937263-43-9

Year of discovery: 2006
Year of introduction: 2020
Discovered by: Array BioPharma
Developed by: Array BioPharma
Primary targets: HER2
Binding type: I/II
Class: receptor tyrosine kinase
Treatment: HER2-positive breast cancer
Other names: ONT-380, ARRY-380
Oral bioavailability = not reported
Elimination half-life = 5.4 hours
Protein binding = 97%

N6-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)-N4-[3-methyl-4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)phenyl]-4,6-quinazolinediamine is a novel?diarylamine ErbB inhibitor.

Store at -20°C

Tucatinib binds to tyrosine kinase (an enzyme) of HER2, reducing PI3-kinase and MAP-kinase signaling. In vitro, tucatinib inhibits phosphorylation of HER2 and HER3, resulting in inhibition of downstream MAPK and AKT signaling and cell proliferation, and showed anti-tumor activity in HER2 expressing tumor cells. In vivo, tucatinib inhibited the growth of HER2 expressing tumors. The combination of tucatinib and trastuzumab showed increased anti-tumor activity in vitro and in vivo compared to either drug alone.