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https://www.readbyqxmd.com/read/28815284/analysis-of-lipophilic-marine-biotoxins-by-liquid-chromatography-coupled-with-high-resolution-mass-spectrometry-in-seawater-from-the-catalan-coast
#1
Cristina Bosch-Orea, Josep Sanchís, Marinella Farré, Damià Barceló
Marine biotoxins regularly occur along the coast, with several consequences for the environment as well as the food industry. Monitoring of these compounds in seawater is required to assure the safety of marine resources for human consumption, providing a means for forecasting shellfish contamination events. In this study, an analytical method was developed for the detection of ten lipophilic marine biotoxins in seawater: azaspiracids 1, 2, 3, 4 and 5, classified as azaspiracid shellfish poisoning toxins, and pectenotoxin 2, okadaic acid and the related dinophysistoxin 1, yessotoxin and homoyessotoxin, classified as diarrheic shellfish poisoning toxins...
August 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28811602/identification-of-ciguatoxins-in-a-shark-involved-in-a-fatal-food-poisoning-in-the-indian-ocean
#2
Jorge Diogène, Laia Reverté, Maria Rambla-Alegre, Vanessa Del Río, Pablo de la Iglesia, Mònica Campàs, Oscar Palacios, Cintia Flores, Josep Caixach, Christian Ralijaona, Iony Razanajatovo, Agathe Pirog, Hélène Magalon, Nathalie Arnich, Jean Turquet
Severe food poisoning events after the consumption of sharks have been reported since the 1940s; however, there has been no clear understanding of their cause. Herein, we report for the first time the presence of ciguatoxins (CTXs) in sharks. The identification by mass spectrometry of CTXs, including two new analogues, in a bull shark (Carcharhinus leucas) that was consumed by humans, causing the poisoning and death of 11 people in Madagascar in 2013 is described. Typical neurotoxic ciguatera symptoms were recorded in patients, and toxicological assays on extracts of the shark demonstrated CTX-like activity...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28798883/magnetic-solid-phase-extraction-using-fe3o4-sio2-magnetic-nanoparticles-followed-by-uv-vis-spectrometry-for-determination-of-paraquat-in-plasma-and-urine-samples
#3
Ou Sha, Yu Wang, Xin Yin, Xiaobing Chen, Li Chen, Shujun Wang
A rapid and simple method was optimized and validated for the separation and quantification of paraquat, a frequently used herbicide and a leading cause of fatal poisoning worldwide, at trace levels with UV-Vis spectrophotometry in plasma and urine samples by direct magnetic solid-phase extraction. Fe3O4@SiO2 nanoparticles (NPs) were used as the magnetic solid-phase extraction agents and the paraquat absorbed on NPs was eluted using NaOH and ascorbic acid. Upon optimization, paraquat could be extracted and concentrated from various samples by 35-fold...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28789631/efficacy-of-glutathione-for-the-treatment-of-nonalcoholic-fatty-liver-disease-an-open-label-single-arm-multicenter-pilot-study
#4
Yasushi Honda, Takaomi Kessoku, Yoshio Sumida, Takashi Kobayashi, Takayuki Kato, Yuji Ogawa, Wataru Tomeno, Kento Imajo, Koji Fujita, Masato Yoneda, Koshi Kataoka, Masataka Taguri, Takeharu Yamanaka, Yuya Seko, Saiyu Tanaka, Satoru Saito, Masafumi Ono, Satoshi Oeda, Yuichiro Eguchi, Wataru Aoi, Kenji Sato, Yoshito Itoh, Atsushi Nakajima
BACKGROUND: Glutathione plays crucial roles in the detoxification and antioxidant systems of cells and has been used to treat acute poisoning and chronic liver diseases by intravenous injection. This is a first study examining the therapeutic effects of oral administration of glutathione in patients with nonalcoholic fatty liver disease (NAFLD). METHODS: The study was an open label, single arm, multicenter, pilot trial. Thirty-four NAFLD patients diagnosed using ultrasonography were prospectively evaluated...
August 8, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/28781900/blending-of-rodenticide-and-battery-acid-a-rare-and-fatal-suicide-mix
#5
Nisreen Abdul Rahman, Siddhartha Das, Vinod Ashok Chaudhari, Suresh Nandagopal, Bhawana Badhe
BACKGROUND: Self-poisoning usually occurs by the ingestion of a single lethal compound and majority of the poisoning cases in our country are due to the pesticides. Suicide by ingestion of more than one poisonous substance is rare except alcohol and multiple drugs. To the best of our knowledge, suicidal ingestion of a mixture of rodenticide and battery acid has not been reported before in medical literature. CASE PRESENTATION: Here we are discussing a case of simultaneous ingestion of two poisonous substances, i...
