Assessing the Potential Biological Activities of Postbiotics Derived from Saccharomyces cerevisiae: An In Vitro Study

• Published in: Probiotics and antimicrobial proteins 2024-08, Vol.16 (4), p.1348-1364
• Main Authors: Hosseini, Hedayat, Abbasi, Amin, Sabahi, Sahar, Akrami, Sousan, Yousefi-Avarvand, Arshid
• Format: Article
• Language: English
• Subjects: Animals; Anti-Bacterial Agents - pharmacology; Apoptosis; Applied Microbiology; Bacteria - drug effects; Bacteria - genetics; Bacteria - metabolism; Bcl-x protein; Biomedical and Life Sciences; Cell Line, Tumor; Cell viability; Chemistry/Food Science; Cholesterol; Escherichia coli - drug effects; Fermentation; Flavonoids; Functional foods & nutraceuticals; Humans; Immune system; Life Sciences; Microbiology; Nutrition; pH effects; Phenolic compounds; Probiotics; Probiotics - pharmacology; Protein Science; PTEN protein; Saccharomyces cerevisiae; Yeast; α-Glucosidase
• ISSN: 1867-1306; 1867-1314; 1867-1314
• DOI: 10.1007/s12602-023-10117-y

A new biotherapeutic strategy involves the use of microbial bioactive substances (postbiotics) that exhibit optimum compatibility and intimate contact with the immune system of the host. This study was aimed at investigating the potential biological activities of postbiotics derived from Saccharomyces cerevisiae (PTCC 5269) (PSC) under in vitro circumstances. Based on the outcomes, the synthesized PSC possessing a high level of phenolic (102.46 ± 0.25 mg GAE/g) and flavonoid (19.87 ± 75.32 mg QE/g) content demonstrated significant radical scavenging activity (87.34 ± 0.56%); antibacterial action towards Listeria monocytogenes , Streptococcus mutans , Salmonella typhi , and Escherichia coli (in order of effectiveness) in both in vitro and food models (whole milk and ground meat); probiotics' growth-promoting activity in the fermentation medium; α-glucosidase enzyme-inhibiting and cholesterol-lowering properties in a concentration- and pH-dependent manner; reduction in the cell viability (with the significant IC 50 values of 34.27 and 23.58 μg/mL after 24 and 48 h, respectively); suppressed the initial (G0/G1) phase of the cell's division; induced apoptosis; and increased the expression of PTEN gene, while the IkB , RelA , and Bcl-XL genes indicated diminished expression in treated SW480 cancer cells. These multiple health-promoting functions of PSC can be extended to medical, biomedical, and food scopes, as novel biotherapeutic approaches, in order to design efficient and optimized functional food formulations or/and supplementary medications to use as adjuvant agents for preventing or/and treating chronic/acute disorders.