Abstract
Saccharomyces boulardii (S. boulardii) is a probiotic and is widely used to improve the nutritional and functional value of food. This study aimed to compare the probiotic properties of S. boulardii and Saccharomyces cerevisiae. A series of in vitro probiotic experiments was performed, including simulated gastrointestinal digestion, bile salt tolerance, hydrophobicity, self-aggregation, and antioxidant and antibacterial properties. Self-aggregation and hydrophobic properties of S. boulardii were relatively poor, but they showed high tolerance, antioxidant properties, and broad antibacterial properties. In addition, non-targeted metabolomics was used to comprehensively analyze the active metabolites of S. boulardii and the metabolic differences between S. boulardii and S. cerevisiae were compared. Saccharomyces boulardii produced many bioactive metabolites, which generally showed antioxidant, antibacterial, antitumor, anti-inflammatory, and other properties. In contrast to S. cerevisiae, S. boulardii produced phenyllactic acid and 2-hydroxyisocaproic acid. There were also significant differences in their metabolic pathways. These results may be of great significance in the medical and food industries and provide a basis for understanding the metabolism of S. boulardii. It also shows that metabolomics is an effective and novel method for screening microbial functional metabolites and identifying functional differences between similar microorganisms.
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Acknowledgements
We thank the College of Bioengineering, Sichuan University of Science & Engineering and Wuliangye Yibin Co, Ltd., for their assistance, and we also would like to thank Editage (www.editage.cn) for English language editing.
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This work was financially supported by the solid-state Fermentation Resource Utilization Key Laboratory of Sichuan Province (No. 2018GTY002) and The Industry-Academia Collaborative Project of Wuliangye, China (CXY2020ZR001).
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J. Fu conceived the research. J. Cai and G. Zhang analyzed the data, X. Wen contributed by providing reagents or analytical tools, and Z. Qiao, Z. An, and J. Zheng provided research funding. J. Liu and L. Li designed and supervised the experimental work as indicated in the parentheses. J. Fu and L. Li wrote the manuscript. All authors read critically and approved the manuscript.
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Fu, J., Liu, J., Wen, X. et al. Unique Probiotic Properties and Bioactive Metabolites of Saccharomyces boulardii. Probiotics & Antimicro. Prot. 15, 967–982 (2023). https://doi.org/10.1007/s12602-022-09953-1
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DOI: https://doi.org/10.1007/s12602-022-09953-1