JR-AB2-011 is a selective mTORC2 inhibitor with an IC 50 value of 0.36 μM. JR-AB2-011 inhibits mTORC2 activity by blocking Rictor-mTOR association ( K i : 0.19 μM) and is cytotoxic in glioblastoma [1].

mTORC2:0.36 μM

JR-AB2-011 (1 μM; 24 hours) shows good anti-GBM properties, blocks mTORC2 signaling and Rictor association with mTOR [1]. JR-AB2-011 (0.5-2 μM; 48 hours) displays the least toxicity to normal neurons with no significant cytotoxic effects for concentrations up to 10 mM compared to CID613034 [1]. Apoptosis Analysis [1] Cell Line: U87 GBM cells; LN229 GBM cells Concentration: 1 μM Incubation Time: 24 hours Result: Had good anti-GBM properties and blocked mTORC2 signaling and Rictor association with mTOR. Cell Cytotoxicity Assay [1] Cell Line: Normal mature human neurons Concentration: 0.5, 1, 2 μM Incubation Time: 48 hours Result: Displayed the least toxicity to normal neurons with no significant cytotoxic effects for concentrations up to 10 mM.

Mice receiving JR-AB2-011 (4 mg/kg; daily i.p. for 10 days; 20 mg/kg; daily i.p. for 10 days) at either dosing regimen show significant inhibition of tumor growth rate (JR-AB2-011 at 4 mg/kg/d; 74% inhibition at end of dosing period; tumor growth delay 10.0 days; JR-AB2-011 at 20 mg/kg/d; 80% inhibition at end of dosing period; tumor growth delay 12.0 days) as compared to mice receiving vehicle alone [1]. Animal Model: LN229 cells in female C.B.-17-scid (Taconic) mice [1] Dosage: 4 mg/kg; 20 mg/kg Administration: Daily i.p.; 10 days Result: Either dosing regimen displayed marked inhibition of tumor growth rate as compared to mice receiving vehicle alone.