(±)-Zanubrutinib ((±)-BGB-3111) is a potent, selective and orally available Bruton's tyrosine kinase (Btk) inhibitor. In Vitro In both biochemical and cellular assays, (±)-Zanubrutinib ((±)-BGB-3111) demonstrates nanomolar Btk inhibition activity. In several MCL and DLBCL cell lines, (±)-Zanubrutinib inhibits BCR aggregation-triggered Btk autophosphorylation, blocks downstream PLC-γ2 signaling, and potently inhibits cell proliferation. In comparison with PCI-32765, (±)-Zanubrutinib shows much more restricted off-target activities against a panel of kinases, including ITK. MCE has not independently confirmed the accuracy of these methods. They are for reference only. In Vivo (±)-Zanubrutinib induces dose-dependent anti-tumor effects against REC-1 MCL xenografts engrafted either subcutaneously or systemically via tail vein injection in mice. In the subcutaneous xenografts. Preliminary 14-day toxicity study in rats shows that (±)-Zanubrutinib is very well tolerated and maximal tolerate dose (MTD) is not reached when it is dosed up to 250mg/kg/day . MCE has not independently confirmed the accuracy of these methods. They are for reference only. Form:Solid