1
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Paciotti GF, Zhao J, Cao S, Brodie PJ, Tamarkin L, Huhta M, Myer LD, Friedman J, Kingston DGI. Synthesis and Evaluation of Paclitaxel-Loaded Gold Nanoparticles for Tumor-Targeted Drug Delivery. Bioconjug Chem 2016; 27:2646-2657. [PMID: 27689882 DOI: 10.1021/acs.bioconjchem.6b00405] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The synthesis of a series of thiolated paclitaxel analogs is described as part of a novel nanomedicine program aimed at developing formulations of paclitaxel that will bind to gold nanoparticles for tumor targeted drug delivery. Preliminary evaluation of the new nanomedicine composed of 27 nm gold nanoparticles, tumor necrosis factor alpha (TNFα), thiolated polyethylene glycol (PEG-thiol), and one of several thiolated paclitaxel analogs is presented.
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Affiliation(s)
- Giulio F Paciotti
- CytImmune Sciences Inc. , 15010 Broschart Road, Rockville, Maryland 20850, United States
| | - Jielu Zhao
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech , Blacksburg, Virginia 24061, United States
| | - Shugeng Cao
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech , Blacksburg, Virginia 24061, United States
| | - Peggy J Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech , Blacksburg, Virginia 24061, United States
| | - Lawrence Tamarkin
- CytImmune Sciences Inc. , 15010 Broschart Road, Rockville, Maryland 20850, United States
| | - Marja Huhta
- CytImmune Sciences Inc. , 15010 Broschart Road, Rockville, Maryland 20850, United States
| | - Lonnie D Myer
- CytImmune Sciences Inc. , 15010 Broschart Road, Rockville, Maryland 20850, United States
| | - Jay Friedman
- CytImmune Sciences Inc. , 15010 Broschart Road, Rockville, Maryland 20850, United States
| | - David G I Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech , Blacksburg, Virginia 24061, United States
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2
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Rasamison VE, Brodie PJ, Merino EF, Cassera MB, Ratsimbason MA, Rakotonandrasana S, Rakotondrafara A, Rafidinarivo E, Kingston DGI, Rakotondraibe HL. Furoquinoline Alkaloids and Methoxyflavones from the Stem Bark of Melicope madagascariensis (Baker) T.G. Hartley. Nat Prod Bioprospect 2016; 6:261-265. [PMID: 27655634 PMCID: PMC5080208 DOI: 10.1007/s13659-016-0106-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 08/30/2016] [Indexed: 06/06/2023]
Abstract
Melicope madagascariensis (Rutaceae) is an endemic plant species of Madagascar that was first classified as a member of the genus Euodia J. R. & G. Forst (Rutaceae) under the scientific name Euodia madagascariensis Baker. Based on morphological characteristics, Thomas Gordon Hartley taxonomically revised E. madagascariensis Baker to be M. madagascariensis (Baker) T.G. Hartley. Chemotaxonomical studies have long been used to help the identification and confirmation of taxonomical classification of plant species and botanicals. Aiming to find more evidences to support the taxonomical revision performed on E. madagascariensis, we carried out phytochemical investigation of two samples of the plant. Fractionation of the ethanol extracts prepared from two stem bark samples of M. madagascariensis (Baker) T.G. Hartley led to the isolation of seven known furoquinoline alkaloids 1-7 and two known methoxyflavones 8 and 9. The presence of furoquinoline alkaloids and methoxyflavones in the title species is in agreement with its taxonomic transfer from Euodia to Melicope. Antiprotozoal evaluation of the isolated compounds showed that 6-methoxy-7-hydroxydictamnine (heliparvifoline, 3) showed weak antimalarial activity (IC50 = 35 µM) against the chloroquine-resistant strain Dd2 of Plasmodium falciparum. Skimmianine (4) displayed moderate cytotoxicity with IC50 value of 1.5 µM against HT-29 colon cancer cell line whereas 3,5-dihydroxy-3',4',7-trimethoxyflavone (9) was weakly active in the same assay (IC50 = 13.9 µM).
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Affiliation(s)
- Vincent E Rasamison
- Centre National d'Application de Recherches Pharmaceutiques, B.P. 702, 101, Antananarivo, Madagascar
| | - Peggy J Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Emilio F Merino
- Department of Biochemistry and the Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Maria B Cassera
- Department of Biochemistry and the Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Michel A Ratsimbason
- Centre National d'Application de Recherches Pharmaceutiques, B.P. 702, 101, Antananarivo, Madagascar
| | - Stephan Rakotonandrasana
- Centre National d'Application de Recherches Pharmaceutiques, B.P. 702, 101, Antananarivo, Madagascar
| | | | - Elie Rafidinarivo
- Institut Supérieur de Technologie, B.P. 8122, 101, Antananarivo, Madagascar
| | - David G I Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Harinantenaina L Rakotondraibe
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH, 43210, USA.
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3
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Eaton AL, Rakotondraibe LH, Brodie PJ, Goetz M, Kingston DGI. Correction to Antiproliferative Trihydroxyalkylcyclohexenones from Pleiogynium timoriense. J Nat Prod 2016; 79:451. [PMID: 26836948 PMCID: PMC5104423 DOI: 10.1021/acs.jnatprod.6b00073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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4
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Su Q, Brodie PJ, Liu Y, Miller JS, Andrianjafy NM, Antsiferana R, Rasamison VE, Kingston DGI. Antiproliferative Triterpenoid Saponins from Leptaulus citroides Baill. from the Madagascar Rain Forest. Nat Prod Bioprospect 2016; 6:31-9. [PMID: 26746216 PMCID: PMC4749521 DOI: 10.1007/s13659-015-0083-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 12/19/2015] [Indexed: 06/05/2023]
Abstract
Bioassay-guided fractionation of EtOH extracts obtained from the roots and wood of the Madagascan plant Leptaulus citroides Baill. (Cardiopteridaceae) led to the isolation of ethyl esters of three new triterpenoid saponins (1-3) and the known sesquiterpenoid cinnamosmolide (4). The structures of 1-3 were elucidated by extensive 1D and 2D NMR experiments and mass spectrometry. Compounds 1, 2, and 4 showed moderate cytotoxicity against the A2780 human ovarian cancer cell line with IC50 values of 2.8, 10.2 and 2.0 µM, respectively.
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Affiliation(s)
- Qingxi Su
- Department of Chemistry, Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Peggy J Brodie
- Department of Chemistry, Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Yixi Liu
- Department of Chemistry, Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA
| | - James S Miller
- Missouri Botanical Garden, P.O. Box 299, St. Louis, MO, 63166-0299, USA
| | | | - Rabodo Antsiferana
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, 101 Antananarivo, Madagascar
| | - Vincent E Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, 101 Antananarivo, Madagascar
| | - David G I Kingston
- Department of Chemistry, Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA.
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5
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Presley CC, Rakotondraibe LH, Brodie PJ, Callmander MW, Randrianaivo R, Rasamison VE, Rakotobe E, Kingston DGI. A Synthetic Butenolide Diterpene is now a Natural Product Isolated from Metaporana sericosepala, a Plant from the Madagascar Dry Forest [1a]. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000904] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Antiproliferative bioassay-guided fractionation of the ethanolic extract of the endemic Madagascan plant Metaporana sericosepala led to the first natural product isolation of a butenolide diterpene, which was synthesized during an anti-inflammatory study in 1988. The structure of the compound was elucidated as 3-homofarnesyl-4-hydroxybutenolide (1) by analysis of its spectroscopic data, including 1D- and 2D-NMR data and chemical evidence. The once synthetic compound can now also be considered as a natural product. Compound 1 had modest antiproliferative activity towards the A2780 ovarian cancer cell line with an IC50 value of 8 μM.
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Affiliation(s)
| | - L. Harinantenaina Rakotondraibe
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061-0212, USA
- College of Pharmacy, Division of Medicinal Chemistry and Pharmacognosy, The Ohio State University, Columbus, OH 43210, USA
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061-0212, USA
| | | | | | - Vincent E. Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061-0212, USA
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6
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Presley CC, Rakotondraibe LH, Brodie PJ, Callmander MW, Randrianaivo R, Rasamison VE, Rakotobe E, Kingston DGI. A Synthetic Butenolide Diterpene is now a Natural Product Isolated from Metaporana sericosepala, a Plant from the Madagascar Dry Forest. Nat Prod Commun 2015; 10:1505-1507. [PMID: 26435765 PMCID: PMC4587655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
Antiproliferative bioassay-guided fractionation of the ethanolic extract of the endemic Madagascan plant Metaporana sericosepala led to the first natural product isolation of a butenolide diterpene, which was synthesized during an anti-inflammatory study in 1988. The structure of the compound was elucidated as 3-homofarnesyl-4-hydroxybutenolide (1) by analysis of its spectroscopic data, including 1D- and 2D-NMR data and chemical evidence. The once synthetic compound can now also be considered as a natural product. Compound 1 had modest antiproliferative activity towards the A2780 ovarian cancer cell line,with an IC50 value of 8 µM.
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Affiliation(s)
| | | | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Tech,
Blacksburg, Virginia 24061-0212, USA
| | | | | | - Vincent E. Rasamison
- Centre National d’Application des Recherches
Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d’Application des Recherches
Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Tech,
Blacksburg, Virginia 24061-0212, USA
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7
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Liu Y, Wiedle CH, Brodie PJ, Callmander MW, Rakotondrajaona R, Rakotobe E, Rasamison VE, Kingston DGI. Antiproliferative Diterpenes from a Malleastrum sp. from the Madagascar dry forest. Nat Prod Commun 2015; 10:1509-1512. [PMID: 26594745 PMCID: PMC4689295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
An ethanol extract of leaves of the plant species Malleastrum sp. collected in northern Madagascar afforded the new clerodane diterpene 18-oxo-cleroda-3,13-dien-16,15-olide (1), together with the three known clerodane diterpenes 16,18-dihydroxykolavenic acid lactone (2), solidagolactone (3) and (-)-kolavenol (4), and the known labdane diterpene 3-oxo-ent-Iabda-8(17),13-dien-15,16-olide (5). Compounds 1, 3, and 4 showed moderate antiproliferative activities against the A2780 ovarian cancer cell line, with the IC50 values of 3.01 ± 0.8, 7.84 ± 0.2, and 17.9 ± 3 µM, respectively. The structure elucidations of all compounds were carried out based on analysis of NMR and mass spectroscopic data. The relative stereochemistry of compound 1 was determined by NOESY NMR spectrum.
