Discovery of Potent, Selective Stem Cell Factor Receptor/Platelet Derived Growth Factor Receptor Alpha (c-KIT/PDGFRα) Dual Inhibitor for the Treatment of Imatinib-Resistant Gastrointestinal Stromal Tumors (GISTs)
作者:Yanli Lu、Fei Mao、Xiaokang Li、Xinyu Zheng、Manjiong Wang、Qing Xu、Jin Zhu、Jian Li
DOI:10.1021/acs.jmedchem.7b00468
日期:2017.6.22
Stem cell factor receptor (c-KIT) and platelet derived growth factor receptor alpha (PDGFR alpha) kinasts play an important role in gastrointestinal stromal tumors (GISTs). Here, we have discovered an c-KIT/PDGFR alpha dual inhibitor, compound 31, with single-digit nanomolar potency against c-KIT and PDGFRa. Compared to Imatinib (1), 31 showed better antiproliferative efficacy against various TEL-c-KIT/PD GFR alpha-BaF3 isogenic cells, including three 1-resistant BaF3 cell lines, as well as against GIST-T1 and GIST-882 cell lines. Furthermore, compound 31 showed a good KinomeScan selectivity (468 kinases) (S score (1) = 0.01 at 1 mu M concentration), good metabolic stability in liver microsomes, and no hERG inhibitory activity. It was worth noting that 31 inhibited GIST-T1 tumor growth (TGI = 81.5%) and even the BaF3-TEL-cKIT-T6701 tumor progression (TGI = 41.9%, 1-resistant GISTs) at a dosage of 100 mg/kg/day without exhibiting apparent toxicity.