Table 1.

Effect of treatment with Withania somnifera (WS) on SK-N-SH cell survival after 24 h with Aβ peptide (50 µg/ml) using lactate dehydrogenase (LDH) and XTT assays†

(Mean values with their standard errors of four or five separate experiments performed in triplicate at least in each group)

					Aβ (50 µg/ml) + WS (μg/ml)
	Control		Aβ (50 μg/ml)		WS-0·5		WS-1·0		WS-5·0
Assay	Mean	sem	Mean	sem	Mean	sem	Mean	sem	Mean	sem
LDH	100·0**	3·61	134·32	6·32	122·11	4·10	114·25**	3·79	109·28**	2·80
XTT	100·0**	4·98	42·31	6·08	62·17	7·32	69·03	13·75	71·87*	4·03

Mean value was significantly different from that of the Aβ group: * P < 0·05, ** P < 0·01.

† Results are expressed as percentage of control (taken as 100 %).