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Irie R, Hitora Y, Watanabe R, Clark H, Suyama Y, Sekiya S, Suzuki T, Takada K, Matsunaga S, Hosokawa S, Oikawa M. Stereochemical Assignment of the 36-Membered Macrolide Ring Portion of Poecillastrin C. Org Lett 2024; 26:5290-5294. [PMID: 38864719 DOI: 10.1021/acs.orglett.4c01632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Absolute configuration at 12 stereocenters in the 36-membered macrocyclic ring portion of poecillastrin C (1) was disclosed by chemical degradation and NMR analyses of 1, chemical synthesis, and molecular modeling techniques.
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Affiliation(s)
- Raku Irie
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
- Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Yuki Hitora
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Ryuichi Watanabe
- Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Kanazawa-ku, Yokohama 236-8648, Japan
| | - Hugh Clark
- Department of Applied Chemistry, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Yu Suyama
- Department of Applied Chemistry, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Shinji Sekiya
- Department of Applied Chemistry, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Toshiyuki Suzuki
- Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Kanazawa-ku, Yokohama 236-8648, Japan
| | - Kentaro Takada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Shigeki Matsunaga
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Seijiro Hosokawa
- Department of Applied Chemistry, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Masato Oikawa
- Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
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2
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Ma J, Ye Q, Green RA, Gurak J, Ayers S, Huang Y, Miller SA. Overcoming NMR line broadening of nitrogen containing compounds: A simple solution. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2024; 62:198-207. [PMID: 38258438 DOI: 10.1002/mrc.5432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 01/04/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024]
Abstract
This study presents a straightforward solution to the challenge of elucidating the structures of nitrogen containing compounds undergoing isomerization. When spectral line broadening occurs related to isomerization, be it prototropic tautomerism or bond rotations, this poses a significant obstacle to structural elucidation. By adding acids, we demonstrate a simple approach to overcome this issue and effectively sharpen NMR signals for acid stable prototropic tautomers as well as the conformational isomers containing a morpholine or piperazine ring.
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Affiliation(s)
- Junhe Ma
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey, USA
| | - Qingmei Ye
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey, USA
| | - Rebecca A Green
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey, USA
| | - John Gurak
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey, USA
| | - Sloan Ayers
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey, USA
| | - Yande Huang
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey, USA
| | - Scott A Miller
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey, USA
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3
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Rodríguez-Berríos RR, Ríos-Delgado AM, Perdomo-Lizardo AP, Cardona-Rivera AE, Vidal-Rosado ÁG, Narváez-Lozano GA, Nieves-Quiñones IA, Rodríguez-Vargas JA, Álamo-Diverse KY, Lebrón-Acosta N, Medina-Berríos N, Rivera-Lugo PS, Avellanet-Crespo YA, Ortiz-Colón YW. Extraction, Isolation, Characterization, and Bioactivity of Polypropionates and Related Polyketide Metabolites from the Caribbean Region. Antibiotics (Basel) 2023; 12:1087. [PMID: 37508183 PMCID: PMC10376297 DOI: 10.3390/antibiotics12071087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/14/2023] [Accepted: 06/14/2023] [Indexed: 07/30/2023] Open
Abstract
The Caribbean region is a hotspot of biodiversity (i.e., algae, sponges, corals, mollusks, microorganisms, cyanobacteria, and dinoflagellates) that produces secondary metabolites such as polyketides and polypropionates. Polyketides are a diverse class of natural products synthesized by organisms through a biosynthetic pathway catalyzed by polyketide synthase (PKS). This group of compounds is subdivided into fatty acids, aromatics, and polypropionates such as macrolides, and linear and cyclic polyethers. Researchers have studied the Caribbean region to find natural products and focused on isolation, purification, structural characterization, synthesis, and conducting biological assays against parasites, cancer, fungi, and bacteria. These studies have been summarized in this review, including research from 1981 to 2020. This review includes about 90 compounds isolated in the Caribbean that meet the structural properties of polyketides. Out of 90 compounds presented, 73 have the absolute stereochemical configuration, and 82 have shown biological activity. We expect to motivate the researchers to continue exploring the Caribbean region's marine environments to discover and investigate new polyketide and polypropionate natural products.
