Mycotoxin Concentration Alternaria Toxins Alternariol 1.82 Aspergillus
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Ranking of Substances for Monitoring in Foods, Drinks and Dietary Supplements - Based on Risk and Knowledge Gaps
VKM Report 2019: 13 Ranking of substances for monitoring in foods, drinks and dietary supplements - based on risk and knowledge gaps Scientific Opinion of the Scientific Steering Committee of the Norwegian Scientific Committee for Food and Environment Scientific Opinion of the Scientific Steering Committee of the Norwegian Scientific Committee for Food and Environment 16.09.2019 ISBN: 978-82-8259-329-8 ISSN: 2535-4019 Norwegian Scientific Committee for Food and Environment (VKM) Po 222 Skøyen N – 0213 Oslo Norway Phone: +47 21 62 28 00 Email: [email protected] vkm.no vkm.no/english Cover photo: Brace Suggested citation: VKM, Inger-Lise Steffensen, Christiane Kruse Fæste, Trine Husøy, Helle Katrine Knutsen, Gro Haarklou Mathisen, Robin Ørnsrud, Angelika Agdestein, Johanna Bodin, Edel Elvevoll, Dag O. Hessen, Merete Hofshagen, Åshild Krogdahl, Asbjørn Magne Nilsen, Trond Rafoss, Taran Skjerdal, Gaute Velle, Yngvild Wasteson, Gro-Ingunn Hemre, Vigdis Vandvik, Jan Alexander (2019). Ranking of substances for monitoring in foods, drinks and dietary supplements - based on risk and knowledge gaps. Scientific Opinion of the Scientific Steering Committee of the Norwegian Scientific Committee for Food and Environment. VKM report 2019:13, ISBN: 978-82-8259-329-8, ISSN: 2535-4019. VKM Report 2019: 13 Ranking of substances for monitoring in foods, drinks and dietary supplements - based on risk and knowledge gaps Preparation of the opinion The Norwegian Scientific Committee for Food and Environment (Vitenskapskomiteen for mat og miljø, VKM) appointed a project group to answer the request from the Norwegian Food Safety Authority. The project group consisted of six VKM members and a project leader from the VKM secretariat. -
Alternaria Alternata Toxins Synergistically Activate the Aryl Hydrocarbon Receptor Pathway in Vitro
biomolecules Article Alternaria alternata Toxins Synergistically Activate the Aryl Hydrocarbon Receptor Pathway In Vitro Julia Hohenbichler 1 , Georg Aichinger 1 , Michael Rychlik 2 , Giorgia Del Favero 1 and Doris Marko 1,* 1 Department of Food Chemistry and Toxicology, University of Vienna, 1090 Vienna, Italy; [email protected] (J.H.); [email protected] (G.A.); [email protected] (G.D.F.) 2 Chair of Analytical Chemistry, Technical University of Munich, 80333 Munich, Germany; [email protected] * Correspondence: [email protected] Received: 18 June 2020; Accepted: 30 June 2020; Published: 9 July 2020 Abstract: Alternaria molds simultaneously produce a large variety of mycotoxins, of which several were previously reported to induce enzymes of phase I metabolism through aryl hydrocarbon receptor activation. Thus, we investigated the potential of naturally occurring Alternaria toxin mixtures to induce Cytochrome P450 (CYP) 1A1/1A2/1B1 activity. Two variants of an extract from cultured Alternaria alternata, as well as the toxins alternariol (AOH), alternariol monomethyl ether (AME), altertoxin I (ATX-I), and altertoxin II (ATX-II), were tested singularly and in binary mixtures applying the 7-ethoxy-resorufin-O-deethylase (EROD) assay in MCF-7 breast cancer cells. Sub-cytotoxic concentrations of the two toxin mixtures, as well as ATX-I, ATX-II and AOH, exhibited dose-dependent enhancements of CYP 1 activity. ATX-I and ATX-II interacted synergistically in this respect, demonstrating the two perylene quinones as major contributors to the extract’s potential. Binary mixtures between AOH and the two altertoxins respectively exhibited concentration-dependent antagonistic as well as synergistic combinatory effects. -
Nicotine Induces Polyspermy in Sea Urchin Eggs Through a Non-Cholinergic Pathway Modulating Actin Dynamics
