Figure 1.

Cytotoxic effect of a water-soluble polysaccharide extract from Inonotus taiwanensis (WSPIS) on human monocytic leukemia cell lines. THP-1 and U937 leukemia cells were treated with WSPIS (100, 250, and 500 µg/mL) for 24 and 48 h. Cell viability was determined by the trypan blue exclusion assay. The results are expressed as mean ± SD of three independent experiments. *, ** and *** denote the data that are significantly different from control at p < 0.05, p < 0.01 and p < 0.001, respectively.