Synthesis of EPA- and DHA-Enriched Structured Acylglycerols at the sn-2 Position Starting from Commercial Salmon Oil by Enzymatic Lipase Catalysis under Supercritical Conditions.

Dovale-Rosabal, Gretel; Rodríguez, Alicia; Espinosa, Alejandra; Barriga, Andrés.; Aubourg, Santiago, P

Keywords: salmon oil, maldi-tof, n-3 LCPUFA, EPA/DHA sn-2 position, immobilized lipase B, Candida antarctica (nonspecific), CO2 supercritical extraction, structured acylglycerols, intra–interesterification


There is consistent evidence that long-chain polyunsaturated fatty acids (LCPUFA) belonging to the n-3 series, i.e., eicosapentaenoic (20:5n-3, EPA) and docosahexaenoic (22:6n-3, DHA) acids, decrease the risk of heart, circulatory and inflammatory diseases. Furthermore, the bioavailability of such fatty acids has been shown to depend on their location in triacylglycerol (TG) molecules at the sn-2 position. Consequently, great attention has been accorded to the synthesis of structured acylglycerols (sAG), which include EPA or DHA at the sn-2 position. The aim of this work was to synthesize sAG starting from deodorized refined commercial salmon oil. For this, immobilized lipase B from Candida antarctica (nonspecific) was used as a catalyst for the intra–interesterification process under CO2 supercritical conditions (CO2SC). According to the CO2SC reaction time, three different fractions including sAG compounds were obtained. The location of EPA and DHA at the sn-2 position in the resulting glycerol backbone was identified by mass spectrometry (MALDI-TOF) analysis. In all fractions obtained, a marked decrease in the starting TG content was observed, while an increase in the DHA content at the sn-2 position was detected. The fraction obtained after the longest reaction time period (2 h) led to the highest yield of sn-2 position DHA in the resulting sAG molecule.

Más información

Título de la Revista: MOLECULES
Volumen: 26
Número: 11
Editorial: MDPI
Fecha de publicación: 2021
Página de inicio: 3094
Página final: 3111
Idioma: English
Financiamiento/Sponsor: FONDECYT, grant number 1181774

Notas: indexed within Scopus, SCIE (Web of Science), Reaxys, PubMed, PMC, MEDLINE, Embase, CaPlus / SciFinder, ISI Molecules. 2021; 26(11):3094.