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https://www.readbyqxmd.com/read/28527375/surfactant-enhanced-remediation-of-polycyclic-aromatic-hydrocarbons-a-review
#1
REVIEW
Shanti Lamichhane, K C Bal Krishna, Ranjan Sarukkalige
Polycyclic aromatic hydrocarbons (PAHs) are toxic, mutagenic and carcinogenic organic compounds that are widely present in the environment. The bioremediation of PAHs is an economical and environmentally friendly remediation technique, but it is limited because PAHs have low water solubility and fewer bioavailable properties. The solubility and bioavailability of PAHs can be increased by using surfactants to reduce surface tension and interfacial tension; this method is called surfactant-enhanced remediation (SER)...
May 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28527002/design-and-development-of-amperometric-biosensor-for-the-detection-of-lead-and-mercury-ions-in-water-matrix-a-permeability-approach
#2
Manju Bhargavi Gumpu, Uma Maheswari Krishnan, John Bosco Balaguru Rayappan
Intake of water contaminated with lead (Pb(2+)) and mercury (Hg(2+)) ions leads to various toxic effects and health issues. In this context, an amperometric urease inhibition-based biosensor was developed to detect Pb(2+) and Hg(2+) ions in water matrix. The modified Pt/CeO2/urease electrode was fabricated by immobilizing CeO2 nanoparticles and urease using a semi-permeable adsorption layer of nafion. With urea as a substrate, urease catalytic activity was examined through cyclic voltammetry. Further, maximum amperometric inhibitive response of the modified Pt/CeO2/urease electrode was observed in the presence of Pb(2+) and Hg(2+) ions due to the urease inhibition at specific potentials of -0...
May 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28526807/dihydroartemisinin-induces-autophagy-dependent-death-in-human-tongue-squamous-cell-carcinoma-cells-through-dna-double-strand-break-mediated-oxidative-stress
#3
Xinli Shi, Li Wang, Xiaoming Li, Jing Bai, Jianchun Li, Shenghao Li, Zeming Wang, Mingrui Zhou
Dihydroartemisinin is an effective antimalarial agent with multiple biological activities. In the present investigation, we elucidated its therapeutic potential and working mechanism on human tongue squamous cell carcinoma (TSCC). It was demonstrated that dihydroartemisinin could significantly inhibit cell growth in a dose- and time-dependent manner by the Cell Counting Kit-8 and colony formation assay in vitro. Meanwhile, autophagy was promoted in the Cal-27 cells treated by dihydroartemisinin, evidenced by increased LC3B-II level, increased autophagosome formation, and increased Beclin-1 level compared to dihydroartemisinin-untreated cells...
April 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28526414/a-novel-sirt1-inhibitor-4bb-induces-apoptosis-in-hct116-human-colon-carcinoma-cells-partially-by-activating-p53
#4
Ananga Ghosh, Amrita Sengupta, Guru Pavan Kumar Seerapu, Ali Nakhi, E V Venkat Shivaji Ramarao, Navneet Bung, Gopalakrishnan Bulusu, Manojit Pal, Devyani Haldar
The NAD+-dependent protein deacetylase SIRT1 has emerged as an important target for epigenetic therapeutics of colon cancer as its increased expression is associated with cancer progression. Additionally, SIRT1 represses p53 function via deacetylation, promoting tumor growth. Therefore, inhibition of SIRT1 is of great therapeutic interest for the treatment of colon cancer. Here, we report discovery of a novel quinoxaline based small molecule inhibitor of human SIRT1, 4bb, investigated its effect on viability of colon cancer cells and molecular mechanism of action...
May 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28526320/mercury-exposure-induces-cytoskeleton-disruption-and-loss-of-renal-function-through-epigenetic-modulation-of-mmp9-expression
#5
Hafizurrahman Khan, Radha Dutt Singh, Ratnakar Tiwari, Siddhartha Gangopadhyay, Somendu Kumar Roy, Dhirendra Singh, Vikas Srivastava
Mercury is one of the major heavy metal pollutants occurring in elemental, inorganic and organic forms. Due to ban on most inorganic mercury containing products, human exposure to mercury generally occurs as methylmercury (MeHg) by consumption of contaminated fish and other sea food. Animal and epidemiological studies indicate that MeHg affects neural and renal function. Our study is focused on nephrotoxic potential of MeHg. In this study, we have shown for the first time how MeHg could epigenetically modulate matrix metalloproteinase 9(MMP9) to promote nephrotoxicity using an animal model of sub chronic MeHg exposure...
