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In vitro inhibitory effect of Streblus asper leaf-extract on adhesion of Candida albicans to human buccal epithelial cells.

Taweechaisupapong S, Choopan T, Singhara S, Chatrchaiwiwatana S, Wongkham S

Department of Oral Diagnosis, Faculty of Dentistry, Khon Kaen University, Khon Kaen 40002, Thailand. suvi_taw@kku.ac.th

This in vitro study aimed at determining the effects of a sublethal concentration of Streblus asper Lour (Moraceae) leaf ethanolic extract on adherence of Candida albicans to human buccal epithelial cells (HBEC). The minimum concentration of Streblus asper leaf ethanolic extract (SAE) that significantly reduced adherence (P<0.05) after a 1-h exposure was 15.6 mg/ml. However, there was a significant reduction (P<0.05) of candidal adhesion to HBEC after 1-min exposure to 125 mg/ml of SAE. Pre-treatment of either Candida or HBEC, or both, with 125 mg/ml of SAE for 1h resulted in reduced adherence. SAE at concentrations of 125 and 250 mg/ml also showed 41 and 61% inhibition of germ tube formation, respectively, which might affect adherence. These findings indicate that the sublethal concentration of SAE may modulate candidal colonization of the oral mucosa thereby suppressing the invasive potential of the pathogen.

Published 13 December 2004 in J Ethnopharmacol, 96(1): 221-6.
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