SSD alone
increased expressions of several apoptosis- and autophagy-related
proteins. SGC-7901 (A) and SGC-7901/DDP cells (E) were treated with
SSD at the indicated concentrations for 48 h, and the expression levels
of proteins were detected by Western blot. Lanes of Western blot were
measured by the densitometer. Level of cleaved caspase 3 was normalized
to the level of pro-caspase 3 in SGC-7901 (B) and SGC-7901/DDP (F),
respectively. Expression of p-IκB α was normalized to
the expression of total IκB α in SGC-7901 (C) and SGC-7901/DDP
(G), respectively. Levels of LC3 B, IKK β, and NF-κB p65
were normalized to β-actin levels in SGC-7901 (D) and SGC-7901/DDP
(H), respectively. SGC-7901 (I) and SGC-7901/DDP (K) cells were treated
with SSD at a concentration of 2.5 and 5 μg/mL, respectively,
for the indicated time. Western blot images were quantified by densitometric
analysis, and levels of p62 were normalized to β-actin levels
in SGC-7901 (J) and SGC-7901/DDP (L), respectively. *p < 0.05, **p < 0.01, compared with control.