Considering the total trial population irrespective of MGMT status, a clear trend towards a survival benefit from nimotuzumab was already detectable when tumors had above median levels of phosphorylated ribosomal protein S6.
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Akt and mTORC1 signaling as predictive biomarkers for the EGFR antibody nimotuzumab in glioblastoma.
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This unplanned subgroup analysis, however, included only 28 patients and failed to reach statistical significance.
Within the group of above median value necrotic tumors, nimotuzumab treatment resulted in a slight trend towards improved survival, whereas no trend was detectable in below or median value necrotic tumors (Fig. 3a ).