RESUMO
Seven novel spiromeroterpenoids, asnovolins A-G (1-7), one of which was shown to suppress fibronectin expression, were isolated from Aspergillus novofumigatus CBS117520 along with a known compound, novofumigatonin (8). The structures of asnovolins A-G were elucidated using MS and 2D-NMR data. Asnovolin E (5) suppressed fibronectin expression by normal human neonatal dermal fibroblast cells.
Assuntos
Compostos de Espiro/isolamento & purificação , Compostos de Espiro/farmacologia , Terpenos/isolamento & purificação , Terpenos/farmacologia , Aspergillus/química , Ensaios de Seleção de Medicamentos Antitumorais , Fibronectinas , Humanos , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Compostos de Espiro/química , Terpenos/químicaRESUMO
A proposed structure for schizocommunin (Z)-1(hydroxy) and its geometric isomer (E)-1(hydroxy), which exist in a keto form, has been synthesized. However, the spectroscopic data of (Z)-1(keto) and (E)-1(keto) were not consistent with those reported for natural schizocommunin. After reinvestigating the spectral data for natural schizocommunin, we synthesized the quinazolinone derivative (Z)-2 as a revised structure for schizocommunin. All of the spectral data of (Z)-2 were completely identical to those reported for natural schizocommunin. (Z)-2 showed moderate antiproliferative activity.
Assuntos
Indóis/química , Indóis/síntese química , Ensaios de Seleção de Medicamentos Antitumorais , Células HeLa , Humanos , Indóis/farmacologia , Estrutura Molecular , Estereoisomerismo , Relação Estrutura-AtividadeRESUMO
Two new diketopiperazine metabolites, novoamauromine (1) and ent-cycloechinulin (2) have been isolated from Aspergillus novofumigatus CBS117520. The structures of 1 and 2 were established on the basis of spectroscopic and chemical investigation, including a detailed comparison of the spectroscopic and physico-chemical data of amauromine (3) and cycloechinulin (4).
Assuntos
Antifúngicos , Antineoplásicos , Aspergillus/química , Dicetopiperazinas/química , Antifúngicos/química , Antifúngicos/farmacologia , Antineoplásicos/química , Antineoplásicos/farmacologia , Linhagem Celular Tumoral , Cromatografia Líquida , Fungos/efeitos dos fármacos , Humanos , Espectroscopia de Ressonância Magnética , Testes de Sensibilidade Microbiana , Estrutura MolecularRESUMO
In the course of searching for new antifungal agents, a new cyclic depsipeptide, eujavanicin A (1), was isolated from Eupenicillium javanicum as an antifungal agent against the human pathogenic filamentous fungus Aspergillus fumigatus. The structure of 1 was established by spectroscopic and chemical investigations. The absolute stereochemistry was elucidated by Marfey's method and by chiral HPLC analysis.
Assuntos
Antifúngicos/isolamento & purificação , Antifúngicos/farmacologia , Aspergillus fumigatus/efeitos dos fármacos , Depsipeptídeos/isolamento & purificação , Depsipeptídeos/farmacologia , Antifúngicos/química , Bacillus subtilis/efeitos dos fármacos , Depsipeptídeos/química , Escherichia coli/efeitos dos fármacos , Humanos , Japão , Testes de Sensibilidade Microbiana , Estrutura Molecular , Salmonella enteritidis/efeitos dos fármacos , Staphylococcus aureus/efeitos dos fármacosRESUMO
In the course of screening for hyaluronidase (HAase) inhibitory agents, a new gamma-pyrone derivative, lepidepyrone, C(8)H(10)O(5), was isolated from the cultured mycelium of the mushroom Neolentinus lepideus TMC-1102 as a major HAase inhibitory compound (IC(50) 3.3 mM). The structure of lepidepyrone was established on the basis of spectroscopic investigation.
