hepatocarcinoma) and healthy rat hepatocytes has shown that the system containing the glutamine vector bound through the α‐carboxylic group displays a markedly higher affinity for tumor cells. The observed behavior is rationalized in terms of the exploitation of an additional glutamine transporter active in hepatic tumor cells.
合成了三种靶向谷
氨酰胺转运蛋白的新型磁共振成像探针。它们由一个Gd-DOTA-单酰胺部分(DOTA =
1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸)组成,它通过六个碳原子链连接到一个由谷
氨酰胺残基结合的载体上通过α-羧基,γ-羧酰胺基或α-
氨基官能团。HTC(大鼠肝癌)和健康的大鼠肝细胞对它们的摄取表明,含有通过α-羧基结合的谷
氨酰胺载体的系统对肿瘤细胞的亲和力明显更高。通过利用在肝肿瘤细胞中有活性的其他谷
氨酰胺转运蛋白,使观察到的行为合理化。