RESUMEN
Morus nigra L. (Moraceae) is a tree known as black mulberry and the leaves are used in folk medicine in the treatment of diabetes, high cholesterol and menopause symptoms. The aim of this study was to evaluate the M. nigra leaves phytochemical profile in different extractions and the hypolipidemic effect of the infusion comparing to the fenofibrate. Morus nigra infusion (MN) showed higher amounts of phenolics and flavonoids (83.85 mg/g and 79.96 µg/g, respectively), as well as antioxidant activity (83.85%) than decoction or hydromethanolic extracts. Although, decoction showed the best result for ascorbic acid (4.35 mg/100 g) than hydromethanolic or infusion (2.51 or 2.13 mg/100 g, respectively). The phenolic acids gallic, chlorogenic and caffeic and the flavonoids quercetin, rutin and catechin were found in the M. nigra extracts. Hyperlipidemic rats treated with 100, 200 or 400 mg/kg of MN decreased serum cholesterol, triglycerides and normalized lipoproteins. Furthermore, MN inhibited lipid peroxidation in liver, kidney and brain of hyperlipidemic rats. This study provides evidence that M. nigra leaves extracts are rich in polyphenols, mainly chlorogenic acid, which normalized hyperlipidemic disturbance. The results suggest a potential therapeutic effect of the M. nigra leaves infusion on dislipidemic condition and related oxidative stress.
Asunto(s)
Lípidos/sangre , Morus/química , Fenoles/farmacología , Extractos Vegetales/farmacología , Hojas de la Planta/química , Animales , Antioxidantes/farmacología , Ácido Ascórbico/farmacología , Modelos Animales de Enfermedad , Flavonoides/farmacología , Masculino , Fenoles/aislamiento & purificación , Ratas , Ratas WistarRESUMEN
ABSTRACT Morus nigra L. (Moraceae) is a tree known as black mulberry and the leaves are used in folk medicine in the treatment of diabetes, high cholesterol and menopause symptoms. The aim of this study was to evaluate the M. nigra leaves phytochemical profile in different extractions and the hypolipidemic effect of the infusion comparing to the fenofibrate. Morus nigra infusion (MN) showed higher amounts of phenolics and flavonoids (83.85 mg/g and 79.96 µg/g, respectively), as well as antioxidant activity (83.85%) than decoction or hydromethanolic extracts. Although, decoction showed the best result for ascorbic acid (4.35 mg/100 g) than hydromethanolic or infusion (2.51 or 2.13 mg/100 g, respectively). The phenolic acids gallic, chlorogenic and caffeic and the flavonoids quercetin, rutin and catechin were found in the M. nigra extracts. Hyperlipidemic rats treated with 100, 200 or 400 mg/kg of MN decreased serum cholesterol, triglycerides and normalized lipoproteins. Furthermore, MN inhibited lipid peroxidation in liver, kidney and brain of hyperlipidemic rats. This study provides evidence that M. nigra leaves extracts are rich in polyphenols, mainly chlorogenic acid, which normalized hyperlipidemic disturbance. The results suggest a potential therapeutic effect of the M. nigra leaves infusion on dislipidemic condition and related oxidative stress.
Asunto(s)
Animales , Masculino , Ratas , Fenoles/farmacología , Extractos Vegetales/farmacología , Hojas de la Planta/química , Morus/química , Lípidos/sangre , Fenoles/aislamiento & purificación , Ácido Ascórbico/farmacología , Flavonoides/farmacología , Ratas Wistar , Modelos Animales de Enfermedad , Antioxidantes/farmacologíaRESUMEN
Chemical investigation of the tubers of Sinningia allagophylla led to the isolation of two new chromenes, (2S)-12-hydroxylapachenole (1) and (3R)-3,4-dihydro-3-hydroxy-4-oxo-8-methoxylapachenole (2), and three new dimeric chromenes, allagophylldimers A-C (3-5). Thirteen known compounds, 6-methoxy-7,8-benzocoumarin (6), lapachenole, 8-methoxylapachenole, tectoquinone, 7-hydroxytectoquinone, dunniol, α-dunnione, dunnione, 8-hydroxydunnione, aggregatin E, cedrol, oleanolic acid, and halleridone, were also identified. 6-Methoxy-7,8-benzocoumarin (6) has been isolated for the first time from a natural source.
Asunto(s)
Benzopiranos/aislamiento & purificación , Naftalenos/aislamiento & purificación , Tubérculos de la Planta/química , Plantas Medicinales/química , Benzofuranos/química , Benzofuranos/aislamiento & purificación , Benzopiranos/química , Brasil , Ciclohexanonas/química , Ciclohexanonas/aislamiento & purificación , Estructura Molecular , Naftalenos/química , Naftoquinonas/química , Naftoquinonas/aislamiento & purificación , Sesquiterpenos Policíclicos , Terpenos/química , Terpenos/aislamiento & purificaciónRESUMEN
The essential oils of the leaves of Eugenia brasiliensis, Eugenia beaurepaireana, and Eugenia umbelliflora were analyzed by GC-MS. The major compounds found in the oil of E. brasiliensis were spathulenol (12.6%) and tau-cadinol (8.7%), of E. beaurepaireana were beta-caryophyllene (8.0%) and bicyclogermacrene (7.2%), and of E. umbelliflora were viridiflorol (17.7%) and beta-pinene (13.2%). These oils were assayed to determine their antibacterial activity against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli. All of the oils analyzed showed antibacterial activity, ranging from moderate to strong, which was most accentuated for the E. umbelliflora and E. brasiliensis oils, which strongly inhibited the growth of S. aureus giving values of MIC = 119.2 and 156.2 microg/mL, respectively.
Asunto(s)
Antibacterianos/química , Antibacterianos/farmacología , Bacterias/efectos de los fármacos , Aceites Volátiles/química , Aceites Volátiles/farmacología , Syzygium/química , Escherichia coli/efectos de los fármacos , Pruebas de Sensibilidad Microbiana , Pseudomonas aeruginosa/efectos de los fármacos , Staphylococcus aureus/efectos de los fármacosRESUMEN
The hydroalcoholic extract of the leaves from Rheedia gardneriana yielded volkensiflavone (1), fukugetin (2), fukugiside (3), GB2a-I-7-O-glucoside (4) and epicatechin (5). Compounds 1-5, and some derivatives of 1 and 2 were evaluated for lethality to brine shrimp larvae and for antibacterial activity.