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https://www.readbyqxmd.com/read/28648727/detection-of-okadaic-acid-oa-using-elisa-and-colloidal-gold-immunoassay-based-on-monoclonal-antibody
#1
Rongzhi Wang, Linmao Zeng, Hang Yang, Yanfang Zhong, Juncheng Wang, Sumei Ling, Abdullah Farhan Saeed, Jun Yuan, Shihua Wang
Okadaic Acid (OA), a small seafood-borne toxin secreted by Dinophysis and Prorocentrum dinoflagellates, is generally distributed in various species of shellfish and has caused diarrhetic shellfish poisoning (DSP). In view of OA toxin threat to humans and animals, it is essential to develop a rapid, accurate and sensitive method for the detection and quantification of OA in real samples. In this study, a monoclonal antibody named 10E8 was screened by cells fusion of Sp2/0 with spleen cells isolated from immunized mouse, and the isotype of McAb 10E8 was belonged to IgG1...
June 16, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28647984/-screening-on-key-techniques-used-for-surveillance-and-disposal-of-public-health-emergencies
#2
Q R Zhu, L Yang, H Y Ma, W Q Xie, L M Cong, L W Xu
Objective: To explore the key techniques used for surveillance and disposal of infectious diseases, food poisoning and hospital infection to improve the ability of surveillance and disposal on public health emergency. Methods: Framework on surveillance and disposal of infectious diseases, food poisoning and hospital infection was set up, based on literature review and expert group discussion. Delphi method and technique for order preference by similarity to ideal solution comprehensive evaluation method were used for ordering preference by similarity, to screen key techniques set for surveillance and disposal of the above said events...
June 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28640301/synthesis-of-zwitterionic-palladium-complexes-and-their-application-as-catalysts-in-cross-coupling-reactions-of-aryl-heteroaryl-and-benzyl-bromides-with-organoboron-reagents-in-neat-water
#3
V Ramakrishna, N Dastagiri Reddy
N-(3-Chloro-2-quinoxalinyl)-N'-arylimidazolium salts (aryl = 2,6-diisopropylphenyl [HL1Cl]Cl, aryl = mesityl [HL2Cl]Cl) have been synthesized by treating 2,3-dichloroquinoxaline with the corresponding N'-arylimidazole in neat water. Facile reactions of these imidazolium salts with Pd(PPh3)4 and Pd2(dba)3/PPh3 (dba = dibenzyledene acetone) at 50 °C have afforded zwitterionic palladium(ii) complexes [Pd(HL1)(PPh3)Cl2] (I) and [Pd(HL2)(PPh3)Cl2] (II) in excellent yields. I and II have been tested for their ability to catalyze Suzuki-Miyaura cross coupling (SMC) reactions in neat water/K2CO3 and are found to be highly active for carrying out these reactions between aryl bromides and organoboron reagents...
June 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28629212/a-study-of-the-modulating-action-of-quercetin-on-biochemical-and-histological-alterations-induced-by-lead-exposure-in-the-liver-and-kidney-of-rats
#4
Azza Sedky, Hany Elsawy
Lead is a highly toxic metal and a very potent poison. Lead poisoning is a serious condition but can be treated. Quercetin is a flavonoid with many beneficial uses. The aim of the present study was to investigate the possible modulating action of quercetin as a model of an antioxidant against the toxic effects of lead acetate on liver and kidneys of rats. Rats were randomly divided into four groups: (i) saline group (control); (ii) lead group received i.p. lead acetate (20 mg/kg b.w.); (iii) quercetin group received i...
June 30, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28622140/reactive-nitrogen-species-rns-resistant-microbes-adaptation-and-medical-implications
#5
Sujeenthar Tharmalingam, Azhar Alhasawi, Varun P Appanna, Joe Lemire, Vasu D Appanna
Nitrosative stress results from an increase in reactive nitrogen species (RNS) within the cell. Though the RNS - nitric oxide (NO) and peroxynitrite (ONOO-) - play pivotal physiological roles, at elevated concentrations, these moieties can be poisonous to both prokaryotic and eukaryotic cells alike due to their capacity to disrupt a variety of essential biological processes. Numerous microbes are known to adapt to nitrosative stress by elaborating intricate strategies aimed at neutralizing RNS. In this review, we will discuss both the enzymatic systems dedicated to the elimination of RNS as well as the metabolic networks that are tailored to generate RNS-detoxifying metabolites - α-keto-acids...