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Affiliation(s)
- Raúl R. Rodríguez-Berríos
- Department of Chemistry, University of Puerto Rico, Río Piedras Campus, P.O. Box 23346, San Juan PR 00931-3346, Puerto Rico
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Makarieva TN, Ivanchina NV, Stonik VA. Application of Oxidative and Reductive Transformations in the Structure Determination of Marine Natural Products. JOURNAL OF NATURAL PRODUCTS 2020; 83:1314-1333. [PMID: 32091208 DOI: 10.1021/acs.jnatprod.9b01020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This review highlights the application of oxidative and reductive chemical transformations in the structure determination of complex marine natural products, including their absolute configurations. Workability of the Baeyer-Villiger reaction, ozonolysis, periodate oxidation, hydrogenolysis, and reductive amination, as well as other related chemical transformations, are discussed.
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Affiliation(s)
- Tatyana N Makarieva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Pr. 100 let, Vladivostoku, 159, Russia
| | - Natalia V Ivanchina
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Pr. 100 let, Vladivostoku, 159, Russia
| | - Valentin A Stonik
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Pr. 100 let, Vladivostoku, 159, Russia
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5
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Suo R, Takada K, Irie R, Watanabe R, Suzuki T, Ise Y, Ohtsuka S, Okada S, Matsunaga S. Poecillastrin H, a Chondropsin-Type Macrolide with a Conjugated Pentaene Moiety, from a Characella sp. Marine Sponge. JOURNAL OF NATURAL PRODUCTS 2018; 81:1295-1299. [PMID: 29701963 DOI: 10.1021/acs.jnatprod.8b00180] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Poecillastrin H (1), a chondropsin-type macrolide with a conjugated pentaene moiety, was isolated from the Characella sp. marine sponge. The planar structure of 1 was elucidated by analysis of spectroscopic data. The absolute configuration of the β-hydroxyaspartic acid residue (β-OHAsp) was determined to be d- threo by Marfey's analysis, and the mode of lactone ring formation through the OHAsp residue was determined by chemical degradation. Poecillastrin H was extremely sensitive toward light and showed potent cytotoxic activity against 3Y1 cells with an IC50 value of 4.1 nM.
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Affiliation(s)
- Rei Suo
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Bunkyo-ku, Tokyo 113-8657 , Japan
| | - Kentaro Takada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Bunkyo-ku, Tokyo 113-8657 , Japan
| | - Raku Irie
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Bunkyo-ku, Tokyo 113-8657 , Japan
| | - Ryuichi Watanabe
- National Research Institute of Fisheries Science , 2-12-4 Fukuura , Kanazawa, Yokohama 236-8648 , Japan
| | - Toshiyuki Suzuki
- National Research Institute of Fisheries Science , 2-12-4 Fukuura , Kanazawa, Yokohama 236-8648 , Japan
| | - Yuji Ise
- Sugashima Marine Biological Laboratory, Graduate School of Science , Nagoya University , Toba , Mie 517-0004 , Japan
| | - Susumu Ohtsuka
- Takehara Marine Science Station , Hiroshima University , Takehara, Hiroshima 725-0024 , Japan
| | - Shigeru Okada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Bunkyo-ku, Tokyo 113-8657 , Japan
| | - Shigeki Matsunaga
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Bunkyo-ku, Tokyo 113-8657 , Japan
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6
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Irie R, Hitora Y, Ise Y, Okada S, Takada K, Matsunaga S. Poecillastrin E, F, and G, cytotoxic chondropsin-type macrolides from a marine sponge Poecillastra sp. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.01.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Irie R, Takada K, Ise Y, Ohtsuka S, Okada S, Gustafson KR, Matsunaga S. Structure Revision of Poecillastrin C and the Absolute Configuration of the β-Hydroxyaspartic Acid Residue. Org Lett 2017; 19:5395-5397. [PMID: 28956931 DOI: 10.1021/acs.orglett.7b02835] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The planar structure of poecillastrin C (1) was revised through selective reduction of the ester carbon. The absolute configuration of the β-hydroxyaspartic acid (OHAsp) residue was determined to be d-threo by Marfey's analysis. The acid hydrolysate of the reduction product of 1 liberated (2R,3R)-2-amino-3,4-dihydroxybutanoic acid, demonstrating that the β-carboxyl group in poecillastrin C was esterified. The structures of poecillastrins B-D and 73-deoxychondropsin A were also revised.
