A Conformational Restriction Strategy for the Identification of a Highly Selective Pyrimido-pyrrolo-oxazine mTOR Inhibitor
作者:Chiara Borsari、Denise Rageot、Alix Dall’Asen、Thomas Bohnacker、Anna Melone、Alexander M. Sele、Eileen Jackson、Jean-Baptiste Langlois、Florent Beaufils、Paul Hebeisen、Doriano Fabbro、Petra Hillmann、Matthias P. Wymann
DOI:10.1021/acs.jmedchem.9b00972
日期:2019.9.26
ATP-competitive mTOR kinase inhibitors (TORKi) have the potential to overcome limitations of rapamycin derivatives in a wide range of malignancies. Herein, we exploit a conformational restriction approach to explore a novel chemical space for the generation of TORKi. Structure–activity relationship (SAR) studies led to the identification of compound 12b with a ∼450-fold selectivity for mTOR over class I
雷帕霉素(mTOR)的机械靶标在生长和肿瘤进展中起着关键作用,并且是治疗癌症的有吸引力的靶标。ATP竞争性mTOR激酶抑制剂(TORKi)有潜力克服雷帕霉素衍生物在多种恶性肿瘤中的局限性。在本文中,我们利用构象限制方法探索了一种新的化学空间,用于产生TORKi。结构-活性关系(SAR)研究导致鉴定出与I类PI3K同工型相比,对mTOR的选择性约为450倍的化合物12b。在雄性Sprague Dawley大鼠中进行的药代动力学研究表明,口服给药后良好的暴露量和最低的脑渗透率。CYP450反应型表型指出12b的高代谢稳定性。这些结果确定了三环嘧啶基-吡咯并恶嗪部分是开发用于癌症治疗的高选择性mTOR抑制剂的新型支架。