Journal List > Immune Netw > v.2(2) > 1033589

Maeng, Lee, Cho, and Hong: Immunomodulating and Antitumor Activities of Exo-secretion from Phellinus linteus



The chemical characteristics of the exo-secretion from Phellinus linteus (referred to as exo-secretion) including the compositions of amino acids and monosaccharides were investigated. In addition, cytotoxicity of the exo-secretion on 5 tumor cell lines derived from human cancers and its antitumor activity against ascitic sarcoma-180 cells were examined.


The antitumor activity of exo-secretion from Phellinus linteus was determined by measuring parameters including tumor weight, life span of mice, chemotatic activity of leukocytes, counts of immune cells, and activity of cytokines.


The exo-secretion from Phellinus linteus showed no direct cytotoxicity to the five tumor cell lines tested, but it had a strong antitumor activity against sarcoma-180 cells in ICR mice as measured by tumor weight and life span of mice. The exo-secretion stimulated the chemotaxis of leukocytes and production of immune cells and cytokines.


These results suggest that the exo- secretion from Phellinus linteus do not act as a direct cytotoxic substance to cancer cells but as an immunomodulator.

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