Abstract
SOX8 plays an important role in several physiological processes. Its expression is negatively associated with overall survival in patients with colorectal carcinoma (CRC), suggesting SOX8 is a potential prognostic factor for this disease. However, the role of SOX8 in CRC remains largely unknown. In this study, our data showed that SOX8 expression was upregulated in CRC cell lines and tumor tissues. Stable knockdown of SOX8 in CRC cell lines dramatically reduced cell proliferation, migration, and invasion. Furthermore, the knockdown of SOX8 decreased the phospho-GSK3β level and suppressed Frizzled-6 (FZD6) transcription; restoration of FZD6 expression partially abolished the effect of SOX8 on Wnt/β-catenin signaling and promote CRC cell proliferation. In conclusion, our findings suggested that SOX8 served as an oncogene in CRC through the activation of FZD6-dependent Wnt/β-catenin signaling.
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