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Combined detection of Gab1 and Gab2 expression predicts clinical outcome of patients with glioma

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Abstract

Grb2-associated binder 1 (Gab1) and Gab2 play important roles in cancer cell signaling. In particular, it has been demonstrated that the upregulation of Gab2 may be correlated with the World Health Organization (WHO) grade of gliomas and that patients with high Gab2 expression levels exhibited shorter survival time. However, the prognostic value of combined expression of Gab1 and Gab2 has not been explored. Gab1 and Gab2 expression in human gliomas and non-neoplastic brain tissues was measured by immunohistochemistry. Both the expression levels of Gab1 and Gab2 proteins in glioma tissues were significantly higher than those in non-neoplastic brain tissues (both P < 0.001). In addition, the overexpression of Gab1 and Gab2 proteins were both significantly associated with advanced WHO grades (both P < 0.001) and low KPS (both P = 0.01). Moreover, the overall survival of patients with high Gab1 protein expression or high Gab2 protein expression was obviously lower than those with low expressions (both P < 0.001). Notably, glioma patients with combined overexpression of Gab1 and Gab2 proteins (Gab1-high/Gab2-high) had shortest overall survival (P < 0.001). Furthermore, multivariate analysis showed that Gab1 expression (P = 0.01), Gab2 expression (P = 0.02), and combined expression of Gab1 and Gab2 (Gab1/Gab2, P = 0.006) were all independent prognostic factors for overall survival in glioma patients. Gab1 and Gab2 proteins are differentially expressed in glioma patients and closely correlated with the biological behavior of this malignancy. Combination of Gab1 and Gab2 expression may represent a promising biomarker for prognostication of human gliomas.

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Acknowledgments

This work was funded by National Natural Science Foundation of China (No. 81272419, 81101736, 81272776) and Natural Science Foundation of Shannxi Province (No. 2014JM4148).

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Correspondence to Yanyang Tu or Yongsheng Zhang.

Additional information

Hui Liu and Gang Li offer the equal contributions to this study. Yanyang Tu and Yongsheng Zhang are co-corresponding authors.

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Liu, H., Li, G., Zeng, W. et al. Combined detection of Gab1 and Gab2 expression predicts clinical outcome of patients with glioma. Med Oncol 31, 77 (2014). https://doi.org/10.1007/s12032-014-0077-6

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  • DOI: https://doi.org/10.1007/s12032-014-0077-6

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