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Environmental Toxicology and Pharmacology

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https://www.readbyqxmd.com/read/28728133/zebrafish-have-an-ethanol-inducible-hepatic-4-nitrophenol-hydroxylase-that-is-not-cyp2e1-like
#1
Jessica H Hartman, Jordan S Kozal, Richard T Di Giulio, Joel N Meyer
Zebrafish are an attractive model organism for toxicology; however, an important consideration in translating between species is xenobiotic metabolism/bioactivation. CYP2E1 metabolizes small hydrophobic molecules, e.g. ethanol, cigarette smoke, and diesel exhaust components. CYP2E1 is thought to only be conserved in mammals, but recent reports identified homologous zebrafish cytochrome P450s. Herein, ex vivo biochemical measurements show that unlike mammals, zebrafish possess a low-affinity 4-nitrophenol hydroxylase (Km ∼0...
July 10, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28710931/ligustrazine-modulates-renal-cysteine-biosynthesis-in-rats-exposed-to-cadmium
#2
Wenhua Kuang, Xu Zhang, Wufu Zhu, Zhou Lan
The objective of this study was to determine the effect of ligustrazine (TMP) on cadmium (Cd)-induced nephrotoxicity and its relevant mechanism. TMP (50mg/kg) was injected intraperitoneally (i.p.) into rats 1h prior to CdCl2 exposure (at a Cd dose of 0.6mg/kg). TMP reversed Cd-induced nephrotoxicity, evidenced by the relatively normal architecture of the renal cortex. Additionally, TMP alleviated renal oxidative stress of rats that were exposed to Cd, evidenced by the decreased levels of malondialdehyde (MDA), 4-hydroxynonenal (4-HNE), elevated levels of glutathione (GSH) and GSH/GSSG (glutathione disulfide) ratios...
July 9, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28704756/protective-role-of-dietary-spirulina-platensis-against-diazinon-induced-oxidative-damage-in-nile-tilapia-oreochromis-niloticus
#3
Nevien K M Abdelkhalek, Ismail A M Eissa, Eman Ahmed, Omnia E Kilany, Mohamed El-Adl, Mahmoud A O Dawood, Ahmed M Hassan, Mohamed M Abdel-Daim
The current study was performed to investigate the ameliorating effect of dietary supplementation of 0.5 and 1% Spiurolina platensis (SP) diet against the sub-acute toxicity of diazinon (DZN) 0.28mg/L in Nile tilapia. At the end of experiment after 28days, hepatic and renal damage markers (aspartate transaminase, alanine transaminase, alkaline phosphatase, urea, uric acid and creatinine), serum biochemical parameters (total proteins, albumin, cholesterol and glucose) and tissue antioxidant status (superoxide dismutase, catalase, glutathione peroxidase, reduced glutathione and malondialdehyde) were detesrmined...
July 5, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28704753/resveratrol-improves-prostate-fibrosis-during-progression-of-urinary-dysfunction-in-chronic-prostatitis
#4
Yi He, Hui-Zhi Zeng, Yang Yu, Jia-Shu Zhang, Xingping Duan, Xiao-Na Zeng, Feng-Tao Gong, Qi Liu, Bo Yang
AIM: We investigated whether prostate fibrosis was associated with urinary dysfunction in chronic prostatitis (CP) and whether resveratrol improved urinary dysfunction and the underlying molecular mechanism. METHODS: Rat model of CP was established via subcutaneous injections of DPT vaccine and subsequently treated with resveratrol. Bladder pressure and volume tests investigated the effect of resveratrol on urinary dysfunction in CP rats. Western blotting and immunohistochemical staining examined the expression level of C-kit/SCF and TGF-β/Wnt/β-catenin...
July 1, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28704751/protective-effect-of-ferulic-acid-on-cisplatin-induced-nephrotoxicity-in-rats
#5
Erliasa Bami, Ozlem Bingol Ozakpınar, Zarife Nigar Ozdemir-Kumral, Kutay Köroglu, Feriha Ercan, Zeynep Cirakli, Turgut Sekerler, Fikret Vehbi Izzettin, Mesut Sancar, Betul Okuyan
This study aims to determine the potential protective effects of ferulic acid against cisplatin-induced nephrotoxicity and to compare its effect with curcumin, a well-known protective agent against cisplatin- induced toxicity in rats. Administration of cisplatin resulted in high BUN (Blood Urea Nitrogen), creatinine, MDA (Malondialdehyde), MPO (Myeloperoxidase), TOS (Total Oxidative Status), PtNT (Protein Nitrotyrosine) levels (p<0.05). Histological observations showed abnormal morphology of kidney; in addition with appearance of TUNEL positive cells indicating apoptosis in cisplatin administered group...
