ABSTRACT
Seven new limonoids, namely, xylorumphiins E-J (1-2 and 4-7) and 2-hydroxyxylorumphiin F (3), along with three known derivatives (8-10), were isolated from the seeds of Xylocarpus rumphii. 2-Hydroxyxylorumphiin F (3) and xylorumphiin I (6) displayed moderate inhibitory activity against nitric oxide production from lipopolysaccharide-activated macrophages with IC50 values of 24.5 and 31.3 µM, respectively.
Subject(s)
Anti-Inflammatory Agents/isolation & purification , Anti-Inflammatory Agents/pharmacology , Limonins/isolation & purification , Limonins/pharmacology , Seeds/chemistry , Anti-Inflammatory Agents/chemistry , Inhibitory Concentration 50 , Limonins/chemistry , Lipopolysaccharides/pharmacology , Macrophages/drug effects , Molecular Structure , Nitric Oxide/biosynthesis , Nuclear Magnetic Resonance, Biomolecular , ThailandABSTRACT
Endophytic fungi are known as a prolific source for the discovery of structurally interesting and biologically active secondary metabolites, some of which are promising candidates for drug development. In the present study, three anthranoids were isolated from an Alternaria sp. endophytic fungus and evaluated for their antiangiogenic activity in a rat aortic sprouting assay, an ex vivo model of angiogenesis. Of these three compounds, altersolanol (2) was further characterized and found to show a promising activity in ex vivo, in vitro and in vivo angiogenesis asssays. Using human umbilical vein endothelial cells as an in vitro model, the angiogenic effect of 2 was found to occur via suppression of all three main functions of endothelial cells, namely proliferation, tube formation and migration.
Subject(s)
Alternaria/chemistry , Angiogenesis Inhibitors/isolation & purification , Anthraquinones/isolation & purification , Endophytes/chemistry , Erythrina/microbiology , Alternaria/isolation & purification , Animals , Anthraquinones/pharmacology , Endophytes/isolation & purification , Human Umbilical Vein Endothelial Cells , Male , Mice , Mice, Inbred C57BL , Neovascularization, Physiologic/drug effects , Plants, Medicinal/microbiology , Rats , Rats, WistarABSTRACT
Two new rearranged limonoids, harperforatin (1) and harperfolide (2), and a new chromone, harperamone (3), were isolated from fruits and roots of Harrisonia perforata, together with eight known compounds. Their structures were elucidated on the basis of spectroscopic data. Harperfolide (2) exhibited potent anti-inflammatory activity by suppressing nitric oxide (NO) production from activated macrophages with IC50 value of 6.51 µM. Furthermore, its effect is mediated by reduction of iNOS protein expression, attributable to the inhibitory action of LPS-induced NO production.
Subject(s)
Anti-Inflammatory Agents, Non-Steroidal/pharmacology , Chromones/pharmacology , Limonins/pharmacology , Simaroubaceae/chemistry , Animals , Anti-Inflammatory Agents, Non-Steroidal/chemistry , Anti-Inflammatory Agents, Non-Steroidal/isolation & purification , Chromones/chemistry , Chromones/isolation & purification , Dose-Response Relationship, Drug , Limonins/chemistry , Limonins/isolation & purification , Lipopolysaccharides/antagonists & inhibitors , Lipopolysaccharides/pharmacology , Macrophages/drug effects , Macrophages/metabolism , Mice , Models, Molecular , Molecular Structure , Nitric Oxide/antagonists & inhibitors , Nitric Oxide/biosynthesis , Nitric Oxide Synthase Type II/antagonists & inhibitors , Nitric Oxide Synthase Type II/biosynthesis , Structure-Activity RelationshipABSTRACT
THE TITLE COMPOUND (SYSTEMATIC NAME: methyl 2-{(1R,2R)-2-[(1aS,4S,4aS,8aS)-4-(furan-3-yl)-4a-methyl-8-methyl-ene-2-oxoocta-hydro-oxireno[2,3-d]isochromen-7-yl]-2,6,6-trimethyl-5-oxocyclo-hex-3-en-1-yl}acetate), C(27)H(32)O(7), was isolated from X. moluccensis seeds from Thailand. The conformations of the six-membered rings are distorted half-chair, chair and half-chair for the isolated cyclo-hexane, fused cyclo-hexane and lactone rings, respectively. In addition, the lactone ring bears in an equatorial orientation an essentially planar furan ring (r.m.s. deviation = 0.004â Å), which forms an angle of 63.87â (13)° with the mean plane defined by the ten atoms of the two fused six-membered rings (r.m.s. deviation = 0.213â Å). The absolute configuration was fixed on the basis of literature data.
