Subsequently, both CCK-8 and EdU assays showed that compared with single transfection of pcDNA-SPINK5, the proliferative capacity of NSCLC cells was markedly enhanced by cotransfection of pcDNA-SPINK5 and pcDNA-PSIP1 (Figures 4(b) and 4(c)). Here, SPINK5 is linked to non-small cell lung carcinoma.