In Vitro Bioaccessibility of Proteins and Bioactive Compounds of Wild and Cultivated Seaweeds from the Gulf of Saint Lawrence

Abstract

Despite the increased interest in macroalgae protein and fibers, little information is available on their bioaccessibility. The application of an in vitro gastrointestinal digestion model to study the degree of disintegration and release of proteins with expressed bioactivities from wild and cultivated Palmaria palmata and Saccharina latissima was proposed in this study. Macroalgae from the Gulf of St Lawrence, Canada, were submitted to digestive transit times of 2 (oral), 60 (gastric) and 120 (duodenal) minutes. Among wild samples, P. palmata had a higher percentage of disintegration, protein release and degree of hydrolysis than S. latissima. While the least digested sample, wild S. latissima, was the sample with the highest antioxidant activity (210 μmol TE g−1), the most digested sample, cultivated P. palmata, presented the highest ability to inhibit the angiotensin-converting enzyme (ACE), reaching 32.6 ± 1.2% at 3 mg mL−1. ACE inhibitory activity increased from 1 to 3 mg mL−1, but not at 5 mg mL−1. Wild samples from both species showed an ACE inhibition around 27.5%. Data suggested that the disintegration of the samples was influenced by their soluble and insoluble fiber contents. Further information on the bioaccessibility and bioactivity of these macroalgae should consider the characterization of digestion products other than protein, as well as the effects of previous product processing.

Biocosmetics Made with Saccharina latissima Fractions from Sustainable Treatment: Physicochemical and Thermorheological Features

“…The content of lower than in other brown seaweed extracts, particularly when enzymatic ex used, with values in the range of 20 to 40% (w/w) [41]. In another work, it wa S. latissima showed the highest antioxidant activity, in comparison with Palm The ORAC values were studied, and it was found that the values of the antiox ity for P. palmata were lower, in comparison with the values achieved by S. l behavior could have been due to the origin of the seaweeds; P. palmata was controlled tanks, while S. latissima was cultivated in a marine farm (on subm lines) [42].…”

“…The ORAC values were studied, and it was found that the values of the antioxidant capacity for P. palmata were lower, in comparison with the values achieved by S. latissima. This behavior could have been due to the origin of the seaweeds; P. palmata was cultivated in controlled tanks, while S. latissima was cultivated in a marine farm (on submerged longlines) [42].…”

Recent developments and challenges in algal protein and peptide extraction strategies, functional and technological properties, bioaccessibility, and commercial applications

“…The digestibility of seaweed proteins can vary depending on the species, seasonal variations, and the presence of other compounds (phenols, polysaccharides, dyes) (Vasconcelos et al., 2023). Heat treatment can effectively increase the bioavailability of protein obtained from the macroalgae species P. palmata without negatively impacting the content of essential amino acids (Maehre et al., 2016).…”

The sugar kelp Saccharina latissima II: Recent Advances in farming and applications

“…A rat study showed low digestibility of protein from S. latissima; however, the rats were fed whole S. latissima, and the digestibility was presumed to improve by using protein-enriched S. latissima extracts, potentially in combination with other high-quality protein sources (Juul et al 2022). Information about the bioavailability of protein from S. latissima is scarce, but a study of protein release in an in vitro digestion model showed a protein release of 52.7% after 120 min of duodenal digestion (Vasconcelos et al 2023).…”