ABSTRACT
As part of our ongoing efforts to investigate natural products with potential for use as cancer treatments, we have recently disclosed the cytotoxicity of unique nor-chamigrane (1) and chamigrane (2, 3) endoperoxides from a Thai mangrove-derived fungus. Reinvestigation of this fungus in a large-scale fermentation led to the isolation of an additional new chamigrane endoperoxide (4) and one known analogue (5). Among these isolated metabolites, compound 3 (merulin C) exhibited potent antiangiogenic activity mainly by suppression of endothelial cell proliferation and migration in a dose-dependent manner, and its effect is mediated by reduction in the phosphorylation of Erk1/2. Merulin C also displayed promising activity in a rat aortic ring sprouting (ex vivo) and a mouse Matrigel (in vivo) assay.
Subject(s)
Angiogenesis Inhibitors/isolation & purification , Angiogenesis Inhibitors/pharmacology , Basidiomycota/chemistry , Peroxides/isolation & purification , Peroxides/pharmacology , Angiogenesis Inhibitors/chemistry , Animals , Aorta/drug effects , Dose-Response Relationship, Drug , Meliaceae/microbiology , Mice , Molecular Structure , Peroxides/chemistry , Plant Leaves/microbiology , Rats , ThailandABSTRACT
A new andirobin, thaimoluccensin A (1), and two new phragmalin-type limonoids, thaimoluccensins B (2) and C (3), were isolated from seeds of a Thai mangrove plant, Xylocarpus moluccensis, together with eight known compounds. The structures of these compounds were elucidated on the basis of spectroscopic data. Only 7-deacetylgedunin (7), a gedunin-type limonoid, exhibited significant inhibitory activity against nitric oxide production from activated macrophages with IC(50) value less than 10 µM, suggesting that the compound has anti-inflammatory activity.
Subject(s)
Anti-Inflammatory Agents/chemistry , Coumarins/chemistry , Limonins/chemistry , Meliaceae/chemistry , Anti-Inflammatory Agents/isolation & purification , Anti-Inflammatory Agents/pharmacology , Coumarins/isolation & purification , Coumarins/pharmacology , Humans , Limonins/isolation & purification , Limonins/pharmacology , Macrophages/drug effects , Macrophages/immunology , Magnetic Resonance Spectroscopy , Molecular Conformation , Nitric Oxide/metabolism , Seeds/chemistry , ThailandABSTRACT
A new butenolide, aspernolide D (1), and furandione, asperterone (2), together with four known butenolides, butyrolactones I-IV and aspernolide B, were obtained from cultures of the endophytic fungus Aspergillus terreus, isolated from the flowering plant Mammea siamensis. The structures of these compounds were elucidated by analysis of NMR spectroscopic and mass spectrometric data.
Subject(s)
4-Butyrolactone/analogs & derivatives , Anti-Bacterial Agents/isolation & purification , Anti-Bacterial Agents/pharmacology , Aspergillus/chemistry , Furans/isolation & purification , Furans/pharmacology , 4-Butyrolactone/chemistry , 4-Butyrolactone/isolation & purification , 4-Butyrolactone/pharmacology , Anti-Bacterial Agents/chemistry , Bacteria/drug effects , Bacterial Infections/drug therapy , Furans/chemistry , Magnetic Resonance Spectroscopy , Mammea/microbiology , Mass SpectrometryABSTRACT
A new nor-chamigrane endoperoxide, merulin A (1), and two new chamigrane endoperoxides, merulins B and C (2, 3), were isolated from the culture broth extract of an endophytic fungus of Xylocarpus granatum. Their structures were elucidated on the basis of spectroscopic, mainly NMR and MS, data. X-ray crystallographic analysis confirmed the structure of 1. Compounds 1 and 3 displayed significant cytotoxicity against human breast (BT474) and colon (SW620) cancer cell lines.
Subject(s)
Antineoplastic Agents/isolation & purification , Antineoplastic Agents/pharmacology , Basidiomycota/chemistry , Peroxides/isolation & purification , Peroxides/pharmacology , Antineoplastic Agents/chemistry , Breast Neoplasms/drug therapy , Crystallography, X-Ray , Drug Screening Assays, Antitumor , Female , Humans , Molecular Conformation , Molecular Structure , Nuclear Magnetic Resonance, Biomolecular , Peroxides/chemistryABSTRACT
Three new phragmalin limonoids, moluccensins H-J (1-3), were isolated from seed kernels of the cedar mangrove, Xylocarpus moluccensis. Their structures were established by extensive spectroscopic analysis. Compound 2 displayed weak antibacterial activity against Staphylococcus hominis and Enterococcus faecalis.