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Affiliation(s)
- Yixi Liu
- Department of Chemistry and Virginia Tech Center for Drug Discovery,
M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
| | - C. Houston Wiedle
- Department of Chemistry and Virginia Tech Center for Drug Discovery,
M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry and Virginia Tech Center for Drug Discovery,
M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
| | | | - R. Rakotondrajaona
- Centre National d’Application des Recherches Pharmaceutiques,
B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques,
B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques,
B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry and Virginia Tech Center for Drug Discovery,
M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
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8
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Liu Y, Wiedle CH, Brodie PJ, Callmander MW, Rakotondrajaona R, Rakotobe E, Rasamison VE, Kingston DGI. Antiproliferative Diterpenes from a Malleastrum sp. from the Madagascar dry forest [1]. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An ethanol extract of leaves of the plant species Malleastrum sp. collected in northern Madagascar afforded the new clerodane diterpene 18-oxo-cleroda-3,13-dien-16,15-olide (1), together with the three known clerodane diterpenes 16,18-dihydroxykolavenic acid lactone (2), solidagolactone (3) and (-)-kolavenol (4), and the known labdane diterpene 3-oxo-ent-Iabda-8(17),13-dien-15,16-olide (5). Compounds 1, 3, and 4 showed moderate antiproliferative activities against the A2780 ovarian cancer cell line, with the IC50 values of 3.01 ± 0.8, 7.84 ± 0.2, and 17.9 ± 3 μM, respectively. The structure elucidations of all compounds were carried out based on analysis of NMR and mass spectroscopic data. The relative stereochemistry of compound 1 was determined by NOESY NMR spectrum.
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Affiliation(s)
- Yixi Liu
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
| | - C. Houston Wiedle
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
| | | | - R. Rakotondrajaona
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
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9
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Harinantenaina Rakotondraibe L, Rasolomampianina R, Park HY, Li J, Slebodnik C, Brodie PJ, Blasiak LC, Hill R, TenDyke K, Shen Y, Cassera MB, Rejo F, Kingston DGI. Antiproliferative and antiplasmodial compounds from selected Streptomyces species. Bioorg Med Chem Lett 2015; 25:5646-9. [PMID: 26508548 DOI: 10.1016/j.bmcl.2015.07.103] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 07/27/2015] [Accepted: 07/29/2015] [Indexed: 11/29/2022]
Abstract
In continuation of our ongoing search for bioactive compounds from microbial extracts, we performed antiproliferative and/or antimalarial assays on extracts of 806 microbial species isolated from Madagascan marine organisms, on 1317 species isolated from Madagascan soil samples and on a Streptomyces species (S.4) from a marine sponge collected from the Florida Keys. This work identified active extracts from four Streptomyces isolates (S.1, S.2, S.3 and S.4). The extracts of Streptomyces S.1 and S.2 showed antiproliferative activity against the A2780 ovarian cancer cell line, while those of S.3 and S.4 displayed both antiproliferative and antimalarial activity. Bioassay-guided fractionation coupled with dereplication of the active extracts led to the identification and isolation of nonactin (1), monactin (2), dinactin (3), ±-nonactic acid (4), toyocamycin (5), piperafizine A (6) and a new dipeptide named xestostreptin (7). The structures of all isolated compounds 1-7 were elucidated by analyses of their NMR spectroscopic and mass spectrometric data, and were confirmed by comparison with the data reported in the literature. Compound 6 was crystallized and subjected to X-ray diffraction analysis to confirm its structure as piperafizine A (6). Compounds 1-3 displayed strong antiproliferative activity against A2780 ovarian cancer cells (IC50 values of 0.1, 0.13 and 0.2 μM, respectively), A2058 melanoma cells (IC50 values of 0.2, 0.02 and 0.02 μM, respectively), and H522-T1 non small-cell cancer lung cells (IC50 values of 0.1, 0.01 and 0.01 μM, respectively), while compounds 4 and 7 exhibited weak antiplasmodial activity against the Dd2 strain of Plasmodium falciparum, with IC50 values of 6.5 and 50 μM, respectively.
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Affiliation(s)
- L Harinantenaina Rakotondraibe
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States.
| | - Rado Rasolomampianina
- Centre National de Recherches sur l'environnement, B.P. 1739, Antananarivo 101, Madagascar
| | - Hyun-Young Park
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Jie Li
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Carla Slebodnik
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Peggy J Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Leah C Blasiak
- Center of Marine Biotechnology, University of Maryland Biotechnology Institute, Baltimore, Maryland, MD 21201, United States
| | - Russel Hill
- Center of Marine Biotechnology, University of Maryland Biotechnology Institute, Baltimore, Maryland, MD 21201, United States
| | - Karen TenDyke
- Eisai Inc., 4 Corporate Drive, Andover, MA 01810, United States
| | - Yongchun Shen
- Eisai Inc., 4 Corporate Drive, Andover, MA 01810, United States
| | - Maria B Cassera
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - Felicite Rejo
- Centre National de Recherches sur l'environnement, B.P. 1739, Antananarivo 101, Madagascar
| | - David G I Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
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10
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Liu Y, Young K, Rakotondraibe LH, Brodie PJ, Wiley JD, Cassera M, Callmander MW, Rakotondrajaona R, Rakotobe E, Rasamison VE, TenDyke K, Shen Y, Kingston DGI. Antiproliferative Compounds from Cleistanthus boivinianus from the Madagascar Dry Forest. J Nat Prod 2015; 78:1543-1547. [PMID: 26091020 PMCID: PMC4517784 DOI: 10.1021/np501020m] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Indexed: 06/04/2023]
Abstract
The two new lignans 3α-O-(β-D-glucopyranosyl)desoxypodophyllotoxin (1) and 4-O-(β-D-glucopyranosyl)dehydropodophyllotoxin (2) were isolated from Cleistanthus boivinianus, together with the known lignans deoxypicropodophyllotoxin (3), (±)-β-apopicropodophyllin (4), (-)-desoxypodophyllotoxin (5), (-)-yatein (6), and β-peltatin-5-O-β-D-glucopyranoside (7). The structures of all compounds were characterized by spectroscopic techniques. Compounds 1, 4, and 5 showed potent antiproliferative activities against the A2780 ovarian cancer cell line, with IC50 values of 33.0 ± 3.6, 63.1 ± 6.7, and 230 ± 1 nM, respectively. Compounds 2 and 7 showed only modest A2780 activities, with IC50 values of 2.1 ± 0.3 and 4.9 ± 0.1 μM, respectively, while compounds 3 and 6 had IC50 values of >10 μM. Compound 1 also had potent antiproliferative activity against the HCT-116 human colon carcinoma cell line, with an IC50 value of 20.5 nM, and compound 4 exhibited modest antiproliferative activity against the A2058 human caucasian metastatic melanoma and MES-SA human uterine sarcoma cell lines, with IC50 values of 4.6 and 4.0 μM, respectively.
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Affiliation(s)
- Yixi Liu
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Kelly Young
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - L. Harinantenaina Rakotondraibe
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Peggy J. Brodie
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Jessica D. Wiley
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Maria
B. Cassera
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Martin W. Callmander
- Missouri
Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166, United States
| | - R. Rakotondrajaona
- Centre
National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre
National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre
National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Karen TenDyke
- Eisai Inc., 4 Corporate
Drive, Andover, Massachusetts 01810, United States
| | - Yongchun Shen
- Eisai Inc., 4 Corporate
Drive, Andover, Massachusetts 01810, United States
| | - David G. I. Kingston
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
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11
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Eaton A, Rakotondraibe LH, Brodie PJ, Goetz M, Kingston DGI. Antiproliferative Trihydroxyalkylcyclohexenones from Pleiogynium timoriense. J Nat Prod 2015; 78:1752-5. [PMID: 26132421 PMCID: PMC4517783 DOI: 10.1021/acs.jnatprod.5b00119] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Indexed: 05/26/2023]
Abstract
Investigation of a DCM extract of the bark of Pleiogynium timoriense from the former Merck collection of natural product extracts for antiproliferative activity indicated that it was active with an IC50 value of 1.3 μg/mL against the A2780 ovarian cancer cell line. Bioassay-directed fractionation of this extract yielded the three new bioactive trihydroxyalkylcyclohexenones 1-3. Their structures were determined by a combination of spectroscopic and chemical methods. Compounds 1-3 exhibited submicromolar antiproliferative activity against the A2780 human ovarian cancer cell line, with IC50 values of 0.8, 0.7, and 0.8 μM, respectively.
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Affiliation(s)
- Alexander
L. Eaton
- Department
of Chemistry, Virginia Polytechnic Institute
and State University, Blacksburg, Virginia 24061, United States
| | - L. Harinantenaina Rakotondraibe
- Division
of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States
| | - Peggy J. Brodie
- Department
of Chemistry, Virginia Polytechnic Institute
and State University, Blacksburg, Virginia 24061, United States
| | - Michael Goetz
- Natural
Products Discovery Institute, 3805 Old Easton Road, Doylestown, Pennsylvania 18902, United States
| | - David G. I. Kingston
- Department
of Chemistry, Virginia Polytechnic Institute
and State University, Blacksburg, Virginia 24061, United States
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12
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Liu Y, Rakotondraibe LH, Brodie PJ, Wiley JD, Cassera MB, Miller JS, Ratovoson F, Rakotobe E, Rasamison VE, Kingston DGI. Antimalarial 5,6-Dihydro-α-pyrones from Cryptocarya rigidifolia: Related Bicyclic Tetrahydro-α-Pyrones Are Artifacts1. J Nat Prod 2015; 78:1330-8. [PMID: 26042470 PMCID: PMC4485685 DOI: 10.1021/acs.jnatprod.5b00187] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Indexed: 06/04/2023]
Abstract
Antimalarial bioassay-guided fractionation of an EtOH extract of the root wood of Cryptocarya rigidifolia (Lauraceae) led to the isolation of the five new 5,6-dihydro-α-pyrones cryptorigidifoliols A-E (1-5) and the six bicyclic tetrahydro-α-pyrone derivatives cryptorigidifoliols F-K (6-11). The structure elucidations of all compounds were made on the basis of the interpretation of spectroscopic data and chemical derivatization, and the relative and absolute configurations were determined by NOESY, electronic circular dichroism (ECD), and (1)H NMR analysis of α-methoxyphenylacetyl (MPA) derivatives. The bicyclic tetrahydro-α-pyrone derivatives were identified as products of acid-catalyzed intramolecular Michael addition of the 5,6-dihydro-α-pyrones in the presence of silica gel. A structure-activity relationship study suggested that the presence of an α,β-unsaturated carbonyl moiety is not essential for potent antimalarial activity.
