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Journal of Dental Research
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Gallotannins Inhibit Growth, Water-insoluble Glucan Synthesis, and Aggregation of Mutans Streptococci

C.D. Wu-Yuan

Department of Biological Sciences, Chicago State University, 95th Street and King Drive, Chicago, Illinois 60628

C.Y. Chen

c/o Dr. R. T. Wu, Graduate Institute of Microbiology and Immunology, National Yang-Ming Medical College, Taipei, Taiwan

R.T. Wu

c/o Dr. R. T. Wu, Graduate Institute of Microbiology and Immunology, National Yang-Ming Medical College, Taipei, Taiwan

During screening for anti-plaque agents of plant origin, ethanolic extracts from Melaphis chinensis (Bell), the Chinese Nutgall, exhibited strong inhibition of glucosyltransferase (GTF), in vitro adherence and glucan-induced agglutination of Streptococcus mutans 3209 and S. sobrinus B13. More than 91% inhibition of water-insoluble glucan synthesis from sucrose by GTF was noted at a concentration as low as 7.8 µg/mL. Bactericidal effects on other mutans streptococci, S. salivarius, and Actinomyces viscosus were also evident. Through chemical fractionation and analyses, along with bioassays, the active components were identified as gallotannins.

Journal of Dental Research, Vol. 67, No. 1, 51-55 (1988)
DOI: 10.1177/00220345880670011001
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