ISRIB (trans-isomer)

PERK:5 nM

ISRIB shows favorable properties in pharmacokinetic profiling experiments and good bioavailability in vivo. ISRIB (0.25 mg/kg i.p.) increases long-term memory in mice by enhancing spatial and fear-associated learning. [1]

ISRIB blocks production of endogenous ATF4, whereas XBP1 mRNA splicing and XBP1s production persisted. ISRIB prevents cells from re-establishing ER homeostasis by blocking signaling through the PERK branch of the UPR, and decreases the viability of cells that are subjected to ER-stress. [1]

DMSO:1.11 mg/mL (2.46 mM),Sonification is recommended.

U2OS cells are plated on 96-well plates and left to recover overnight. Cells are treated with either with 2 μg/ml tunicamycin or 100 nM thapsigargin in the presence or absence of 100 nM ISRIB or with ISRIB alone for the indicated and the level of eIF2α phosphorylation is determined[1].