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1.
Cell Biochem Funct ; 42(7): e4120, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39215681

RESUMEN

Celastrus orbiculatus Thunb. is a vine used as a traditional Chinese medicinal herb. In this study, we focused on the anticancer cytotoxicity and underlying mechanism of previously unreported 3-oxygen-substituted isoflavone analogue (3-benzyloxychromone, 3-Boc) from the herb. Initially, we established cell line-derived xenograft mouse model using H1299 non-small cell lung cancer (NSCLC) cells and found that the ethanol crude extracts of the stem part of C. orbiculatus (200 mg/kg) could substantially suppress the growth of xenograft tumors in athymic nu/nu mice. We compared 3-Boc with three other flavonoid analogues isolated from the stem part of C. orbiculatus. Among these, 3-Boc showed the most potent cytotoxicity against H1299 and H1975 NSCLC cells. Colony formation, EdU incorporation and Annexin V-FITC/PI apoptosis assays demonstrated that 3-Boc induced growth inhibition primarily by inhibiting DNA replication and inducing apoptotic death of NSCLC cells. Structure-based target prediction and MD simulation suggested that 3-Boc potentially suppressed the activity of glycogen synthase kinase-3ß (GSK-3ß) by interacting with the ATP-binding site. Western blot analysis indicated that 3-Boc triggered the phosphorylation of Serine 21 of GSK-3α or Serine 9 of GSK-3ß in a time- and dose-dependent manner. To investigate the dependency of GSK-3ß, we established GSK-3ß knockout in H1299 cells. Depletion of GSK-3ß enhanced 3-Boc-induced cytotoxicity compared with wild-type counterparts through activated c-Jun/ATF2 signaling pathway. Altogether, our study highlights the anticancer potential of C. orbiculatus and the discovery of novel 3-oxygen-substituted chromone from the herb, which may have important implications for screening promising modulators of GSK-3ß and related signaling pathways in the treatment of cancer.


Asunto(s)
Factor de Transcripción Activador 2 , Carcinoma de Pulmón de Células no Pequeñas , Celastrus , Glucógeno Sintasa Quinasa 3 beta , Neoplasias Pulmonares , Ratones Desnudos , Glucógeno Sintasa Quinasa 3 beta/metabolismo , Humanos , Carcinoma de Pulmón de Células no Pequeñas/tratamiento farmacológico , Carcinoma de Pulmón de Células no Pequeñas/patología , Carcinoma de Pulmón de Células no Pequeñas/metabolismo , Neoplasias Pulmonares/tratamiento farmacológico , Neoplasias Pulmonares/patología , Neoplasias Pulmonares/metabolismo , Animales , Celastrus/química , Ratones , Factor de Transcripción Activador 2/metabolismo , Cromonas/farmacología , Cromonas/química , Cromonas/aislamiento & purificación , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Antineoplásicos Fitogénicos/farmacología , Antineoplásicos Fitogénicos/química , Antineoplásicos Fitogénicos/aislamiento & purificación , Apoptosis/efectos de los fármacos , Transducción de Señal/efectos de los fármacos , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/aislamiento & purificación , Ensayos de Selección de Medicamentos Antitumorales , Ensayos Antitumor por Modelo de Xenoinjerto
2.
Fitoterapia ; 176: 106012, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38744381

RESUMEN

One of the primary applications for agarwood lies in the extracts, instead, there are obvious differences in the demands for agarwood components with different application fields. To obtain the rough separation and clarify each part's activity, four extracts of essential oil, hydrolat, extractum, and ethanol precipitation from traditional agarwood (TraA) and "Qinan" agarwood (QinA) were obtained by steam-solvent multistage extraction and ethanol precipitation. We investigated the chemistry and biological activity of multistage extracts using gas chromatography-mass spectrometry (GC-MS), high-performance liquid chromatography (HPLC), and in vitro activity testing. The results demonstrated that two kinds of agarwood essential oils contained mainly sesquiterpenoids, yet the sesquiterpene species were remarkably diverse in two kinds of agarwood essential oils. Then, the TraA and QinA hydrolat, all predominantly aromatic and sesquiterpene, but with differences from the essential oil ingredients. Additionally, the extractum chiefly contained chromones and the ethanol precipitation method worked well to separate the impurities in the TraA extract, however, it was ineffective for the QinA extract. Ultimately, essential oils and extractums all have antioxidant properties, with extractums outperforming essential oils. Moreover, both extractums and essential oils exhibited excellent broad-spectrum antimicrobial activity and anti-inflammatory activity. The findings pointed to the feasibility of separating the primary components from TraA and QinA using a multi-stage extraction technique, providing a scientific basis for the efficient utilization of all components of agarwood, as well as the functional product development and differentiated utilization of extract products in incense, fragrance, perfume, and daily chemicals.


