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Increased expression of phosphatidylethanolamine-binding protein 4 (PEBP4) strongly associates with human gliomas grade. | LitMetric

AI Article Synopsis

Article Abstract

Abnormal expression of phosphatidylethanolamine-binding protein 4 (PEBP4) has been found in various types of malignancies. However, the PEBP4 expression in human gliomas is still unclear. In this study, we aim to compare the expression of PEBP4 in tumor samples derived from 58 patients with different grades of gliomas with that in 5 non-neoplastic brain samples and to investigate the clinical significance of PEBP4 expression in gliomas. The mRNA and protein expressions of PEBP4 were measured by real-time quantitative polymerase chain reaction and western blot, respectively. The intracellular expressions of PEBP4 in samples were examined by immunohistochemistry. The association between PEBP4 expression and the clinicopathologic characteristics of gliomas patients were analyzed. Our results demonstrated that the mRNA and protein levels of PEBP4 were upregulated in gliomas tissues, especially in high-grade (World Health Organization Grades III and IV) gliomas, when compared to normal control (p < 0.01). Immunohistochemical analysis indicated that PEBP4 was highly expressed in 82.4% (28/34) of high-grade gliomas, when compared to 41.7% (10/24) of high expression in low-grade gliomas and 20.0% (1/5) in non-neoplastic brain samples (p = 0.001). Multivariate Cox regression analysis revealed that increased PEBP4 expression was an independent prognostic factor for gliomas. Patients with low level of PEBP4 had longer survival time compared to those with high PEBP4 expression (p = 0.003). These data indicate a clinical significance of PEBP4 for predicting the tumor grade and the prognosis in patients with gliomas.

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http://dx.doi.org/10.1007/s11060-015-2040-6DOI Listing

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