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Cancer Biol Ther. 2009 Feb;8(3):218-25. Epub 2009 Feb 3.

Therapeutic potential of various beta-glucan sources in conjunction with anti-tumor monoclonal antibody in cancer therapy.

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Tumor Immunobiology Program, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202 , USA.


Combined beta-glucan with anti-tumor mAb therapy has demonstrated therapeutic efficacy in murine tumor models. The current study was designed to compare the therapeutic efficacy of various sources of beta-glucans. Our studies demonstrated that yeast beta-glucan, in combination with anti-tumor mAb, resulted in significantly smaller tumor burdens and achieved enhanced long-term survival compared to mAb alone or beta-glucan extracts from mushrooms. Further studies indicated that yeast beta-glucan particle was superior to mushroom extracts in inducing cytokine secretion, particularly IL-12 production in dendritic cells (DCs). In addition, results showed that cytokine production was markedly decreased in MyD88-deficient macrophages and DCs but not in complement receptor 3 (CR3)-deficient mice. Our data suggest that yeast beta-glucan demonstrates much stronger adjuvant activity compared to mushroom beta-glucan extracts in tumor therapy. This effect of yeast beta-glucan may be in part ascribed to the cytokine secretion by DCs and macrophages and bioavailability of active beta-glucan moiety.

[Indexed for MEDLINE]

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