Impact of the biomass pretreatment and simulated gastrointestinal digestion on the digestibility and antioxidant activity of microalgae Chlorella vulgaris and Tetraselmis chuii
2024
Paterson, Samuel | Majchrzak, Marta | Alexandru, Denisa | Di Bella, Serena | Fernández-Tomé, Samuel | Arranz, Elena | Fuente, Miguel Ángel de la | Gómez-Cortés, Pilar | Hernández-Ledesma, Blanca | Ministerio de Ciencia, Innovación y Universidades (España) | Agencia Estatal de Investigación (España) | Ministerio de Ciencia e Innovación (España) | Comunidad de Madrid | Università degli Studi di Palermo | Universidad Complutense de Madrid
Chlorella vulgaris and Tetraselmis chuii are two microalgae species already marketed because of their richness in high-value and health-beneficial compounds. Previous studies have demonstrated the biological properties of compounds isolated from both microalgae, although data are not yet available on the impact that pre-treatment and gastrointestinal digestion could exert on these properties. The aim of the present study was to analyze the impact of the biomass pre-treatment (freeze/thaw cycles plus ultrasounds) and simulated gastrointestinal digestion in the bioaccessibility and in vitro antioxidant activity (ABTS, ORAC, Q-FRAP, Q-DPPH) of the released digests. The cell wall from microalgae were susceptible to the pre-treatment and the action of saliva and gastric enzymes, releasing bioactive peptides and phenolic compounds that contributed to the potent antioxidant activity of digests through their radical scavenging and iron reduction capacities. Our findings suggest the potential of these microalgae against oxidative stress-associated diseases at both, intestinal and systemic level.
Show more [+] Less [-]This research was funded by the Spanish Ministry of Science and Innovation, grant number PID2021-122989OB-I00. E. Arranz and S. Fernández-Tomé thank to the ALIMNOVA UCM Research Group Ref: 951505 (Grant: GFRN32-23). S. Paterson gratefully acknowledges the Autonomous Community of Madrid for his predoctoral contract PIPF-2022/BIO-24996. S. Di Bella thanks to Universitá degli studi di Palermo (Borsa di studio per Mobilità Internazionale dell'Ateneo A.A. 2023/24 -Traineeship autonomo)
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