High-Affinity Epidermal Growth Factor Receptor (EGFR) Irreversible Inhibitors with Diminished Chemical Reactivities as Positron Emission Tomography (PET)-Imaging Agent Candidates of EGFR Overexpressing Tumors
作者:Eyal Mishani、Galith Abourbeh、Orit Jacobson、Samar Dissoki、Revital Ben Daniel、Yulia Rozen、Mazal Shaul、Alexander Levitzki
DOI:10.1021/jm0580196
日期:2005.8.1
with the anilinoquinazoline epidermal growth factor receptor (EGFR) irreversible inhibitor [(11)C]-ML03 demonstrated a rapid metabolism of the tracer, which led to its low in vivo accumulation in EGFR overexpressing tumors. To enhance tumor uptake, the chemical structure of the compound was modified, and four new groups of EGFR inhibitors with a wide range of chemical reactivities were synthesized.
先前使用苯胺基喹唑啉表皮生长因子受体(EGFR)不可逆抑制剂[(11)C] -ML03进行的研究表明示踪剂的快速代谢,导致其在EGFR过表达的肿瘤中的体内蓄积量较低。为了增强肿瘤吸收,对化合物的化学结构进行了修饰,并合成了四组具有广泛化学反应性的新的EGFR抑制剂。用还原型谷胱甘肽(GSH)进行的化合物的化学反应活性分析表明,C组(4-(二甲氨基)-丁-2-烯酰胺)衍生物对GSH的亲核攻击具有最低的化学反应性。尽管如此,它显示出高抑制力并且不可逆地与EGFR结合。因此,研究了用(11)C标记的C族化合物(5a,ML04)的血液稳定性。在60分钟内,在血液中未检测到放射性代谢物。[[11)C] -5a的稳定性,无论是从体外血液稳定性测定还是裸鼠注射中均显示,与[(11)C] -ML03相比,稳定性显着更高。由于C组对肿瘤的积累有更大的希望,因此,它代表了最适合使用长寿命正电子发射断层扫描(P