Anti-inflammatory activity of pectic enzyme-treated pectin on lipopolysaccharide-induced RAW 264.7 cells

  • Cian-Song Huang
  • Qiao-Lin Li
  • Diana Lo Binus University
  • Yuh-Tai Wang
  • Ming-Chang Wu
Keywords: pectic enzyme-treated pectin, inflammation, lipopolysaccharide, RAW 264.7


The purpose of this study was to investigate the ability and pathway of the pectic enzyme-treated (PET) pectin to inhibit the inflammation of macrophage RAW 264.7 induced by lipopolysaccharide. Results showed that PET-pectin produced from 1% substrate and 48 h reaction time had the highest antioxidative activity, thus these parameters were used to produce PET-pectin used in this study. PET-pectin showed no cell cytotoxicity to normal macrophage RAW 264.7 and reduce the nitrite secretion from LPS-induced RAW 264.7 by 20%. Finally, the expression of cytokines, including NO synthase (iNOS), nitric oxide (NO), cyclooxygenase-2 (COX-2), nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and tumor necrosis factor (TNF-α) were analyzed by western blot. In the western blot method, it was found that iNOS, COX-2, NF-κB, TNF-α and other proteins that activated NO production had a downtrend. It was found that PET-pectin possess promising activity to mitigate the inflammatory response.