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Environmental Toxicology and Pharmacology

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https://www.readbyqxmd.com/read/28103518/adsorption-of-quinolone-tetracycline-and-penicillin-antibiotics-from-aqueous-solution-using-activated-carbons-review
#1
REVIEW
Muthanna J Ahmed
Antibiotics, an important type of pharmaceutical pollutant, have attracted many researchers to the study of their removal from aqueous solutions. Activated carbon (AC) has been widely used as highly effective adsorbent for antibiotics because of its large specific surface area, high porosity, and favorable pore size distribution. In this article, the adsorption performance of AC towards three major types of antibiotics such as tetracyclines, quinolones, and penicillins were reviewed. According to collected data, maximum adsorption capacities of 1340...
January 16, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28081472/endoplasmic-reticulum-stress-and-apoptosis-via-perk-eif2%C3%AE-chop-signaling-in-the-methamphetamine-induced-chronic-pulmonary-injury
#2
Yu-Han Gu, Yun Wang, Yang Bai, Ming Liu, Huai-Liang Wang
Methamphetamine (MA) leads to multiple organs lesions and apoptosis. The aim of this study is to investigate if endoplasmic reticulum stress (ERS) - initiated apoptosis is involved in the chronic pulmonary injury induced by MA. In this study, rats were divided into a control group, methamphetamine 5mg/kg group and methamphetamine 10mg/kg group. This study found that the protein level of GRP78 is higher in M10 group than in control group. PERK signaling and the relevant apoptosis factors were also activated...
January 3, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28073091/the-effect-of-platycodin-d-on-the-expression-of-cytoadherence-proteins-p1-and-p30-in-mycoplasma-pneumoniae-models
#3
Yan-Li Meng, Wei-Ming Wang, Dan-Dan Lv, Qiu-Xia An, Wei-Hong Lu, Xin Wang, Guixin Tang
Platycodin D is one of the most important monomers of the Qinbaiqingfei pellet (Qinbai), which has already been approved as the first effective new Traditional Chinese Medicine used to fight against Mycoplasma pneumoniae (M. pneumoniae) in clinic in China. In previous studies, pharmacodynamics experiment has proved that Platycodin D has anti-M. pneumoniae effect and the minimum inhibitory concentration (MIC) is 16mμg/ml. This paper further clarified that the mechanism underlying the anti-M. pneumoniae effect of Platycodin D might be due to M...
January 3, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28068585/effects-of-phosphate-binders-on-the-gastrointestinal-absorption-of-arsenate-and-of-an-sglt2-inhibitor-drug-on-the-urinary-excretion-of-arsenite-in-mice
#4
Miklós Poór, Balázs Németi, Zoltán Gregus
Arsenate (As(V)) and arsenite (As(III)) are typical sources of acute and chronic arsenic poisoning. Therefore, reducing inner exposure to these arsenicals is a rational objective. Because As(V) mimics phosphate, phosphate binder drugs may decrease the intestinal As(V) absorption. Indeed, lanthanum and aluminium salts and sevelamer removed As(V) from solution in vitro, especially at acidic pH. In mice gavaged with As(V), lanthanum chloride, lanthanum carbonate and aluminium hydroxide given orally also lowered the urinary excretion and tissue levels of As(V) and its metabolites, indicating that they decreased the gastrointestinal As(V) absorption...
January 3, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28088675/involvement-of-water-channel-aquaporin-5-in-h2s-induced-pulmonary-edema
#5
Chunyang Xu, Lei Jiang, Yuxia Zou, Jingjing Xing, Hao Sun, Baoli Zhu, Hengdong Zhang, Jun Wang, Jinsong Zhang
Acute exposure to hydrogen sulfide (H2S) poses a significant threat to life, and the lung is one of the primary target organs of H2S. However, the mechanisms involved in H2S-induced acute pulmonary edema are poorly understood. This study aims to investigate the effects of H2S on the expression of water channel aquaporin 5 (AQP5) and to elucidate the signaling pathways involved in AQP5 regulation. In an in vivo study, C57BL6 mice were exposed to sub-lethal concentrations of inhaled H2S, and histological injury of the lungs and ultrastructure injury of the epithelial cells were evaluated...
