Abstract

Damintoti Karou1 *, Aly Savadogo1 , Antonella Canini2 , Saydou Yameogo1 , Carla Montesano2 , Jacques Simpore3 , Vittorio Colizzi2 , Alfred S. Traore1

Sida acuta is a shrub indigenous to pantropical regions. The plant is widely used for its various pharmacological properties. Among compounds of pharmacological interest occurring in the plant, are indoloquinoline alkaloids. The aim of the present study was to investigate the antimicrobial activity of alkaloids of S. acuta from Burkina Faso. The alkaloids had a good antimicrobial activity against the test microorganisms. In the agar- well diffusion assay, highest inhibition zone diameters were recorded with Gram-positive bacteria. The broth microdilution assay gave minimal inhibitory concentration values ranging from 16 to 400 µg/ml and minimal bactericidal concentration values ranging from 80 to up to 400 µg/ml. The gas chromatography-mass spectrometry analysis of the same alkaloids led to the identification of cryptolepine and quindoline as the major components.