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1.
J Nat Prod ; 87(6): 1611-1617, 2024 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-38805684

RESUMO

The first phytochemical investigation of the twig extract of Uvaria leptopoda resulted in the isolation and identification of three new tetrahydroxanthene-1,3(2H)-diones, uvarialeptones A-C, two new oxidized hexadiene derivatives, uvarialeptols A and B, together with ten known compounds. Their structures were elucidated by spectroscopic techniques and mass spectrometry. Uvarialeptones A and B were unprecedented tetrahydroxanthene-1,3(2H)-dione dimers which exhibited a cyclobutane ring via [2 + 2] cycloaddition from uvarialeptone C and 9a-O-methyloxymitrone, respectively. The structure of uvarialeptone A was confirmed by X-ray diffraction analysis using Mo Kα radiation. Compound 3 inhibited NO production at an IC50 value of 6.7 ± 0.1 µM.


Assuntos
Uvaria , Uvaria/química , Estrutura Molecular , Animais , Óxido Nítrico/biossíntese , Camundongos , Xantenos/farmacologia , Xantenos/química , Cristalografia por Raios X , Oxirredução , Células RAW 264.7
2.
J Nat Prod ; 87(2): 207-216, 2024 02 23.
Artigo em Inglês | MEDLINE | ID: mdl-38237151

RESUMO

Four new adjacent bis-tetrahydrofuran acetogenins, bullacin C (7), uvarirufin (9), and uvariasolins III (12) and IV (13), along with 11 known acetogenins, were isolated from the stem of Uvaria rufa. Their structures were elucidated based on spectroscopic data analysis, including 1D and 2D NMR, HRESIMS, and MALDI-MS/MS of the lithium adducts. Absolute configurations were assigned using Mosher ester analysis and ECD measurements. Uvarirufin (9) possesses a unique C-39 skeleton among acetogenins. Most tested acetogenins exhibited cytotoxicity against human cancer cell lines (HCT 116, 22Rv1, MDA-MB-435, OVCAR3). Squamocin (8) and uvarirufin (9) were found to be the most potent, with an IC50 value of 1.2 µM for both in HCT 116 colon cancer cells. Additionally, a new application of Dragendorff's reagent is proposed herein for the TLC detection of acetogenins.


Assuntos
Antineoplásicos , Neoplasias Ovarianas , Uvaria , Feminino , Humanos , Acetogeninas/farmacologia , Acetogeninas/química , Apoptose , Linhagem Celular Tumoral , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Espectrometria de Massas em Tandem , Uvaria/química
3.
Chem Biodivers ; 21(4): e202400319, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38423999

RESUMO

A new oxidized heptene, 7-benzoyloxy-4-hydroxy-1-ethoxy-2E,4Z-heptadiene-1,6-dione, namely siamheptene A (1), together with eight known compounds (2-9), were isolated from the leaves of Uvaria siamensis. Their structures were elucidated by detailed analysis of spectroscopic (IR, 1D and 2D NMR) and mass spectrometric data. Compound 9 is reported for the first time from Uvaria genus. Siamheptene A was evaluated for cytotoxicity against HeLa (cervical cancer cells), A549 (lung cancer cells), and Vero cells using the MTT assay and screened for antibacterial activities. In addition, the isolated compounds (1-7, and 9) were investigated for their antioxidant (DPPH, FRAP and ABTS+ assays), anti-glycation, and anti-tyrosinase properties. Based on our results, compound 1 had mild cytotoxicity against Hela and A549 cancer cell lines, with IC50 ranging from 31.09 to 31.67 µg/mL. Compound 1 also showed antioxidant activities in all tasted assays. However, it showed no detectable activity (>128 µg/mL) against various bacterial strains, and it has no inhibitory effects on tyrosinase enzymes. Among of all tested compounds, chrysin (5), showcased highest anti-glycation and anti-tyrosinase activities. This comprehensive analysis provides highlighting the potential of 1 as a lead compound for further structural modification and development of cytotoxic or antioxidant agents.


