Inhibition of Hypoxia-Induced Gene Transcription by Substituted Pyrazolyl Oxadiazoles: Initial Lead Generation and Structure-Activity Relationships
作者:Michael Härter、Karl-Heinz Thierauch、Stephen Boyer、Ajay Bhargava、Peter Ellinghaus、Hartmut Beck、Susanne Greschat-Schade、Holger Hess-Stumpp、Kerstin Unterschemmann
DOI:10.1002/cmdc.201300357
日期:2014.1
The transcription factors hypoxia‐inducible factor‐1 and ‐2 (HIF‐1 and HIF‐2) orchestrate a multitude of processes that allow tumor cells to survive under conditions of low oxygen and nutrients, and that lead to resistance to some apoptotic pathways and facilitate invasion and metastasis. Therefore, inhibition of transactivation by HIF has become an attractive target in cancer research. Herein we present
转录因子低氧诱导因子-1和-2(HIF-1和HIF-2)编排了许多过程,这些过程使肿瘤细胞在低氧和营养的条件下能够存活,并导致对某些凋亡途径和抗性的抵抗。促进侵袭和转移。因此,HIF抑制反式激活已经成为癌症研究中有吸引力的目标。本文中,我们介绍了基于细胞的筛选方法的结果,该方法导致发现了取代的1 H-吡唑-3-羧酰胺。描述了针对功效和代谢稳定性的命中类别的化学优化;它产生了新颖的5‐(1 H吡唑-3-基)-1,2,4-恶二唑抑制缺氧诱导的HIF-1α和HIF-2α积累。将筛选细胞系统中的HIF抑制能力从IC 50 190提高到0.7 n M,并披露了SAR的重要部分。对于关键化合物,在A549人肺腺癌细胞中研究了抑制缺氧诱导的HIF目标基因表达的能力。静脉内和口服给药后,相同的化合物在大鼠中显示出有利的药代动力学特征。