International journal of molecular medicine

Curcumin induces the apoptosis of A549xa0cells via oxidative stress and MAPK signaling pathways.

PMID 26310655


Curcumin has been found to exhibit anticancer activity and certain studies have shown that curcumin triggers the apoptosis of human A549xa0lung adenocarcinoma cells. However, the mechanism underlying curcumin‑mediated apoptosis is not completely understood. The present study was designed to investigate the effect of curcumin on the induction of apoptosis and apoptosis‑related factors in human A549xa0lung adenocarcinoma cells. Treatment of A549xa0cells with curcumin caused a concentration‑dependent inhibition of cell growth and an increase in apoptosis, as confirmed by THE MTT assay, flow cytometry and morphology analysis. Curcumin‑treatment of A549xa0cells induced a loss of the mitochondrial membrane potential and increased cytosolic cytochromexa0c. Furthermore, curcumin‑induced apoptosis was accompanied by changes in intracellular oxidative stress‑related enzymes, including decreased intracellular reactive oxygen species levels, increased superoxide dismutase and decreased malondialdehyde and 4‑hydroxynonenal. In addition, induction of apoptosis was also accompanied by phosphorylation and activation of mitogen‑activated protein kinase signaling pathway factors c‑Jun N‑terminal kinase, p38 and extracellular signal-regulated kinase.