2017: Egyptian journal of forensic sciences
https://www.readbyqxmd.com/read/28780789/-the-study-of-using-salvianolate-treat-acute-lung-injury-in-rats-induced-by-paraquat
#6
Z W Wang, X X Li, X D Jian, Z C Zhang, B T Kan
Objective: To establish to paraquat poisoning acute lung injury animal model to study the therapeutic effect of Salvia polyphenols acid salt of paraquat-induced acute lung injury. Methods: Adult male Wister rats 120, were randomly divided into three groups: the paraquat exposure group, the start of the experiment to give a one-time 20% paraquat dope orally 50 mg/kg body weight of rats; salvianolate treatment group, the start of the experiment paraquat to give a one-time 20% the stock solution orally 50 mg/kg body weight of rats, and then given daily intraperitoneal injection of 200 mg/kg body weight of rats salvianolate; blank control group was given the same amount normal saline...
May 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28769771/upregulation-of-matrix-metalloproteinase-9-in-primary-cultured-rat-astrocytes-induced-by-2-chloroethanol-via-mapk-signal-pathways
#7
Tong Wang, Yingjun Liao, Qi Sun, Hongge Tang, Gaoyang Wang, Fenghong Zhao, Yaping Jin
2-Chloroethanol (2-CE) is one of the reactive metabolites of 1,2-DCE in vivo, which might contribute to brain edema formation induced by 1,2-dichloroethane (1,2-DCE) poisoning. Thus, the purpose of this study was to explore the roles of mitogen-activated protein kinase (MAPK) signal pathways in upregulation of matrix metalloproteinase-9 (MMP-9) in 2-CE exposed rat astrocytes. Expression of p38 MAPK (p38), extracellular signal regulated protein kinase (ERK), c-Jun N-terminal kinase (JNK) and MMP-9 at both protein and gene levels in rat astrocytes were determined using western blot and real-time RT-PCR methods...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28766147/the-black-rock-series-supported-scr-catalyst-for-no-x-removal
#8
Bin Xie, Hang Luo, Qing Tang, Jun Du, Zuohua Liu, Changyuan Tao
Black rock series (BRS) is of great potential for their plenty of valued oxides which include vanadium, iron, alumina and silica oxides, etc. BRS was used for directly preparing of selective catalytic reduction (SCR) catalyst by modifying its surface texture with SiO2-TiO2 sols and regulating its catalytic active constituents with V2O5 and MoO3. Consequently, 90% NO removal ratio was obtained within 300-400 °C over the BRS-based catalyst. The structure and properties of the BRS-based catalyst were characterized by the techniques of N2 adsorption-desorption, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), H2-temperature programmed reduction (H2-TPR), and NH3-temperature programmed desorption (NH3-TPD)...
August 1, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28755714/pseudo-nitzschia-simulans-sp-nov-bacillariophyceae-the-first-domoic-acid-producer-from-chinese-waters
#9
Yang Li, Chun Xiu Huang, Guo Shuang Xu, Nina Lundholm, Sing Tung Teng, Haiyan Wu, Zhijun Tan
The genus Pseudo-nitzschia has attracted attention because of production of the toxin, domoic acid (DA), causing Amnesic Shellfish Poisoning (ASP). Pseudo-nitzschia blooms occur frequently in Chinese coastal waters, and DA has been detected in several marine organisms, but so far no Pseudo-nitzschia strains from Chinese waters have been shown to produce DA. In this study, monoclonal Pseudo-nitzschia strains were established from Chinese coastal waters and examined using light microscopy, electron microscopy and molecular markers...
July 2017: Harmful Algae
https://www.readbyqxmd.com/read/28752295/nmr-based-metabolomics-reveals-the-metabolite-profiles-of-vibrio-parahaemolyticus-under-ferric-iron-stimulation
#10
Jun Zhou, Chenyang Lu, Dijun Zhang, Chennv Ma, Xiurong Su
Vibrio parahaemolyticus is a halophilic bacterium endemic to coastal areas, and its pathogenicity has caused widespread seafood poisoning. In our previous research, the protein expression of V. parahaemolyticus in Fe(3+) medium was determined using isobaric tags for relative and absolute quantitation (iTRAQ). Here, nuclear magnetic resonance (NMR) was used to detect changes in the V. parahaemolyticus metabolome. NMR spectra were obtained using methanol-water extracts of intracellular metabolites from V. parahaemolyticus under various culture conditions, and 62 metabolites were identified, including serine, arginine, alanine, ornithine, tryptophan, glutamine, malate, NAD(+), NADP(+), oxypurinol, xanthosine, dCTP, uracil, thymine, hypoxanthine, and betaine...
