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Wennrich JP, Sepanian E, Ebada SS, Llanos-Lopez NA, Ashrafi S, Maier W, Kurtán T, Stadler M. Bioactive Naphtho-α-Pyranones from Two Endophytic Fungi of the Genus Polyphilus. Antibiotics (Basel) 2023; 12:1273. [PMID: 37627693 PMCID: PMC10451773 DOI: 10.3390/antibiotics12081273] [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: 07/17/2023] [Revised: 07/29/2023] [Accepted: 07/31/2023] [Indexed: 08/27/2023] Open
Abstract
In the course of our survey to study the metabolic potential of two species of a new helotialean genus Polyphilus, namely P. frankenii and P. sieberi, their crude extracts were obtained using different cultivation techniques, which led to the isolation and characterization of two new naphtho-α-pyranone derivatives recognized as a monomer (1) and its 6,6'-homodimer (2) together with two known diketopiperazine congeners, outovirin B (3) and (3S,6S)-3,6-dibenzylpiperazine-2,5-dione (4). The structures of isolated compounds were determined based on extensive 1D and 2D NMR and HRESIMS. The absolute configuration of new naphtho-α-pyranones was determined using a comparison of their experimental ECD spectra with those of related structural analogues. 6,6'-binaphtho-α-pyranone talaroderxine C (2) exhibited potent cytotoxic activity against different mammalian cell lines with IC50 values in the low micromolar to nanomolar range. In addition, talaroderxine C unveiled stronger antimicrobial activity against Bacillus subtilis rather than Staphylococcus aureus with MIC values of 0.52 µg mL-1 (0.83 µM) compared to 66.6 µg mL-1 (105.70 µM), respectively.
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Affiliation(s)
- Jan-Peer Wennrich
- Department of Microbial Drugs, Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (J.-P.W.); (E.S.); (N.A.L.-L.)
- Institute of Microbiology, Technische Universität Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany
| | - Ellen Sepanian
- Department of Microbial Drugs, Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (J.-P.W.); (E.S.); (N.A.L.-L.)
| | - Sherif S. Ebada
- Department of Microbial Drugs, Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (J.-P.W.); (E.S.); (N.A.L.-L.)
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt
| | - Natalia A. Llanos-Lopez
- Department of Microbial Drugs, Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (J.-P.W.); (E.S.); (N.A.L.-L.)
| | - Samad Ashrafi
- Institute for Epidemiology and Pathogen Diagnostics, Julius Kühn Institute (JKI)—Federal Research Centre for Cultivated Plants, Messeweg 11-12, 38104 Braunschweig, Germany; (S.A.); (W.M.)
- Institute for Crop and Soil Science, Julius Kühn Institute (JKI)—Federal Research Centre for Cultivated Plants, Bundesallee 58, 38116 Braunschweig, Germany
| | - Wolfgang Maier
- Institute for Epidemiology and Pathogen Diagnostics, Julius Kühn Institute (JKI)—Federal Research Centre for Cultivated Plants, Messeweg 11-12, 38104 Braunschweig, Germany; (S.A.); (W.M.)
| | - Tibor Kurtán
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, 4002 Debrecen, Hungary;
| | - Marc Stadler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (J.-P.W.); (E.S.); (N.A.L.-L.)
- Institute of Microbiology, Technische Universität Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany
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Preliminary Structure-Activity Relationship Study of the MMV Pathogen Box Compound MMV675968 (2,4-Diaminoquinazoline) Unveils Novel Inhibitors of Trypanosoma brucei brucei. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196574. [PMID: 36235118 PMCID: PMC9571290 DOI: 10.3390/molecules27196574] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/23/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022]
Abstract
New drugs are urgently needed for the treatment of human African trypanosomiasis (HAT). In line with our quest for novel inhibitors of trypanosomes, a small library of analogs of the antitrypanosomal hit (MMV675968) available at MMV as solid materials was screened for antitrypanosomal activity. In silico exploration of two potent antitrypanosomal structural analogs (7-MMV1578647 and 10-MMV1578445) as inhibitors of dihydrofolate reductase (DHFR) was achieved, together with elucidation of other antitrypanosomal modes of action. In addition, they were assessed in vitro for tentative inhibition of DHFR in a crude trypanosome extract. Their ADMET properties were also predicted using dedicated software. Overall, the two diaminoquinazoline analogs displayed approximately 40-fold and 60-fold more potency and selectivity in vitro than the parent hit, respectively (MMV1578445 (10): IC50 = 0.045 µM, SI = 1737; MMV1578467 (7): IC50 = 0.06 µM; SI = 412). Analogs 7 and 10 were also strong binders of the DHFR enzyme in silico, in all their accessible protonation states, and interacted with key DHFR ligand recognition residues Val32, Asp54, and Ile160. They also exhibited significant activity against trypanosome protein isolate. MMV1578445 (10) portrayed fast and irreversible trypanosome growth arrest between 4–72 h at IC99. Analogs 7 and 10 induced in vitro ferric iron reduction and DNA fragmentation or apoptosis induction, respectively. The two potent analogs endowed with predicted suitable physicochemical and ADMET properties are good candidates for further deciphering their potential as starting points for new drug development for HAT.
