Abstract
Our previous study has revealed that EphA2 overexpression is significantly associated with aggressive behavior and poor prognosis in patients with squamous-cell carcinoma of the head and neck (SCCHN). However, the function of EphA2 in tumorigenesis and cervical lymph node metastasis of SCCHN has never been elucidated in vivo. EphA2 was knocked down in SCCHN cell lines. CCK-8 assays, fluorescence-activated cell sorting analysis, invasion and migration assays were performed in vitro. In vivo tumorigenicity assays were performed, and the impact on cervical lymph node metastasis was evaluated. The present investigation demonstrated that suppression of EphA2 resulted in a significant inhibition of proliferation, migration, invasion of SCCHN cells in vitro and markedly diminished their tumorigenicity and lymph node metastasis in vivo. These results suggest that EphA2 plays a critical role in SCCHN growth and metastasis and may be a promising therapeutic target to prevent the progression of SCCHN.
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