HSPD1 and ovarian cancer: To explore the mechanism that si-HSP60 inhibited ovarian cancer cell proliferation, the apoptosis was measured by FACS between si-HSP60-ransfected TOV-21G and control TOV-21G that were stained with PI and annexin V. The results showed a higher ratio of cell apoptosis in the si-HSP60 transfection group compared to the control group (Figures 3(a) and 3(b)).