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Letters in Drug Design & Discovery

Editor-in-Chief

ISSN (Print): 1570-1808
ISSN (Online): 1875-628X

Suppressive Components in Salvia miltiorrhiza Against Trp-P-1 and Activated Trp-P-1-Induced SOS Response Using Salmonella typhimurium TA1535 / pSK1002 Umu Test

Author(s): Yoshiharu Okuno and Mitsuo Miyazawa

Volume 1 , Issue 1 , 2004

Page: [66 - 68] Pages: 3

DOI: 10.2174/1570180043485635

Abstract

The methanol extract from Salvia miltiorrhiza Bungee showed a suppressive effect on umu gene expression of the SOS response in Salmonella typhimurium TA1535 / pSK1002 against the mutagen, Trp-P-1, which requires liver metabolizing enzyme. The methanol extract was successively re-extracted with dichloromethane, butanol, and water. Three suppressive compounds were isolated by SiO2 column chromatography from dichloromethane fraction and identified as tanshinone IIA (1), tanshinone I (2) and Cryptotanshinone (3) by GC, GC-MS, 1H- and 13C-NMR spectroscopy. Compounds 1, 2 and 3 inhibited the SOS-inducing activity of Trp-P-1 in the umu test. Gene expression was suppressed by 76%, 96% and 81% at less than 0.18 μmol / mL, 9 respectively. The ID50 (50% inhibition dose) values were 0.03 μmol / mL 0.008 μmol / mL and 0.010 μmol / mol, respectively. These compounds were assayed with activated Trp-P-1. Compound 2 showed suppressive effect of SOS-inducing activity of activated Trp-P-1 but compounds 1 and 3 did not.

Keywords: salvia miltiorrhiza bunge, diterpenoid, tanshinone, sos response, umu test, antimutagen


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