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Polymeric Nanogels with Tailorable Degradation Behavior.

Yinan Chen1, Mies J van Steenbergen1, Dandan Li1

  • 1Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584, CG, Utrecht, The Netherlands.

Macromolecular Bioscience
|April 14, 2016
PubMed
Summary

This study introduces tailorable polymeric nanogels for drug delivery. These novel nanogels offer controlled degradation kinetics and demonstrate excellent cytocompatibility, making them promising for advanced therapeutic applications.

Keywords:
biodegradablecrosslink densitycytocompatibilitydrug delivery systemspolymeric nanogels

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Biomedical Engineering

Background:

  • Polymeric nanogels are crucial for drug delivery systems.
  • Tailoring nanogel degradation is essential for controlled release.
  • Existing systems may have limitations in degradation control and biocompatibility.

Purpose of the Study:

  • To design and synthesize polymeric nanogels with tunable degradation rates.
  • To investigate the degradation kinetics and drug release profiles of the synthesized nanogels.
  • To evaluate the cytocompatibility of the nanogels for potential biomedical applications.

Main Methods:

  • Synthesis of hydroxyethyl methacrylate-oligoglycolates-derivatized poly(hydroxypropyl methacrylamide) (pHPMAm-Gly-HEMA) and hydroxyethyl methacrylamide-oligoglycolates-derivatized poly(hydroxyethyl methacrylamide) (pHEMAm-Gly-HEMAm).
  • Characterization of synthesized polymers and nanogels, including hydrolysis rates of ester groups.
  • Evaluation of nanogel degradation kinetics by varying crosslink densities.
  • Assessment of macromolecular model drug release.
  • Cytocompatibility testing compared to PLGA nanoparticles.

Main Results:

  • pHEMAm-Gly-HEMAm exhibited faster hydrolysis rates for both carbonate and glycolate esters compared to pHPMAm-Gly-HEMA.
  • pHEMAm-Gly-HEMAm nanogels demonstrated tailorable degradation kinetics ranging from 24 hours to over 4 days.
  • Drug release was effectively controlled by the nanogel degradation rate.
  • The nanogels showed comparable cytocompatibility to PLGA nanoparticles.

Conclusions:

  • Novel polymeric nanogels with adjustable degradation properties were successfully designed.
  • These nanogels offer precise control over drug release kinetics.
  • The demonstrated cytocompatibility positions these nanogels as promising candidates for drug delivery applications.