Assuntos
Antineoplásicos , Uvaria , Animais , Chlorocebus aethiops , Humanos , Monofenol Mono-Oxigenase , Uvaria/química , Antioxidantes/farmacologia , Antioxidantes/química , Células Vero , Antineoplásicos/farmacologia , Extratos Vegetais/química
4.
Chem Biodivers ; 20(9): e202300652, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37531297

RESUMO

The leaf oil compositions of two Lauraceae and one Annonaceae plants cultivated in Vietnam were analysed by GC/MS (gas chromatography-mass spectrometry) analysis. The leaf oil of the first Lauraceae plant Cinnamomum melastomaceum contained 34 identified compounds, in which benzyl benzoate (38.5 %), linalool (19.9 %), (E)-caryophyllene (10.5 %), and α-terpineol (6.9 %) were the major compounds. The leaves of the second Lauraceae plant Neolitsea buisanensis gave an oil with the main compounds (E)-ß-ocimene (24.0 %), benzyl benzoate (15.8 %), bicyclogermacrene (14.9 %), and (E)-caryophyllene (6.3 %). The leaf oil of the Annonaceae plant Uvaria microcarpa consisted of the principal compounds (E)-caryophyllene (18.0 %), bicyclogermacrene (8.1 %), and δ-elemene (6.1 %). Two Lauraceae oil samples exhibited strong mosquito larvicidal activity against Aedes aegypti, Ae. albopictus, and Culex quinquefasciatus with LC50 and LD90 values of less than 50 µg/mL. The Annonaceae oil sample showed strong antimicrobial activity against the fungus Aspergillus niger ATCC 1015 with the MIC (minimum inhibitory concentration) value of 32 µg/mL. In the docking approach, the major compounds (E)-caryophyllene, bicyclogermacrene, and benzyl benzoate interacted with the mosquito odorant-binding protein 3OGN, whereas (E)-caryophyllene, bicyclogermacrene, and δ-elemene also potentially interacted with the 4ZA5 protein of fungus A. niger.


Assuntos
Aedes , Anti-Infecciosos , Cinnamomum , Inseticidas , Lauraceae , Óleos Voláteis , Uvaria , Animais , Óleos Voláteis/química , Simulação de Acoplamento Molecular , Vietnã , Anti-Infecciosos/farmacologia , Anti-Infecciosos/análise , Inseticidas/química , Larva , Folhas de Planta/química
5.
J Nat Prod ; 84(12): 3080-3089, 2021 12 24.
Artigo em Inglês | MEDLINE | ID: mdl-34802242

RESUMO

Five new cyclohexene derivatives, dipandensin A and B (1 and 2) and pandensenols A-C (3-5), and 16 known secondary metabolites (6-21) were isolated from the methanol-soluble extracts of the stem and root barks of Uvaria pandensis. The structures were characterized by NMR spectroscopic and mass spectrometric analyses, and that of 6-methoxyzeylenol (6) was further confirmed by single-crystal X-ray crystallography, which also established its absolute configuration. The isolated metabolites were evaluated for antibacterial activity against the Gram-positive bacteria Bacillus subtilis and Staphylococcus epidermidis and the Gram-negative bacteria Enterococcus raffinosus, Escherichia coli, Paraburkholderia caledonica, Pectobacterium carotovorum, and Pseudomonas putida, as well as for cytotoxicity against the MCF-7 human breast cancer cell line. A mixture of uvaretin (20) and isouvaretin (21) exhibited significant antibacterial activity against B. subtilis (EC50 8.7 µM) and S. epidermidis (IC50 7.9 µM). (8'α,9'ß-Dihydroxy)-3-farnesylindole (12) showed strong inhibitory activity (EC50 9.8 µM) against B. subtilis, comparable to the clinical reference ampicillin (EC50 17.9 µM). None of the compounds showed relevant cytotoxicity against the MCF-7 human breast cancer cell line.


Assuntos
Cicloexenos/química , Oxigênio/química , Extratos Vegetais/farmacologia , Raízes de Plantas/química , Caules de Planta/química , Uvaria/química , Cristalografia por Raios X/métodos , Cicloexenos/farmacologia , Bactérias Gram-Negativas/efeitos dos fármacos , Bactérias Gram-Positivas/efeitos dos fármacos , Humanos , Células MCF-7 , Testes de Sensibilidade Microbiana , Extratos Vegetais/química
6.
Bioorg Chem ; 116: 105333, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34537516

