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1.
em Espanhol, Espanhol | CUMED | ID: cum-3599335993

RESUMO

Después de demostrar un potente efecto antibacteriano y antifúngico en las hojas de Melaleuca leucadendron L . y teniendo en cuenta otros efectos señalados como antihelmíntico, parasiticida en enfermedades de la piel e incluso insecticida, nos propusimos ampliar los estudios biológicos de esta planta en relación con posibles efectos perjudiciales. Se evaluó el extracto fluido obtenido de las hojas en un sistema de ensayo a corto plazo in vitro utilizando Aspergillus nidulans cepa UH-223 para conocer la potencialidad del extracto como reductor del crecimiento de las colonias e inductor de daño genético en este microorganismo. Los estudios se realizaron por el método de incorporación en placa y como resultado se obtuvo una disminución considerable del tamaño de las colonias del microorganismo a causa del efecto tóxico del extracto y a su vez aumentó el índice de segregación mitótica como expresión de genotoxicidad para el microorganismo de ensayo, se obtuvieron valores incluso superiores al control positivo utilizado. Recomendamos continuar profundizando los estudios empleando otros ensayos que amplíen la evaluación del potencial genotóxico del Cayeput como comúnmente se conoce esta planta frecuentemente usada por la población...(AU)


Después de demostrar un potente efecto antibacteriano y antifúngico en las hojas de Melaleuca leucadendron L . y teniendo en cuenta otros efectos señalados como antihelmíntico, parasiticida en enfermedades de la piel e incluso insecticida, nos propusimos ampliar los estudios biológicos de esta planta en relación con posibles efectos perjudiciales. Se evaluó el extracto fluido obtenido de las hojas en un sistema de ensayo a corto plazo in vitro utilizando Aspergillus nidulans cepa UH-223 para conocer la potencialidad del extracto como reductor del crecimiento de las colonias e inductor de daño genético en este microorganismo. Los estudios se realizaron por el método de incorporación en placa y como resultado se obtuvo una disminución considerable del tamaño de las colonias del microorganismo a causa del efecto tóxico del extracto y a su vez aumentó el índice de segregación mitótica como expresión de genotoxicidad para el microorganismo de ensayo, se obtuvieron valores incluso superiores al control positivo utilizado. Recomendamos continuar profundizando los estudios empleando otros ensayos que amplíen la evaluación del potencial genotóxico del Cayeput como comúnmente se conoce esta planta frecuentemente usada por la población...(AU)


After demonstrating a potent antifungal and antibacterial effect in Melaleuca leucadendron L. leaves, and having into account other described effects as antihelminthic, parasiticide in skin diseases and even insecticide, we wanted to widen the biologic studies of this plant to find its possible prejudicial effects. We evaluated the fluid extract of these leaves in a short-time in vitro assay, using Aspergillus nidulans strain UH-223 to know the extract potential as grow reductor of the colonies and inductor of genetic damages in this microorganism. The studies were carried out using the method of adding in plates; as a result we obtained a considerable reduction of the microorganism colonies dimension, caused by the toxic effect of the extract, and also a raise of the mitotic segregation index, as a expression of genotoxicity for the assayed microorganism; we obtained even higher values than in the positive control used. We recommend continuing this study, using other assays that may improve the evaluation of the genotoxic potential of Capeyut, as it is commonly known this plant, frequently used by people...(AU)


After demonstrating a potent antifungal and antibacterial effect in Melaleuca leucadendron L. leaves, and having into account other described effects as antihelminthic, parasiticide in skin diseases and even insecticide, we wanted to widen the biologic studies of this plant to find its possible prejudicial effects. We evaluated the fluid extract of these leaves in a short-time in vitro assay, using Aspergillus nidulans strain UH-223 to know the extract potential as grow reductor of the colonies and inductor of genetic damages in this microorganism. The studies were carried out using the method of adding in plates; as a result we obtained a considerable reduction of the microorganism colonies dimension, caused by the toxic effect of the extract, and also a raise of the mitotic segregation index, as a expression of genotoxicity for the assayed microorganism; we obtained even higher values than in the positive control used. We recommend continuing this study, using other assays that may improve the evaluation of the genotoxic potential of Capeyut, as it is commonly known this plant, frequently used by people...(AU)


Assuntos
Melaleuca/toxicidade , Cajuputum/uso terapêutico , Plantas Medicinais/toxicidade , Melaleuca/toxicidade , Cajuputum/uso terapêutico , Plantas Medicinais/toxicidade
2.
Rev. ciênc. farm. básica apl ; 27(3): 197-205, 2006. tab, graf
Artigo em Espanhol | LILACS | ID: lil-466201

RESUMO

The search for new treatments against malaria has a highpriority in the fight to bring this disease under control. The aim of this study was to assess the therapeutic potential of extracts of plants selected on the basis of ethnobotanical information collected from Cuban traditional medicine. Extracts from six plants (Bambusavulgaris, Parthenium hysterophorus, Melaleuca leucadendron, Indigofera suffruticosa, Artemisia absinthium, Simarouba glauca) were tested for their invitro effect against the F32/Tanzania strain ofPlasmodium falciparum. S. glauca, P. hysterophorus, M.leucadendron and A. absinthium exhibited minimum inhibitory concentrations (MIC) in the range from 3.1to 50 g/mL, while B. vulgaris and I. suffruticosa showed negative activity against this strain. The highest in vivo activities against Plasmodium berghei NK65 were shownby A. absinthium, with a 65.9% reduction in parasitemia at a dose of 500 mg/kg, M. leucadendron, with 50%reduction at 250 mg/kg, and S. glauca, with 43.2%reduction at 100 mg/kg. The less toxic extracts wereA. absinthium and M. leucadendron. These results demonstrate the antimalarial properties of some Cuban medicinal plants and pave the way to detailed researchon their active chemical constituents.


Assuntos
Etnobotânica , Malária Falciparum , Fitoterapia , Plantas Medicinais , Bambusa , Cajuputum , Indigofera , 60715
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