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Ultra-Radiostable Covalent Conformationally Interlocked Networks Enabling a Universal Radiometal-Labeling Platform

Xiao Xu1, Zhenwen Zhao2, Yangjie Wang3

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Summary
This summary is machine-generated.

New poly(imide dioxime) ligand-based microspheres (PID-Ms) offer a stable platform for radiolabeling in liver cancer treatment. These microspheres demonstrate ultra-high radiostability and anti-tumor efficacy for advanced liver cancer therapy.

Keywords:
covalent conformational interlocked networksradionuclidestheranosticsultra‐radiostability

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Area of Science:

  • Materials Science
  • Radiochemistry
  • Oncology

Background:

  • Transcatheter arterial embolization (TARE) is a key treatment for advanced liver cancer.
  • Traditional radioactive microspheres face material and technical limitations.
  • Novel microsphere design is needed to overcome current challenges in TARE.

Purpose of the Study:

  • To introduce novel conjugated poly(imide dioxime) ligand-based microspheres (PID-Ms) for advanced liver cancer treatment.
  • To evaluate the radiolabeling capabilities and radiostability of PID-Ms.
  • To demonstrate the therapeutic potential of PID-Ms in preclinical liver cancer models.

Main Methods:

  • Synthesis of poly(imide dioxime) ligand-based microspheres (PID-Ms).
  • Radiolabeling of PID-Ms with various radionuclides (e.g., 177Lu, 90Y, 68Ga).
  • Assessment of radiostability using EXAFS, DFT, and in vitro/in vivo experiments.
  • Evaluation of anti-tumor efficacy in rat and rabbit VX2 orthotopic liver tumor models.

Main Results:

  • PID-Ms were successfully synthesized with a stable radiometal coordinate covalent interlocked network.
  • Low-temperature radiolabeling (40°C) was achieved for diagnostic and therapeutic radionuclides.
  • 177Lu-PID-Ms demonstrated ultra-high radiostability and significant anti-tumor efficacy in vivo.
  • Adjustable shelf life and on-demand radiolabeling capabilities were confirmed.

Conclusions:

  • PID-Ms represent a significant advancement for transcatheter arterial embolization in liver cancer.
  • The ultra-high radiostability and efficacy of PID-Ms offer a promising alternative to traditional microspheres.
  • This technology has broad potential for PET/SPECT-mediated radiopharmaceutical therapy and other imaging applications.