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Affiliation(s)
- Raku Irie
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo , Bunkyo-ku, Tokyo 113-8657, Japan
| | - Kentaro Takada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo , Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yuji Ise
- Sugashima Marine Biological Laboratory, Nagoya University , Toba, Mie 517-0004, Japan
| | - Susumu Ohtsuka
- Takehara Marine Station, Hiroshima University , Takehara, Hiroshima 725-0024, Japan
| | - Shigeru Okada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo , Bunkyo-ku, Tokyo 113-8657, Japan
| | - Kirk R Gustafson
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute , Frederick, Maryland 21702, United States
| | - Shigeki Matsunaga
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo , Bunkyo-ku, Tokyo 113-8657, Japan
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8
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Calabro K, Kalahroodi EL, Rodrigues D, Díaz C, Cruz MDL, Cautain B, Laville R, Reyes F, Pérez T, Soussi B, Thomas OP. Poecillastrosides, Steroidal Saponins from the Mediterranean Deep-Sea Sponge Poecillastra compressa (Bowerbank, 1866). Mar Drugs 2017; 15:md15070199. [PMID: 28672858 PMCID: PMC5532641 DOI: 10.3390/md15070199] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 06/15/2017] [Accepted: 06/21/2017] [Indexed: 11/29/2022] Open
Abstract
The first chemical investigation of the Mediterranean deep-sea sponge Poecillastra compressa (Bowerbank, 1866) led to the identification of seven new steroidal saponins named poecillastrosides A–G (1–7). All saponins feature an oxidized methyl at C-18 into a primary alcohol or a carboxylic acid. While poecillastrosides A–D (1–4) all contain an exo double bond at C-24 of the side-chain and two osidic residues connected at O-2′, poecillastrosides E–G (5–7) are characterized by a cyclopropane on the side-chain and a connection at O-3′ between both sugar units. The chemical structures were elucidated through extensive spectroscopic analysis (High-Resolution Mass Spectrometry (HRESIMS), 1D and 2D NMR) and the absolute configurations of the sugar residues were assigned after acidic hydrolysis and cysteine derivatization followed by LC-HRMS analyses. Poecillastrosides D and E, bearing a carboxylic acid at C-18, were shown to exhibit antifungal activity against Aspergillus fumigatus.
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Affiliation(s)
- Kevin Calabro
- School of Chemistry, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland.
- Cosmo International Ingredients, 855 avenue du Docteur Maurice Donat, 06250 Mougins, France.
| | - Elaheh Lotfi Kalahroodi
- Géoazur, Université Côte d'Azur, CNRS, OCA, IRD, 250 rue Albert Einstein, 06560 Valbonne, France.
| | - Daniel Rodrigues
- Géoazur, Université Côte d'Azur, CNRS, OCA, IRD, 250 rue Albert Einstein, 06560 Valbonne, France.
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale, CNRS-Aix-Marseille University, IRD-University Avignon, Station Marine d'Endoume, rue de la batterie des lions, 13007 Marseille, France.
| | - Caridad Díaz
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 34, Parque Tecnológico de Ciencias de la Salud, E-18016 Armilla, Granada, Spain.
| | - Mercedes de la Cruz
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 34, Parque Tecnológico de Ciencias de la Salud, E-18016 Armilla, Granada, Spain.
| | - Bastien Cautain
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 34, Parque Tecnológico de Ciencias de la Salud, E-18016 Armilla, Granada, Spain.
| | - Rémi Laville
- Cosmo International Ingredients, 855 avenue du Docteur Maurice Donat, 06250 Mougins, France.
| | - Fernando Reyes
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 34, Parque Tecnológico de Ciencias de la Salud, E-18016 Armilla, Granada, Spain.
| | - Thierry Pérez
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale, CNRS-Aix-Marseille University, IRD-University Avignon, Station Marine d'Endoume, rue de la batterie des lions, 13007 Marseille, France.
| | - Bassam Soussi
- Géoazur, Université Côte d'Azur, CNRS, OCA, IRD, 250 rue Albert Einstein, 06560 Valbonne, France.
- Department of Marine Sciences, University of Gothenburg, P.O. Box 460, SE40530 Gothenburg, Sweden.
- Oman Centre for Marine Biotechnology, P.O. Box 236, PC 103 Muscat, Oman.
| | - Olivier P Thomas
- School of Chemistry, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland.
- Géoazur, Université Côte d'Azur, CNRS, OCA, IRD, 250 rue Albert Einstein, 06560 Valbonne, France.
