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https://www.readbyqxmd.com/read/28098182/nephro-toxic-effects-of-intraperitoneally-injected-egcg-in-diabetic-mice-involvement-of-oxidative-stress-inflammation-and-apoptosis
#1
Nora O Abdel Rasheed, Lamiaa A Ahmed, Dalaal M Abdallah, Bahia M El-Sayeh
Epigallocatechin gallate (EGCG) has been studied for its beneficial effects. However, some case reports have associated EGCG supplementation with hepato-toxicity. In the present study, we investigated the possible nephro-toxic effects of EGCG in diabetic mice. Streptozotocin (150 mg/kg, i.p.) was injected in mice for diabetes induction. EGCG (100 mg/kg/day, i.p.) was then given for 4 days. The administration of EGCG to diabetic mice caused 60% mortality with no death recorded in other groups. Blood samples were collected for estimation of serum cystatin C, neutrophil gelatinase-associated lipocalin and blood urea nitrogen...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28094778/adipocyte-fatty-acid-binding-protein-potentiates-toxic-lipids-induced-endoplasmic-reticulum-stress-in-macrophages-via-inhibition-of-janus-kinase-2-dependent-autophagy
#2
Ruby L C Hoo, Lingling Shu, Kenneth K Y Cheng, Xiaoping Wu, Boya Liao, Donghai Wu, Zhiguang Zhou, Aimin Xu
Lipotoxicity is implicated in the pathogenesis of obesity-related inflammatory complications by promoting macrophage infiltration and activation. Endoplasmic reticulum (ER) stress and adipocyte fatty acid binding protein (A-FABP) play key roles in obesity and mediate inflammatory activity through similar signaling pathways. However, little is known about their interplay in lipid-induced inflammatory responses. Here, we showed that prolonged treatment of palmitic acid (PA) increased ER stress and expression of A-FABP, which was accompanied by reduced autophagic flux in macrophages...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28094536/the-novel-induction-of-retinal-ganglion-cell-apoptosis-in-porcine-organ-culture-by-nmda-an-opportunity-for-the-replacement-of-animals-in-experiments
#3
Sandra Kuehn, Jose Hurst, Adelina Jashari, Kathrin Ahrens, Teresa Tsai, Ilan M Wunderlich, H Burkhard Dick, Stephanie C Joachim, Sven Schnichels
Some of the advantages of retina organ culture models include their efficient and easy handling and the ability to standardise relevant parameters. Additionally, when porcine eyes are obtained from the food industry, no animals are killed solely for research purposes. To induce retinal degeneration, a commonly used toxic substance, N-methyl-D-aspartate (NMDA), was applied to the cultures. To this end, organotypic cultures of porcine retinas were cultured and treated with different doses of NMDA (0 [control], 50, 100 and 200μM) on day 2 for 48 hours...
December 2016: Alternatives to Laboratory Animals: ATLA
https://www.readbyqxmd.com/read/28094042/responses-of-the-rotifer-brachionus-plicatilis-to-flame-retardant-bde-47-stress
#4
Xiaoyang Jian, Xuexi Tang, Ningning Xu, Jingjing Sha, You Wang
A series of short-term toxicological tests were conducted on the rotifer Brachionus plicatilis to assess the toxicity of the flame retardant 2,2',4,4'-tetrabrominated biphenyl ether (BDE-47). BDE-47 increased mortality, morphological damage, and altered population dynamics and fecundity of rotifer. Antioxidant enzymes were differentially changed to maintain the balance between antioxidant and pro-oxidant activity. However, with increases in the concentration of BDE-47, the metabolic and antioxidant activity decreased...
January 13, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28093673/metagenomic-insights-into-effects-of-spent-engine-oil-perturbation-on-the-microbial-community-composition-and-function-in-a-tropical-agricultural-soil
#5
Lateef B Salam, Sunday O Obayori, Francisca O Nwaokorie, Aisha Suleiman, Raheemat Mustapha
Analyzing the microbial community structure and functions become imperative for ecological processes. To understand the impact of spent engine oil (SEO) contamination on microbial community structure of an agricultural soil, soil microcosms designated 1S (agricultural soil) and AB1 (agricultural soil polluted with SEO) were set up. Metagenomic DNA extracted from the soil microcosms and sequenced using Miseq Illumina sequencing were analyzed for their taxonomic and functional properties. Taxonomic profiling of the two microcosms by MG-RAST revealed the dominance of Actinobacteria (23...
