Validated siRNA for DNMT1 (ID: S4215) and HDAC1 (ID: S73) and the positive/negative control RNAi (Thermo Scientific, Applied Biosystems) were transfected into ERα-negative breast cancer MDA-MB-231 cells by the indicated treatment using the Silencer siRNA Transfection II Kit (Thermo Scientific) according to the protocols provided by the manufacturer24 (link). Relevant gene expression and enzymatic activities were detected ~72 h after transfection.
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