Min Lv1,
Bo Li2,
Zhi-xuan Fu2,
Yu-ping Zhu2
1Department of Ultrasound;
2Department of Colorectal Cancer Surgery, Zhejiang Cancer Hospital, Hangzhou 310022, Zhejiang Province, PR China.
For correspondence:- Yu-ping Zhu
Email: zhuyuping494@126.com Tel:+8657188128011
Accepted: 17 April 2018
Published: 28 May 2018
Citation:
Lv M, Li B, Fu Z, Zhu Y.
Gamellia sinensis O.Ktze extract shows anti-colorectal cancer activity via MAPK/ERK signaling pathway. Trop J Pharm Res 2018; 17(5):817-822
doi:
10.4314/tjpr.v17i5.10
© 2018 The authors.
This is an Open Access article that uses a funding model which does not charge readers or their institutions for access and distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0) and the Budapest Open Access Initiative (http://www.budapestopenaccessinitiative.org/read), which permit unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited..
Abstract
Purpose: To investigate the therapeutic effects of Gamellia sinensis O.Ktze extract (GSOE) on colorectal cancers, as well as the underlying mechanisms.
Methods: The effect of GSOE on colorectal cancer cells HCT-116 or Caco-2 growth was tested, and then the apoptosis and invasion was analyzed by MTT, flow cytometry and Transwell assay in vitro. Next, the mice received three doses (200, 400 or 800 mg/kg/day, gastric perfusion) of GSOE to evaluate its effects on tumor growth. Lung metastasis in mouse xenograft models which were inoculated with HCT-116 or Caco-2 cells were also investigated. The expression of p-ERK and p-MEK were evaluated by western blot analysis in HCT-116 and Caco-2 cells with or without GSOE treatment in vitro.
Result: GSOE significantly inhibited colorectal cancer cell growth and induced apoptosis or cell cycle arrest at G1- and S-phases in HCT-116 cells and Caco-2 cells in a dose-dependent manner. Moreover, GSOE effectively retarded tumor cell migration and invasion through ERK/MAPK signaling pathway suppression.
Conclusion: These findings demonstrate that GSOE has an anti-tumor effect in colorectal cancer by inactivating ERK/MAPK signaling pathway.
Keywords: Gamellia sinensis O.Ktze, Colorectal cancer, Invasion, Apoptosis, Cell cycle arrest ERK, MAPK