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Sondermann P, Carreira EM. Stereochemical Revision, Total Synthesis, and Solution State Conformation of the Complex Chlorosulfolipid Mytilipin B. J Am Chem Soc 2019; 141:10510-10519. [PMID: 31244189 DOI: 10.1021/jacs.9b05013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Chlorosulfolipids constitute a structurally intriguing and synthetically challenging class of marine natural products that are isolated from mussels and freshwater algae. The most complex structure from this family of compounds is currently represented by Mytilipin B, isolated in 2002 from culinary mussel Mytilus galloprovincialis, whose initially proposed structure was shown to be incorrect. In this study, we present the synthesis of four diastereomers which allowed the reassignment of eight stereocenters and the stereochemical revision of Mytilipin B, along with the determination of the dominant solution-state conformation.
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Affiliation(s)
- Philipp Sondermann
- Eidgenössische Technische Hochschule Zürich , Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland
| | - Erick M Carreira
- Eidgenössische Technische Hochschule Zürich , Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland
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2
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Boshkow J, Fischer S, Bailey AM, Wolfrum S, Carreira EM. Stereochemistry and biological activity of chlorinated lipids: a study of danicalipin A and selected diastereomers. Chem Sci 2017; 8:6904-6910. [PMID: 29147515 PMCID: PMC5632803 DOI: 10.1039/c7sc03124f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 08/07/2017] [Indexed: 11/21/2022] Open
Abstract
The syntheses of (+)-16-epi- and (+)-11,15-di-epi-danicalipin A (2 and 3) are reported. The conformations of the parent diols 5 and 6 as well as the corresponding disulfates 2 and 3 were determined on the basis of J-based configuration analysis and supported by calculations. The impact of configuration on membrane permeability in Gram-negative bacteria and mammalian cell lines was assessed as well as cytotoxicity. Although diastereomer 2 showed similar behavior to natural (+)-danicalipin A (1), strikingly, the more flexible C11,C15-epimer 3 had no effect on permeability and proved equally or more toxic towards multiple cell lines.
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Affiliation(s)
- J Boshkow
- Laboratorium für Organische Chemie , ETH Zürich , HCI H335, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland .
| | - S Fischer
- Laboratorium für Organische Chemie , ETH Zürich , HCI H335, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland .
| | - A M Bailey
- Laboratorium für Organische Chemie , ETH Zürich , HCI H335, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland .
| | - S Wolfrum
- Laboratorium für Organische Chemie , ETH Zürich , HCI H335, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland .
| | - E M Carreira
- Laboratorium für Organische Chemie , ETH Zürich , HCI H335, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland .
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3
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Rubio D, Roa L, Soto D, Velasquez F, Gregorcic N, Soto J, Martinez M, Kalergis A, Vasquez A. Purification and characterization of saxitoxin from Mytilus chilensis of southern Chile. Toxicon 2015; 108:147-53. [DOI: 10.1016/j.toxicon.2015.09.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 09/27/2015] [Accepted: 09/29/2015] [Indexed: 11/30/2022]
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4
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Bailey AM, Wolfrum S, Carreira EM. Biological Investigations of (+)-Danicalipin A Enabled Through Synthesis. Angew Chem Int Ed Engl 2015; 55:639-43. [PMID: 26610732 DOI: 10.1002/anie.201509082] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Indexed: 11/09/2022]
Abstract
A total synthesis of the chlorosulfolipid (+)-danicalipin A has been accomplished in 12 steps and 4.4% overall yield. The efficient and scalable synthesis enabled in-depth investigations of the lipid's biological properties, in particular cytotoxicity towards various mammalian cell lines. Furthermore, the ability of (+)-danicalipin A to increase the uptake of fluorophores into bacteria and mammalian cells was demonstrated, indicating it may enhance membrane permeability. By comparing (+)-danicalipin A with racemic 1,14-docosane disulfate, and the diol precursor of (+)-danicalipin A, we have shown that both chlorine and sulfate functionalities are necessary for biological activity.
