Figure 2.

Effect of Mumijo extract on Aβ25–35-induced cell toxicity. Neurons have been treated with 1 μM of Aβ25–35 for 5 days. During this period the viability of the cells dropped from 100% (hatched bar) to 28% (solid black bar) if no Mumijo extract had been added. However, if the cultures had been pre-incubated with increasing concentrations of Mumijo extract (3–100 μg/ml) the β25–35-induced cell toxicity is reduced. Control values are set to 100% (hatched bar); n = 10. The means ± SEM are given. *P < .001 [versus controls (plus Aβ 25–35)]. Cell viability was determined applying the MTT assay procedure.