January 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28093221/exposure-to-metal-oxide-nanoparticles-in-physiological-fluid-induced-synergistic-biological-effects-in-a-keratinocyte-model
#6
Deidre S Cathe, Jasmine N Whitaker, Emily K Breitner, Kristen K Comfort
Nanoparticles (NPs) possess distinctive physicochemical properties that in addition to differentiating them from their bulk counterparts can induce negative cellular consequences. Standard in vitro systems have served as the primary model for NP safety evaluations, but suffer from a lack physiological relevance. One way to overcome this limitation and evaluate NP characteristics under more accurate conditions is through the use of artificial physiological fluids, which mimic the composition of in vivo environments...
January 13, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28092763/growth-and-antioxidant-defense-responses-of-wheat-seedlings-to-di-n-butyl-phthalate-and-di-2-ethylhexyl-phthalate-stress
#7
Minling Gao, Youming Dong, Ze Zhang, Wenhua Song, Yun Qi
Phthalate acid esters (PAEs) are vital environmental hormone-like chemicals that are noxious to plants, animals, and human beings. In this study, the influences of di-n-butyl phthalate (DBP) and di (2-ethylhexyl) phthalate (DEHP) on the seed germination, root morphology, and various physiological changes of wheat seedlings were investigated by analyzing superoxide anion (O2(-)) accumulation, antioxidant enzyme activity, and lipid peroxidation. DBP and DEHP were found to obviously inhibit germination only at high concentrations, but significantly affected root morphology even at lower concentrations...
January 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28092742/short-term-in-vivo-exposure-to-graphene-oxide-can-cause-damage-to-the-gut-and-testis
#8
Marta Dziewięcka, Julia Karpeta-Kaczmarek, Maria Augustyniak, Magdalena Rost-Roszkowska
Graphene oxide (GO) has unique physicochemical properties and also has a potentially widespread use in every field of daily life (industry, science, medicine). Demand for nanotechnology is growing every year, and therefore many aspects of its toxicity and biocompatibility still require further clarification. This research assesses the in vivo toxicity of pure and manganese ion-contaminated GO that were administrated to Acheta domesticus with food (at 200mgkg(-1) of food) throughout their ten-day adult life...
January 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28092736/negative-effect-of-chronic-cadmium-exposure-on-growth-histology-ultrastructure-antioxidant-and-innate-immune-responses-in-the-liver-of-zebrafish-preventive-role-of-blue-light-emitting-diodes
#9
Shuang-Shuang Yuan, Zhen-Ming Lv, Ai-Yi Zhu, Jia-Lang Zheng, Chang-Wen Wu
The present study explored the possible preventive effects of blue light emitting diodes (LEDs) on cadmium (Cd)-induced oxidative stress and immunotoxicity in zebrafish. To this end, zebrafish were exposed to a white fluorescent bulb or blue LEDs (LDB, peak at 450nm, at an irradiance of 0.9W/m(2)), and 0 or 30µgL(-1) waterborne Cd for 5 weeks. Growth performance, survival rate, and hepatic histology, ultrastructure, antioxidant and innate immune responses were determined in zebrafish. Cd exposure alone reduced growth and survival rate, and induced oxidative damage and changes in histology and ultrastructure...
January 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28091877/influence-of-enamel-dentin-thickness-on-the-toxic-and-esthetic-effects-of-experimental-in-office-bleaching-protocols
#10
C C de Oliveira Duque, D G Soares, F G Basso, J Hebling, C A de Souza Costa
OBJECTIVES: This paper aims to assess the whitening effectiveness and toxicity of tooth-bleaching protocols applied to enamel/dentin disks simulating mandibular incisors (ICs) and premolars (PMs). MATERIALS AND METHODS: A 10% hydrogen peroxide (H2O2) gel was applied for 3 × 15, 1 × 15, or 1 × 5 min to enamel/dentin disks simulating mandibular ICs and PMs, and the trans-enamel and trans-dentinal diffusion products were applied to human dental pulp cells (1 h)...
