CD70 and non-small cell lung carcinoma: To analyze the impact of CDDP treatment on CD70 expression, 3 NSCLC cell lines (NCI-H1650, A549, NCI-H1975) were selected out of the panel of NSCLC cell lines, based on their aberrations in CD70 expression levels (CD70-, CD70+ and CD70++) by flow cytometry and screened for membranous CD70 expression levels in response to CDDP treatment.