Bioscience, Biotechnology, and Biochemistry
Online ISSN : 1347-6947
Print ISSN : 0916-8451
Food & Nutrition Science Regular Papers
Inhibitory Effect of Poncirus trifoliate on Acetylcholinesterase and Attenuating Activity against Trimethyltin-Induced Learning and Memory Impairment
Jae Kyeom KIM, Heyri BAE, Mi-Jeong KIM, Soo Jung CHOI, Hong Yon CHO, Han-Joon HWANG, Young Jun KIM, Seung Taik LIM, Eun Ki KIM, Hye Kyung KIM, Bok Yong KIM, Dong-Hoon SHIN
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Keywords: methoxsalen (8-methoxy-2′,3′,6,7-furocoumarin), Poncirus trifoliate, Alzheimer’s disease, acetylcholinesterase, amyloid beta peptide
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2009 Volume 73 Issue 5 Pages 1105-1112

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Abstract

Various native Korean plants were screened to find an effective acetylcholinesterase (AChE) inhibitor for the treatment of Alzheimer’s disease (AD). Among these plants, the ethanol extract of Poncirus trifoliate was selected for isolating the AChE inhibitor because it exhibited the highest inhibitory activity (47.31%). To separate the active compound from Poncirus trifoliate, solvent partition, open column chromatography, thin-layer chromatography (TLC), and high-performance liquid chromatography (HPLC) were utilized. The putative chemical structure of the AChE inhibitor was identified as methoxsalen by successive analysis with electron ionization mass spectrometry (EI-MS) and 13C/1H-nuclear magnetic resonance (NMR). To confirm the attenuating effect of the Poncirus trifoliate extract against trimethyltin (TMT)-induced neurotoxicity, in vivo behavior tests were carried out. Our findings suggest that the Poncirus trifoliate extract significantly reversed TMT-induced learning and memory impairment. These results demonstrate that the Poncirus trifoliate extract could possess a wide range of beneficial activities for neurodegenerative disorders, notably AD.

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© 2009 by Japan Society for Bioscience, Biotechnology, and Agrochemistry
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