Description
IPI-145 (INK1197) is a novel and selective PI3K δ/γ inhibitor with Ki and IC50 of 23 pM/243 pM and 1 nM/50 nM, highly selective for PI3K δ/γ than other protein kinases. Phase 2.
Storage
2 years -20 centigrade Powder; 2 weeks 4 centigrade in DMSO; 6 months -80 centigrade in DMSO.
IC50
23 pM (IC50)/1 nM (Ki); 243 pM (IC50)/50 nM Ki
Molecular Formula
C22H17ClN6O
Chemical Name
1(2H)-Isoquinolinone, 8-chloro-2-phenyl-3-[(1S)-1-(9H-purin-6-ylamino)ethyl]-
Solubility
DMSO 84 mg/mL; Water <1 mg/mL; Ethanol <1 mg/mL
In vitro
IPI-145 suppresses murine/human B-cell proliferation with EC50 of 0.5 nM/0.5 nM and also inhibits human T-cell proliferation with EC50 of 9.5 nM.
In vivo
IPI-145 (10 mg/kg, p.o.) shows well pharmacokinetics with Cmax and AUC of 390 ng/mL and 137 ng•h/mL in mouse and rat. IPI-145 (10 mg/kg) is active in murine DTH model with ~50% ear swelling. IPI-145 (10 mg/kg) demonstrates dose-dependent effect in rat collagen induced arthritis (CIA) model. IPI-145 prevents inflammation and protects joint bone and cartilage in the rat CIA model. IPI-145 (10 mg/kg,QD) demonstrates activity in rat adjuvant induced polyarthritis model.
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