(A) The efficiency of knockdown and overexpression of Hsp. HeLa cells were transiently transfected with Hsp70 plasmid or Hsp70 siRNA for 72 h. Lysates were subjected to Western blot analysis with anti-Hsp70 antibody. Values are the mean±SE of three independent experiments. *P<0.05, **P<0.01 (vs control). 