Extracellular HSP70/HSP70-PCs promote RhoA expression and lamellipodia formation. (A) Effect of extracellular HSP70/HSP70-PCs on the expression of RhoA, as evaluated by reverse transcription-quantitative polymerase chain reaction. (B) Effect of extracellular HSP70/HSP70-PCs on the expression of RhoA, as evaluated by western blotting. (C) The relative expression of RhoA by western blotting. (D) Lamellipodia formation was visualized by F-actin phalloidin staining upon extracellular HSP70/HSP70-PCs treatment. Cells were photographed with an Olympus IX71 digital inverted microscope. Magnification, ×40. **P<0.01. HSP70, heat shock protein 70; PCs, peptide complexes; mRNA, messenger RNA; RhoA, Ras homolog family member A; GAPDH, glyceraldehyde 3-phosphate dehydrogenase.