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Weng Q, Zhang R, Wu P, Chen J, Pan X, Zheng C, Zhao D, Wang J, Zhang H, Qi X, Han J, Lu Z, Zhou B. Occurrence and Exposure Assessment of Lipophilic Shellfish Toxins in the Zhejiang Province, China. Mar Drugs 2024; 22:239. [PMID: 38921550 PMCID: PMC11205204 DOI: 10.3390/md22060239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/27/2024] Open
Abstract
Although lipophilic shellfish toxins (LSTs) pose a significant threat to the health of seafood consumers, their systematic investigation and risk assessment remain scarce. The goals of this study were as follows: (1) analyze LST levels in commercially available shellfish in Zhejiang province, China, and determine factors influencing LST distribution; (2) assess the acute dietary risk of exposure to LSTs for local consumers during the red tide period; (3) explore potential health risks of LSTs in humans; and (4) study the acute risks of simultaneous dietary exposure to LSTs and paralytic shellfish toxins (PSTs). A total of 546 shellfish samples were collected. LSTs were detected in 89 samples (16.3%) at concentrations below the regulatory limits. Mussels were the main shellfish species contaminated with LSTs. Spatial variations were observed in the yessotoxin group. Acute exposure to LSTs based on multiple scenarios was low. The minimum tolerable exposure durations for LSTs calculated using the mean and the 95th percentile of consumption data were 19.7 and 4.9 years, respectively. Our findings showed that Zhejiang province residents are at a low risk of combined exposure to LSTs and PSTs; however, the risk may be higher for children under 6 years of age in the extreme scenario.
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Affiliation(s)
- Qin Weng
- School of Public Health, Hangzhou Medical College, Hangzhou 310013, China; (Q.W.); (Z.L.)
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Ronghua Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Pinggu Wu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Jiang Chen
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Xiaodong Pan
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Chenyang Zheng
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Dong Zhao
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Jikai Wang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Hexiang Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Xiaojuan Qi
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Junde Han
- Department of Epidemiology and Health Statistics, School of Public Health, Faculty of Medicine, Hangzhou Normal University, Hangzhou 311121, China;
| | - Zijie Lu
- School of Public Health, Hangzhou Medical College, Hangzhou 310013, China; (Q.W.); (Z.L.)
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Biao Zhou
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
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2
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Vepřek NA, Cooper MH, Laprell L, Yang EJN, Folkerts S, Bao R, Boczkowska M, Palmer NJ, Dominguez R, Oertner TG, Pon LA, Zuchero JB, Trauner DH. Optical Control of G-Actin with a Photoswitchable Latrunculin. J Am Chem Soc 2024; 146:8895-8903. [PMID: 38511265 PMCID: PMC11302737 DOI: 10.1021/jacs.3c10776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Actin is one of the most abundant proteins in eukaryotic cells and is a key component of the cytoskeleton. A range of small molecules has emerged that interfere with actin dynamics by either binding to polymeric F-actin or monomeric G-actin to stabilize or destabilize filaments or prevent their formation and growth, respectively. Among these, the latrunculins, which bind to G-actin and affect polymerization, are widely used as tools to investigate actin-dependent cellular processes. Here, we report a photoswitchable version of latrunculin, termed opto-latrunculin (OptoLat), which binds to G-actin in a light-dependent fashion and affords optical control over actin polymerization. OptoLat can be activated with 390-490 nm pulsed light and rapidly relaxes to its inactive form in the dark. Light activated OptoLat induced depolymerization of F-actin networks in oligodendrocytes and budding yeast, as shown by fluorescence microscopy. Subcellular control of actin dynamics in human cancer cell lines was demonstrated via live cell imaging. Light-activated OptoLat also reduced microglia surveillance in organotypic mouse brain slices while ramification was not affected. Incubation in the dark did not alter the structural and functional integrity of the microglia. Together, our data demonstrate that OptoLat is a useful tool for the elucidation of G-actin dependent dynamic processes in cells and tissues.
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Affiliation(s)
- Nynke A. Vepřek
- Department of Chemistry, New York University, New York, NY 10003, USA
- Department of Chemistry, Ludwig Maximilian University, D-80539 Munich, Germany
| | - Madeline H. Cooper
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Laura Laprell
- Institute for Synaptic Physiology, ZMNH, University Medical Center Hamburg-Eppendorf, D-20251 Hamburg, Germany
| | - Emily Jie-Ning Yang
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Sander Folkerts
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Ruiyang Bao
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Malgorzata Boczkowska
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nicholas J. Palmer
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Roberto Dominguez
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Thomas G. Oertner
- Institute for Synaptic Physiology, ZMNH, University Medical Center Hamburg-Eppendorf, D-20251 Hamburg, Germany
| | - Liza A. Pon
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - J. Bradley Zuchero
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Dirk H. Trauner
- Department of Chemistry, New York University, New York, NY 10003, USA
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
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3
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Iqbal A, Aslam S, Ahmed M, Khan F, Ali Q, Han S. Role of Actin Dynamics and GhACTIN1 Gene in Cotton Fiber Development: A Prototypical Cell for Study. Genes (Basel) 2023; 14:1642. [PMID: 37628693 PMCID: PMC10454433 DOI: 10.3390/genes14081642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/13/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
Cotton crop is considered valuable for its fiber and seed oil. Cotton fiber is a single-celled outgrowth from the ovule epidermis, and it is a very dynamic cell for study. It has four distinct but overlapping developmental stages: initiation, elongation, secondary cell wall synthesis, and maturation. Among the various qualitative characteristics of cotton fiber, the important ones are the cotton fiber staple length, tensile strength, micronaire values, and fiber maturity. Actin dynamics are known to play an important role in fiber elongation and maturation. The current review gives an insight into the cotton fiber developmental stages, the qualitative traits associated with cotton fiber, and the set of genes involved in regulating these developmental stages and fiber traits. This review also highlights some prospects for how biotechnological approaches can improve cotton fiber quality.
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Affiliation(s)
- Adnan Iqbal
- School of Biological Sciences and Technology, Liupanshui Normal University, Liupanshui 553004, China;
- Plant Breeding and Acclimatization Institute—National Research Institute, Radzikow, 05-870 Blonie, Poland
| | - Sibgha Aslam
- Plant Breeding and Acclimatization Institute—National Research Institute, Radzikow, 05-870 Blonie, Poland
| | - Mukhtar Ahmed
- Government Boys College Sokasan, Higher Education Department, Azad Jammu and Kashmir, Bhimber 10040, Pakistan
| | - Fahad Khan
- Department of Plant Protection, Faculty of Agricultural Sciences, Ghazi University, Dera Ghazi Khan 33001, Pakistan
| | - Qurban Ali
- Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences, University of the Punjab, Lahore 54590, Pakistan
| | - Shiming Han
- School of Biological Sciences and Technology, Liupanshui Normal University, Liupanshui 553004, China;
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4
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Ayache N, Bill BD, Brosnahan ML, Campbell L, Deeds JR, Fiorendino JM, Gobler CJ, Handy SM, Harrington N, Kulis DM, McCarron P, Miles CO, Moore SK, Nagai S, Trainer VL, Wolny JL, Young CS, Smith JL. A survey of Dinophysis spp. and their potential to cause diarrhetic shellfish poisoning in coastal waters of the United States. JOURNAL OF PHYCOLOGY 2023; 59:658-680. [PMID: 36964950 DOI: 10.1111/jpy.13331] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 02/22/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
Multiple species of the genus Dinophysis produce diarrhetic shellfish toxins (okadaic acid and Dinophysis toxins, OA/DTXs analogs) and/or pectenotoxins (PTXs). Only since 2008 have DSP events (illnesses and/or shellfish harvesting closures) become recognized as a threat to human health in the United States. This study characterized 20 strains representing five species of Dinophysis spp. isolated from three US coastal regions that have experienced DSP events: the Northeast/Mid-Atlantic, the Gulf of Mexico, and the Pacific Northwest. Using a combination of morphometric and DNA-based evidence, seven Northeast/Mid-Atlantic isolates and four Pacific Northwest isolates were classified as D. acuminata, a total of four isolates from two coasts were classified as D. norvegica, two isolates from the Pacific Northwest coast were identified as D. fortii, and three isolates from the Gulf of Mexico were identified as D. ovum and D. caudata. Toxin profiles of D. acuminata and D. norvegica varied by their geographical origin within the United States. Cross-regional comparison of toxin profiles was not possible with the other three species; however, within each region, distinct species-conserved profiles for isolates of D. fortii, D. ovum, and D. caudata were observed. Historical and recent data from various State and Tribal monitoring programs were compiled and compared, including maximum recorded cell abundances of Dinophysis spp., maximum concentrations of OA/DTXs recorded in commercial shellfish species, and durations of harvesting closures, to provide perspective regarding potential for DSP impacts to regional public health and shellfish industry.
