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Wamalwa L, Cheseto X, Ouna E, Kaplan F, Maniania N, Machuka J, Torto B, Ghislain M. Toxic Ipomeamarone accumulation in healthy parts of Sweetpotato (Ipomoea batatas L. Lam) storage roots upon infection by Rhizopus stolonifer. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:335-42. [PMID: 25418792 PMCID: PMC4298358 DOI: 10.1021/jf504702z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Furanoterpenoid accumulation in response to microbial attack in rotting sweetpotatoes has long been linked to deaths and lung edema of cattle in the world. However, it is not known whether furanoterpenoid ipomeamarone accumulates in the healthy-looking parts of infected sweetpotato storage roots. This is critical for effective utilization as animal feed and assessment of the potential negative impact on human health. Therefore, we first identified the fungus from infected sweetpotatoes as a Rhizopus stolonifer strain and then used it to infect healthy sweetpotato storage roots for characterization of furanoterpenoid content. Ipomeamarone and its precursor, dehydroipomeamarone, were identified through spectroscopic analyses, and detected in all samples and controls at varying concentrations. Ipomeamarone concentration was at toxic levels in healthy-looking parts of some samples. Our study provides fundamental information on furanoterpenoids in relation to high levels reported that could subsequently affect cattle on consumption and high ipomeamarone levels in healthy-looking parts.
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Affiliation(s)
- Lydia
N. Wamalwa
- International
Potato Centre, P.O. Box 25171-00603, Nairobi, Kenya
- Kenyatta
University, P.O. Box
43844-00100, Nairobi, Kenya
| | - Xavier Cheseto
- International
Centre of Insect Physiology and Ecology (ICIPE)-African Insect Science
for Food and Health, P.O. Box 30772-00100, Nairobi, Kenya
| | - Elizabeth Ouna
- International
Centre of Insect Physiology and Ecology (ICIPE)-African Insect Science
for Food and Health, P.O. Box 30772-00100, Nairobi, Kenya
| | - Fatma Kaplan
- Department
of Biology, University of Florida, Gainesville, Florida 32611, United States
- Kaplan Schiller
Research, LLC., Gainesville, Florida 32604, United
States
| | - Nguya
K. Maniania
- International
Centre of Insect Physiology and Ecology (ICIPE)-African Insect Science
for Food and Health, P.O. Box 30772-00100, Nairobi, Kenya
| | - Jesse Machuka
- Kenyatta
University, P.O. Box
43844-00100, Nairobi, Kenya
| | - Baldwyn Torto
- International
Centre of Insect Physiology and Ecology (ICIPE)-African Insect Science
for Food and Health, P.O. Box 30772-00100, Nairobi, Kenya
| | - Marc Ghislain
- International
Potato Centre, P.O. Box 25171-00603, Nairobi, Kenya
- E-mail: . Phone: 254 (020) 4223641. Fax: 254 (020 4223600)
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Sugimura T, Mitani E, Tei T, Okuyama T, Kamiya K, Matsui T, Shigeta Y. Temperature-Independent Stereoselectivity in Intramolecular Cycloaddition of Ketene Generated from Diazoester in Solution and in Vapor Phase: How Entropy Term Governs the Selectivity. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2012. [DOI: 10.1246/bcsj.20110337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Eigo Mitani
- Graduate School of Material Science, University of Hyogo
| | - Takahiro Tei
- Graduate School of Material Science, University of Hyogo
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Kamiya K, Matsui T, Sugimura T, Shigeta Y. Theoretical Insight into Stereoselective Reaction Mechanisms of 2,4-Pentanediol-Tethered Ketene-Olefin [2 + 2] Cycloaddition. J Phys Chem A 2012; 116:1168-75. [DOI: 10.1021/jp211542m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Katsumasa Kamiya
- Graduate School
of Pure and
Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8571, Japan
| | - Toru Matsui
- Department of Materials
Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka
560-8531, Japan
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka
560-0043, Japan
| | - Takashi Sugimura
- Graduate
School of Material
Science, University of Hyogo, 3-2-1, Kohto,
Kamigori, Hyogo 678-1297, Japan
| | - Yasuteru Shigeta
- Department of Materials
Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka
560-8531, Japan
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Yecheng D, Zhen Y, Yanzhen Y, Xiulian B. Inhibitory activity against plant pathogenic fungi of extracts from Myoporum bontioides A. Gray and indentification of active ingredients. PEST MANAGEMENT SCIENCE 2008; 64:203-207. [PMID: 18069657 DOI: 10.1002/ps.1491] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND In order to understand the bioactivity of Myoporum bontioides A. Gray against plant pathogens and determine its active ingredients, the inhibitory activities of methanol extracts from M. bontioides against Fusarium oxysporum f. sp. niveum (E. F. Smith) Snyder & Hansen, Pestalotia mangiferae P. Henn., Thielaviopsis paradoxa (De Seynes) v. Hohnel, Colletotrichum musae (Berk. & M. A. Curtis) v. Arx, Alternaria alternata (Fr.) Keissler, Mycosphaerella sentina (Fr.) Schroter and Sphaceloma fawcettii Jenk. were evaluated using a growth rate method, and the active ingredient was isolated by activity-directed isolation and identified by determination and analysis of IR, (1)H NMR, (13)C NMR and mass spectra and correlative physical constants. RESULTS The results showed that the extracts from stems and leaves of M. bontioides exhibited inhibitory activity against the seven fungi, with > 58% inhibition at 10 g L(-1) after 72 h. The active compound was isolated and identified as (-)-epingaione, and showed inhibitory activity against the above seven fungi. The inhibitory activity against P. mangiferae was the highest, with an EC(50) value of 77 mg L(-1). The EC(50) values against the other six fungi were 147-245 mg L(-1). (-)-Epingaione also inhibited spore germination of F. oxysporum f. sp. niveum, T. paradoxa and S. fawcettii. CONCLUSION (-)-Epingaione demonstrated broad-spectrum inhibitory activity against plant pathogenic fungi and is promising for exploitation as a fungicide.