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Abstract
Natural products are constructed by organisms in impressive ways through various highly selective enzyme-catalyzed chemical reactions. Over the past century, there has been considerable interest in understanding and emulating the underlying biosynthetic logic for the target molecule. The successful implementation of a biomimetic strategy usually has some uniquely valuable benefits over other abiotic routes in total synthesis by (1) corroborating the chemical feasibility of a given biogenetic hypothesis and further unraveling some insightful implications for future biosynthetic studies and (2) providing remarkably more concise access to not only the original synthetic target but also diversified biogenetically related congeners, which may result in either the structural reassignment of previously disclosed natural products or the anticipation of undiscovered natural products. However, for the devised essential biomimetic transformation, fine-tuning the optimization of the substrates and the reaction conditions can sometimes be painstakingly challenging. Turning to nature for inspiration can provide additional impetus for methodological innovations.Previously used as oral veterinary drugs, lankacidins have potential as next-generation antibiotics to tackle the problems caused by multidrug-resistant bacteria with novel modes of action (MoAs). The hypersensitive and densely functionalized lactonic core within this family of macrocyclic polyketides poses a formidable challenge for chemical total synthesis and derivatization. In this account, we summarized the evolution of a unified biomimetic approach toward 10 lankacidin antibiotics and their linear biosynthetic intermediates in the longest linear 7-12 steps from readily available starting materials. Our endeavor commenced with an intermolecular bioinspired amido sulfone-based Mannich reaction approach to assemble 2 advanced fragments under mild biphasic organocatalytic conditions. It successfully gave rise to stereodivergent access to 4 C2/C18-isomeric lankacyclinols but failed to efficiently deliver lactone-containing congeners through Stille macrocyclization. Facilitated by the thermolysis chemistry of N,O-acetal to generate the requisite N-acyl-1-azahexatriene species, we realized the projected Mannich macrocyclization and eight macrocyclic lankacidins can be produced by orchestrated desilylative manipulations. In this process, we were able to perform structural reassignments of isolankacidinol (7 to 50) and isolankacyclinol (104 to 83) and, for the first time, elucidate the natural occurrence of 2,18-bis-epi-lankacyclinol (84). Moreover, the inability of the current biomimetic route to cofurnish the reported structure of 2,18-seco-lankacidinol A (15) triggered a proposed structural revision that is rooted in reconsidered biogenesis and was confirmed by a divergent synthesis that enabled us to identify the correct isomer (116). Finally, the modular, diversity-oriented design also provided streamlined entries to acyclic 2,18-seco-lankacidinol B (120) and the biosynthetic intermediate LC-KA05 (17) together with its C7-O-deacetylated congeners in all C4/C5-stereochemical variations (18, 127-129), culminating in a need for structural revision to the six-membered lactonic segment in LC-KA05-2. The selection and execution of biomimetic strategies in lankacidin total synthesis give rise to all the previously mentioned advantages at the current stage. The modular-based, late-stage diversified complex construction offers an exceptionally high level of synthetic flexibility for future synthetic forays toward newly isolated or chemically modified congeners within the lankacidin family.
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Affiliation(s)
- Kuan Zheng
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, PR China
| | - Ran Hong
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, PR China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, PR China
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Zheng K, Hong R. Total synthesis of LC-KA05, the proposed structure of LC-KA05-2, and 2,18-seco-lankacidinol B: A quest to revisit lankacidin biosynthesis. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Yasui M, Hanaya K, Sugai T, Higashibayashi S. Metal-free thermal organocatalytic pinacol coupling of arylaldehydes using an isonicotinate catalyst with bis(pinacolato)diboron. RSC Adv 2021; 11:24652-24655. [PMID: 35481014 PMCID: PMC9036917 DOI: 10.1039/d1ra04443e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 07/07/2021] [Indexed: 01/12/2023] Open
Abstract
The metal and light-free thermal organocatalytic pinacol coupling of arylaldehydes has been developed.