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Affiliation(s)
- Nour Ayache
- Virginia Institute of Marine Science, William & Mary, Gloucester Point, Virginia, 23062, USA
| | - Brian D Bill
- Environmental and Fisheries Science Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Seattle, Washington, 98112, USA
| | - Michael L Brosnahan
- Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, 02543, USA
| | - Lisa Campbell
- Department of Oceanography and Department of Biology, Texas A&M University, College Station, Texas, 77843, USA
- Department of Biology, Texas A&M University, College Station, Texas, 77843, USA
| | - Jonathan R Deeds
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, Maryland, 20740, USA
| | - James M Fiorendino
- Department of Oceanography and Department of Biology, Texas A&M University, College Station, Texas, 77843, USA
| | - Christopher J Gobler
- School of Marine and Atmospheric Sciences, Stony Brook University, Southampton, New York, 11968, USA
| | - Sara M Handy
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, Maryland, 20740, USA
| | - Neil Harrington
- Department of Natural Resources, Jamestown S'Klallam Tribe, Sequim, Washington, 98382, USA
| | - David M Kulis
- Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, 02543, USA
| | - Pearse McCarron
- Biotoxin Metrology, National Research Council Canada, Halifax, Nova Scotia, B3H 3Z1, Canada
| | - Christopher O Miles
- Biotoxin Metrology, National Research Council Canada, Halifax, Nova Scotia, B3H 3Z1, Canada
| | - Stephanie K Moore
- Conservation Biology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Seattle, Washington, 98112, USA
| | - Satoshi Nagai
- Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Kanazawa, Yokohama, Kanagawa, 236-8648, Japan
| | - Vera L Trainer
- Olympic Natural Resources Center, School of Environmental and Forest Sciences, University of Washington, Box 352100, Seattle, Washington, 98195, USA
| | - Jennifer L Wolny
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, Maryland, 20740, USA
| | - Craig S Young
- School of Marine and Atmospheric Sciences, Stony Brook University, Southampton, New York, 11968, USA
| | - Juliette L Smith
- Virginia Institute of Marine Science, William & Mary, Gloucester Point, Virginia, 23062, USA
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5
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Vepřek NA, Cooper MH, Laprell L, Yang EJN, Folkerts S, Bao R, Oertner TG, Pon LA, Zuchero JB, Trauner DH. Optical Control of G-Actin with a Photoswitchable Latrunculin. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.17.549222. [PMID: 37502978 PMCID: PMC10370057 DOI: 10.1101/2023.07.17.549222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Actin is one of the most abundant proteins in eukaryotic cells and a key component of the cytoskeleton. A range of small molecules have emerged that interfere with actin dynamics by either binding to polymeric F-actin or monomeric G-actin to stabilize or destabilize filaments or prevent their formation and growth, respectively. Amongst these, the latrunculins, which bind to G-actin and affect polymerization, are widely used as tools to investigate actin-dependent cellular processes. Here, we report a photoswitchable version of latrunculin, termed opto-latrunculin (OptoLat), which binds to G-actin in a light-dependent fashion and affords optical control over actin polymerization. OptoLat can be activated with 390 - 490 nm pulsed light and rapidly relaxes to the inactive form in the dark. Light activated OptoLat induced depolymerization of F-actin networks in oligodendrocytes and budding yeast, as shown by fluorescence microscopy. Subcellular control of actin dynamics in human cancer cell lines was demonstrated by live cell imaging. Light-activated OptoLat also reduced microglia surveillance in organotypic mouse brain slices while ramification was not affected. Incubation in the dark did not alter the structural and functional integrity of microglia. Together, our data demonstrate that OptoLat is a useful tool for the elucidation of G-actin dependent dynamic processes in cells and tissues.
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Affiliation(s)
- Nynke A Vepřek
- Department of Chemistry, New York University, New York, NY 10003, USA
- Department of Chemistry, Ludwig Maximilian University, D-80539 Munich, Germany
| | - Madeline H Cooper
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Laura Laprell
- Institute for Synaptic Physiology, ZMNH, University Medical Center Hamburg-Eppendorf, D-20251 Hamburg, Germany
| | - Emily Jie-Ning Yang
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Sander Folkerts
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Ruiyang Bao
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Thomas G Oertner
- Institute for Synaptic Physiology, ZMNH, University Medical Center Hamburg-Eppendorf, D-20251 Hamburg, Germany
| | - Liza A Pon
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - J Bradley Zuchero
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Dirk H Trauner
- Department of Chemistry, New York University, New York, NY 10003, USA
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
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6
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Dans MG, Piirainen H, Nguyen W, Khurana S, Mehra S, Razook Z, Geoghegan ND, Dawson AT, Das S, Parkyn Schneider M, Jonsdottir TK, Gabriela M, Gancheva MR, Tonkin CJ, Mollard V, Goodman CD, McFadden GI, Wilson DW, Rogers KL, Barry AE, Crabb BS, de Koning-Ward TF, Sleebs BE, Kursula I, Gilson PR. Sulfonylpiperazine compounds prevent Plasmodium falciparum invasion of red blood cells through interference with actin-1/profilin dynamics. PLoS Biol 2023; 21:e3002066. [PMID: 37053271 PMCID: PMC10128974 DOI: 10.1371/journal.pbio.3002066] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 04/25/2023] [Accepted: 03/06/2023] [Indexed: 04/15/2023] Open
Abstract
With emerging resistance to frontline treatments, it is vital that new antimalarial drugs are identified to target Plasmodium falciparum. We have recently described a compound, MMV020291, as a specific inhibitor of red blood cell (RBC) invasion, and have generated analogues with improved potency. Here, we generated resistance to MMV020291 and performed whole genome sequencing of 3 MMV020291-resistant populations. This revealed 3 nonsynonymous single nucleotide polymorphisms in 2 genes; 2 in profilin (N154Y, K124N) and a third one in actin-1 (M356L). Using CRISPR-Cas9, we engineered these mutations into wild-type parasites, which rendered them resistant to MMV020291. We demonstrate that MMV020291 reduces actin polymerisation that is required by the merozoite stage parasites to invade RBCs. Additionally, the series inhibits the actin-1-dependent process of apicoplast segregation, leading to a delayed death phenotype. In vitro cosedimentation experiments using recombinant P. falciparum proteins indicate that potent MMV020291 analogues disrupt the formation of filamentous actin in the presence of profilin. Altogether, this study identifies the first compound series interfering with the actin-1/profilin interaction in P. falciparum and paves the way for future antimalarial development against the highly dynamic process of actin polymerisation.
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Affiliation(s)
- Madeline G Dans
- Burnet Institute, Melbourne, Victoria, Australia
- School of Medicine and Institute for Mental and Physical Health and Clinical Translation, Deakin University, Waurn Ponds, Victoria, Australia
- Walter and Eliza Hall Institute, Parkville, Victoria, Australia
| | - Henni Piirainen
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - William Nguyen
- Walter and Eliza Hall Institute, Parkville, Victoria, Australia
| | - Sachin Khurana
- Walter and Eliza Hall Institute, Parkville, Victoria, Australia
| | - Somya Mehra
- Burnet Institute, Melbourne, Victoria, Australia
| | - Zahra Razook
- Burnet Institute, Melbourne, Victoria, Australia
- School of Medicine and Institute for Mental and Physical Health and Clinical Translation, Deakin University, Waurn Ponds, Victoria, Australia
| | | | | | - Sujaan Das
- Ludwig Maximilian University, Faculty of Veterinary Medicine, Munich, Germany
| | | | - Thorey K Jonsdottir
- Burnet Institute, Melbourne, Victoria, Australia
- Department of Microbiology and Immunology, The University of Melbourne, Parkville, Victoria, Australia
| | - Mikha Gabriela
- Burnet Institute, Melbourne, Victoria, Australia
- School of Medicine and Institute for Mental and Physical Health and Clinical Translation, Deakin University, Waurn Ponds, Victoria, Australia
| | - Maria R Gancheva
- Research Centre for Infectious Diseases, The University of Adelaide, Adelaide, Australia
| | | | - Vanessa Mollard
- School of Biosciences, The University of Melbourne, Parkville, Victoria, Australia
| | | | - Geoffrey I McFadden
- School of Biosciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Danny W Wilson
- Research Centre for Infectious Diseases, The University of Adelaide, Adelaide, Australia
| | - Kelly L Rogers
- Walter and Eliza Hall Institute, Parkville, Victoria, Australia
| | - Alyssa E Barry
- Burnet Institute, Melbourne, Victoria, Australia
- School of Medicine and Institute for Mental and Physical Health and Clinical Translation, Deakin University, Waurn Ponds, Victoria, Australia
| | - Brendan S Crabb
- Burnet Institute, Melbourne, Victoria, Australia
- Department of Microbiology and Immunology, The University of Melbourne, Parkville, Victoria, Australia
| | - Tania F de Koning-Ward
- School of Medicine and Institute for Mental and Physical Health and Clinical Translation, Deakin University, Waurn Ponds, Victoria, Australia
| | - Brad E Sleebs
- Walter and Eliza Hall Institute, Parkville, Victoria, Australia
| | - Inari Kursula
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Paul R Gilson
- Burnet Institute, Melbourne, Victoria, Australia
- Department of Microbiology and Immunology, The University of Melbourne, Parkville, Victoria, Australia
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7
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Gaillard S, Réveillon D, Mason PL, Ayache N, Sanderson M, Smith JL, Giddings S, McCarron P, Séchet V, Hégaret H, Hess P, Vogelbein WK. Mortality and histopathology in sheepshead minnow (Cyprinodon variegatus) larvae exposed to pectenotoxin-2 and Dinophysis acuminata. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 257:106456. [PMID: 36889127 DOI: 10.1016/j.aquatox.2023.106456] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 02/16/2023] [Accepted: 02/19/2023] [Indexed: 06/18/2023]
Abstract
Toxic species of the dinoflagellate genus Dinophysis can produce diarrheic toxins including okadaic acid (OA) and dinophysistoxins (DTXs), and the non-diarrheic pectenotoxins (PTXs). Okadaic acid and DTXs cause diarrheic shellfish poisoning (DSP) in human consumers, and also cause cytotoxic, immunotoxic and genotoxic effects in a variety of mollusks and fishes at different life stages in vitro. The possible effects of co-produced PTXs or live cells of Dinophysis to aquatic organisms, however, are less understood. Effects on an early life stage of sheepshead minnow (Cyprinodon variegatus), a common finfish in eastern USA estuaries, were evaluated using a 96-h toxicity bioassay. Three-week old larvae were exposed to PTX2 concentrations from 50 to 4000 nM, live Dinophysis acuminata culture (strain DAVA01), live cells resuspended in clean medium or culture filtrate. This D. acuminata strain produced mainly intracellular PTX2 (≈ 21 pg cell-1), with much lower levels of OA and dinophysistoxin-1. No mortality or gill damages were observed in larvae exposed to D. acuminata (from 5 to 5500 cells mL-1), resuspended cells and culture filtrate. However, exposure to purified PTX2 at intermediate to high concentrations (from 250 to 4000 nM) resulted in 8 to 100% mortality after 96 h (24-h LC50 of 1231 nM). Histopathology and transmission electron microscopy of fish exposed to intermediate to high PTX2 concentrations revealed important gill damage, including intercellular edema, necrosis and sloughing of gill respiratory epithelia, and damage to the osmoregulatory epithelium, including hypertrophy, proliferation, redistribution and necrosis of chloride cells. Tissue damage in gills is likely caused by the interaction of PTX2 with the actin cytoskeleton of the affected gill epithelia. Overall, the severe gill pathology observed following the PTX2 exposure suggested death was due to loss of respiratory and osmoregulatory functions in C. variegatus larvae.
