In vitro: In the in vitro signaling assay on primary human CLL cells, acalabrutinib inhibits tyrosine phosphorylation of downstream targets of ERK, IKB, and AKT. Acalabrutinib demonstrates higher selectivity for BTK with IC50 determinations on nine kinases with a cysteine residue in the same position as BTK. Importantly, unlike ibrutinib, acalabrutinib does not inhibit EGFR, ITK, or TEC. acalabrutinib has no effect on EGFR phosphorylation on tyrosine residues Y1068 and Y1173. Compared with ibrutinib, acalabrutinib has much higher IC50(>1000 nM) or virtually no inhibition on kinase activities of ITK, EGFR, ERBB2, ERBB4, JAK3, BLK, FGR, FYN, HCK, LCK, LYN, SRC, and YES1. In vivo: oral administration of ACP-196 in mice results in dose-dependent inhibition of anti-IgM-induced CD86 expression in CD19+ splenocytes with an ED50 of 0.34 mg/kg compared to 0.91 mg/kg for ibrutinib. A similar model is used to compare the duration of Btk inhibition after a single oral dose of 25 mg/kg. ACP-196 inhibits CD86 expression >90% at 3h postdose.
|Body Surface Area (m2)||0.007||0.025||0.15||0.05||0.02||0.5|
|Animal A (mg/kg) = Animal B (mg/kg) multiplied by||Animal B Km|
|Animal A Km|
For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.
|Solubility||93 mg/mL in DMSO|
Acalabrutinib (ACP-196): a selective second-generation BTK inhibitor.
Wu J, et al. J Hematol Oncol. 2016 Mar 9;9:21. PMID: 26957112.
Acalabrutinib (ACP-196) in Relapsed Chronic Lymphocytic Leukemia.
Byrd JC, et al. N Engl J Med. 2016 Jan 28;374(4):323-32. PMID: 26641137.
|Related BTK Products|
ONO-4059 is a highly selective, orally bioavailable BTK inhibitor with a potency (IC50) of 2.2 nM.
ONO-4059 (GS-4059) is highly potent and selective BTK inhibitor with an IC50 of 2.2 nM.
ONO-4059 analogue is the analog of ONO-4059, ONO-4059 is a highly potent and selective Btk inhibitor with IC50 of 23.9 nM.
RN486 is a Bruton's tyrosine kinase (Btk) inhibitor with an IC50 Value of 4.0 nM.
CGI1746 is a potent and highly selective small-molecule inhibitor of the Btk with IC50 of 1.9 nM.
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