December 30, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28064136/impact-of-probable-interaction-of-low-temperature-and-ambient-fine-particulate-matter-on-the-function-of-rats-alveolar-macrophages
#6
Bin Luo, Jiangtao Liu, Gaoqiang Fei, Ting Han, Kai Zhang, Lina Wang, Hongxia Shi, Li Zhang, Ye Ruan, Jingping Niu
The present study aimed to explore the probable interaction of low temperature and ambient fine particulate matter (PM2.5) on rat alveolar macrophages (AMs). AMs were separated from rat BALF and exposed to PM2.5 (0, 25, 50, 100μg/ml) under different temperature (18, 24, 30, 37°C) for 8h. Results indicated that viability and phagocytosis function of AMs decreased with the decline of temperature and the rise of PM2.5 dose, and the strongest toxicity was shown in the highest PM2.5 (100μg/ml) exposure group at 18°C...
December 28, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28049100/dietary-overload-lithium-decreases-the-adipogenesis-in-abdominal-adipose-tissue-of-broiler-chickens
#7
Shiping Bai, Shuqin Pan, Keying Zhang, Xuemei Ding, Jianping Wang, Qiufeng Zeng, Yue Xuan, Zuowei Su
To investigate the toxic effects of dietary overload lithium on the adipogenesis in adipose tissue of chicken and the role of hypothalamic neuropeptide Y (NPY) in this process, one-day-old male chicks were fed with the basal diet added with 0 (control) or 100mg lithium/kg diet from lithium chloride (overload lithium) for 35days. Abdominal adipose tissue and hypothalamus were collected at day 6, 14, and 35. As a percentage of body weight, abdominal fat decreased (p<0.001) at day 6, 14, and 35, and feed intake and body weight gain decreased during day 7-14, and day 15-35 in overload lithium treated broilers as compared to control...
December 26, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28049099/the-effect-of-glyphosate-based-herbicide-roundup-and-its-co-formulant-poea-on-the-motoric-activity-of-rat-intestine-in-vitro-study
#8
Magdalena Chłopecka, Marta Mendel, Natalia Dziekan, Wojciech Karlik
The study was aimed at evaluating the effect of Roundup, polyoxyethylene tallow amine (POEA) and mixture of glyphosate and POEA in different levels on the motoric activity of jejunum strips. The incubation in the Roundup solutions caused a significant, mostly miorelaxant, reversible reaction of smooth muscle; only in the highest tested dose which is equivalent to the agricultural concentration (1% corresponding to 1.7g glyphosate/L) there was an irreversible disturbance of the spontaneous contractility and reactivity...
December 26, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27988355/agmatine-modulates-melanogenesis-via-mitf-signaling-pathway
#9
Eun-Jeong Kwon, Moon-Moo Kim
Agmatine contained in soybean is also found in Manaca, an anti-aging plant, inhabited in Amazon and induces vasodilation by the promotion of NO synthesis in blood vessel. However, the research of agmatine on melanin synthesis related to hair greying is lacking. The aim of this study was to investigate the melanogenic effect of agmatine via regulation of MITF signaling pathway in B16F1 cells. It was determined whether agmatine regulates melanin synthesis at cellular level in addition to the effect of agmatine on mushroom tyrosinase in vitro in the presence of different concentrations of agmatine...
December 13, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27987403/the-effect-of-ethephon-on-immune-system-in-male-offspring-of-mice
#10
Siqi Wang, Haifeng Jin, Qiuqiong Tang, Jun Fu, Zeming Ren, Cike Peng, Lanqin Shang, Weidong Hao, Xuetao Wei
Ethephon can liberate ethylene which could interfere the plant growth process. The aim of the present study was to determine the effect of ethephon on developing immune system of male offspring. Ethephon could enhance NK cell activity in male mice. For 4-week-old male mice, lymphocytes of peripheral blood increased while the hemolytic plaque number decreased. Delayed type hypersensitivity(DTH) was inhibited in all groups. The expression of protein Bcl11b and p-p38 in thymus of treatment groups were lower than control group...
