Evaluation of [ 18 F]-ATRi as PET tracer for in vivo imaging of ATR in mouse models of brain cancer
作者:Giuseppe Carlucci、Brandon Carney、Ahmad Sadique、Axel Vansteene、Jun Tang、Thomas Reiner
DOI:10.1016/j.nucmedbio.2017.01.002
日期:2017.5
cell lines and ex vivo biodistribution were performed in subcutaneous U251 MG xenograft bearing athymic nude mice following microPET imaging. RESULTS [18F]-ATRi has a similar pharmacokinetic profile to that of Ve-821. Using an U251 MG glioblastoma mouse model, we evaluated the in vivo binding efficiency of [18F]-ATRi. Blood and tumor showed a statistically significant difference between mice injected
发生共济失调的毛细血管扩张症和Rad3相关(ATR)苏氨酸丝氨酸激酶是协调DNA损伤反应(DDR)的关键因素之一。因此,抑制ATR可以放大化学疗法和放射疗法的效果,并且几种ATR抑制剂(ATRi)已经在癌症中进行了临床测试。为了更准确地选择患者,进行监测和分期,对ATR进行实时体内成像可能是无价的。合适的显像剂的开发仍然是主要的挑战。方法3-氨基-N-(4- [18F]苯基)-6-(4-(甲基磺酰基)苯基)吡嗪-2-羧酰胺([18F] -ATRi),与Ve-821的相似类似物(临床与已经建立的合成程序类似,可以轻松完成ATRi候选程序)。在结构上,将18 F引入Ve-821芳香环的4位以生成标记的ATR抑制剂。在microPET成像后,在U251 MG胶质母细胞瘤细胞系中进行了体外实验,并在携带无胸腺裸鼠的皮下U251 MG异种移植物中进行了离体生物分布。结果[18F] -ATRi具有与V