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| | Mutant IDH1 Cellular Assay |
| Description: | Levels of (2R)-2-hydroxyglutarate (2HG) were measured in medium of a cell line with overexpression of mutated isocitrate dehydrogenase (mIDH) protein. mIDH catalyzes the NADPH-dependent reduction of alpha-ketoglutarate to 2-HG. Cells (LN229 R132H, Mohrenz et al., Apoptosis (2013) 18:1416-1425) were grown in DMEM containing 10% FCS. They were harvested by trypsin and seeded into 96-well plates. Cells were incubated overnight at 37° C. in 5% CO2. The next day test compounds were added to each cell well. The final concentration of DMSO was 0.1% and DMSO controls were included. The plates were then placed in an incubator for 24 hours.2-HG was measured according to Balss et al. (Acta Neuropathol (2012) 124: 883-891). Briefly, HClO4 was added to each well and the plates were centrifuged. Aliquots are removed and incubated with hydroxyglutarate dehydrogenase (HGDH), diaphorase, NAD+, and resazurin. The conversion of resazurin to resorufin was detected by fluorescence spectroscopy at Ex 540 nm Em 600 nm. The increase in fluorescence is proportional to 2-HG production. IC50 values are determined by interpolation from plots of relative fluorescence vs inhibitor concentration. |
| Affinity data for this assay | |
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