RESUMO

Natural products--polyoxygenated cyclohexenes exhibited potent anti-tumor activity, such as zeylenone, which is a natural product isolated from Uvaria grandiflora Roxb. This article will attempt to establish a gram-scale synthesis method of (+)-zeylenone and explain the structure-activity relationship of this kind of compound. Total synthesis of (+)-zeylenone was completed in 13 steps with quinic acid as the starting material in 9.8% overall yield. The highlight of the route was the control of the three carbon's chirality by single step dihydroxylation. In addition, different kinds of derivatives were designed and synthesized. Cell Counting Kit-8 (CCK8) assay was used for evaluating antitumor activity against three human cancer cell lines. The structure--activity relationship suggested that compounds with both absolute configurations exhibited tumor-suppressive effects. Moreover, hydroxyls at the C-1/C-2 position were crucial to the activity, and the esterification of large groups at C-1 hydroxyl eliminated the activity. Hydroxyl at the C-3 position was also important as proper ester substituent could increase the potency.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Cicloexanos/farmacologia , Dioxanos/farmacologia , Uvaria/química , Animais , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/isolamento & purificação , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Cicloexanos/química , Cicloexanos/isolamento & purificação , Dioxanos/química , Dioxanos/isolamento & purificação , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Camundongos , Estrutura Molecular , Estereoisomerismo , Relação Estrutura-Atividade , Células Tumorais Cultivadas
7.
BMC Vet Res ; 16(1): 49, 2020 Feb 10.
Artigo em Inglês | MEDLINE | ID: mdl-32041607

RESUMO

BACKGROUND: Uvaria chamae (Annonaceae), Phyllantus amarus (Phyllantaceae) and Lantana camara (Verbenaceae) are empirically alleged to be used as Beninese medicinal plants in the treatment of salmonellosis. This study aimed to produce scientific data on in vitro and in vivo efficacy of Uvaria chamae, Lantana camara and Phyllantus amarus on multiresistant Salmonella spp isolated in Benin. RESULTS: After performing in vitro tests on aqueous and ethanolic extracts of these plants, only the aqueous extract of Uvaria chamae (leaves) showed the best anti-Salmonella's activity and was used for this in vivo experiment. The induction of salmonellosis revealed 9 × 108 CFU/ml was the optimal concentration triggering and maintaining symptoms in chicks. This infective concentration was used for in vivo assessment. Twenty-four hours post inoculation, the symptoms of salmonellosis (wet cloaca, diarrhea stools and somnolence) were observed in infected groups. After 7 days of treatment, the reduction of bacterial load at 100 mg/L, 200 mg/L, 400 mg/L of the extract was respectively 85%, 52.38% and 98% for Uvaria chamae, Phyllantus amarus and Lantana camara in the chick's groups infected with Salmonella Typhimurium ATCC 14028. On the other hand, colistin completely cancelled the bacterial load (reduction rate of 100%). With the groups infected with Salmonella spp (virulent strain), the reduction rate of bacterial load at 100 mg/L, 200 mg/L, 400 mg/L of extract was 0%, 98.66%, and 99.33%. The extracts at 200 and 400 mg/L were more active than colistin, which reduced the bacterial load by 33.33%. The toxicity tests did not show any negative effect of Colistin and the Uvaria chamae's extract on the biochemical and hematological parameters of the chicks. CONCLUSION: The aqueous extract of Uvaria chamae is active in vitro and in vivo on multiresistant strains of Salmonella enterica. This plant is a good candidate for the development of an improved traditional medicine for the management of salmonellosis.


Assuntos
Lantana/química , Malpighiales/química , Extratos Vegetais/farmacologia , Doenças das Aves Domésticas/tratamento farmacológico , Salmonella/efeitos dos fármacos , Uvaria/química , Animais , Benin , Galinhas , Extratos Vegetais/química , Plantas Medicinais , Doenças das Aves Domésticas/microbiologia , Salmonelose Animal/tratamento farmacológico , Salmonelose Animal/microbiologia
8.
Inflammopharmacology ; 28(5): 1195-1218, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32617790

