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Down-regulation of HER2 enhances the sensitivity of PC-9/ER cells to anti-cancer drugs. (A) PC-9/ER cells were transfected with the indicated siRNA (each at 10 nM). At 48 h after transfection, immunoblot and immunoprecipitation were performed. (B) PC-9/ER cells were transfected with the indicated siRNA (each at 10 nM). On the next day, cells were then treated with the indicated anti-cancer drugs for various time intervals, followed by immunoblot.
