Neuroprotective effect of FK18 on cell viability tested by the MTS assay. (A) Viability of SH-SY5Y cells following exposure to different concentrations of glutamate for 24 h. (B) Viability of SH-SY5Y cells incubated with SCpep, FK18 and bFGF, at three different time points: 2 h before, simultaneously and 30 min after glutamate addition. The data are expressed as the mean ± SD. **P<0.01 vs. control group; ##P<0.01 vs. glutamate group. Con, control group treated with normal saline; Glu, glutamate; bFGF, basic fibroblast factor.