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Table of Contents
Vol. 55, No. 3, 2009
Issue release date: May 2009
Section title: Pharmacology
Chemotherapy 2009;55:189–196
(DOI:10.1159/000216836)

Antifungal Activity of Black Tea Polyphenols (Catechins and Theaflavins) against Candida Species

Sitheeque M.A.M. · Panagoda G.J. · Yau J. · Amarakoon A.M.T. · Udagama U.R.N. · Samaranayake L.P.
aFaculty of Dental Sciences, University of Peradeniya, Peradeniya, and bTea Research Institute of Sri Lanka, Talawakele, Sri Lanka; cOral Biosciences, Faculty of Dentistry, University of Hong Kong, Hong Kong, SAR, China

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Article / Publication Details

First-Page Preview
Abstract of Pharmacology

Received: 7/15/2008
Accepted: 2/2/2009
Published online: 5/5/2009

Number of Print Pages: 8
Number of Figures: 4
Number of Tables: 2

ISSN: 0009-3157 (Print)
eISSN: 1421-9794 (Online)

For additional information: http://www.karger.com/CHE

Abstract

Background/Aims: The polyphenols catechins and theaflavins in black tea have been shown to possess many medicinal properties, including anticancer activity and some antifungal characteristics, but there have been few studies of their anti-Candida activity. In this paper we report the results of our study of the anti-Candida activity of tea polyphenols. Methods: The effects of 4 different concentrations of catechins and theaflavins were evaluated on 5 isolates each of 5 Candida species employing an agar diffusion growth inhibition assay. The minimum inhibitory concentration (MIC) of the polyphenols against C. albicans was determined. The post-antifungal effect (PAFE) of the polyphenols for C. albicans was investigated. C. albicans cells exposed to polyphenols were studied using a scanning electron microscope (SEM). Results: Both polyphenols showed anti-Candida activity against all tested Candida species and demonstrated a MIC of 6.25 mg/ml for C. albicans. C. glabrata was found to be the most sensitive species followed by C. parapsilosis, C. albicans, C. krusei and C. tropicalis (p < 0.05 for all). Significant intraspecies variations in sensitivity were noted among C. parapsilosis and C. tropicalis (p < 0.001) for both polyphenols. Theaflavins displayed standard PAFE while catechins showed a paradoxical PAFE with all isolates of C. albicans. SEM revealed considerable cell wall damage of C. albicans cells exposed to the polyphenols. Conclusion: The study reveals for the first time the anti-Candida properties of black tea polyphenols that may find therapeutic applications in future.


Article / Publication Details

First-Page Preview
Abstract of Pharmacology

Received: 7/15/2008
Accepted: 2/2/2009
Published online: 5/5/2009

Number of Print Pages: 8
Number of Figures: 4
Number of Tables: 2

ISSN: 0009-3157 (Print)
eISSN: 1421-9794 (Online)

For additional information: http://www.karger.com/CHE


Copyright / Drug Dosage

Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher or, in the case of photocopying, direct payment of a specified fee to the Copyright Clearance Center.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in goverment regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

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    External Resources

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