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[Dectection of G3BP and CD44v6 in the tissues of laryngeal squamous cell carcinoma and their clinical significance].
Xi Bao Yu Fen Zi Mian Yi Xue za Zhi = Chinese Journal of Cellular and Molecular Immunology 2017 July
Objective To study the expressions of RNA-binding Ras-GAP SH3 binding protein (G3BP) and tumor stem cell marker CD44v6 in laryngeal squamous cell carcinoma and their correlations with angiogenesis. Methods We collected the cancer tissues and corresponding paracancerous tissues from 56 patients with laryngeal squamous cell carcinoma. The expressions of G3BP and CD44v6 proteins were detected by Western blotting in cancer tissues and corresponding paracancerous tissues; the expressions of G3BP, CD44v6 and vascular endothelial growth factor A (VEGF-A) were tested by immunohistochemistry. Thereafter, we compared the positive expression rates of G3BP and CD44v6 between in cancer tissues and in normal tissues, analyzed the correlations between the expressions of G3BP, CD44v6 and the laryngeal squamous cell carcinoma features as well as their correlations with microvessel density (MVD) that was determined by FVIIIAg immunohistochemistry. Results Western blotting showed that the expressions of G3BP and CD44v6 proteins in the laryngeal squamous cell carcinoma were higher than those in the paracancerous tissues. Immunohistochemistry showed that compared with the paracancerous tissues, G3BP, CD44v6 and VEGF-A expressions (the positive rates are 58.9%, 53.6%, 46.4%, respectively) were higher in cancer tissues. The positive rates of G3BP and CD44v6 in cancer tissues were related with the clinical stage, recurrence or metastasis, and lymph node metastasis of laryngeal squamous cell carcinoma, but had nothing to do with patients' age and tumor size. Pearson correlation analysis showed the expressions of both G3BP and CD44v6 were positively correlated with VEGF-A (r=0.741, r=0.756). MVD values were significantly higher in the G3BP and CD44v6 positive cases than in paracancerous tissues, but there was no difference in MVD between those without G3BP and CD44v6 positive expressions and the paracancerous tissues. Conclusion The positive expression rates of G3BP and CD44v6 in laryngeal squamous cell carcinoma tissues are very high, and they have a close relationship with the clinical prognosis. They may raise the VEGF-A expression so as to promote angiogenesis, and then accelerate the development of the laryngeal squamous cell carcinoma.
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