RESUMO

The therapeutic efficacy of the contemporary anti-inflammatory drugs are well established; however, prolonged use of such can often lead to serious and life-threatening side effects. Natural product-based anti-inflammatory compounds with superior efficacy and minimum toxicity can serve as possible therapeutic alternatives in this scenario. Genus Uvaria is a part of Annonaceae family, while the majority of its species are widely distributed in tropical rain forest regions of South East Asia. Uvaria species have been used extensively used as traditional medicine for treating all sorts of inflammatory diseases including catarrhal inflammation, rheumatism, acute allergic reactions, hemorrhoids, inflammatory liver disease and inflamed joints. Phytochemical analysis of Uvaria species has revealed flavones, flavonoids, tannins, saponins, polyoxygenated cyclohexene and phenolic compounds as major phyto-constituents. This review is an attempt to highlight the anti-inflammatory activity of Uvaria species by conducting a critical appraisal of the published literature. The ethnopharmacological relevance of Uvaria species in the light of toxicological studies is also discussed herein. An extensive and relevant literature on anti-inflammatory activity of Uvaria species was collected from available books, journals and electronic databases including PubMed, ScienceDirect, Scopus, Proquest and Ovid. Extracts and isolates of Uvaria species exhibited significant anti-inflammatory activity through various mechanisms of action. 6,7-di-O-Methyl-baicalein, flexuvarol B, chrysin, (-)-zeylenol, 6-hydroxy-5,7-dimethoxy-flavone, and pinocembrin were the most potent anti-inflammatory compounds with comparable IC50 with positive controls. Therefore, it is suggested that further research should be carried out to determine the pharmacokinetics, pharmacodynamics and toxicity of these therapeutically significant compounds, to convert the pre-clinical results into clinical data for drug development and design.


Assuntos
Inflamação/tratamento farmacológico , Extratos Vegetais/farmacologia , Uvaria/química , Animais , Anti-Inflamatórios/farmacologia , Humanos , Medicina Tradicional/métodos , Compostos Fitoquímicos/farmacologia , Fitoterapia/métodos
9.
J Nat Prod ; 82(1): 101-110, 2019 01 25.
Artigo em Inglês | MEDLINE | ID: mdl-30608167

RESUMO

The chemical study of leaf extracts from Uvaria cherrevensis resulted in the identification of 11 new polyoxygenated cyclohexenes, cherrevenols A-K (1-11), and a new seco-cyclohexene derivative, cherrevenol L (12). Nine known compounds (13-21) were also isolated. Three of the isolated compounds are chlorinated polyoxygenated cyclohexenes. The structures of these compounds were determined using spectroscopic methods and, in some cases (compounds 2, 6, 8, and 10), single-crystal X-ray crystallographic structural analysis or chemical correlation (compounds 6 and 7). Compounds 6 and 7 were both isolated as scalemic mixtures (ee 23-24%).


Assuntos
Cicloexenos/isolamento & purificação , Uvaria/química , Animais , Chlorocebus aethiops , Cicloexenos/química , Cicloexenos/farmacologia , Humanos , Células KB , Espectroscopia de Ressonância Magnética , Extratos Vegetais/análise , Células Vero
10.
Exp Parasitol ; 194: 67-78, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30268422

RESUMO

Treatment of drug resistant protozoa, bacteria, and viruses requires new drugs with alternative chemotypes. Such compounds could be found from Southeast Asian medicinal plants. The present study examines the cytotoxic, antileishmanial, and antiplasmodial effects of 11 ethnopharmacologically important plant species in Malaysia. Chloroform extracts were tested for their toxicity against MRC-5 cells and Leishmania donovani by MTT, and chloroquine-resistant Plasmodium falciparum K1 strain by Histidine-Rich Protein II ELISA assays. None of the extract tested was cytotoxic to MRC-5 cells. Extracts of Uvaria grandiflora, Chilocarpus costatus, Tabernaemontana peduncularis, and Leuconotis eugenifolius had good activities against L. donovani with IC50 < 50 µg/mL. Extracts of U. grandiflora, C. costatus, T. peduncularis, L. eugenifolius, A. subulatum, and C. aeruginosa had good activities against P. falciparum K1 with IC50 < 10 µg/mL. Pinoresinol isolated from C. costatus was inactive against L. donovani and P. falciparum. C. costatus extract and pinoresinol increased the sensitivity of Staphylococcus epidermidis to cefotaxime. Pinoresinol demonstrated moderate activity against influenza virus (IC50 = 30.4 ±â€¯11 µg/mL) and was active against Coxsackie virus B3 (IC50 = 7.1 ±â€¯3.0 µg/mL). ß-Amyrin from L. eugenifolius inhibited L. donovani with IC50 value of 15.4 ±â€¯0.01 µM. Furanodienone from C. aeruginosa inhibited L. donovani and P. falciparum K1 with IC50 value of 39.5 ±â€¯0.2 and 17.0 ±â€¯0.05 µM, respectively. Furanodienone also inhibited the replication of influenza and Coxsackie virus B3 with IC50 value of 4.0 ±â€¯0.5 and 7.2 ±â€¯1.4 µg/mL (Ribavirin: IC50: 15.6 ±â€¯2.0 µg/mL), respectively. Our study provides evidence that medicinal plants in Malaysia have potentials as a source of chemotypes for the development of anti-infective leads.


