Biological Activity
gzd824 is an orally bioavailable inhibitor of bcr-abl with ic50 values of 0.34 and 0.68 nm for bcr-ablwt and bcr-ablt315i, respectively [1].bcr-abl is a fused protein that interacts with the interleukin-3 receptorβ(c) subunit and has tyrosine kinase activity. abl activates cell cycle-related proteins and enzymes and increases cell division. bcr-abl inhibits dna repair and causes genomic instability.gzd824 is an orally bioavailable bcr-abl inhibitor. gzd824 exhibited high affinity with kd values of 0.32 and 0.71 nm for bcr-ablwt and bcr-ablt315i, respectively. gzd824 inhibited bcr-abl with ic50 values of 0.34, 0.68, 0.27, 0.71, 0.15, 0.35, 0.29 and 0.35 nm for bcr-ablwt, bcr-ablt315i, bcr-able255k, bcr-ablg250e, bcr-ablq252h, bcr-ablh396p, bcr-ablm351t and bcr-ably253f, respectively. in a competitive binding assay, gzd824 bound to the atp-binding sites of native abl with kd values of 0.32 and 0.34 nm for non-phosphorylated and phosphorylated abl. in stably transformed ba/f3 cells, gzd824 potently inhibited cells growth with ic50 values of 1.0 and 7.1 nm for bcr-ablwt and bcr-ablt315i expressed cells, respectively [1].in mouse xenograft tumor models, gzd824 inhibited tumor growth. in mice bearing an allograft leukemia model, gzd824 significantly increased survival [1].
References
ren x, pan x, zhang z, et al. identification of gzd824 as an orally bioavailable inhibitor that targets phosphorylated and nonphosphorylated breakpoint cluster region-abelson (bcr-abl) kinase and overcomes clinically acquired mutation-induced resistance against imatinib. j med chem, 2013, 56(3): 879-894.