Assuntos
Basidiomycota/química , Inibidores Enzimáticos/isolamento & purificação , Hialuronoglucosaminidase/antagonistas & inibidores , Pironas/isolamento & purificação , Inibidores Enzimáticos/química , Inibidores Enzimáticos/metabolismo , Inibidores Enzimáticos/farmacologia , Hialuronoglucosaminidase/metabolismo , Concentração Inibidora 50 , Espectrometria de Massas , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Pironas/química , Pironas/metabolismo , Pironas/farmacologia , Espectrofotometria Infravermelho , Espectrofotometria UltravioletaRESUMO
BACKGROUND AND PURPOSE: The typical xerophilic fungi, Aspergillus restrictus, have been very frequently detected in house dust by low water activity medium. Since the composition of fungal allergens are affected culture and extract condition, we considered the influence in A. restrictus in order to develop new allergen of xerophilic fungi. METHOD: The 4 different extract of A. restrictus were obtained from various fermentation and extraction methods. These extracts were studied for specific IgE in sera of patients with asthma. The cross-reactivity between A. restrictus and A. fumigatus were analyzed by enzyme-linked immunosorbent assay (ELISA) inhibition. Then, component analysis of A. restrictus allergens was examined by SDS-PAGE and Western Blotting. RESULT: In ELISA, IgE antibodies against four extracts of A. restrictus were found in sera of 20-48%. In ELISA inhibition using sera obtained from 11 asthma patients, A. fumigatus antigen solution inhibited the reaction of A. restrictus with 5 asthma patients. CONCLUSION: These results indicated that A. restrictus may be important as a causative agent in adult asthma patients. However, it was suggested that some preparation methods of an extract influence activity. Furthermore, cross-reactivity was found between A. restrictus and A. fumigatus.
Assuntos
Alérgenos/imunologia , Aspergillus/imunologia , Asma/imunologia , Fungos/imunologia , Adulto , Alérgenos/isolamento & purificação , Eletroforese em Gel de Poliacrilamida , Ensaio de Imunoadsorção Enzimática , Humanos , Imunoglobulina ERESUMO
Arabidopsis thaliana LUP1 (At1g78970) catalyzes the cyclization of oxidosqualene into lupeol and 3beta,20-dihydroxylupane (lupanediol). The stereochemical course of water addition to the lupanyl cation was studied. The X-ray crystal structure of lupanylepoxide 3,5-dinitrobenzoate established the configuration of epoxide as 20S. LiAlD4 reduction of the epoxide enabled the chemical shift assignment of prochiral methyl groups at C20 of lupanediol. Correlation of these methyl groups with biosynthetic lupanediol from [1,2-(13)C(2)] acetate established the stereochemical course of water addition. [reaction: see text].
Assuntos
Proteínas de Arabidopsis/química , Transferases Intramoleculares/química , Triterpenos/síntese química , Cristalografia por Raios X , Ciclização , Espectroscopia de Ressonância Magnética , Conformação Molecular , Oxirredução , Estereoisomerismo , Água/químicaRESUMO
In screening for antifungal substances, a new macrolide, eushearilide (1), was isolated from Eupenicillium shearii IFM54447. The structure of 1 was established to be 24-membered macrolide having a non-conjugated diene and a choline phosphate ester moetiy on the basis of detailed investigation of NMR, UV, IR and MS spectral data. Compound 1 showed antifungal activity against various fungi and yeasts, including human pathogens Aspergillus fumigatus, Trichophyton spp. and Candida spp.
