title: Protein Markers Predict Survival in Glioma Patients.
abstract: Glioblastoma multiforme (GBM) is a genomically complex and aggressive primary adult brain tumor, with a median survival time of 12-14 months. The heterogeneous nature of this disease has made the identification and validation of prognostic biomarkers difficult. Using reverse phase protein array data from 203 primary untreated GBM patients, we have identified a set of 13 proteins with prognostic significance. Our protein signature predictive of glioblastoma (PROTGLIO) patient survival model was constructed and validated on independent data sets and was shown to significantly predict survival in GBM patients (log-rank test: p = 0.0009). Using a multivariate Cox proportional hazards, we have shown that our PROTGLIO model is distinct from other known GBM prognostic factors (age at diagnosis, extent of surgical resection, postoperative Karnofsky performance score (KPS), treatment with temozolomide (TMZ) chemoradiation, and methylation of the MGMT gene). Tenfold cross-validation repetition of our model generation procedure confirmed validation of PROTGLIO. The model was further validated on an independent set of isocitrate dehydrogenase wild-type (IDHwt) lower grade gliomas (LGG)-a portion of these tumors progress rapidly to GBM. The PROTGLIO model contains proteins, such as Cox-2 and Annexin 1, involved in inflammatory response, pointing to potential therapeutic interventions. The PROTGLIO model is a simple and effective predictor of overall survival in glioblastoma patients, making it potentially useful in clinical practice of glioblastoma multiforme.
authors.affiliation: From §Case Comprehensive Cancer Center and the Center for Proteomics and Bioinformatics, Case Western Reserve University, 11100 Euclid Avenue, Cleveland, OH 44106.
authors.forename: Lindsay C
authors.initials: LC
authors.lastname: Stetson
authors.affiliation: From §Case Comprehensive Cancer Center and the Center for Proteomics and Bioinformatics, Case Western Reserve University, 11100 Euclid Avenue, Cleveland, OH 44106.
authors.forename: Jean-Eudes
authors.initials: JE
authors.lastname: Dazard
authors.affiliation: From §Case Comprehensive Cancer Center and the Center for Proteomics and Bioinformatics, Case Western Reserve University, 11100 Euclid Avenue, Cleveland, OH 44106 jsb42@case.edu.
authors.forename: Jill S
authors.initials: JS
authors.lastname: Barnholtz-Sloan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000378:metabolism*; D001932:Brain Neoplasms / Q000188:drug therapy* / Q000235:genetics / Q000378:metabolism; D003606:Dacarbazine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use; D005260:Female; D005909:Glioblastoma / Q000188:drug therapy* / Q000235:genetics / Q000378:metabolism; D006801:Humans; D007521:Isocitrate Dehydrogenase / Q000235:genetics; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D016016:Proportional Hazards Models; D040901:Proteomics / Q000379:methods*; D016019:Survival Analysis; D000077204:Temozolomide; D055815:Young Adult
chemical_list: D014408:Biomarkers, Tumor; D003606:Dacarbazine; D007521:Isocitrate Dehydrogenase; D000077204:Temozolomide