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9
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Poecillastrin D: A New Cytotoxin of the Chondropsin Class from Marine SpongeJaspis serpentina. Biosci Biotechnol Biochem 2014; 71:2697-700. [DOI: 10.1271/bbb.70293] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Echeverria PG, Prévost S, Cornil J, Férard C, Reymond S, Guérinot A, Cossy J, Ratovelomanana-Vidal V, Phansavath P. Synthetic Strategy toward the C44–C65 Fragment of Mirabalin. Org Lett 2014; 16:2390-3. [DOI: 10.1021/ol500720j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Pierre-Georges Echeverria
- PSL Research University,
Chimie ParisTech - CNRS, Institut de Recherche
de Chimie Paris, 75005 Paris, France
| | - Sébastien Prévost
- PSL Research University,
Chimie ParisTech - CNRS, Institut de Recherche
de Chimie Paris, 75005 Paris, France
| | - Johan Cornil
- Laboratoire
de Chimie Organique, Institute
of Chemistry, Biology and Innovation (CBI) − UMR 8231 −
ESPCI ParisTech/CNRS/PSL* Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Charlène Férard
- PSL Research University,
Chimie ParisTech - CNRS, Institut de Recherche
de Chimie Paris, 75005 Paris, France
| | - Sébastien Reymond
- Laboratoire
de Chimie Organique, Institute
of Chemistry, Biology and Innovation (CBI) − UMR 8231 −
ESPCI ParisTech/CNRS/PSL* Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Amandine Guérinot
- Laboratoire
de Chimie Organique, Institute
of Chemistry, Biology and Innovation (CBI) − UMR 8231 −
ESPCI ParisTech/CNRS/PSL* Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Janine Cossy
- Laboratoire
de Chimie Organique, Institute
of Chemistry, Biology and Innovation (CBI) − UMR 8231 −
ESPCI ParisTech/CNRS/PSL* Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | | | - Phannarath Phansavath
- PSL Research University,
Chimie ParisTech - CNRS, Institut de Recherche
de Chimie Paris, 75005 Paris, France
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11
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Yagafarov NZ, Valeev RF, Bikzhanov RF, Iginasheva EI, Miftakhov MS. 5,5-dimethyl-1,3-dioxan-4-ol as orthogonally protected equivalent of 2,2-dimethyl-3-hydroxypropanal. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2012. [DOI: 10.1134/s1070428012060127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Gillespie TA, Winger BE. Mass spectrometry for small molecule pharmaceutical product development: a review. MASS SPECTROMETRY REVIEWS 2011; 30:479-490. [PMID: 21500245 DOI: 10.1002/mas.20289] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Developing a pharmaceutical product has become increasingly difficult and expensive. With an emphasis on developing project knowledge at an earlier stage in development, the use of information-rich technologies (particularly MS) has continued to expand throughout product development. Continued improvements in LC/MS technology have widened the scope of utilizing MS methods for performing both qualitative and quantitative applications within product development. This review describes a multi-tiered MS strategy designed to enhance and accelerate the identification and profiling of both process- and degradation-related impurities in either the active pharmaceutical ingredient (API) or formulated product. Such impurities can be formed either during chemical synthesis, formulation, or during storage. This review provides an overview of a variety of orthogonal-mass spectrometric methodologies, namely GC/MS, LC/MS, and ICP-MS, in support of product development. This review is not meant to be all inclusive; however, it has been written to highlight the increasing use of hyphenated MS techniques within the pharmaceutical development area.
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Affiliation(s)
- Todd A Gillespie
- Lilly Research Laboratories, A Division of Eli Lilly and Company, Indianapolis, Indiana 46285, USA.
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13
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Abstract
This review covers the 390 novel marine natural products described to date from deep-water (>50 m) marine fauna, with details on the source organism, its depth and country of origin, along with any reported biological activity of the metabolites. Relevant synthetic studies on the deep-sea natural products have also been included.
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Affiliation(s)
- Danielle Skropeta
- School of Chemistry, University of Wollongong, Wollongong, Australia.