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Affiliation(s)
- Yixi Liu
- Department
of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, M/C 0212, Blacksburg, Virginia 24061, United States
| | - L. Harinantenaina Rakotondraibe
- Department
of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, M/C 0212, Blacksburg, Virginia 24061, United States
| | - Peggy J. Brodie
- Department
of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, M/C 0212, Blacksburg, Virginia 24061, United States
| | - Jessica D. Wiley
- Department
of Biochemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, M/C 0308, Blacksburg, Virginia 24061, United States
| | - Maria B. Cassera
- Department
of Biochemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, M/C 0308, Blacksburg, Virginia 24061, United States
| | - James S. Miller
- Missouri
Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166, United States
| | - F. Ratovoson
- Missouri
Botanical Garden, Lot
VP 31 Ankadibevava, Anjohy Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre
National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre
National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department
of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, M/C 0212, Blacksburg, Virginia 24061, United States
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13
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Liu Y, Cheng E, Rakotondraibe LH, Brodie PJ, Applequist W, Randrianaivo R, Rakotondrafara A, Ratsimbason M, Rasamison VE, Kingston DGI. Antiproliferative Compounds from Ocotea macrocarpa from the Madagascar Dry Forest 1. Tetrahedron Lett 2015; 56:3630-3632. [PMID: 26034338 DOI: 10.1016/j.tetlet.2015.01.172] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bioassay-directed fractionation of an antiproliferative ethanol extract of the roots of Ocotea macrocarpa (Lauraceae) afforded the new butanolide macrocarpolide A (1), and the two new secobutanolides macrocarpolides B (2) and C (3), together with the known butanolides linderanolide B (4) and isolinderanolide (5). The structure elucidation of all compounds was carried out based on NMR and mass spectroscopic data analyses. The absolute configurations of all compounds isolated were determined by comparison of their optical rotation values with those found in literature. Compounds 1-5 showed good antiproliferative activities against the A2780 ovarian cell line, with IC50 values of 2.57 ± 0.12 (1), 1.98 ± 0.23 (2), 1.67 ± 0.05 (3), 2.43 ± 0.41 (4), and 1.65 ± 0.44 µM (5), respectively.
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Affiliation(s)
- Yixi Liu
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061
| | - Emily Cheng
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061
| | | | - Peggy J Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061
| | - Wendy Applequist
- Missouri Botanical Garden, P.O. Box 299, St. Louis Missouri 63166
| | - Richard Randrianaivo
- Missouri Botanical Garden, Lot VP 31 Ankadibevava, Anjohy Antananarivo 101, Madagascar
| | | | - Michel Ratsimbason
- Centre National d'Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Vincent E Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - David G I Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061
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14
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Eaton AL, Brodie PJ, Callmander MW, Rakotondrajaona R, Rakotobe E, Rasamison VE, Kingston DGI. Bioactive Oleanane Glycosides from Polyscias duplicata from the Madagascar Dry Forest [1]. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
As part of the International Cooperative Biodiversity Group (ICBG) program, in a search for antiproliferative compounds, an ethanol extract of Polyscias duplicata was investigated due to its antiproliferative activity against the A2780 human ovarian cell cancer line (IC50 6 μg/mL). Seven known oleanane glycosides, 3β-[(α-L-arabinopyranosyl)oxy]-16α-hydroxyolean-12-en-28-oic acid (1, IC50 8 μM), 3β-[(α-L-arabinopyranosyl)oxy]-16α,23-dihydroxyolean-12-en-18-oic acid (2, IC50 13 μM), 3β-[( O-β-D-glucopyranosyl-(1→3)-α-L-arabinopyranosyl)oxy]–16α-hydroxyolean-12-en-28-oic acid (3, IC50 7 μM), 3β-[( O-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl)oxy]-16α-hydroxyolean-12-en-28-oic acid (4, IC50 2.8 μM), 3β-[( O-β-D-glucopyranosyl-(1→3)-α-L-arabinopyranosyl)oxy]–23-hydroxyolean-12-en-28-oic acid (5, IC50 10 μM), 3β-[( O-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl)oxy]-23-hydroxyolean-12-en-28-oic acid (6, IC50 3.4 μM), and 3β-[(α-L-arabinopyranosyl)oxy]-23-hydroxyolean-12-en-28-oic acid (7, IC50 3.4 μM) were isolated, and their structures determined using spectroscopic methods.
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Affiliation(s)
- Alexander L. Eaton
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | | | - Roland Rakotondrajaona
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
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15
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Eaton AL, Brodie PJ, Callmander MW, Rakotondrajaona R, Rakotobe E, Rasamison VE, Kingston DGI. Bioactive oleanane glycosides from Polyscias duplicata from the Madagascar dry forest. Nat Prod Commun 2015; 10:567-570. [PMID: 25960824 PMCID: PMC4423820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
As part of the International Cooperative Biodiversity Group (ICBG) program, in a search for antiproliferative compounds, an ethanol extract of Polyscias duplicata was investigated due to its antiproliferative activity against the A2780 human ovarian cell cancer line (IC50 6 µg/mL). Seven known oleanane glycosides, 3β-[(α-L-arabinopyranosyl)oxy]-16α-hydroxyolean-12-en-28-oic acid (1, IC50 8 µM), 3β-[(α-L-arabinopyranosyl)oxy]-16α,23-dihydroxyolean-12-en-18-oic acid (2, IC50 13 µM), 3β-[(O-β-D-glucopyranosyl-(t-->3)-α-L-arabinopyranosyl)oxy]-16α-hydroxyolean-12-en-28-oic acid (3, IC50 7 µM), 3β-[(O-α-L-rhamnopyranosyl-(1-2)-α-L-arabinopyranosyl)oxy]-16α-hydroxyolean-12-en-28-oic acid (4, IC50 2.8 µM), 3β-[(O-β-D-glucopyranosyl-(l-->3)-α-L- arabinopyranosyl)oxy]-23-hydroxyolean-12-en-28-oic acid (5, IC50 10 µM), β-[(O-α-L-rhamnopyranosyl-(-1.2)-α-L-arabinopyranosyl)oxy]-23-hydroxyolean-12-en-28-oic acid (6, IC50 3.4 µM), and 3β-[(α-L-arabinopyranosyl)oxy]-23-hydroxyolean-12-en-28-oic acid (7, IC50 3.4 µM) were isolated, and their structures determined using spectroscopic methods.
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Affiliation(s)
- Alexander L. Eaton
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | | | - Roland Rakotondrajaona
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
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16
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Rakotondraibe LH, Graupner PR, Xiong Q, Olson M, Wiley JD, Krai P, Brodie PJ, Callmander MW, Rakotobe E, Ratovoson F, Rasamison VE, Cassera MB, Hahn DR, Kingston DGI, Fotso S. Neolignans and other metabolites from Ocotea cymosa from the Madagascar rain forest and their biological activities. J Nat Prod 2015; 78:431-40. [PMID: 25650896 PMCID: PMC4410025 DOI: 10.1021/np5008153] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Ten new neolignans including the 6'-oxo-8.1'-lignans cymosalignans A (1a), B (2), and C (3), an 8.O.6'-neolignan (4a), ococymosin (5a), didymochlaenone C (6a), and the bicyclo[3.2.1]octanoids 7-10 were isolated along with the known compounds 3,4,5,3',5'-pentamethoxy-1'-allyl-8.O.4'-neolignan, 3,4,5,3'-tetramethoxy-1'-allyl-8.O.4'-neolignan, didymochlaenone B, virologin B, ocobullenone, and the unusual 2'-oxo-8.1'-lignan sibyllenone from the stems or bark of the Madagascan plant Ocotea cymosa. The new 8.O.6'-neolignan 4a, dihydrobenzofuranoid 5a, and the bicyclo[3.2.1]octanoid 7a had in vitro activity against Aedes aegypti, while the new compounds 5a, 7a, 8, and 10a and the known virolongin B (4b) and ocobullenone (10b) had antiplasmodial activity. We report herein the structure elucidation of the new compounds on the basis of spectroscopic evidence, including 1D and 2D NMR spectra, electronic circular dichroism, and mass spectrometry, and the biological activities of the new and known compounds.