Subject(s)
Anti-Bacterial Agents/isolation & purification , Limonins/isolation & purification , Anti-Bacterial Agents/chemistry , Anti-Bacterial Agents/pharmacology , Enterococcus faecalis/drug effects , Female , Humans , Limonins/chemistry , Limonins/pharmacology , Meliaceae/chemistry , Microbial Sensitivity Tests , Molecular Structure , Seeds/chemistry , Staphylococcus hominis/drug effects , ThailandABSTRACT
Three new protolimonoids, protoxylocarpins F-H (1-3), along with 11 known limonoids, were isolated from seed kernels of Xylocarpus granatum. Their structures were elucidated on the basis of extensive spectroscopic data analyses. All compounds isolated were evaluated for cytotoxic activity against five human tumor cell lines.
Subject(s)
Limonins/isolation & purification , Meliaceae/chemistry , Drug Screening Assays, Antitumor , Humans , Limonins/chemistry , Limonins/pharmacology , Molecular Structure , Seeds/chemistry , ThailandABSTRACT
A new analogue of monocerin, 11-hydroxymonocerin (2), along with monocerin (1) and 12-hydroxymonocerin (3) were isolated from cultures of Exserohilum rostratum, a fungal strain endophytic in Stemona sp. The structure of 2 was determined by analysis of NMR and MS data and by comparison of spectroscopic data to those of 1. Monocerin (1) and 11-hydroxymonocerin (2) displayed activity against Plasmodium falciparum (K1, multidrug-resistant strain) with IC50 values of 0.68 and 7.70 microM, respectively. None of the compounds were cytotoxic against any of the tumor cell lines tested.
Subject(s)
Ascomycota/chemistry , Lactones/isolation & purification , Animals , Drug Resistance, Multiple/drug effects , Drug Screening Assays, Antitumor , Humans , Lactones/chemistry , Lactones/pharmacology , Molecular Structure , Plant Leaves/microbiology , Plasmodium falciparum/drug effects , Stemonaceae/microbiologyABSTRACT
Three new cassane furanoditerpenoids ( 1- 3), together with 13 known cassane diterpenes ( 4- 16), were isolated from the EtOAc extract of the seed kernels of Caesalpinia bonduc. Their structures were elucidated on the basis of spectroscopic analysis, mainly NMR and MS. Compounds 1- 3 exhibited good antimalarial activity against the multidrug-resistant K1 strain of Plasmodium falciparum, while compound 4 was inactive. None of the compounds were cytotoxic against any of the tumor cell lines tested.
Subject(s)
Antimalarials/isolation & purification , Caesalpinia/chemistry , Diterpenes/isolation & purification , Plants, Medicinal/chemistry , Plasmodium falciparum/drug effects , Animals , Antimalarials/chemistry , Antimalarials/pharmacology , Diterpenes/chemistry , Diterpenes/pharmacology , Drug Screening Assays, Antitumor , Molecular Structure , Seeds/chemistry , ThailandABSTRACT
Four novel furanocembranoids (1-4) were isolated from the stem bark of Croton oblongifolius. Their structures were elucidated on the basis of spectroscopic analysis, mainly NMR and MS. Compounds 1, 3, and 4 exhibited good cytotoxicity against several human tumor cell lines.
Subject(s)
Antineoplastic Agents, Phytogenic/isolation & purification , Croton/chemistry , Diterpenes/isolation & purification , Plants, Medicinal/chemistry , Antineoplastic Agents, Phytogenic/chemistry , Antineoplastic Agents, Phytogenic/pharmacology , Diterpenes/chemistry , Diterpenes/pharmacology , Drug Screening Assays, Antitumor , Humans , Molecular Structure , Nuclear Magnetic Resonance, Biomolecular , Plant Bark/chemistry , ThailandABSTRACT
Labda-7,12( E),14-triene-17-oic acid, previously isolated from Croton oblongifolius, and its derivatives were investigated for cytotoxicity against five human tumor cell lines. Six of these compounds, labda-7,12( E),14-triene-17-al, 17-hydroxylabda-7,12( E),14-triene, 17-acetoxylabda-7,12( E),14-triene, 15-hydroxylabda-7,13( E)-diene-17,12-olide, labda-7,13( E)-diene-17,12-olide, and 12,17-dihydroxylabda-7,13( E)-diene showed non-specific, moderate, cytotoxicity against all cell lines, whereas the other compounds were inactive.
