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Cholinesterase inhibitors from the roots of Harpagophytum procumbens

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Abstract

Inhibition of cholinesterase has been proposed to be a therapeutic target for the treatment of Alzheimer’s diseases. In our preliminary screening study on the acetylcholinesterase (AChE) inhibitory activity, an ethyl acetate soluble fraction of the roots of Harpagophytum procumbens (Pedaliaceae) was found to inhibit AChE activity at the concentration of 100 μg/mL. Ten compounds (110) were isolated from the active fraction and evaluated for their inhibitory effect on AChE and butyrylcholinesterase (BChE). Among the isolates, verbascosides (5, 6, and 8) containing a caffeoyl and a 3,4-dihydroxyphenethyl groups in their structures, showed effective AChE inhibitory activity and also possessed BChE inhibitory activity. The findings suggest that verbascoside derivatives may be partially related to the anti-Alzheimer effect of this medicinal plant.

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Acknowledgments

This research was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (KRF-2012R1A1A2003547) and BK 21 Plus (KRF-22A20130000073). We are grateful to the Korean Basic Science Institute (KBSI) for supplying the NMR spectra.

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Correspondence to Byung Sun Min.

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Yoon Ho Bae and To Dao Cuong have contributed equally to this work.

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Bae, Y.H., Cuong, T.D., Hung, T.M. et al. Cholinesterase inhibitors from the roots of Harpagophytum procumbens . Arch. Pharm. Res. 37, 1124–1129 (2014). https://doi.org/10.1007/s12272-013-0316-y

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  • DOI: https://doi.org/10.1007/s12272-013-0316-y

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