Suciati SUCIATI, Erlinda Rhohmatul LAIL, Debora POERWANTORO, Anita Probo HAPSARI, Lailatul Zakiyah GIFANDA, Karma RABGAY, Wiwied EKASARI, Kornkanok INGKANINAN

Evaluation of cholinesterase inhibitory activity of six Indonesian Cassia species

Alzheimer’s disease (AD) is a neurodegenerative disorder, which is the most common cause of dementia. The aging population means that the number of people suffering from AD is expected to increase each year if there is no effective treatment found. One of the strategies for the treatment of AD is the use of cholinesterase inhibitors. Plants have been the source of many bioactive metabolites, including cholinesterase inhibitors. The objective of this study is to investigate the potency of several plant extracts from the genus Cassia as cholinesterase inhibitors. The cholinesterase inhibitory screening was carried out against two enzymes, acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), according to the modified Ellman’s method. The chemistry of the active fractions was studied by LC-MS/MS method. The results suggested that amongst six plant extracts from the genus Cassia investigated, the ethanolic extract of Cassia spectabilis showed the strongest inhibition against both AChE and BChE enzymes, with IC50 values of 39.5 and 36.9 µg/mL, respectively. Investigation on the n-hexane, ethyl acetate, and nbutanol fractions obtained from the C. spectabilis extract showed that the ethyl acetate and the n-butanol fractions gavebetter inhibitory activity compared to the n-hexane fraction. Based on the LC-MS/MS data, the two active fractionsgave similar profile. Both fractions contained alkaloid cassine and spectaline, which may responsible for thecholinesterase inhibitory activity

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