Asunto(s)
Cromatografía de Gases y Espectrometría de Masas , Aceites Volátiles , Extractos Vegetales , Sesquiterpenos , Thymelaeaceae , Thymelaeaceae/química , Aceites Volátiles/química , Aceites Volátiles/farmacología , Extractos Vegetales/química , Extractos Vegetales/farmacología , Sesquiterpenos/farmacología , Sesquiterpenos/aislamiento & purificación , Cromatografía Líquida de Alta Presión , Fitoquímicos/farmacología , Fitoquímicos/aislamiento & purificación , Fitoquímicos/química , Madera/química , Antioxidantes/farmacología , Antioxidantes/aislamiento & purificación , Antioxidantes/química , Cromonas/aislamiento & purificación , Cromonas/farmacología , Cromonas/química
3.
Phytochemistry ; 224: 114166, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38810815

RESUMEN

Plants of the Garcinia genus were rich in structurally diverse and naturally bioactive components, while limited studies have been reported for Garcinia pedunculata Roxb. and G. nujiangensis C. Y. Wu & Y. H. Li. Four previously undescribed compounds including three chromones, garpedunchromones A-C (1-3), and one biflavonoid, nujiangbiflavone A (14), along with fifteen known analogs (4-13, 15-19) were isolated from G. pedunculata and G. nujiangensis. The structures of the isolated compounds were determined based on their HRESIMS data, extensive NMR spectroscopic analyses, and ECD calculations. The chromone derivatives were isolated from Garcinia for the first time. Compound 14 was a rare biflavonoid with C-3─C-6″ linkage. The biological evaluation of these isolates against NO production was conducted in the LPS-induced RAW 264.7 cells, resulting in the identification of a series of potent NO inhibitors, of which garpedunchromone B (2) was the most active with an IC50 value of 18.11 ± 0.96 µM. In the network pharmacology studies, the potential targets of compounds and inflammation were obtained from PharmMapper and GeneCards database. GO and KEGG enrichment analysis revealed that the overlapped targets were closely related to the major pathogenic processes linked to inflammation. Garpedunchromone B and proteins binding sites were being predicted.


Asunto(s)
Antiinflamatorios , Biflavonoides , Cromonas , Garcinia , Garcinia/química , Biflavonoides/química , Biflavonoides/farmacología , Biflavonoides/aislamiento & purificación , Cromonas/química , Cromonas/farmacología , Cromonas/aislamiento & purificación , Ratones , Animales , Células RAW 264.7 , Antiinflamatorios/farmacología , Antiinflamatorios/química , Antiinflamatorios/aislamiento & purificación , Relación Estructura-Actividad , Estructura Molecular , Lipopolisacáridos/farmacología , Lipopolisacáridos/antagonistas & inhibidores , Óxido Nítrico/antagonistas & inhibidores , Óxido Nítrico/biosíntesis , Relación Dosis-Respuesta a Droga
4.
Bioorg Chem ; 147: 107329, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38608410

RESUMEN

By co-culturing two endophytic fungi (Chaetomium virescens and Xylaria grammica) collected from the medicinal and edible plant Smilax glabra Roxb. and analyzing them with MolNetEnhancer module on GNPS platform, seven undescribed chromone-derived polyketides (chaetoxylariones A-G), including three pairs of enantiomer ones (2a/2b, 4a/4b and 6a/6b) and four optical pure ones (1, 3, 5 and 7), as well as five known structural analogues (8-12), were obtained. The structures of these new compounds were characterized by NMR spectroscopy, single-crystal X-ray diffraction, 13C NMR calculation and DP4+ probability analyses, as well as the comparison of the experimental electronic circular dichroism (ECD) data. Structurally, compound 1 featured an unprecedented chromone-derived sulfonamide tailored by two isoleucine-derived δ-hydroxy-3-methylpentenoic acids via the acylamide and NO bonds, respectively; compound 2 represented the first example of enantiomeric chromone derivative bearing a unique spiro-[3.3]alkane ring system; compound 3 featured a decane alkyl side chain that formed an undescribed five-membered lactone ring between C-7' and C-10'; compound 4 contained an unexpected highly oxidized five-membered carbocyclic system featuring rare adjacent keto groups; compound 7 featured a rare methylsulfonyl moiety. In addition, compound 10 showed a significant inhibition towards SW620/AD300 cells with an IC50 value of PTX significantly decreased from 4.09 µM to 120 nM, and a further study uncovered that compound 10 could obviously reverse the MDR of SW620/AD300 cells.