Assuntos
Antifúngicos/isolamento & purificação , Antifúngicos/farmacologia , Eurotiales/metabolismo , Macrolídeos/isolamento & purificação , Macrolídeos/farmacologia , Fosforilcolina/análogos & derivados , Antifúngicos/química , Aspergillus fumigatus/efeitos dos fármacos , Candida/efeitos dos fármacos , Macrolídeos/química , Testes de Sensibilidade Microbiana , Estrutura Molecular , Fosforilcolina/química , Fosforilcolina/isolamento & purificação , Fosforilcolina/farmacologia , Análise Espectral , Trichophyton/efeitos dos fármacosRESUMO
Three new phthalide derivatives, emefuranones A1, A2 and B (1-3); six new phthalane derivatives, emefuran A, B1, B2, C1, C2 and D (4-9); three new farnesylated phthalide derivatives, farnesylemefuranones A-C (10-12); xylarinol C (13); and emericelloxide (14), along with four known compounds (dustanin, sorbicillin, aspergillodiol and xylarinol A), were isolated from the culture extracts of Emericella sp. IFM57991. Structures of 1-14 were elucidated on the basis of spectroscopic analysis and chemical evidence. Compounds 4-7 and 13 showed moderate antibacterial activities against Bacillus subtilis.
Assuntos
Anti-Infecciosos/farmacologia , Bacillus subtilis/efeitos dos fármacos , Benzofuranos/farmacologia , Meios de Cultura/química , Emericella/metabolismo , Ftalimidas/farmacologia , Anti-Infecciosos/química , Anti-Infecciosos/isolamento & purificação , Benzofuranos/química , Benzofuranos/isolamento & purificação , Testes de Sensibilidade a Antimicrobianos por Disco-Difusão , Emericella/crescimento & desenvolvimento , Humanos , Espectroscopia de Ressonância Magnética , Modelos Moleculares , Estrutura Molecular , Ftalimidas/química , Ftalimidas/isolamento & purificaçãoRESUMO
Screening of Malbranchea filamentosa IFM 41300 for bioactive compounds led to the identification of 4-benzyl-3-phenyl-5H-furan-2-one (1) as a vasodilator and erythroglaucin (2). The structure of 1 was established on the basis of spectroscopic and chemical investigations. Compound 1 inhibited Ca2+-induced vasocintraction in aortic rings pretreated with high K+ (60mM) or norepinephrine. Finally, compound 1 did not exhibit activity against human pathogenic microorganisms.
Assuntos
Compostos de Benzil/química , Compostos de Benzil/farmacologia , Furanos/química , Furanos/farmacologia , Onygenales/química , Vasodilatadores/química , Vasodilatadores/farmacologia , Animais , Aorta Torácica/efeitos dos fármacos , Aorta Torácica/fisiologia , Compostos de Benzil/isolamento & purificação , Cálcio/farmacologia , Relação Dose-Resposta a Droga , Furanos/isolamento & purificação , Técnicas In Vitro , Espectroscopia de Ressonância Magnética , Masculino , Testes de Sensibilidade Microbiana , Estrutura Molecular , Potássio/farmacologia , Ratos , Ratos Wistar , Espectrometria de Massas por Ionização por ElectrosprayRESUMO
The structure of a diterpenoid, designated salvigresin, that was isolated from the aerial parts of Salvia greggii, has been confirmed by spectroscopic investigation and X-ray analysis.
Assuntos
Diterpenos/química , Salvia/química , Diterpenos/isolamento & purificação , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Componentes Aéreos da Planta/química , Difração de Raios XRESUMO
The structure of four diterpenoid glucosides, designated as salvigresides A-D (1-4), isolated from the aerial parts of Salvia greggii, have been confirmed by spectroscopic and chemical investigation.
