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Research articles

ScienceAsia 42(2016): 247-251 |doi: 10.2306/scienceasia1513-1874.2016.42.247

Acetylcholinesterase inhibition and cytotoxicity of flavonoids and chalcones from Derris indica

Thurdpong Sribuhoma, Chalotorn Saraphona, Phatharapoll Decharchoocharta, Chantana Boonyaratb, Chavi Yenjaia,*

ABSTRACT:     Derris indica, a Thai medicinal plant, contains biologically active substances such as flavone, flavanone, chalcone, and rotenoid compounds. Many compounds from this plant show antitumour, antihyperglycaemic, and anti-inflammatory activities. In this study, eleven compounds including six flavonoid and five chalcone compounds were isolated from the seed of D. indica. Their structures were established on the basis of NMR spectroscopic data. Desmethoxykanugin showed 100% inhibition to acetylcholinesterase, being about two fold stronger than the standard, tacrine, but cytotoxic against normal cells. Fortunately, pongaflavone and (2R,3R)-3-hydroxy-5-methoxy-2′′,2′′-dimethylpyrano[7,8:5′′,6′′]-flavanone displayed around 50% inhibition to AChE as compared to the standard and they were inactive against normal cells. Thus these compounds could be developed to treat Alzheimer's disease. In addition, candidone, pongamol, obovatachalcone, derrischalcone, and tunicatachalcone showed cytotoxic activity against KB cell line with IC50 values ranging from 8–18 µg/ml.

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a Natural Products Research Unit, Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002 Thailand
b Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002 Thailand

* Corresponding author, E-mail: chayen@kku.ac.th

Received 29 Dec 2015, Accepted 11 Sep 2016