July 1, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28697452/effect-of-fluoride-exposure-on-mrna-expression-of-cav1-2-and-calcium-signal-pathway-apoptosis-regulators-in-pc12-cells
#6
Qiuxia Liao, Rui Zhang, Xiaoyu Wang, Weiwei Nian, Lulu Ke, Wei Ouyang, Zigui Zhang
This study investigated the effects of fluoride exposure on the mRNA expression of Cav1.2 calcium signaling pathway and apoptosis regulatory molecules in PC12 cells. The viability of PC12 cell receiving high fluoride (5.0mM) and low fluoride (0.5mM) alone or fluoride combined with L-type calcium channel (LTCC) agonist/inhibitor (5umol/L FPL6417/2umol/L nifedipine) was detected using cell counting kit-8 at different time points (2, 4, 6, 8, 12, 10, and 24h). Changes in the cell configuration were observed after exposing the cells to fluoride for 24h...
June 30, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28728132/melatonin-protect-the-development-of-preimplantation-mouse-embryos-from-sodium-fluoride-induced-oxidative-injury
#7
Jiamin Zhao, Beibei Fu, Wei Peng, Tingchao Mao, Haibo Wu, Yong Zhang
Recently study shows that melatonin can protect embryos from the culture environment oxidative stress. However, the protective effect of melatonin on the mouse development of preimplantation embryos under sodium fluoride (NaF) induced oxidative stress is still unclear. Here, we showed that exposure to NaF significantly increased the reactive oxygen species (ROS) level, decreased the blastocyst formation rates, and increased the fragmentation, apoptosis and retardation of blastocysts in the development of mouse preimplantation embryos...
June 29, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28704755/oral-warfarin-intake-affects-skin-inflammatory-cytokine-responses-in-rats
#8
Aleksandra Popov Aleksandrov, Ivana Mirkov, Lidija Zolotarevski, Marina Ninkov, Dina Mileusnic, Dragan Kataranovski, Milena Kataranovski
Warfarin is an anticoagulant used in prevention/prophylaxis of thromboembolism. Besides the effects on coagulation, non-hemorrhagic reactions have also been documented. Although cutaneous reactions were reported in some patients, the impact on skin immunity was not explored. In the present paper, the effect of 30-day oral warfarin intake on skin cytokine responses in rats was analyzed. Increased release of inflammatory cytokines (TNF, IL-1β and IL-10) was noted by skin explants from rats which received warfarin, but without effect on IL-6...
June 28, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28704754/metabolomics-study-of-cadmium-induced-diabetic-nephropathy-and-protective-effect-of-caffeic-acid-phenethyl-ester-using-uplc-q-tof-ms-combined-with-pattern-recognition
#9
Pin Gong, Xiangna Chang, Xuefeng Chen, Xiaohuan Bai, He Wen, Sihui Pi, Wenjuan Yang, Lan Wang, Fuxin Chen
Diabetic nephropathy (DN) is the most severe complication of diabetes and multiple factors are involved in the pathogenesis of DN. Among them, cadmium (Cd) acts as a risk factor inducing the occurrence of DN. The present study focused on investigating the protective role of caffeic acid phenethyl ester (CAPE), an active component of propolis from honeybee hives, against Cd-induced DN in mice based on ultra performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS)and pattern recognition...
June 28, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28704752/assessing-human-metal-accumulations-in-an-urban-superfund-site
#10
M Katie Hailer, Christopher P Peck, Michael W Calhoun, Robert F West, Kyle J James, Steven D Siciliano
Butte, Montana is part of the largest superfund site in the continental United States. Open-pit mining continues in close proximity to Butte's urban population. This study seeks to establish baseline metal concentrations in the hair and blood of individuals living in Butte, MT and possible routes of exposure. Volunteers from Butte (n=116) and Bozeman (n=86) were recruited to submit hair and blood samples and asked to complete a lifestyle survey. Elemental analysis of hair and blood samples was performed by ICP-MS...
