, contribution of GSH to RCS detoxification has not been evaluated. In this study, Arabidopsis plants overexpressing the gene AtGR1 (accession code At3g24170), encoding glutathione reductase (GR), were generated, and their performance under Al stress was examined...
April 21, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28432518/correlation-between-heavy-metal-exposure-and-gstm1-polymorphism-in-iranian-multiple-sclerosis-patients
#18
Mehdi Aliomrani, Mohammad A Sahraian, Hamid Shirkhanloo, Mohammad Sharifzadeh, Mohammad R Khoshayand, Mohammad H Ghahremani
Multiple sclerosis (MS) is an immune-mediated chronic inflammatory disease of the central nervous system. Various exposures to heavy metals can lead to toxicity and oxidative stress. While glutathione-S-transferases are known as oxidative stress-related genes and involved in metal biotransformation. The aim of the present study is to investigate the correlation of GSTM1 polymorphism in MS patients and the possible association with blood concentration of arsenic (As) and cadmium (Cd) as major heavy metal pollutants...
April 21, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28432298/endogenous-two-photon-excited-fluorescence-imaging-characterizes-neuron-and-astrocyte-metabolic-responses-to-manganese-toxicity
#19
Emily Stuntz, Yusi Gong, Disha Sood, Volha Liaudanskaya, Dimitra Pouli, Kyle P Quinn, Carlo Alonzo, Zhiyi Liu, David L Kaplan, Irene Georgakoudi
As neurodegenerative conditions are increasingly linked to mitochondrial dysfunction, methods for studying brain cell metabolism at high spatial resolution are needed to elucidate neurodegeneration mechanisms. Two-photon excited fluorescence (TPEF) imaging is a non-destructive, high-resolution technique for studying cell metabolism via endogenous fluorescence of reduced nicotinamide adenine dinucleotide (phosphate) (NAD(P)H) and flavin adenine dinucleotide (FAD). We employed TPEF to study the metabolism of primary rat astrocyte and neuronal cultures under normal growth conditions and in response to manganese (Mn) treatment...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28431961/ionizing-radiation-induces-long-term-senescence-in-endothelial-cells-through-mitochondrial-respiratory-complex-ii-dysfunction-and-superoxide-generation
#20
Audrey Lafargue, Charlotte Degorre, Isabelle Corre, Marie-Clotilde Alves-Guerra, Marie-Hélène Gaugler, François Vallette, Claire Pecqueur, François Paris
Ionizing radiation causes oxidative stress, leading to acute and late cellular responses. We previously demonstrated that irradiation of non-proliferating endothelial cells, as observed in normal tissues, induces early apoptosis, which can be inhibited by pretreatment with Sphingosine-1-Phosphate. We now propose to better characterize the long-term radiation response of endothelial cells by studying the molecular pathways associated with senescence and its link with acute apoptosis. First, senescence was validated in irradiated quiescent microvascular HMVEC-L in a dose- and time-dependent manner by SA β-galactosidase staining, p16(Ink4a) and p21(Waf1) expression, pro-inflammatory IL-8 secretion and DNA damage response activation...
April 18, 2017: Free Radical Biology & Medicine
keyword
keyword
11264
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"