Epigallocatechin gallate from green tea exhibits potent anticancer effects in A-549 non-small lung cancer cells by inducing apoptosis, cell cycle arrest and inhibition of cell migration.

PURPOSE

Green tea (Camellia sinensis) is considered as a rich source of epigallocatechin gallate (EGCG) which has been shown to exert impressive pharmacological properties. The anticancer properties of EGCG have been extensively studied however, its anticancer activity has not been explored in lung cancer. The present study was therefore designed to evaluate the anticancer effects of EGCG against non-small cell lung cancer (NSCLC) cell line A-549 and normal human fibroblast FR-2 cells.

METHODS

Cell viability was assessed by CCK8 assay, apoptosis by DAPI, annexin V/propidium iodide (PI) and flowcytometery and cell cycle analysis by flow cytometry. Cell migration capacity was investigated by wound-healing assay and protein expression was examined by Western blotting.

RESULTS

The results revealed that EGCC could inhibit the proliferation of A-549 cells in a concentration-dependent manner and exhibited an IC50 of 25 μM against the IC50 of 100 μM against the normal human fibroblasts. Further evaluation revealed that EGCG exerts its anticancer effects via induction of apoptosis, modulation of Bax/blc-2 ratio and by triggering G2/M cell cycle arrest. Furthermore, EGCG could also inhibit the migration of A5-49 cells in a concentration-dependent manner.

CONCLUSION

In conclusion, based on our results, we believe that EGCG could prove to be an important lead molecule for the treatment of lung cancer.