Curcumin, a naturally occurring phenolic compound, has a diversity of antitumor activities. It has been previously demonstrated that
curcumin can inhibit the invasion and
metastasis of
tumors through activation of the
tumor suppressor DnaJ-like
heat shock protein 40 (HLJ1). However, the specific roles and mechanisms of
curcumin in regulating the malignant behaviors of
non-small cell lung cancer (NSCLC) cells still remain unclear. In this study, we found that
curcumin could inhibit the proliferation and invasion of NSCLC cells and induce G0/G1 phase arrest.
Metastasis-associated
protein 1 (MTA1) overexpression has been detected in a wide variety of aggressive
tumors and plays an important role on cell invasion and
metastasis. Our results showed that
curcumin could effectively inhibit the MTA1 expression of NSCLC cells. Further research on the subsequent mechanism showed that
curcumin inhibited the proliferation and invasion of NSCLC cells through MTA1-mediated inactivation of Wnt/β-
catenin pathway. Wnt/β-
catenin signaling was reported to play a critical cooperative role on promoting lung
tumorigenesis. Thus, these investigations provided novel insights into the mechanisms of
curcumin on inhibition of NSCLC cell growth and invasion and showed potential therapeutic strategies for NSCLC.