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Affiliation(s)
| | - Kengo Hanaya
- Faculty of Pharmacy
- Keio University
- Tokyo 105-8512
- Japan
| | - Takeshi Sugai
- Faculty of Pharmacy
- Keio University
- Tokyo 105-8512
- Japan
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Zheng K, Shen D, Zhang B, Hong R. Stereodivergent Synthesis of Lankacyclinol and Its C2/C18-Congeners Enabled by a Bioinspired Mannich Reaction. J Org Chem 2020; 86:10991-11005. [DOI: 10.1021/acs.joc.0c02443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Kuan Zheng
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Defeng Shen
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Bingbing Zhang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, People’s Republic of China
| | - Ran Hong
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
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Zheng K, Shen D, Zhang B, Hong R. Landscape of Lankacidin Biomimetic Synthesis: Structural Revisions and Biogenetic Implications. J Org Chem 2020; 85:13818-13836. [PMID: 32985194 DOI: 10.1021/acs.joc.0c01930] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In this report, a unified biomimetic approach to all known macrocyclic lankacidins is presented. By taking advantage of the thermolysis of N,O-acetal to generate the requisite N-acyl-1-azahexatriene species, we eventually realized the biomimetic Mannich macrocyclization, from which all of the macrocyclic lankacidins can be conquered by orchestrated desilylation. The reassignments of the reported structures of isolankacidinol (7 to 10) and the discovery of a recently isolated "lankacyclinol" found to be in fact 2,18-bis-epi-lankacyclinol (72) unraveled the previously underappreciated chemical diversity exhibited by the enzymatic macrocyclization. In addition, the facile elimination/decarboxylation/protonation process for the depletion of C1 under basic conditions resembling a physiological environment may implicate more undiscovered natural products with variable C2/C18 stereochemistries (i.e., 62, 73, and 75). The notable aspect provided by a biomimetic strategy is significantly reducing the step count compared with the two previous entries to macrocyclic lankacidins.
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Affiliation(s)
- Kuan Zheng
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Defeng Shen
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Bingbing Zhang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.,University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Ran Hong
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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Cai L, Yao Y, Yeon SK, Seiple IB. Modular Approaches to Lankacidin Antibiotics. J Am Chem Soc 2020; 142:15116-15126. [PMID: 32786797 DOI: 10.1021/jacs.0c06648] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Lankacidins are a class of polyketide natural products isolated from Streptomyces spp. that show promising antimicrobial activity. Owing to their complex molecular architectures and chemical instability, structural assignment and derivatization of lankacidins are challenging tasks. Herein we describe three fully synthetic approaches to lankacidins that enable access to new structural variability within the class. We use these routes to systematically generate stereochemical derivatives of both cyclic and acyclic lankacidins. Additionally, we access a new series of lankacidins bearing a methyl group at the C4 position, a modification intended to increase chemical stability. In the course of this work, we discovered that the reported structures for two natural products of the lankacidin class were incorrect, and we determine the correct structures of 2,18-seco-lankacidinol B and iso-lankacidinol. We also evaluate the ability of several iso- and seco-lankacidins to inhibit the growth of bacteria and to inhibit translation in vitro. This work grants insight into the rich chemical complexity of this class of antibiotics and provides an avenue for further structural derivatization.
