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标题：Biological Activity of α-Thujaplicin, the Minor Component of Thujopsis dolabrata SIEB. et ZUCC. var. hondai MAKINO
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作者：Yasuhiro MORITA ; Eiko MATSUMURA ; Hiroshi TSUJIBO 等
期刊名称：Biological and Pharmaceutical Bulletin
印刷版ISSN：0918-6158
电子版ISSN：1347-5215
出版年度：2001
卷号：24
期号：6
页码：607-611
DOI：10.1248/bpb.24.607
出版社：The Pharmaceutical Society of Japan
摘要：α-Thujaplicin, a minor component of Thujopsis dolabrata SIEB. Et ZUCC. Var. hondai MAKINO, which was synthesized, showed the antibacterial activity, phytogrowth-inhibitory effect, inhibition of carboxypeptidase A and cytotoxic effect. Antibacterial activity of α-thujaplicin on Enterococcus faecalis IFO-12965 [minimum inhibitory concentration (MIC): 1.56 μg/ml] was higher than that of gentamicin (MIC: 6.25 μg/ml) used as a positive control. Inhibitory activity of α-thujaplicin on carboxypeptidase A [50% inhibitory concentration (IC₅₀): 3.24×10^-5M] was higher than that of 1,10-phenanthroline used as a positive control. α-Thujaplicin showed germination inhibition toward the seed of Echinochloa utilis Ohwi et Yabuno even at the low concentration of 10 ppm and its growth inhibitory effect was stronger than that of sodium 2,4-dichlorophenoxyacetate used as a standard. α-Thujaplicin at 1.25 μg/ml inhibited cell growth of human stomach cancer KATO-III by 86%, and Ehrlich’s ascites carcinoma by 87%, respectively. This compound even at the low concentration of 0.32 μg/ml also inhibited cell growth of the former by 66%, and the latter by 75%, respectively. The acute toxicity of α-thujaplicin [50% lethal dose (LD₅₀) value: 256 mg/kg] in mice was as strong as those of β-dolabrin (LD₅₀ value: 232 mg/kg) and γ-thujaplicin (LD₅₀ value: 277 mg/kg).
关键词：α-thujaplicin;antibacterial activity;phytogrowth-inhibitory effect;carboxypeptidase A;inhibition;cytotoxic activity