Criblage de plantes Mahoraise pour des usages cosmétiques

This study's main aim is to identify plant species showing anti-oxidant, anti-inflammatory and skin whitening properties. A selection of samples from previous infield studies on the traditional uses of plants in Mayotte were analyzed. The anti-oxidant activity was assessed using the ¿, ¿-diphenyl-ß-picrylhydrazyl (DPPH) method developed by Blois [1]. The anti-inflammatory activity and the skin whitening activity were both assessed through the study of inhibition kinetics from specific enzymes.The IC50 value for each sample and for each activity was obtained using UV/Vis spectrophotometric technics. They were then compared with the ones obtained from known molecules found in the literature. The most effective anti-oxidant activity was observed in fresh leaves from Acalypha wilkesiana Müll.Arg. (IC50 = 0,381 g/L) and Leea guineensis G. Don. (IC50 = 0,225 g/L) as well as in dried roots from Litchi chinensis Sonn. (IC50 = 0,346 g/L). The analysis for the two other activities are currently showing promising results.