PMID- 19784583 OWN - NLM STAT- MEDLINE DCOM- 20091015 LR - 20131121 IS - 0253-6269 (Print) IS - 0253-6269 (Linking) VI - 32 IP - 9 DP - 2009 Sep TI - Apoptosis induction effects of EGCG in laryngeal squamous cell carcinoma cells through telomerase repression. PG - 1263-9 LID - 10.1007/s12272-009-1912-8 [doi] AB - Epigallocatechin-3-gallate (EGCG), the major component of green tea polyphenol, has potent efficiency to prevent the growth of a variety of cancer cells. As a novel anticancer agent for treatment of cancers, EGCG is promising and the mechanism has not been fully understood. Laryngeal squamous cell carcinoma (LSCC) is one common tumor in head and neck cancers. In the present study, we assess the effects of EGCG on LSCC cell line Hep-2, and their possible involvement in EGCG-induced apoptosis. The result showed that treatment of Hep-2 cells with EGCG decreased the cell viability, inhibited the growth and proliferation, induced apoptosis and increased the activity of caspase-3 in a dose-dependent manner. Furthermore, we found that EGCG-treatment repressed telomerase activity effectively in a concentration-dependent manner. The combined results show that EGCG induced apoptosis in Hep-2 cells via inhibiting the telomerase activity. FAU - Wang, Xi AU - Wang X AD - Research Center, Tangdu Hospital, Fourth Military Medical University, Xi'an, China. FAU - Hao, Miao-Wang AU - Hao MW FAU - Dong, Ke AU - Dong K FAU - Lin, Fang AU - Lin F FAU - Ren, Ji-Hong AU - Ren JH FAU - Zhang, Hui-Zhong AU - Zhang HZ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090926 PL - Korea (South) TA - Arch Pharm Res JT - Archives of pharmacal research JID - 8000036 RN - 0 (Antineoplastic Agents) RN - 8R1V1STN48 (Catechin) RN - BQM438CTEL (epigallocatechin gallate) RN - EC 2.7.7.49 (TERT protein, human) RN - EC 2.7.7.49 (Telomerase) RN - EC 3.4.22.- (Caspase 3) SB - IM MH - Antineoplastic Agents/*pharmacology MH - Apoptosis/*drug effects MH - Caspase 3/metabolism MH - Catechin/*analogs & derivatives/pharmacology MH - Cell Line, Tumor MH - Cell Proliferation/drug effects MH - Enzyme Activation/drug effects MH - G1 Phase/drug effects MH - Humans MH - Laryngeal Neoplasms/*drug therapy/pathology MH - Telomerase/*antagonists & inhibitors/genetics EDAT- 2009/09/29 06:00 MHDA- 2009/10/16 06:00 CRDT- 2009/09/29 06:00 PHST- 2009/04/23 00:00 [received] PHST- 2009/08/04 00:00 [accepted] PHST- 2009/08/03 00:00 [revised] PHST- 2009/09/29 06:00 [entrez] PHST- 2009/09/29 06:00 [pubmed] PHST- 2009/10/16 06:00 [medline] AID - 10.1007/s12272-009-1912-8 [doi] PST - ppublish SO - Arch Pharm Res. 2009 Sep;32(9):1263-9. doi: 10.1007/s12272-009-1912-8. Epub 2009 Sep 26.