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Affiliation(s)
- Adrian M Bailey
- Laboratorium für Organische Chemie, Eidgenössische Technische Hochschule Zürich, HCI H335, Vladimir-Prelog-Weg 3, 8093 Zürich (Switzerland)
| | - Susanne Wolfrum
- Laboratorium für Organische Chemie, Eidgenössische Technische Hochschule Zürich, HCI H335, Vladimir-Prelog-Weg 3, 8093 Zürich (Switzerland)
| | - Erick M Carreira
- Laboratorium für Organische Chemie, Eidgenössische Technische Hochschule Zürich, HCI H335, Vladimir-Prelog-Weg 3, 8093 Zürich (Switzerland).
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5
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Bailey AM, Wolfrum S, Carreira EM. Biological Investigations of (+)-Danicalipin A Enabled Through Synthesis. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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6
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Grienke U, Silke J, Tasdemir D. Bioactive compounds from marine mussels and their effects on human health. Food Chem 2013; 142:48-60. [PMID: 24001811 DOI: 10.1016/j.foodchem.2013.07.027] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 05/13/2013] [Accepted: 07/04/2013] [Indexed: 12/30/2022]
Abstract
The consumption of marine mussels as popular seafood has increased steadily over the past decades. Awareness of mussel derived molecules, that promote health, has contributed to extensive research efforts in that field. This review highlights the bioactive potential of mussel components from species of the genus Mytilus (e.g. M. edulis) and Perna (e.g. P. canaliculus). In particular, the bioactivity related to three major chemical classes of mussel primary metabolites, i.e. proteins, lipids, and carbohydrates, is evaluated. Within the group of proteins the focus is mainly on mussel peptides e.g. those obtained by bio-transformation processes, such as fermentation. In addition, mussel lipids, comprising polyunsaturated fatty acids (PUFAs), are discussed as compounds that are well known for prevention and treatment of rheumatoid arthritis (RA). Within the third group of carbohydrates, mussel polysaccharides are investigated. Furthermore, the importance of monitoring the mussel as food material in respect to contaminations with natural toxins produced by microalgae is discussed.
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Affiliation(s)
- Ulrike Grienke
- School of Chemistry, National University of Ireland, Galway (NUIG), University Road, Galway, Ireland
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7
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Dethe DH, Ranjan A. Enantioselective total syntheses and determination of absolute configuration of marine toxins, oxazinins. RSC Adv 2013. [DOI: 10.1039/c3ra44631j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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8
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López JC, Plumet J. Metathesis Reactions of Carbohydrates: Recent Highlights in Alkyne Metathesis. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001518] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- J. Cristóbal López
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Joaquín Plumet
- Universidad Complutense, Facultad de Química, Departamento de Química Orgánica, Ciudad Universitaria s/n, 28040 Madrid, Spain, Fax: +34‐91‐394‐4103
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9
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Yoshimitsu T, Nakatani R, Kobayashi A, Tanaka T. Asymmetric total synthesis of (+)-danicalipin A. Org Lett 2011; 13:908-11. [PMID: 21288044 DOI: 10.1021/ol1029518] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A convergent asymmetric total synthesis of (+)-danicalipin A is accomplished, in which two chlorinated fragments are stereoselectively joined by 1,3-dipolar coupling, leading to the confirmation of the absolute configuration of the natural product.
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Affiliation(s)
- Takehiko Yoshimitsu
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan.
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10
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Denton RM, Tang X, Przeslak A. Catalysis of phosphorus(V)-mediated transformations: dichlorination reactions of epoxides under Appel conditions. Org Lett 2011; 12:4678-81. [PMID: 20845932 DOI: 10.1021/ol102010h] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A stereospecific triphenylphosphine oxide-catalyzed 1,2-dichlorination reaction of epoxides has been developed. The reaction is effective for a range of terminal and internal epoxides. In contrast to the classical Appel-type dichlorination of epoxides, oxalyl chloride is used as a stoichiometric reagent to generate the chlorophosphonium salt responsible for dichlorination from catalytic triphenylphosphine oxide.
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Affiliation(s)
- Ross M Denton
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom.
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11
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Kanady JS, Nguyen JD, Ziller JW, Vanderwal CD. Synthesis and characterization of all four diastereomers of 3,4-dichloro-2-pentanol, motifs relevant to the chlorosulfolipids. J Org Chem 2010; 74:2175-8. [PMID: 19161314 DOI: 10.1021/jo802390e] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
All four diastereomers of 3,4-dichloro-2-pentanol were synthesized by anti-dichlorination of the precursor allylic alcohols; their stereochemistry was elucidated by X-ray crystallographic analysis of tosylate derivatives. Complete NMR data is provided in the hope that this information will facilitate structural elucidation and synthesis studies on the chlorosulfolipid family of natural products, such as malhamensilipin A.