Asunto(s)
Antineoplásicos , Chaetomium , Cromonas , Ensayos de Selección de Medicamentos Antitumorales , Policétidos , Xylariales , Cromonas/química , Cromonas/farmacología , Cromonas/aislamiento & purificación , Policétidos/química , Policétidos/farmacología , Policétidos/aislamiento & purificación , Estructura Molecular , Xylariales/química , Chaetomium/química , Humanos , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/aislamiento & purificación , Relación Estructura-Actividad , Relación Dosis-Respuesta a Droga , Línea Celular Tumoral , Técnicas de Cocultivo , Proliferación Celular/efectos de los fármacos
5.
Phytochemistry ; 222: 114108, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38663825

RESUMEN

Twelve undescribed 2-(2-phenethyl)chromone dimers (1-12) were isolated from EtOAc extract of agarwood originating from Aquilaria filaria in the Philippines, guided by a UHPLC-MS analysis. Their structures were elucidated by 1D NMR, 2D NMR, and HR-ESI-MS spectra. The absolute configuration of 2-(2-phenylethyl)chromone dimers was determined by single-crystal X-ray diffraction analysis and comparison of the experimental and calculated ECD spectra. Compounds 1, 2, 5 and 9-12 exhibited potent to moderate anti-inflammatory activity with IC50 values in the range of 22.43 ± 0.86 to 53.88 ± 4.06 µM.


Asunto(s)
Cromonas , Thymelaeaceae , Madera , Thymelaeaceae/química , Filipinas , Cromonas/química , Cromonas/aislamiento & purificación , Cromonas/farmacología , Estructura Molecular , Madera/química , Animales , Relación Estructura-Actividad , Ratones , Relación Dosis-Respuesta a Droga , Cristalografía por Rayos X , Flavonoides
6.
Mar Drugs ; 22(4)2024 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-38667798

RESUMEN

Three pairs of enantiomers (1-3)-the new 12R-aloesol (1a) and two new fatty acids (2 and 3)-and one new natural product (4) together three known compounds (5-7) were isolated from a coral-reef-derived Streptomyces sp. SCSIO 66814. Their structures were determined through extensive spectroscopic analysis, chiral analysis, and single-crystal X-ray diffraction data. Compounds 2 and 3 were presumed to be intermediates for further generating homononactic acid (5) and nonactic acid, and the latter two molecules were able to act as precursors to form macrotetrolides with remarkable biological activity. The isolation of related precursors, compounds 2-5, provided more evidence to support the proposal of a plausible biosynthetic pathway for nonactic acid and its homologs. Additionally, (+)-1 exhibited a weak activity against DPPH radicals.


Asunto(s)
Antozoos , Cromonas , Streptomyces , Streptomyces/metabolismo , Streptomyces/química , Cromonas/química , Cromonas/aislamiento & purificación , Cromonas/farmacología , Estereoisomerismo , Antozoos/química , Animales , Cristalografía por Rayos X , Ácidos Grasos/química , Ácidos Grasos/aislamiento & purificación , Productos Biológicos/química , Productos Biológicos/farmacología , Productos Biológicos/aislamiento & purificación , Estructura Molecular
7.
Fitoterapia ; 175: 105905, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38479616

RESUMEN

Six new dimeric 2-(2-phenylethyl)chromones (1-6) were successfully isolated from the ethanol extract of agarwood of Aquilaria filaria from Philippines under HPLC-MS guidance. Compounds 1-6 are all dimers formed by linking 5,6,7,8-tetrahydro-2-(2-phenylethyl)chromone and flindersia 2-(2-phenylethyl)chromone via a single ether bond, and the linkage site (C5-O-C8'') of compound 2 is extremely rare. A variety of spectroscopic methods were used to ascertain their structures, including extensive 1D and 2D NMR spectroscopic analysis, HRESIMS, and comparison with literature. The in vitro tyrosinase inhibitory and anti-inflammatory activities of each isolate were assessed. Among these compounds, compound 2 had a tyrosinase inhibition effect with an IC50 value of 27.71 ± 2.60 µM, and compound 4 exhibited moderate inhibition of nitric oxide production in lipopolysaccharide-stimulated RAW264.7 cells with an IC50 value of 35.40 ± 1.04 µM.


Asunto(s)
Antiinflamatorios , Monofenol Monooxigenasa , Óxido Nítrico , Thymelaeaceae , Madera , Células RAW 264.7 , Animales , Thymelaeaceae/química , Ratones , Estructura Molecular , Madera/química , Óxido Nítrico/metabolismo , Antiinflamatorios/farmacología , Antiinflamatorios/aislamiento & purificación , Antiinflamatorios/química , Monofenol Monooxigenasa/antagonistas & inhibidores , Filipinas , Cromonas/aislamiento & purificación , Cromonas/farmacología , Cromonas/química , Fitoquímicos/farmacología , Fitoquímicos/aislamiento & purificación , Flavonoides
8.
J Antibiot (Tokyo) ; 77(6): 389-392, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38519549

RESUMEN

Okichromanone (1), a new chromanone, was isolated from the culture extract of a sponge-derived actinomycete Microbispora, along with known 1-hydroxyphenazine (2). Compound 1 was elucidated to exist as a mixture of two isomeric structures (1a and 1b) at a ratio of nearly 3:2. Compounds 1 and 2 showed anti HSV-I activity with IC50 values 40 and 86 µM, respectively, and anti HSV-II activity with IC50 values 59 and 123 µM, respectively.


