| 摘要 |
The present invention relates to a composition for use as an immunomodulator comprising small molecular weight components of less than 3000 daltons, and having the following properties: a) is extractable from bile of animals; b) is capable of stimulating monocytes and macrophages in vitro; c) is capable of modulating tumor necrosis factor production; d) contains no measurable IL-1a, IL-1b, TNF, IL-6, IL-8,IL-4, GM-CSF or IFN-gamma; e) has an anti-proliferative effect in a malignant mouse hybridoma cell line; f) shows no cytotoxicity to human peripheral blood mononuclear cells; and g) is not an endotoxin. The invention also relates to a method of preparing the composition and its use as an immunomodulator.
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