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Affiliation(s)
- L. Harinantenaina Rakotondraibe
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Paul R. Graupner
- Discovery Research, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, IN 46268, USA
| | - Quanbo Xiong
- Discovery Research, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, IN 46268, USA
| | - Monica Olson
- Discovery Research, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, IN 46268, USA
| | - Jessica D. Wiley
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - Priscilla Krai
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - Peggy J. Brodie
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | | | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Fidy Ratovoson
- Missouri Botanical Garden, B.P 3391, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Maria B. Cassera
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - Donald R. Hahn
- Discovery Research, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, IN 46268, USA
| | - David G. I. Kingston
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Serge Fotso
- Discovery Research, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, IN 46268, USA
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17
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Liu Y, Rakotondraibe LH, Brodie PJ, Wiley JD, Cassera MB, Goetz M, Kingston DGI. Antiproliferative and antimalarial sesquiterpene lactones from Piptocoma antillana from Puerto Rico. Nat Prod Commun 2014; 9:1403-1406. [PMID: 25522525 PMCID: PMC4311553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
Bioassay-directed fractionation of an antiproliferative ethanol extract of the leaves and twigs of Piptocoma antillana (Asteraceae) afforded two new goyazensolide-type sesquiterpene lactones named 5-O-methyl-5-epiisogoyazensolide (1) and 15-O-methylgoyazensolide (2), together with the known compounds 1-oxo-3,10-epoxy-8-(2-methylacr1 0-epoxy-8-(2-methylacryloxy)-l 5-acetoxygermacra-2,4, 11(1 3)-trien-6(12)-olide (3) and 5-epiisogoyazensolide (4). The structure elucidation of all compounds was carried out based on NMR and mass spectroscopic data analyses. The relative and absolute configurations of all the isolated compounds were determined from their CD and NOESY NMR spectra. Compounds 1-4 showed moderately potent antiproliferative activities against A2780 ovarian cancer cells, with IC50 values of 1.5 +0.5, 0.6 ± 0.3, 1.62 ± 0.05, and 1.56 ± 0.04 μM, respectively. They also displayed antimalarial activity against Plasmodiumfalciparum, with IC50 values of 6.2 05 22 ± 0.5, 2.2± 0.5, 8.0 ± 0.4, and 9.0 ± 0.6 μM, respectively.
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Affiliation(s)
- Yixi Liu
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - L. Harinantenaina Rakotondraibe
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Peggy J. Brodie
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Jessica D. Wiley
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061,United States
| | - Maria B. Cassera
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061,United States
| | - Michael Goetz
- Natural Products Discovery Institute, 3805 Old Easton Road, Doylestown, PA 18902, United States
| | - David G. I. Kingston
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
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18
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Liu Y, Rakotondraibe LH, Brodie PJ, Wiley JD, Cassera MB, Goetz M, Kingston DGI. Antiproliferative and Antimalarial Sesquiterpene Lactones from Piptocoma antillana from Puerto Rico [1]. Nat Prod Commun 2014. [DOI: 10.1177/1934578x1400901002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Bioassay-directed fractionation of an antiproliferative ethanol extract of the leaves and twigs of Piptocoma antillana (Asteraceae) afforded two new goyazensolide-type sesquiterpene lactones named 5- O-methyl-5-epiisogoyazensolide (1) and 15- O-methylgoyazensolide (2), together with the known compounds 1-oxo-3,10-epoxy-8-(2-methylacryloxy)-15-acetoxygermacra-2,4,11(13)-trien-6(12)-olide (3) and 5-epiisogoyazensolide (4). The structure elucidation of all compounds was carried out based on NMR and mass spectroscopic data analyses. The relative and absolute configurations of all the isolated compounds were determined from their CD and NOESY NMR spectra. Compounds 1–4 showed moderately potent antiproliferative activities against A2780 ovarian cancer cells, with IC50 values of 1.5 ±0.5, 0.6 ± 0.3, 1.62 ± 0.05, and 1.56 ± 0.04 μM, respectively. They also displayed antimalarial activity against Plasmodium falciparum, with IC50 values of 6.2 ± 0.5, 2.2 ± 0.5, 8.0 ± 0.4, and 9.0 ± 0.6 μM, respectively.
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Affiliation(s)
- Yixi Liu
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - L. Harinantenaina Rakotondraibe
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
- College of Pharmacy, Division of Medicinal Chemistry and Pharmacognosy, The Ohio State University, Columbus, OH 43210, United States
| | - Peggy J. Brodie
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Jessica D. Wiley
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - Maria B. Cassera
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - Michael Goetz
- Natural Products Discovery Institute, 3805 Old Easton Road, Doylestown, PA 18902, United States
| | - David G. I. Kingston
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
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19
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Rasamison VE, Rakotondraibe LH, Slebodnick C, Brodie PJ, Ratsimbason M, TenDyke K, Shen Y, Randrianjanaka LM, Kingston DGI. Nitrogen-containing dimeric nor-multiflorane triterpene from a Turraea sp. Org Lett 2014; 16:2626-9. [PMID: 24773558 PMCID: PMC4027945 DOI: 10.1021/ol500775r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The new triterpene turranoic acid
(1) and the new
N-containing nor-triterpene turraenine (2), along with triptocallic acid B (3) and esculentoic
acid (4) were isolated from leaves of a Turraea sp. Compounds 1–3 showed weak to
moderate in vitro antiplasmodial activity against the chloroquine-resistant Plasmodium falciparum strain FCM29. Compound 1 also displayed weak cytotoxic activity against the nonsmall lung
cancer cell line H522-T1 with an IC50 value of 16.4 μM.
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Affiliation(s)
- Vincent E Rasamison
- Centre National d'Application des Recherches Pharmaceutiques B.P , 702, Antananarivo 101, Madagascar
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20
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Dai Y, Harinantenaina L, Bowman JD, Da Fonseca IO, Brodie PJ, Goetz M, Cassera MB, Kingston DGI. Isolation of antiplasmodial anthraquinones from Kniphofia ensifolia, and synthesis and structure-activity relationships of related compounds. Bioorg Med Chem 2014; 22:269-76. [PMID: 24326280 PMCID: PMC3919637 DOI: 10.1016/j.bmc.2013.11.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 11/07/2013] [Accepted: 11/15/2013] [Indexed: 02/04/2023]
Abstract
Bioassay-guided separation of the South African plant Kniphofia ensifolia for antiplasmodial activity led to the isolation of two new anthraquinones, named kniphofiones A and B (3 and 4), together with three known bioactive anthraquinone monomers (1, 2 and 5), and four known bisanthraquinones (6-9). The structures of the two new compounds were elucidated based on analyses of their 1D and 2D NMR spectra and mass spectrometric data. The dimeric compounds 6 and 7 displayed the strongest antiplasmodial activity among all the isolated compounds, with IC₅₀ values of 0.4 ± 0.1 and 0.2 ± 0.1 μM, respectively. The two new compounds displayed modest activities, with IC₅₀ values of 26 ± 4 and 9 ± 1 μM, respectively. Due to the synthetic accessibility of the new compounds and the increased activity shown by the dimeric compounds, a structure-activity relationship study was conducted. As a result, one analogue of kniphofione B (4), the caffeic acid derivative of aloe-emodin, was found to have the highest activity among all the aloe-emodin derivatives, with an IC50 value of 1.3 ± 0.2 μM.
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Affiliation(s)
- Yumin Dai
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Liva Harinantenaina
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Jessica D Bowman
- Department of Biochemistry and the Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - Isabel Osorio Da Fonseca
- Department of Biochemistry and the Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - Peggy J Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Michael Goetz
- Natural Products Discovery Institute, 3805 Old Easton Road, Doylestown, PA 18902, United States
| | - Maria B Cassera
- Department of Biochemistry and the Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - David G I Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States.
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21
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Liu Y, Harinantenaina L, Brodie PJ, Bowman JD, Cassera MB, Slebodnick C, Callmander MW, Randrianaivo R, Rakotobe E, Rasamison VE, Applequist W, Birkinshaw C, Lewis GP, Kingston DGI. Bioactive compounds from Stuhlmannia moavi from the Madagascar dry forest. Bioorg Med Chem 2013; 21:7591-4. [PMID: 24239390 PMCID: PMC3907118 DOI: 10.1016/j.bmc.2013.10.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/16/2013] [Accepted: 10/24/2013] [Indexed: 11/28/2022]
Abstract
Bioassay-directed fractionation of the leaf and root extracts of the antiproliferative Madagascar plant Stuhlmannia moavi afforded 6-acetyl-5,8-dihydroxy-2-methoxy-7-methyl-1,4-naphthoquinone (stuhlmoavin, 1) as the most active compound, with an IC50 value of 8.1 μM against the A2780 human ovarian cancer cell line, as well as the known homoisoflavonoid bonducellin (2) and the stilbenoids 3,4,5'-trihydroxy-3'-methoxy-trans-stilbene (3), piceatannol (4), resveratrol (5), rhapontigenin (6), and isorhapontigenin (7). The structure elucidation of all compounds was based on NMR and mass spectroscopic data, and the structure of 1 was confirmed by a single crystal X-ray analysis. Compounds 2-5 showed weak A2780 activities, with IC50 values of 10.6, 54.0, 41.0, and 74.0 μM, respectively. Compounds 1-3 also showed weak antimalarial activity against Plasmodium falciparum with IC50 values of 23, 26, and 27 μM, respectively.
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Affiliation(s)
- Yixi Liu
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Liva Harinantenaina
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Jessica D. Bowman
- Department of Biochemistry and the Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Maria B. Cassera
- Department of Biochemistry and the Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Carla Slebodnick
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061, USA
| | | | | | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Wendy Applequist
- Missouri Botanical Garden, 4500 Shaw Blvd., St. Louis, Missouri 63110, USA
| | - Chris Birkinshaw
- Missouri Botanical Garden, B.P 3391, Antananarivo 101, Madagascar
| | - Gwilym P. Lewis
- Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, U.K
| | - David G. I. Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061, USA
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22
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Ganesh T, Brodie PJ, Banerjee A, Bane S, Kingston DGI. Synthesis of isotopically labeled epothilones. J Labelled Comp Radiopharm 2013; 57:78-81. [PMID: 24307484 DOI: 10.1002/jlcr.3144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 10/14/2013] [Accepted: 10/24/2013] [Indexed: 11/08/2022]
Abstract
The epothilones, including epothilones B and D, are macrocyclic lactones, which have potent cytotoxicities and promote the polymerization of tubulin to mictotubules by binding to and stabilizing the tubulin polymer. They have a very similar mechanism of action to paclitaxel (Taxol®). The determination of the microtubule-binding conformation of the epothilones is an important piece of information in designing improved analogs for possible clinical use, and internuclear distance information that will assist the determination of this conformation can be obtained by rotational echo double resonance (REDOR) NMR studies of microtubule-bound epothilones with appropriate stable isotope labels. Analogs of epothilone B and epothilone D with [(2) H3 ] and [(19) F] labels were prepared from an advanced precursor for potential use in REDOR NMR studies to determine internuclear distances in tubulin-bound ligand.