Asunto(s)
Actinobacteria , Antivirales , Cromonas , Poríferos , Animales , Actinobacteria/química , Antivirales/farmacología , Antivirales/aislamiento & purificación , Antivirales/química , Chlorocebus aethiops , Cromonas/farmacología , Cromonas/química , Cromonas/aislamiento & purificación , Herpesvirus Humano 1/efectos de los fármacos , Concentración 50 Inhibidora , Estructura Molecular , Poríferos/química , Células Vero
9.
Mar Drugs ; 20(3)2022 Feb 24.
Artículo en Inglés | MEDLINE | ID: mdl-35323461

RESUMEN

In this study, a detailed chemical investigation of a streptomycin-resistant strain of the deep-sea marine, actinomycete Amycolatopsis sp. WP1, yielded six novel amycolachromones A-F (1-6), together with five known analogues (7-11). Amycolachromones A-B (1-2) possessed unique dimer skeletons. The structures and relative configurations of compounds 1-11 were elucidated by extensive spectroscopic data analyses combined with X-ray crystal diffraction analysis. Plausible biogenetic pathways of amycolachromones A-F were also proposed.


Asunto(s)
Amycolatopsis/química , Cromonas/aislamiento & purificación , Amycolatopsis/metabolismo , Antibacterianos , Organismos Acuáticos/química , Cromonas/química , Cromonas/metabolismo , Farmacorresistencia Bacteriana , Estructura Molecular , Estreptomicina
10.
Mar Drugs ; 20(3)2022 Feb 28.
Artículo en Inglés | MEDLINE | ID: mdl-35323478

RESUMEN

Several natural products recovered from a marine-derived Aspergillus niger were tested for their inhibitory activity against SARS CoV-2 in vitro. Aurasperone A (3) was found to inhibit SARS CoV-2 efficiently (IC50 = 12.25 µM) with comparable activity with the positive control remdesivir (IC50 = 10.11 µM). Aurasperone A exerted minimal cytotoxicity on Vero E6 cells (CC50 = 32.36 mM, SI = 2641.5) and it was found to be much safer than remdesivir (CC50 = 415.22 µM, SI = 41.07). To putatively highlight its molecular target, aurasperone A was subjected to molecular docking against several key-viral protein targets followed by a series of molecular dynamics-based in silico experiments that suggested Mpro to be its primary viral protein target. More potent anti-SARS CoV-2 Mpro inhibitors can be developed according to our findings presented in the present investigation.


Asunto(s)
Antivirales/farmacología , Cromonas/farmacología , Proteasas 3C de Coronavirus/antagonistas & inhibidores , Inhibidores de Proteasas/farmacología , SARS-CoV-2/efectos de los fármacos , Adenosina Monofosfato/análogos & derivados , Adenosina Monofosfato/farmacología , Alanina/análogos & derivados , Alanina/farmacología , Animales , Antivirales/aislamiento & purificación , Aspergillus niger/química , Chlorocebus aethiops , Cromonas/aislamiento & purificación , Proteasas 3C de Coronavirus/metabolismo , Proteasas Similares a la Papaína de Coronavirus/metabolismo , ARN Polimerasa Dependiente de ARN de Coronavirus/metabolismo , Simulación del Acoplamiento Molecular , Inhibidores de Proteasas/aislamiento & purificación , ARN Helicasas/metabolismo , Glicoproteína de la Espiga del Coronavirus/metabolismo , Células Vero
11.
Int J Mol Sci ; 23(2)2022 Jan 11.
Artículo en Inglés | MEDLINE | ID: mdl-35054969

RESUMEN

Microbial co-cultivation is a promising approach for the activation of biosynthetic gene clusters (BGCs) that remain transcriptionally silent under artificial culture conditions. As part of our project aiming at the discovery of marine-derived fungal agrochemicals, we previously used four phytopathogens as model competitors in the co-cultivation of 21 marine fungal strains. Based on comparative untargeted metabolomics analyses and anti-phytopathogenic activities of the co-cultures, we selected the co-culture of marine Cosmospora sp. with the phytopathogen Magnaporthe oryzae for in-depth chemical studies. UPLC-MS/MS-based molecular networking (MN) of the co-culture extract revealed an enhanced diversity of compounds in several molecular families, including isochromanones, specifically induced in the co-culture. Large scale co-cultivation of Cosmospora sp. and M. oryzae resulted in the isolation of five isochromanones from the whole co-culture extract, namely the known soudanones A, E, D (1-3) and their two new derivatives, soudanones H-I (4-5), the known isochromans, pseudoanguillosporins A and B (6, 7), naphtho-γ-pyrones, cephalochromin and ustilaginoidin G (8, 9), and ergosterol (10). Their structures were established by NMR, HR-ESIMS, FT-IR, electronic circular dichroism (ECD) spectroscopy, polarimetry ([α]D), and Mosher's ester reaction. Bioactivity assays revealed antimicrobial activity of compounds 2 and 3 against the phytopathogens M. oryzae and Phytophthora infestans, while pseudoanguillosporin A (6) showed the broadest and strongest anti-phytopathogenic activity against Pseudomonas syringae, Xanthomonas campestris, M. oryzae and P. infestans. This is the first study assessing the anti-phytopathogenic activities of soudanones.


