Abstract：
:Enhancer of zeste homolog 2 (EZH2) is a highly conserved histone methyltransferase, which is overexpressed in different types of cancers such as breast and prostate cancer. It is reported that EZH2 can directly down-regulate RUNX3 by increasing histone H3 methylation. However, the role of EZH2 in the development and progression of laryngeal carcinoma has not yet been investigated, and the relationship between EZH2 and RUNX3 in laryngeal carcinoma is rarely reported. The current study aims to determine the role of EZH2 in the progression of laryngeal carcinoma, and investigate the interaction between EZH2 and the tumor suppressor RUNX3. Our study found that EZH2 is overexpressed in laryngeal carcinoma patients, and silencing EZH2 by EZH2 siRNA significantly inhibited the proliferation of laryngeal carcinoma cells. Besides, we also found that RUNX3 is repressed in laryngeal carcinoma patients. Moreover, RUNX3 as a downstream target protein of EZH2 is up-regulated by EZH2 siRNA accompanied by a decrease in the trimethylation modification pattern of H3K27. RUNX3 siRNA inhibits the decreased proliferation induced by EZH2 siRNA. Furthermore, β-catenin protein expression is down-regulated by EZH2 siRNA and up-regulated by RUNX3 siRNA, and RUNX3 siRNA inhibits the down-regulation effect of EZH2 siRNA on β-catenin protein expression. Additionally, the Wnt/β-catenin activator BIO reverses the inhibitory effect of EZH2 siRNA on Hep-2 cell proliferation. Taken together, our results suggest that EZH2 regulates cell proliferation potentially by targeting RUNX3 through the Wnt/β-catenin signaling pathway in laryngeal carcinoma.
journal_name
Mol Cell Biochemjournal_title
Molecular and cellular biochemistryauthors
Lian R,Ma H,Wu Z,Zhang G,Jiao L,Miao W,Jin Q,Li R,Chen P,Shi H,Yu Wdoi
10.1007/s11010-017-3133-7subject
Has Abstractpub_date
2018-02-01 00:00:00pages
35-43issue
1-2eissn
0300-8177issn
1573-4919pii
10.1007/s11010-017-3133-7journal_volume
439pub_type
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