Assuntos
Anti-Infecciosos/farmacologia , Leishmania donovani/efeitos dos fármacos , Medicina Tradicional do Leste Asiático/métodos , Extratos Vegetais/farmacologia , Plantas Medicinais/química , Plasmodium falciparum/efeitos dos fármacos , Anti-Infecciosos/toxicidade , Apocynaceae/química , Linhagem Celular , Sinergismo Farmacológico , Enterovirus Humano B/efeitos dos fármacos , Etnofarmacologia/métodos , Furanos/química , Furanos/isolamento & purificação , Furanos/farmacologia , Furanos/toxicidade , Bactérias Gram-Negativas/efeitos dos fármacos , Bactérias Gram-Positivas/efeitos dos fármacos , Vírus da Influenza A Subtipo H1N1/efeitos dos fármacos , Concentração Inibidora 50 , Lignanas/química , Lignanas/isolamento & purificação , Lignanas/farmacologia , Lignanas/toxicidade , Malásia , Extratos Vegetais/química , Extratos Vegetais/toxicidade , Sesquiterpenos/química , Sesquiterpenos/isolamento & purificação , Sesquiterpenos/farmacologia , Sesquiterpenos/toxicidade , Tabernaemontana/química , Uvaria/química
11.
J Obstet Gynaecol Res ; 44(8): 1451-1457, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-29974554

RESUMO

AIM: Ovarian cancer is the fifth common cancer in females. The aim of our study was to determine function of Zeylenone on cell viability and apoptosis of ovarian carcinoma SKOV3 cells. METHODS: Cell viability was measured by Cell counting kit-8 (CCK8) assay; Mitochondrial membrane potential (MMP) and apoptosis were detected by flow cytometry. The mRNA and protein levels of related factors were determined by Real-time quantitative polymerase chain reaction (RT-qPCR) and Western blot, respectively. RESULTS: Cell viability was decreased by Zeylenone in a dose-dependent manner. Zeylenone with concentrations of 2.5, 5 and 10 µmol/L was used to treat ovarian carcinoma SKOV3 cells for 24 h in the following study. The loss of MMP and apoptosis were both significantly increased by Zeylenone. The mRNA and protein levels of cytochrome c (cyto c) and apoptosis inducing factor (AIF) in cytosol were increased by Zeylenone. The mRNA and protein levels of Caspase-3, Fas, Fasl and Bax were increased; while the expression of Bcl-2 was decreased by Zeylenone. The expression of (Janus family of tyrosine kinase) p-JAK and signal transducer and activator of transcription (p-STAT) was decreased significantly by Zeylenone. CONCLUSION: Zeylenone inhibited cell proliferation and promoted apoptosis in ovarian carcinoma cells. The JAK-STAT pathway was involved in this progress.


Assuntos
Apoptose/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Cicloexanos/farmacologia , Dioxanos/farmacologia , Janus Quinase 2/efeitos dos fármacos , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Neoplasias Ovarianas/tratamento farmacológico , Extratos Vegetais/farmacologia , Fator de Transcrição STAT3/efeitos dos fármacos , Transdução de Sinais/efeitos dos fármacos , Uvaria , Linhagem Celular Tumoral/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Feminino , Humanos
12.
Drug Chem Toxicol ; 41(2): 232-237, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28854821

RESUMO

The toxicity profile of medicinal plants is an important preclinical requirement in the development of phytomedicines. The cytotoxic and genotoxic effects of the leaf of Uvaria chamae P. Beauv (Annonaceae) and stem bark of Morinda lucida Benth (Rubiaceae) were investigated in order to provide information on their safety as antimalarial plants. The methanol extract of U. chamae and ethanol (70%) extract of M. lucida were separately orally administered (125, 250, and 750 mg/kg/day) to mice for 10 consecutive days. Cyclophosphamide (50 mg/kg, single dose) and distilled water were used as positive and negative controls, respectively. The mice were injected with colchicine (0.04%) intra-peritoneally 24 h after the last administration of the extracts and the bone marrows harvested. Giemsa-stained slides of bone marrow cells were microscopically assessed for dividing cells to determine the mitotic index (MI) and scored for chromosomal aberrations (CA) according to standard methods. chamae exhibited dose-dependent cytotoxicity. At 750 mg/kg, the MI was significantly (p < 0.05) lower (1.81 ± 0.04) than that of cyclophosphamide (5.83 ± 0.04). The lower the MI, the higher the cytotoxicity. The activity of M. lucida was not significantly different (p > 0.05) from that of the negative control. The total CA observed from treatment with both plants at all doses were significantly (p < 0.05) greater than that of control. This study concluded that U. chamae showed both cytotoxicity and genotoxicity while M. lucida exerted only genotoxic effect. Nevertheless, the two plants should be used with caution in antimalarial therapy.