Asunto(s)
Ascomicetos/metabolismo , Cromonas/química , Cromonas/metabolismo , Interacciones Microbianas , Ascomicetos/genética , Cromatografía Liquida , Cromonas/aislamiento & purificación , Técnicas de Cocultivo , Metaboloma , Metabolómica/métodos , Estructura Molecular , Análisis Espectral , Espectrometría de Masas en Tándem
12.
Anticancer Agents Med Chem ; 22(2): 362-370, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-33719978

RESUMEN

BACKGROUND: Marine actinomycetes are among indispensable sources of natural bioactive compounds with unique antimicrobial and anti-cancer activities. OBJECTIVE: Herein, it was aimed to elucidate the bioactive potential of a marine-derived Streptomyces ovatisporus S4702T, isolated previously. METHODS: Streptomyces ovatisporus S4702T was cultured in N-Z Amine broth, and extraction was carried out using different organic solvents. Bioassay-guided purification was followed by chemical characterization using NMR and LC-MS/MS. The compound was then evaluated for its antibacterial, antioxidant and cytotoxic activities. RESULTS: Etyl acetate extracts gave the highest antibacterial activity, and chemical characterization of this extract indicated the formula as C15H29O5N3 and the corresponding possible molecular structure as 4H-chromen-4-one derivative. It was found highly potent against Bacillus subtilis ATCC 6633 (MIC: 0.25 µg ml-1) and Micrococcus luteus ATCC 9341 (MBC: 0.5 µg ml-1). It has no remarkable antioxidant activity, but a higher EC50 value and less cytotoxicity against normal cells. The EC50 values of this chromen derivative were found as 9.68 µg ml-1 for human colon carcinoma, 9.93 µg ml-1 for human prostate adenocarcinoma and 25.5 µg ml-1 for human embryonic kidney cells. CONCLUSION: Overall, the presented 4H-chromen-4-one derivative is a remarkable bioactive compound with potent antibacterial and cytotoxic activity. With its high bioactive potential, it is proposed as a good candidate in medicine.


Asunto(s)
Antibacterianos/farmacología , Antineoplásicos/farmacología , Antioxidantes/farmacología , Cromonas/farmacología , Streptomyces/química , Antibacterianos/química , Antibacterianos/aislamiento & purificación , Antineoplásicos/química , Antineoplásicos/aislamiento & purificación , Antioxidantes/química , Antioxidantes/aislamiento & purificación , Apoptosis/efectos de los fármacos , Benzotiazoles/antagonistas & inhibidores , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Células Cultivadas , Cromonas/química , Cromonas/aislamiento & purificación , Relación Dosis-Respuesta a Droga , Ensayos de Selección de Medicamentos Antitumorales , Bacterias Gramnegativas/efectos de los fármacos , Bacterias Grampositivas/efectos de los fármacos , Humanos , Pruebas de Sensibilidad Microbiana , Estructura Molecular , Fenetilaminas/antagonistas & inhibidores , Relación Estructura-Actividad , Ácidos Sulfónicos/antagonistas & inhibidores
13.
Chem Biodivers ; 18(10): e2100237, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34397144

RESUMEN

Rehmanniae Radix Praeparata is the processed products of the root of Rehmannia glutinosa. It has been used as a Traditional Chinese Medicine for thousands of years, and it has been found to possess widely pharmacological activities. In this study, three new 2,2'-difurylketone derivatives (rehmanniaeketone A-C) and two new chromones [3,8-dihydroxy-2-(2-hydroxyethyl)chromone and 3,8-dihydroxy-2-[(2-O-α-D-galactopyranosyloxy)ethyl]chromone] were isolated from the Rehmanniae Radix Praeparata. Furthermore all of the compounds were subjected to cytotoxic testing against the human lung carcinoma A549 cells. The cytotoxic results showed that rehmanniaeketone B and rehmanniaeketone C exhibited more stronger inhibition effects on the cell activity of A549 cells with the IC50 5.23 µM and 2.05 µM than other compounds. And 3,8-dihydroxy-2-(2-hydroxyethyl)chromone exhibited moderately inhibitory activity with the IC50 61 µM. Rehmanniaeketone A and 3,8-dihydroxy-2-[(2-O-α-D-galactopyranosyloxy]chromone showed no inhibitory effects.


