Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Anti-cariogenic Effects of S. cerevisiae and S. boulardii in S. mutans–C. albicans Cross-Kingdom In Vitro Model

Version 1 : Received: 11 January 2024 / Approved: 11 January 2024 / Online: 11 January 2024 (08:04:48 CET)

A peer-reviewed article of this Preprint also exists.

Yousif, D.; Wu, Y.; Gonzales, A.A.; Mathieu, C.; Zeng, Y.; Sample, L.; Terando, S.; Li, T.; Xiao, J. Anti-Cariogenic Effects of S. cerevisiae and S. boulardii in S. mutans–C. albicans Cross-Kingdom In Vitro Models. Pharmaceutics 2024, 16, 215. Yousif, D.; Wu, Y.; Gonzales, A.A.; Mathieu, C.; Zeng, Y.; Sample, L.; Terando, S.; Li, T.; Xiao, J. Anti-Cariogenic Effects of S. cerevisiae and S. boulardii in S. mutans–C. albicans Cross-Kingdom In Vitro Models. Pharmaceutics 2024, 16, 215.

Abstract

Despite well-documented health benefits of probiotics Saccharomyces, its application in oral health has not been comprehensively assessed. Dental caries is a transmissible disease initiated by acid production of cariogenic bacteria and yeast, such as Streptococcus mutans and Candida albicans, on tooth enamel and followed by subsequent enamel demineralization. Here, we investigated the effect of two Saccharomyces strains (Saccharomyces boulardii, Saccharomyces cerevisiae) on S. mutans-C. albicans cross-kingdom interactions using a cariogenic planktonic model. Viable cells, pH changes and gene expression were measured. S. cerevisiae and S. boulardii inhibited the growth of C. albicans either in dual-, or multi-species conditions. Saccharomyces also inhibited C. albicans hyphal formation. Furthermore, Saccharomyces reduced the acidity of the culture medium which usually plummeted below pH 5 when S. mutans and C. albicans were present in the model. The presence of Saccharomyces maintained the culture medium above 6 even after overnight incubation, demonstrating a protective potential against dental enamel demineralization. S. boulardii significantly downregulated S. mutans atpD and eno genes expression. Overall, our results shed light on a new promising candidate, Saccharomyces, for dental caries prevention due to its potential to create a less cariogenic environment marked by a neutral pH and reduced growth of C. albicans.

Keywords

Saccharomyces cerevisiae; Saccharomyces boulardii; Candida albicans; cross-kingdom interaction; pH; Dental caries

Subject

Biology and Life Sciences, Immunology and Microbiology

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