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ORIGINAL RESEARCH article
Front. Ind. Microbiol.
Sec. Food
Volume 3 - 2025 | doi: 10.3389/finmi.2025.1494334
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Probiotic yeasts are gaining significant attention due to their numerous advantages over traditional bacterial probiotics. Yeasts from winemaking environments may possess unique attributes that enhance their probiotic potential. In the present study, fourteen yeast strains were evaluated based on previous in vitro studies regarding their biosecurity and tolerance to gastrointestinal tract conditions. Biosafety was assessed using an in vivo invertebrate model, specifically Galleria mellonella, and potential in vitro properties, including enzyme production, antioxidant activity, antagonistic effects against enteropathogens, and cholesterol-lowering capabilities, were explored. Notably, all strains were deemed biosafe. Assessment of enzyme production revealed that all strains produced lipase and phytase, while six exhibited protease activity and five showed β-glucosidase activity. All isolates demonstrated tolerance to oxidative stress, DPPH radical scavenging (with a maximum value of 76.46%), and hydroxyl radical trapping (with a maximum value of 85.69% in Wickerhamomyces anomalus). Antimicrobial activity was also evaluated, with one strain producing siderophores. Furthermore, all strains exhibited catalase activity and produced short-chain organic acids in varying proportions, including acetic acid (with a maximum value of 1.436 g l -1 in W. anomalus), lactic acid (with a maximum value of 2.196 g l -1 in Pichia manshurica), and propionic acid (with a maximum value of 2.312 g l -1 in W. anomalus). All but one strain produced ethanol, with the highest value of 9.056 g l -1 observed in P. kudriavzevii. Importantly, all strains demonstrated the ability to reduce cholesterol levels in the medium to varying extents, with a reduction of up to 47.5% observed in P.kudriavzevii. These findings provide a robust foundation for future investigations into the potential probiotic applications of these yeasts.
Keywords: probiotic yeasts, biosecurity, Enzyme production, antioxidant activity, Antimicrobial Properties, Cholesterol-lowering
Received: 10 Sep 2024; Accepted: 17 Mar 2025.
Copyright: © 2025 Leiva Alaniz, Vergara Alvarez, Mestre Furlani, Vazquez, Mancha-Agresti and Maturano. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Yolanda Paola Maturano, Instituto de Biotecnología, Facultad de Ingeniería, Universidad Nacional de San Juan, San Juan, Argentina
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
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