Hay Michael P, Hicks Kevin O, Pchalek Karin, Lee Ho H, Blaser Adrian, Pruijn Frederik B, Anderson Robert F, Shinde Sujata S, Wilson William R, Denny William A
Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand.
J Med Chem. 2008 Nov 13;51(21):6853-65. doi: 10.1021/jm800967h. Epub 2008 Oct 11.
A series of novel tricyclic triazine-di- N-oxides (TTOs) related to tirapazamine have been designed and prepared. A wide range of structural arrangements with cycloalkyl, oxygen-, and nitrogen-containing saturated rings fused to the triazine core, coupled with various side chains linked to either hemisphere, resulted in TTO analogues that displayed hypoxia-selective cytotoxicity in vitro. Optimal rates of hypoxic metabolism and tissue diffusion coefficients were achieved with fused cycloalkyl rings in combination with both the 3-aminoalkyl or 3-alkyl substituents linked to weakly basic soluble amines. The selection was further refined using pharmacokinetic/pharmacodynamic model predictions of the in vivo hypoxic potency (AUC req) and selectivity (HCD) with 12 TTO analogues predicted to be active in vivo, subject to the achievement of adequate plasma pharmacokinetics.
已设计并制备了一系列与替拉扎明相关的新型三环三嗪二氮氧化物(TTOs)。一系列结构排列包括与三嗪核心稠合的环烷基、含氧和含氮饱和环,再加上连接到任一半球的各种侧链,产生了在体外显示出缺氧选择性细胞毒性的TTO类似物。通过将稠合环烷基环与连接到弱碱性可溶性胺的3-氨基烷基或3-烷基取代基相结合,实现了最佳的缺氧代谢速率和组织扩散系数。利用药代动力学/药效学模型对体内缺氧效力(AUC req)和选择性(HCD)进行预测,对12种预计在体内具有活性的TTO类似物进行了进一步筛选,前提是要实现足够的血浆药代动力学。