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14
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Plaza A, Baker HL, Bewley CA. Mirabalin, [corrected] an antitumor macrolide lactam from the marine sponge Siliquariaspongia mirabilis. JOURNAL OF NATURAL PRODUCTS 2008; 71:473-477. [PMID: 18271553 DOI: 10.1021/np070603p] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A new highly unsaturated macrolide lactam, termed mirabilin ( 1), was isolated from the aqueous extract of the marine sponge Siliquariaspongia mirabilis. Mirabilin is characterized by the presence of a 35-membered macrolide lactam ring bearing a pentadiene conjugated system and a tetrasubstituted tetrahydropyran ring. A linear polyketide moiety is attached to the macrocyclic ring through an amide linkage. The structure of mirabilin was determined using extensive 2D NMR and ESIMS and tandem MS techniques. Mirabilin inhibits the growth of the tumor cell line HCT-116 with an IC 50 value of 0.27 +/- 0.09 microM and is noncytotoxic to several other cell lines.
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Affiliation(s)
- Alberto Plaza
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0820, USA
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15
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16
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Dunlap WC, Battershill CN, Liptrot CH, Cobb RE, Bourne DG, Jaspars M, Long PF, Newman DJ. Biomedicinals from the phytosymbionts of marine invertebrates: A molecular approach. Methods 2007; 42:358-76. [PMID: 17560324 DOI: 10.1016/j.ymeth.2007.03.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Revised: 03/07/2007] [Accepted: 03/09/2007] [Indexed: 11/22/2022] Open
Abstract
Marine invertebrate animals such as sponges, gorgonians, tunicates and bryozoans are sources of biomedicinally relevant natural products, a small but growing number of which are advancing through clinical trials. Most metazoan and anthozoan species harbour commensal microorganisms that include prokaryotic bacteria, cyanobacteria (blue-green algae), eukaryotic microalgae, and fungi within host tissues where they reside as extra- and intra-cellular symbionts. In some sponges these associated microbes may constitute as much as 40% of the holobiont volume. There is now abundant evidence to suggest that a significant portion of the bioactive metabolites thought originally to be products of the source animal are often synthesized by their symbiotic microbiota. Several anti-cancer metabolites from marine sponges that have progressed to pre-clinical or clinical-trial phases, such as discodermolide, halichondrin B and bryostatin 1, are thought to be products derived from their microbiotic consortia. Freshwater and marine cyanobacteria are well recognised for producing numerous and structurally diverse bioactive and cytotoxic secondary metabolites suited to drug discovery. Sea sponges often contain dominant taxa-specific populations of cyanobacteria, and it is these phytosymbionts (= photosymbionts) that are considered to be the true biogenic source of a number of pharmacologically active polyketides and nonribosomally synthesized peptides produced within the sponge. Accordingly, new collections can be pre-screened in the field for the presence of phytobionts and, together with metagenomic screening using degenerate PCR primers to identify key polyketide synthase (PKS) and nonribosomal peptide synthetase (NRPS) genes, afford a biodiscovery rationale based on the therapeutic prospects of phytochemical selection. Additionally, new cloning and biosynthetic expression strategies may provide a sustainable method for the supply of new pharmaceuticals derived from the uncultured phytosymbionts of marine organisms.
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Affiliation(s)
- Walter C Dunlap
- Australian Institute of Marine Science, Townsville, Queensland, Australia.
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17
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Takada K, Choi BW, Rashid MA, Gamble WR, Cardellina JH, Van QN, Lloyd JR, McMahon JB, Gustafson KR. Structural assignment of poecillastrins B and C, macrolide lactams from the deep-water Caribbean sponge Poecillastra species. JOURNAL OF NATURAL PRODUCTS 2007; 70:428-31. [PMID: 17378533 DOI: 10.1021/np0604984] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Two new chondropsin-type macrolide lactams, poecillastrins B (1) and C (2), were isolated from aqueous extracts of the marine sponge Poecillastra sp. These trace metabolites were isolated in low yield (400-600 microg), and their structures were determined primarily by analysis of NMR data acquired using a cyrogenically cooled probe. High-quality 1D and 2D NMR data sets allowed complete assignment of the spectroscopic data and defined the new structures as 35-membered ring analogues of poecillastrin A (3). Compounds 1 and 2 showed potent cytotoxic activity against a human melanoma tumor cell line (LOX) with an IC50 value of less than 1 microg/mL.
