Fig. 1. Cell viability in rat astrocytes after treatment with SIN-1, propofol, and Intralipid at different concentrations. Values are mean ± SD of four experiments in duplicate. * Statistically significant  versus control , P < 0.001; ** statistically significant  versus 3 mm SIN-1,  P < 0.001; *** statistically significant  versus propofol + 3 mm SIN-1,  P < 0.001. SnMP = tin mesoporphyrin.