cells Article Nicotine Induces Polyspermy in Sea Urchin Eggs through a Non-Cholinergic Pathway Modulating Actin Dynamics 1,2 1, 2 1, Nunzia Limatola , Filip Vasilev y, Luigia Santella and Jong Tai Chun * 1 Department of Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn, I-80121 Napoli, Italy; [email protected] (N.L.); [email protected] (F.V.) 2 Department of Research Infrastructures for Marine Biological Resources, Stazione Zoologica Anton Dohrn, I-80121 Napoli, Italy; [email protected] * Correspondence: [email protected] Current address: Centre de Recherche du Centre Hospitalier de l’Université de Montreal (CRCHUM) y Montreal, QC H2X 0A9, Canada. Received: 8 November 2019; Accepted: 21 December 2019; Published: 25 December 2019 Abstract: While alkaloids often exert unique pharmacological effects on animal cells, exposure of sea urchin eggs to nicotine causes polyspermy at fertilization in a dose-dependent manner. Here, we studied molecular mechanisms underlying the phenomenon. Although nicotine is an agonist of ionotropic acetylcholine receptors, we found that nicotine-induced polyspermy was neither mimicked by acetylcholine and carbachol nor inhibited by specific antagonists of nicotinic acetylcholine receptors. Unlike acetylcholine and carbachol, nicotine uniquely induced drastic rearrangement of egg cortical microfilaments in a dose-dependent way. Such cytoskeletal changes appeared to render the eggs more receptive to sperm, as judged by the significant alleviation of polyspermy by latrunculin-A and mycalolide-B. In addition, our fluorimetric assay provided the first evidence that nicotine directly accelerates polymerization kinetics of G-actin and attenuates depolymerization of preassembled F-actin. Furthermore, nicotine inhibited cofilin-induced disassembly of F-actin. -
Bioactive Marine Drugs and Marine Biomaterials for Brain Diseases
Mar. Drugs 2014, 12, 2539-2589; doi:10.3390/md12052539 OPEN ACCESS marine drugs ISSN 1660–3397 www.mdpi.com/journal/marinedrugs Review Bioactive Marine Drugs and Marine Biomaterials for Brain Diseases Clara Grosso 1, Patrícia Valentão 1, Federico Ferreres 2 and Paula B. Andrade 1,* 1 REQUIMTE/Laboratory of Pharmacognosy, Department of Chemistry, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, no. 228, 4050-313 Porto, Portugal; E-Mails: [email protected] (C.G.); [email protected] (P.V.) 2 Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS (CSIC), P.O. Box 164, Campus University Espinardo, Murcia 30100, Spain; E-Mail: [email protected] * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +351-22042-8654; Fax: +351-22609-3390. Received: 30 January 2014; in revised form: 10 April 2014 / Accepted: 16 April 2014 / Published: 2 May 2014 Abstract: Marine invertebrates produce a plethora of bioactive compounds, which serve as inspiration for marine biotechnology, particularly in drug discovery programs and biomaterials development. This review aims to summarize the potential of drugs derived from marine invertebrates in the field of neuroscience. Therefore, some examples of neuroprotective drugs and neurotoxins will be discussed. Their role in neuroscience research and development of new therapies targeting the central nervous system will be addressed, with particular focus on neuroinflammation and neurodegeneration. In addition, the neuronal growth promoted by marine drugs, as well as the recent advances in neural tissue engineering, will be highlighted. Keywords: aragonite; conotoxins; neurodegeneration; neuroinflammation; Aβ peptide; tau hyperphosphorylation; protein kinases; receptors; voltage-dependent ion channels; cyclooxygenases Mar. -
Fungi.Mycotoxins.Pdf
Fungi: Mycotoxin: Acremonium crotocinigenum Crotocin Aspergillus favus Alfatoxin B, cyclopiazonic acid Aspergillus fumigatus Fumagilin, gliotoxin Aspergillus carneus Critrinin Aspergillus clavatus Cytochalasin, patulin Aspergillus Parasiticus Alfatoxin B Aspergillus nomius Alfatoxin B Aspergillus niger Ochratoxin A, malformin, oxalicacid Aspergillus nidulans Sterigmatocystin Aspergillus ochraceus Ochratoxin A, penicillic acid Aspergillus versicolor Sterigmatocystin, 5 ethoxysterigmatocystin Aspergillus ustus Ausdiol, austamide, austocystin, brevianamide Aspergillus terreus Citreoviridin Alternaria Alternariol, altertoxin, altenuene, altenusin, tenuazonic acid Arthrinium Nitropropionic acid Bioploaris Cytochalasin, sporidesmin, sterigmatocystin Chaetomium Chaetoglobosin A,B,C. Sterigmatocystin Cladosporium Cladosporic acid Clavipes purpurea Ergotism Cylindrocorpon Trichothecene Diplodia Diplodiatoxin Fusarium Trichothecene, zearalenone Fusarium moniliforme Fumonisins Emericella nidulans Sterigmatocystin Gliocladium Gliotoxin Memnoniella Griseofulvin, dechlorogriseofulvin, epidecholorgriseofulvin, trichodermin, trichodermol Myrothecium Trichothecene Paecilomyces Patulin, viriditoxin Penicillium aurantiocandidum Penicillic acid Penicillium aurantiogriseum Penicillic acid Penicillium brasalianum Penicillic acid Penicillium brevicompactum Mycophenolic acid Penicillium camemberti Cyclopiazonic acid Penicillium carneum Mycophenolic acid, Roquefortine C Penicillium crateriforme Rubratoxin Penicillium citrinum Citrinin Penicillium commune Cyclopiazonic -
