PRN 1008

Cas No.:	1575596-29-0
Chemical Name:	(R,E)-2-(3-(4-amino-3-(2-fluoro-4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carbonyl)-4-methyl-4-(4-(oxetan-3-yl)piperazin-1-yl)pent-2-enenitrile
Synonyms:	PRN1008
SMILES:	NC1=C2C(C3=C(C=C(OC4=CC=CC=C4)C=C3)F)=NN([C@H]5CN(CCC5)C(/C(C#N)=C/C(C)(N6CCN(C7COC7)CC6)C)=O)C2=NC=N1
Formula:	C36H40FN9O3
M.Wt:	665.774
Purity:	>98%
Sotrage:	2 years -20°C Powder, 2 weeks 4°C in DMSO, 6 months -80°C in DMSO

Description:	PRN1008 is a reversible covalent inhibitor of Bruton’s Tyrosine Kinase (BTK), with an IC50 of 1.3 nM.
Target:	BTK:1.3 nM (IC50) BMX:1.0 nM (IC50) ITK:440 nM (IC50) TEC:0.8 nM (IC50) RLK:1.2 nM (IC50) BLK:6.3 nM (IC50) EGFR:520 nM (IC50) ERBB2:3900 nM (IC50) ERBB4:11.3 nM (IC50)
In Vivo:	In vivo PRN1008 demonstrates enduring pharmacodynamic effects after the compound has cleared from circulation, consistent with extended target residence time. PRN1008 also reverses and completely suppresses collagen-induced arthritis in rats in a dose dependent manner which allows correlation of target occupancy and disease modification[2].
In Vitro:	PRN1008 is a reversible covalent inhibitor of Bruton’s Tyrosine Kinase (BTK), with an IC50 of 1.3±0.5 nM. PRN1008 is also found to be highly selectively when tested in a panel of 251 other kinases. Cysteine targeting of BTK by PRN1008 results in a slow off-rate demonstrated by retention of 79±2% of binding to BTK in PBMC 18 hours after washing away the compound in vitro. The covalent cysteine binding is completely reversible after denaturation of the target. Anti-IgM induces human B cell proliferation (10% serum) and B cell CD69 expression are inhibited by PRN1008 with IC50 of 5±2.4 nM and 123±38 nM, respectively[2].
References:	[1]. Smith PF, et al. A phase I trial of PRN1008, a novel reversible covalent inhibitor of Bruton's tyrosine kinase, in healthy volunteers. Br J Clin Pharmacol. 2017 Nov;83(11):2367-2376. [2]. Hill RJ, Bradshaw JM, Bisconte A, Tam D, Owens TD, Brameld KA, Smith PF, Funk JO, Goldstein DM, Nunn PA. Preclinical Characterization of PRN1008, a Novel Reversible Covalent Inhibitor of BTK that Shows Efficacy in a RAT Model of Collagen-Induced Arthritis. Annals of the Rheumatic Diseases 2015; 74(Suppl 2): 216.