Analysis of Herba Asari polysaccharides and their immunological activity

► The polysaccharide isolated from the Herba Asari root was totally fractionated. ► A glucan, an arabinogalactan and two xylogalacturonan fractions were obtained. ► The glucan and the pectin have the stimulation activity on both T- and B-cell. ► Neutral and acidic polysaccharides probably have different stimulatory mechanisms.