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Affiliation(s)
- Kentaro Takada
- Molecular Targets Development Program, Center for Cancer Research, National Cancer Institute, Building 1052, Room 121, Frederick, MD 21702-1201, USA
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Mayer AMS, Gustafson KR. Marine pharmacology in 2001-2: antitumour and cytotoxic compounds. Eur J Cancer 2005; 40:2676-704. [PMID: 15571951 DOI: 10.1016/j.ejca.2004.09.005] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2004] [Revised: 07/30/2004] [Accepted: 09/02/2004] [Indexed: 11/29/2022]
Abstract
During 2001 and 2002, marine antitumour pharmacology research aimed at the discovery of novel antitumour agents was published in 175 peer-reviewed articles. The purpose of this paper is to present a structured Review of the antitumour and cytotoxic properties of 97 marine natural products, many of them novel compounds that belong to diverse structural classes, including polyketides, terpenes, steroids, and peptides. The organisms yielding these bioactive compounds comprise a taxonomically diverse group of marine invertebrate animals, algae, fungi and bacteria. Antitumour pharmacological studies were conducted with 30 structurally characterised natural marine products in a number of experimental and clinical models which further defined their mechanisms of action. Particularly potent in vitro cytotoxicity data generated with murine and human tumour cell lines was reported for 67 novel marine chemicals with as yet undetermined mechanisms of action. Noteworthy, is the fact that marine anticancer research was sustained by a collaborative effort, involving researchers from Australia, Brazil, Canada, Denmark, Egypt, France, Germany, Italy, Japan, Netherlands, New Zealand, The Philippines, Russia, Singapore, South Korea, Thailand, Taiwan, Turkey, Spain, Switzerland, Taiwan, Thailand, Turkey, and the United States. Finally, this 2001-2 overview of the marine pharmacology literature highlights the fact that the discovery of novel marine antitumour agents has continued at the same pace as during 1998, 1999 and 2000.
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Affiliation(s)
- Alejandro M S Mayer
- Department of Pharmacology, Chicago College of Osteopathic Medicine, Midwestern University, 555 31st Street, Downers Grove, IL 60515, USA.
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Bowman EJ, Gustafson KR, Bowman BJ, Boyd MR. Identification of a new chondropsin class of antitumor compound that selectively inhibits V-ATPases. J Biol Chem 2003; 278:44147-52. [PMID: 12944415 DOI: 10.1074/jbc.m306595200] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We identify a new naturally occurring class of inhibitor of vacuolar H+-ATPases (V-ATPases) isolated from vacuolar membranes of Neurospora crassa and from chromaffin granule membranes of Bos taurus. To date, the new class includes six chondropsins and poecillastrin A, large polyketide-derived macrolide lactams with 33-37 membered rings. In the National Cancer Institute's 60-cell screen the chondropsin class showed a tumor cell growth inhibitory fingerprint essentially indistinguishable from that of the bafilomycin/concanamycin and the salicylihalamide/lobatamide classes of well-established V-ATPase inhibitors. Half-maximal inhibition of V-ATPase activity in vitro occurred at 0.04-0.7 microM for the fungal vacuolar V-ATPase and at 0.4 to >10 microM for the chromaffin granule V-ATPase. Thus, the new inhibitors are somewhat less potent than the other two classes, which typically have Ki values of <10 nM for V-ATPases, and the new inhibitors differ from the other two classes in their specificity. The bafilomycin class inhibits all eucaryotic V-ATPases, the salicylihalamide class inhibits mammalian V-ATPases but not fungal V-ATPases, and the new chondropsin class inhibits the N. crassa V-ATPase better than the chromaffin granule V-ATPase. Two mutations in the N. crassa V-ATPase that affect the binding of bafilomycin had small but reproducible effects on the affinity of chondropsins for the V-ATPase, suggesting the possibility of a similar mechanism of inhibition.
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Affiliation(s)
- Emma Jean Bowman
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, California 95064, USA.
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Abstract
Flow NMR techniques are now well accepted and widely used in many areas of drug discovery. Although natural-product-, rational-drug-design-, and NMR-screening-programs have begun to use flow NMR more routinely, flow NMR has not yet gained widespread acceptance in combinatorial chemistry, even though it has been shown to be a potentially useful tool. Recent developments in DI-NMR, FIA-NMR, and LC-NMR will help flow NMR eventually gain a wider acceptance within combinatorial chemistry. These developments include LC-NMR-MS instrumentation, flow probe improvements, new pulse sequences, improved automation of NMR data analysis, and the application of flow NMR to related fields in drug discovery.
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Affiliation(s)
- Paul A Keifer
- University of Nebraska Medical Center/Eppley Institute, 986805 Nebraska Medical Center, Omaha, NE 68198-6805, USA.
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