Si-Ze Chen1 ,
Xue-Mei Chen2,
Yu-Qi Li1,
Fan Zhang1,
Shu Yang1,
Kai Lan Mo1,
Xian-Yi Mo1,
Ying Ding1
1Department of Oncology, The First Affiliated Hosipital of Guangdong Pharmaceutical University;
2Department of Occupational Medicine and Health, Southern Medical University, Guangzhou, China.
For correspondence:- Si-Ze Chen
Email: chensize37@gmail.com
Received: 5 January 2015
Accepted: 24 July 2015
Published: 29 September 2015
Citation:
Chen S, Chen X, Li Y, Zhang F, Yang S, Mo KL, et al.
Inhibitory effect of berberine on zeste homolog 2 (Ezh2) enhancement in human esophageal cell lines. Trop J Pharm Res 2015; 14(9):1589-1595
doi:
10.4314/tjpr.v14i9.7
© 2015 The authors.
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Abstract
Purpose: To investigate the inhibitory effect of berberine treatment on enhancement of zeste of homolog 2 (Ezh2) expressions in KYSE450 human esophageal cancer cells.
Methods: Transwell motility chambers were used to analyze cell migration and invasion. Bio-Rad protein assay was used for the determination of protein concentration. Chemiluminescence with ECL system was employed for the detection of protein bands as per the manufacturer’s protocol. Staining was carried out with Alexa-Fluor 647 mouse anti-BrdU antibody. Flow cytometry was performed after adding DAPI. Annexin-V/DAPI staining and flow cytometry were used for the quantification of apoptotic cell death. Total RNA was isolated from KYSE450 cells using an RNA isolation kit.
Results: Berberine-induced inhibition of Ezh2 expression led to inhibition of cell proliferation by G1 phase cell cycle arrest and induced anti-invasive properties of KYSE450 cells in Boyden chamber assays. There was 92 % reduction in invasive tendency of KYSE450 cells following treatment with berberine. Histone methylation inhibitor, 3-deazaneoplanocin A (DZNep), also led to a similar effect on cell proliferation of KYSE450 cells. Berberine treatment also resulted in strong transcriptional reduction of the AXL receptor kinase. The results of qRT-PCR and FACS analyses showed significant inhibition of AXL mRNA and protein expression in KYSE450 carcinoma cells after treatment with berberine.
Conclusion: Berberine may be an effective therapeutic agent in the treatment of esophageal carcinoma.
Keywords: Berberine, Histone methylation inhibitor, Anti-invasive, Cell proliferation, Human Esophageal cancer