Abstract
The study was to optimize the separation procedures, characterize the galactoglycerolipids and explore their anti-inflammatory activities. Two monogalactosyldiacylglycerols (MGDGs) and three digalactosyldiacylglycerols (DGDGs) from Perilla frutescens (L.) Britton were obtained through one-step silica gel column chromatography and preparative high-performance liquid chromatography with evaporative light scattering detection (HPLC-ELSD). The presence of additional MGDG (1-O-9Z,12Z,15Z-octadecatrienoyl-2-O-7Z,10Z,13Z-hexadecatrienoyl-3-O-(β-D-galactopyranosyl)-sn-glycerol) and DGDG (1-O-9Z,12Z-octadecadienoyl-2-O-9Z,12Z,15Z-octadecatrienoyl-3-O-(β-D-galactopyranosyl-(1'→6'')-α-D-galactopyranosyl)-sn-glycerol) was concluded for the first time in perilla, by liquid chromatography-mass spectrometry (LC-MS) and nuclear magnetic resonance (NMR). In lipopolysaccharide (LPS)-induced RAW264.7 cells, five galactoglycerolipids exhibited good inhibitory activities against nitric oxide (NO) production and inducible nitric oxide synthase (iNOS) gene expression in a dose-dependent manner, suggesting that fatty acid chain length and unsaturation degree affected their anti-inflammatory activities.
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