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Affiliation(s)
- S Gaillard
- Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, United States of America; IFREMER, PHYTOX unit, F-44000 Nantes, France.
| | - D Réveillon
- IFREMER, PHYTOX unit, F-44000 Nantes, France
| | - P L Mason
- Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, United States of America
| | - N Ayache
- Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, United States of America
| | - M Sanderson
- Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, United States of America
| | - J L Smith
- Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, United States of America
| | - S Giddings
- Biotoxin Metrology, National Research Council Canada, 1411 Oxford Street, Nova Scotia, Halifax B3H 3Z1, Canada
| | - P McCarron
- Biotoxin Metrology, National Research Council Canada, 1411 Oxford Street, Nova Scotia, Halifax B3H 3Z1, Canada
| | - V Séchet
- IFREMER, PHYTOX unit, F-44000 Nantes, France
| | - H Hégaret
- Laboratoire des Sciences de l'Environnement Marin (UMR6539 CNRS/UBO/IFREMER/IRD), Institut Universitaire Européen de la Mer, Technopôle Brest-Iroise, Plouzané 29280, France
| | - P Hess
- IFREMER, PHYTOX unit, F-44000 Nantes, France
| | - W K Vogelbein
- Virginia Institute of Marine Science, William & Mary, P.O. Box 1346, Gloucester Point, VA 23062, United States of America
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8
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Küllmer F, Vepřek NA, Borowiak M, Nasufović V, Barutzki S, Thorn-Seshold O, Arndt HD, Trauner D. Next Generation Opto-Jasplakinolides Enable Local Remodeling of Actin Networks. Angew Chem Int Ed Engl 2022; 61:e202210220. [PMID: 36048143 PMCID: PMC11256906 DOI: 10.1002/anie.202210220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Indexed: 11/12/2022]
Abstract
The natural product jasplakinolide is widely used to stabilize F-actin. Based on extensive structure-activity relationship studies, we have developed a new generation of photoswitchable jasplakinolides that feature rationally designed red-shifted azobenzene photoswitches. Our lead compound, nOJ, can be activated with longer wavelengths in the visible range (e.g. 440-475 nm) and rapidly returns to its inactive state through thermal relaxation. nOJ enables the reversible control of F-actin dynamics, as shown through live-cell imaging, cell migration, and cell proliferation assays. Short, local irradiation with blue light resulted in highly localized and reversible actin aggregation with subcellular precision. Our optical tool can be useful in diverse fields to study actin dynamics with excellent spatiotemporal resolution.
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Affiliation(s)
- Florian Küllmer
- Friedrich-Schiller-Universität (FSU), Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstr. 10, 07743, Jena, Germany
| | - Nynke A Vepřek
- New York University, Department of Chemistry, 100 Washington Square East, New York, NY 10003, USA
- Department of Chemistry, Ludwig Maximilian University of Munich, Butenandtstrasse 5-13, 81377, München, Germany
| | - Malgorzata Borowiak
- Department of Pharmacy, Ludwig Maximilian University of Munich, Butenandtstrasse 5-13, 81377, München, Germany
| | - Veselin Nasufović
- Friedrich-Schiller-Universität (FSU), Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstr. 10, 07743, Jena, Germany
| | - Sebastian Barutzki
- Friedrich-Schiller-Universität (FSU), Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstr. 10, 07743, Jena, Germany
| | - Oliver Thorn-Seshold
- Department of Pharmacy, Ludwig Maximilian University of Munich, Butenandtstrasse 5-13, 81377, München, Germany
| | - Hans-Dieter Arndt
- Friedrich-Schiller-Universität (FSU), Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstr. 10, 07743, Jena, Germany
| | - Dirk Trauner
- New York University, Department of Chemistry, 100 Washington Square East, New York, NY 10003, USA
- Department of Chemistry University of Pennsylvania, 231 South 34th St., Philadelphia, PA 19104-6323, USA
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9
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Louzao MC, Vilariño N, Vale C, Costas C, Cao A, Raposo-Garcia S, Vieytes MR, Botana LM. Current Trends and New Challenges in Marine Phycotoxins. Mar Drugs 2022; 20:md20030198. [PMID: 35323497 PMCID: PMC8950113 DOI: 10.3390/md20030198] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/04/2022] [Accepted: 03/05/2022] [Indexed: 02/04/2023] Open
Abstract
Marine phycotoxins are a multiplicity of bioactive compounds which are produced by microalgae and bioaccumulate in the marine food web. Phycotoxins affect the ecosystem, pose a threat to human health, and have important economic effects on aquaculture and tourism worldwide. However, human health and food safety have been the primary concerns when considering the impacts of phycotoxins. Phycotoxins toxicity information, often used to set regulatory limits for these toxins in shellfish, lacks traceability of toxicity values highlighting the need for predefined toxicological criteria. Toxicity data together with adequate detection methods for monitoring procedures are crucial to protect human health. However, despite technological advances, there are still methodological uncertainties and high demand for universal phycotoxin detectors. This review focuses on these topics, including uncertainties of climate change, providing an overview of the current information as well as future perspectives.
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Affiliation(s)
- Maria Carmen Louzao
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
- Correspondence: (M.C.L.); (L.M.B.)
| | - Natalia Vilariño
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Carmen Vale
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Celia Costas
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Alejandro Cao
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Sandra Raposo-Garcia
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
| | - Mercedes R. Vieytes
- Departamento de Fisiologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain;
| | - Luis M. Botana
- Departamento de Farmacologia, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (N.V.); (C.V.); (C.C.); (A.C.); (S.R.-G.)
- Correspondence: (M.C.L.); (L.M.B.)
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10
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Leyva V, Maruenda H. Assessment of the Presence of Lipophilic Phycotoxins in Scallops (Argopecten purpuratus) Farmed along Peruvian Coastal Waters. J Food Prot 2021; 84:204-212. [PMID: 32977333 DOI: 10.4315/jfp-20-212] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 09/14/2020] [Indexed: 11/11/2022]
Abstract
ABSTRACT Some harmful algal blooms produce lipophilic marine biotoxins (LMTs) such as okadaic acid (OA; and its analogs dinophysistoxins [DTXs]), yessotoxins (YTXs), pectenotoxins (PTXs), and azaspiracids (AZAs), all of which may accumulate in filter-feeding bivalve mollusks. European health regulations stipulate a limit of 160 μg/kg for OA or DTXs, PTXs, and AZAs and 3.75 mg/kg for YTXs. Argopecten purpuratus is a valuable commercial marine bivalve exploited in Peru. Despite its importance and the periodic reports of the presence of harmful algal blooms in Peruvian coastal waters, information regarding potential contamination of these scallops by LMTs is lacking. We evaluated LMTs in 115 samples of A. purpuratus collected between November 2013 and March 2015 from 18 production areas distributed along the Peruvian coast. The hepatopancreas, which accumulates most of the toxins in the scallop, was analyzed with liquid chromatography-tandem mass spectrometry to quantify OA in its free form, YTX, AZA-1, and PTX-2. Baseline separation was achieved in 19 min. Linearity (R2 > 0.997), precision (coefficient of variation < 15%), and limits of quantification (0.155 to 0.479 ng/mL) were satisfactory. YTX was found in 72 samples, and PTX-2 was found in 17 samples, but concentrations of both biotoxins were below the regulatory limits. Free OA and AZA-1 were not detected in the scallop samples. This atypical profile (i.e., presence of PTX-2 and absence of OA) may be linked to the presence of the dinoflagellate Dinophysis acuminata. The production of YTX could be associated with the phytoplankton Gonyaulax spinifera and Protoceratium reticulatum. This is the first systematic assessment of the four types of LMTs in shellfish from Peruvian coastal waters. The results suggest low prevalence of LMTs in Peruvian bay scallops but support continued surveillance and analysis of LMTs in Peru. HIGHLIGHTS
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Affiliation(s)
- Vanessa Leyva
- Departamento de Ciencias-Química, Pontificia Universidad Católica del Perú, Av. Universitaria 1801, Lima 32, Peru´
| | - Helena Maruenda
- Departamento de Ciencias-Química, Pontificia Universidad Católica del Perú, Av. Universitaria 1801, Lima 32, Peru´.,(ORCID: https://orcid.org/0000-0002-4714-156X [H.M.])