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Affiliation(s)
- Thota Ganesh
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA
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23
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Eaton AL, Harinantenaina L, Brodie PJ, Cassera MB, Bowman JD, Callmander MW, Randrianaivo R, Rakotondrajaona R, Rakotobe E, Rasamison VE, Kingston DGI. A New Bioactive Diterpene Glycoside from Molinaea Retusa from the Madagascar Dry Forest. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300800903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In a continuing collaboration in a search for new antiproliferative compounds in Madagascar as part of an International Cooperative Biodiversity Group (ICBG), an ethanol extract of Molinaea retusa Radlk. (Sapindaceae) was investigated on the basis of its moderate antiproliferative activity against the A2780 human ovarian cancer cell line (IC50 16 μg/mL). One new compound, 2″,3″,4″,6′-de- O-acetylcupacinoside (1, IC50 15.4 μM) and two known compounds, cupacinoside (2, IC50 9.5 μM) and 6-de- O-acetylcupacinoside (3, IC50 10.9 μM), were isolated by bioassay-directed fractionation using liquid-liquid partitioning, column chromatography, and HPLC. Compounds 2 and 3 also had moderate antiplasmodial activities, with IC50 values of 4.0 and 6.4 μM, respectively, against Plasmodium falciparum, Dd2 strain. The structures were determined using spectroscopic methods.
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Affiliation(s)
- Alexander L. Eaton
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Liva Harinantenaina
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Maria B. Cassera
- Department of Biochemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Jessica D. Bowman
- Department of Biochemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | | | | | - Roland Rakotondrajaona
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
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24
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Liu Y, Harinantenaina L, Brodie PJ, Slebodnick C, Callmander MW, Rakotondrajaona R, Rakotobe E, Rasamison VE, TenDyke K, Shen Y, Kingston DGI. Structure elucidation of antiproliferative bisbenzylisoquinoline alkaloids from Anisocycla grandidieri from the Madagascar dry forest. Magn Reson Chem 2013; 51:574-9. [PMID: 23754698 PMCID: PMC3747959 DOI: 10.1002/mrc.3976] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 05/14/2013] [Accepted: 05/15/2013] [Indexed: 06/02/2023]
Abstract
Antiproliferative bioassay-guided fractionation of the ethanol extract of the stems of Anisocycla grandidieri led to the isolation of the known alkaloids stebisimine (1), (+)-1,2-dehydrotelobine (2), (+)-2'-norcocsuline (3) and puetogaline B (4). Herein, we report the full NMR assignments of all compounds and the X-ray crystallography of single crystals of compounds 1 and 3. Compounds 2 and 3 showed moderate antiproliferative activity against the A2780 human ovarian cancer cell line with IC50 values of 4.1 ± 0.3 and 2.7 ± 0.3 μM, respectively, and they also displayed selective activity toward the H460 (large cell lung cancer), MCF-7 (breast ductal carcinoma), and UACC-257 (melanoma) cell lines.
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Affiliation(s)
- Yixi Liu
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Liva Harinantenaina
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Carla Slebodnick
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | | | | | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
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25
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Eaton AL, Harinantenaina L, Brodie PJ, Cassera MB, Bowman JD, Callmander MW, Randrianaivo R, Rakotondrajaona R, Rakotobe E, Rasamison VE, Kingston DGI. A new bioactive diterpene glycoside from Molinaea retusa from the Madagascar dry forest. Nat Prod Commun 2013; 8:1201-1203. [PMID: 24273845 PMCID: PMC3904959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
In a continuing collaboration in a search for new antiproliferative compounds in Madagascar as part of an International Cooperative Biodiversity Group (ICBG), an ethanol extract of Molinaea retusa Radlk. (Sapindaceae) was investigated on the basis of its moderate antiproliferative activity against the A2780 human ovarian cancer cell line (IC50 16 microg/mL). One new compound, 2", 3", 4", 6'-de-O-acetylcupacinoside (1, IC50 15.4 microM) and two known compounds, cupacinoside (2, IC50 9.5 microM) and 6-de-O-acetylcupacinoside (3, IC50 10.9 microM), were isolated by bioassay-directed fractionation using liquid-liquid partitioning, column chromatography, and HPLC. Compounds 2 and 3 also had moderate antiplasmodial activities, with IC50 values of 4.0 and 6.4 microM, respectively, against Plasmodium falciparum, Dd2 strain. The structures were determined using spectroscopic methods.
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Affiliation(s)
- Alexander L Eaton
- Department of Chemistry, Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
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26
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Dai Y, Harinantenaina L, Brodie PJ, Goetz M, Shen YY, TenDyke K, Kingston DGI. Antiproliferative Homoisoflavonoids and Bufatrienolides from Urginea depressa. J Nat Prod 2013; 76:865-72. [PMID: 23659371 PMCID: PMC3736822 DOI: 10.1021/np300900a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Investigation of the South African plant Urginea depressa Baker (Asparagaceae Juss.) for antiproliferative activity against the A2780 ovarian cancer cell line led to the isolation of the six new homoisoflavonoids urgineanins A-F (1-6), the two known bufatrienolides 7 and 9, and the new bufatrienolides urginins B and C (8 and 10). Structures were elucidated based on analysis of their 1D and 2D NMR spectra, electronic circular dichroism, and mass spectrometric data. Five of the six new homoisoflavonoids had good antiproliferative activity against the A2780 ovarian cancer, A2058 melanoma, and H522-T1 human non-small-cell lung cancer cells, and urgineanin A (1) had submicromolar activity against all three cell lines. The four bufatrienolides 7-10 had strong antiproliferative activity against the same cell line, with IC50 values of 24.1, 11.2, 111, and 40.6 nM, respectively.
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Affiliation(s)
- Yumin Dai
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Liva Harinantenaina
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Peggy J. Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Michael Goetz
- Natural Products Discovery Institute, 3805 Old Easton Road, Doylestown, PA 18902
| | | | - Karen TenDyke
- Eisai Inc., 4 Corporate Drive, Andover, Massachusetts 01810, USA
| | - David G. I. Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
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27
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Harinantenaina L, Brodie PJ, Maharavo J, Bakary G, TenDyke K, Shen Y, Kingston DGI. Antiproliferative homoscalarane sesterterpenes from two Madagascan sponges. Bioorg Med Chem 2013; 21:2912-7. [PMID: 23623678 DOI: 10.1016/j.bmc.2013.03.078] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 03/20/2013] [Accepted: 03/26/2013] [Indexed: 12/01/2022]
Abstract
Dereplication of the antiproliferative ethyl acetate fraction of the Madagascan sponge Carteriospongia sp. led to the detection and isolation of the two known homoscalarane-type sesterterpenes 1 and 2. Investigation of a similar sponge containing closely related compounds afforded the four new antiproliferative homoscalarane sesterterpenes (3 and 5-7). The structures of all isolated compounds were elucidated by spectroscopic methods, including UV, IR and 1D and 2D NMR. Compounds 1, 3 and 5 displayed submicromolar antiproliferative activity against the A2780 ovarian cell line with IC50 values of 0.65, 0.26 and 0.28 μM, respectively, while compounds 6 and 7 showed moderate activity (4.5 and 8.7 μM, respectively). Compounds 3 and 5 also displayed anti-proliferative activity against the H522-T1 non-small cell lung and A2058 human melanoma cancer cell lines.
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Affiliation(s)
- Liva Harinantenaina
- Department of Chemistry, The Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
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28
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Harinantenaina L, Bowman JD, Brodie PJ, Slebodnick C, Callmander MW, Rakotobe E, Randrianaivo R, Rasamison VE, Gorka A, Roepe PD, Cassera MB, Kingston DGI. Antiproliferative and antiplasmodial dimeric phloroglucinols from Mallotus oppositifolius from the Madagascar Dry Forest (1). J Nat Prod 2013; 76:388-93. [PMID: 23286240 PMCID: PMC3606680 DOI: 10.1021/np300750q] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Bioassay-guided fractionation of an ethanol extract of the leaves and inflorescence of Mallotus oppositifolius collected in Madagascar led to the isolation of the two new bioactive dimeric phloroglucinols mallotojaponins B (1) and C (2), together with the known mallotophenone (3). The structures of the new compounds were determined on the basis of spectroscopic evidence, including their 1D- and 2D-NMR spectra, mass spectrometry, and an X-ray crystal structure. Compounds 1 and 2 showed potent antimalarial activity against chloroquine-resistant Plasmodium falciparum, with IC50 values of 0.75 ± 0.30 and 0.14 ± 0.04 μM, while 3 was inactive in this assay. Compounds 1-3 also displayed strong antiproliferative activity against the A2780 human ovarian cancer cell line (IC50 1.10 ± 0.05, 1.3 ± 0.1 and 6.3 ± 0.4 μM, respectively).
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Affiliation(s)
- Liva Harinantenaina
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Jessica D. Bowman
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - Peggy J. Brodie
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Carla Slebodnick
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | | | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | | | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Alexander Gorka
- Department of Chemistry and Lombardi Cancer Center, Georgetown University, 37th and O Streets NW, Washington, DC 20057, United States
| | - Paul D. Roepe
- Department of Chemistry and Lombardi Cancer Center, Georgetown University, 37th and O Streets NW, Washington, DC 20057, United States
| | - Maria B. Cassera
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA 24061, United States
| | - David G. I. Kingston
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
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29
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Dai Y, Harinantenaina L, Brodie PJ, Birkinshaw C, Randrianaivo R, Applequist W, Ratsimbason M, Rasamison VE, Shen Y, TenDyke K, Kingston DGI. Two antiproliferative triterpene saponins from Nematostylis anthophylla from the highlands of Central Madagascar. Chem Biodivers 2013; 10:233-40. [PMID: 23418170 PMCID: PMC3928794 DOI: 10.1002/cbdv.201200156] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Indexed: 11/07/2022]
Abstract
Investigation of the endemic Madagascan plant Nematostylis anthophylla (Rubiaceae) for antiproliferative activity against the A2780 ovarian cancer cell line led to the isolation of the known triterpene saponin randianin (1), and the two new bioactive triterpene saponins 2"-O-acetylrandianin (2) and 6"-O-acetylrandianin (3). The structures of the two new compounds were elucidated based on analysis of their 1D- and 2D-NMR spectra, and mass spectrometric data. The three isolated triterpene saponins displayed moderate but selective antiproliferative activities, with IC(50) values of 1.2, 1.7, and 2.2 μM, respectively, against the A2780 ovarian cancer, but only weak inhibitions of the proliferation of A2058 melanoma and the H522 lung cancer cell lines.
