OBJECTIVETo study the proteomics of Pinellia pedatisecta Schott total protein on human ovarian cancer SKOV3 cells.

METHODSSKOV3 cells were in vitro cultured. The growth inhibition of SKOV3 cells in the logarithmic phase with different concentrations of Pinellia pedatisecta Schott (0, 0.05, 0.10, 0.20, 0.30, 0.40, and 0.50 mg/mL) at different time points (24, 48, 72, and 96 h) was analyzed by CCK-8 colorimetry. The total protein was extracted after adding 0.296 mg/mL Pinellia pedatisecta Schott protein for 48 h. The protein with differential expressions was screened out using two-dimensional gel electrophoresis (2-DE) and matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF-MS).

RESULTSThe protein of Pinellia pedatisecta Schott (at 0.10 - 0.50 mg/mL) could significantly inhibit the growth of SKOV3 cells in a time- and dose-dependent manner (P < 0.05, P < 0.01). After analyzed by 2-DE and MALDI-TOF-MS, 43 differential protein dots were successfully identified (21 up-regulated and 22 down-regulated), including alpha-enolase 1, eukaryotic initiation factor 3alpha, cyclophilin B, and so on.

CONCLUSIONSProtein of Pinellia pedatisecta Schott could significantly inhibit the growth of SKOV3 cells, and lead to the proteomics changes of SKOV3 cell strain. They might be correlated with its anti-tumor mechanisms.