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3 protocols using p s235 236 s6

1

Comprehensive Immune Cell Profiling

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Anti-human monoclonal antibodies were used against: CD3 (UCHT1), CD27 (LG.7F9), CD4 (RPA-T4), CD7 (4H9) and panαβTCR (IP26) from eBioscience; CD28 (CD28.2), CD8 (SK1), CD45 (HI30), Vδ2 (B6), CD3 (OKT3), CD45RA (HI100), Annexin-V and 7-AAD from Biolegend; panγδTCR (5A6.E9) from ThermoFisher; Vδ1 (REA173) from Miltenyi Biotech; p-S129-AKT, AKT, p-S9-GSK3β, GSK3β, p-S380-PTEN, PTEN, p-S235/236-S6 and S6 from Cell Signaling; Calnexin and GAPDH from Sicgen; 7-AAD from Invitrogen and Bcl-2 from Dako. Recombinant human sCD27 ligand and recombinant human IL-2 were purchased from Peprotech; CX-4945 (Silmitasertib) from Adooq Bioscience and Biorbyt; TBB from Sigma; TG-003 and Harmine from Focus Biomolecules.
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2

Western Blot Analysis of Signaling Pathways

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Cells were rinsed once with ice-cold PBS and lysed in ice-cold lysis buffer (50 mM HEPES [pH 7.4], 40mM NaCl, 2mM EDTA, 1.5mM sodium orthovanadate, 50mM NaF, 10mM pyrophosphate, 10mM glycerophosphate, and 1% Triton X-100, and one tablet of EDTA-free complete protease inhibitors [Roche] per 25ml). Cell lysates were cleared by centrifugation at 13,000rpm for 10 min. Proteins extracts were denatured by the addition of sample buffer, boiled for 5min, resolved by SDS-PAGE, and analyzed by immunoblotting. Western blot analyses were performed according to standard procedures. Antibodies from Cell Signaling were used for detection of P-T389-S6K1 (#9234), S6K1 (#2708), P-S235/236-S6 (#2211), S6 (#2217), P-T37/46-4EBP1 (#2855), 4EBP1 (#9644), P-T308-AKT (#2965), P-S743-AKT (#4060), AKT (#4691). For detection of β-actin we used an antibody from Sigma (#A5441).
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3

Investigating mTOR Signaling Pathway

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NIH3T3 cells and COS-7 cells were purchased from American Type Culture Collection (ATCC) and used within six months after cells were ordered. These cell lines were not authenticated in our laboratory. Rapamycin, 5-Bromo-2′-deoxyuridine (BrdU) and cycloheximide were obtained from Sigma. PF-4708671 was purchased from Selleckchem. MG132 was purchased from CalBiochem. Antibodies directed against Myc-tag (9E10), Flag-tag, and HA-tag were obtained from Covance. Antibodies directed against VPS34 (cat#4263), VPS15 (cat#14580), Beclin 1 (cat#3495), pT389-S6K1 (cat#9234), S6K1 (cat#2708), pT37/46-4EBP1 (cat#2855), 4EBP1 (cat#9644), pS235/236-S6 (cat#4858), S6 (cat#2217), pErk1/2 (cat#4370), Erk1/2 (cat#4695), pS473-Akt(cat#4060), Akt (cat#4685), RheB (cat#13879), TSC1 (cat#6935), TSC2 (cat#4308), BrdU (cat#5292), and Cyclin E (cat#4129) were purchased from Cell Signaling Technology. Fluorescently tagged antibodies were obtained from Invitrogen. The class III PI3K lipid kinase ELISA kit was purchased from Echelon Biosciences. The RheB activation kit was purchased from Abcam. 4-6 weeks old SCID mice were ordered from National Cancer Institute (NCI), NIH (Bethesda, MD).
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