June 15, 2017: Biological Chemistry
https://www.readbyqxmd.com/read/28609698/clinical-screening-of-paraquat-in-plasma-samples-using-capillary-electrophoresis-with-contactless-conductivity-detection-towards-rapid-diagnosis-and-therapeutic-treatment-of-acute-paraquat-poisoning-in-vietnam
#6
Anh Phuong Vu, Thi Ngan Nguyen, Thi Trang Do, Thu Ha Doan, Tran Hung Ha, Thi Thao Ta, Hung Long Nguyen, Peter C Hauser, Thi Anh Huong Nguyen, Thanh Duc Mai
The employment of a purpose-made capillary electrophoresis (CE) instrument with capacitively coupled contactless conductivity detection (C(4)D) as a simple and cost-effective solution for clinical screening of paraquat in plasma samples for early-stage diagnosis of acute herbicide poisoning is reported. Paraquat was determined using an electrolyte composed of 10mM histidine adjusted to pH 4 with acetic acid. A detection limit of 0.5mg/L was achieved. Good agreement between results from CE-C(4)D and the confirmation method (HPLC-UV) was obtained, with relative errors for the two pairs of data better than 20% for 31 samples taken from paraquat-intoxicated patients...
June 10, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28607368/nmr-structure-of-the-bacillus-cereus-hemolysin-ii-c-terminal-domain-reveals-a-novel-fold
#7
Anne R Kaplan, Katherine Kaus, Swastik De, Rich Olson, Andrei T Alexandrescu
In addition to multiple virulence factors, Bacillus cereus a pathogen that causes food poisoning and life-threatening wound infections, secretes the pore-forming toxin hemolysin II (HlyII). The HlyII toxin has a unique 94 amino acid C-terminal domain (HlyIIC). HlyIIC exhibits splitting of NMR resonances due to cis/trans isomerization of a single proline near the C-terminus. To overcome heterogeneity, we solved the structure of P405M-HlyIIC, a mutant that exclusively stabilizes the trans state. The NMR structure of HlyIIC reveals a novel fold, consisting of two subdomains αA-β1-β2 and β3-β4-αB-β5, that come together in a barrel-like structure...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28603841/influence-of-sulfuric-acid-on-the-performance-of-ruthenium-based-catalysts-in-the-liquid-phase-hydrogenation-of-levulinic-acid-to-%C3%AE-valerolactone
#8
Jamal Ftouni, Homer Genuino, Ara Munoz-Murillo, Pieter Bruijnincx, Bert Weckhuysen
The presence of biogenic or process-derived impurities poses a major problem on the efficient catalytic hydrogenation of biomass-derived levulinic acid to γ-valerolactone, hence, studies on their influence on catalyst stability are now required. Here, we investigate the influence of sulfuric acid as feed impurity on the performance of Ru-based heterogeneous catalysts, including Ru/ZrO2 and mono- and bimetallic Ru-on-carbon catalysts in dioxane as solvent. The carbon-supported Ru catalysts proved to be very sensitive to minor amounts of this impurity...
June 11, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28598418/taming-interfacial-electronic-properties-of-platinum-nanoparticles-on-vacancy-abundant-boron-nitride-nanosheets-for-enhanced-catalysis
#9
Wenshuai Zhu, Zili Wu, Guo Shiou Foo, Xiang Gao, Mingxia Zhou, Bin Liu, Gabriel M Veith, Peiwen Wu, Katie L Browning, Ho Nyung Lee, Huaming Li, Sheng Dai, Huiyuan Zhu
Taming interfacial electronic effects on Pt nanoparticles modulated by their concomitants has emerged as an intriguing approach to optimize Pt catalytic performance. Here, we report Pt nanoparticles assembled on vacancy-abundant hexagonal boron nitride nanosheets and their use as a model catalyst to embrace an interfacial electronic effect on Pt induced by the nanosheets with N-vacancies and B-vacancies for superior CO oxidation catalysis. Experimental results indicate that strong interaction exists between Pt and the vacancies...
June 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28585301/analysis-of-complete-genome-sequence-and-major-surface-antigens-of-neorickettsia-helminthoeca-causative-agent-of-salmon-poisoning-disease
#10
Mingqun Lin, Katherine Bachman, Zhihui Cheng, Sean C Daugherty, Sushma Nagaraj, Naomi Sengamalay, Sandra Ott, Al Godinez, Luke J Tallon, Lisa Sadzewicz, Claire Fraser, Julie C Dunning Hotopp, Yasuko Rikihisa
Neorickettsia helminthoeca, a type species of the genus Neorickettsia, is an endosymbiont of digenetic trematodes of veterinary importance. Upon ingestion of salmonid fish parasitized with infected trematodes, canids develop salmon poisoning disease (SPD), an acute febrile illness that is particularly severe and often fatal in dogs without adequate treatment. We determined and analysed the complete genome sequence of N. helminthoeca: a single small circular chromosome of 884 232 bp encoding 774 potential proteins...