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Affiliation(s)
- Lingchao Cai
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jinagsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, 210037 Jiangsu, China.,Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California at San Francisco, San Francisco, California 94158, United States
| | - Yanmin Yao
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California at San Francisco, San Francisco, California 94158, United States
| | - Seul Ki Yeon
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California at San Francisco, San Francisco, California 94158, United States
| | - Ian B Seiple
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California at San Francisco, San Francisco, California 94158, United States
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Zheng K, Hong R. Postulated Biogenesis-Guided Total Synthesis and Structural Revision of 2,18-seco-Lankacidinol A. Org Lett 2020; 22:3785-3788. [DOI: 10.1021/acs.orglett.0c00993] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Kuan Zheng
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Ran Hong
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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10
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Tannous J, Keller NP, Atoui A, El Khoury A, Lteif R, Oswald IP, Puel O. Secondary metabolism in Penicillium expansum: Emphasis on recent advances in patulin research. Crit Rev Food Sci Nutr 2017; 58:2082-2098. [DOI: 10.1080/10408398.2017.1305945] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Joanna Tannous
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, 1550 Linden Dr., Madison, Wisconsin, USA
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS, Toulouse, France
- Université Saint-Joseph, Centre d'Analyses et de Recherche, Unité de Technologie et Valorisation Alimentaire, Campus des Sciences et Technologies, Mar Roukos, Mkallès, Riad El Solh, Beirut, Lebanon
| | - Nancy P. Keller
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, 1550 Linden Dr., Madison, Wisconsin, USA
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Ali Atoui
- Laboratory of Microorganisms and Food Irradiation, Lebanese Atomic Energy Commission-CNRS, Riad El Solh, Beirut, Lebanon
- Laboratory of Microbiology, Department of Biology, Faculty of Sciences, Lebanese University, Hadath Campus, Beirut, Lebanon
| | - André El Khoury
- Université Saint-Joseph, Centre d'Analyses et de Recherche, Unité de Technologie et Valorisation Alimentaire, Campus des Sciences et Technologies, Mar Roukos, Mkallès, Riad El Solh, Beirut, Lebanon
| | - Roger Lteif
- Université Saint-Joseph, Centre d'Analyses et de Recherche, Unité de Technologie et Valorisation Alimentaire, Campus des Sciences et Technologies, Mar Roukos, Mkallès, Riad El Solh, Beirut, Lebanon
| | - Isabelle P. Oswald
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Olivier Puel
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS, Toulouse, France
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Kajula M, Ward JM, Turpeinen A, Tejesvi MV, Hokkanen J, Tolonen A, Häkkänen H, Picart P, Ihalainen J, Sahl HG, Pirttilä AM, Mattila S. Bridged Epipolythiodiketopiperazines from Penicillium raciborskii, an Endophytic Fungus of Rhododendron tomentosum Harmaja. JOURNAL OF NATURAL PRODUCTS 2016; 79:685-690. [PMID: 27057690 DOI: 10.1021/np500822k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Three new epithiodiketopiperazine natural products [outovirin A (1), outovirin B (2), and outovirin C (3)] resembling the antifungal natural product gliovirin have been identified in extracts of Penicillium raciborskii, an endophytic fungus isolated from Rhododendron tomentosum. The compounds are unusual for their class in that they possess sulfide bridges between α- and β-carbons rather than the typical α-α bridging. To our knowledge, outovirin A represents the first reported naturally produced epimonothiodiketopiperazine, and antifungal outovirin C is the first reported trisulfide gliovirin-like compound. This report describes the identification and structural elucidation of the compounds by LC-MS/MS and NMR.
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Affiliation(s)
- Marena Kajula
- Admescope Ltd. , Typpitie 1, Oulu, Finland , FIN-90620
| | | | | | | | - Juho Hokkanen
- Admescope Ltd. , Typpitie 1, Oulu, Finland , FIN-90620
| | - Ari Tolonen
- Admescope Ltd. , Typpitie 1, Oulu, Finland , FIN-90620
| | - Heikki Häkkänen
- Nanoscience Center, Department of Biological and Environmental Science, University of Jyväskylä , P.O. Box 35, Jyväskylä, Finland , FIN-40014
| | - Pere Picart
- Department of Pharmaceutical Microbiology, Institute for Medical Microbiology and Immunology , Meckenheimer Allee 168, 53115 Bonn, Germany
| | - Janne Ihalainen
- Nanoscience Center, Department of Biological and Environmental Science, University of Jyväskylä , P.O. Box 35, Jyväskylä, Finland , FIN-40014
| | - Hans-Georg Sahl
- Department of Pharmaceutical Microbiology, Institute for Medical Microbiology and Immunology , Meckenheimer Allee 168, 53115 Bonn, Germany
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Lacoske M, Theodorakis EA. Spirotetronate polyketides as leads in drug discovery. JOURNAL OF NATURAL PRODUCTS 2015; 78:562-75. [PMID: 25434976 PMCID: PMC4380204 DOI: 10.1021/np500757w] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Indexed: 05/05/2023]
Abstract
The discovery of chlorothricin (1) defined a new family of microbial metabolites with potent antitumor antibiotic properties collectively referred to as spirotetronate polyketides. These microbial metabolites are structurally distinguished by the presence of a spirotetronate motif embedded within a macrocyclic core. Glycosylation at the periphery of this core contributes to the structural complexity and bioactivity of this motif. The spirotetronate family displays impressive chemical structures, potent bioactivities, and significant pharmacological potential. This review groups the family members based on structural and biosynthetic considerations and summarizes synthetic and biological studies that aim to elucidate their mode of action and explore their pharmacological potential.