Assuntos
Antimaláricos/toxicidade , Células da Medula Óssea/efeitos dos fármacos , Aberrações Cromossômicas/induzido quimicamente , Morinda/toxicidade , Extratos Vegetais/toxicidade , Uvaria/toxicidade , Animais , Antimaláricos/isolamento & purificação , Células da Medula Óssea/patologia , Relação Dose-Resposta a Droga , Etanol/química , Feminino , Masculino , Metanol/química , Camundongos , Mitose/efeitos dos fármacos , Índice Mitótico , Morinda/química , Fitoterapia , Casca de Planta , Extratos Vegetais/isolamento & purificação , Folhas de Planta , Caules de Planta , Plantas Medicinais , Medição de Risco , Solventes/química , Uvaria/química
13.
Bioorg Med Chem Lett ; 27(9): 1967-1971, 2017 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-28342587

RESUMO

From the chloroform extract of the leaves of Uvaria dac, four new highly-oxygenated cyclohexene derivatives named uvaridacols I-L (1-4) were isolated together with nine previously reported compounds (5-13). Their structures were determined based on the extensive NMR spectroscopic data and circular dichroism spectroscopic analysis. Among the new compounds, uvaridacol L (4) displayed strong preferential cytotoxicity in the nutrient deprived medium against five different tested pancreatic cancer cell lines, PANC-1 (PC50, 20.1µM), PSN-1 (PC50, 9.7µM), MIA PaCa-2 (PC50, 29.1µM), Capan-1 (73.0µM) and KLM-1 (25.9µM).


Assuntos
Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/farmacologia , Cicloexenos/química , Cicloexenos/farmacologia , Oxigênio/química , Uvaria/química , Antineoplásicos Fitogênicos/isolamento & purificação , Linhagem Celular Tumoral , Cicloexenos/isolamento & purificação , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Pâncreas/efeitos dos fármacos , Neoplasias Pancreáticas/tratamento farmacológico , Folhas de Planta/química
14.
J Nat Prod ; 80(12): 3319-3323, 2017 12 22.
Artigo em Inglês | MEDLINE | ID: mdl-29172496

RESUMO

Two new chlorine-containing polyoxygenated seco-cyclohexenes, albanols A (1) and B (2), along with the oxepinone metabolite grandiuvarone (3) were isolated from the endemic Philippine Annonaceae plant Uvaria alba. Both new compounds exhibited modest antitubercular activity. Compound 1 showed cytostatic activity (ranging from 1-50 µM) against HeLa cells and weak antiproliferative activity against HUVEC and K-562 cells with GI50 values of 106 and 81 µM, respectively.


Assuntos
Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/farmacologia , Cloro/química , Cicloexenos/química , Cicloexenos/farmacologia , Uvaria/química , Annonaceae/química , Linhagem Celular , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Células HeLa , Células Endoteliais da Veia Umbilical Humana , Humanos , Células K562
15.
BMC Complement Altern Med ; 16(1): 468, 2016 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-27846886

