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https://www.readbyqxmd.com/read/29325729/amatoxin-containing-mushroom-poisonings-species-toxidromes-treatments-and-outcomes
#1
REVIEW
James H Diaz
Amatoxins are produced primarily by 3 species of mushrooms: Amanita, Lepiota, and Galerina. Because amatoxin poisonings are increasing, the objective of this review was to identify all amatoxin-containing mushroom species, present a toxidromic approach to earlier diagnoses, and compare the efficacies and outcomes of therapies. To meet these objectives, Internet search engines were queried with keywords to select peer-reviewed scientific articles on amatoxin-containing mushroom poisoning and management. Descriptive epidemiological analyses have documented that most mushroom poisonings are caused by unknown mushrooms, and most fatal mushroom poisonings are caused by amatoxin-containing mushrooms...
January 8, 2018: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/29295625/anti-hydroxyl-radical-activity-redox-potential-and-anti-ache-activity-of-amanita-strobiliformis-polysaccharide-extract
#2
Maja Karaman, Ljiljana Janjušević, Dragica Jakovljević, Filip Šibul, Boris Pejin
This study outlines antioxidant and anti-AChE activities of the polysaccharide (PSH) extract from the mushroom species Amanita strobiliformis. Both the presence of α and ß glucans within the aforementioned extract was recorded. PSH extract displayed a profound scavenging activity of OH radicals (IC50 value, 11.86 ± 0.59 μg/mL) and high potential for reduction of Fe3+ ions (174.11 ± 8.70 mg eq. AA/g d.w.) being almost 48- and 5-fold more effective than mannitol and butylated hydroxytoluene used as a positive control, respectively...
January 2, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29285878/a-comparison-of-the-effectiveness-of-silibinin-and-resveratrol-in-preventing-alpha-amanitin-induced-hepatotoxicity
#3
Aynur Sahin, M Aylin Arici, Yeliz Yılmaz, Sule Kalkan, Nergiz Durmus, Bekir Ugur Ergur, İlkay Aksu, Neşe Atabey, Yesim Tuncok
Amanita phalloides species mushrooms containing alpha amanitin (α-AMA) are responsible for the majority of fatal mushroom intoxications and can lead to severe poisonings resulting in hepatotoxicity and acute hepatic failure. Existing antidotes, such as silibinin, are not sufficiently effective in the prevention and/or resolution of α-AMA-induced hepatotoxicity. We investigated the effects of resveratrol on α-AMA-induced hepatotoxicity and compared with silibinin, a known antidote using in vivo and in vitro toxicity models...
December 29, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29240717/a-novel-antibiotic-mechanism-of-l-cyclopropylalanine-blocking-the-biosynthetic-pathway-of-essential-amino-acid-l-leucine
#4
Bingji Ma, Jinwen Shen, Wandee Yindeeyoungyeon, Yuan Ruan
The unusual amino acid l-cyclopropylalanine was isolated from the mushroom Amanita virgineoides after detection in an anti-fungal screening test. l-Cyclopropylalanine was found to exhibit broad-spectrum inhibition against fungi and bacteria. The anti-fungal activity was found to be abolished in the presence of the amino acid l-leucine, but not any other amino acids, indicating that l-cyclopropylalanine may block the biosynthesis of the essential amino acid l-leucine, thereby inhibiting fungal and bacteria growth...
December 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29228286/cut-and-paste-transposons-in-fungi-with-diverse-lifestyles
#5
Anna Muszewska, Kamil Steczkiewicz, Marta Stepniewska-Dziubinska, Krzysztof Ginalski
Transposons (TEs) shape genomes via recombination and transposition, lead to chromosomal rearrangements, create new gene neighbourhoods and alter gene expression. They play key roles in adaptation either to symbiosis in Amanita genus or to pathogenicity in Pyrenophora tritici-repentis. Despite growing evidence of their importance, the abundance and distribution of mobile elements replicating in a "cut and paste" fashion is barely described so far. In order to improve our knowledge on this old and ubiquitous class of transposable elements, 1,730 fungal genomes were scanned using both de novo and homology-based approaches...
