Pteroyl-Lys-DAV-DOTA, were designed, synthesized and radiolabeled with (68) Ga. Biological evaluations of the two radiotracers were performed with FR-positive KB cell line and athymic nude mice bearing KB tumors. Both (68) Ga-DOTA-Lys-Pteroyl and (68) Ga-DOTA-DAV-Lys-Pteroyl exhibited receptor specific binding in KB cells in vitro. The tumor uptake values of (68) Ga-DOTA-Lys-Pteroyl and (68) Ga-DOTA-DAV-Lys-Pteroy
为了开发用于叶酸受体成像的新型 (68) Ga 标记 PET 示踪剂,设计、合成了两种 DOTA 缀合的 Pteroyl-Lys 衍
生物 Pteroyl-Lys-DOTA 和 Pteroyl-Lys-
DAV-DOTA,并用(68 ) Ga。两种放射性示踪剂的
生物学评价是用 FR 阳性 KB
细胞系和带有 KB 肿瘤的无胸腺裸鼠进行的。(68) Ga-DOTA-Lys-Pteroyl 和 (68) Ga-DOTA-
DAV-Lys-Pteroyl 在体外 KB 细胞中表现出受体特异性结合。(68) Ga-DOTA-Lys-Pteroyl 和 (68) Ga-DOTA-
DAV-Lys-Pteroy 在注射后 2 小时的肿瘤摄取值为 10.06 ± 0.59%ID/g 和 11.05 ± 0.60%ID/g , 分别。在注射后 2 小时,通过 Micro-PET 成像,用 (68) Ga-DOTA-
DAV-Lys-Pteroyl