枸杞子经热水提取，用蛋白酶法和Ｓｅｖａｇ法除蛋白，透析纯化得到枸杞多糖（Ｉｖｃｉｕｍｂａｒｂａｒｕｍｐｏｌｙｓａｃｃｈａｒｉｄｅ，ＬＢＰ）．经ＵＶ扫描，ＬＢＰ未见核酸（２６０ｎｍ）和蛋白质（２８０ｎｍ）特征吸收峰，ＰＡＧＥ电泳和Ｂｒａｄｆｏｒｄ法测蛋白质含量，仅测到微量蛋白质及低于５ｍｇ／ｇ糖，红外分析显示有典型多糖吸收峰，对其活性作了分析，结果表明本室所提取的ＬＢＰ具有明显增强ＣｏｎＡ和ＬＰＳ诱导的小鼠脾脏淋巴细胞增殖作用，并对Ｓ－１８０荷瘤小鼠具明显的免疫抑瘤作用。 Gardenia jasminoides were extracted by hot water, protein was removed by protease method and Sevag method, purified by dialysis and purified to obtain IBP (Ibium barbarum polysaccharide) (LBP). After UV scanning, the characteristic absorption peaks of nucleic acid (260 nm) and protein (280 nm) were not detected in LBP. Protein content was measured by PAGE and Bradford method. Only trace amounts of protein and less than 5 mg/g sugar were detected. Infrared analysis showed typical polysaccharide absorption peaks. The activity was analyzed and the results showed that the LBP extracted from this chamber had significantly enhanced ConA and LPS-induced splenic lymphocyte proliferation in mice and had a significant immunosuppressive effect on S-180 tumor-bearing mice.