Preparation and antioxidant activities of the polysaccharides from Boletus snicus

The polysaccharose( BSP80) was prepared from the fruiting bodies of Boletus snicus with boiling water and purified by ethanol precipitation.The molecular weight,monosaccharide composition and antioxidant activity of BSP80 was measured.The results showed that the main average molecular weight of BSP80 was about 53.73 ku with a small part of 4 ku components. BSP80 was rich in galactose,glucose and mannose. The galacturonic acid and glucuronic acid were detected and the arabinose was undetected. BSP80 had showed high reducing power and hydroxyl radical scavenging activity,and the IC50 value of hydroxyl radical scavenging was 398.21 μg / m L.Furthermore,BSP80 decreased the ROS generation of Hep G2 cell induced by H2O2 with promoting intracellular enzymatic activity of SOD,significantly.The activities were related to the concentration of BSP80.