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黄芪多糖-Ⅱ(简称APS-2)系葡萄糖聚合体,分子量12,300,其作用与黄芪多糖(APS)相似。小鼠和大鼠皆腹腔注射200mg/kg/day×3J小鼠实验表明APS-2有显著抑制肝、脾碱性RNase活力的作用,对血清RNase活力无作用,对酸性RNase无明显抑制。大鼠实验表明对肝碱性RNase只有104,000×g部分有显著抑制作用,而对10,000×g部分无影响。对肝碱性RNase的抑制因子具显著性增强作用。因此黄芪多糖的作用是通过增强RNase抑制因子和抑制RNase活力,使RNA的分解代谢降低,从而引起RNA累积和合成速率的降低。
Astragalus polysaccharide-II (APS-2) is a glucose polymer with a molecular weight of 12,300. Its action is similar to that of astragalus polysaccharide (APS). Both mice and rats were injected intraperitoneally with 200 mg/kg/day×3J mice. Experiments showed that APS-2 significantly inhibited the basic RNase activity of liver and spleen, had no effect on serum RNase activity, and had no significant inhibition on acidic RNase. Rat experiments showed that the liver alkaline RNase only had a significant inhibitory effect on the 104,000×g fraction, while it had no effect on the 10,000×g fraction. Hepatic alkaline RNase inhibitory factor has a significant enhancement. Therefore, the effect of astragalus polysaccharides is to reduce the catabolism of RNA by increasing RNase inhibitory factor and inhibiting RNase activity, thereby causing a decrease in the rate of RNA accumulation and synthesis.