Comparison of inhibitory activity of bioactive molecules on the dextransucrase from Streptococcus mutans

Abstract

The effect of chitosan with different molecular weights and other natural substances on dextransucrase (DSase) activity from a representative oral pathogen Streptococcus mutans was elucidated. Among other bioactive substances, amino-monosaccharides such as glucosamine, mannosamine, and galactosamine exerted the enzyme inhibitory activity over 95 % of DSase. The specified hydrolysates derived from the hydrolysis of high molecular weight chitosan (HMWC) designated to CTSN, CTSN-P, CTSN-B, and CTSN-S with different molecular weights ranging from 3 to 8 kDa showed the similar inhibitory activity toward DSase. Also, the hyaluronic acid (MW 8.9 kDa), sulfated chitin, and amino-monosaccharides demonstrated the significant activity, CTSN, CTSN-P, CTSN-B, and CTSN-S are of potent bioactive substances that can be prepared in the cheapest way compared with other molecules tested available for antibacterial agent useful for human oral health.