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Med Oncol. 2013 Dec;30(4):677. doi: 10.1007/s12032-013-0677-6. Epub 2013 Aug 31.

Increased expression of the 58-kD microspherule protein (MSP58) is correlated with poor prognosis in glioma patients.

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  • 1Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China.

Abstract

The pathological grading system for human gliomas is usually used to evaluate the prognosis of glioma patients. However, some glioma patients with similar grades have obvious discrepancies in survival. It is therefore necessary to identify some new certain tumor biomarkers that are more suitable for the prognostic assessment of gliomas than the grading system. The 58-kD microspherule protein (MSP58) is an evolutionarily conserved nuclear protein and plays an important role in the regulation of cell proliferation and malignant transformation. However, whether MSP58 can be used as a biomarker to evaluate the malignancy and the prognosis of glioma patients is unknown. In the present study, we performed immunohistochemical analysis to evaluate MSP58 protein expression in 158 specimens of human gliomas and 34 normal control brain tissues. Compared with the control tissues, MSP58 expression was not only significantly higher in the glioma tissues (P < 0.05), but also increased with the increasing pathological grade (P < 0.001). Furthermore, the Kaplan-Meier analysis showed that high expression of MSP58 could predict poor survival in glioma patients (P < 0.001). In the multivariate analysis, high expression of MSP58 was also an independent unfavorable prognostic factor for the overall survival in glioma patients (P < 0.001, hazard ratio, 8.177, 95% CI 2.571-26.008). In conclusion, the increased expression of MSP58 is correlated with a higher malignant grade and poor prognosis in glioma patients. MSP58 is valuable both as an indicator of the malignancy of gliomas and as a prognostic factor for the clinical outcome of glioma patients.

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