ABSTRACT
Objective: To study the structure of Sophora alopecuroides polysaccarides (SAP) and its antitumor activity on CT26 transplanted tumor in mice. Methods: The structure was characterized by high-performance gel permeation chromatography (HPGPC), gas chromatography-mass spectrometer (GC-MS), infrared spectroscopy (IR), and nuclear magnetic resonance spectroscopy (NMR). And then the anticancer activity of CT26-bearing mice was investigated in vivo. Results: The results showed that SAP was consisted of D-mannopyranose and D-galactopyranose residues. The main chain of the galactomannan comprises β-(1,4)-linked D-mannopyranose residues, with branches of galactose, linked to the carbohydrate core through α-D-Gal (1,6) linkage. SAP could inhibit the tumor proliferation of CT26-bearing mice in a dose-dependent manner with inhibitory rate of 44.03% at high dose. Conclusion: Structure determination of SAP provides the theoretical basis for structure-activity relationship study. And it is expected to be further developed as a new antitumor drug with high efficiency and low toxicity.