Eosinophil Functions Mitogen-Activated Protein Kinase In
The Differential Role of Extracellular Signal-Regulated Kinases and p38 Mitogen-Activated Protein Kinase in Eosinophil Functions This information is current as of September 30, 2021. Tetsuya Adachi, Barun K. Choudhury, Susan Stafford, Sanjiv Sur and Rafeul Alam J Immunol 2000; 165:2198-2204; ; doi: 10.4049/jimmunol.165.4.2198 http://www.jimmunol.org/content/165/4/2198 Downloaded from References This article cites 57 articles, 38 of which you can access for free at: http://www.jimmunol.org/content/165/4/2198.full#ref-list-1 http://www.jimmunol.org/ Why The JI? Submit online. • Rapid Reviews! 30 days* from submission to initial decision • No Triage! Every submission reviewed by practicing scientists • Fast Publication! 4 weeks from acceptance to publication by guest on September 30, 2021 *average Subscription Information about subscribing to The Journal of Immunology is online at: http://jimmunol.org/subscription Permissions Submit copyright permission requests at: http://www.aai.org/About/Publications/JI/copyright.html Email Alerts Receive free email-alerts when new articles cite this article. Sign up at: http://jimmunol.org/alerts The Journal of Immunology is published twice each month by The American Association of Immunologists, Inc., 1451 Rockville Pike, Suite 650, Rockville, MD 20852 Copyright © 2000 by The American Association of Immunologists All rights reserved. Print ISSN: 0022-1767 Online ISSN: 1550-6606. The Differential Role of Extracellular Signal-Regulated Kinases and p38 Mitogen-Activated Protein Kinase in Eosinophil Functions1 Tetsuya Adachi, Barun K. Choudhury, Susan Stafford, Sanjiv Sur, and Rafeul Alam2 The activation of eosinophils by cytokines is a major event in the pathogenesis of allergic diseases. -
Calcium Dependence of Phalloidin-Induced Liver Cell Death (Toxin/Plasma Membrane/Cytochalasin B/Microfilaments/Scanning Electron Microscopy) AGNES B
Proc. Nati. Acad. Sci. USA Vol. 77, No. 2, pp. 1177-1180, February 1980 Medical Sciences Calcium dependence of phalloidin-induced liver cell death (toxin/plasma membrane/cytochalasin B/microfilaments/scanning electron microscopy) AGNES B. KANE, ELLORA E. YOUNG, FRANCIS A. X. SCHANNE, AND JOHN L. FARBER* Department of Pathology and the Fels Research Institute, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 Communicated by Hans Popper, December 10, 1979 ABSTRACT The role of Ca2+ in toxic liver cell death was Phalloidin is a toxic bicyclic heptapeptide isolated from the studied with primary cultures of adult rat hepatocytes. Within mushroom Amanita phalloides (16, 17). Treated animals die 1 hr of exposure to phalloidin, a bicyclic heptapeptide isolated within a few hours with a hemorrhagic necrosis of the liver from the mushroom Amanita phalloides, at 50 ,g/ml, 60-70% of the cells were dead (trypan blue stainable). There was no loss characterized by numerous nonfatty vacuoles (18). Phalloidin of viability of the same cells exposed to phalloidin in culture is active on rat hepatocytes in uitro, where it produces easily medium devoid of Ca2+. A marked structural alteration of the observed deformations of the cell surface that accompany the surface of the phalloidin-treated hepatocytes characterized by death of the cells (14, 15). The protrusions or evaginations of innumerable evaginations seen by scanning electron microscopy the plasma membrane seen by scanning electron microscopy occurred in the presence or absence of Ca2+. Pretreatment of are felt to to the of the the cells with cytochalasin B at Ig/ml10 prevented the surface correspond invaginations plasma alteration and the death of the cells in Ca2+ medium. -
Contractile Dysfunction in Heart Failure and Familial Hypertrophic Cardiomyopathy
