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Design of Bimodal Ligands of Neurotensin Receptor 1 for Positron Emission Tomography Imaging and Fluorescence-Guided Surgery of Pancreatic Cancer.
Journal of Medicinal Chemistry ( IF 6.8 ) Pub Date : 2020-01-02 , DOI: 10.1021/acs.jmedchem.9b01407
Emma Renard 1 , Pierre-Alix Dancer 2 , Christophe Portal 3 , Franck Denat 1 , Aurélie Prignon 4 , Victor Goncalves 1
Affiliation  

Neurotensin receptor 1 (NTSR1) is overexpressed in most human pancreatic ductal adenocarcinomas. It makes it an attractive target for the development of pancreatic cancer imaging agents. In this study, we sought to develop a bimodal positron emission tomography (PET)/fluorescent imaging agent capable of specifically targeting these receptors. Starting from the structure of a known NTSR1 agonist, a series of tracers were synthesized, radiometalated with gallium-68, and evaluated in vitro and in vivo, in mice bearing an AsPC-1 xenograft. PET imaging allowed us to identify the compound [68Ga]Ga-NODAGA-Lys(Cy5**)-AEEAc-[Me-Arg8,Tle12]-NT(7-13) as the one with the most promising biodistribution profile, characterized by high tumor uptake (2.56 ± 0.97%ID/g, 1 h post-injection) and rapid elimination from nontargeted organs, through urinary excretion. Fluorescence imaging gave similar results. On this basis, fluorescence-guided resection of tumor masses was successfully carried out on a preclinical model.

中文翻译:

用于正电子发射断层显像和胰腺癌荧光引导手术的神经降压素受体1双峰配体的设计。

在大多数人的胰腺导管腺癌中,神经降压素受体1(NTSR1)过表达。它使其成为胰腺癌显像剂开发的有吸引力的目标。在这项研究中,我们试图开发一种能够特异性靶向这些受体的双峰正电子发射断层扫描(PET)/荧光成像剂。从已知的NTSR1激动剂的结构开始,合成了一系列示踪剂,用68镓进行了放射性金属化,并在带有AsPC-1异种移植物的小鼠中进行了体内和体外评估。PET成像使我们能够鉴定化合物[68Ga] Ga-NODAGA-Lys(Cy5 **)-AEEAc- [Me-Arg8,Tle12] -NT(7-13)是最有前途的生物分布图,其特征在于注射后1 h肿瘤吸收率高(2.56±0.97%ID / g,注射后1 h),并通过尿液排泄迅速从非目标器官清除。荧光成像得到相似的结果。在此基础上,成功地在临床前模型上进行了荧光引导的肿块切除术。
更新日期:2020-01-04
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