Determinação da atividade biologica de bioterapico e extrato de propolis "in vitro" e "in vivo" na infecção experimental determinada por Leishmania (Viannia) braziliensis

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

Nowadays antimonials have been the drugs chosen for the Leishmaniosis treatment. Nevertheless, they have shown problems such as high toxicity and some parasite resistance occurrences. Many researchers have investigated the possibility that products from animal and vegetal origin may play an important role in the therapeutics of this disease, with less toxicity and lower prices. This work evaluates the leishmanicyd activity of propolis extract, an apitherapic product, and also of a biotherapic homeopathic drug over the Leishmania (Viannia) braziliensis promastigote and amastigote forms, through in vitro and in vivo assays by means of Mus Musculus animals treatment, which were experimentally infected. Resulting trom the in vitro assays, propolis revealed a better lysis percentage and inhibition coefficient (IC 50) over the promastigote forms when compared to positive control (anphotericin B). Both the biotherapic drug and propolis extract did not show reasonable results over amastigote fonns. Regarding to the in vivo assays, during a 90-day-treatement, a variation of the lesion mean diameter of the Mus Muscu/us mice infected by L.(V.) braziliensis was observed, there was a reduction in the lesion size. Both drugs showed good results in respect to negative control (0.9% saline solution). Being aware of the importance of NO production to control the infection on several intracellular parasites, the capacity of inducting NO production was evaluated using both propolis and biotherapics. An expressive induction was observed only concerning propolis. Such find encourages a further research on those drugs, for instance, the chemical characterization and the isolation of propolis active principles, responsible for its biological activity, as well as the standardization of homeopatic methodologies in the biotherapic inactivation with the pourposes of a better therapeutic drug action

ASSUNTO(S)

oxido nitrico leishmaniose

ACESSO AO ARTIGO

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