IXA62 is an orally active and selective IRE1/XBP1s activator (EC50 = 0.31 μM) that reduces Aβ secretion. IXA62 enhances glucose-stimulated insulin secretion from rat insulinoma cells.
PAIR2 is a potent and selective partial antagonist of IRE1α RNase. PAIR2 can completely occupy IRE1α’s ATP-binding site in cells and block the ability of a potent KIRA to inhibit XBP1 splicing.
KIRA9 is a potent IRE1 inhibitor (IC50=4.8 μM in INS-1 cells). KIRA9 is able to fully engage the ATP-binding site of IRE1α. KIRA9 can block ER-localized mRNA decay and apoptosis.
A novel potent IRE1α-selective kinase inhibitor that inhibits both the kinase and RNase activities of IRE1α with IC50 of 20 nM and 200 nM, respectively; binds to pIRE1α and inhibits XBP 1 splicing; only weakly inhibits Ron (IC50= 4.4 uM) and FGFR1 V561M (IC50=17 uM) in a panel of 284 kinases.