June 27, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28683350/the-metabolic-effects-of-diuron-in-the-rat-liver
#11
Mellina da Silva Simões, Lívia Bracht, Angela Valderrama Parizotto, Jurandir Fernando Comar, Rosane Marina Peralta, Adelar Bracht
A systematic study on the effects of diuron on the hepatic metabolism was conducted with emphasis on parameters linked to energy metabolism. The experimental system was the isolated perfused rat liver. The results demonstrate that diuron inhibited biosynthesis (gluconeogenesis) and ammonia detoxification, which are dependent of ATP generated within the mitochondria. Conversely, it stimulated glycolysis and fructolysis, which are compensatory phenomena for an inhibited mitochondrial ATP generation. Furthermore, diuron diminished the cellular ATP content under conditions where the mitochondrial respiratory chain was the only source of this compound...
June 27, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28672163/evaluation-of-whole-cigarette-smoke-induced-oxidative-stress-in-a549-and-beas-2b-cells
#12
Shimin Zhang, Xiang Li, Fuwei Xie, Kejian Liu, Huimin Liu, Jianping Xie
Cigarette smoke is a complex and oxidative aerosol. Previous researches on the hazards of cigarette smoke mainly focused on the adverse bioeffects induced by its condensates or gas vapor phase, which ignored the dynamic processes of smoking and the cigarette smoke aging. To overcome these disadvantages, we performed air-liquid interface exposure of whole smoke, which used native and unmodified smoke and ensured the exposure similar to physiological inhalation. Our results indicated that whole cigarette smoke induced lung epithelial cells (A549) and bronchial epithelial cells (BEAS-2B) damages in cytotoxicity assays (methyl thiazoly tetrazolium and neutral red uptake assays)...
June 27, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28672162/interaction-studies-of-polybrominated-diphenyl-ethers-pbdes-with-human-serum-albumin-hsa-molecular-docking-investigations
#13
Songwen Tan, Zhenxing Chi, Ye Shan, Zhengzhong Wen, Weiguo Li
This work has evaluated the interactions of HSA and typical PBDEs (BDE47, BDE99, BDE100, BDE153 and BDE209) at molecular level by modelling. Apart from the BDE209, PBDEs with higher molecular weight show higher binding energy with the residues of HSA. The BDE209 without H atoms has the lowest binding energy (-ΔGbinding: 4.30calmol(-1)) than other PBDEs (-ΔGbinding: 7.93-8.42calmol(-1)). The BDE99 shows a higher binding energy than its isomer (BDE100). On the other hand, the lgKow-depth plotting figure shows that a higher Kow value (hydrophobicity) of PBDEs is accompanied by a deeper binding site within the central channel of HSA...
June 24, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28688303/effect-of-styrene-exposure-on-plasma-parameters-molecular-mechanisms-and-gene-expression-in-rat-model-islet-cells
#14
Kamal Niaz, Fatima Ismail Hassan, Faheem Mabqool, Fazlullah Khan, Saeideh Momtaz, Maryam Baeeri, Mona Navaei-Nigjeh, Mahban Rahimifard, Mohammad Abdollahi
Styrene is an aromatic hydrocarbon compound present in the environment and have primary exposure through plastic industry. The current study was designed to evaluate styrene-induced toxicity parameters in rat plasma fasting blood glucose (FBG) level, oral glucose tolerance, insulin secretion, oxidative stress, and inflammatory cytokines in cellular and molecular levels. Styrene was dissolved in corn oil and administered at different doses (250, 500, 1000, 1500, 2000mg/kg/day and control) to each rat, for 42days...
June 23, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28683349/biosynthesis-of-vitamin-c-stabilized-tin-oxide-nanoparticles-and-their-effect-on-body-weight-loss-in-neonatal-rats
#15
Jie Yang, Ke-Qing Yang, Li Qiu
The green synthesis of tin oxide nanoparticles (SnO2 NPs) using vitamin C (Vc) as a reducing agent via a biosynthetic approach is described. The effect of Vc-stabilized SnO2 NPs on the body weight of neonatal rats is also studied. The prepared SnO2NPs were characterized using spectroscopic and microscopic instrumental techniques including transmission electron microscopy (TEM), UV-visible spectrophotometry (UV-vis), X-ray diffraction and Fourier transform infrared spectroscopy, which confirmed the formation of NPs...