RESUMO

BACKGROUND: Diabetes mellitus is a metabolic disorder of multiple aetiology characterised by hyperglycemia resulting from defects in insulin secretion, insulin action or both. It is a global epidemic ravaging both developed and developing countries. The situation will worsen if nothing is done urgently. In fact, the need to identify natural products with antidiabetic potentials is of great importance as supported by several research efforts all over the world, in search of antidiabetic plant based products that are safe and efficacious. Available literatures show that several phytochemicals with antidiabetic properties have been identified in certain plants amongst which include Uvaria chamae. The potentials of Uvaria chamae as an antidiabetic and hypolipidemic drug-candidate are thus tested. METHODS: Diabetes mellitus was experimentally induced after the rats were fasted overnight by administering intraperitoneally, 60 mg/kg streptozotocin. After 72 h, the rats with plasma glucose levels >200 mg/dl were classified as diabetic. A total of six groups containing five rats per group were used. One group of diabetic rats was untreated. Three diabetic groups, each were treated orally with 100, 250 and 400 mg/kg body weight of the extract. Another diabetic group was treated with insulin (0.5 IU/kg) subcutaneously. The control received 0.5 ml (2% solution) of acacia orally. The treatment was for 8 days. The effects of the extract on weight, plasma glucose and other biochemical parameters were evaluated using standard procedures. RESULTS: The diabetic rats treated with the extract showed significant reductions (p < 0.05) in weight, plasma glucose levels, low density lipoprotein and cholesterol compared with the control. The 100, 250 and 400 mg/kg body weight of the extract showed maximum glucose reduction of 85.16, 81.50 and 86.02% respectively. Histologically the pancreas of the diabetic rats treated with the extract, showed clusters of variably sized regenerated islet of Langerhans within sheets of normal exocrine pancreas, while the pancreas of diabetic rats treated with insulin showed no islet of Langerhans. CONCLUSION: The study showed that Uvaria chamae caused weight loss and has good hypoglycemic and hypolipidemic activities that may reduce the risk of developing cardiovascular diseases.


Assuntos
Diabetes Mellitus Experimental/tratamento farmacológico , Hipoglicemiantes/administração & dosagem , Hipolipemiantes/administração & dosagem , Extratos Vegetais/administração & dosagem , Uvaria/química , Animais , Glicemia/metabolismo , Peso Corporal/efeitos dos fármacos , Colesterol/sangue , Diabetes Mellitus Experimental/metabolismo , Diabetes Mellitus Experimental/fisiopatologia , Feminino , Humanos , Insulina/sangue , Fígado/efeitos dos fármacos , Masculino , Raízes de Plantas/química , Ratos , Estreptozocina
16.
Genet Mol Res ; 15(1)2016 Jan 13.
Artigo em Inglês | MEDLINE | ID: mdl-26909907

RESUMO

DNA barcoding, which was developed about a decade ago, relies on short, standardized regions of the genome to identify plant and animal species. This method can be used to not only identify known species but also to discover novel ones. Numerous sequences are stored in online databases worldwide. One of the ways to save cost and time (by omitting the sequencing step) in species identification is to use available barcode data to design optimized primers for further analysis, such as high-resolution melting analysis (HRM). This study aimed to determine the effectiveness of the hybrid method Bar-HRM (DNA barcoding combined with HRM) to identify species that share similar external morphological features, rather than conduct traditional taxonomic identification that require major parts (leaf, flower, fruit) of the specimens. The specimens used for testing were those, which could not be identified at the species level and could either be Uvaria longipes or Uvaria wrayias, indicated by morphological identification. Primer pairs derived from chloroplast regions (matK, psbA-trnH, rbcL, and trnL) were used in the Bar-HRM. The results obtained from psbA-trnH primers were good enough to help in identifying the specimen while the rest were not. Bar-HRM analysis was proven to be a fast and cost-effective method for plant species identification.


Assuntos
Código de Barras de DNA Taxonômico , DNA de Cloroplastos , Uvaria/genética , Desnaturação de Ácido Nucleico , Uvaria/classificação
17.
Bioorg Med Chem Lett ; 25(16): 3246-50, 2015 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-26077495

RESUMO

A new polyoxygenated cyclohexene, (-)-3-O-debenzoylzeylenone (1), and a new megastigmane glycoside, grandionoside A (2), were isolated from the aerial parts of Uvaria grandiflora collected in Vietnam, together with ten known compounds including polyoxygenated cyclohexenes (3-6), a triterpenoid (7), an alkaloid (8), a long chain alcohol (9), hexenyl glycopyranoside (10), and saponins (11-12). Their chemical structures were elucidated by a combination of extensive NMR spectroscopy with X-ray crystallographic analysis for 1, and chemical conversion for 2. Compound 1 exhibited significant cytotoxicity against the LU-1 and SK-Mel-2 cell lines with IC50 values of 4.68 and 3.63 µM, respectively. Remarkably, the cytotoxicity of 12 against the LU-1, KB, Hep-G2, MKN-7, and SW-480 cell lines was comparable to that of ellipticine, the positive control, with IC50 values ranging from 1.24 to 1.60 µM.