May 16, 2017: Toxicology
https://www.readbyqxmd.com/read/28526123/-direct-mechanism-of-action-in-toxic-myopathies
#6
REVIEW
A Khelfi, M Azzouz, R Abtroun, M Reggabi, B Alamir
Toxic myopathies are a large group of disorders generated by surrounding agents and characterized by structural and/or functional disturbances of muscles. The most recurrent are those induced by commonly used medications. Illicit drugs, environmental toxins from animals, vegetables, or produced by micro-organisms as well as chemical products commonly used are significant causes of such disorders. The muscle toxicity results from multiple mechanisms at different biological levels. Many agents can induce myotoxicity through a direct mechanism in which statins, glucocorticoids and ethyl alcohol are the most representative...
May 16, 2017: Annales Pharmaceutiques Françaises
https://www.readbyqxmd.com/read/28526119/effects-of-temperature-salinity-and-composition-of-the-dinoflagellate-assemblage-on-the-growth-of-gambierdiscus-carpenteri-isolated-from-the-great-barrier-reef
#7
Leanne Sparrow, Paolo Momigliano, Garry R Russ, Kirsten Heimann
Increases in reported incidence of ciguatera fish poisoning (hereafter ciguatera) have been linked to warmer sea temperatures that are known to trigger coral bleaching events. The drivers that trigger blooms of ciguatera-causing dinoflagellates on the Great Barrier Reef (GBR) are poorly understood. This study investigated the effects of increased temperatures and lowered salinities, often associated with environmental disturbance events, on the population growth of two strains of the potentially ciguatera-causing dinoflagellate, Gambierdiscus carpenteri (NQAIF116 and NQAIF380)...
May 2017: Harmful Algae
https://www.readbyqxmd.com/read/28525880/differential-sulphur-assimilation-mechanism-regulates-response-of-arabidopsis-thaliana-natural-variation-towards-arsenic-stress-under-limiting-sulphur-condition
#8
Ria Khare, Smita Kumar, Tapsi Shukla, Avriti Ranjan, Prabodh Kumar Trivedi
Arsenic (As) is a ubiquitous element, which imposes threat to crops productivity and human health through contaminated food chain. As a part of detoxification mechanism, As is chelated and sequestered into the vacuoles via sulphur containing compounds glutathione (GSH) and phytochelatins (PCs). Under limiting sulphur (LS) conditions, exposure of As leads to enhanced toxic effects in plants. Therefore, it is a prerequisite to understand molecular mechanisms involved in As stress response under sulphur deficiency conditions in plants...
May 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28525816/evaluation-of-the-toxicity-of-herbicide-topramezone-to-chlorella-vulgaris-oxidative-stress-cell-morphology-and-photosynthetic-activity
#9
Fangfang Zhao, Qingqing Xiang, Ying Zhou, Xiao Xu, Xinyi Qiu, Yi Yu, Farooq Ahmad
Topramezone is a new, highly selective herbicide of pyrazole structure for the post-emergence control of broadleaf and grass weeds in corn. In this study, the effects of topramezone on C. vulgaris, especially in relation to the cell growth, oxidative stress, cell morphology and photosynthetic activity were assessed. Results showed that topramezone treatment was detrimental to C. vulgaris growth during the 24-96h of exposure. The changes in cells pigments content and relative transcript of photosynthesis-related genes, which implies that topramezone disrupted the photosynthetic system...
May 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28525813/ammonia-stress-on-nitrogen-metabolism-in-tolerant-aquatic-plant-myriophyllum-aquaticum
#10
Qingyang Zhou, Jingqing Gao, Ruimin Zhang, Ruiqin Zhang
Ammonia has been a major reason of macrophyte decline in the water environment, and ammonium ion toxicity should be seen as universal, even in species frequently labeled as "NH4(+) specialists". To study the effects of high NH4(+)-N stress of ammonium ion nitrogen on tolerant submerged macrophytes and investigate the pathways of nitrogen assimilation in different organisms, Myriophyllum aquaticum was selected and treated with various concentrations of ammonium ions at different times. Increasing of ammonium concentration leads to an overall increase in incipient ammonia content in leaves and stems of plants...
