Polyoxazoline thermoresponsive micelles as radionuclide delivery systemsa

  • Hruby M
  • Filippov S
  • Panek J
 et al. 
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Abstract

Thermoresponsive polymer micelles are promising drug and radionuclide carriers with a strong passive targeting effect into solid tumors. We have synthesized ABA triblock copolymers poly[2-methyl-2-oxazoline-block-(2-isopropyl-2-oxazoline-co-2-butyl-2-oxazoline)-block-2-methyl-2-oxazoline]. These polymers are molecularly dissolved in aqueous millieu below the cloud point temperature (CPT) of the thermoresponsive central block and above CPT form polymer micelles at CMC 5-10 × 10(-5) g · mL(-1) with diameter ≈200 nm. The phenolic moiety introduced into the copolymer allowed radionuclide labeling with iodine-125 ongoing in good yield with sufficient in vitro stability under model conditions.

Author-supplied keywords

  • Drug delivery systems
  • Micelles
  • Radiation
  • Synthesis
  • Thermal properties

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