July 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28584907/acute-psychoactive-and-toxic-effects-of-d-metel-on-mice-explained-by-1-h-nmr-based-metabolomics-approach
#11
Yonghong Fu, Zhihong Si, Pumin Li, Minghui Li, He Zhao, Lei Jiang, Yuexiao Xing, Wei Hong, Lingyu Ruan, Jun-Song Wang
Datura metel L. (D. metel) is one well-known folk medical herb with wide application and also the most abused plants all over the world, mainly for spiritual or religious purpose, over-dosing of which often produces poisonous effects. In this study, mice were orally administered with the extract of D. metel once a day at doses for 10 mg/kg and 40 mg/kg for consecutive 4 days, (1)H NMR based metabolomics approach aided with histopathological inspection and biochemical assays were used for the first time to study the psychoactive and toxic effects of D...
June 5, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28549573/the-dose-makes-the-poison-nutritional-overload-determines-the-life-traits-of-blood-feeding-arthropods
#12
REVIEW
Marcos Sterkel, José Henrique M Oliveira, Vanessa Bottino-Rojas, Gabriela O Paiva-Silva, Pedro L Oliveira
Vertebrate blood composition is heavily biased towards proteins, and hemoglobin, which is a hemeprotein, is by far the most abundant protein. Typically, hematophagous insects ingest blood volumes several times their weight before the blood meal. This barbarian feast offers an abundance of nutrients, but the degradation of blood proteins generates toxic concentrations of amino acids and heme, along with unparalleled microbiota growth. Despite this challenge, hematophagous arthropods have successfully developed mechanisms that bypass the toxicity of these molecules...
May 23, 2017: Trends in Parasitology
https://www.readbyqxmd.com/read/28545504/a-case-report-of-zinc-phosphide-poisoning-complicated-by-acute-renal-failure-and-tubulo-interstitial-nephritis
#13
Nilukshana Yogendranathan, H M M T B Herath, Thenuka Sivasundaram, R Constantine, Aruna Kulatunga
BACKGROUND: Run Rat® is a rodenticide widely used against small mammals. It comprises of a minimum of 32% zinc phosphide which is highly toxic in acute exposures to humans. It may be consumed accidentally or intentionally. It enters the body via skin, respiratory and gastrointestinal tracts. Zinc phosphide is hydrolyzed by the gastric acid and is transformed into phosphine gas. Phosphine is a respiratory toxin that inhibits cytochrome C oxidase system resulting in renal failure and liver failure...
May 25, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28540206/acute-kidney-injury-from-different-poisonous-substances
#14
Rubina Naqvi
AIM: To report our experience of acute kidney injury (AKI) developed after exposure to poisonous substance. METHODS: Retrospective study where data was collected from case records of patients coming to this institute during January 1990 to May 2016. This institution is a tertiary care center for renal care in the metropolitan city of Karachi, Pakistan. History of ingested substance, symptoms on presentation, basic laboratory tests on arrival, mode of treatment and outcome were recorded from all patients and are presented here...
May 6, 2017: World Journal of Nephrology
https://www.readbyqxmd.com/read/28535124/serum-creatinine-and-cystatin-c-provide-conflicting-evidence-of-acute-kidney-injury-following-acute-ingestion-of-potassium-permanganate-and-oxalic-acid
#15
Thilini Madushanka Wijerathna, Indika Bandara Gawarammana, Dhammika Menike Dissanayaka, Chathura Palanagasinghe, Fathima Shihana, Gihani Dassanayaka, Seyed Shahmy, Zoltan Huba Endre, Fahim Mohamed, Nicholas Alan Buckley
AIM: Acute kidney injury (AKI) is common following deliberate self-poisoning with a combination washing powder containing oxalic acid (H2C2O4) and potassium permanganate (KMnO4). Early and rapid increases in serum creatinine (sCr) follow severe poisoning. We investigated the relationship of these increases with direct nephrotoxicity in an ongoing multicenter prospective cohort study in Sri Lanka exploring AKI following poisoning. METHODS: Multiple measures of change in kidney function were evaluated in 48 consenting patients who had serial sCr and serum cystatin C (sCysC) data available...
