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Knockdown of six2 enhances cisplatin sensitivity of A549 cells. A, B, A549 cells with or without six2 knockdown were treated with cisplatin, and followed by cell viability (A) and apoptosis (B) assay. C, Expression of apoptosis executors (cleaved caspase 3 and cleaved PARP) was examined in the cells depicted in (A). Data were presented as mean ± SD; **P < 0.01 vs A549