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11
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Cho K, Heo J, Han J, Hong HD, Jeon H, Hwang HJ, Hong CY, Kim D, Han JW, Baek K. Industrial Applications of Dinoflagellate Phycotoxins Based on Their Modes of Action: A Review. Toxins (Basel) 2020; 12:E805. [PMID: 33353166 PMCID: PMC7766252 DOI: 10.3390/toxins12120805] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/15/2020] [Accepted: 12/15/2020] [Indexed: 11/24/2022] Open
Abstract
Dinoflagellates are an important group of phytoplanktons, characterized by two dissimilar flagella and distinctive features of both plants and animals. Dinoflagellate-generated harmful algal blooms (HABs) and associated damage frequently occur in coastal areas, which are concomitant with increasing eutrophication and climate change derived from anthropogenic waste and atmospheric carbon dioxide, respectively. The severe damage and harmful effects of dinoflagellate phycotoxins in the fishing industry have been recognized over the past few decades, and the management and monitoring of HABs have attracted much attention, leaving aside the industrial application of their valuable toxins. Specific modes of action of the organisms' toxins can effectively be utilized for producing beneficial materials, such as Botox and other therapeutic agents. This review aims to explore the potential industrial applications of marine dinoflagellate phycotoxins; furthermore, this review focuses on their modes of action and summarizes the available knowledge on them.
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Affiliation(s)
- Kichul Cho
- Department of Applied Marine Bioresource Science, National Marine Biodiversity Institute of Korea (MABIK), Seocheon-gun, Chungchungnam-do 33662, Korea; (K.C.); (J.H.); (H.D.H.); (H.J.); (H.-J.H.); (K.B.)
| | - Jina Heo
- Growth Engine Research Department, Chungbuk Research Institute (CRI), Chungju, Chungchungbuk-do 28517, Korea;
| | - Jinwook Han
- Department of Applied Marine Bioresource Science, National Marine Biodiversity Institute of Korea (MABIK), Seocheon-gun, Chungchungnam-do 33662, Korea; (K.C.); (J.H.); (H.D.H.); (H.J.); (H.-J.H.); (K.B.)
| | - Hyun Dae Hong
- Department of Applied Marine Bioresource Science, National Marine Biodiversity Institute of Korea (MABIK), Seocheon-gun, Chungchungnam-do 33662, Korea; (K.C.); (J.H.); (H.D.H.); (H.J.); (H.-J.H.); (K.B.)
| | - Hancheol Jeon
- Department of Applied Marine Bioresource Science, National Marine Biodiversity Institute of Korea (MABIK), Seocheon-gun, Chungchungnam-do 33662, Korea; (K.C.); (J.H.); (H.D.H.); (H.J.); (H.-J.H.); (K.B.)
| | - Hyun-Ju Hwang
- Department of Applied Marine Bioresource Science, National Marine Biodiversity Institute of Korea (MABIK), Seocheon-gun, Chungchungnam-do 33662, Korea; (K.C.); (J.H.); (H.D.H.); (H.J.); (H.-J.H.); (K.B.)
| | - Chang-Yu Hong
- Department of Environmental and Urban Research, Jeju Research Institute, Jeju-si, Jeju-do 63147, Korea;
| | - Daekyung Kim
- Daegu Center, Korea Basic Science Institute (KBSI), Daegu, Gyeongsangbuk-do 41566, Korea
| | - Jong Won Han
- Department of Applied Marine Bioresource Science, National Marine Biodiversity Institute of Korea (MABIK), Seocheon-gun, Chungchungnam-do 33662, Korea; (K.C.); (J.H.); (H.D.H.); (H.J.); (H.-J.H.); (K.B.)
| | - Kyunghwa Baek
- Department of Applied Marine Bioresource Science, National Marine Biodiversity Institute of Korea (MABIK), Seocheon-gun, Chungchungnam-do 33662, Korea; (K.C.); (J.H.); (H.D.H.); (H.J.); (H.-J.H.); (K.B.)
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12
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Varghese S, Rahmani R, Drew DR, Beeson JG, Baum J, Smith BJ, Baell JB. Structure-Activity Studies of Truncated Latrunculin Analogues with Antimalarial Activity. ChemMedChem 2020; 16:679-693. [PMID: 32929894 DOI: 10.1002/cmdc.202000399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/08/2020] [Indexed: 11/09/2022]
Abstract
Malarial parasites employ actin dynamics for motility, and any disruption to these dynamics renders the parasites unable to effectively establish infection. Therefore, actin presents a potential target for malarial drug discovery, and naturally occurring actin inhibitors such as latrunculins are a promising starting point. However, the limited availability of the natural product and the laborious route for synthesis of latrunculins have hindered their potential development as drug candidates. In this regard, we recently described novel truncated latrunculins, with superior actin binding potency and selectivity towards P. falciparum actin than the canonical latrunculin B. In this paper, we further explore the truncated latrunculin core to summarize the SAR for inhibition of malaria motility. This study helps further understand the binding pattern of these analogues in order to develop them as drug candidates for malaria.
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Affiliation(s)
- Swapna Varghese
- La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia.,Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Raphaël Rahmani
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Damien R Drew
- Burnet Institute 85 Commercial Road, Melbourne, Victoria 3004, Australia
| | - James G Beeson
- Burnet Institute 85 Commercial Road, Melbourne, Victoria 3004, Australia.,Central Clinical School and Department of Microbiology, Monash University, Melbourne, Victoria 3004, Australia
| | - Jake Baum
- Walter and Eliza Hall Institute, 1G Royal Parade, Parkville, Victoria 3052, Australia.,Department of Life Sciences, Imperial College London, South Kensington, SW7 2AZ, UK
| | - Brian J Smith
- La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Jonathan B Baell
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.,Australian Translational Medicinal Chemistry Facility (ATMCF), Monash University, Parkville, Victoria 3052, Australia.,ARC Centre for Fragment-Based Design, Monash University, Parkville, Victoria 3052, Australia
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13
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Gaillard S, Le Goïc N, Malo F, Boulais M, Fabioux C, Zaccagnini L, Carpentier L, Sibat M, Réveillon D, Séchet V, Hess P, Hégaret H. Cultures of Dinophysis sacculus, D. acuminata and pectenotoxin 2 affect gametes and fertilization success of the Pacific oyster, Crassostrea gigas. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 265:114840. [PMID: 32570022 DOI: 10.1016/j.envpol.2020.114840] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 05/15/2020] [Accepted: 05/16/2020] [Indexed: 06/11/2023]
Abstract
Harmful algal blooms (HABs) of toxic species of the dinoflagellate genus Dinophysis are a threat to human health as they are mainly responsible for diarrheic shellfish poisoning (DSP) in the consumers of contaminated shellfish. Such contamination leads to shellfish farm closures causing major economic and social issues. The direct effects of numerous HAB species have been demonstrated on adult bivalves, whereas the effects on critical early life stages remain relatively unexplored. The present study aimed to determine the in vitro effects of either cultivated strains of D. sacculus and D. acuminata isolated from France or their associated toxins (i.e. okadaic acid (OA) and pectenotoxin 2 (PTX2)) on the quality of the gametes of the Pacific oyster Crassostrea gigas. This was performed by assessing the ROS production and viability of the gametes using flow cytometry, and fertilization success using microscopic counts. Oocytes were more affected than spermatozoa and their mortality and ROS production increased in the presence of D. sacculus and PTX2, respectively. A decrease in fertilization success was observed at concentrations as low as 0.5 cell mL-1 of Dinophysis spp. and 5 nM of PTX2, whereas no effect of OA could be observed. The effect on fertilization success was higher when both gamete types were concomitantly exposed compared to separate exposures, suggesting a synergistic effect. Our results also suggest that the effects could be due to cell-to-cell contact. These results highlight a potential effect of Dinophysis spp. and PTX2 on reproduction and recruitment of the Pacific oyster.
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Affiliation(s)
- Sylvain Gaillard
- Ifremer, DYNECO, Laboratoire Phycotoxines, F-44000, Nantes, France.
| | - Nelly Le Goïc
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Florent Malo
- Ifremer, DYNECO, Laboratoire Phycotoxines, F-44000, Nantes, France
| | - Myrina Boulais
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Caroline Fabioux
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Lucas Zaccagnini
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | | | - Manoella Sibat
- Ifremer, DYNECO, Laboratoire Phycotoxines, F-44000, Nantes, France
| | - Damien Réveillon
- Ifremer, DYNECO, Laboratoire Phycotoxines, F-44000, Nantes, France
| | - Véronique Séchet
- Ifremer, DYNECO, Laboratoire Phycotoxines, F-44000, Nantes, France
| | - Philipp Hess
- Ifremer, DYNECO, Laboratoire Phycotoxines, F-44000, Nantes, France.
| | - Hélène Hégaret
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France.
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14
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Carazo A, Mladěnka P, Pávek P. Marine Ligands of the Pregnane X Receptor (PXR): An Overview. Mar Drugs 2019; 17:md17100554. [PMID: 31569349 PMCID: PMC6836225 DOI: 10.3390/md17100554] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 09/27/2019] [Accepted: 09/27/2019] [Indexed: 02/06/2023] Open
Abstract
Pregnane X Receptor (PXR) is a ligand-activated transcription factor which binds many structurally different molecules. The receptor is able to regulate the expression of a wide array of genes and is involved in cancer and different key physiological processes such as the metabolism of drugs/xenobiotics and endogenous compounds including lipids and carbohydrates, and inflammation. Algae, sponges, sea squirts, and other marine organisms are some of the species from which structurally new molecules have been isolated that have been subsequently identified in recent decades as ligands for PXR. The therapeutic potential of these natural compounds is promising in different areas and has recently resulted in the registration of trabectedin by the FDA as a novel antineoplastic drug. Apart from being potentially novel drugs, these compounds can also serve as models for the development of new molecules with improved activity. The aim of this review is to succinctly summarize the currently known natural molecules isolated from marine organisms with a proven ability to interact with PXR.
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Affiliation(s)
- Alejandro Carazo
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic.
| | - Přemysl Mladěnka
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic.
| | - Petr Pávek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic.