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Affiliation(s)
- Yumin Dai
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
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30
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Dai Y, Harinantenaina L, Brodie PJ, Callmander MW, Randrianasolo S, Rakotobe E, Rasamison VE, Kingston DGI. Isolation and synthesis of two antiproliferative calamenene-type sesquiterpenoids from Sterculia tavia from the Madagascar rain forest. Bioorg Med Chem 2012; 20:6940-4. [PMID: 23149304 PMCID: PMC3508347 DOI: 10.1016/j.bmc.2012.10.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 10/08/2012] [Accepted: 10/15/2012] [Indexed: 11/28/2022]
Abstract
Investigation of the endemic Madagascan plant Sterculia taiva Baill. (Malvaceae) for antiproliferative activity against the A2780 ovarian cancer cell line led to the isolation of two new bioactive calamenene-type sesquiterpenoids, named tavinin A (2) and epi-tavinin A (3) together with the known sesquiterpenoid mansonone G (1). The structures of the two new compounds were elucidated based on analysis of their 1D and 2D NMR spectra and mass spectrometric data, and were confirmed by de novo synthesis. The three isolated sesquiterpenoids (1-3) had modest antiproliferative activities against the A2780 ovarian cancer cell line, with IC(50) values of 10.2, 5.5 and 6.7 μM, respectively.
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Affiliation(s)
- Yumin Dai
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Liva Harinantenaina
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Peggy J. Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | | | | | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
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31
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Harinantenaina L, Brodie PJ, Callmander MW, Razafitsalama LJ, Rasamison VE, Rakotobe E, Kingston DGI. Two antiproliferative saponins of Tarenna grevei from the Madagascar dry forest [1]. Nat Prod Commun 2012; 7:705-708. [PMID: 22816288 PMCID: PMC3480188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
Antiproliferative bioassay-guided fractionation of the ethanol extract of the endemic Malagasy Rubiaceous plant Tarenna grevei led to the isolation of two new antiproliferative oxygenated oleanane triterpene saponins. The structures of the two active compounds were elucidated as 23-hydroxylongispinogenin 3-O-beta-D-glucopyranoside (1) and longispinogenin 3-O-beta-D-glucopyranosyl (1 --> 2)-beta-D-glucopyranoside (3) by analyses of their spectral data including 1D- and 2D-NMR spectroscopy and chemical evidence. Compounds 1 and 3 displayed moderate antiproliferative activity against the A2780 ovarian cancer cell line with IC50 values of 7.6 and 4 microM, respectively.
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Affiliation(s)
- Liva Harinantenaina
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061-0212, USA
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061-0212, USA
| | | | | | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061-0212, USA
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32
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Harinantenaina L, Brodie PJ, Callmander MW, Razafitsalama LJ, Rasamison VE, Rakotobe E, Kingston DGI. Two Antiproliferative Saponins of Tarenna grevei from the Madagascar Dry Forest [1]. Nat Prod Commun 2012. [DOI: 10.1177/1934578x1200700604] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Antiproliferative bioassay-guided fractionation of the ethanol extract of the endemic Malagasy Rubiaceous plant Tarenna grevei led to the isolation of two new antiproliferative oxygenated oleanane triterpene saponins. The structures of the two active compounds were elucidated as 23-hydroxylongispinogenin 3- O-β-D-glucopyranoside (1) and longispinogenin 3- O-β-D-glucopyranosyl (1→2)-β-D-glucopyranoside (3) by analyses of their spectral data including 1D- and 2D-NMR spectroscopy and chemical evidence. Compounds 1 and 3 displayed moderate antiproliferative activity against the A2780 ovarian cancer cell line with IC50 values of 7.6 and 4 μM, respectively.
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Affiliation(s)
- Liva Harinantenaina
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061-0212, USA
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061-0212, USA
| | | | | | - Vincent E. Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061-0212, USA
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33
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Dai Y, Harinantenaina L, Brodie PJ, Callmander MW, Randrianaivo R, Rakotonandrasana S, Rakotobe E, Rasamison VE, Shen Y, TenDyke K, Suh EM, Kingston DGI. Antiproliferative acetogenins from a Uvaria sp. from the Madagascar dry forest. J Nat Prod 2012; 75:479-83. [PMID: 22136523 PMCID: PMC3243105 DOI: 10.1021/np200697j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Investigation of the endemic Madagascan plant Uvaria sp. for antiproliferative activity against the A2780 ovarian cancer cell line led to the isolation of two new acetogenins. The structures of these two compounds were elucidated on the basis of analysis of their 1D and 2D NMR spectra, circular dichroism, and mass spectrometric data, together with chemical modification. The two acetogenins display weak antiproliferative activity against the A2780 ovarian cancer, the A2058 melanoma, and the H522 lung cancer cell lines.
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Affiliation(s)
- Yumin Dai
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Liva Harinantenaina
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
| | | | | | - Stephan Rakotonandrasana
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Yongchun Shen
- Next Generation Systems, Eisai Inc., 4 Corporate Drive, Andover, Massachusetts 01810
| | - Karen TenDyke
- Next Generation Systems, Eisai Inc., 4 Corporate Drive, Andover, Massachusetts 01810
| | - Edward M. Suh
- Next Generation Systems, Eisai Inc., 4 Corporate Drive, Andover, Massachusetts 01810
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, VA 24061, United States
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Zhan W, Jiang Y, Banerjee A, Brodie PJ, Bane S, Kingston DGI, Liotta DC, Snyder JP. C6-C8 bridged epothilones: consequences of installing a conformational lock at the edge of the macrocycle. Chemistry 2011; 17:14792-804. [PMID: 22127984 PMCID: PMC3248799 DOI: 10.1002/chem.201102630] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Indexed: 11/08/2022]
Abstract
A series of conformationally restrained epothilone analogues with a short bridge between the methyl groups at C6 and C8 was designed to mimic the binding pose assigned to our recently reported EpoA-microtubule binding model. A versatile synthetic route to these bridged epothilone analogues has been successfully devised and implemented. Biological evaluation of the compounds against A2780 human ovarian cancer and PC3 prostate cancer cell lines suggested that the introduction of a bridge between C6-C8 reduced potency by 25-1000 fold in comparison with natural epothilone D. Tubulin assembly measurements indicate these bridged epothilone analogues to be mildly active, but without significant microtubule stabilization capacity. Molecular mechanics and DFT energy evaluations suggest the mild activity of the bridged epo-analogues may be due to internal conformational strain.
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Affiliation(s)
- Weiqiang Zhan
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta GA 30322 (USA), Fax: (+1) 404-712-8670
| | - Yi Jiang
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta GA 30322 (USA), Fax: (+1) 404-712-8670
| | - Abhijit Banerjee
- Department of Chemistry, State University of New York, Binghamton, NY 13902-6016 (USA)
| | - Peggy J. Brodie
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (USA)
| | - Susan Bane
- Department of Chemistry, State University of New York, Binghamton, NY 13902-6016 (USA)
| | - David G. I. Kingston
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (USA)
| | - Dennis C. Liotta
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta GA 30322 (USA), Fax: (+1) 404-712-8670
| | - James P. Snyder
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta GA 30322 (USA), Fax: (+1) 404-712-8670
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Pan E, Gorka AP, Alumasa JN, Slebodnick C, Harinantenaina L, Brodie PJ, Roepe PD, Randrianaivo R, Birkinshaw C, Kingston DGI. Antiplasmodial and antiproliferative pseudoguaianolides of Athroisma proteiforme from the Madagascar Dry Forest. J Nat Prod 2011; 74:2174-80. [PMID: 21995542 PMCID: PMC3203994 DOI: 10.1021/np200499d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Investigation of extracts from the plant Athroisma proteiforme (Humbert) Mattf. (Asteraceae) for antimalarial activity led to the isolation of the five new sesquiterpene lactones 1-5 together with centaureidin (6). The structures of the new compounds were deduced from analyses of physical and spectroscopic data, and the absolute configuration of compound 1 was confirmed by an X-ray crystallographic study. Athrolides C (3) and D (4) both showed antiplasmodial activities with IC50 values of 6.6 (3) and 7.2 μM (4) against the HB3 strain and 5.5 (3) and 4.2 μM (4) against the Dd2 strain of the malarial parasite Plasmodium falciparum. The isolates 1-6 also showed antiproliferative activity against A2780 human ovarian cancer cells, with IC50 values ranging from 0.4 to 2.5 μM.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - David G. I. Kingston
- To whom correspondence should be addressed. Tel: (540) 231-6570. Fax: (540) 231-3255.
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Harinantenaina L, Brodie PJ, Callmander MW, Randrianaivo R, Rakotonandrasana S, Rasamison VE, Rakotobe E, Kingston DGI. Astrotricoumarin, an antiproliferative 4′-hydroxy-2′,3′-dihydroprenylated methylcoumarin from an Astrotrichilia sp. from the Madagascar dry forest[1]. Nat Prod Commun 2011. [DOI: 10.1177/1934578x1100600913] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Bioassay guided fractionation of the ethanol extract of a new endemic species of the genus Astrotrichilia led to the isolation of the new antiproliferative 3-(4′-hydroxy-2′,3′-dihydroprenyl)-4,6-dimethoxy-5-methylcoumarin, named astrotricoumarin (8) with an IC50 value of 6.8 μM against the A2780 cell line. The structure of compound 8 was elucidated on the basis of its physical and spectroscopic data, including extensive 1D- and 2D-NMR analysis.