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Affiliation(s)
- Jacob S Kanady
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
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12
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Bedke DK, Shibuya GM, Pereira AR, Gerwick WH, Vanderwal CD. A concise enantioselective synthesis of the chlorosulfolipid malhamensilipin A. J Am Chem Soc 2010; 132:2542-3. [PMID: 20141139 DOI: 10.1021/ja910809c] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first enantioselective synthesis of a member of the chlorosulfolipid family of natural products is reported. All of the polar substituents of malhamensilipin A are introduced with high stereoselectivity, and the unique (E)-chlorovinyl sulfate is created by a chemo-, regio-, and stereoselective E2 elimination of HCl in a reaction that likely has a counterpart in the biosynthesis of this fascinating natural product.
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Affiliation(s)
- D Karl Bedke
- Department of Chemistry, University of California, Irvine, California 92697, USA
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13
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Yoshimitsu T, Fukumoto N, Nakatani R, Kojima N, Tanaka T. Asymmetric Total Synthesis of (+)-Hexachlorosulfolipid, a Cytotoxin Isolated from Adriatic Mussels. J Org Chem 2010; 75:5425-37. [DOI: 10.1021/jo100534d] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takehiko Yoshimitsu
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Naoya Fukumoto
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Ryo Nakatani
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Naoto Kojima
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tetsuaki Tanaka
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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14
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Pereira AR, Byrum T, Shibuya GM, Vanderwal CD, Gerwick WH. Structure revision and absolute configuration of malhamensilipin A from the freshwater chrysophyte Poterioochromonas malhamensis. JOURNAL OF NATURAL PRODUCTS 2010; 73:279-283. [PMID: 20099812 PMCID: PMC2829345 DOI: 10.1021/np900672h] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Malhamensilipin A (2), a bioactive chlorosulfolipid initially reported in 1994 from the freshwater alga Poterioochromonas malhamensis, was reinvestigated for its structural and stereochemical features. HRESIMS data revealed that 2 possesses two sulfate groups rather than the one originally reported. A combination of J-based configurational and Mosher's analyses led us to assign its absolute configuration as 11R, 12S, 13S, 14R, 15S, and 16S. Finally, comparison of (1)H and (13)C NMR chemical shifts with synthetic standards confirmed that malhamensilipin A (2) possesses a terminal double bond of E configuration.
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Affiliation(s)
- Alban R. Pereira
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093
| | - Tara Byrum
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093
| | - Grant M. Shibuya
- Department of Chemistry, University of California, Irvine, California 92697
| | | | - William H. Gerwick
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093
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15
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Bedke DK, Shibuya GM, Pereira A, Gerwick WH, Haines TH, Vanderwal CD. Relative stereochemistry determination and synthesis of the major chlorosulfolipid from Ochromonas danica. J Am Chem Soc 2009; 131:7570-2. [PMID: 19445461 DOI: 10.1021/ja902138w] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The relative stereochemistry of the major chlorosulfolipid of the chrysophyte alga Ochromonas danica, to which we have given the name "danicalipin A", is reported. The first synthesis of this lipid, via several stereospecific electrophilic additions to alkenes, serves to corroborate the stereochemical assignment made by NMR spectroscopy. The synthesis strategy described should be applicable to other chlorosulfolipids and should provide access to sufficient material for studies of the lipid's properties and function in membranes.
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Affiliation(s)
- D Karl Bedke
- Department of Chemistry, University of California, Irvine, California 92697, USA
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16
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Fusetani N, Kem W. Marine toxins: an overview. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2009; 46:1-44. [PMID: 19184583 DOI: 10.1007/978-3-540-87895-7_1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Oceans provide enormous and diverse space for marine life. Invertebrates are conspicuous inhabitants in certain zones such as the intertidal; many are soft-bodied, relatively immobile and lack obvious physical defenses. These animals frequently have evolved chemical defenses against predators and overgrowth by fouling organisms. Marine animals may accumulate and use a variety of toxins from prey organisms and from symbiotic microorganisms for their own purposes. Thus, toxic animals are particularly abundant in the oceans. The toxins vary from small molecules to high molecular weight proteins and display unique chemical and biological features of scientific interest. Many of these substances can serve as useful research tools or molecular models for the design of new drugs and pesticides. This chapter provides an initial survey of these toxins and their salient properties.
