Effects of Lactobacillus salivarius WB21 combined with green tea catechins on dental caries, periodontitis, and oral malodor

Publication date: Available online 30 November 2018

Source: Archives of Oral Biology

Author(s): Takuya Higuchi, Nao Suzuki, Seigo Nakaya, Sami Omagari, Masahiro Yoneda, Takashi Hanioka, Takao Hirofuji

Abstract

Objective

To evaluate the combined use ofLactobacillus salivarius WB21 and (–)-epigallocatechin gallate (EGCg) for oral health maintenance.

Design

The effects ofL. salivarius WB21 on growth of Streptococcus mutans, the insoluble glucan produced by S. mutans, and on growth of Porphyromonas gingivalis were evaluated in vitro. In addition, the susceptibility of five oral pathogenic bacteria and L. salivarius WB21 to EGCg, the inhibiting effect of EGCg on methyl mercaptan, and the effects of L. salivarius WB21 and EGCg in combination on growth of P. gingivalis were examined.

Results

Lactobacillus salivarius WB21 showed concentration-dependent inhibition of the growth of S. mutans. Addition of L. salivarius WB21 inhibited production of the insoluble glucan by S. mutans (p < 0.001). A filtrate of L. salivarius WB21 culture solution inhibited growth of P. gingivalis (p < 0.001 vs. control), and this effect was enhanced when it was used in combination with EGCg (p < 0.001 vs. the addition of L. salivarius WB21). In addition, EGCg directly inhibited methyl mercaptan in a concentration-dependent manner (p < 0.001). Concerning bacterial susceptibility to EGCg, growth of P. gingivalis, Prevotella intermedia, and Fusobacterium nucleatum was inhibited at 2.5 mg/mL of EGCg, while that of L. salivarius WB21 was inhibited at 25 mg/mL EGCg.

Conclusions

Our results imply thatL. salivarius WB21 may be useful for controlling dental caries, periodontitis, and oral malodor. In addition, the effects of L. salivarius WB21 on periodontitis and oral malodor may be synergistically enhanced by use in combination with EGCg.

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