Journal
PHYTOMEDICINE
Volume 14, Issue 6, Pages 403-408Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.phymed.2006.09.003
Keywords
Smilax china; Smilax Rhizonia; stilbenoids; Alzheimer's disease; BACE1 (beta-secretase)
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Funding
- Rural Development Administration (RDA), Republic of Korea [NICS-7-P1-44] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In the course of searching for BACE1 (beta-secretase) inhibitors from natural products, the ethyl acetate soluble fraction of Smilax Rhizoma (the dried rhizomes of Smilax china L.) showed potent inhibitory activity. The active compounds were identified as a trans/cis-resveratrol mixture, oxyresveratrol, veraphenol, and cis-scirpusin A. They were shown to non-competitively inhibit BACE1 with the Ki values of 5.4 x 10(-6), 5.4 x 10-6, 3.4 x 10(-6), and 5.4 x 10(-6) M and IC50 values of 1.5 x 10(-5), 7.6 x 10(-6) 4.2 x 10(-6), and 1.0 x 10(-5) M, respectively. The active compounds were less inhibitory to alpha-secretase (TACE) and other serine proteases such as chymotrypsin, trypsin, and elastase, suggesting that they were relatively specific inhibitors of BACE1 (C) 2006 Elsevier GmbH. All rights reserved.
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