循环二胺三醇 (CHDT) 功能化使得目标分子的标记能够用Al18F/68Ga/111In标记
Wiebke Sihver1, Martin Walther1, Martin Ullrich1
1Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328 Dresden, Germany.
Bioconjugate chemistry
|August 26, 2024
概括
一种新型的循环二胺三醇 (CHDT) 分组使小分子和的放射标记能够有效地实现Al18F,68Ga和111. 这一进步为分子成像应用提供了改善的体内性能.
科学领域:
- 放射化学和药物化学的研究.
- 分子成像和放射药理学
背景情况:
- Al18F标签为放射性化生物分子提供了一步式方法,其中 (±) -H2RESCA允许环境温度标签.
- 与蛋白质相比,对小分子和的 (±) -H2RESCA的应用仍未得到充分探索.
研究的目的:
- 通过点击化学开发一种新的化单元,用于生物分子的后期功能化.
- 评估新部分对标记Al18F,68Ga和111In.的有用性.
- 评估用于分子成像的新型放射性标记PSMA抑制剂的体外和体内性能.
主要方法:
- 将一个基因部分引入一个非环 pentadentate 连接体,以创建循环二胺三醇 (CHDT) 部分.
- 三种新型CHDT功能化的PSMA抑制剂的合成.
- 用Al18F,68Ga和111In进行放射性标记,然后进行体外表征,在人血清中进行稳定性研究,并在小鼠模型中进行体内PET成像.
主要成果:
- 该CHDT部分证明了Al18F,68Ga,和111In. 的稳定复杂化.
- 所有放射性金属复合体在体外表现出高的动力惰性.
- 在体内,Al[18F]F-CHDT-PSMA-1的性能与[18F]PSMA-1007的性能相当,瘤与血液和瘤与肌肉的比率更高.
结论:
- 新型CHDT部分适用于小分子和的功能化和放射性标记,使用Al18F,68Ga和111In.
- 三醇环似乎为分子成像赋予了有利的药理动力学特性.
- 这种方法推进了放射性标记策略,用于开发新的诊断和治疗药物.
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