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CLDN7 overexpression suppresses the proliferation of oral squamous cell carcinoma cells. (A) CLDN7 expression in CAL-27 cells was determined via western blotting after transfection with a CLDN7 overexpression plasmid. (B) Cell viability was detected using a Cell Counting Kit-8 assay. (C and D) A colony formation assay was performed to determine the proliferative abilities of CAL-27 cells. **P<0.01, ***P<0.001 vs. pcDNA3.1. CLDN7, Claudin-7.
