Meeting Banner
Abstract #1554

Glioma Cells Overexpressing Isocitrate Dehydrogenase 1 (IDH1) Mutation Produce 2-Hydroxy Glutaric Acid Detectable in vivo

Jelena Lazovic1, Horacio Soto, David Piccioni, Arthur Chou, Sichen Li, Robert Prins, Linda Liau, Timothy Cloughesy, Albert Lai, Whitney Pope

1Radiology, University of California, Los Angeles, CA, United States

The presence of isocitrate dehydrogenase 1 (IDH1) R132 mutation in gliomas including secondary glioblastoma is associated with more favorable outcome and increased overall survival compared to patients with functional IDH1. The aim of this study was to investigate metabolic changes and tumor growth rates in U87 glioma cells transformed to express mutated IDH1-R132. We found IDH1-R132 overexpression to be associated with an increase in tumor growth rate. Metabolic changes associated with the IDH1-R132 mutation included elevated levels of 2-hydroxyglutaric acid and reduced glutamate levels.

Keywords

accompanied accumulation acid additional alternatively amino among apparent appears arginine basis better blood carries carry caused cell cells choline clear coefficient color considered consistent construct containing contrast contribute control correlate correlated correlation coupling dang days detectable determine determined diffusion done early echoes enzyme established event expectations explanation expressed faster favorable flag flank frequently function gain gene glutamate good grade gradient grew growth histology hydroxy hypoxia improved in vivo injected injection injections lactate larger leading maps metabolic metabolism metabolites mice modeled mutated mutation mutations nature necrosis necrotic notice outcome outgrew oxidative parallel patients peak pixel planar plat pope post preceding precursor presence process processed produce production prognosis progression protein pseudo quantification quantify radiology reached recent reduced remains replacement reports representative represents required residue resolution responsible revealed sacrificed scale secondary serve significance significantly spectroscopy spectrum spin staining statistical studies survival system thought timothy tissue toxic transverse tumor tumors type vector viral volume volumes week wild