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Affiliation(s)
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, VA 24061, USA
| | | | | | - Stephan Rakotonandrasana
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
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Harinantenaina L, Brodie PJ, Callmander MW, Randrianaivo R, Rakotonandrasana S, Rasamison VE, Rakotobe E, Kingston DGI. Astrotricoumarin, an antiproliferative 4'-hydroxy-2',3'-dihydroprenylated methylcoumarin from an Astrotrichilia sp. from the Madagascar dry forest. Nat Prod Commun 2011; 6:1259-1262. [PMID: 21941893 PMCID: PMC3183991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
Bioassay guided fractionation of the ethanol extract of a new endemic species of the genus Astrotrichilia led to the isolation of the new antiproliferative 3-(4'-hydroxy-2',3'-dihydroprenyl)-4,6-dimethoxy-5-methylcoumarin, named astrotricoumarin (8) with an IC50 value of 6.8 microM against the A2780 cell line. The structure of compound 8 was elucidated on the basis of its physical and spectroscopic data, including extensive 1D- and 2D-NMR analysis.
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Affiliation(s)
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Tech, Blacksburg, VA 24061
| | | | | | - Stephan Rakotonandrasana
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
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Pan E, Cao S, Brodie PJ, Callmander M, Randrianaivo R, Rakotonandrasana S, Rakotobe E, Rasamison VE, TenDyke K, Shen Y, Suh EM, Kingston DGI. Isolation and synthesis of antiproliferative eupolauridine alkaloids of Ambavia gerrardii from the Madagascar Dry Forest. J Nat Prod 2011; 74:1169-1174. [PMID: 21504145 PMCID: PMC3103620 DOI: 10.1021/np200093n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Investigation of the Madagascan endemic plant Ambavia gerrardii for antiproliferative activity against the A2780 ovarian cancer cell line led to the isolation of the three new alkaloids 8-hydroxyeupolauridine (1), 9-methoxyeupolauridine 1-oxide (2), and 11-methoxysampangine (3) and the three known alkaloids 4-6. The structures of 1 and 2 were confirmed by synthesis. Compounds 3, 4, and 6 showed moderate to good antiproliferative activities, with IC50 values of 10.3, 3.5, and 0.60 μM, respectively, against the A2780 human ovarian cancer cell line and with IC50 values of 0.57, 1.77, and 0.58 μM, respectively, against the H460 human lung cancer cell line.
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Affiliation(s)
- Ende Pan
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212
| | - Shugeng Cao
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212
| | | | | | - Stephan Rakotonandrasana
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Karen TenDyke
- Next Generation Systems, Eisai Inc., 4 Corporate Drive, Andover, Massachusetts 01810
| | - Yongchun Shen
- Next Generation Systems, Eisai Inc., 4 Corporate Drive, Andover, Massachusetts 01810
| | - Edward M. Suh
- Next Generation Systems, Eisai Inc., 4 Corporate Drive, Andover, Massachusetts 01810
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212
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Pan E, Harinantanaina L, Brodie PJ, Miller JS, Callmander MW, Rakotonandrasana S, Rakotobe E, Rasamison VE, Kingston DGI. Four diphenylpropanes and a cycloheptadibenzofuran from Bussea sakalava from the Madagascar dry forest. J Nat Prod 2010; 73:1792-1795. [PMID: 20942441 PMCID: PMC2993851 DOI: 10.1021/np100411d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Investigation of the endemic Malagasy plant Bussea sakalava for antiproliferative activity against the A2780 ovarian cancer cell line led to the isolation of the four new diphenylpropanes 1-4 and the new cycloheptadibenzofuran 5; compound 5 has a previously unreported natural product skeleton. The structure elucidation of these compounds was based on the analysis of their 1D and 2D NMR and mass spectroscopic data. Compounds 1-5 were tested for antiproliferative activity against the A2780 human ovarian cancer cell line.
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Affiliation(s)
- Ende Pan
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - Liva Harinantanaina
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - James S. Miller
- Missouri Botanical Garden, P. O. Box 299, St. Louis, Missouri 63166-0299
| | | | - Stephan Rakotonandrasana
- Centre National d’Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d’Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
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Pan E, Harinantenaina L, Brodie PJ, Callmander M, Rakotonandrasana S, Rakotobe E, Rasamison VE, Tendyke K, Shen Y, Suh EM, Kingston DGI. Cardenolides of Leptadenia madagascariensis from the Madagascar dry forest. Bioorg Med Chem 2010; 19:422-8. [PMID: 21159516 DOI: 10.1016/j.bmc.2010.11.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Revised: 11/03/2010] [Accepted: 11/05/2010] [Indexed: 11/30/2022]
Abstract
Investigation of the endemic Madagascar plant Leptadenia madagascariensis Decne. (Apocynaceae) for antiproliferative activity against the A2780 ovarian cancer cell line led to the isolation of the four new cardenolides 1-4. The structure elucidations of these compounds were based on analyzes of their 1D and 2D NMR spectra and mass spectrometric data. The cardenolides were strongly antiproliferative to the A2780 ovarian cancer cell line, with IC(50) values of 0.18, 0.21, 0.17, and 0.29μM line, and to the H460 human lung cancer cell line, with IC(50) values of 0.16, 0.68, 0.37, and 0.48μM, respectively.
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Affiliation(s)
- Ende Pan
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
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Harinantenaina L, Brodie PJ, Slebodnick C, Callmander MW, Rakotobe E, Randrianasolo S, Randrianaivo R, Rasamison VE, Tendyke K, Shen Y, Suh EM, Kingston DGI. Antiproliferative compounds from Pongamiopsis pervilleana from the Madagascar Dry Forest. J Nat Prod 2010; 73:1559-62. [PMID: 20804165 PMCID: PMC2945424 DOI: 10.1021/np100430r] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Bioassay-guided fractionation of an ethanol extract of the roots of the endemic Malagasy plant Pongamiopsis pervilleana led to the isolation of the three new compounds (2'R)-4'-hydroxyemoroidocarpan (1), pongavilleanine (3), and epipervilline (4) together with two known compounds, identified as emoroidocarpan (2) and rotenolone (5). The structures of all compounds were determined by physical, chemical, and spectroscopic evidence. The stereochemistry at C-2' of the previously reported compound emoroidocarpan was determined to be R by the observation of a negative Cotton effect at 474 nm in the CD spectrum of its osmate ester derivative. Compounds 2-5 displayed moderate antiproliferative activity against the A2780 human ovarian cancer cell line, and rotenolone also showed micromolar antiproliferative activity toward the breast cancer BT-549, prostate cancer DU 145, NSCLC NCI-H460, and colon cancer HCC-2998 cell lines.
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Affiliation(s)
- Liva Harinantenaina
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0212, USA
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42
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Pan E, Cao S, Brodie PJ, Miller JS, Rakotodrajaona R, Ratovoson F, Birkinshaw C, Andriantsiferana R, Rasamison VE, Kingston DGI. An antiproliferative xanthone of Symphonia pauciflora from the Madagascar rainforest. Nat Prod Commun 2010; 5:751-754. [PMID: 20521541 PMCID: PMC2930018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Abstract
Investigation of a Malagasy endemic plant identified as Symphonia pauciflora Baker (Clusiaceae) for antiproliferative activities against the A2780 ovarian cancer cell line led to the isolation of a new compound identified as 2-(3,3-dimethylallyl)-7-methoxy-l,5,6-trihydroxy-2",2"-dimethylpyrano(6",5":3,4) xanthone (1) and the two known guttiferones A (2) and I (3). The structure elucidation of 1 was based on the analysis of its 1D and 2D NMR and mass spectral data. Compound 1 showed good antiproliferative activity with an IC50 value of 3.8 microM against the A2780 human ovarian cancer cell line, while the known guttiferone analogues (2 and 3) exhibited moderate activities with IC50 values of 8.3 microM and 7.8 microM, respectively.
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Affiliation(s)
- Ende Pan
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Shugeng Cao
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - James S. Miller
- Missouri Botanical Garden, P. O. Box 299, St. Louis, Missouri 63166-0299, USA
| | - Rolland Rakotodrajaona
- Centre National d’Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - Fidy Ratovoson
- Missouri Botanical Garden, B. P. 3391, Antananarivo 101, Madagascar
| | - Chris Birkinshaw
- Missouri Botanical Garden, B. P. 3391, Antananarivo 101, Madagascar
| | - Rabodo Andriantsiferana
- Centre National d’Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
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Pan E, Cao S, Brodie PJ, Miller JS, Rakotodrajaona R, Ratovoson F, Birkinshaw C, Andriantsiferana R, Rasamison VE, Kingston DGI. An antiproliferative xanthone of Symphonia pauciflora from the Madagascar rainforest. Nat Prod Commun 2010. [DOI: 10.1177/1934578x1000500515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Investigation of a Malagasy endemic plant identified as Symphonia pauciflora Baker (Clusiaceae) for antiproliferative activities against the A2780 ovarian cancer cell line led to the isolation of a new compound identified as 2-(3,3-dimethylallyl)-7-methoxy-1,5,6-trihydroxy-2″″,2″″-dimethylpyrano(6″″,5″″:3,4) xanthone (1) and the two known guttiferones A (2) and I (3). The structure elucidation of 1 was based on the analysis of its 1D and 2D NMR and mass spectral data. Compound 1 showed good antiproliferative activity with an IC50 value of 3.8 μM against the A2780 human ovarian cancer cell line, while the known guttiferone analogues (2 and 3) exhibited moderate activities with IC50 values of 8.3 μM and 7.8 μM, respectively.