Asunto(s)
Antineoplásicos Fitogénicos/farmacología , Cromonas/farmacología , Medicamentos Herbarios Chinos/farmacología , Cetonas/farmacología , Rehmannia/química , Células A549 , Antineoplásicos Fitogénicos/química , Antineoplásicos Fitogénicos/aislamiento & purificación , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Cromonas/química , Cromonas/aislamiento & purificación , Relación Dosis-Respuesta a Droga , Ensayos de Selección de Medicamentos Antitumorales , Medicamentos Herbarios Chinos/química , Medicamentos Herbarios Chinos/aislamiento & purificación , Humanos , Cetonas/química , Cetonas/aislamiento & purificación , Medicina Tradicional China , Estructura Molecular , Células Tumorales Cultivadas
14.
Fitoterapia ; 154: 105004, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34339802

RESUMEN

Chemical investigation for the secondary metabolite of marine-derived fungus Aspergillus sp. LS57 resulted in the isolation of one new chromone named aspergilluone A (1) containing a chromone skeleton fused with an unusual hydrogenation cyclopentanoid ring, along with three known compounds 2-4. The structure of 1 was elucidated by 1D and 2D nuclear magnetic resonance (NMR) spectroscopic and mass spectrometric analyses. Its absolute configuration was established by combining NMR quantum chemical calculations and comparison between the experimental and calculated circular dichroism (CD) curves. Additionally, the antibacterial assay of compound 1 was performed. As a result, compound 1 showed in vitro anti-Mycobacterium tuberculosis with MIC value of 32 µg/mL, together with moderate antibacterial activity against Staphylococcus aureus (MIC values = 64 µg/mL), and exhibited feeble activity against gram-positive Bacillus subtilis and gram-negative pathogen Escherichia coli (both MICs = 128 µg/mL).


Asunto(s)
Antibacterianos/farmacología , Aspergillus/química , Cromonas/farmacología , Poríferos/microbiología , Animales , Antibacterianos/aislamiento & purificación , China , Cromonas/aislamiento & purificación , Pruebas de Sensibilidad Microbiana , Estructura Molecular
15.
Mar Drugs ; 19(6)2021 Jun 19.
Artículo en Inglés | MEDLINE | ID: mdl-34205300

RESUMEN

Four new chromones, phomochromenones D-G (1-4), along with four known analogues, diaporchromone A (5), diaporchromanone C (6), diaporchromanone D (7), and phomochromenone C (8), were isolated from the culture of Phomopsis asparagi DHS-48 from Chinese mangrove Rhizophora mangle. Their structures were elucidated on the basis of comprehensive spectroscopic analysis. The absolute configurations of 1 and 4 were assigned on the basis of experimental and calculated electronic circular dichroism (ECD) data, and those of enantiomers 2 and 3 were determined by a modified Mosher's method and basic hydrolysis. To the best of our knowledge, phomochromenones D-F (1-4) possessing a 3-substituted-chroman-4-one skeleton are rarely found in natural sources. Diaporchromone A (5) showed moderate to weak immunosuppressive activity against T and/or B lymphocyte cells with IC50 of 34 µM and 117 µM.


Asunto(s)
Productos Biológicos , Cromonas , Inmunosupresores , Phomopsis/química , Rhizophoraceae/microbiología , Animales , Linfocitos B/efectos de los fármacos , Productos Biológicos/química , Productos Biológicos/aislamiento & purificación , Productos Biológicos/farmacología , Cromonas/química , Cromonas/aislamiento & purificación , Cromonas/farmacología , Femenino , Inmunosupresores/química , Inmunosupresores/aislamiento & purificación , Inmunosupresores/farmacología , Ratones , Ratones Endogámicos BALB C , Linfocitos T/efectos de los fármacos
16.
J Sep Sci ; 44(17): 3287-3294, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34240798

RESUMEN

Prim-O-glucosylcimifugin, cimifugin, and 5-O-methylvisamminoside are three major chromone derivatives of Saposhnikovia divaricata that have many pharmacological activities, such as anti-inflammatory and antitumor activities. In the present work, an effective method for the simultaneous separation of prim-O-glucosylcimifugin, cimifugin, and 5-O-methylvisamminoside with high purities was established using HPD-300 resin coupled with preparative high-performance liquid chromatography. The adsorption kinetics curves of the three compounds on the HPD-300 resin were studied and found to fit well according to the pseudo-second-order equation. The adsorption isotherm results indicated that the adsorption process of the three compounds was exothermic. After a one-run treatment with the resin, the contents of prim-O-glucosylcimifugin, cimifugin, and 5-O-methylvisamminoside increased from 0.29, 0.06, and 0.37% to 13.07, 2.83, and 16.91% with recovery yields of 76.38, 78.25, and 76.73%, respectively. Finally, the purities of the three compounds were found to reach more than 95% after further separation using preparative high-performance liquid chromatography. The method developed in this study was effective and could simultaneously separate three chromones from Saposhnikovia divaricate. The experimental results also showed that the HPD-300 resin is suitable for the separation of chromone derivatives.