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Affiliation(s)
- Michelle
H. Lacoske
- Department of Chemistry and
Biochemistry, University of California,
San Diego, 9500 Gilman
Drive, La Jolla, California 92093-0358, United States
| | - Emmanuel A. Theodorakis
- Department of Chemistry and
Biochemistry, University of California,
San Diego, 9500 Gilman
Drive, La Jolla, California 92093-0358, United States
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Simonetti SO, Larghi EL, Bracca ABJ, Kaufman TS. Angular tricyclic benzofurans and related natural products of fungal origin. Isolation, biological activity and synthesis. Nat Prod Rep 2013; 30:941-69. [PMID: 23719995 DOI: 10.1039/c3np70014c] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Naturally-occurring angular tricyclic benzofuran/isobenzofuran derivatives of fungal origin and related compounds, in which two heterocyclic rings are fused to a central benzenoid moiety, are covered. Emphasis is placed on the structure of the compounds, together with their relevant biological activities, source microorganisms, country or region of origin and environmental conditions. In addition, proposed biosynthetic pathways, as well as the total syntheses of some of the compounds, including those that lead to structural revision or to correct stereochemical assignments, and related synthetic efforts, are discussed in detail.
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Affiliation(s)
- Sebastián O Simonetti
- Instituto de Química Rosario-CONICET-UNR, Suipacha 531, S2002LRK, Rosario, SF, Argentina
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Ishiyama A, Otoguro K, Iwatsuki M, Namatame M, Nishihara-Tsukashima A, Takahashi Y, Onodera H, Yamada H, Ōmura S. In vitro antitrypanosomal activity of five low-MW antibiotics. J Antibiot (Tokyo) 2011; 65:113-4. [DOI: 10.1038/ja.2011.118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Otoguro K, Iwatsuki M, Ishiyama A, Namatame M, Nishihara-Tukashima A, Kiyohara H, Hashimoto T, Asakawa Y, Omura S, Yamada H. In vitro antitrypanosomal activity of plant terpenes against Trypanosoma brucei. PHYTOCHEMISTRY 2011; 72:2024-2030. [PMID: 21843897 DOI: 10.1016/j.phytochem.2011.07.015] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Revised: 07/05/2011] [Accepted: 07/18/2011] [Indexed: 05/31/2023]
Abstract
During the course of screening to discover antitrypanosomal compounds, 24 known plant terpenes (6 sesquiterpenes, 14 sesquiterpene lactones and 4 diterpenes) were evaluated for in vitro antitrypanosomal activity against Trypanosoma brucei brucei. Among them, 22 terpenes exhibited antitrypanosomal activity. In particular, α-eudesmol, hinesol, nardosinone and 4-peroxy-1,2,4,5-tetrahydro-α-santonin all exhibited selective and potent antitrypanosomal activities in vitro. Detailed here in an in vitro antitrypanosomal properties and cytotoxicities of the 24 terpenes compared with two therapeutic antitrypanosomal drugs (eflornithine and suramin). This finding represents the first report of promising trypanocidal activity of these terpenes. Present results also provide some valuable insight with regard to structure-activity relationships and the possible mode of action of the compounds.
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Affiliation(s)
- Kazuhiko Otoguro
- Research Center for Tropical Diseases, Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan.
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Otoguro K, Ishiyama A, Iwatsuki M, Namatame M, Nishihara-Tukashima A, Kiyohara H, Hashimoto T, Asakawa Y, Ōmura S, Yamada H. In vitro antitrypanosomal activity of bis(bibenzyls)s and bibenzyls from liverworts against Trypanosoma brucei. J Nat Med 2011; 66:377-82. [DOI: 10.1007/s11418-011-0587-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Accepted: 08/26/2011] [Indexed: 11/28/2022]
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