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In Vitro Antifungal Activity of HTI Isolated from Oriental Medicine, Hyungbangjihwang-tang  

Sung, Woo-Sang (School of Life Sciences and Biotechnology, College of Natural Sciences, Kyungpook National University)
Seu, Young-Bae (School of Life Sciences and Biotechnology, College of Natural Sciences, Kyungpook National University)
Lee, Dong-Gun (School of Life Sciences and Biotechnology, College of Natural Sciences, Kyungpook National University)
Publication Information
Microbiology and Biotechnology Letters / v.37, no.3, 2009 , pp. 273-279 More about this Journal
Abstract
Hyungbangjihwang-Tang (HT), an Oriental herbal formula, has been known to play a role which helps to recover vigor of human in the Orient. In this study, antifungal substance (HTI) was purified from the ethyl-acetate extracts of HT by using $SiO_2$ column chromatography and HPLC, and the antifungal effects of HTI and its mode of action were investigated. By using a broth micro-dilution assay, the activity of HTI was evaluated against fungi. HTI showed antifungal activities without hemolytic effect against human erythrocytes. To confirm antifungal activity of HTI, we examined the accumulation of intracellular trehalose as stress response on toxic agents and effect on dimorphic transition in Candida albicans. The results demonstrated that HTI induced the accumulation of intracellular trehalose and exerted its antifungal effect by disrupting the mycelial forms. To understand its antifungal mode of action, cell cycle analysis was performed with C. albicans, and the results showed HTI arrested the cell cycle at the S phase in yeast. The present study indicates that HTI has considerable antifungal activity, deserving further investigation for clinical applications.
Keywords
Hyungbangjihwang-Tang; antifungal activity; Oriental medicine; Candida albicans;
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