In the present study, 36 plant extracts, belonging to 6 families from Burkina Faso were used to evaluate their glutathione-S-transferase (GST), acetylcholinesterase (AChE), carboxylesterase (CES) and xanthine oxidase (XO) inhibitory activities and their phenolic, tannin and flavonoids contents by using spectrophotometrical methods. At 100 jug mL_1, Lippia chevalieri, Eclipta prostrata, Lontana cámara and Indigofera pulchra extracts showed the best percentage of inhibition by regulating GST, AChE, CES and XO activities, respectively. The phytochemical investigations showed that all plant extracts were rich in biological compounds, namely phenolic, tannin and flavonoids. Particularly Cassia mimosoides extract presented the best phenolic, tannin and flavonoid contents. This result indicated that phenolic from Ceasalpiniaceae, flavonoids from Combretaceae and tannin …

Medicinal plants, phenolic content, tannin content, flavonoid content