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- Title
[<sup>11</sup>C]Carboxylated Tetrazines for Facile Labeling of Trans‐Cyclooctene‐Functionalized PeptoBrushes.
- Authors
García‐Vázquez, Rocío; Battisti, Umberto Maria; Shalgunov, Vladimir; Schäfer, Gabriela; Barz, Matthias; Herth, Matthias Manfred
- Abstract
Functionalization of macromolecules (antibodies, polymers, nanoparticles) with click‐reactive groups greatly enhances the versatility of their potential applications. Click chemistry based on tetrazine – trans‐cyclooctene (TCO) ligation is especially promising and is already widely applied for pretargeted imaging and therapy. Indirect radiolabeling of TCO‐functionalized macromolecules with substoichiometric amounts of radioactive tetrazines is a convenient way to monitor the fate of those macromolecules by means of positron emission tomography (PET) imaging after their administration into the test subject. In this work, the preparation is reported of TCO‐containing graft copolymers, namely PeptoBrushes (polyglutamic acid‐graft‐polysarcosine), novel [11C]carboxylated tetrazines, and their combined use in radiolabeling the polymer by inverse electron demand Diels Alder reaction, to investigate it is potential for an application in pretarget imaging or injectable brachytherapy. The procedure for [11C]tetrazine production is easy and scalable, while indirect TCO‐PeptoBrushes labeling with these [11C]tetrazines is mild, fast, and quantitative. This strategy allows facile 11C‐labeling of diverse TCO‐functionalized macromolecules, so that their localization and distribution shortly after injection can be assessed by PET.
- Subjects
GRAFT copolymers; POSITRON emission tomography; CLICK chemistry; MACROMOLECULES
- Publication
Macromolecular Rapid Communications, 2022, Vol 43, Issue 12, p1
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.202100655