Table 1.

The effect of CAE treatment on the viability of differentiated PC12 and IMR32 cells.

Group		CAE concentration (μg/mL)
		0	25	50	100
		Cell viability (%)
PC 12	24 h	100.3 ± 6.2	119.3 ± 4.9*	90.5 ± 3.5**	85.5 ± 0.5**
IMR32		102.2 ± 1.6	109.2 ± 2.4*	112.4 ± 2.5*	121.2 ± 2.6*
PC 12	48 h	100.2 ± 5.9	101.4 ± 4.5	96.9 ± 0.4**	96.9 ± 6.2**
IMR32		103.3 ± 3.1	109.1 ± 2.2	120.8 ± 4.1*	133.3 ± 3.1*

*P < 0.05 compared to control; increase in cell viability. **P < 0.05 compared to control, decrease in cell viability.

CAE: Centella asiatica 20% ethanol extract.