Figure 1.

Effect of hyperforin on embryonic stem ( ES ) cell and fibroblast viability. Employing mouse ES cells (a) and NIH/3T3 cells (b) were treated with hyperforin at indicated concentrations for 7 days. Cell viability was measured by CellTiter‐Glo luminescent cell viability assay. Cell cultures exposed to 0 μm drug were considered to be 100% viable. Cell viability of each drug‐treated sample was presented as a percentage of viability of cultures treated with 0 μm drug. Data are mean ± SEM of results from at least three independent experiments. *P < 0.05, compared to 0 μm.