4–12% SDS/PAGE (Life Technologies), transferred to Hybond PVDF
membranes (Amersham), blocked with 5% milk in PBS with 0.1%
Tween 20 (PBS/Tween) for 1 hr, and incubated with the following antibodies:
anti-cleaved caspase-3 (Cell Signaling, 9664), anti-cleaved caspase-7 (Cell
Signaling, 9491), anti-Hsp70 (BD Pharmingen, 610607), anti-IDH1 (Cell Signaling,
8137), anti-H3K4me3 (Millipore, CS200580), anti-H3K9me3 (Active Motif, 39161),
anti-H3K27me3 (Millipore, CS200603), anti-H3K36me3 (Abcam, ab9050), anti-Histone
H3 (Cell Signaling, 4499), anti-ME1 (Abcam, ab97445), anti-FoxO6 (Thermo
Scientific PA5–35117), anti-phospho-FoxO6 (Abcam, ab154832),
anti-phospho-EGFR (Cell Signaling, 2236S), anti-EGFR (Santa Cruz, sc-373746),
anti-phospho-Akt (Cell Signaling, 4060S), and anti-Akt (Cell Signaling, 9272S).
The blots were subsequently incubated with goat anti-rabbit IgG or goat
anti-mouse IgG antibodies (Santa Cruz) in 5% milk in PBS/Tween and
developed with Supersignal West Dura ECL (enhanced chemiluminescence) substrate
(Pierce) following manufacturer’s protocol. Quantification of blots was
determined by densitometry using ImageJ software.