December 8, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29200380/notes-on-amanita-section-caesareae-from-malaysia
#6
Li-Ping Tang, Su-See Lee, Nian-Kai Zeng, Qing Cai, Ping Zhang, Zhu L Yang
Some Amanita specimens collected from Malaysia are critically investigated by morphological examination and molecular analysis of two gene fragments, the nuc rDNA partial 28S (28S) gene and the internal transcriber spacer (ITS1-5.8S-ITS2 = ITS) regions. Six phylogenetic species of Amanita section Caesareae are recognized among the studied collections. One of them is described as new, A. malayensis. Four of the phylogenetic species correspond with existing morphology-based taxa: A. aporema, A. javanica, A. princeps, and A...
October 30, 2017: Mycologia
https://www.readbyqxmd.com/read/29186926/structural-diversity-and-biological-activities-of-fungal-cyclic-peptides-excluding-cyclodipeptides
#7
REVIEW
Xiaohan Wang, Minyi Lin, Dan Xu, Daowan Lai, Ligang Zhou
Cyclic peptides are cyclic compounds formed mainly by the amide bonds between either proteinogenic or non-proteinogenic amino acids. This review highlights the occurrence, structures and biological activities of fungal cyclic peptides (excluding cyclodipeptides, and peptides containing ester bonds in the core ring) reported until August 2017. About 293 cyclic peptides belonging to the groups of cyclic tri-, tetra-, penta-, hexa-, hepta-, octa-, nona-, deca-, undeca-, dodeca-, tetradeca-, and octadecapeptides as well as cyclic peptides containing ether bonds in the core ring have been isolated from fungi...
November 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29178299/nitrite-reduction-in-aqueous-solution-mediated-by-amavadin-homologues-n2o-formation-and-water-oxidation
#8
José da Silva, Lúcia Dias, Nihel Bekhti, Maxim L Kuznetsov, José A B Ferreira, Maria C Bacariza
Reactions of two vanadium(IV) complex anions - homologues of amavadin, [V(HIDPA)2]2- and [V(HIDA)2]2- (HIDPA = N-oxyiminodiproprionate, HIDA = N-oxyiminodiacetate) with nitrite-ion (NO2-) in aqueous solution were investigated by experimental (absorption spectroscopy in the visible range, by measurements of the dioxygen formed into solution from water oxidation and identification of nitrogen oxide species of gaseous atmosphere from nitrite reduction by an infrared analyser) and theoretical methods. Two reactions, mediated by the V complexes, with environmental and biological significance were observed in this system, i...
November 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29138589/clinical-characteristics-and-outcome-of-toxicity-from-amanita-mushroom-poisoning
#9
Satariya Trakulsrichai, Charuwan Sriapha, Achara Tongpoo, Umaporn Udomsubpayakul, Sunun Wongvisavakorn, Sahaphume Srisuma, Winai Wananukul
Objective: To describe and analyze the clinical characteristics and outcome of amatoxin poisoning cases. Methods: We performed a retrospective cohort study of amatoxin poisoning cases from Ramathibodi Poison Center Toxic Exposure Surveillance System, from May 2013 to August 2015. Results: There were 30 consultations with a total of 55 poisoning cases. Most cases were male and from the north-east region. Hepatitis, acute kidney injury, jaundice, and coagulopathy accounted for 74%, 46...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/29048788/-determination-of-amanitins-and-phallotoxins-in-wild-mushrooms-by-online-liquid-chromatography-diode-array-detector-tandem-mass-spectrometry
#10
Xiaomin Xu, Jingshun Zhang, Zengxuan Cai, Jing Zhang, Baifen Huang, Jiaojiao Xu, Qing Chen
A fast and wide linear range method was established for the determination of mushroom toxins amanitins (α-amanitin,β-amanitin and γ-amanitin) and phallotoxins (phallacidin and phalloidin) in wild mushrooms by online liquid chromatography-diode array detector-tandem mass spectrometry (LC-DAD-MS/MS). The mushroom toxins were extracted with methanol, and diluted with water. The extracts were separated on an XBridge(TM) BEH C18 column (150 mm×3.0 mm, 2.5 μm) under pH 10.7, measured by DAD and then analyzed by MS/MS...
