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https://www.readbyqxmd.com/read/28092839/effect-and-mechanism-of-sorbus-pohuashanensis-hante-hedl-flavonoids-protect-against-arsenic-trioxide-induced-cardiotoxicity
#1
Xiaojin Yu, Zhenyu Wang, Zunpeng Shu, Zhengqing Li, Yuan Ning, Keli Yun, Haina Bai, Ruihai Liu, Wenli Liu
The cardiotoxicity of arsenic trioxide (ATO) limits its clinical application in cancer treatment. Evidences suggest that sorbus has antioxidant activity and its consumption has been linked with improved cardioprotection. In this study, we investigated the cardio-protective effect and mechanisms of Sorbus pohuashanensis (Hante) Hedl. flavonoids (SPF) against ATO in BALB/c mice and H9c2 cells. Eleven major flavonoids were confirmed by ultra-performance liquid chromatography electrospray ionization quadrupole time of flight mass spectrometry (UPLC-ESI-Q-TOF-MS)...
January 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28073323/protective-effect-exerted-by-soil-phosphorus-on-soybean-subjected-to-arsenic-and-fluoride
#2
Carolina Bustingorri, Guillermo Noriega, Raúl S Lavado, Karina Balestrasse
: Objetive: Arsenic (As) and fluoride (F) are found in groundwater and soils around the world, causing different problems to crops. Because these elements compete against phosphorus (P) in soils and plants, their relationship is complex. The aim of this work was to study the oxidative stress of soybean plants subjected to different concentrations of As and F, and the effect of P. METHODS: The following 10 treatments were carried out in each of two soils with different P content: three As levels (low 10 mg As kg(-1), medium 50 mg As kg(-1) and high 100 mg As kg(-1)), three F levels (low 160 mg F kg(-1), medium 250 mg F kg(-1) and high 500 mg F kg(-1)) and three As + F levels (same concentrations), and the control treatment (soil with the background As and F concentrations) Lipid peroxidation, chlorophyll, gluthatione contents and antioxidant enzymes activities were determination...
January 10, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28061413/a-significant-positive-correlation-between-endogenous-trans-zeatin-content-and-total-arsenic-in-arsenic-hyperaccumulator-pteris-cretica-var-nervosa
#3
Xuemei Zhang, Xiaoyan Yang, Hongbin Wang, Qinchun Li, Haijuan Wang, Yanyan Li
A pot experiment was conducted to compare the content of endogenous trans-zeatin (Z), plant arsenic (As) uptake and physiological indices in the fronds of As-hyperaccumulator (Pteris cretica var. nervosa) and non-hyperaccumulator (Pteris ensiformis). Furthermore, a stepwise regression method was used to study the relationship among determined indices, and the time-course effect of main indices was also investigated under 100mg/kg As stress with time extension. In the 100-200mg/kg As treatments, plant height showed no significant difference and endogenous Z content significantly increased in P...
January 3, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28049059/arsenic-induced-genotoxic-responses-and-their-amelioration-by-diphenylene-iodonium-24-epibrassinolide-and-proline-in-glycine-max-l
#4
Vibhuti Chandrakar, Bhumika Yadu, Rakesh Kumar Meena, Amit Dubey, S Keshavkant
Presence of the toxic metalloid, "arsenic (As)" is ubiquitous in the environment especially in the soil and water. Its excess availability in the soil retards growth and metabolism of plants via (a) slowing down the cell division/elongation, (b) overproduction of reactive oxygen species (ROS), (c) modulation of antioxidant enzymes, and (d) alteration of DNA profile/genomic template stability (GTS). In the current study, diphenylene iodonium (DPI), 24-epibrassinolide (EBL) and proline (Pro) were used to analyze their roles in eliminating the adverse effects of As...
December 26, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28043702/understanding-arsenic-dynamics-in-agronomic-systems-to-predict-and-prevent-uptake-by-crop-plants
#5
Tracy Punshon, Brian P Jackson, Andrew A Meharg, Todd Warczack, Kirk Scheckel, Mary Lou Guerinot
This review is on arsenic in agronomic systems, and covers processes that influence the entry of arsenic into the human food supply. The scope is from sources of arsenic (natural and anthropogenic) in soils, biogeochemical and rhizosphere processes that control arsenic speciation and availability, through to mechanisms of uptake by crop plants and potential mitigation strategies. This review makes a case for taking steps to prevent or limit crop uptake of arsenic, wherever possible, and to work toward a long-term solution to the presence of arsenic in agronomic systems...
