Structural Elucidation and Antitumor Activity of Polysaccharide AMP-1 from Atractyloids macrocephalae K.

Structural Elucidation and Antitumor Activity of Polysaccharide AMP‐1 from Atractylodis macrocephalae K.

A polysaccharide named as AMP‐1 was isolated from the root of Atractylodis macrocephalae Koidz, and purified by ethanol fractionation and gel filtration. The homogeneity of AMP‐1 was determined by HPLC and capillary electrophoresis that gave a single peak. AMP‐1 is composed of galactose and mannose in a molar ratio of 1.0:1.9. Its molecular weight is 3.8 × 10³. The structure of ghycan was elucidated by IR, ¹H NMR, ¹³C NMR and methylation analysis, and on the basis of the results was suggested that AMP‐1 contain a backbone of β. (1–2)‐D‐galactose residues with branches of single β‐D‐mannose residue being substituted at the O‐6. Bioactivity assay of AMP‐1 showed that it could inhibit growth of Sarcoma 180 and Lewis pulmonary carcinoma implanted in mice.