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KMID : 1161420120150010024
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Journal of Medicinal Food
2012 Volume.15 No. 1 p.24 ~ p.32
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The Hexane Extract of Saussurea lappa and Its Active Principle, Dehydrocostus Lactone, Inhibit Prostate Cancer Cell Migration
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Kim Eun-Ji
Hong Ji-Eun
Lim Soon-Sung
Kwon Gyoo-Taik
Kim Jong-Dai
Kim Jong-Sang
Lee Ki-Won
Park Jung-Han-Yoon
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Abstract
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Saussurea lappa has been used in Chinese traditional medicine for the treatment of abdominal pain, tenesmus, nausea, and cancer; previous studies have shown that S. lappa also induces G2 growth arrest and apoptosis in gastric cancer cells. In this study, we investigated the effects of hexane extracts of S. lappa (HESLs) on the migration of DU145 and TRAMP-C2 prostate cancer cells. DU145 and TRAMP-C2 cells were cultured in the presence of 0?4?μg/mL HESL with or without 10?ng/mL epidermal growth factor (EGF). HESL inhibited the basal and EGF-induced migration of prostate cancer cells in a dose-dependent manner, whereas HESL did not influence the viability of these cancer cells under the conditions used in this study. Active fractions of HESL were separated via column chromatography, and the structure of the active principle was determined using 1H and 13C nuclear magnetic resonance spectroscopy. The active compound, dehydrocostus lactone (DHCL), in fraction 7 dose-dependently inhibited the basal and EGF-induced migration of prostate cancer cells. HESL and DHCL reduced matrix metalloproteinase (MMP)-9 and tissue inhibitor of metalloproteinase (TIMP)-1 secretion but increased TIMP-2 levels in both the absence and presence of EGF. Our results demonstrate that the inhibition of MMP-9 secretion and the stimulation of TIMP-2 secretion contribute to reduced migration of DU145 cells treated with HESL and DHCL. These results indicate that HESL containing its active principle, DHCL, has potential as an antimetastatic agent for the treatment of prostate cancer.
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KEYWORD
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dehydrocostus lactone, matrix metalloproteinase, migration, prostate cancer cells, Saussurea lappa
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