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15
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Alarcan J, Barbé S, Kopp B, Hessel-Pras S, Braeuning A, Lampen A, Le Hégarat L, Fessard V. Combined effects of okadaic acid and pectenotoxin-2, 13-desmethylspirolide C or yessotoxin in human intestinal Caco-2 cells. CHEMOSPHERE 2019; 228:139-148. [PMID: 31029959 DOI: 10.1016/j.chemosphere.2019.04.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/27/2019] [Accepted: 04/03/2019] [Indexed: 06/09/2023]
Abstract
Lipophilic phycotoxins are secondary metabolites produced by phytoplanktonic species. They accumulate in filtering shellfish and can cause human intoxications. Humans can be exposed to combinations of several phycotoxins. The toxicological effects of phycotoxin mixtures on human health are largely unknown. Published data on phycotoxin co-exposure show that okadaic acid (OA) is simultaneously found with pectenetoxin-2 (PTX-2), 13-desmethylspirolide C (also known as SPX-1), or yessotoxin (YTX). Therefore, the aim of this study was to examine the effects of three binary mixtures, OA/PTX-2, OA/SPX-1 and OA/YTX on human intestinal Caco-2 cells. A multi-parametric approach for cytotoxicity determination was applied using a high-content analysis platform, including markers for cell viability, oxidative stress, inflammation, and DNA damage. Mixtures effects were analyzed using two additivity mathematical models. Our assays revealed that OA induced cytotoxicity, DNA strand breaks and interleukin 8 release. PTX-2 slightly induced DNA strand breaks, whereas SPX-1 and YTX did not affect the investigated endpoints. The combination of OA with another toxin resulted in reduced toxicity at low concentrations, suggesting antagonistic effects, but in increased effects at higher concentrations, suggesting additive or synergistic effects. Taken together, our results demonstrated that the cytotoxic effects of binary mixtures of lipophilic phycotoxins could not be predicted by additivity mathematical models. In conclusion, the present data suggest that combined effects of phycotoxins may occur which might have the potential to impact on risk assessment of these compounds.
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Affiliation(s)
- Jimmy Alarcan
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Fougeres-Laboratory, Toxicology of Contaminants Unit, 10B Rue Claude Bourgelat, 35306, Fougères, France; German Federal Institute for Risk Assessment, Department of Food Safety, Max-Dohrn-Straße 8-10, 10589, Berlin, Germany.
| | - Sabrina Barbé
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Fougeres-Laboratory, Toxicology of Contaminants Unit, 10B Rue Claude Bourgelat, 35306, Fougères, France.
| | - Benjamin Kopp
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Fougeres-Laboratory, Toxicology of Contaminants Unit, 10B Rue Claude Bourgelat, 35306, Fougères, France.
| | - Stefanie Hessel-Pras
- German Federal Institute for Risk Assessment, Department of Food Safety, Max-Dohrn-Straße 8-10, 10589, Berlin, Germany.
| | - Albert Braeuning
- German Federal Institute for Risk Assessment, Department of Food Safety, Max-Dohrn-Straße 8-10, 10589, Berlin, Germany.
| | - Alfonso Lampen
- German Federal Institute for Risk Assessment, Department of Food Safety, Max-Dohrn-Straße 8-10, 10589, Berlin, Germany.
| | - Ludovic Le Hégarat
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Fougeres-Laboratory, Toxicology of Contaminants Unit, 10B Rue Claude Bourgelat, 35306, Fougères, France.
| | - Valérie Fessard
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Fougeres-Laboratory, Toxicology of Contaminants Unit, 10B Rue Claude Bourgelat, 35306, Fougères, France.
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16
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Wang S, Gegenfurtner FA, Crevenna AH, Ziegenhain C, Kliesmete Z, Enard W, Müller R, Vollmar AM, Schneider S, Zahler S. Chivosazole A Modulates Protein-Protein Interactions of Actin. JOURNAL OF NATURAL PRODUCTS 2019; 82:1961-1970. [PMID: 31260301 DOI: 10.1021/acs.jnatprod.9b00335] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Actin is a protein of central importance for many cellular key processes. It is regulated by local interactions with a large number of actin binding proteins (ABPs). Various compounds are known to either increase or decrease the polymerization dynamics of actin. However, no actin binding compound has been developed for clinical applications yet because of selectivity issues. We provide a crystal structure of the natural product chivosazole A (ChivoA) bound to actin and show that-in addition to inhibiting nucleation, polymerization, and severing of F-actin filaments-it selectively modulates binding of ABPs to G-actin: Although unphysiological actin dimers are induced by ChivoA, interaction with gelsolin, profilin, cofilin, and thymosin-β4 is inhibited. Moreover, ChivoA causes transcriptional effects differing from latrunculin B, an actin binder with a different binding site. Our data show that ChivoA and related compounds could serve as scaffolds for the development of actin binding molecules selectively targeting specific actin functions.
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Affiliation(s)
- Shuaijun Wang
- Department of Pharmacy , Ludwig-Maximilians-University , 81377 Munich , Germany
| | | | - Alvaro H Crevenna
- Biomolecular Self-Organization Laboratory , ITQB-Universidade Nova de Lisboa , 2780-157 Oeiras , Portugal
| | - Christoph Ziegenhain
- Department of Biology II , Ludwig-Maximilians-University , 82152 Planegg-Martinsried , Germany
| | - Zane Kliesmete
- Department of Biology II , Ludwig-Maximilians-University , 82152 Planegg-Martinsried , Germany
| | - Wolfgang Enard
- Department of Biology II , Ludwig-Maximilians-University , 82152 Planegg-Martinsried , Germany
| | - Rolf Müller
- Department of Pharmacy , Saarland University , 66125 Saarbrücken , Germany
- Department of Microbial Natural Products , Helmholtz Institute for Pharmaceutical Research Saarland and Helmholtz Centre for Infection Research , 66123 Saarbrücken , Germany
| | - Angelika M Vollmar
- Department of Pharmacy , Ludwig-Maximilians-University , 81377 Munich , Germany
| | - Sabine Schneider
- Department of Chemistry , Technical University Munich , 85748 Garching , Germany
| | - Stefan Zahler
- Department of Pharmacy , Ludwig-Maximilians-University , 81377 Munich , Germany
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17
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Tamele IJ, Silva M, Vasconcelos V. The Incidence of Marine Toxins and the Associated Seafood Poisoning Episodes in the African Countries of the Indian Ocean and the Red Sea. Toxins (Basel) 2019; 11:E58. [PMID: 30669603 PMCID: PMC6357038 DOI: 10.3390/toxins11010058] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 01/10/2019] [Accepted: 01/10/2019] [Indexed: 01/09/2023] Open
Abstract
The occurrence of Harmful Algal Blooms (HABs) and bacteria can be one of the great threats to public health due to their ability to produce marine toxins (MTs). The most reported MTs include paralytic shellfish toxins (PSTs), amnesic shellfish toxins (ASTs), diarrheic shellfish toxins (DSTs), cyclic imines (CIs), ciguatoxins (CTXs), azaspiracids (AZTs), palytoxin (PlTXs), tetrodotoxins (TTXs) and their analogs, some of them leading to fatal outcomes. MTs have been reported in several marine organisms causing human poisoning incidents since these organisms constitute the food basis of coastal human populations. In African countries of the Indian Ocean and the Red Sea, to date, only South Africa has a specific monitoring program for MTs and some other countries count only with respect to centers of seafood poisoning control. Therefore, the aim of this review is to evaluate the occurrence of MTs and associated poisoning episodes as a contribution to public health and monitoring programs as an MT risk assessment tool for this geographic region.
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Affiliation(s)
- Isidro José Tamele
- CIIMAR/CIMAR-Interdisciplinary Center of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto, Avenida General Norton de Matos, 4450-238 Matosinhos, Portugal.
- Institute of Biomedical Science Abel Salazar, University of Porto, R. Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal.
- Department of Chemistry, Faculty of Sciences, Eduardo Mondlane University, Av. Julius Nyerere, n 3453, Campus Principal, Maputo 257, Mozambique.
| | - Marisa Silva
- CIIMAR/CIMAR-Interdisciplinary Center of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto, Avenida General Norton de Matos, 4450-238 Matosinhos, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4619-007 Porto, Portugal.
| | - Vitor Vasconcelos
- CIIMAR/CIMAR-Interdisciplinary Center of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto, Avenida General Norton de Matos, 4450-238 Matosinhos, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4619-007 Porto, Portugal.
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18
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Farabegoli F, Blanco L, Rodríguez LP, Vieites JM, Cabado AG. Phycotoxins in Marine Shellfish: Origin, Occurrence and Effects on Humans. Mar Drugs 2018; 16:E188. [PMID: 29844286 PMCID: PMC6025170 DOI: 10.3390/md16060188] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 05/18/2018] [Accepted: 05/25/2018] [Indexed: 02/07/2023] Open
Abstract
Massive phytoplankton proliferation, and the consequent release of toxic metabolites, can be responsible for seafood poisoning outbreaks: filter-feeding mollusks, such as shellfish, mussels, oysters or clams, can accumulate these toxins throughout the food chain and present a threat for consumers' health. Particular environmental and climatic conditions favor this natural phenomenon, called harmful algal blooms (HABs); the phytoplankton species mostly involved in these toxic events are dinoflagellates or diatoms belonging to the genera Alexandrium, Gymnodinium, Dinophysis, and Pseudo-nitzschia. Substantial economic losses ensue after HABs occurrence: the sectors mainly affected include commercial fisheries, tourism, recreational activities, and public health monitoring and management. A wide range of symptoms, from digestive to nervous, are associated to human intoxication by biotoxins, characterizing different and specific syndromes, called paralytic shellfish poisoning, amnesic shellfish poisoning, diarrhetic shellfish poisoning, and neurotoxic shellfish poisoning. This review provides a complete and updated survey of phycotoxins usually found in marine invertebrate organisms and their relevant properties, gathering information about the origin, the species where they were found, as well as their mechanism of action and main effects on humans.
