RT journal article
T1 Molecular Characterization and Anti-inflammatory Activity of Galactosylglycerides and Galactosylceramides from the Microalga Isochrysis galbana
A1 Reyes Jiménez, Carolina de los
A1 Ortega Agüera, María Jesús
A1 Rodríguez Luna, Azahara
A1 Talero, Elena
A1 Motilva, Virginia
A1 Zubía Mendoza, Eva
A2 Química Orgánica
K1 microalgae
K1 Isochrysis galbana
K1 galactosylglycerides
K1 MGDG
K1 DGDG
K1 galactosylceramides
K1 anti-inflammatory activity
K1 TNF-α inhibition
AB Isochrysis galbana is a marine microalga rich in PUFAs that is widely used as feed in aquaculture and more recently investigated for its potential in food applications and as source of bioactive compounds. In this study, the biomass obtained from cultures of I. galbana has been investigated to determine its content in glycosylglycerides and glycosylceramides. By using NMR, UPLC-MS/MS, and fatty acid profiles, the structures of ten monogalactosyldiacylglycerols (MGDGs 1−10) and nine digalactosyldiacylglycerols (DGDGs 11−19) have been established. Two distinctive features of the galactosylglycerides from I. galbana are the wide presence of highly unsaturated acyl chains derived from stearidonic acid (18:4Δ6Z,9Z,12Z,15Z) and octadecapentaenoic acid (18:5Δ3Z,6Z,9Z,12Z,15Z), as well as the unusual coexistence of αβ-DGDGs and ββ-DGDGs. Three new galactosylceramides, isogalbamides A-C (20−22), have also been isolated and characterized by NMR and MS/MS. These metabolites, which are the first galactosylceramides described from microalgae, derive from unprecedented tetraolefinic sphingoid bases. In anti-inflammatory assays, the MGDG and DGDG mixtures and the isolated DGDGs 11 and 12 showed significant activity as inhibitors of the production of the pro-inflammatory cytokine TNF-α in lipopolysaccharide-stimulated human THP-1 macrophages, while the galactosylceramides showed moderated activity.
PB ACS
SN 1520-5118
YR 2016
FD 2016-10-27
LK http://hdl.handle.net/10498/34728
UL http://hdl.handle.net/10498/34728
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 05-nov-2026