December 30, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28032134/arsenic-speciation-in-organisms-from-two-large-shallow-freshwater-lakes-in-china
#6
Fen Yang, Nan Zhang, Chaoyang Wei, Jinxin Liu, Shaowen Xie
This study measured the elemental and species concentrations of arsenic (As) in the water, sediments and food webs of two shallow Chinese freshwater lakes. Organic As species were widely detected in various organisms from the two lakes (60%-100% of the total). Among these organisms, dimethylarsinic acid (DMA) was predominant in most of the samples. The average concentrations and corresponding proportions were 0.59 mg/kg, 81% in fish; 3.24 mg/kg, 70.63% in zoobenthos; and 1.34 mg/kg, 79% in plants. The average concentrations and corresponding proportions of monomethylarsonic acid (MMA) and inorganic As were much lower, ranging from n...
December 28, 2016: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28007183/role-of-complex-organic-arsenicals-in-food-in-aggregate-exposure-to-arsenic
#7
REVIEW
David J Thomas, Karen Bradham
For much of the world's population, food is the major source of exposure to arsenic. Exposure to this non-essential metalloid at relatively low levels may be linked to a wide range of adverse health effects. Thus, evaluating foods as sources of exposure to arsenic is important in assessing risk and developing strategies that protect public health. Although most emphasis has been placed on inorganic arsenic as human carcinogen and toxicant, an array of arsenic-containing species are found in plants and animals used as foods...
November 2016: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28006731/selenite-modulates-the-level-of-phenolics-and-nutrient-element-to-alleviate-the-toxicity-of-arsenite-in-rice-oryza-sativa-l
#8
Reshu Chauhan, Surabhi Awasthi, Preeti Tripathi, Seema Mishra, Sanjay Dwivedi, Abhishek Niranjan, Shekhar Mallick, Pratibha Tripathi, Veena Pande, Rudra Deo Tripathi
Arsenic (As) contamination of paddy rice is a serious threat all over the world particularly in South East Asia. Selenium (Se) plays important role in protection of plants against various abiotic stresses including heavy metals. Moreover, arsenite (AsIII) and selenite (SeIV) can be biologically antagonistic due to similar electronic configuration and sharing the common transporter for their uptake in plant. In the present study, the response of oxidative stress, phenolic compounds and nutrient elements was analyzed to investigate Se mediated As tolerance in rice seedlings during AsIII and SeIV exposure in hydroponics...
December 19, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28006667/alkaline-technosol-contaminated-by-former-mining-activity-and-its-culturable-autochthonous-microbiota
#9
A Šimonovičová, P Ferianc, H Vojtková, D Pangallo, P Hanajík, L Kraková, Z Feketeová, S Čerňanský, L Okenicová, M Žemberyová, M Bujdoš, E Pauditšová
Technosols or technogenic substrates contaminated by potentially toxic elements as a result of iron mining causes not only contamination of the surrounding ecosystem but may also lead to changes of the extent, abundance, structure and activity of soil microbial community. Microbial biomass were significantly inhibited mainly by exceeding limits of potentially toxic metals as arsenic (in the range of 343-511 mg/kg), copper (in the range of 7980-9227 mg/kg), manganese (in the range of 2417-2670 mg/kg), alkaline and strong alkaline pH conditions and minimal contents of organic nutrients...
December 19, 2016: Chemosphere
https://www.readbyqxmd.com/read/28005215/arsenic-a-review-on-exposure-pathways-accumulation-mobility-and-transmission-into-the-human-food-chain
#10
REVIEW
Beste Arslan, Mustafa B A Djamgoz, Ertan Akün
This review deals with exposure pathways of arsenic (As), as well as its transfer and uptake processes from its source to the human body. It is proven fact that uptake of inorganic As for a long period can lead to chronic As poisoning and a variety of adverse health effects such as skin, lung and bladder cancer, in addition to cardiovascular diseases, diabetes and gastrointestinal symptoms. As exposure occurs primarily from consumption of potable water containing high amounts of inorganic As and also from consumption of crops cultivated in As contaminated agricultural fields-either naturally or anthropogenically through contaminated air or pesticides-or irrigated with As containing water...