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Affiliation(s)
- Federica Farabegoli
- Food Safety and Industrial Hygiene Division, ANFACO-CECOPESCA. 16, Crta. Colexio Universitario, 36310 Vigo (Pontevedra), Spain.
| | - Lucía Blanco
- Food Safety and Industrial Hygiene Division, ANFACO-CECOPESCA. 16, Crta. Colexio Universitario, 36310 Vigo (Pontevedra), Spain.
| | - Laura P Rodríguez
- Food Safety and Industrial Hygiene Division, ANFACO-CECOPESCA. 16, Crta. Colexio Universitario, 36310 Vigo (Pontevedra), Spain.
| | - Juan Manuel Vieites
- Food Safety and Industrial Hygiene Division, ANFACO-CECOPESCA. 16, Crta. Colexio Universitario, 36310 Vigo (Pontevedra), Spain.
| | - Ana García Cabado
- Food Safety and Industrial Hygiene Division, ANFACO-CECOPESCA. 16, Crta. Colexio Universitario, 36310 Vigo (Pontevedra), Spain.
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19
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Alarcan J, Biré R, Le Hégarat L, Fessard V. Mixtures of Lipophilic Phycotoxins: Exposure Data and Toxicological Assessment. Mar Drugs 2018; 16:E46. [PMID: 29385038 PMCID: PMC5852474 DOI: 10.3390/md16020046] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/18/2018] [Accepted: 01/29/2018] [Indexed: 01/23/2023] Open
Abstract
Lipophilic phycotoxins are secondary metabolites produced by phytoplanktonic species. They accumulate in filter-feeding shellfish and can cause human intoxication. Regulatory limits have been set for individual toxins, and the toxicological features are well characterized for some of them. However, phycotoxin contamination is often a co-exposure phenomenon, and toxicological data regarding mixtures effects are very scarce. Moreover, the type and occurrence of phycotoxins can greatly vary from one region to another. This review aims at summarizing the knowledge on (i) multi-toxin occurrence by a comprehensive literature review and (ii) the toxicological assessment of mixture effects. A total of 79 publications was selected for co-exposure evaluation, and 44 of them were suitable for toxin ratio calculations. The main toxin mixtures featured okadaic acid in combination with pectenotoxin-2 or yessotoxin. Only a few toxicity studies dealing with co-exposure were published. In vivo studies did not report particular mixture effects, whereas in vitro studies showed synergistic or antagonistic effects. Based on the combinations that are the most reported, further investigations on mixture effects must be carried out.
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Affiliation(s)
- Jimmy Alarcan
- Toxicology of Contaminants Unit, French Agency for Food, Environmental and Occupational Health and Safety, ANSES, 35300 Fougères, France.
| | - Ronel Biré
- Marine Biotoxins Unit, French Agency for Food, Environmental and Occupational Health and Safety, ANSES, 94706 Maisons-Alfort, France.
| | - Ludovic Le Hégarat
- Toxicology of Contaminants Unit, French Agency for Food, Environmental and Occupational Health and Safety, ANSES, 35300 Fougères, France.
| | - Valérie Fessard
- Toxicology of Contaminants Unit, French Agency for Food, Environmental and Occupational Health and Safety, ANSES, 35300 Fougères, France.
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20
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Hori M, Yazama F, Matsuura Y, Yoshimoto R, Kaneda T, Yasumoto T, Ozaki H, Karaki H. Inhibition of actin polymerization by marine toxin pectenotoxin-2. J Vet Med Sci 2017; 80:225-234. [PMID: 29279465 PMCID: PMC5836757 DOI: 10.1292/jvms.17-0654] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Pectenotoxin-2 (PCTX-2) is one of the polyether macrolide toxins isolated from scallops
involved in diarrheic shellfish poisoning via actin depolymerization. In the present
study, we examined the bioactive mechanism of PCTX-2 in smooth muscle cells and clarify
mode of action of the PCTX-2-induced actin depolymerization using purified skeletal actin.
PCTX-2 (300 nM-3 µM) non-selectively inhibited vascular smooth muscle
contractions elicited by high K+ or phenylephrine in a dose-dependent manner.
However, elevated cytosolic Ca2+ and myosin light chain phosphorylation
stimulated by high K+ were only slightly inhibited by PCTX-2. By monitoring the
fluorescent intensity of pyrenyl-actin, PCTX-2 was found to inhibit both the velocity and
degree of actin polymerization. The critical concentration of G-actin was linearly
increased in accordance with the concentration of PCTX-2, indicating sequestration of
G-actin with 1 to 1 ratio. The kinetics of F-actin depolymerization by dilution assay
indicated that PCTX-2 does not sever F-actin. Transmission electron microscopic and
confocal microscopic observations demonstrated that PCTX-2 selectively depolymerized
filamentous actin without affecting tublin. In conclusion, PCTX-2 is a potent natural
actin depolymerizer which sequesters G-actin without severing F-actin.
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Affiliation(s)
- Masatoshi Hori
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Futoshi Yazama
- Laboratory of Cell Biology and Morphology, School of Bioresources Hiroshima Prefectural University, Shoubara-shi, Hiroshima 727-0023, Japan
| | - Yasuhiro Matsuura
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Ryo Yoshimoto
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Takeharu Kaneda
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino, Tokyo 180-8602, Japan
| | - Takeshi Yasumoto
- Japan Food Research Laboratories, 6-11-10 Nagayama, Tama, Tokyo 206-0025, Japan
| | - Hiroshi Ozaki
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Hideaki Karaki
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
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21
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Assunção J, Guedes AC, Malcata FX. Biotechnological and Pharmacological Applications of Biotoxins and Other Bioactive Molecules from Dinoflagellates. Mar Drugs 2017; 15:E393. [PMID: 29261163 PMCID: PMC5742853 DOI: 10.3390/md15120393] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 12/12/2017] [Accepted: 12/15/2017] [Indexed: 12/26/2022] Open
Abstract
The long-lasting interest in bioactive molecules (namely toxins) produced by (microalga) dinoflagellates has risen in recent years. Exhibiting wide diversity and complexity, said compounds are well-recognized for their biological features, with great potential for use as pharmaceutical therapies and biological research probes. Unfortunately, provision of those compounds is still far from sufficient, especially in view of an increasing demand for preclinical testing. Despite the difficulties to establish dinoflagellate cultures and obtain reasonable productivities of such compounds, intensive research has permitted a number of advances in the field. This paper accordingly reviews the characteristics of some of the most important biotoxins (and other bioactive substances) produced by dinoflagellates. It also presents and discusses (to some length) the main advances pertaining to dinoflagellate production, from bench to large scale-with an emphasis on material published since the latest review available on the subject. Such advances encompass improvements in nutrient formulation and light supply as major operational conditions; they have permitted adaptation of classical designs, and aided the development of novel configurations for dinoflagellate growth-even though shearing-related issues remain a major challenge.
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Affiliation(s)
- Joana Assunção
- LEPABE-Laboratory of Process Engineering, Environment, Biotechnology and Energy, Rua Dr. Roberto Frias, s/n, P-4200-465 Porto, Portugal.
| | - A Catarina Guedes
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, s/n, P-4450-208 Matosinhos, Portugal.
| | - F Xavier Malcata
- LEPABE-Laboratory of Process Engineering, Environment, Biotechnology and Energy, Rua Dr. Roberto Frias, s/n, P-4200-465 Porto, Portugal.
- Department of Chemical Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, P-4200-465 Porto, Portugal.
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22
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O'Rourke NF, A M, Higgs HN, Eastman A, Micalizio GC. Function-Oriented Studies Targeting Pectenotoxin 2: Synthesis of the GH-Ring System and a Structurally Simplified Macrolactone. Org Lett 2017; 19:5154-5157. [PMID: 28901150 PMCID: PMC5633828 DOI: 10.1021/acs.orglett.7b02435] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
A chemical
foundation for function-oriented studies of pectenotoxin
2 (PTX2) is described. A synthesis of the bicyclic GH-system, and
the design and synthesis of a PTX2-analogue, is presented. While maintaining
critical features for actin binding, and lacking the Achilles’
heel for the natural product’s anticancer activity (the AB-spiroketal),
this first-generation analogue did not possess the anticancer properties
of PTX2, an observation that indicates the molecular significance
of features present in the natural product’s CDEF-tetracycle.