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Affiliation(s)
- Ende Pan
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Shugeng Cao
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - James S. Miller
- Missouri Botanical Garden, P. O. Box 299, St. Louis, Missouri 63166-0299, USA
| | - Rolland Rakotodrajaona
- Centre National d'Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - Fidy Ratovoson
- Missouri Botanical Garden, B. P. 3391, Antananarivo 101, Madagascar
| | - Chris Birkinshaw
- Missouri Botanical Garden, B. P. 3391, Antananarivo 101, Madagascar
| | - Rabodo Andriantsiferana
- Centre National d'Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d'Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
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Hou Y, Cao S, Brodie PJ, Miller JS, Birkinshaw C, Andrianjafy MN, Andriantsiferana R, Rasamison VE, TenDyke K, Shen Y, Suh EM, Kingston DG. Euphane triterpenoids of Cassipourea lanceolata from the Madagascar rainforest. Phytochemistry 2010; 71:669-674. [PMID: 20074760 PMCID: PMC2847016 DOI: 10.1016/j.phytochem.2009.12.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Revised: 11/30/2009] [Accepted: 12/14/2009] [Indexed: 05/28/2023]
Abstract
Fractionation of an ethanol extract of a Madagascar collection of the leaves and fruit of Cassipourea lanceolata Tul. led to the isolation of three euphane triterpenoids 1-3. The (1)H and (13)C NMR spectra of all compounds were fully assigned using a combination of 2D NMR experiments, including COSY, TOCSY, HSQC (HMQC), HMBC and ROESY sequences. The three compounds showed weak antiproliferative activities against the A2780 human ovarian cancer cell line, with IC(50) values of 25, 25 and 32 microM, respectively.
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Affiliation(s)
- Yanpeng Hou
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212, USA
| | - Shugeng Cao
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212, USA
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212, USA
| | - James S. Miller
- Missouri Botanical Garden, P.O. Box 299, St. Louis, MO 63166-0299, USA
- Missouri Botanical Garden, B.P 3391, Antananarivo 101, Madagascar, USA
| | - Chris Birkinshaw
- Missouri Botanical Garden, P.O. Box 299, St. Louis, MO 63166-0299, USA
- Missouri Botanical Garden, B.P 3391, Antananarivo 101, Madagascar, USA
| | - Mamisoa N. Andrianjafy
- Missouri Botanical Garden, P.O. Box 299, St. Louis, MO 63166-0299, USA
- Missouri Botanical Garden, B.P 3391, Antananarivo 101, Madagascar, USA
| | - Rabodo Andriantsiferana
- Centre National d'Application et Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar, USA
| | - Vincent E. Rasamison
- Centre National d'Application et Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar, USA
| | - Karen TenDyke
- Eisai Inc., 4 Corporate Drive, Andover, MA 01810, USA
| | - Yongchun Shen
- Eisai Inc., 4 Corporate Drive, Andover, MA 01810, USA
| | - Edward M. Suh
- Eisai Inc., 4 Corporate Drive, Andover, MA 01810, USA
| | - David G.I. Kingston
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212, USA
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Cao S, Brodie PJ, Callmander M, Randrianaivo R, Rakotobe E, Rasamison VE, Kingston DGI. Saponins and a lignan derivative of Terminalia tropophylla from the Madagascar Dry Forest. Phytochemistry 2010; 71:95-9. [PMID: 19875137 PMCID: PMC2813959 DOI: 10.1016/j.phytochem.2009.09.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Revised: 08/07/2009] [Accepted: 09/27/2009] [Indexed: 05/25/2023]
Abstract
A study of an EtOH extract obtained from the roots of the Madagascan plant Terminalia tropophylla H. Perrier (Combretaceae) led to isolation of the oleanane-type triterpenoid saponin 1, the lignan derivative 2, and the two known saponins arjunglucoside I (3) and sericoside (4). The structures of compounds 1 (terminaliaside A) and 2 (4'-O-cinnamoyl cleomiscosin A) were elucidated using 1D and 2D NMR experiments and mass spectrometry. Compound 1 showed antiproliferative activity against the A2780 human ovarian cancer cell line with an IC(50) value of 1.2 microM.
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Affiliation(s)
- Shugeng Cao
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
| | | | | | - Etienne Rakotobe
- Centre National d’Application des Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application des Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
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Hou Y, Cao S, Brodie PJ, Callmander MW, Ratovoson F, Rakotobe EA, Rasamison VE, Ratsimbason M, Alumasa JN, Roepe PD, Kingston DGI. Antiproliferative and antimalarial anthraquinones of Scutia myrtina from the Madagascar forest. Bioorg Med Chem 2009; 17:2871-6. [PMID: 19282186 PMCID: PMC2728447 DOI: 10.1016/j.bmc.2009.02.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2009] [Revised: 02/10/2009] [Accepted: 02/11/2009] [Indexed: 11/18/2022]
Abstract
Bioassay-guided fractionation of an ethanol extract of a Madagascar collection of the bark of Scutia myrtina led to the isolation of three new anthrone-anthraquinones, scutianthraquinones A, B and C (1-3), one new bisanthrone-anthraquinone, scutianthraquinone D (4), and the known anthraquinone, aloesaponarin I (5). The structures of all compounds were determined using a combination of 1D and 2D NMR experiments, including COSY, TOCSY, HSQC, HMBC, and ROESY sequences, and mass spectrometry. All the isolated compounds were tested against the A2780 human ovarian cancer cell line for antiproliferative activities, and against the chloroquine-resistant Plasmodium falciparum strains Dd2 and FCM29 for antiplasmodial activities. Compounds 1, 2 and 4 showed weak antiproliferative activities against the A2780 ovarian cancer cell line, while compounds 1-4 exhibited moderate antiplasmodial activities against P. falciparum Dd2 and compounds 1, 2, and 4 exhibited moderate antiplasmodial activities against P. falciparum FCM29.
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Affiliation(s)
- Yanpeng Hou
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
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Abstract
A conformationally restrained epothilone A analogue (3) with a short bridge between methyl groups at C6 and C8 was designed and synthesized. Preliminary biological evaluation indicates 3 to be only weakly active (IC50 = 8.5 microM) against the A2780 human ovarian cancer cell line.
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Affiliation(s)
- Weiqiang Zhan
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Yi Jiang
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Peggy J. Brodie
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - David G. I. Kingston
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - Dennis C. Liotta
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - James P. Snyder
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
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Murphy BT, Cao S, Brodie PJ, Miller JS, Ratovoson F, Birkinshaw C, Rakotobe E, Rasamison VE, Tendyke K, Suh EM, Kingston DGI. Antiproliferative compounds of Artabotrys madagascariensis from the Madagascar rainforest. Nat Prod Res 2008; 22:1169-75. [PMID: 18855218 PMCID: PMC2786269 DOI: 10.1080/14786410701726525] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Bioassay-guided fractionation of an ethanol extract of Artabotrys madagascariensis led to the isolation of the new compound artabotrene (1), two butenolides (2 and 3), and the tetracyclic triterpene polycarpol (4). Structure elucidation was determined on the basis of one and two-dimensional NMR, and absolute configuration of compounds 2-4 was verified by analysis of CD and optical rotation spectra. Two of the isolates, melodorinol (2) and acetylmelodorinol (3), were found to display antiproliferative activity against five different tumour cell lines with IC50 values ranging from 2.4 to 12 microM.
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Affiliation(s)
- Brian T. Murphy
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212, USA
| | - Shugeng Cao
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212, USA
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212, USA
| | - James S. Miller
- Missouri Botanical Garden, P.O. Box 299, St. Louis Missouri 63166-0299
| | - Fidy Ratovoson
- Missouri Botanical Garden, P.O. Box 299, St. Louis Missouri 63166-0299
| | - Chris Birkinshaw
- Missouri Botanical Garden, P.O. Box 299, St. Louis Missouri 63166-0299
| | - Etienne Rakotobe
- Centre National d’Application et Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d’Application et Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Karen Tendyke
- Eisai Research Institute, 4 Corporate Drive, Andover, MA 01810-2441, USA
| | - Edward M. Suh
- Eisai Research Institute, 4 Corporate Drive, Andover, MA 01810-2441, USA
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0212, USA
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Cao S, Brodie PJ, Miller JS, Ratovoson F, Callmander MW, Randrianasolo S, Rakotobe E, Rasamison VE, Suh EM, TenDyke K, Kingston DGI. Antiproliferative cardenolides of an Elaeodendron sp. from the Madagascar rain forest(1). J Nat Prod 2007; 70:1064-7. [PMID: 17547460 PMCID: PMC2464365 DOI: 10.1021/np0701428] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Bioassay-guided fractionation of an ethanol extract obtained from the Madagascar plant Elaeodendron sp. led to the isolation of two new cardenolides, elaeodendrosides T and U (1 and 2). The structures of the new compounds were elucidated using 1D and 2D NMR experiments and mass spectrometry. Compounds 1, 3, 4, and 5 showed significant antiproliferative activity against A2780 human ovarian cancer cells with IC50 values of 0.085, 0.019, 0.19, and 0.10 microM, respectively, while compounds 2 and 6 were less active.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - David G. I. Kingston
- To whom correspondence should be addressed. Tel: (540) 231-6570. Fax: (540) 231-7702. E-mail:
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50
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Cao S, Brodie PJ, Miller JS, Randrianaivo R, Ratovoson F, Birkinshaw C, Andriantsiferana R, Rasamison VE, Kingston DGI. Antiproliferative xanthones of Terminalia calcicola from the Madagascar rain forest. J Nat Prod 2007; 70:679-81. [PMID: 17323994 PMCID: PMC2464362 DOI: 10.1021/np060627g] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
A bioassay-guided fractionation of the EtOH extract of the Madagascan plant Terminalia calcicola led to the isolation of two new cytotoxic xanthones, termicalcicolanone A (1) and termicalcicolanone B (2). The structures of the new compounds were established on the basis of one- and two-dimensional NMR spectroscopic data. Both compounds showed modest antiproliferative activity toward the A2780 human ovarian cancer cell line.
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Affiliation(s)
- Shugeng Cao
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - Peggy J. Brodie
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - James S. Miller
- Missouri Botanical Garden, P. O. Box 299, St. Louis, Missouri 63166-0299
| | | | - Fidy Ratovoson
- Missouri Botanical Garden, B. P. 3391, Antananarivo 101, Madagascar
| | - Chris Birkinshaw
- Missouri Botanical Garden, B. P. 3391, Antananarivo 101, Madagascar
| | - Rabodo Andriantsiferana
- Centre National d'Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d'Application et Recherches Pharmaceutiques, B. P. 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
- To whom correspondence should be addressed. Tel: (540) 231-6570. Fax: (540) 231-7702. E-mail:
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