PTGS2 and non-small cell lung carcinoma: To further clarify the roles of PTGS2 in the chemoresistance of NSCLC cells, stable cell lines overexpressing or knocking down PTGS2 (A549-pCDH/PTGS2, H460-pCDH/PTGS2, or A549/DDP-GV248/shPTGS2) were constructed (Figure S1 and Data Sheet S2).