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Protein Hydrolysates from Salmon Heads and Cape Hake By-Products

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Resumo:Fish by-products can be converted into high-value-added products like fish protein hydrolysates (FPHs), which have high nutritional value and are rich in bioactive peptides with health benefits. This study aims to characterise FPHs derived from salmon heads (HPSs) and Cape hake trimmings (HPHs) using Alcalase for enzymatic hydrolysis and Subcritical Water Hydrolysis (SWH) as an alternative method. All hydrolysates demonstrated high protein content (70.4–88.7%), with the degree of hydrolysis (DH) ranging from 10.7 to 36.4%. The peptide profile of FPHs indicated the breakdown of proteins into small peptides. HPSs showed higher levels of glycine and proline, while HPHs had higher concentrations of glutamic acid, leucine, threonine, and phenylalanine. Similar elemental profiles were observed in both HPHs and HPSs, and the levels of Cd, Pb, and Hg were well below the legislated limits. Hydrolysates do not have a negative effect on cell metabolism and contribute to cell growth. HPSs and HPHs exhibited high 2,2′–azino-bis(3 ethylbenzthiazoline-6)-sulfonic acid (ABTS) radical scavenging activity, Cu2+ and Fe2+ chelating activities, and angiotensin-converting enzyme (ACE) inhibitory activity, with HPHs generally displaying higher activities. The α-amylase inhibition of both FPHs was relatively low. These results indicate that HPHs are a promising natural source of nutritional compounds and bioactive peptides, making them potential candidates for use as an ingredient in new food products or nutraceuticals. SWH at 250 °C is a viable alternative to enzymatic methods for producing FPHs from salmon heads with high antioxidant and chelating properties.
Autores principais:Pires, Carla
Outros Autores:Leitão, Matilde; Sapatinha, Maria; Gonçalves, Amparo; Oliveira, Helena; Nunes, Maria Leonor; Teixeira, Bárbara; Mendes, Rogério; Camacho, Carolina; Machado, Manuela; Pintado, Manuela; Ribeiro, Ana Rita; Vieira, Elsa F.; Delerue-Matos, Cristina; Lourenço, Helena Maria; Marques, António
Assunto:ACE antioxidant biochemical composition contaminants cytotoxicity enzymatic hydrolysis fish waste FPH SWH α-amylase inhibitory activities Food Science Microbiology Health(social science) Health Professions (miscellaneous) Plant Science
Ano:2024
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade Nova de Lisboa
Idioma:inglês
Origem:Repositório Institucional da UNL

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