Resumo

OLIVEIRA SOUZA, Daniele et al. Antibacterial and modulatory activity of Cecropia pachystachya Trécul on the action of aminoglycosides. Rev Cubana Plant Med [online]. 2014, vol.19, n.3, pp.121-132. ISSN 1028-4796.

Introduction: Cecropia pachystachya Trécul, commonly known as 'toré' (Urticaceae) and distributed throughout Brazil, is used in folk medicine to treat respiratory and sexually transmitted infections such as gonorrhea. Objective: evaluate the antibacterial and modulatory activity on antibiotics of the ethanolic extract and methanolic fractions of C. pachystachya T. leaves and stems against standard and multiresistant bacterial strains. Methods: the plant material (leaves and stems) was collected in Araripe, crushed and put into ethanol PA as solvent. Distillation of the solvent was then performed in a rotary evaporator to produce the extracts, which were divided and subjected to the methanolic solvent to obtain the fractions. A microdilution assay was conducted to verify antibacterial activity and the possible interactions of aminoglycosides associated with the study samples. A sub-inhibitory concentration of 128 ?g/mL (MIC/8) was used. Results: the most representative effect was the association of neomycin with EEFCP (ethanolic extract of leaves of C. pachystachya T.) and its fraction, with a MIC reduction of 312.5 for 39.06 µg/mL and 312.50 for 78.13 µg/mL, respectively, against Staphylococcus aureus 358. An antagonistic effect was observed against E. coli 27. Conclusions: the data obtained indicate that C. pachystachya methanolic fractions and extract may be an important alternative in the search for substances with an action against multiresistant Staphylococcus bacteria. However, such a substance may also negatively affect the action of the drugs studied. It is necessary to conduct new experiments in vivo to verify such an action.

Palavras-chave : Cecropia pachystachya T.; antibacterial activity; modulatory activity.

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