December 23, 2016: Reviews of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28004369/mycorrhizal-colonization-status-of-lowland-rice-oryza-sativa-l-in-the-southeastern-region-of-china
#11
Xun-Wen Chen, Fu-Yong Wu, Hui Li, Wai-Fung Chan, Sheng-Chun Wu, Ming-Hung Wong
The accumulation, distribution, and speciation of contaminants, such as arsenic, in rice can be affected by soil microorganisms such as arbuscular mycorrhizal fungi (AMF). As a potential measure to control contaminant acquisition in rice, the status and performance of AMF in the field need to be investigated. Root samples of rice plants were collected in seven different cities in Guangdong, Jiangxi, Hubei, and Jiangsu Provinces in China in order to investigate the colonization rate of AMF. The total DNA of the roots was extracted, followed by PCR and sequencing, and further confirmed the existence of AMF...
December 21, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27999217/a-survey-on-lifestyle-and-level-of-biomarkers-of-environmental-exposure-in-residents-in-civitavecchia-italy
#12
Carla Ancona, Lisa Bauleo, Giovanni Biscotti, Beatrice Bocca, Stefano Caimi, Fabio Cruciani, Sabrina Di Lorenzo, Morena Petrolati, Anna Pino, Giovanna Piras, Augusto Pizzabiocca, Silvia Rabbiosi, Flavia Ruggieri, Chelo Salatino, Alessandro Alimonti, Francesco Forastiere
BACKGROUND: The assessment of individual exposure to toxicants in industrially contaminated areas is difficult when multiple productions are active close to residential areas. Two thermoelectric power plants and a large harbor have been operating since the '60s in the area of Civitavecchia (North of Rome). METHODS: The ABC (Ambiente e Biomonitoraggio nell'area di Civitavecchia, Environment and Biomonitoring in Civitavecchia) program involved, in the period 2013-2014, residents in Civitavecchia and in the nearby municipalities (Santa Marinella, Allumiere, Tolfa and Tarquinia)...
October 2016: Annali Dell'Istituto Superiore di Sanità
https://www.readbyqxmd.com/read/27940117/arsenic-enrichment-enhanced-root-exudates-and-altered-rhizosphere-microbial-communities-and-activities-in-hyperaccumulator-pteris-vittata
#13
Suvendu Das, Mon-Lin Chou, Jiin-Shuh Jean, Huai-Jen Yang, Pil Joo Kim
Phytoremediation of arsenic (As)-contaminated soil by hyperaccumulator Pteris vittata is promising. A better understanding of the rhizosphere microbial dynamics that regulate As availability and plant growth is important to optimize the phytoremediation process. In this study, Illumina sequencing of 16S rRNA genes was applied to assess the rhizosphere microbial community structure of P. vittata. Microbial functionality was monitored by soil enzyme activities and MPN-PCR targeting genes of interest. Arsenic (100mgkg(-1) AsV) addition to soil significantly increased DOC, root exudates, As and P uptake and the frond biomass of P...
March 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27936403/arsenic-accumulation-and-speciation-in-rice-grown-in-arsanilic-acid-elevated-paddy-soil
#14
Anjing Geng, Xu Wang, Lishu Wu, Fuhua Wang, Yan Chen, Hui Yang, Zhan Zhang, Xiaoli Zhao
P-arsanilic acid (AsA) is a emerging but less concerned contaminant used in animal feeding operations, for it can be degraded to more toxic metabolites after being excreted by animals. Rice is the staple food in many parts of the world, and also more efficient in accumulating arsenic (As) compared to other cereals. However, the uptake and transformation of AsA by rice is unclear. This study aimed to evaluate the potential risk of using AsA as a feed additive and using the AsA contaminated animal manure as a fertilizer...
March 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27933331/characterization-of-arsenic-biotransformation-by-a-typical-bryophyte-physcomitrella-patens
#15
Xixiang Yin, Lihong Wang, Yifei Liu, Tenglong Jiang, Jianwei Gao
Arsenic (As) is a ubiquitous environmental toxin that has created catastrophic human health and environmental problems around world. Physcomitrella patens is a potential model plant for the study of environmental monitoring, which exists in all kinds of ecosystems. In this study, arsenic metabolism was investigated by this moss. When supplied with different levels of arsenate (50, 100, 200 µmol/L) for a 4-week period, the total arsenic concentrations were up to 231.4-565.4 mg/kg DW in this moss. Arsenite concentration increased with increasing external arsenate concentrations, the proportion was up to 25...