June 20, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28668705/the-research-of-genetic-toxicity-of-%C3%AE-phellandrene
#16
Zhiyuan Cheng, Jianjun Jiang, Xiaohua Yang, Hongqian Chu, Ming Jin, Yuan Li, Xi Tao, Siqi Wang, Yao Huang, Lanqin Shang, Shuang Wu, Weidong Hao, Xuetao Wei
β-Phellandrene, a plant extract, can be used as natural pesticides and synthetic materials. As a factor that human may be exposed to, the toxicity information about β-phellandrene is scared at present. This study focused on the genetic toxicity of β-phellandrene. The genetic toxicity of β-phellandrene was evaluated by micronucleus test, comet assay, Ames test, and chromosomal aberration test. In this study, 2850, 1425, 712.5mg/kg β-phellandrene were used in vivo experiments (comet assay and micronucleus test)...
June 20, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28668704/effects-of-1-4-naphthoquinone-aged-carbon-black-particles-on-the-cell-membrane-of-human-bronchial-epithelium
#17
Yongming Zhang, Li Wang, Huimin Feng, Guiping Hu, Lele Wang, Jiaxing Liu, Xin Gao, Jing Shang, Tong Zhu, Shichuan Tang, Guang Jia
Black carbon (BC) and polycyclic aromatic hydrocarbons (PAHs), which are major atmospheric pollutants in China, are hazardous to humans following inhalation. BC can be oxidized by PAHs forming secondary particles of which the health effects are unknown. In this study, carbon black (CB) was used to simulate BC to reveal the adverse effects of 1,4-naphthoquinone aged carbon black (CB/1,4-NQ) particles on the membrane of human bronchial epithelial (16HBE) cells. It was showed that, the cell viability, cell membrane fluidity, membrane potential and mitochondrial membrane potential were significantly decreased after 16HBE cells were treated with CB, 1,4-NQ or CB/1,4-NQ...
June 20, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28668703/dna-damage-and-repair-oxidative-stress-and-metabolism-biomarker-responses-in-lungs-of-rats-exposed-to-ambient-atmospheric-1-nitropyrene
#18
Ruijin Li, Lifang Zhao, Li Zhang, Minghui Chen, Chuan Dong, Zongwei Cai
1-Nitropyrene (1-NP) is a mutagenic and carcinogenic pollutant very widespread in the environment. However, the relative investigations on genotoxicity, oxidative stress and metabolic enzymes in lungs of mammalian caused by 1-NP have not been fully established. In this study, the 1-NP solutions at 3 dosages (1.0×10(-5), 4.0×10(-5) and 1.6×10(-4)mg/kg body weight) were respectively given to rats by the intratracheal instillation. The responses of 1-NP on DNA damage and repair, oxidative stress and metabolism biomarkers in rat lungs after exposure to 1-NP were measured...
June 20, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28667861/cyanidin-3-rutinoside-increases-glucose-uptake-by-activating-the-pi3k-akt-pathway-in-3t3-l1-adipocytes
#19
Kyung Ha Choi, Hyun Ah Lee, Mi Hwa Park, Ji-Sook Han
In this study, the effect of cyanidin-3-rutinoside (C3R) on glucose uptake by 3T3-L1 adipocytes was studied. C3R significantly increased glucose uptake, which was associated with enhanced plasma membrane glucose transporter type 4 (PM-GLUT4) expression in 3T3-L1 adipocytes. The potentiating effect of C3R on glucose uptake and PM-GLUT4 expression was related to enhanced phosphorylation of insulin receptor substrate 1 (IRS-1) and Akt, as well as augmented activation of phosphatidylinositol-3-kinase (PI3K) in the insulin signaling pathway...
June 20, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28667862/icariin-exerts-inhibitory-effects-on-the-growth-and-metastasis-of-kyse70-human-esophageal-carcinoma-cells-via-pi3k-akt-and-stat3-pathways
#20
Zhen-Fang Gu, Zi-Teng Zhang, Jun-Ye Wang, Bao-Bin Xu
Esophageal cancer is one of the leading causes of cancer related mortality across the globe. The current treatment options are insufficient and are associated with number of side effects. Therefore there is a pressing need to develop effective and more efficient strategies for the treatment of esophageal cancer. Consistently, natural products are considered potential candidates for develop of cancer chemotherapy. Icariin is a naturally occurring flavonol glucoside and has been reported to possess tremendous pharmacological potential ranging from neuroprotection to anticancer activity...
June 19, 2017: Environmental Toxicology and Pharmacology
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