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        Anti-cariogenic Characteristics of Rubusoside

        Jeesoo Kim,Thi Thanh Hanh Nguyen,Juhui Jin,Iis Septiana,Gyu-Min Son,Gang-Hee Lee,You-Jin Jung,Dilshad Qureshi,목일균,Kunal Pal,Soo-Yeon Yang,Seong-Bo Kim,Doman Kim 한국생물공학회 2019 Biotechnology and Bioprocess Engineering Vol.24 No.2

        Streptococcus mutans plays an important role in the development of dental caries in humans by synthesizing adhesive insoluble glucans from sucrose by mutansucrase activity. To explore the anti-cariogenic characteristics of rubusoside (Ru), a natural sweetener component in Rubus suavissimus S. Lee (Rosaceae), we investigated the inhibitory effect of Ru against the activity of mutansucrase and the growth of Streptococcus mutans. Ru (50 mM) showed 97% inhibitory activity against 0.1 U/mL mutansucrase of S. mutans with 500 mM sucrose. It showed competitive inhibition with a Ki value of 1.1 ± 0.2 mM and IC50 of 2.3 mM. Its inhibition activity was due to hydrophobic and hydrogen bonding interactions based on molecular docking analysis. Ru inhibited the growth of S. mutans as a bacteriostatic agent, with MIC and MBC values of 6 mM and 8 mM, respectively. In addition, Ru showed synergistic anti-bacterial activity when it was combined with curcumin. Therefore, Ru is a natural anti-cariogenic agent with antimutansucrase activity and antimicrobial activity against S. mutans.

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