December 12, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27984779/oxidative-stress-endocrine-disruption-and-malformation-of-bufo-gargarizans-embryo-exposed-to-sub-lethal-cadmium-concentrations
#11
Chao Wu, Yuhui Zhang, Lihong Chai, Hongyuan Wang
Thyroid hormone (TH) is critical for vertebrate postembryonic development as well as embryonic development. Chinese toad (Bufo gargarizans) embryos were exposed to different concentrations of cadmium (5, 50, 100, 200 and 500μg Cd L(-1)) for 7days. Malformations were monitored daily, and growth and development of embryos were measured at day 4 and 7, and type 2 and 3 iodothyronine deiodinase (Dio2 and Dio3), thyroid hormone receptors (TRα and TRβ) mRNA levels were also measured to assess disruption of TH synthesis...
December 12, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27984778/oral-administration-of-nano-titanium-dioxide-particle-disrupts-hepatic-metabolic-functions-in-a-mouse-model
#12
Julin Yang, Min Luo, Zhen Tan, Manyun Dai, Minzhu Xie, Jiao Lin, Huiying Hua, Qing Ma, Jinshun Zhao, Aiming Liu
TiO2 nano-particle (TiO2 NP) is widely used in industrial, household necessities, as well as medicinal products. However, the effect of TiO2 NP on liver metabolic function has not been reported. In this study, after mice were orally administered TiO2 NP (21nm) for 14days, the serum and liver tissues were assayed by biochemical analysis, real time quantitative polymerase chain reaction, western blot and transmission electron microscopy. The serum bilirubin was increased in a dose dependent manner. Deposition of TiO2 NP in hepatocytes and the abnormality of microstructures was observed...
December 11, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27984777/concurrent-administration-of-diethylhexyl-phthalate-reduces-the-threshold-dose-at-which-bisphenol-a-disrupts-blastocyst-implantation-and-cadherins-in-mice
#13
Evan D Borman, Warren G Foster, Denys deCatanzaro
Many people are repeatedly exposed to both bisphenol A (BPA) and diethylhexyl phthalate (DEHP), but there has been little research concerning their effects in combination. Both can disrupt blastocyst implantation in inseminated females, albeit at high doses. We exposed mice on gestation days (GD) 1-4 to combinations of BPA and DEHP in doses below the threshold necessary to disrupt implantation on their own. On GD 6, there were fewer normally-developed implantation sites and more underdeveloped implantation sites in females given the combined subthreshold doses...
December 9, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27960113/tebufenozide-induces-g1-s-cell-cycle-arrest-and-apoptosis-in-human-cells
#14
Wenping Xu, Bo Wang, Mingjun Yang, Yang Zhang, Zhiping Xu, Yun Yang, Haijing Cao, Liming Tao
Tebufenozide is a non-steroidal insect growth regulator and is extensively used to control pests, although it is considered to be safe for mammals and environmentally friendly. However, previous studies have found that tebufenozide is cytotoxic to man, although the exact mechanism remains elusive. This study will investigate the apoptotic molecular mechanisms which result from tebufenozide-induced DNA damage in HeLa cells. Our results demonstrate that tebufenozide could trigger arrest in G1/S phase related to a downregulation of cyclin E and cyclin-dependent kinase (CDK) 2 protein...
December 8, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27951409/the-contribution-of-keratinocytes-in-capecitabine-stimulated-hand-foot-syndrome
#15
Min Chen, Jian Chen, Xueming Peng, Zhifei Xu, Jinjin Shao, Yuanrun Zhu, Guanqun Li, Hong Zhu, Bo Yang, Peihua Luo, Qiaojun He
Capecitabine, as the first-line treatment for multiple tumor types, has a serious drawback of hand-foot-syndrome (HFS) that limits its clinical use. However, the pathophysiology and mechanism of capecitabine-induced HFS is rarely known. Here we built the experimental mouse model of HFS induced by capecitabine at first and it was shown that 3 of 6 mice appeared HFS in the 5th day and 5 mice occurred HFS in the 30th day. The corneous layer was reduced in capecitabine-induced HFS in vivo. Moreover, we found that capecitabine could significantly induce keratinocytes cells death in vitro through activated apoptosis pathway and decreased mitochondrial membrane potential...
