Short-communication: study of fatty acid metabolites in microbial conjugated fatty acids-enrichment of milk and discovery of additional undescribed conjugated linolenic acid isomers

Ana Luiza Fontes, Bruna Neves, Tiago Conde, Daniela Couto, Lígia Leão Pimentel, Luis Miguel Rodríguez-Alcalá*, M. Rosário Domingues, Ana Maria Gomes

*Autor correspondente para este trabalho

Resultado de pesquisarevisão de pares

17 Transferências (Pure)

Resumo

Microbially enriched food in conjugated linoleic (CLA) and conjugated linolenic (CLNA) acids is intensively studied nowadays. The conversion of linoleic (LA) and α-linolenic acids (α-LNA) into these compounds may involve different fatty acid (FA) intermediates. This research aimed to investigate potential FA byproducts in milk during microbial CLA/CLNA-enrichment using Bifidobacterium breve DSM 20091. Milk fermented with pure α-LNA showed a decrease in free myristic acid, while pure LA led to an increase in free stearic acid. No additional FA compounds were found alongside CLA/CLNA isomers. The strain produced several CLA isomers from LA, but only when administered alone. Nonetheless, when α-LNA was assayed, additional CLNA isomers, never reported before for bifidobacteria, were observed. In conclusion, except for stearic acid in the presence of LA, no side-FA metabolites were released during milk microbial CLA/CLNA-enrichment. Results suggest either CLA/CLNA production occurs in one single-step or intermediates biotransformation is very fast.
Idioma originalEnglish
Número do artigo137276
Número de páginas17
RevistaFood Chemistry
Volume432
DOIs
Estado da publicaçãoPublicado - 30 jan. 2024

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