Assuntos
Antineoplásicos Fitogênicos/isolamento & purificação , Antineoplásicos Fitogênicos/farmacologia , Cicloexanonas/isolamento & purificação , Cicloexanonas/farmacologia , Cicloexenos/isolamento & purificação , Cicloexenos/farmacologia , Glucosídeos/isolamento & purificação , Glucosídeos/farmacologia , Norisoprenoides/isolamento & purificação , Norisoprenoides/farmacologia , Uvaria/química , Sequência de Carboidratos , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Ensaios de Seleção de Medicamentos Antitumorais , Elipticinas/farmacologia , Glicosídeos , Humanos , Espectroscopia de Ressonância Magnética , Modelos Moleculares , Dados de Sequência Molecular , Difração de Raios X
18.
Bioorg Med Chem Lett ; 24(13): 2815-9, 2014 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-24835628

RESUMO

We report the synthesis and biological evaluation of three analogues of the natural product (+)-grandifloracin (+)-1. All three analogues exhibit enhanced antiproliferative activity against PANC-1 and HT-29 cells compared to the natural product. The retention of activity in an analogue lacking the enone functional group, 9, implies this structural element is not an essential part of the (+)-grandifloracin pharmacophore.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Hidrocarbonetos Aromáticos com Pontes/química , Hidrocarbonetos Aromáticos com Pontes/farmacologia , Cetonas/química , Antineoplásicos Fitogênicos/síntese química , Antineoplásicos Fitogênicos/química , Hidrocarbonetos Aromáticos com Pontes/síntese química , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Cristalografia por Raios X , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Células HT29 , Humanos , Modelos Moleculares , Estrutura Molecular , Estereoisomerismo , Relação Estrutura-Atividade , Uvaria/química
19.
J Nat Prod ; 77(12): 2711-5, 2014 Dec 26.
Artigo em Inglês | MEDLINE | ID: mdl-25372601

RESUMO

Two tetrahydroxanthene-1,3(2H)-dione metabolites, valderramenols A (1) and B (2), were isolated from the Philippine endemic Annonaceous species Uvaria valderramensis. Planar structures of the rac-xanthene-1,3-(2H)-diones 1 and 2 were established by MS and NMR measurements. Their enantiomers were separated by chiral HPLC, and the absolute configurations of the separated enantiomers were determined by comparison of the HPLC-ECD spectra with computed TDDFT-generated spectra. A TDDFT-ECD study of the known grandiuvarone (3) allowed the revision of its absolute configuration as S. Compound 1 showed antitubercular activity (MIC 10 µg/mL), while 3 and 4 had weaker activities (MIC 32 µg/mL). Oxepinone 3 exhibited cytotoxic activity against KB-562, a chronic myeloid leukemia cell line.


Assuntos
Antineoplásicos/isolamento & purificação , Uvaria/química , Xantonas/isolamento & purificação , Antineoplásicos/química , Antineoplásicos/farmacologia , Cromatografia Líquida de Alta Pressão , Ensaios de Seleção de Medicamentos Antitumorais , Leucemia Mieloide/tratamento farmacológico , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Filipinas , Folhas de Planta/química , Estereoisomerismo , Xantonas/química , Xantonas/farmacologia
20.
Zhong Yao Cai ; 37(11): 2008-11, 2014 Nov.
Artigo em Zh | MEDLINE | ID: mdl-26027122

RESUMO

OBJECTIVE: To study the secondary metabolites of the endophytic fungus Arthrinium sp. A092 from Uvaria microcarpa. METHODS: The compounds were isolated and purified by silica gel column chromatography, reverse silica gel column chromatography, Sephadex LH-20 column chromatography, HPLC, preparative TLC and recrystallization. Their structures were identified by extensive analysis of their spectroscopic data. RESULTS: Ten compounds were isolated from the fermentation broth extract of strain A092 and identified as flemingipanic acid(1), ( - )-gynuraone(2),2-(4-methoxy-phenyl)-ethanol(3),2-hexyl-methymaleic anhydride(4), {1-[(12E, 16E)]-12,16-eicosadienoyl]-2-[ (E, E)-7, 10-octadecadienoyl]-3-stearoylglycerol} (5), mycoediketoperazine (6), libertellenone C(7),4-hydroxymethyl-4, 6-octadiene-2, 3-diol (8), dimethyl phthalate (9), and di-(2-ethyl)-hexylphthalate (10). CONCLUSION: Compounds 1,3 - 5 and 8 - 10 are isolated from the genus Arthrinium for the first time.


Assuntos
Ascomicetos/química , Uvaria/microbiologia , Cromatografia Líquida de Alta Pressão , Fermentação , Ácidos Ftálicos , Salicilatos , Metabolismo Secundário
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