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Affiliation(s)
- Nobuhiro Fusetani
- Graduate School of Fisheries Sciences, Hokkaido University, Minato-cho, Hakodate 041-8611, Japan.
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17
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18
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Ciminiello P, Dell' Aversano C, Fattorusso E, Forino M. Chapter 1 Recent Developments in Mediterranean Harmful Algal Events. ADVANCES IN MOLECULAR TOXICOLOGY 2009. [DOI: 10.1016/s1872-0854(09)00001-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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19
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Nilewski C, Geisser RW, Carreira EM. Total synthesis of a chlorosulpholipid cytotoxin associated with seafood poisoning. Nature 2009; 457:573-6. [DOI: 10.1038/nature07734] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2008] [Accepted: 12/18/2008] [Indexed: 11/09/2022]
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20
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Bowden BF. YESSOTOXINS—POLYCYCLIC ETHERS FROM DINOFLAGELLATES: RELATIONSHIPS TO DIARRHETIC SHELLFISH TOXINS. TOXIN REV 2008. [DOI: 10.1080/15569540600599209] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Ciminiello P, Dell'Aversano C, Fattorusso E, Forino M, Tartaglione L, Grillo C, Melchiorre N. Putative palytoxin and its new analogue, ovatoxin-a, in Ostreopsis ovata collected along the Ligurian coasts during the 2006 toxic outbreak. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2008; 19:111-120. [PMID: 18063381 DOI: 10.1016/j.jasms.2007.11.001] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2007] [Revised: 10/31/2007] [Accepted: 11/01/2007] [Indexed: 05/25/2023]
Abstract
In this article we report on the liquid chromatography tandem mass spectrometry (LC-MS) investigation of plankton samples collected in the summer of 2006 along the Ligurian coasts, coinciding with a massive bloom of the tropical microalga Ostreopsis ovata. LC-MS analyses indicated the occurrence of putative palytoxin along with a much more abundant palytoxin-like compound never reported so far, which we named ovatoxin-a. On the basis of molecular formula, fragmentation pattern, and chromatographic behavior, the structure of ovatoxin-a appeared to be strictly related to that of palytoxin. We report also on the analysis of cultured O. ovata, which was necessary to unequivocally demonstrate that putative palytoxin and ovatoxin-a contained in field samples were actually produced by O. ovata itself.
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Affiliation(s)
- Patrizia Ciminiello
- Dipartimento di Chimica delle Sostanze Naturali, Università degli Studi di Napoli Federico II, Napoli, Italy
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22
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Bifulco G, Dambruoso P, Gomez-Paloma L, Riccio R. Determination of relative configuration in organic compounds by NMR spectroscopy and computational methods. Chem Rev 2007; 107:3744-79. [PMID: 17649982 DOI: 10.1021/cr030733c] [Citation(s) in RCA: 452] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Giuseppe Bifulco
- Dipartimento di Scienze Farmaceutiche, University of Salerno, Via Ponte Don Melillo, 84084 Fisciano, Salerno, Italy.
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23
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O'Connor PD, Brimble MA. Synthesis of macrocyclic shellfish toxins containing spiroimine moieties. Nat Prod Rep 2007; 24:869-85. [PMID: 17653363 DOI: 10.1039/b700307m] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An overview of the structure and biological activity of macrocyclic polyketides derived from dinoflagellates that contain unusual cyclic imine units is provided. The total and partial syntheses of these molecules are discussed with an emphasis on the construction of the spiroimine functionality thought to be the key pharmacophore of these fact-acting shellfish toxins.