August 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28741370/non-health-care-facility-anticonvulsant-medication-errors-in-the-united-states
#11
Emily A DeDonato, Henry A Spiller, Marcel J Casavant, Thitphalak Chounthirath, Nichole L Hodges, Gary A Smith
INTRODUCTION: This study provides an epidemiological description of non-health care facility medication errors involving anticonvulsant drugs. METHODS: A retrospective analysis of National Poison Data System data was conducted on non-health care facility medication errors involving anticonvulsant drugs reported to US Poison Control Centers from 2000 through 2012. RESULTS: During the study period, 108,446 non-health care facility medication errors involving anticonvulsant pharmaceuticals were reported to US Poison Control Centers, averaging 8342 exposures annually...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28737813/the-synthesis-of-cuymnzal1-zox-mixed-oxide-as-a-low-temperature-nh3-scr-catalyst-with-enhanced-catalytic-performance
#12
Qinghua Yan, Sining Chen, Lei Qiu, Yanshan Gao, Dermot O'Hare, Qiang Wang
A new type of low-temperature selective catalytic reduction (SCR) catalyst, CuyMnzAl1-zOx, derived from layered double hydroxides is presented in this contribution. By tuning the Cu/Mn/Al ratio, the optimal catalyst Cu2Mn0.5Al0.5Ox resulted in a NOx conversion of 91.2% at 150 °C, which is much higher than that of all other control catalysts, Cu2AlOx (71.1%), Cu-Mn/γ-Al2O3 (65.23%), and Mn/γ-Al2O3 (59.32%). All samples were characterized in detail using various physico-chemical techniques including XRD, BET, FTIR, TEM, H2-TPR, NH3-TPD, and XPS analyses, and the results revealed that the superior catalytic performance of the Cu2Mn0...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28724414/effects-of-feeding-drunken-horse-grass-infected-with-epichlo%C3%A3-gansuensis-endophyte-on-animal-performance-clinical-symptoms-and-physiological-parameters-in-sheep
#13
Ying Liang, Hucheng Wang, Chunjie Li, Zhibiao Nan, Fadi Li
BACKGROUND: Many reports showed that grass-endophyte symbiosis induced livestock poisoned. Yet, there is no study evaluating clinical symptoms and physiological parameters in sheep fed Epichloë gansuensis endophyte-infected grass. The objective of the present study was to investigate these indexes by feeding sheep with endophyte-infected A. inebrians (E+ Group) or endophyte-free A. inebrians (E- Group) drunken horse grass or alfalfa hay (Control Group). RESULTS: The Epichloë endophyte caused obvious toxicity symptoms in the sheep fed E+ A...
July 19, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28716647/earwax-a-clue-to-discover-fluoroacetate-intoxication-in-cattle
#14
Engy Shokry, Fabrício Carrião Dos Santos, Paulo Henrique Jorge da Cunha, Maria Clorinda Soares Fioravanti, Antônio Dionísio Feitosa Noronha Filho, Naiara Zedes Pereira, Nelson Roberto Antoniosi Filho
An innovative method was developed to detect fluoroacetate poisoning in cattle by headspace/gas chromatographic analysis of earwax samples of intoxicated cattle. Samples were collected from 2 groups of cattle subjected to induced fluoroacetate intoxication, each group receiving a different dose of acetamide (antidote). Monofluoroacetic acid was detected in samples of intoxicated cattle in concentrations inversely proportional to the dose of acetamide. Thus, earwax analysis represents a successful approach for detection and monitoring of fluoroacetate poisoning...
July 15, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28708027/do-valenced-odors-and-trait-body-odor-disgust-affect-evaluation-of-emotion-in-dynamic-faces
#15
Elmeri Syrjänen, Marco Tullio Liuzza, Håkan Fischer, Jonas K Olofsson
Disgust is a core emotion evolved to detect and avoid the ingestion of poisonous food as well as the contact with pathogens and other harmful agents. Previous research has shown that multisensory presentation of olfactory and visual information may strengthen the processing of disgust-relevant information. However, it is not known whether these findings extend to dynamic facial stimuli that changes from neutral to emotionally expressive, or if individual differences in trait body odor disgust may influence the processing of disgust-related information...
