TGFB1 and esophageal squamous cell carcinoma: To support that SMAD4 intercedes the part of miR‐130a‐3p in TGF‐β‐induced answers in ESCC cells, we transfected pcDNA3.1‐SMAD4 plasmid into EC‐1 cells with TGF‐β stimulation as well as miR‐130a‐3p overexpression.