Asunto(s)
Apiaceae/química , Cromonas/aislamiento & purificación , Medicamentos Herbarios Chinos/aislamiento & purificación , Monosacáridos/aislamiento & purificación , Resinas de Plantas/química , Xantenos/aislamiento & purificación , Adsorción , Cromatografía Líquida de Alta Presión , Cromonas/química , Medicamentos Herbarios Chinos/química , Cinética , Monosacáridos/química , Tamaño de la Partícula , Porosidad , Propiedades de Superficie , Xantenos/química
17.
J Microbiol Biotechnol ; 31(7): 1022-1027, 2021 Jul 28.
Artículo en Inglés | MEDLINE | ID: mdl-34099598

RESUMEN

Three compounds were isolated from marine-derived Streptomyces sp. CNQ-031, and their inhibitory activities against monoamine oxidases (MAOs), acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and ß-secretase (BACE-1) were evaluated. Compound 1 (5,7-dihydroxy-2-isopropyl-4H-chromen-4-one) was a potent and selective inhibitor of MAO-A, with a 50% inhibitory concentration (IC50) of 2.70 µM and a selectivity index (SI) of 10.0 versus MAO-B. Compound 2 [5,7-dihydroxy-2-(1-methylpropyl)-4H-chromen-4-one] was a potent and low-selective inhibitor of MAO-B, with an IC50 of 3.42 µM and an SI value of 2.02 versus MAO-A. Compound 3 (1-methoxyphenazine) did not inhibit MAO-A or MAO-B. All three compounds showed little inhibitory activity against AChE, BChE, and BACE-1. The Ki value of compound 1 for MAO-A was 0.94 ± 0.28 µM, and the Ki values of compound 2 for MAO-A and MAO-B were 3.57 ± 0.60 and 1.89 ± 0.014 µM, respectively, with competitive inhibition. The 1-methylpropyl group in compound 2 increased the MAO-B inhibitory activity compared with the isopropyl group in compound 1. Inhibition of MAO-A and MAO-B by compounds 1 and 2 was recovered by dialysis experiments. These results suggest that compounds 1 and 2 are reversible, competitive inhibitors of MAOs and can be considered potential therapies for neurological disorders such as depression and Alzheimer's disease.


Asunto(s)
Cromonas/metabolismo , Inhibidores de la Monoaminooxidasa/metabolismo , Streptomyces/metabolismo , Animales , Cromonas/química , Cromonas/aislamiento & purificación , Sedimentos Geológicos/microbiología , Humanos , Concentración 50 Inhibidora , Cinética , Estructura Molecular , Inhibidores de la Monoaminooxidasa/química , Inhibidores de la Monoaminooxidasa/aislamiento & purificación , Agua de Mar/microbiología , Streptomyces/clasificación , Streptomyces/genética , Streptomyces/aislamiento & purificación
18.
Bioorg Chem ; 112: 104927, 2021 07.
Artículo en Inglés | MEDLINE | ID: mdl-33932772

RESUMEN

Four new chromene derivatives, pestalotiochromenoic acids A - D (1, 2, 4, and 5), and two new chromone derivatives, pestalotiochromones A and B (6 and 7), were obtained from the marine alga-derived fungus Pestalotiopsis neglecta SCSIO41403, as well as a reported derivate named piperochromenoic acid (3) with its configuration determined for the first time. Their structures were determined by detailed nuclear magnetic resonance (NMR) and mass spectroscopic analyses, while the absolute configurations were established by theoretical NMR and electronic circular dichroism (ECD) calculation, including Mo2(OAc)4-induced ECD experiments. Those chromene and chromone derivatives displayed weak cytotoxicity, but showed obvious liver X receptors (LXRs) modulatory activities, by in vitro tests on the expression of LXRα, LXRß and theirtarget gene ABCA1, as well as in silico docking analysis. Moreover, the high binding affinities between pestalotiochromone A (6) and LXRα, revealed by surface plasmon resonance (SPR) with the dissociation equilibrium constant (KD) value of 6.2 µM, demonstrated 6 could act as a new potential LXR agonist.