May 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28524888/reducing-unplanned-admissions-focusing-on-hospital-admissions-and-emergency-department-visits-for-patients-with-head-and-neck-cancer-during-radiation-therapy%C3%A2
#11
Lauren Terzo, Mary Fleming, Alekhya Yechoor, Jayne Camporeale, Miriam Troxler, Elaine Roth, Xianming Tan, Michael Pignone, Lawrence Marks, Bhishamjit S Chera
BACKGROUND: Head and neck cancer (HNC) treatments cause severe toxicities, leading to high rates of emergency department (ED) visits and unplanned hospital admissions (UHAs). 
. OBJECTIVES: The study aimed to evaluate a quality improvement project to reduce ED visits and UHAs.
. METHODS: A weekly nurse/nurse practitioner-led symptom management clinic was created for patients with HNC receiving radiation therapy deemed at high risk for an ED visit or UHA...
June 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/28524757/wood-smoke-exposure-of-portuguese-wildland-firefighters-dna-and-oxidative-damage-evaluation
#12
Ana Abreu, Carla Costa, Susana Pinho E Silva, Simone Morais, Maria do Carmo Pereira, Adília Fernandes, Vanessa Moraes de Andrade, João Paulo Teixeira, Solange Costa
Portugal is among the European Union countries most devastated by forest fires each year. In the last three decades, more than 3.8 million hectares of forest were burned. Wildland firefighters are exposed to a variety of hazards, including many toxic combustion products that may lead to deleterious health effects. Epidemiological studies showed a positive association between firefighting and several chronic diseases, including cancer. Results from biomonitoring studies in firefighters, particularly concerning genotoxicity evaluation, constitute a valuable tool for investigating important occupational hazards...
May 19, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28524233/bortezomib-sensitizes-human-osteosarcoma-cells-to-adriamycin-induced-apoptosis-through-ros-dependent-activation-of-p-eif2%C3%AE-atf4-chop-axis
#13
Miao Xian, Handi Cao, Ji Cao, Xuejing Shao, Difeng Zhu, Ning Zhang, Ping Huang, Weixu Li, Bo Yang, Meidan Ying, Qiaojun He
Osteosarcoma is the most common bone cancer, and chemotherapy is currently indispensable for its treatment. Adriamycin has been claimed to be the most effective agent for osteosarcoma, however, the outcome of adriamycin chemotherapy remains unsatisfactory. Here, we reported a potent combination therapy that bortezomib, a proteasome inhibitor, enhances adriamycin-induced apoptosis to eliminate osteosarcoma cells and we revealed that the activation of p-eIF2α/ATF4/CHOP axis is the underlying associated mechanisms...
May 19, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28524007/the-proinflammatory-cytokine-gitrl-contributes-to-trail-mediated-neurotoxicity-in-the-hcn-2-human-neuronal-cell-line
#14
Giulia Di Benedetto, Salvatore Saccone, Laurence Lempereur, Nicole Ronsisvalle, Giuseppe Nocentini, Rodolfo Bianchini, Carlo Riccardi, Renato Bernardini, Giuseppina Cantarella
Cytokines belonging to the TNF superfamily play a relevant role in neurodegenerative processes. Tumor Necrosis Factor-Related Apoptosis-Inducing Ligand (TRAIL), released during neuronal injury, has proven to potently mediate and sustain neurotoxic processes leading to neuronal death. Similarly to TRAIL, the cytokine Glucocorticoid-induced TNF receptor ligand (GITRL) is able to transduce proapoptotic signals. In spite of the array of reports suggesting relationships between TRAIL and other cytokines, scanty data are, so far, available about a GITRL/TRAIL crosstalk...
May 18, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28523742/bandgap-engineering-of-lead-free-double-perovskite-cs2agbibr6-through-trivalent-metal-alloying
#15
Kezhao Du, Weiwei Meng, Xiaoming Wang, Yanfa Yan, David B Mitzi
The double perovskite family, A2MIMIIIX6, represents a promising route to overcome the lead toxicity issue confronting current photovoltaic (PV) standout, CH3NH3PbI3. Given the generally large indirect bandgap within most known double perovskites, bandgap engineering provides an important approach for targeting outstanding PV performance within this family. Using Cs2AgBiBr6 as host, we demonstrate bandgap engineering through alloying of InIII/SbIII. Cs2Ag(Bi1-xMx)Br6 (M = In, Sb) accommodates up to 75% InIII with increased bandgap, and up to 37...