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Affiliation(s)
- Natasha F O'Rourke
- Department of Chemistry, Dartmouth College, Burke Laboratory , Hanover, New Hampshire 03755, United States
| | - Mu A
- Geisel School of Medicine, Dartmouth College , Hanover, New Hampshire 03755, United States
| | - Henry N Higgs
- Geisel School of Medicine, Dartmouth College , Hanover, New Hampshire 03755, United States
| | - Alan Eastman
- Geisel School of Medicine, Dartmouth College , Hanover, New Hampshire 03755, United States
| | - Glenn C Micalizio
- Department of Chemistry, Dartmouth College, Burke Laboratory , Hanover, New Hampshire 03755, United States
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23
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Andrei SA, Sijbesma E, Hann M, Davis J, O’Mahony G, Perry MWD, Karawajczyk A, Eickhoff J, Brunsveld L, Doveston RG, Milroy LG, Ottmann C. Stabilization of protein-protein interactions in drug discovery. Expert Opin Drug Discov 2017; 12:925-940. [DOI: 10.1080/17460441.2017.1346608] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Sebastian A. Andrei
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Eline Sijbesma
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Michael Hann
- Platform Technology and Science, Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, UK
| | - Jeremy Davis
- Department of Chemistry, UCB Celltech, Slough, UK
| | - Gavin O’Mahony
- CVMD Medicinal Chemistry, Innovative Medicines and Early Development, AstraZeneca Gothenburg, Pepparedsleden, Mölndal, Sweden
| | - Matthew W. D. Perry
- RIA Medicinal Chemistry, Innovative Medicines and Early Development, AstraZeneca Gothenburg, Pepparedsleden, Mölndal, Sweden
| | - Anna Karawajczyk
- Medicinal Chemistry, Taros Chemicals GmbH & Co. KG, Dortmund, Germany
| | - Jan Eickhoff
- Assay development & screening, Lead Discovery Center GmbH, Dortmund, Germany
| | - Luc Brunsveld
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Richard G. Doveston
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Lech-Gustav Milroy
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
- Department of Chemistry, University of Duisburg-Essen, Essen, Germany
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24
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Johnson S, Rahmani R, Drew DR, Williams MJ, Wilkinson M, Tan YH, Huang JX, Tonkin CJ, Beeson JG, Baum J, Smith BJ, Baell JB. Truncated Latrunculins as Actin Inhibitors Targeting Plasmodium falciparum Motility and Host Cell Invasion. J Med Chem 2016; 59:10994-11005. [PMID: 28002959 DOI: 10.1021/acs.jmedchem.6b01109] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Polymerization of the cytosolic protein actin is critical to cell movement and host cell invasion by the malaria parasite, Plasmodium falciparum. Any disruption to actin polymerization dynamics will render the parasite incapable of invading a host cell and thereby unable to cause infection. Here, we explore the potential of using truncated latrunculins as potential chemotherapeutics for the treatment of malaria. Exploration of the binding interactions of the natural actin inhibitor latrunculins with actin revealed how a truncated core of the inhibitor could retain its key interaction features with actin. This truncated core was synthesized and subjected to preliminary structure-activity relationship studies to generate a focused set of analogues. Biochemical analyses of these analogues demonstrate their 6-fold increased activity compared with that of latrunculin B against P. falciparum and a 16-fold improved selectivity ex vivo. These data establish the latrunculin core as a potential focus for future structure-based drug design of chemotherapeutics against malaria.
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Affiliation(s)
- Swapna Johnson
- La Trobe Institute for Molecular Science, La Trobe University , Melbourne, Victoria 3086, Australia.,Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
| | - Raphaël Rahmani
- Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
| | - Damien R Drew
- Burnet Institute , 85 Commercial Rd, Melbourne Victoria 3004, Australia.,Central Clinical School and Department of Microbiology, Monash University , Melbourne, Victoria 3004, Australia
| | - Melanie J Williams
- Walter and Eliza Hall Institute , 1G Royal Parade, Parkville, Victoria 3052, Australia.,The Department of Medical Biology, The University of Melbourne , Melbourne, Victoria 3010, Australia
| | - Mark Wilkinson
- Department of Life Sciences, Imperial College London , South Kensington SW7 2AZ, United Kingdom
| | - Yan Hong Tan
- Walter and Eliza Hall Institute , 1G Royal Parade, Parkville, Victoria 3052, Australia.,Department of Life Sciences, Imperial College London , South Kensington SW7 2AZ, United Kingdom
| | - Johnny X Huang
- Institute for Molecular Bioscience, The University of Queensland , St Lucia, Queensland 4072, Australia
| | - Christopher J Tonkin
- Walter and Eliza Hall Institute , 1G Royal Parade, Parkville, Victoria 3052, Australia.,The Department of Medical Biology, The University of Melbourne , Melbourne, Victoria 3010, Australia
| | - James G Beeson
- Burnet Institute , 85 Commercial Rd, Melbourne Victoria 3004, Australia.,Central Clinical School and Department of Microbiology, Monash University , Melbourne, Victoria 3004, Australia
| | - Jake Baum
- Walter and Eliza Hall Institute , 1G Royal Parade, Parkville, Victoria 3052, Australia.,Department of Life Sciences, Imperial College London , South Kensington SW7 2AZ, United Kingdom
| | - Brian J Smith
- La Trobe Institute for Molecular Science, La Trobe University , Melbourne, Victoria 3086, Australia
| | - Jonathan B Baell
- Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
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25
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Affiliation(s)
- Luis M. Botana
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain
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26
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Kouridaki A, Sofiadis M, Montagnon T, Vassilikogiannakis G. Pectenotoxin's ABCDE Ring System: A Complex Target to Test the Potential of Singlet Oxygen Super Cascades as Tools for Synthesis. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501095] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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27
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28
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Fujiwara K, Suzuki Y, Koseki N, Aki YI, Kikuchi Y, Murata SI, Yamamoto F, Kawamura M, Norikura T, Matsue H, Murai A, Katoono R, Kawai H, Suzuki T. Total Synthesis of Pectenotoxin-2. Angew Chem Int Ed Engl 2013; 53:780-4. [DOI: 10.1002/anie.201308502] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Indexed: 11/11/2022]
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29
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Helal MA, Khalifa S, Ahmed S. Differential binding of latrunculins to G-actin: a molecular dynamics study. J Chem Inf Model 2013; 53:2369-75. [PMID: 23988111 DOI: 10.1021/ci400317j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Latrunculins are unique macrolides containing a thiazolidinone moiety. Latrunculin A (1), latrunculin B (2), 16-epi-latrunculin B (3), and latrunculin T (4) were isolated from the Red Sea sponge Negombata magnifica. In the present study, after testing compounds 2-4 for cytotoxic activity, they were docked into the crystal structure of G-actin and subjected to binding energy calculation and a 20 ns MD simulation. The modeling study shows that latrunculins binding depends on both hydrophobic interaction of the macrocycle as well as H bonding of the thiazolidinone ring with Asp157 and Thr186. It was noticed that epimerization at C16 of latrunculin B was well tolerated as it could form an alternative H bonding network. However, opening of the macrocyclic ring deteriorates the actin binding due to reduced hydrophobicity. MD simulation showed that latrunculin B (2) possesses a more significant stabilizing effect on G-actin than latrunculin T (4) and could efficiently hinder the flattening transition of G-actin into F-actin. These findings could explain, at the molecular level, the impact of epimerization and macrolide ring-opening on latrunculins activity, an issue that has not been addressed before. Also, the study gives insights into the mechanism of cytotoxicity of diverse latrunculins and provides direction for future lead optimization studies.
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Affiliation(s)
- Mohamed A Helal
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Suez Canal University , Ismailia, Egypt
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30
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Kubo O, Canterbury DP, Micalizio GC. Synthesis of the C1-C26 hexacyclic subunit of pectenotoxin 2. Org Lett 2012; 14:5748-51. [PMID: 23101680 DOI: 10.1021/ol302751b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Synthesis of the C1-C26 hexacyclic subunit of pectenotoxin-2 (PTX-2) is described that features a stereoselective annulation to generate the C-ring by triple asymmetric Nozaki-Hiyama-Kishi coupling followed by oxidative cyclization. Preparation of the C1-C14 AB spriroketal-containing subunit employs a recently developed metallacycle-mediated reductive cross-coupling between a TMS-alkyne and a terminal alkene.
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Affiliation(s)
- Ozora Kubo
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, USA
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31
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Abstract
Although there has been much progress with regard to marine toxins from dinoflagellates, much remains to be done. Because these compounds are a seafood consumer risk, the demands cover from legislative to scientific aspects. Legislation is required for all new toxins that appear in the coasts. On the other hand, it is important to understand the toxicity of the different analogues, in terms of both the relative toxicity to reference compounds and the mechanism of toxicity itself, both acute and long-term. For this, a uniform approach to do toxic studies is necessary, especially acute toxicity. The need for pure standards in sufficient supply and the understanding of the mode of action of some of the compounds (such as yessotoxin or azaspiracids) will help the development of another important field, the use of marine toxins as drug leads, and the chemistry around them.
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Affiliation(s)
- Luis M Botana
- Department Farmacología, Fac. Veterinaria-USC, 27002 Lugo, Spain.
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32
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Collaborative study for the detection of toxic compounds in shellfish extracts using cell-based assays. Part I: screening strategy and pre-validation study with lipophilic marine toxins. Anal Bioanal Chem 2012; 403:1983-93. [DOI: 10.1007/s00216-012-6028-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 03/30/2012] [Accepted: 04/06/2012] [Indexed: 10/28/2022]
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33
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Butler SC, Miles CO, Karim A, Twiner MJ. Inhibitory effects of pectenotoxins from marine algae on the polymerization of various actin isoforms. Toxicol In Vitro 2012; 26:493-9. [DOI: 10.1016/j.tiv.2011.12.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 12/21/2011] [Accepted: 12/22/2011] [Indexed: 11/26/2022]
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34
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Kim GY, Kim WJ, Choi YH. Pectenotoxin-2 from marine sponges: a potential anti-cancer agent-a review. Mar Drugs 2011; 9:2176-2187. [PMID: 22163180 PMCID: PMC3229229 DOI: 10.3390/md9112176] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Revised: 10/09/2011] [Accepted: 10/19/2011] [Indexed: 11/27/2022] Open
Abstract
Pectenotoxin-2 (PTX-2), which was first identified as a cytotoxic entity in marine sponges, has been reported to display significant cytotoxicity to human cancer cells where it inhibits mitotic separation and cytokinesis through the depolymerization of actin filaments. In the late stage of endoreduplication, the effects of PTX-2 on different cancer cells involves: (i) down-regulation of anti-apoptotic Bcl-2 members and IAP family proteins; (ii) up-regulation of pro-apoptotic Bax protein and tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-receptor 1/receptor 2 (DR4/DR5); and (iii) mitochondrial dysfunction. In addition, PTX-2 induces apoptotic effects through suppression of the nuclear factor κB (NF-κB) signaling pathway in several cancer cells. Analysis of cell cycle regulatory proteins showed that PTX-2 increases phosphorylation of Cdc25c and decreases protein levels of Cdc2 and cyclin B1. Cyclin-dependent kinase (Cdk) inhibitor p21 and Cdk2, which are associated with the induction of endoreduplication, were upregulated. Furthermore, it was found that PTX-2 suppressed telomerase activity through the transcriptional and post-translational suppression of hTERT. The purpose of this review was to provide an update regarding the anti-cancer mechanism of PTX-2, with a special focus on its effects on different cellular signaling cascades.