Asunto(s)
Cromonas/farmacología , Receptores X del Hígado/metabolismo , Neglecta/química , Línea Celular Tumoral , Supervivencia Celular/efectos de los fármacos , Cromonas/química , Cromonas/aislamiento & purificación , Relación Dosis-Respuesta a Droga , Humanos , Receptores X del Hígado/genética , Estructura Molecular , Relación Estructura-Actividad
19.
Bioorg Chem ; 113: 104996, 2021 08.
Artículo en Inglés | MEDLINE | ID: mdl-34038794

RESUMEN

Ficus altissima, an evergreen arbor belonging to the Moraceae family, is mainly cultivated in the tropics and subtropics of South and Southeast Asia with the characteristic of exuberant vitality and luxuriant foliage. In this article, four new prenylated isoflavones (1-4), along with ten previously described isoflavones (5-14) and two known prenylated coumaronochromones (15 and 16) were firstly obtained from the fruits of F. altissima. Their structures were identified by various spectroscopic techniques including specific optical rotation, HR-ESI-MS and NMR. The isolated products were evaluated for their anti-proliferative activities against three human tumor cell lines (HepG2, MCF-7 and MDA-MB-231) through MTT assay. Compounds 2, 3 and 16 exhibited obvious anti-proliferative activities against MDA-MB-231 cell line and compounds 3, 13 and 16 showed effective cytotoxic effects on HepG2 cell line in a concentration-dependent manner, as verified by the colony formation assay, cell and nucleus morphological assessment and apoptosis assay. Meanwhile, compounds 5 and 12 exhibited significant inhibition activities on NO production in LPS-stimulated RAW 264.7 cell line compared with positive control indometacin. The phytochemical investigation of the fruits of F. altissima in this study could provide the evidence for the discovery of lead compounds.


Asunto(s)
Antiinflamatorios no Esteroideos/farmacología , Antineoplásicos Fitogénicos/farmacología , Cromonas/farmacología , Cumarinas/farmacología , Ficus/química , Frutas/química , Isoflavonas/farmacología , Animales , Antiinflamatorios no Esteroideos/química , Antiinflamatorios no Esteroideos/aislamiento & purificación , Antineoplásicos Fitogénicos/química , Antineoplásicos Fitogénicos/aislamiento & purificación , Apoptosis/efectos de los fármacos , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Cromonas/química , Cromonas/aislamiento & purificación , Cumarinas/química , Cumarinas/aislamiento & purificación , Relación Dosis-Respuesta a Droga , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Isoflavonas/química , Isoflavonas/aislamiento & purificación , Lipopolisacáridos/antagonistas & inhibidores , Lipopolisacáridos/farmacología , Ratones , Estructura Molecular , Óxido Nítrico/antagonistas & inhibidores , Óxido Nítrico/biosíntesis , Células RAW 264.7 , Relación Estructura-Actividad
20.
Bioorg Chem ; 110: 104829, 2021 05.
Artículo en Inglés | MEDLINE | ID: mdl-33773222

RESUMEN

Rohitukine (RH) was extracted from the stem bark of Dysoxylum binectariferum Hook. It was derivatized to different arylsulphanmides by treating with the corresponding aryl sulphonyl chlorides. These derivatives were tested in-vitro on protein tyrosine phosphatase 1B (PTP1B) inhibition. Among these the active compounds K2, K3, K5, and K8 significantly inhibited the PTP1B by 51.3%, 65.6%, 71.9%, and 55.9% respectively at 10 µg/ml, the results were also supported by in-silico docking experiments. The most potent compound K5 was analyzed for antidiabetic and antidyslipidemic activity in vivo. It showed a marked reduction in blood glucose level (random and fasting) and serum insulin level in db/db mice. It improved glucose intolerance as ascertained by the oral glucose tolerance test (OGTT). These NCEs (New Chemical Entities) also lowered cholesterol and triglyceride profiles while improved high-density lipoprotein cholesterol in db/db mice. The K5 was further evaluated for antiadipogenic activity on MDI (Methylisobutylxanthine, dexamethasone, and insulin)-induced adipogenesis. where it significantly inhibited MDI-induced adipogenesis in 3 T3-L1 preadipocytes, at 10 µM and 20 µM concentration. These results were compared with the parent compound RH which inhibited 35% and 45% lipid accumulation while the RH analog K5 inhibited the lipid accumulation by 41% and 51% at 10 and 20 µM concentration, respectively. These results well corroborated with in-silico studies.


Asunto(s)
Cromonas/farmacología , Inhibidores Enzimáticos/farmacología , Piperidinas/farmacología , Proteína Tirosina Fosfatasa no Receptora Tipo 1/antagonistas & inhibidores , Células 3T3-L1 , Animales , Diferenciación Celular/efectos de los fármacos , Células Cultivadas , Cromonas/química , Cromonas/aislamiento & purificación , Relación Dosis-Respuesta a Droga , Inhibidores Enzimáticos/química , Inhibidores Enzimáticos/aislamiento & purificación , Masculino , Meliaceae/química , Ratones , Estructura Molecular , Piperidinas/química , Piperidinas/aislamiento & purificación , Proteína Tirosina Fosfatasa no Receptora Tipo 1/metabolismo , Relación Estructura-Actividad
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