Assuntos
Diterpenos/química , Glucosídeos/química , Salvia/química , Diterpenos/isolamento & purificação , Diterpenos/farmacologia , Glucosídeos/isolamento & purificação , Glucosídeos/farmacologia , Espectroscopia de Ressonância Magnética , Testes de Sensibilidade Microbiana , Estrutura MolecularRESUMO
In the screening of searching for new antifungal agents, a new nonaride compound, dihydroepiheveadride (1), was isolated from unidentified fungus IFM 52672 as the most potent antifungal principle from this organism. The structure of 1 was established on the basis of spectroscopic and chemical investigation, as well as detailed comparison of the spectroscopic and physico-chemical data of the oxidized derivative (3) from 1 with those of heveadride (2). Compound 1 showed strong antifungal activity against various filamentous fungi including human pathogens Aspergillus fumigatus, Penicillium marneffei and Trichophyton spp. It also showed the growth inhibition activity against certain human pathogenic yeasts such as Trichosporon species, while it had weak or no antifungal activity against Candida spp. and Cryptococcus neoformans, and no antibacterial activity against Bacillus subtilis nor against Escherichia coli. The antifungal potencies of compounds 2 and 3 were found to be weaker than that of 1.
Assuntos
Anidridos , Antifúngicos , Fungos/metabolismo , Compostos Heterocíclicos com 3 Anéis , Anidridos Maleicos , Anidridos/química , Anidridos/isolamento & purificação , Anidridos/farmacologia , Antifúngicos/química , Antifúngicos/isolamento & purificação , Antifúngicos/farmacologia , Bactérias/efeitos dos fármacos , Fungos/efeitos dos fármacos , Compostos Heterocíclicos com 3 Anéis/química , Compostos Heterocíclicos com 3 Anéis/isolamento & purificação , Compostos Heterocíclicos com 3 Anéis/farmacologia , Humanos , Anidridos Maleicos/química , Anidridos Maleicos/isolamento & purificação , Anidridos Maleicos/farmacologia , Testes de Sensibilidade Microbiana , Relação Estrutura-AtividadeRESUMO
Three new quinazolinobenzodiazepine derivatives, novobenzomalvins A (1), B (2), and C (3), have been isolated as fibronectin expression regulators from Aspergillus novofumigatus CBS117520. The structures of 1 to 3 were established by spectroscopic and physicochemical analysis, and chemical investigation including the total synthesis of 1. Treatment with novo-benzomalvins A (1), B (2), C (3), and N-methylnovobenzomalvin A (5) increased the expression of fibronectin in normal human neonatal dermal fibroblast cells.
Assuntos
Antineoplásicos/farmacologia , Ascomicetos/metabolismo , Glicosídeos/farmacologia , Peptídeos/farmacologia , Esteroides/farmacologia , Antineoplásicos/química , Antineoplásicos/metabolismo , Ascomicetos/química , Glicosídeos/química , Glicosídeos/metabolismo , Estrutura Molecular , Peptídeos/química , Peptídeos/metabolismo , Esteroides/química , Esteroides/metabolismoRESUMO
In a screen searching for new bioactive agents, a new indoloditerpene, penijanthine A (1), was isolated from Penicillium janthinellum IFM 55557. The structure of 1 was established on the basis of spectroscopic and chemical investigation, as well as detailed comparison with the spectroscopic and physico-chemical data of paxilline (2), which was isolated along with 1.
Assuntos
Diterpenos/química , Diterpenos/isolamento & purificação , Indóis/química , Penicillium/química , Antifúngicos/química , Antifúngicos/isolamento & purificação , Antifúngicos/farmacologia , Aspergillus fumigatus/efeitos dos fármacos , Diterpenos/farmacologia , Espectroscopia de Ressonância Magnética , Testes de Sensibilidade Microbiana , Estrutura MolecularRESUMO
Fifteen derivatives of falconensin were examined for their inhibitory activity against the induction of ear edema in mouse ear by application of 12-O-tetradecanoylphorbol-13-acetate (TPA). It was demonstrated that azaphilonoid falconensins exert inhibitory effects against TPA-induced inflammation in the ears of mice to a comparable degree as moascorubrin and indomethacin, which are known to have antitumor-promoting and anti-inflammatory effects. All compounds tested, except monomethylmitorubrin, inhibited the inflammatory activity induced by TPA.