CONTRACTILE DYSFUNCTION IN HEART FAILURE AND FAMILIAL HYPERTROPHIC CARDIOMYOPATHY By YI-HSIN CHENG Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy Dissertation Adviser: Dr. Julian E. Stelzer Department of Physiology and Biophysics CASE WESTERN RESERVE UNIVERSITY January, 2014 CASE WESTERN RESERVE UNIVERSITY SCHOOL OF GRADUATE STUDIES We hereby approve the thesis/dissertation of __________Yi-Hsin Cheng ________________________________ candidate for the _________Doctoral_______________________degree *. (signed)__________Corey Smith_______________________ (chair of the committee) ___________Julian Stelzer ______________________ ___________Thomas Nosek _____________________ ___________David Van Wagoner _________________ ___________Brian Hoit _________________________ ___________Xin Yu ___________________________ (date) ______September 10th, 2013________________ *We also certify that written approval has been obtained for any proprietary material contained therein. ii DEDICATION To my family overseas, who have supported me and allowed me to pursue anything I want. To my boyfriend, who has helped me through the conflicts and struggles due to the nature of this work and led me on the right path. To my vegan mentors and community, who continue to give me hope. iii TABLE OF CONTENTS List of Tables ix List of Figures x Acknowledgements xii List of Abbreviations xv Abstract xx Chapter 1: Cardiac Health and Disease 22 1.1 Introduction 22 1.2 Cardiac Structure and Functions 23 1.2.1 Heart Structure and Functions -
Difference in F-Actin Depolymerization Induced by Toxin B from The
Toxins 2013, 5, 106-119; doi:10.3390/toxins5010106 OPEN ACCESS toxins ISSN 2072-6651 www.mdpi.com/journal/toxins Article Difference in F-Actin Depolymerization Induced by Toxin B from the Clostridium difficile Strain VPI 10463 and Toxin B from the Variant Clostridium difficile Serotype F Strain 1470 Martin May 1, Tianbang Wang 1, Micro Müller 2 and Harald Genth 1,* 1 Institute of Toxicology Hannover Medical School, Hannover D-30625, Germany; E-Mails: [email protected] (M.M.); [email protected] (T.W.) 2 Institute of Biophysical Chemistry, Hannover Medical School, Hannover D-30625, Germany; E-Mail: [email protected] * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +49-511-532-9168; Fax: +49-511-532-2879. Received: 14 November 2012; in revised form: 14 December 2012 / Accepted: 28 December 2012 / Published: 11 January 2013 Abstract: Clostridium difficile toxin A (TcdA) and toxin B (TcdB) are the causative agent of the C. difficile-associated diarrhea (CDAD) and its severe form, the pseudomembranous colitis (PMC). TcdB from the C. difficile strain VPI10463 mono-glucosylates (thereby inactivates) the small GTPases Rho, Rac, and Cdc42, while Toxin B from the variant C. difficile strain serotype F 1470 (TcdBF) specifically mono-glucosylates Rac but not Rho(A/B/C). TcdBF is related to lethal toxin from C. sordellii (TcsL) that glucosylates Rac1 but not Rho(A/B/C). In this study, the effects of Rho-inactivating toxins on the concentrations of cellular F-actin were investigated using the rhodamine-phalloidin-based F-actin ELISA. -
Impact of Actin Filament Stabilization on Adult Hippocampal and Olfactory Bulb Neurogenesis
The Journal of Neuroscience, March 3, 2010 • 30(9):3419–3431 • 3419 Development/Plasticity/Repair Impact of Actin Filament Stabilization on Adult Hippocampal and Olfactory Bulb Neurogenesis Golo Kronenberg,1,2,5* Karen Gertz,1,2* Tina Baldinger,1 Imke Kirste,5 Sarah Eckart,3 Ferah Yildirim,1 Shengbo Ji,1 Isabella Heuser,5 Helmut Schro¨ck,6 Heide Ho¨rtnagl,4 Reinhard Sohr,4 Pierre Chryso Djoufack,7 Rene´Ju¨ttner,8 Rainer Glass,8 Ingo Przesdzing,1 Jitender Kumar,8 Dorette Freyer,1 Rainer Hellweg,3 Helmut Kettenmann,8 Klaus Benno Fink,7 and Matthias Endres1,2 1Klinik und Poliklinik fu¨r Neurologie, 2Center for Stroke Research Berlin, 3Klinik fu¨r Psychiatrie und Psychotherapie, and 4Institut fu¨r Pharmakologie und Toxikologie, Charite´-Universita¨tsmedizin Berlin, D-10117 Berlin, Germany, 5Klinik und Hochschulambulanz fu¨r Psychiatrie und Psychotherapie, Charite´- Universita¨tsmedizin Berlin, D-14050 Berlin, Germany, 6Institut fu¨r Neurophysiologie, Medizinische Fakulta¨t Mannheim, Universita¨t Heidelberg, D-68167 Mannheim, Germany, 7Institut fu¨r Pharmakologie und Toxikologie, Universita¨t Bonn, D-53113 Bonn, Germany, and 8Max Delbru¨ck Center for Molecular Medicine, D-13092 Berlin, Germany Rearrangement of the actin cytoskeleton is essential for dynamic cellular processes. Decreased actin turnover and rigidity of cytoskeletal structures have been associated with aging and cell death. Gelsolin is a Ca 2ϩ-activated actin-severing protein that is widely expressed throughout the adult mammalian brain. Here, we used gelsolin-deficient (Gsn Ϫ/Ϫ) mice as a model system for actin filament stabiliza- tion. In Gsn Ϫ/Ϫ mice, emigration of newly generated cells from the subventricular zone into the olfactory bulb was slowed. -
