Remibrutinib (LOU064) is a potent and highly selective covalent Inhibitor of Bruton's Tyrosine Kinase (BTK) with IC50 value of 1 nM. LOU064 (Remibrutinib) exhibits an exquisite kinase selectivity due to binding to an inactive conformation of BTK and has the potential for a best-in-class covalent BTK inhibitor for the treatment of autoimmune diseases. LOU064 (Remibrutinib) demonstrates potent in vivo target occupancy with an EC90 of 1.6 mg/kg and dose-dependent efficacy in rat collagen-induced arthritis.
|Cell lines||human monocytic cell line THP1, Human Blood B cell and Basophil|
|Preparation method||The effects of LOU064 on signaling from the activating FcγR are assessed in the human monocytic cell line THP1 (ATCC, TIB-202). The THP1 cell line expresses the two activating FcγRs CD32a (FcγRII2) and CD64 (FcγRI) that signal through BTK. Briefly, 384 well culture plates are coated with pooled non-specific human IgG fraction. Serial compound dilutions are dispensed into the IgG-coated plates containing a small volume of tissue culture medium. Then THP1 cells that are pre-differentiated by vitamin D3 treatment for 5 days are added to each well. Twenty-four hours later the secretion of IL-8 in the supernatant of these culture wells is assessed by a homogenous immunoassay.|
|Concentrations||3 nM, 10 nM, 30 nM, 100 nM, 300 nM|
|Incubation time||25 min, 50 min, 75 min, 100 min|
|Animal models||Female Lewis rats, female C57BL/6 mice, male beagle dog|
|Dosages||1 mg/kg, 3 mg/kg|
|Administration||i.v. or p.o. administration|
|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 Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 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 Compound A of 10 mg/kg.
|Solubility||DMSO 100 mg/mL|
|Related BTK Products|
Rilzabrutinib, also known as PRN1008, is a reversible covalent, selective and oral active inhibitor of Bruton’s Tyrosine Kinase (BTK) with IC50 of 1.3 nM.
Pirtobrutinib (LOXO-305; LY 3527727; RXC-005) is a highly selective and non-covalent next generation BTK inhibitor, which inhibits diverse BTK C481 substitution mutations. Pirtobrutinib is also more than 300-fold selective for BTK versus 370 other kinases.
Tolebrutinib, also known as SAR442168, is a Bruton tyrosine kinase (BTK) inhibitor, with IC50 values of 0.4 nM and 0.7 nM in Ramos B cells and HMC microglia cells, respectively.
Orelabrutinib is an orally active and irreversible inhibitor of Bruton's tyrosine kinase (BTK).
Zanubrutinib (BGB-3111) is a potent and highly selective small molecule inhibitor of Bruton's tyrosine kinase (BTK).
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