Polysaccharides from Tetrastigma hemsleyanum Diels et Gilg: Extraction optimization, structural characterizations, antioxidant and antihyperlipidemic activities in hyperlipidemic mice.

In this study, a novel polysaccharide TDGP-3 from Tetrastigma hemsleyanum Diels et Gilg was extracted by enzymolysis-ultrasonic assisted extraction (EUAE) method and its antioxidant and hypolipidemic activities were evaluated. With a molecular weight of 3.31 × 105 Da, TDGP-3 was composed of 1,4-Glcp, 1,4-Glap and 1,3,6-Manp linkage in the main chain. TDGP-3 showed potential effects on relieving hyperlipidemia and preventing oxidative stress, reflecting by regulating blood lipid levels (TC, TG, HDL-C and LDL-C), decreasing the contents of MDA in liver, restoring the activities of hepatic antioxidant enzymes (SOD, GSH-Px and CAT). The results clearly indicated that the TDGP-3 possesses a potent hypolipidemic activity and might be used for hyperlipidaemia treatment.