December 8, 2016: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27933081/the-density-and-length-of-root-hairs-are-enhanced-in-response-to-cadmium-and-arsenic-by-modulating-gene-expressions-involved-in-fate-determination-and-morphogenesis-of-root-hairs-in-arabidopsis
#16
Ramin Bahmani, Dong G Kim, Jin A Kim, Seongbin Hwang
Root hairs are tubular outgrowths that originate from epidermal cells. Exposure of Arabidopsis to cadmium (Cd) and arsenic [arsenite, As(III)] increases root hair density and length. To examine the underlying mechanism, we measured the expression of genes involved in fate determination and morphogenesis of root hairs. Cd and As(III) downregulated TTG1 and GL2 (negative regulators of fate determination) and upregulated GEM (positive regulator), suggesting that root hair fate determination is stimulated by Cd and As(III)...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27932037/determination-of-arsenic-speciation-and-the-possible-source-of-methylated-arsenic-in-panax-notoginseng
#17
Meilin Zhu, Xiancai Zeng, Yanxue Jiang, Xiaoting Fan, Sihong Chao, Hongbin Cao, Wensheng Zhang
Arsenic species and a possible source of methylated arsenic in a Panax Notoginseng (PN) medicinal plant were explored to further understand the change of inorganic arsenic to the less toxic methylated form to minimize the health risks associated with its medicinal use. Arsenic speciation in PN from major planting areas was determined using high-performance liquid chromatography coupled with hydride generator-atomic fluorescence (HPLC-HG-AFS). Pot experiments were performed to explore the source of methylated arsenic in PN, and the arsenite methyltransferase (arsM) gene abundance was determined using quantitative reverse transcription PCR (q-RTPCR)...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27931138/medicinal-plants-and-natural-products-in-amelioration-of-arsenic-toxicity-a-short-review
#18
Sanijb Bhattacharya
CONTEXT: Chronic arsenic toxicity (arsenicosis) is considered a serious public health menace worldwide, as there is no specific, safe, and efficacious therapeutic management of arsenicosis. OBJECTIVES: To collate the studies on medicinal plants and natural products with arsenic toxicity ameliorative effect, active pre-clinically and/or clinically. METHODS: Literature survey was carried out by using Google, Scholar Google and Pub-Med. Only the scientific journal articles found on the internet for last two decades were considered...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/27930927/arsenic-affects-the-production-of-glucosinolate-thiol-and-phytochemical-compounds-a-comparison-of-two-brassica-cultivars
#19
Chandana Pandey, Rehna Augustine, Medha Panthri, Ismat Zia, Naveen C Bisht, Meetu Gupta
Arsenic (As), a non-essential metalloid, severely affects the normal functioning of plants, animals and humans. Plants play a crucial role in metabolic, physiological and numerous detoxification mechanisms to cope up with As induced stress. This study aimed to examine the differential response in two Brassica juncea cultivars, Varuna and Pusa Jagannath (PJn) exposed to different doses of As (50, 150, 300 μM) for 48 h duration. Change in morphological traits, concentration of individual as well as total GSL, sulfur related thiol proteins, sulfur content, and phytochemicals were analyzed in both cultivars...
November 30, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27928750/phytoextraction-of-arsenic-contaminated-soil-with-pteris-vittata-in-henan-province-china-comprehensive-evaluation-of-remediation-efficiency-correcting-for-atmospheric-depositions
#20
Mei Lei, Xiaoming Wan, Guanghui Guo, Junxing Yang, Tongbin Chen
Research on the appropriate method for evaluating phytoremediation efficiency is limited. A 2-year field experiment was conducted to investigate phytoremediation efficiency using the hyperaccumulator Pteris vittata on an arsenic (As)-contaminated site. The remediation efficiency was evaluated through the removal rate of As in soils and extraction rate of heavy metals in plants. After 2 years of remediation, the concentration of total As in soils decreased from 16.27 mg kg(-1) in 2012 to 14.58 mg kg(-1) in 2014...
December 7, 2016: Environmental Science and Pollution Research International
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