RESUMO
Context: Laurelia sempervirens (R. et P.) Tul., is an evergreen tree that growths in southern Chile, its leaves and bark are used in folk medicine as an infusion. Objective: The antimicrobial activities of the essential oil and ethyl acetate extract obtained from the bark of Laurelia sempervirens were investigated. Materials and methods: Ethyl acetate extract and essential oil were analyzed by GC- mass and the antimicrobial activity was investigated against gram positive and gram negative bacteria. Results: The extract and essential oil showed a strong antimicrobial activity against bacteria such as Acinetobacter baumanii, a relevant world nosocomial pathogen Discussion and conclusion: These findings demonstrate that the ethyl acetate extract and essential oil of L.sempervirens bark have excellent antimicrobial activities and thus have great potential as a source for natural health products.
Contexto: Laurelia sempervirens (R. et P.) Tul., es un árbol de hoja perenne que crece en el sur de Chile, sus hojas y corteza se utilizan en medicina popular como infusión. Objetivo: Investigar la actividad antimicrobiana del aceite esencial y el extracto de acetato de etilo obtenido de la corteza de Laurelia sempervirens. Materiales y métodos: El extracto de acetato de etilo y el aceite esencial se analizaron por GC-masa y la actividad antimicrobiana se analizó contra bacterias gram positivas y gram negativas. Resultados: El extracto y aceite esencial evidenció una fuerte actividad antimicrobiana frente a la bacteria, Acinetobacter baumanii patógeno que causa infecciones nosocomiales de relevancia mundial. Discusión y conclusiones: Estos hallazgos demuestran que el extracto de acetato de etilo y aceite esencial de corteza de L.sempervirens tienen excelentes actividades antimicrobianas y por lo tanto tienen un gran potencial como fuente de productos naturales para la salud.
Assuntos
Anti-Infecciosos , Óleos Voláteis/farmacologia , Bactérias , Folhas de Planta/química , Laurus/química , Acetatos , Acinetobacter baumannii , Chile , Cromatografia , Casca de Planta/química , Extratos Vegetais/farmacologiaRESUMO
Catechols were synthesized from safrole. Nine derivatives were prepared and assessed for antiproliferative effects using different human cell lines. The in vitro growth inhibition assay was based on the sulphorhodamine dye to quantify cell viability. The derivatives 4-allylbenzene-1,2-diol (3), 4 4-[3-(acetyloxy)propyl]-1,2-phenylene diacetate (6) and 4-[3-(acetyloxy)propyl]-5-nitro-1,2-phenylene diacetate (10) showed higher cytotoxicity than the parent compound 2 in tests performed on two breast cancer cell lines (MCF-7 and MDA-MB-231). The IC50 values of 40.2 ± 6.9 µM, 5.9 ± 0.8 µM and 33.8 ± 4.9 µM, respectively, were obtained without toxicity towards dermal human fibroblast (DHF cells).
Assuntos
Catecóis/farmacologia , Safrol/análogos & derivados , Safrol/farmacologia , Neoplasias da Mama/patologia , Catecóis/síntese química , Linhagem Celular , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Feminino , Humanos , Safrol/síntese químicaRESUMO
A selective route for the degradation of the unsaturated side chain of ent-labdanes has been devised, giving two useful synthons: 2beta-acetoxy-14,15,17-trinor-ent-labdane-8,13- dione (5) and 2beta-acetoxy-14,15-dinor-ent-labd-8(17)-en-13-one (7), the use of which for the preparation of terpenylquinone derivatives shall be reported elsewhere.
