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Ski‑novel protein (SnoN) is a proto‑oncogene that belongs to the Ski protein family and is involved in regulating processes such as cell proliferation and apoptosis. To investigate the role of SnoN in the proliferation and apoptosis of HepG2 cells, we downregulated its expression by the use of small interfering RNA (siRNA). Three fragments predicted to have RNAi capacity were designed and synthesized as the target siRNAs (siRNA‑A, ‑B and ‑C). Following transfection, inhibition efficiency was detected by reverse transcription PCR (RT‑PCR) and western blot analysis. The siRNA with the optimal inhibition efficiency was used for the cell proliferation and apoptosis analysis. Cell proliferation was analyzed by the Cell Counting Kit‑8 (CCK‑8) and cell apoptosis was investigated by flow cytometry. In our study, all three siRNAs efficiently inhibited SnoN expression, and siRNA‑C demonstrated the optimal inhibition efficiency. We found that following downregulation of SnoN expression, HepG2 cell proliferation was significantly inhibited (P&lt;0.05), while HepG2 cell apoptosis was significantly increased (P&lt;0.05). SnoN‑specific siRNA is capable of effectively inhibiting the expression of SnoN in human HepG2 cells, and the downregulation of SnoN expression induces growth inhibition and apoptosis.

Effects of the downregulation of SnoN expression on HepG2 cell proliferation and apoptosis