CDH3 is associated with poor prognosis by promoting the malignancy and chemoresistance in oral squamous cell carcinoma.

BACKGROUND: CDH3 is recognized as an oncogene in various malignancies. Here, we aim to explore the association of CDH3 expression and prognostic implication in oral squamous cell carcinoma (OSCC). METHODS: Bioinformatics was used to analyze differentially expressed genes in the TCGA database. The OSCC tissues of 136 cases were used for immunohistochemistry. Cox proportional hazard analysis was used to analyze the relationship between prognostic factors, CDH3 expression and patient survival. Kaplan-Meier analysis was adopted to calculate survival rates. RT-qPCR and Western blot were performed to detect the expression levels of CDH3 in oral squamous cell lines. The cell viability and colony formation abilities were examined by CCK-8 and colony formation assays, respectively. Wound healing assay was performed to examine the invasion ability of cells. RESULTS: CDH3 is up-regulated in oral squamous cell carcinoma and related to bad prognosis. Knock-down of CDH3 limited cell viability, colony formation ability, migration, invasion and chemoresistance of OSCC cells. CONCLUSION: CDH3 is associated with a poor prognosis through promoting migration, invasion and chemoresistance in oral squamous cell carcinoma.