January 14, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28091127/amino-modified-polystyrene-nanoparticles-affect-signalling-pathways-of-the-sea-urchin-paracentrotus-lividus-embryos
#11
Annalisa Pinsino, Elisa Bergami, Camilla Della Torre, Maria Luisa Vannuccini, Piero Addis, Marco Secci, Kenneth A Dawson, Valeria Matranga, Ilaria Corsi
Polystyrene nanoparticles have been shown to pose serious risk to marine organisms including sea urchin embryos based on their surface properties and consequently behaviour in natural sea water. The aim of this study is to investigate the toxicity pathways of amino polystyrene nanoparticles (PS-NH2, 50 nm) in Paracentrotus lividus embryos in terms of development and signalling at both protein and gene levels. Two sub-lethal concentrations of 3 and 4 µg/mL of PS-NH2 were used to expose sea urchin embryos in natural sea water (PS-NH2 as aggregates of 143 ± 5 nm)...
January 16, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28090784/effect-of-resveratrol-and-tetracycline-on-the-subacute-paraquat-toxicity-in-mice
#12
R M Satpute, P P Pawar, S Puttewar, S D Sawale, P D Ambhore
Paraquat (PQ) is a nonselective bipyridyl herbicide widely used in agriculture to control weeds, but its accidental, occupational, or intentional exposure in humans is known to cause pneumo- and neurotoxicity which may proves fatal. Oxidative stress is reported as an underlined mechanism of PQ-induced toxicity in alveolar cells, neurons, and astroglia. PQ generates superoxides both through electron transport reaction (ETC) with nicotinamide adenine dinucleotide-dependent oxidoreductase and by the redox cycling via reaction with molecular oxygen...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28090457/glucose-6-phosphate-dehydrogenase-deficiency-does-not-increase-the-susceptibility-of-sperm-to-oxidative-stress-induced-by-h2o2
#13
Shiva Roshankhah, Zahra Rostami-Far, Farhad Shaveisi-Zadeh, Abolfazl Movafagh, Mitra Bakhtiari, Jila Shaveisi-Zadeh
OBJECTIVE: Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most common human enzyme defect. G6PD plays a key role in the pentose phosphate pathway, which is a major source of nicotinamide adenine dinucleotide phosphate (NADPH). NADPH provides the reducing equivalents for oxidation-reduction reductions involved in protecting against the toxicity of reactive oxygen species such as H2O2. We hypothesized that G6PD deficiency may reduce the amount of NADPH in sperms, thereby inhibiting the detoxification of H2O2, which could potentially affect their motility and viability, resulting in an increased susceptibility to infertility...
December 2016: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28089603/melatonin-inhibits-snake-venom-and-antivenom-induced-oxidative-stress-and-augments-treatment-efficacy
#14
Rachana D Sharma, Gajanan D Katkar, Mahalingam S Sundaram, Basavarajaiah Swethakumar, Kesturu S Girish, Kempaiah Kemparaju
Snakebite is a neglected health hazard, its patho-physiology had been focused on systemic and local toxicities; but, venom and antivenom induced oxidative stress has been ignored for a long time. Antivenom therapy although neutralizes venom lethality and saves many lives it remains ineffective against oxidative stress. This prompted us to complement antivenom with an antioxidant molecule melatonin that would protect against oxidative stress and increase the efficacy of the existing snakebite therapy. Here we show that D...
January 12, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28089588/discovery-of-a-novel-series-of-n-hydroxypyridone-derivatives-protecting-astrocytes-against-hydrogen-peroxide-induced-toxicity-via-improved-mitochondrial-functionality
#15
Sarbjit Singh, Ja-Il Goo, Hyojin Noh, Sung Jae Lee, Myoung Woo Kim, Hyejun Park, Hitesh B Jalani, Kyeong Lee, Chunsook Kim, Won-Ki Kim, Chung Ju, Yongseok Choi
Astrocytes play a key role in brain homeostasis, protecting neurons against neurotoxic stimuli such as oxidative stress. Therefore, the neuroprotective therapeutics that enhance astrocytic functionality has been regarded as a promising strategy to reduce brain damage. We previously reported that ciclopirox, a well-known antifungal N-hydroxypyridone compound, protects astrocytes from oxidative stress by enhancing mitochondrial function. Using the N-hydroxypyridone scaffold, we have synthesized a series of cytoprotective derivatives...
