Fig. 1

Parthenolide inhibits NSCLC cell growth and colony formation. a Chemical structure of parthenolide. b The NSCLC and normal cells (H1975, PC-9, HCC827, H460, H358, A549 and BEAS-2B) were treated with various concentrations of parthenolide (0, 2.5, 5, 10, 20 and 40 µM) for 24 h, and cell viability was determined using the CCK8 assay. c H1975, PC-9 and HCC827 cells were treated with parthenolide at different concentrations (0, 1.25, 2.5 and 5 µM) for 10 days. Colonies were stained with crystal violet, and representative photomicrographs of crystal violet stained colonies were depicted