충치균에 대한 생리활성 생약성분의 분리 및 약효평가(1) 튜립나무잎의 항균성 성분과 안전성에 대하여

The Isolation and Evaluation of Bioactive Components from Crude Drugs against a Cariogenic Bacterium, Streptococcus mutans OMZ 176 (1) On the Antibacterial Component of the Leaves of Liriodendron tulipifera and Its Safety

The isolation and identification of an antibacterial component, from the leaves of Liriodendron tulipifera. K. Kotch against a cariogenic bacterium Streptococcus mutans OMZ 176, were carried out for developing of anticariogenic agents. The bioactive component was elucidated as beta-liriodenolide, which was isolated newly from the leaves of L. tulipifera. The minimal inhibitory concentration (MIC) of beta-liriodenolide was 100mcg/ml and the antibacterial activity was stronger than that of berberine. beta-Liriodenolide inhibited beta-lactamase activity, 50, 100 and 200mcM beta-liriodenolide did beta-lactamase activity as 0.7, 3.5 and 19.7%, respectively. The toxicity of beta-liriodenolide was not found with the method of photohemolysis.