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Affiliation(s)
- Deng Yecheng
- College of Life Science, Guangxi Normal University, Guilin 541004, People's Republic of China.
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Smith JE, Tucker D, Watson K, Jones GL. Identification of antibacterial constituents from the indigenous Australian medicinal plant Eremophila duttonii F. Muell. (Myoporaceae). JOURNAL OF ETHNOPHARMACOLOGY 2007; 112:386-93. [PMID: 17485184 DOI: 10.1016/j.jep.2007.03.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2006] [Revised: 03/10/2007] [Accepted: 03/26/2007] [Indexed: 05/15/2023]
Abstract
This paper reports on the isolation and identification of antibacterial constituents from the indigenous Australian medicinal plant Eremophila duttonii F. Muell. (Myoporaceae). Preparations derived from this plant are used by indigenous populations in the topical treatment of minor wounds, otitis and ocular complaints, and as a gargle for sore throat. Several authors have reported extracts of this plant to effect rapid bacteriolysis and inhibit growth of a wide range of Gram-positive micro-organisms. In other studies involving screening of native medicinal plants for antibacterial activity, extracts of Eremophila duttonii have been reported to consistently exhibit the highest potency amongst all species included. From a hexane extract, we identified two diterpenes of the serrulatane class, the principal constituents responsible for antibacterial activity and present as major constituents of the resinous leaf cuticle: serrulat-14-en-7,8,20-triol (1) and serrulat-14-en-3,7,8,20-tetraol (2). In addition, a hydroxylated furanosesquiterpene with mild antibacterial activity which appeared to be a novel compound was isolated from the extract and tentatively identified as 4-hydroxy-4-methyl-1-(2,3,4,5-tetrahydro-5-methyl[2,3'-bifuran]-5-yl) pentan-2-one. Minimum inhibitory concentrations for each of the compounds against three Gram-positive bacteria: Staphylococcus aureus (ATCC 29213), Staphylococcus epidermidis (ATCC 12228) and Streptococcus pneumoniae (ARL 10582), were determined using a micro-titre plate broth dilution assay.
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Affiliation(s)
- Joshua E Smith
- School of Biological, Biomedical and Molecular Sciences, University of New England, Armidale NSW 2351, Australia.
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Palombo E, Audran G, Monti H. Straightforward enantioselective synthesis of (+)-ancistrofuran. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.07.087] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tei T, Sugimura T, Katagiri T, Tai A, Okuyama T. Application of modified hydroxyl-directed diastereodifferentiating Simmons–Smith reaction to an unreactive conjugated triene. Stereocontrolled tandem cyclopropanation–Cope rearrangement–cyclopropanation. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0957-4166(01)00479-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Cabrera G, Fiaschi R, Napolitano E. Triisobutylaluminun (TIBA) as a reagent to convert 2,2-dimethoxyalkanes to 2-methoxy-1-alkenes. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01141-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lipase mediated resolution of 1,3-butanediol derivatives: chiral building blocks for pheromone enantiosynthesis. Part 3. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0957-4166(01)00038-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Liska R. Novel Photocleavable Structures I: Synthesis of Hydroxyalkylphenone Analogues Electron-rich Heterocycles. HETEROCYCLES 2001. [DOI: 10.3987/com-01-9241] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Asymmetric Baeyer-Villiger reaction: Diastereodifferentiating peracid oxidation of chiral acetal in the presence of Lewis acid. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01338-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Stien D, Samy R, Nouguier R, Crich D, Bertrand MP. Designed Chiral Acyl Radical Equivalents. Preparation and Cyclizations of Disymmetrically Substituted 1,3-Dioxabicyclo[4.4.0]decan-2-yl Radicals. J Org Chem 1997; 62:275-286. [PMID: 11671399 DOI: 10.1021/jo961750n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The diastereoselectivity of 5-exo-trigonal cyclizations of 2-(4-penten-1-yl)-1,3-dioxolan-2-yl and 2-(4-penten-1-yl)-1,3-dioxan-2-yl radicals is investigated. When dioxolanes or dioxanes derived from C(2) symmetrically substituted diols are employed the diastereoselectivity is poor. In the dioxanyl series this is a consequence of the cyclization occurring through a twist-boat conformer. Disymmetrically substituted dioxanyl radicals, derived from the alcohols 21 and 41, are, however, constrained to chairlike conformations and accordingly give rise to highly diastereoselective cyclizations. Conditions are described for the hydrolysis of the resulting spiroacetals and for determination of the ee of the resulting 2-methylcyclopentanones.
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Affiliation(s)
- D. Stien
- LCMO, Associé au CNRS, Faculté des Sciences Saint-Jérôme, Av. Normandie-Niemen, 13397 Marseille Cedex 20, France, and Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061
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Cumming JN, Ploypradith P, Posner GH. Antimalarial activity of artemisinin (qinghaosu) and related trioxanes: mechanism(s) of action. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 1996; 37:253-97. [PMID: 8891104 DOI: 10.1016/s1054-3589(08)60952-7] [Citation(s) in RCA: 158] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- J N Cumming
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, USA
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