January 1, 2017: Perception
https://www.readbyqxmd.com/read/28701428/a-mercury-toxicity-case-complicated-by-hyponatremia-and-abnormal-endocrinological-test-results
#16
Matthew Carter, Abdul Abdi, Fareeha Naz, Farouq Thabet, Arpita Vyas
Mercury (Hg) poisoning is considered a rare disease by the National Institutes of Health and the diagnosis can present great challenges to clinicians. Children who are exposed to Hg can present with a wide variety of symptoms, including acrodynia, tremor, excessive salivation, and psychiatric symptoms, including insomnia. However, endocrinologic manifestations from Hg exposure are less well known. This is a case report of a 12-year-old boy who presented with body rash, irritability, insomnia, and profuse sweating after returning from a summer camp...
August 2017: Pediatrics
https://www.readbyqxmd.com/read/28701067/metabolomic-approach-to-understand-the-acute-and-chronic-hepatotoxicity-of-veratrum-nigrum-extract-in-mice-based-on-ultra-high-performance-liquid-chromatography-coupled-with-quadrupole-time-of-flight-mass-spectrometry
#17
Ziheng Wei, Qingqing Qian, Xu Dong, Na Li, Guangchun Sun, Songyan Gao, Xin Dong
Veratrum nigrum L. (VN) is a poisonous traditional Chinese Medicine herb with thousands of years in China. Clinical studies have shown that VN has ability to cause hepatotoxicity, which severely limits its clinical use. The mechanism of its hepatotoxicity has not been fully elucidated. The purpose of this study was to develop and characterize a model of acute and chronic hepatotoxicity induced by Veratrum nigrum L. extract (VNE) to understand the mechanism by the liver tissue metabolomics approach based on ultra high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOFMS)...
July 13, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28700616/natural-variation-in-a-single-amino-acid-substitution-underlies-physiological-responses-to-topoisomerase-ii-poisons
#18
Stefan Zdraljevic, Christine Strand, Hannah S Seidel, Daniel E Cook, John G Doench, Erik C Andersen
Many chemotherapeutic drugs are differentially effective from one patient to the next. Understanding the causes of this variability is a critical step towards the development of personalized treatments and improvements to existing medications. Here, we investigate sensitivity to a group of anti-neoplastic drugs that target topoisomerase II using the model organism Caenorhabditis elegans. We show that wild strains of C. elegans vary in their sensitivity to these drugs, and we use an unbiased genetic approach to demonstrate that this natural variation is explained by a methionine-to-glutamine substitution in topoisomerase II (TOP-2)...
July 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28696398/maitotoxin-4-a-novel-mtx-analog-produced-by-gambierdiscus-excentricus
#19
Francesco Pisapia, Manoëlla Sibat, Christine Herrenknecht, Korian Lhaute, Greta Gaiani, Pierre-Jean Ferron, Valérie Fessard, Santiago Fraga, Silvia M Nascimento, R Wayne Litaker, William C Holland, Catherine Roullier, Philipp Hess
Maitotoxins (MTXs) are among the most potent toxins known. These toxins are produced by epi-benthic dinoflagellates of the genera Gambierdiscus and Fukuyoa and may play a role in causing the symptoms associated with Ciguatera Fish Poisoning. A recent survey revealed that, of the species tested, the newly described species from the Canary Islands, G. excentricus, is one of the most maitotoxic. The goal of the present study was to characterize MTX-related compounds produced by this species. Initially, lysates of cells from two Canary Island G...
July 11, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28694031/in-vivo-induction-of-regulatory-t-cells-promotes-allergen-tolerance-and-suppresses-allergic-contact-dermatitis
#20
Stephen C Balmert, Cara Donahue, John R Vu, Geza Erdos, Louis D Falo, Steven R Little
Allergic contact dermatitis (ACD) is a common T-cell mediated inflammatory skin condition, characterized by an intensely pruritic rash at the site of contact with allergens like poison ivy or nickel. Current clinical treatments use topical corticosteroids, which broadly and transiently suppress inflammation and symptoms of ACD, but fail to address the underlying immune dysfunction. Here, we present an alternative therapeutic approach that teaches the immune system to tolerate contact allergens by expanding populations of naturally suppressive allergen-specific regulatory T cells (Tregs)...
September 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
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