Emergence of a Bacterial Clone with Enhanced Virulence by Acquisition of a Phage Encoding a Secreted Phospholipase A2 Izabela Sitkiewicz*, Michal J
Emergence of a bacterial clone with enhanced virulence by acquisition of a phage encoding a secreted phospholipase A2 Izabela Sitkiewicz*, Michal J. Nagiec*†, Paul Sumby*, Stephanie D. Butler‡, Colette Cywes-Bentley§, and James M. Musser*¶ *Center for Molecular and Translational Human Infectious Diseases Research, Methodist Hospital Research Institute, Houston, TX 77030; ‡Southwest Foundation for Biomedical Research, San Antonio, TX 78227; and §Channing Laboratory, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115 Communicated by Richard M. Krause, National Institutes of Health, Bethesda, MD, September 1, 2006 (received for review July 20, 2006) The molecular basis of pathogen clone emergence is relatively frequency and severity of serotype M3 invasive infections (3). poorly understood. Acquisition of a bacteriophage encoding a Humans with GAS infections seroconvert to SlaA, indicating previously unknown secreted phospholipase A2 (designated SlaA) that this protein is made during infection (3). In addition, SlaA has been implicated in the rapid emergence in the mid-1980s of a has enzymatic activity against several phospholipid head groups new hypervirulent clone of serotype M3 group A Streptococcus. and acyl chains located at the sn-2 position (14). For example, Although several lines of circumstantial evidence suggest that SlaA SlaA cleaves and releases arachidonic acid, a potent mediator of is a virulence factor, this issue has not been addressed experimen- the inflammatory cascade. tally. We found that an isogenic ⌬slaA mutant strain was signifi- With the goal of directly testing the hypothesis that SlaA cantly impaired in ability to adhere to and kill human epithelial cells contributes to pathogenesis, we made a ⌬slaA isogenic mutant compared with the wild-type parental strain. -
Application of Various Molecular Modelling Methods in the Study of Estrogens and Xenoestrogens
International Journal of Molecular Sciences Review Application of Various Molecular Modelling Methods in the Study of Estrogens and Xenoestrogens Anna Helena Mazurek 1 , Łukasz Szeleszczuk 1,* , Thomas Simonson 2 and Dariusz Maciej Pisklak 1 1 Chair and Department of Physical Pharmacy and Bioanalysis, Department of Physical Chemistry, Medical Faculty of Pharmacy, University of Warsaw, Banacha 1 str., 02-093 Warsaw Poland; [email protected] (A.H.M.); [email protected] (D.M.P.) 2 Laboratoire de Biochimie (CNRS UMR7654), Ecole Polytechnique, 91-120 Palaiseau, France; [email protected] * Correspondence: [email protected]; Tel.: +48-501-255-121 Received: 21 July 2020; Accepted: 1 September 2020; Published: 3 September 2020 Abstract: In this review, applications of various molecular modelling methods in the study of estrogens and xenoestrogens are summarized. Selected biomolecules that are the most commonly chosen as molecular modelling objects in this field are presented. In most of the reviewed works, ligand docking using solely force field methods was performed, employing various molecular targets involved in metabolism and action of estrogens. Other molecular modelling methods such as molecular dynamics and combined quantum mechanics with molecular mechanics have also been successfully used to predict the properties of estrogens and xenoestrogens. Among published works, a great number also focused on the application of different types of quantitative structure–activity relationship (QSAR) analyses to examine estrogen’s structures and activities. Although the interactions between estrogens and xenoestrogens with various proteins are the most commonly studied, other aspects such as penetration of estrogens through lipid bilayers or their ability to adsorb on different materials are also explored using theoretical calculations.