A four-protein expression prognostic signature predicts clinical outcome of lower-grade glioma

摘要

BackgroundGlioma is a wide category of brain tumor originates from glial cells. Lower-Grade Glioma (LGG) consists of World Health Organization (WHO) grade II and grade III gliomas. Since the LGGs can infiltrate into adjacent areas, the complete removal of tumor is difficult and it results in recurrence and malignant progression to high grade glioma. Our study uncovers robust survival indicators in LGG which can be checked by immunohistochemistry to predict the outcome of lower grade. In addition, it unravelled the novel therapeutic targets in order to improve the survival of LGG patients. MethodsTo identify a prognostic signature based on protein expression in LGGs, we analysed Reverse Phase Protein Array data of LGG samples (n?=?380) from The Cancer Genome Atlas cohort. We made random stratification of samples into discovery (n?=?228) and validation datasets (n?=?152). We performed multivariate Cox proportional hazards regression analysis of proteins (n?=?219) using discovery dataset with age, WHO grade and IDH mutation status. ResultsWe identified four-protein prognostic signature that can segregate patients into high- and low-risk. The signature estimates poor overall survival for high-risk patients in both discovery (hazard ratio [HR]?=?4.11; 95% confidence interval [CI]?=?2.18–7.75;p?