When NSCLC cells were co‐transfected with miR‐20a mimics and OE‐PTEN, PTEN was up‐regulated relative to the levels observed in cells with miR‐20a mimics and negative control (NC) plasmids co‐transfection in both the presence and absence of DDP treatment (Figure 7A). The gene discussed is PTEN; the disease is non-small cell lung carcinoma.