TY - JOUR T1 - Yeast-derived Beta-(1-3),(1-6)-<span class="sc">d</span>-glucan Induces Up-regulation of CD86 on Dectin-1<sup>-positive</sup> Human B-Lymphoma Cell Lines JF - Anticancer Research JO - Anticancer Res SP - 4195 LP - 4199 VL - 31 IS - 12 AU - ULF HARNACK AU - UTE KELLERMANN AU - GABRIELE PECHER Y1 - 2011/12/01 UR - http://ar.iiarjournals.org/content/31/12/4195.abstract N2 - Background: The knowledge of direct effects of β-glucans on tumor cells is limited. This study evaluated the impact of a soluble yeast-derived beta-(1-3),(1-6)-d-glucan, containing a fraction of aggregated sugar polymers, on viability, proliferation and expression of CD86 of the human B-cell lymphoma cell lines Daudi and Raji. Materials and Methods: Proliferation of carboxyfluorescein diacetate succinimidyl ester (CFSE)-stained cell lines was determined by measuring depletion of the dye and cell death was quantified by staining with propidium iodide, both by flow cytometry. Surface expression of CD86 and the beta-glucan receptors dectin-1 and complement receptor 3 (CR3) was assessed by flow cytometry. Results: Exposure to the carbohydrate increased the expression of CD86 on both dectin-1+CR3− cell lines, whereas proliferation and viability of the cells were not affected. Conclusion: Yeast-derived beta-glucan lacks cytotoxic effects towards B-lymphoma cells but up-regulation of CD86 suggests maturation of the cells via dectin-1 by the carbohydrate. ER -