The immune system may play an important role in aging and the changes in the immune status are associated with treatment of various immunomodulators. This study examined the effects of β-glucans isolated from mushroom fungi, Coriolus versicolor on macrophages functions in young (8-weeks-old) and aged (82-weeks-old) male C57BL/6 mice. When peritoneal macrophages were treated with various concentrations of β-glucan (1-100 g/ml) for 24 hrs, tumoricidal activity, NO production and phagocytic activity were significantly increased in the young mice, whereas there are no effects in the aged mice. These results suggest that β-glucans has differential effects on the macrophage functions in young and aged mice and age nutrition might need to be considered to select proper immunomodulator. In addition, β-glucan could be used clinically for the treatment of diseases such as cancer therapy in the young.
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