May 23, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28530403/propitious-dendritic-cu2o-pt-nanostructured-anodes-for-direct-formic-acid-fuel-cells
#16
Gumaa A El-Nagar, Ahmad M Mohammad, Mohamed S El-Deab, Bahgat E El-Anadouli
This study introduces a novel competent dendritic copper oxide-platinum nanocatalyst (nano-Cu2O-Pt) immobilized onto a glassy carbon (GC) substrate for formic acid (FA) electro-oxidation (FAO); the prime reaction in the anodic compartment of direct formic acid fuel cells (DFAFCs). Interestingly, the proposed catalyst exhibited an outstanding improvement for FAO compared to the traditional platinum nanoparticles (nano-Pt) modified GC (nano-Pt/GC) catalyst. This was evaluated from steering the reaction mechanism toward the desired direct route producing carbon dioxide (CO2); consistently with mitigating the other undesired indirect pathway producing carbon monoxide (CO); the potential poison deteriorating the catalytic activity of typical Pt-based catalysts...
May 31, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28513110/separation-and-purification-of-two-minor-typical-diarrhetic-shellfish-poisoning-toxins-from-harmful-marine-microalgae-via-combined-liquid-chromatography-with-mass-spectrometric-detection
#17
Junhui Chen, Yanlong Wang, Lei Pan, Huihui Shen, Dan Fu, Boqiang Fu, Chengjun Sun, Li Zheng
A novel method was developed for the purification of two typical diarrhetic shellfish poisoning toxins from toxin-producing marine microalgae using macroporous resin, high-speed countercurrent chromatography-mass spectrometry, and semipreparative high-performance liquid chromatography-mass spectrometry. Analytical high-performance liquid chromatography-mass spectrometry was used for identification and purity analysis of okadaic acid and dinophysistoxin-1 because they exhibit no visible or ultraviolet absorption...
May 17, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28506107/immunoassay-approach-for-diagnosis-of-exposure-to-pyrrolizidine-alkaloids
#18
Na Li, Fan Zhang, Wei Lian, Huali Wang, Jiang Zheng, Ge Lin
Numerous pyrrolizidine alkaloid (PA) poisoning cases have been documented worldwide. Protein covalent binding with reactive metabolites generated from metabolic activation of PAs to form pyrrole-protein adducts is suggested to be a primary mechanism of PA-induced toxicities. The present study aimed to develop antibodies for diagnosis of PA exposure. Polyclonal antibodies were raised in rabbits and proven to specifically recognize pyrrole-protein adducts regardless of amino acid residues modified by the reactive metabolites of PAs...
May 16, 2017: Journal of Environmental Science and Health. Part C, Environmental Carcinogenesis & Ecotoxicology Reviews
https://www.readbyqxmd.com/read/28504347/a-rapid-method-to-screen-poisoning-causative-agents-in-an-acute-care-hospital-in-japan
#19
K Usui, H Mori, T Tachi, T Matsumura, K Mori, A Takeda, Y Noguchi, T Yoshimura, H Teramachi
WHAT IS KNOWN AND OBJECTIVE: A simple, rapid analysis is required to simultaneously analyse medicinal toxicants in emergency medical care. In this regard, the analysis of blood samples by LC-MS/MS equipped with a spin column, involving a rapid, simple pretreatment, has attracted attention. In this study, sample pretreatment using a Monospin C18 column was performed to screen 11 medicinal toxicants in blood samples by LC-MS/MS. METHODS: Serum samples supplemented with 11 medical toxicants-acetaminophen, salicylic acid, nitrazepam, diphenhydramine, bromvalerylurea, phenobarbital, amitriptyline, risperidone, fenitrothion, malathion and methomyl-were pretreated with the Monospin C18 column according to Pretreatment I and Pretreatment II, followed by LC-MS/MS analysis...
May 15, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28499205/comparative-metabolomics-analysis-for-the-compatibility-and-incompatibility-of-kansui-and-licorice-with-different-ratios-by-uhplc-qtof-ms-and-multivariate-data-analysis
#20
Juan Shen, Zong-Jin Pu, Jun Kai, An Kang, Yu-Ping Tang, Li-Li Shang, Gui-Sheng Zhou, Zhen-Hua Zhu, Er-Xin Shang, Shao-Ping Li, Yu-Jie Cao, Wei-Wei Tao, Shu-Lan Su, Li Zhang, Huiping Zhou, Da-Wei Qian, Jin-Ao Duan
Kansui, the root of Euphorbia kansui T.N. Liou ex T.P. Wang (Euphorbiaceae), is a well-known poisonous traditional Chinese medicine (TCM). However, many monographs of TCM indicated that it cannot be co-used with licorice, as kansui-licorice is a typical "eighteen incompatible" medicaments. Our previous studies have indicated that kansui was effective in treating malignant pleural effusion (MPE), and the efficacy could be weakened by the co-use of licorice, even causing serious toxicity at the given ratio. Nevertheless, the actual mechanisms of their dosage-toxicity-efficacy relationship need to be well clarified...
July 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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