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In this study, the human lung squamous carcinoma cell line NCI-H226 was transfected with the recombinant plasmid pBudCE4.1_Cx43 to explore the role of the Cx43 gene in cell growth, cell cycle, and tumor migration. pBudCE4.1-Cx43 was transfected into human lung squamous carcinoma NCI-H226 cells using Lipofectamine TM2000. The mRNA and protein expressions of Cx43 in the transfected cells were detected by reverse transcriptase polymerase chain reaction and western blot analysis. The cell-cell communication was detected using the scratch dye tracer method and the cell cycle was detected by flow cytometry. The CCK-8 proliferation, scratch healing, and cell invasion assays were performed to evaluate the effect of the Cx43 gene transfection on the proliferation, migration, and invasive abilities of NCI-H226 cells. Cx43 mRNA and protein expressions and the fluorescence intensity in the scratch healing test were significantly higher in the experimental group than those in the control and blank groups (P &lt; 0.05 and &lt; 0.01, respectively). The CCK-8 proliferation assay and the scratch healing experiment revealed significantly inhibited NCI-H226 cell proliferation (especially 72 h after incubation) and cell migration, respectively, in the experimental group, compared to the control and blank groups (P &lt; 0.001 and &lt;0.05, respectively). The transwell chamber test showed a statistically significant decrease in the invasive ability of NCI-H226 cells in the experimental group (P &lt; 0.05). Therefore, Cx43 gene transfection could inhibit the migration of human lung squamous carcinoma cell line NCI-H226, thereby inhibiting tumor cell proliferation.

Effects of Cx43 gene modification on the proliferation and migration of the human lung squamous carcinoma cell line NCI-H226