IFNG and small cell lung carcinoma: Total RNA was isolated (RNeasy, QIAGEN) from human pulmonary alveolar epithelial cells (PAEpiC) type II cells (Sciencell), SCLC-21H, NCI-H82, NCI-H69, H82Adh, H69Adh, H69Sc, mesenchymal stem cells (MSC) (ATCC, LGC Promochem) or from the SCLC cells after 24 h of IFN-γ treatment.