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20 October 2017 : Clinical Research

High Expression of S100A6 Predicts Unfavorable Prognosis of Lung Squamous Cell Cancer

Xigang He1ABCD, Xueliang Xu2EF, Abdul Qadir Khan3EF, Wei Ling2ABCDEFG*

DOI: 10.12659/MSM.904279

Med Sci Monit 2017; 23:5011-5017

Abstract

BACKGROUND: S100 family of proteins is mainly involved in regulation of intracellular calcium homeostasis. Aberrant expression of S100 family members has been reported in many types of cancers. However, as a member of S100 family, the prognostic value of S100A6 for lung squamous cell carcinoma (SCC) has not been well-studied.

MATERIAL AND METHODS: Using immunohistochemistry, we investigated the expression of S100A6 in 177 patients with SCC and further divided the cohort into a high S100A6 expression group and a low S100A6 expression group. The chi-square test was applied to analyze the correlation between S100A6 expression and clinicopathological factors. Univariate analysis using the Kaplan-Meier method was performed to compare the difference in survival rates between the high S100A6 expression group and the low S100A6 expression group; multivariate analysis with Cox regression model was used to identify independent prognostic risk factors.

RESULTS: In our experiment, we demonstrated that the expression of S100A6 was significantly associated with patient age and tumor differentiation. High-expression of S100A6 was shown to be substantially related to the unfavorable prognosis of SCC. Moreover, our results confirmed that S100A6 was an independent risk factor for SCC prognosis, and could predict unfavorable prognosis.

CONCLUSIONS: High-expression of S100A6 was identified as an independent unfavorable prognostic factor for SCC, suggesting that targeting S100A6 may result in the development of potential targeted drug for SCC.

Keywords: Lung Neoplasms, Neoplasms, Squamous Cell, Prognosis, S100 Proteins

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750