May 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28523625/identification-of-a-novel-putative-inhibitor-of-the-plasmodium-falciparum-purine-nucleoside-phosphorylase-exploring-the-purine-salvage-pathway-to-design-new-antimalarial-drugs
#16
Luciano Porto Kagami, Gustavo Machado das Neves, Ricardo Pereira Rodrigues, Vinicius Barreto da Silva, Vera Lucia Eifler-Lima, Daniel Fábio Kawano
Malaria, a tropical parasitic disease caused by Plasmodium spp., continues to place a heavy social burden, with almost 200 million cases and more than 580,000 deaths per year. Plasmodium falciparum purine nucleoside phosphorylase (PfPNP) can be targeted for antimalarial drug design since its inhibition kills malaria parasites both in vitro and in vivo. Although the currently known inhibitors of PfPNP, immucillins, are orally available and of low toxicity to animals and humans, to the best of our knowledge, none of these compounds has entered clinical trials for the treatment of malaria...
May 18, 2017: Molecular Diversity
https://www.readbyqxmd.com/read/28523618/the-effect-of-sewage-sludge-on-heavy-metal-concentrations-in-wheat-plant-triticum-aestivum-l
#17
Fatemeh Shahbazi, Somayeh Ghasemi, Hamid Sodaiezadeh, Kobra Ayaseh, Rasool Zamani-Ahmadmahmoodi
The use of sewage sludge in agricultural soils can improve soil physical and chemical properties and soil fertility by increasing organic materials; however, the presence of heavy metals in sewage sludge is a significant problem for the quality of agricultural products and the environment. Most heavy metals, due to their inactive nature, are stable and can affect human health. This study investigates the effect of sewage sludge on the concentration of copper, zinc, cadmium, lead, iron, and manganese in two varieties of wheat, i...
May 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28523611/exogenous-phosphatidylcholine-supplementation-retrieve-aluminum-induced-toxicity-in-male-albino-rats
#18
Asmaa Fahmy Khafaga
This study investigated the ameliorative potential of exogenous phosphatidylcholine (PC) against aluminum-induced toxicity in male albino rats. Four groups of rats were used for this study (N = 8): group I served as the control, group II (PC treated) received L-α-phosphatidylcholine (egg yolk-derived) 100 mg/kg bwt/day orally, group III (aluminum treated) received aluminum chloride 100 mg/kg bwt/day orally, and group VI (aluminum + PC treated) received similar oral dose of aluminum and PC (100 mg/kg bwt/day)...
May 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28522573/lenalidomide-melphalan-dexamethasone-in-newly-diagnosed-patients-with-al-amyloidosis-results-of-a-prospective-phase-2-study-with-long-term-follow-up
#19
Ute Hegenbart, Tilmann Bochtler, Axel Benner, Natalia Becker, Christoph Kimmich, Arnt V Kristen, Jörg Beimler, Ernst Hund, Markus Zorn, Anja Freiberger, Marianne Gawlik, Hartmut Goldschmidt, Dirk Hose, Anna Jauch, Anthony D Ho, Stefan O Schönland
Chemotherapy in light chain amyloidosis aims to normalize the involved free light chain in serum, which leads to an improvement or at least stabilization of organ function in most responding patients. We performed a prospective single center phase 2 trial with 50 untreated patients not eligible for high-dose treatment. The treatment schedule comprised 6 cycles of oral lenalidomide, melphalan and dexamethasone every 4 weeks. After 6 months complete remission was achieved in 9 patients (18%), very good partial remission in 16 (32%) and partial response in 9 (18%)...
May 18, 2017: Haematologica
https://www.readbyqxmd.com/read/28521980/sulphated-polysaccharide-isolated-from-sargassum-vulgare-characterization-and-hypolipidemic-effects
#20
Rihab Ben Abdallah Kolsi, Hichem Ben Salah, Neila Jardak, Rim Chaaben, Imed Jribi, Abdelfattah El Feki, Tarak Rebai, Kamel Jamoussi, Noureddine Allouche, Cristophe Blecker, Hafedh Belghith, Karima Belghith
A sulphated polysaccharide from brown algae Sargassum vulgare (SVSP) was extracted and examined with respect to chemical, structural characterization and hypolipidemic effects. SVSP consisted mainly of sulphate and total sugars with low levels of lipids and proteins. Its structure was studied by nuclear magnetic resonance (RMN), gas chromatography-mass spectrometry (GC-MS), infra-red spectroscopic, differential scanning calorimetry and X-ray diffraction analysis. Allowing us therefore to revealed that SVSP was composed of glucose, rhamnose, xylose, galactose, mannose and arabinose with XRD pattern that was typical for a semi-crystalline polymer and complexities of the spectra reflected its homogeneous structure...
August 15, 2017: Carbohydrate Polymers
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