December 5, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27992806/environment-friendly-approach-for-size-controllable-synthesis-of-biocompatible-silver-nanoparticles-using-diastase
#16
Sireesh Babu Maddinedi, Badal Kumar Mandal, Kiran Kumar Anna
A green, facile method for the size selective synthesis of silver nanoparticles (AgNPs) using diastase as green reducing and stabilizing agent is reported. The thiol groups present in the diastase are mainly responsible for the rapid reaction rate of silver nanoparticles synthesis. The variation in the size and morphology of AgNPs were studied by changing the pH of diastase. The prepared silver nanoparticles were characterized by using UV-vis, XRD, FTIR, TEM and SAED. The FTIR analysis revealed the stabilization of diastase molecules on the surface of AgNPs...
November 30, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28013143/bendiocarb-induced-histopathological-and-biochemical-alterations-in-rat-liver-and-preventive-role-of-vitamins-c-and-e
#17
Fatma Gökçe Apaydin, Hatice Baş, Suna Kalender, Yusuf Kalender
In this study, biochemical changes and histological structure of rat liver after bendiocarb administration and possible preventive effects of vitamins C and E were studied. The animals were given with bendiocarb, vitamin C and vitamin E, daily 0,8mg/kg of body weight (bw), 100mg/kg-bw and 100mg/kg-bw for 28days, respectively. Lipid peroxidation, antioxidant enzyme activities, histological alterations and antioxidant capacity assays of liver and also liver function tests and lipid profile were measured. Bendiocarb treatment decreased the antioxidant enzyme activities, FRAP and TEAC values and increased malondialdehyde levels compared to control...
November 27, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27992807/cellular-stress-and-histopathological-tools-used-as-biomarkers-in-oreochromis-mossambicus-for-assessing-metal-contamination
#18
Neeraj Kumar, K K Krishnani, S K Gupta, N P Singh
In the present study, we have analyzed various biochemical and histopathological biomarkers in the Oreochromis mossambicus collected from 18 sites at Bhima River. The biochemical biomarkers viz. antioxidative enzymes in muscle viz. catalase, SOD, and GST, glycolytic enzymes in kidney viz. LDH and MDH, protein metabolic enzymes in liver, gill, brain, gonad and muscle viz. ALT and AST, neurotransmitter enzymes in muscle AChE, lipid peroxidation and histopathology in the liver and gill have been evaluated. The oxidative biomarkers, glycolytic enzymes, protein metabolic enzymes and lipid peroxidation were significantly (p<0...
November 24, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27915123/in-vitro-assessment-of-deferoxamine-on-mesenchymal-stromal-cells-from-tumor-and-bone-marrow
#19
Guoping Wang, Guobo Shen, Tao Yin
Deferoxamine (DFO), an iron chelator, is commonly used to remove excess iron from the body. DFO has also been demonstrated to have anti-tumor effect. However, there is no available report on the effect of deferoxamine on mesenchymal stromal cells (MSCs). In this study, we first isolated tumor-associated MSCs (TAMSCs) from EG-7 tumors, which were positive for CD29, CD44, CD73, CD90 and CD105. Ex vivo cultured stem cells derived from tumor and bone marrow compartment were exposed to DFO. We demonstrated that DFO had growth-arresting and apoptosis-inducing effect on TAMSCs and bone marrow MSCs (BMMSCs)...
November 23, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27902959/kaempferol-a-phytoestrogen-suppressed-triclosan-induced-epithelial-mesenchymal-transition-and-metastatic-related-behaviors-of-mcf-7-breast-cancer-cells
#20
Geum-A Lee, Kyung-Chul Choi, Kyung-A Hwang
As a phytoestrogen, kaempferol is known to play a chemopreventive role inhibiting carcinogenesis and cancer progression. In this study, the influences of triclosan, an anti-bacterial agent recently known for an endocrine disrupting chemical (EDC), and kaempferol on breast cancer progression were examined by measuring their effects on epithelial-mesenchymal transition (EMT) and metastatic-related behaviors of MCF-7 breast cancer cells. Morphological changes of MCF-7 cells were observed, and a wound-healing assay was performed after the treatment of triclosan and kaempferol...
November 22, 2016: Environmental Toxicology and Pharmacology
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