HYDROXYL RADICAL SCAVENGING EFFECT

OF VIETNAMESE MEDICINAL PLANTS

Phuong Thien Thuong^1,*, Nguyen Duy Thuan²

¹ Vietnam National Institute of Medicinal Materials

² Vietnam University of Traditional Medicine

* phuongthienthuong@yahoo.com

(Received September 17^th, 2014)

Summary

Hydroxyl Radical Scavenging Effect of Vietnamese Medicinal Plants

Twelve samples were found to have considerable scavenging activity against hydroxyl radical (OH^•) among methanol extracts of 126 Vietnamese traditional herbals evaluated. Of these, methanol extracts of Oroxylum indicum (cortex), Cinnamomum cassia (folium), Tetracera scandens (stem), Polygonum multiflorum (rhizome), and Celastrus hindsii (stem) exhibited remarkable quenching capacity with the inhibitions of 51.3, 43.8, 41.7, 39.1 and 36.6 %, respectively, at the concentration test of 200 mg/ml. The relationship between antioxidant activities and total phenolic compounds and are discussed.

Keywords: Vietnamese medicinal plants, Antioxidant activity, Free radical scavenging, Hydroxyl radical.

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