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Objective:To knockdown the C-erbB2 gene in salivary gland adenoid cystic carcinoma SACC-83 cells using RNA interference,and determine the effect of silencing C-erbB2 on cell proliferation.Methods:C-erbB2-siRNA was transfected into SACC-83 cells.RT-PCR and immunohistochemistry were used to detect C-erbB2 expression in SACC-83 cells.Cell proliferation was measured by the MTT assay and gene knockdown was achieved by RNA interference.Apoptosis was analyzed by flow cytometry.Results:Compared with the control,C-erbB2 mRNA expression was decreased in the C-erbB2-siRNA transfection group,and immunohistochemical analysis indicated that C-erbB2 protein expression was decreased.After C-erbB2-siRNA was transfected for 48 h,absorbance at 570 nm (MTT)was 0.185±0.021 compared with 0.354±0.034,0.299±0.053,and 0.314±0.049 in the blank control,liposome control and negative control siRNA groups,respectively.The differences were statistically significant (P<0.05)between the C-erbB2-siRNA group and the control groups.Following the C-erbB2 knockdown,the percentage of apoptotic cells was 5.63%compared with 2.04%,2.85%,and 2.98%in the three control groups,respectively.Proliferation of SACC-83 cells was inhibited,and early apoptotic cells were increased.Conclusion: RNA interference can effectively silence C-erbB2 gene expression and inhibit growth of SACC-83 cells,which indicates the potential of targeting this gene as a novel gene therapy approach for the treatment of salivary gland adenoid cystic carcinoma.
Objective: To knockdown the C-erbB2 gene in salivary gland adenoid cystic carcinoma SACC-83 cells using RNA interference, and determine the effect of silencing C-erbB2 on cell proliferation. Methods: C-erbB2-siRNA was transfected into SACC-83 cells . RT-PCR and immunohistochemistry were used to detect C-erbB2 expression in SACC-83 cells. Cell proliferation was measured by the MTT assay and gene knockdown was achieved by RNA interference. Apoptosis was analyzed by flow cytometry. Results: Compared with the control , C-erbB2 mRNA expression was decreased in the C-erbB2-siRNA transfection group, and immunohistochemical analysis indicated that C-erbB2 protein expression was decreased. After C-erbB2-siRNA was transfected for 48 h, absorbance at 570 nm was 0.185 ± 0.021 compared with 0.354 ± 0.034, 0.299 ± 0.053, and 0.314 ± 0.049 in the blank control, the liposome control and negative control siRNA groups, respectively. These differences were statistically significant (P <0.05) between the C-erbB2-siRNA group and the control groups. Fold the C-erbB2 knockdown, the percentage of apoptotic cells was 5.63% compared with 2.04%, 2.85%, and 2.98% in the three control groups, respectively. Proliferation of SACC-83 cells was inhibited, and early apoptotic cells were increased. Concussion: RNA interference can effectively silence C-erbB2 gene expression and inhibit growth of SACC-83 cells, which indicates the potential of targeting this gene as a novel gene therapy approach for the treatment of salivary gland adenoid cystic carcinoma.