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Affiliation(s)
- Gi-Young Kim
- Laboratory of Immunobiology, Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Korea; E-Mail:
| | - Wun-Jae Kim
- Department of Urology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea; E-Mail:
| | - Yung Hyun Choi
- Department of Biochemistry, College of Oriental Medicine, Dongeui University, Busan 614-052, Korea
- Department of Biomaterial Control (BK21 program), Graduate School, and Blue-Bio Industry RIC, Dongeui University, Busan 614-052, Korea
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +82-51-850-7413; Fax: +82-51-853-4036
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Fujiwara K, Suzuki Y, Koseki N, Murata SI, Murai A, Kawai H, Suzuki T. Improved synthesis of C8–C20 segment of pectenotoxin-2. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Sumiya E, Shimogawa H, Sasaki H, Tsutsumi M, Yoshita K, Ojika M, Suenaga K, Uesugi M. Cell-morphology profiling of a natural product library identifies bisebromoamide and miuraenamide A as actin filament stabilizers. ACS Chem Biol 2011; 6:425-31. [PMID: 21322638 DOI: 10.1021/cb1003459] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Natural products provide a rich source of biological tools, but elucidating their molecular targets remains challenging. Here we report a cell morphological profiling of a natural product library, which permitted the identification of bisebromoamide and miuraenamide A as actin filament stabilizers. Automated high-content image analysis showed that these two structurally distinct marine natural products induce morphological changes in HeLa cells similar to those induced by known actin-stabilizing compounds. Bisebromoamide and miuraenamide A stabilized actin filaments in vitro, and fluorescein-conjugated bisebromoamide localized specifically to actin filaments in cells. Cell morphological profiling was also used to identify actin-stabilizing or -destabilizing natural products from marine sponge extracts, leading to the isolation of pectenotoxin-2 and lyngbyabellin C. Overall, the results demonstrate that high-content imaging of nuclei and cell shapes offers a sensitive and convenient method for detecting and isolating molecules that target actin.
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Affiliation(s)
| | | | - Hiroaki Sasaki
- Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan
| | - Masato Tsutsumi
- Yokogawa Electric Corporation, 2-3 Hokuyodai, Kanazawa, Ishikawa 920-0177, Japan
| | - Ken’ichi Yoshita
- Yokogawa Electric Corporation, 2-3 Hokuyodai, Kanazawa, Ishikawa 920-0177, Japan
| | - Makoto Ojika
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Kiyotake Suenaga
- Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan
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Canterbury DP, Micalizio GC. A convergent route to the CDEF-tetracycle of pectenotoxin-2. Org Lett 2011; 13:2384-7. [PMID: 21476517 DOI: 10.1021/ol200627d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A convergent synthesis of the CDEF-tetracyclic region of pectenotoxin-2 (PTX-2) is described. The synthetic pathway derives from a head-to-tail union of 2 equiv of linalool to establish a stereodefined DEF-tricyclic aldehyde. Subsequent coupling with a "northern" fragment enolate, followed by a tandem Sharpless epoxidation/cyclization, delivers the C10-C26 polycyclic region of the natural product.
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Affiliation(s)
- Daniel P Canterbury
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
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Aho JE, Piisola A, Syam Krishnan K, Pihko PM. Synthetic Studies towards Pectenotoxin-2: Synthesis of the Nonanomeric 10-epi-ABCDE Ring Segment by Kinetic Spiroketalization. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001411] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Botana LM, Vilariño N, Alfonso A, Vale C, Louzao C, Elliott CT, Campbell K, Botana AM. The problem of toxicity equivalent factors in developing alternative methods to animal bioassays for marine-toxin detection. Trends Analyt Chem 2010. [DOI: 10.1016/j.trac.2010.09.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Furey A, O'Doherty S, O'Callaghan K, Lehane M, James KJ. Azaspiracid poisoning (AZP) toxins in shellfish: Toxicological and health considerations. Toxicon 2010; 56:173-90. [DOI: 10.1016/j.toxicon.2009.09.009] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2008] [Accepted: 09/18/2009] [Indexed: 11/29/2022]
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41
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Dominguez HJ, Paz B, Daranas AH, Norte M, Franco JM, Fernández JJ. Dinoflagellate polyether within the yessotoxin, pectenotoxin and okadaic acid toxin groups: Characterization, analysis and human health implications. Toxicon 2010; 56:191-217. [DOI: 10.1016/j.toxicon.2009.11.005] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2008] [Revised: 10/11/2009] [Accepted: 11/09/2009] [Indexed: 11/26/2022]
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Espiña B, Louzao MC, Ares IR, Fonfría ES, Vilariño N, Vieytes MR, Yasumoto T, Botana LM. Impact of the Pectenotoxin C-43 Oxidation Degree on Its Cytotoxic Effect on Rat Hepatocytes. Chem Res Toxicol 2010; 23:504-15. [DOI: 10.1021/tx9002337] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Begoña Espiña
- Departamento de Farmacologia, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, Departamento de Fisiologia Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, and Japan Food Research Laboratories, Tama, Tokyo 206-0025, Japan
| | - M. Carmen Louzao
- Departamento de Farmacologia, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, Departamento de Fisiologia Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, and Japan Food Research Laboratories, Tama, Tokyo 206-0025, Japan
| | - Isabel R. Ares
- Departamento de Farmacologia, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, Departamento de Fisiologia Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, and Japan Food Research Laboratories, Tama, Tokyo 206-0025, Japan
| | - Eva S. Fonfría
- Departamento de Farmacologia, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, Departamento de Fisiologia Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, and Japan Food Research Laboratories, Tama, Tokyo 206-0025, Japan
| | - Natalia Vilariño
- Departamento de Farmacologia, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, Departamento de Fisiologia Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, and Japan Food Research Laboratories, Tama, Tokyo 206-0025, Japan
| | - Mercedes R. Vieytes
- Departamento de Farmacologia, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, Departamento de Fisiologia Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, and Japan Food Research Laboratories, Tama, Tokyo 206-0025, Japan
| | - Takeshi Yasumoto
- Departamento de Farmacologia, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, Departamento de Fisiologia Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, and Japan Food Research Laboratories, Tama, Tokyo 206-0025, Japan
| | - Luis M. Botana
- Departamento de Farmacologia, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, Departamento de Fisiologia Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain, and Japan Food Research Laboratories, Tama, Tokyo 206-0025, Japan
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Phycotoxins: chemistry, mechanisms of action and shellfish poisoning. EXPERIENTIA SUPPLEMENTUM 2010; 100:65-122. [PMID: 20358682 DOI: 10.1007/978-3-7643-8338-1_3] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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46
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Functional assays for marine toxins as an alternative, high-throughput-screening solution to animal tests. Trends Analyt Chem 2009. [DOI: 10.1016/j.trac.2009.02.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Saito SY. Toxins affecting actin filaments and microtubules. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2009; 46:187-219. [PMID: 19184589 DOI: 10.1007/978-3-540-87895-7_7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Actin and tubulin are the two major proteins of the cytoskeleton in eukaryotic cells and both display a common property to reversibly assemble into long and flexible polymers, actin filaments and microtubules, respectively. These proteins play important roles in a variety of cellular functions and are also involved in numbers of diseases. An emerging number of marine-derived cytotoxins have been found to bind either actin or tublin, resulting in either inhibition or enhancement of polymerization. Thus, these toxins are valuable molecular probes for solving complex mechanisms of biological processes. This chapter describes actin- and tubulin-targeting marine natural products and their modes of action, with reference to their use as research tools and their clinical applications.
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Affiliation(s)
- Shin-ya Saito
- Department of Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Yada 52-1, Suruga-ku, Shizuoka 422-8526, Japan.
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48
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Blunt JW, Copp BR, Hu WP, Munro MHG, Northcote PT, Prinsep MR. Marine natural products. Nat Prod Rep 2009; 26:170-244. [PMID: 19177222 DOI: 10.1039/b805113p] [Citation(s) in RCA: 410] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review covers the literature published in 2007 for marine natural products, with 948 citations(627 for the period January to December 2007) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, cnidarians,bryozoans, molluscs, tunicates, echinoderms and true mangrove plants. The emphasis is on new compounds (961 for 2007), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.1 Introduction, 2 Reviews, 3 Marine microorganisms and phytoplankton, 4 Green algae, 5 Brown algae, 6 Red algae, 7 Sponges, 8 Cnidarians, 9 Bryozoans, 10 Molluscs, 11 Tunicates (ascidians),12 Echinoderms, 13 Miscellaneous, 14 Conclusion, 15 References.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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Carley S, Brimble MA. A Novel Approach to the CDE Ring System of Pectenotoxin-4 Triggered by VO(acac)2-Induced Epoxy-Acetalization. Org Lett 2008; 11:563-6. [DOI: 10.1021/ol8025457] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sarah Carley
- Department of Chemistry, The University of Auckland, 23 Symonds Street, Auckland, New Zealand
| | - Margaret A. Brimble
- Department of Chemistry, The University of Auckland, 23 Symonds Street, Auckland, New Zealand
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50
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Espiña B, Rubiolo JA. Marine toxins and the cytoskeleton: pectenotoxins, unusual macrolides that disrupt actin. FEBS J 2008; 275:6082-8. [DOI: 10.1111/j.1742-4658.2008.06714.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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