体内分布
化学
谷氨酸羧肽酶Ⅱ
内化
前列腺癌
放射性配体
癌症研究
药代动力学
体内
体外
药理学
癌症
医学
生物化学
内科学
受体
生物
生物技术
作者
Yong Huang,Hongsheng Li,Shimin Ye,Ganghua Tang,Yin Liang,Kongzhen Hu
标识
DOI:10.1016/j.ejmech.2021.113502
摘要
Prostate-specific membrane antigen (PSMA) has become as an outstanding prostate cancer-related target for diagnostic imaging and targeted radiotherapy. Clinical studies on a few PSMA radiotracers are currently underway to determine their efficacy as imaging agents to detect prostate cancer. To improve tumor retention and tumor-to-normal tissue contrast, we herein report the synthesis and preclinical evaluation of an Al18F-labeled bivalent PSMA ligand (18F-Bi-PSMA). 18F-Bi-PSMA was successful automated preparation and in vitro evaluation showed that 18F-Bi-PSMA was potent binding affinity, high specificity, and rapid internalization in PSMA-expressing cells. Biodistribution studies revealed a high and specific tumor uptake of 20.5 ± 3.5 %ID/g in 22Rv1 tumor-bearing mice. Furthermore, compared to the clinically used monomeric PSMA-targeting tracers, 68Ga-PSMA-11 and 18F-PSMA-1007, 18F-Bi-PSMA exhibited improved pharmacokinetics and higher tumor uptake, as well as better tumor-to-normal tissue contrast, resulting in considerably high imaging quality. Our findings indicated that the bivalent PSMA radioligand, 18F-Bi-PSMA, was successfully synthesized and ideal imaging properties.
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