June 8, 2017: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/28971768/a-review-on-phytochemistry-and-pharmacology-of-medicinal-as-well-as-poisonous-mushrooms
#11
Diksha Sharma, Virendra Pratap Singh, Narendra Kumar Singh
Mushrooms have an established history of use in traditional oriental medicine. Higher Basidiomycetes mushrooms contain biologically active compounds in fruit bodies, cultured mycelium, and cultured broth. Medicinal mushrooms possess medicinal properties such as anti-tumor, immunomodulating, antioxidant, cardiovascular, anti-hypercholesterolemic, anti-viral, anti-bacterial, anti-parasitic, anti-fungal, detoxification, hepatoprotective, and anti-diabetic effects. Several compounds isolated from medicinal mushrooms have been subjected to Phase-I, II, and III clinical trials, and are used extensively to treat various diseases including cancer...
September 27, 2017: Mini Reviews in Medicinal Chemistry
https://www.readbyqxmd.com/read/28905663/epidemiology-and-clinics-of-mushroom-poisoning-in-northern-italy-a-21-year-retrospective-analysis
#12
G Cervellin, I Comelli, G Rastelli, F Sanchis-Gomar, F Negri, C De Luca, G Lippi
BACKGROUND: Limited information exists about epidemiology and management of mushroom poisoning. We analyzed and described epidemiology, clinical presentation, and clinical course of mushroom-poisoned patients admitted to emergency departments (EDs) of the Province of Parma, Italy. METHODS: Data from the database of mycological service were matched with clinical information retrieved from hospitals' database, from January 1, 1996 to December 31, 2016. RESULTS: Mycologist consultation was obtained in 379/443 identified mushroom poisonings...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28898719/a-cost-effective-lc-ms-ms-method-for-identification-and-quantification-of-%C3%AE-amanitin-in-rat-plasma-application-to-toxicokinetic-study
#13
Chunlei Li, Fen Wei, Saqib Muhammad, Guangde Yang, Sicen Wang, Xinshe Liu
α-Amanitin is the main lethal component of amanita mushrooms, and data on its toxicokinetics are few. The aim of this study was to develop a sensitive and cost-effective method to identify α-amanitin and investigate its toxicokinetic parameters using liquid chromatography-triple quadrupole tandem mass spectrometry. The colchicine was used as the internal standard (IS). The compounds were extracted from plasma samples by protein precipitation with acetonitrile (containing 1% formic acid). The analysis was performed through multiple reactions monitoring...
October 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28895390/a-universal-method-for-the-identification-of-genes-encoding-amatoxins-and-phallotoxins-in-poisonous-mushrooms
#14
Agata Wołoszyn, Roman Kotłowski
Background: As the currently known diagnostic DNA targets amplified in the PCR assays for detection of poisonous mushrooms have their counterparts in edible species, there is a need to design PCR primers specific to the genes encoding amanitins and phallotoxins, which occur only in poisonous mushrooms. Objective: The aim of the study was testing of PCR-based method for detection of all genes encoding hepatotoxic cyclic peptides - amanitins and phallotoxins present in the most dangerous poisonous mushrooms...
2017: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/28868926/a-novel-chloro-substituted-pentenamide-from-the-fruiting-bodies-of-amanita-virgineoides
#15
Liang-Yan Liu, Ji-Kai Liu, Wen-Han Su, Tao Peng
One unusual chloro-substituted pentenamide, (3R)-4-chloro-3-hydroxy-4-pentenamide (1), together with 11 known compounds (2-12) were isolated from the fruiting bodies of Amanita virgineoides. The structure of 1 including the absolute configuration was characterized by extensive spectroscopic analyses and quantum calculation. Compound 1 displayed no obvious activity against herpes simplex virus (HSV), human enterovirus 71 (EV71) or coxsackievirus B3 (CVB3).
