Purification, characterization, and antioxidant ability of polysaccharides from Phascolosoma esculentas

The polysaccharide was extracted from Phascolosoma esculenta (PEP). Two purified polysaccharides (PEP‐1 and PEP‐2) were obtained by the column chromatography separation method. The molecular weights of PEP‐1 and PEP‐2 were 33.6 and 5.7 × 103 kDa, respectively. PEP‐1 and PEP‐2 had the same monosaccharides composition, but their molar ratios varied. The in vitro antioxidant activity of the PEP, PEP‐1, and PEP‐2 were investigated by scavenging free radicals like 3‐ethylbenzoth‐iazoline‐6‐sulfonic acid (ABTS), •OH, and 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH). Additionally, the in vivo antioxidant activity of PEP‐1 was examined using the Caenorhabditis elegans (C. elegans) organism. Results showed that PEP‐1 was much more effective than PEP and PEP‐2 at scavenging DPPH, •OH, and ABTS radicals. Additionally, PEP‐1 strengthened C. elegans' ability to endure oxidative stress. PEP‐1 possessed the in vivo antioxidant capacity, including the reactive oxygen species (ROS) content reducing, and protective effect on antioxidant enzyme activities in C. elegans. In summary, PEP, PEP‐1, and PEP‐2 might have the potential to develop as functional foods and clinical medications. The polysaccharide was extracted from Phascolosoma esculenta. The characterization of polysaccharides were investigated. The polysaccharide from Phascolosoma esculenta possessed in vitro and in vivo antioxidant activities.