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Updated: Mar 27, 2026

Enhancing Efficiency and Radiolabeling Yields of Carbon-11 Radioligands for Clinical Research Using the Loop Method

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Linker Chemistry in Radiopharmaceutical Design.

Ava Stoddard^1,2,3, Kiarra Furey^1,2,3, Gina Dehlavi^1,3,4

¹Department of Chemistry, Hunter College, City University of New York, New York, New York 10065, United States.

Bioconjugate Chemistry

|March 26, 2026

Summary

This summary is machine-generated.

Linker chemistry is crucial for optimizing molecularly targeted bioconjugates in nuclear medicine. Innovations in linker design enhance probe performance for imaging and therapy, drawing lessons from antibody-drug conjugates.

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Area of Science:

Nuclear medicine
Radiopharmaceutical chemistry
Molecularly targeted bioconjugates

Background:

Molecularly targeted bioconjugates have transformed nuclear medicine over 50 years.
These probes, used in PET, SPECT, and therapy, consist of a targeting vector, radionuclide, labeling moiety, and linker.
Linkers are essential for stable in vivo attachment but are often overlooked.

Purpose of the Study:

To systematically review how linker chemistry optimizes radiopharmaceutical in vivo performance.
To highlight innovative linker strategies and nascent methodologies.
To explore cross-disciplinary lessons from antibody-drug conjugate development.

Main Methods:

Review of existing literature on radiopharmaceutical linker chemistry.
Analysis of strategies for altering linker hydrophobicity and bioavailability.
Discussion of stimuli-responsive linker cleavage mechanisms.

Main Results:

Linker structure significantly impacts probe hydrophobicity and bioavailability.
Innovative linker strategies are emerging, including stimuli-responsive designs.
Lessons from antibody-drug conjugate linkers offer valuable insights for radiopharmaceuticals.

Conclusions:

Linker chemistry is a critical, yet often underestimated, component in radiopharmaceutical design.
Optimizing linker properties can significantly enhance the efficacy of nuclear imaging and therapeutic probes.
Further research into advanced linker technologies, informed by other fields, holds great promise.