Discovery of the Novel Potent and Selective FLT3 Inhibitor 1-{5-[7-(3- Morpholinopropoxy)quinazolin-4-ylthio]-[1,3,4]thiadiazol-2-yl}-3-<i>p</i>-tolylurea and Its Anti-Acute Myeloid Leukemia (AML) Activities<i>in Vitro</i>and<i>in Vivo</i>
作者:Wei-Wei Li、Xiao-Yan Wang、Ren-Lin Zheng、Heng-Xiu Yan、Zhi-Xing Cao、Lei Zhong、Ze-Rong Wang、Pan Ji、Ling-Ling Yang、Li-Jiao Wang、Yong Xu、Jing-Jing Liu、Jiao Yang、Chun-Hui Zhang、Shuang Ma、Shan Feng、Qi-Zheng Sun、Yu-Quan Wei、Sheng-Yong Yang
DOI:10.1021/jm300042x
日期:2012.4.26
Structure-activity relationship (SAR) studies of 2-(quinazolin-4-ylthio)thiazole derivatives, which are for optimizing the in vitro and in vivo antiacute myeloid leukemia (AML) activity of a previously identified FLT3 inhibitor 2-(6,7-dimethoxyquinazolin-4-ylthio)thiazole (1), are described. SAR studies centering around the head (thiazole) and tails (6- and 7-positions) of the quinazoline moiety of 1 led to the discovery of a series of compounds that exhibited significantly dincreased potency against FLT3-driven AML MV4-11 cells. Preliminary in vivo assays were carried out on three highly active compounds, whose results showed that 1-5-[7-(3-morpholinopropoxy)quinazolin-4-ylthio]-[1,3,4]thiadiazol-2-yl}-3-p-tolylurea (20c) had the highest in vivo activity. Further in vitro and in vivo anti-AML studies were then performed on 20c; in an MV4-11 xenograft mouse model, a once-daily dose of 20c at 100 mg/kg for 18 days led to complete tumor regression without obvious toxicity. Western blot and immunohistochemical analysis were carried out to illustrate the mechanism of action of 20c.