Assuntos
Anti-Inflamatórios/farmacologia , Benzopiranos/farmacologia , Emericella/química , Inflamação/tratamento farmacológico , Pigmentos Biológicos/farmacologia , Animais , Anti-Inflamatórios/química , Anti-Inflamatórios/isolamento & purificação , Benzopiranos/química , Benzopiranos/isolamento & purificação , Modelos Animais de Doenças , Orelha/patologia , Edema/induzido quimicamente , Edema/tratamento farmacológico , Feminino , Indometacina/farmacologia , Inflamação/induzido quimicamente , Camundongos , Camundongos Endogâmicos ICR , Pigmentos Biológicos/química , Pigmentos Biológicos/isolamento & purificação , Relação Estrutura-Atividade , Acetato de Tetradecanoilforbol/toxicidadeRESUMO
We examined the sensitivity of the cough reflex to inhaled citric acid in guinea pigs that had been actively sensitized with the protein fraction of Aspergillus restrictus strain A-17. The number of coughs elicited by an aerosol of 5% citric acid was significantly increased in the sensitized group compared to the non-sensitized group. The number of citric-acid-induced coughs in sensitized guinea pigs was dose-dependently and significantly reduced to the level in non-sensitized guinea pigs when animals were pretreated with fexofenadine, a selective histamine H1 receptor antagonist, 60min before citric acid inhalation. The bronchial responsiveness to inhaled methacholine or histamine in the sensitized group was not significantly heightened compared to the non-sensitized group. These results suggest that active sensitization with the protein fraction of A. restrictus by itself, that is without subsequent allergen challenge, enhances the excitability of cough receptors to tussive stimuli, and the physiologic features of this animal model are consistent with those of atopic cough.
Assuntos
Antígenos de Fungos/imunologia , Aspergillus/imunologia , Tosse/imunologia , Proteínas Fúngicas/imunologia , Hipersensibilidade Respiratória/imunologia , Administração por Inalação , Animais , Antitussígenos/administração & dosagem , Antitussígenos/farmacologia , Hiper-Reatividade Brônquica/induzido quimicamente , Hiper-Reatividade Brônquica/imunologia , Hiper-Reatividade Brônquica/fisiopatologia , Broncoconstritores/administração & dosagem , Broncoconstritores/farmacologia , Ácido Cítrico , Tosse/induzido quimicamente , Tosse/fisiopatologia , Relação Dose-Resposta a Droga , Cobaias , Histamina/administração & dosagem , Histamina/farmacologia , Agonistas dos Receptores Histamínicos/administração & dosagem , Agonistas dos Receptores Histamínicos/farmacologia , Antagonistas não Sedativos dos Receptores H1 da Histamina/administração & dosagem , Antagonistas não Sedativos dos Receptores H1 da Histamina/farmacologia , Masculino , Cloreto de Metacolina/administração & dosagem , Cloreto de Metacolina/farmacologia , Hipersensibilidade Respiratória/induzido quimicamente , Hipersensibilidade Respiratória/fisiopatologia , Terfenadina/administração & dosagem , Terfenadina/análogos & derivados , Terfenadina/farmacologiaRESUMO
Three new decalin derivatives, eujavanicols A-C (1-3), were isolated from an extract of Eupenicillium javanicum IFM 54704. Their structures were determined by chemical and spectroscopic methods.
Assuntos
Eurotiales/química , Naftalenos/química , Naftalenos/isolamento & purificação , Japão , Estrutura Molecular , Ressonância Magnética Nuclear BiomolecularRESUMO
Three new type indoloditerpenes, emindoles PA (1), PB (2), and PC (3), were isolated from the mycelium of Emericella purpurea along with the sesterterpenes variecolol and variecolactone, and the dicyanide derivatives epurpurins A to C. The structures of 1-3 were confirmed by the spectroscopic investigation. The structure of emindoles PA (1) was revised from our preliminary report. Emindoles PA (1), PB (2), and PC (3) are the indoloditerpenes having a new type of carbon skeleton.