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Affiliation(s)
- Patrick D O'Connor
- Department of Chemistry, The University of Auckland, 23 Symonds Street, Auckland, New Zealand
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24
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Abstract
This review covers the literature published in 2004 for marine natural products, with 693 citations (491 for the period January to December 2004) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, coelenterates, bryozoans, molluscs, tunicates and echinoderms. The emphasis is on new compounds (716 for 2004), together with their relevant biological activities, source organisms and country of origin. Biosynthetic studies (8), and syntheses (80), including those that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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25
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Abstract
In our ongoing search for bioactive metabolites from marine organisms, novel shellfish poisons have been isolated. Pinnatoxins, which are amphoteric polyether compounds, were purified from the Okinawan bivalve Pinna muricata. Pinnatoxins show acute toxicity against mice and activate Ca2+ channels. Two novel alkaloids, pinnamine and pinnaic acid, were also obtained from P. muricata. Pinnaic acid inhibits cytosolic phospholipase (cPLA2). Pteriatoxins, which are pinnatoxin analogs, were isolated from the Okinawan bivalve Pteria penguin. A nanomole-order structure determination of pteriatoxins was achieved by the detailed analysis of 2D-NMR and ESI-TOF MS/MS. This review covers the isolation, structure determination, bioactivity, synthesis, and biogenesis of these shellfish poisons and related compounds.
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Affiliation(s)
- M Kita
- Department of Chemistry, Graduate School of Science, and Institute for Advanced Research, Nagoya University, Furo-Cho, Chikusa 464-8602 Nagoya, Japan
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26
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Belen’kii L, Gramenitskaya V, Evdokimenkova Y. The Literature of Heterocyclic Chemistry, Part IX, 2002–2004. ADVANCES IN HETEROCYCLIC CHEMISTRY 2006. [DOI: 10.1016/s0065-2725(06)92004-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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27
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Dragunow M, Trzoss M, Brimble MA, Cameron R, Beuzenberg V, Holland P, Mountfort D. Investigations into the cellular actions of the shellfish toxin gymnodimine and analogues. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2005; 20:305-312. [PMID: 21783605 DOI: 10.1016/j.etap.2005.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2004] [Accepted: 02/23/2005] [Indexed: 05/31/2023]
Abstract
The effects of the shellfish toxin gymnodimine and its analogues (gymnodimine acetate, gymnodimine methyl carbonate and gymnodamine) on cellular viability were tested using the Neuro2a neuroblastoma cell line. Concentrations of toxins up to 10μM had variable effects on reducing cell number as determined using the MTT assay and no effects on the expression of a number of signal transduction proteins (c-Jun, ATF-2, ATF-3) which are sensitive to cellular stress. However, pre-exposure of Neuro2a cells to 10μM concentrations of toxins for 24h greatly sensitized these cells to the apoptotic effects of another algal toxin, okadaic acid. These results suggest that gymnodimine and its analogues sensitize Neuro2a cells to cytotoxins and raise the possibility that algal blooms involving the production of both okadaic acid-type molecules and gymnodimine may generate greater cytotoxicity and pose a greater public health problem. Furthermore, our studies establish the Neuro2a cell line as a potentially high-throughput cellular system sensitive to the pharmacological effects of gymnodimine and analogues, and as a potential screen for algal-derived toxins.
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Affiliation(s)
- Michael Dragunow
- Department of Pharmacology and The National Research Centre for Growth and Development, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
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28
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Finch SC, Wilkins AL, Hawkes AD, Jensen DJ, MacKenzie AL, Beuzenberg V, Quilliam MA, Olseng CD, Samdal IA, Aasen J, Selwood AI, Cooney JM, Sandvik M, Miles CO. Isolation and identification of (44-R,S)-44,55-dihydroxyyessotoxin from Protoceratium reticulatum, and its occurrence in extracts of shellfish from New Zealand, Norway and Canada. Toxicon 2005; 46:160-70. [PMID: 15975615 DOI: 10.1016/j.toxicon.2005.03.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2005] [Revised: 03/08/2005] [Accepted: 03/08/2005] [Indexed: 10/25/2022]
Abstract
44,55-Dihydroxyyessotoxin (1) was isolated from extracts of Protoceratium reticulatum and identified by analysis of its one- and two-dimensional NMR and mass spectra. In addition, LC-MS methods revealed the presence of compounds tentatively identified as (44-R,S)-44,55-dihydroxy-41a-homoyessotoxin (2) and (44-R,S)-44,55-dihydroxy-9-methyl-41a-homoyessotoxin (3). LC-MS analyses indicate that 1 is a constituent of P. reticulatum in New Zealand and Norway, and it was present in three species of mussels from New Zealand, Norway, and Canada.
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Affiliation(s)
- Sarah C Finch
- AgResearch Ltd, Ruakura Research Centre, Private Bag 3123, Hamilton, New Zealand
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Six-membered ring systems: with O and/or S atoms. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s0959-6380(05)80337-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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