For the metabolic rescue experiment, cells were maintained on RPMI buffered with 40 mM HEPES, and treated with methyl pyruvate (10 mM) or dimethyl ketoglutarate (8 mM) and/or DBZ (250 nM). We added new media every two days.
For the measurement of PTEN intracellular levels in PDTALL 19 human primary xenografted samples, we removed red cells from peripheral blood samples by incubation with red blood cell lysis buffer (155 mM NH4Cl, 12 mM KHCO3 and 0.1 mM EDTA) for 5 min at room temperature. We then stained the samples with anti-human-CD45 (eBioscience, Cat# 17-0459-42, clone HI30, dilution 1:200). Next, we performed fixation/permeabilization using Foxp3/Transcription Factor Staining Buffer Set (eBioscience Cat# 00-5523), following manufacturer’s instructions. Finally, we performed intracellular staining with anti-PTEN-PE (BD Phosflow, Cat# 560002, clone A2B1, dilution 1:5) and we used PE-labeled mouse IgG1 isotype as a control (BD Pharmingen, Cat# 551436, dilution 1:5).