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Over-expression of SOX8 predicts poor prognosis in colorectal cancer: A retrospective study
Yang Wang1, Wangshuo Yang, Tianyi Liu
1Department of General Surgery, the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China.
Abstract:
Aberrant expression of SRY-box 8 (SOX8) is closely correlated with the development and progression of many types of cancers in human. Limited studies report the relationship between SOX8 expression and overall survival in colorectal cancer (CRC). This study aimed to collect the pathological tissues and clinical data in order to analyze the relationship between SOX8 expression and clinicopathological parameters and prognosis of CRC patients. Tissue microarrays were constructed from 424 primary CRC patients with clinicopathological information and follow-up data. Immunohistochemistry (IHC) was performed on tissue microarrays to explore the relationship between SOX8 expression and clinicopathological information and patient's prognosis. The expression of SOX8 was higher in CRC tissues than that in non-tumor adjacent tissues (NATs, P <.001). High expression of SOX8 was associated with tumor stage (P = .04) and shorter overall survival (OS) after operation of patients (P = .004). Subsequently, univariate COX analysis identified that high expression of SOX8 (P = .004), differentiation (P = .006), distant metastasis (P <.001), tumor stage (P = .003), and higher rate of lymph node metastasis (P <.001), all significantly predicted decrease in OS. Multivariate analysis demonstrated that distant metastasis (P <.001), high SOX8 expression, (P = .013) and lymph node metastasis (P <.001) were independent poor prognostic factors in CRC patients. This study showed that SOX8 is over-expressed in patients with high T stage, which affects the outcome of prognosis in CRC patients. High expression of SOX8 usually has a poor independent prognostic factor for CRC.
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