Fig. 1.

Effect of APGP on thymic involution in aged mice. (A) Thymi were dissected from old (17 mo) and young (2 mo) mice administered either APGP or PSK, and photographs were taken with a digital camera. (B) The area of each dissected thymus was measured by a ruler. (C) The weight of each dissected thymus was measured by an electronic scale. Data are presented as the means ± SD of one biological experiment performed with six technical replicates (n = 6). *p < 0.05, **p < 0.01 compared to a control group. APGP, acidic-polysaccharide-linked glycopeptide; PSK, polysaccharide-K; SD, standard deviation.