September 4, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28860534/genomic-and-transcriptomic-analyses-reveal-differential-regulation-of-diverse-terpenoid-and-polyketides-secondary-metabolites-in-hericium-erinaceus
#16
Juan Chen, Xu Zeng, Yan Long Yang, Yong Mei Xing, Qi Zhang, Jia Mei Li, Ke Ma, Hong Wei Liu, Shun Xing Guo
The lion's mane mushroom Hericium erinaceus is a famous traditional medicinal fungus credited with anti-dementia activity and a producer of cyathane diterpenoid natural products (erinacines) useful against nervous system diseases. To date, few studies have explored the biosynthesis of these compounds, although their chemical synthesis is known. Here, we report the first genome and tanscriptome sequence of the medicinal fungus H. erinaceus. The size of the genome is 39.35 Mb, containing 9895 gene models. The genome of H...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28830736/-evaluation-of-the-toxicity-of-basidiomycota-fungi-on-the-hatching-of-artemia-franciscana-cysts
#17
Luis Eduardo Ruiz-González, Juan Antonio Vázquez-Zea, Fernando Vega-Villasante, Laura Guzmán-Dávalos, Saúl Rogelio Guerrero-Galván
BACKGROUND: The consumption of wild mushrooms has increased in recent years. However, not all mushrooms are edible and some of them may cause poisoning. Therefore, their toxicity needs to be studied. Artemia franciscana is a crustacean used in toxicity tests including toxins of fungi. AIMS: To determine the percentage of inhibition and mortality produced by extracts of several basidiomycetes on the hatching of A. franciscana cysts. METHODS: Aqueous extracts were prepared from 15 species of mushrooms collected from Jalisco state, Mexico...
August 19, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28830233/investigating-and-analyzing-three-cohorts-of-mushroom-poisoning-caused-by-amanita-exitialis-in-yunnan-china
#18
J Sun, H-J Li, H-S Zhang, Y-Z Zhang, J-W Xie, P-B Ma, C Guo, C Y Sun
Amanita exitialis is a lethal mushroom found in China. Knowledge regarding taxonomic characterization, toxin detection, general poisoning conditions, clinical manifestations, laboratory examinations, and clinical treatments for this species is currently lacking. We investigated three A. exitialis mushroom poisoning cohorts in Yunnan Province in 2014 and 2015, involving 10 patients. Mushroom samples were identified by morphological and molecular studies. Ultra performance liquid chromatography-electrospray ionization tandem mass spectrometry was used to detect the peptide toxins in the mushroom samples...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28819747/word-wide-meta-analysis-of-quercus-forests-ectomycorrhizal-fungal-diversity-reveals-southwestern-mexico-as-a-hotspot
#19
Olimpia Mariana García-Guzmán, Roberto Garibay-Orijel, Edith Hernández, Elsa Arellano-Torres, Ken Oyama
Quercus is the most diverse genus of ectomycorrhizal (ECM) host plants; it is distributed in the Northern and Southern Hemispheres, from temperate to tropical regions. However, their ECM communities have been scarcely studied in comparison to those of conifers. The objectives of this study were to determine the richness of ECM fungi associated with oak forests in the Cuitzeo basin in southwestern Mexico; and to determine the level of richness, potential endemism and species similarity among ECM fungal communities associated with natural oak forests worldwide through a meta-analysis...
November 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28800852/growth-of-amanita-caesarea-in-the-presence-of-pseudomonas-fluorescens-and-bacillus-cereus
#20
J M Cano, M Berrocal-Lobo, J A Domínguez-Núñez
The ectomycorrhizal (ECM) fungus Amanita caesarea CECT 20127 was tested in vitro with two potentially mycorrhizal-promoting bacterial strains, Pseudomonas fluorescens CECT 844 and Bacillus cereus CECT 148. Although P. fluorescens showed spatial and temporal compatibility with A. caesarea, it did not affect growth of the fungus. Conversely, B. cereus exhibited no such compatibility and also inhibited fungal growth. The expression pattern of the A. caesarea gene AcMST-1 was analysed using real-time quantitative polymerase chain reaction (qPCR) at three time points...
September 2017: Fungal Biology
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