In vitro augmentation of natural killer activity and interferon-gamma production in murine spleen cells with Agaricus blazei fruiting body fractions
2005
Zhong, M.(Bizen Chemical Co. Ltd., Akaiwa, Okayama (Japan)) | Tai, A. | Yamamoto, I.
Aqueous extracts of the Agaricus blazei fruiting body prepared at different temperatures were fractionated by ethanol precipitation with various ethanol concentrations. The original aqueous extracts of A. blazei failed to stimulate natural killer (NK) cell activity in murine spleen cells in vitro, but the strongest effect was observed in a 30% ethanol-soluble-50% ethanol-insoluble fraction Prepared from the extract at 40 deg C (fraction A-50). Fraction A-50 also showed the strongest augmenting effect on interferon (IFN)-gamma production. This augmentation of NK activity and IFN-gamma production by fraction A-50 was completely abrogated by a heat treatment.
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