Chromobox protein homolog 3 (CBX3), a core component of the heterochromatin proteins 1, is recently proved to be involved in human cancerogenesis and associated with the prognosis of patient. However, the role of CBX3 in Tongue squamous cell carcinoma (TSCC) remains unclear. In the present study we found that CBX3 was upregulated in TSCC tissues when compared to adjacent non-tumor tissues, and multivariable analysis showed that high CBX3 expression was associated with clinical stage and cervical node metastasis, which was an independent prognostic indicator of TSCC. Furthermore, Kaplan-Meier survival analysis and log-rank test showed that TSCC patients with high CBX3 expression had a poorer rate of OS compared to patients with low CBX3 expression. Moreover, knocking down CBX3 inhibited TSCC cells proliferation both in vitro and in vivo, while overexpressing CBX3 promoted TSCC cells proliferation. In addition, CBX3 depletion resulted in cell cycle delay at the G1/S phase via the p21 pathway. In summary, we identifies CBX3 as a potential novel oncogene in TSCC, which may act as a biomarker and target in the diagnosis and treatment of this killer disease.
Gene – Elsevier
Published: May 15, 2018
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