The efficacy of shRNA lentiviral particles transfection. A: Compared with LNCap cells transducted with the control GFP lentiviral particles (a) and shRNA-Periostin lentiviral particles(c) under common microscope, it could be seen that the effective rate of trusduction was more than 90% under fluorescence microscope(b and d). B: a:The Periostin protein expression was significantly reduced by shRNA-Periostin(P <0.05). b:The level of mRNA of Periostin after transducting shRNA-Periostin lentiviral particles was decreased by nearly 80% (P <0.05). Control GFP lentiviral particles had no influence on the Periostin expression of LNCap cells.