January 3, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28089211/toxicity-effects-of-an-environmental-realistic-herbicide-mixture-on-the-seagrass-zostera-noltei
#16
Noël J Diepens, Evelyne Buffan-Dubau, Hélène Budzinski, Jean Kallerhoff, Georges Merlina, Jérome Silvestre, Isabelle Auby, Nathalie Tapie, Arnaud Elger
Worldwide seagrass declines have been observed due to multiple stressors. One of them is the mixture of pesticides used in intensive agriculture and boat antifouling paints in coastal areas. Effects of mixture toxicity are complex and poorly understood. However, consideration of mixture toxicity is more realistic and ecologically relevant for environmental risk assessment (ERA). The first aim of this study was to determine short-term effects of realistic herbicide mixture exposure on physiological endpoints of Zostera noltei...
January 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28089078/hucmsc-exosome-derived-gpx1-is-required-for-the-recovery-of-hepatic-oxidant-injury
#17
Yongmin Yan, Wenqian Jiang, Youwen Tan, Shengqiang Zou, Hongguang Zhang, Fei Mao, Aihua Gong, Hui Qian, Wenrong Xu
Exosomes are small biological membrane vesicles secreted by various cells, including mesenchymal stem cells (MSCs). We previously reported that MSC-derived exosomes (MSC-Ex) can elicit hepatoprotective effects against toxicant-induced injury. However, the success of MSC-Ex-based therapy for treatment of liver diseases and the underlying mechanisms have not been well characterized. We used human umbilical cord MSC-derived exosome (hucMSC-Ex) administrated by tail vein or oral gavage at different doses and, in engrafted liver mouse models, noted antioxidant and anti-apoptotic effects and rescue from liver failure...
January 6, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28088849/effect-of-gallium-exposure-in-arabidopsis-thaliana-is-similar-to-aluminum-stress
#18
Hsin-Fang Chang, Shan-Li Wang, Kuo-Chen Yeh
Although gallium (Ga) is a rare element, it is widely used in semiconductor devices. Ga contamination of the environment has been found in semiconductor-producing countries. Here, the physiological and molecular impacts of Ga in the model plant Arabidopsis thaliana were investigated in medium culture. The primary symptom of Ga toxicity is inhibition of root growth. The increased production of malondialdehyde (MDA) suggests that Ga stress could cause oxidative damage in plants. Roots were the main Ga accumulating sites...
January 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28088731/biological-properties-of-citral-and-its-potential-protective-effects-against-cytotoxicity-caused-by-aspirin-in-the-iec-6-cells
#19
Hafsia Bouzenna, Najla Hfaiedh, Marie-Agnès Giroux-Metges, Abdelfattah Elfeki, Hélène Talarmin
Citral, 3,7-dimethyl-2,6-octadienal, is a key component of several essential oils extracted from lemon-scented herbal plants. The present study was designed to investigate the antioxidant activities of citral and assess its possible protective effects against aspirin-induced toxicity in vitro. We used IEC-6 cells (rat small intestine epithelial cells). The antioxidant activities were determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH), β-carotene/linoleic acid and Ferric reducing antioxidant power (FRAP). Cytotoxicity was evaluated by cell viability, anti-oxidant enzyme activities, malondialdehyde (MDA) production and by the expression of MAPKs (Mitogen-Activated Protein Kinases) pathways...
January 12, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28088643/molecular-mechanisms-of-bio-catalysis-of-heme-extraction-from-hemoglobin
#20
Serzhan Sakipov, Olga Rafikova, Maria G Kurnikova, Ruslan Rafikov
Red blood cell hemolysis in sickle cell disease (SCD) releases free hemoglobin. Extracellular hemoglobin and its degradation products, free heme and iron, are highly toxic due to oxidative stress induction and decrease in nitric oxide availability. We propose an approach that helps to eliminate extracellular hemoglobin toxicity in SCD by employing a bacterial protein system that evolved to extract heme from extracellular hemoglobin. NEAr heme Transporter (NEAT) domains from iron-regulated surface determinant proteins from Staphylococcus aureus specifically bind free heme as well as facilitate its extraction from hemoglobin...
January 7, 2017: Redox Biology
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