TFEB activator 1 is an orally effective, mTOR-independent activator of TFEB. TFEB activator 1 significantly promotes the nuclear translocation of Flag-TFEB with an EC50 of 2167 nM. TFEB activator 1 enhances autophagy without inhibiting the mTOR pathway and has the potential for neurodegenerative diseases treatment.IC50 & Target: EC50: 2167 nM (Flag-TFEB nuclear translocation)In Vitro: TFEB activator 1 (Compound C1) activates TFEB (transcription factor EB) by directly binding to TFEB and promotes its entry into the nucleus, without affecting TFEB phosphorylation or inhibiting the activities of MTOR and MAPK1/ERK2-MAPK3/ERK1.
TFEB activator 1 (1 μM; for 12 h) significantly increases the levels of LC3B-II, the lipidated and phagophore- or autophagosome-associated form of MAP1LC3B/LC3B (microtubule-associated protein 1 light chain 3 β) in N2a cells.
TFEB activator 1 (0.2-1 μM) dose-dependently increases the levels of LC3-II and SQSTM1/p62 (sequestosome 1) in N2a cells.In Vivo: The medium lethal dose (LD50) value of TFEB activator 1 (Compound C1) is 175 mg/kg in the acute toxicity assay (single-dose i.v. tail vein injection; in rats) .
Short-term oral administration of TFEB activator 1 (low dosage 10 mg/kg and high dosage 25 mg/kg; for 24 h) dose-dependently increases the expression of LC3B-II and TFEB in the liver, frontal cortex and striatum of the brain.
Chronic administration of TFEB activator 1 (10 mg/kg per day; orally administered by gavage) activates TFEB and enhances autophagy in rat brains.