PDCD4 and non-small cell lung carcinoma: PDCD4 protein expression in NSCLC tissues before and after radiotherapy (before, 0.42 ± 0.23; after, 0.84 ± 0.54) was lower than that in adjacent normal tissues (1.44 ± 0.86) (Figure 1C & 1D, both P < 0.05).