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Biodegradable Polyphosphazene Based Peptide-Polymer Hybrids.

Anne Linhardt1, Michael König2, Wolfgang Schöfberger3

  • 1Institute of Polymer Chemistry, Johannes Kepler University Linz (JKU), Altenberger Straße 69, A-4040 Linz, Austria. anne.linhardt@jku.at.

Polymers
|April 14, 2019
PubMed
Summary
This summary is machine-generated.

Novel biodegradable polymers based on polyphosphazene backbones and specific peptide sequences demonstrate tunable enzymatic degradation. These water-soluble materials show promise for advanced polymer therapeutics and drug delivery applications.

Keywords:
Peptide-polymer hybridbiodegradable polymerenzymatic degradationhydrolytic degradationimiquimod (R837)peptide-polymer conjugatepolymer therapeuticspolyphosphazene

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Area of Science:

  • Polymer Chemistry
  • Biomaterials Science
  • Drug Delivery

Background:

  • Development of novel biodegradable polymers is crucial for advanced therapeutic applications.
  • Polyphosphazenes offer a versatile platform for creating functional hybrid materials.
  • Enzymatic degradation is a desirable property for controlled drug release systems.

Purpose of the Study:

  • To synthesize and characterize novel peptide-based hybrid polymers with tunable enzymatic degradation.
  • To investigate the water solubility, biodegradability, and degradation pathways of these new polymers.
  • To explore the potential of these polymers as carriers for drug delivery, specifically conjugating imiquimod.

Main Methods:

  • Macromolecular substitution of polyphosphazene backbone with Gly-Phe-Leu-Gly tetrapeptide.
  • Co-substitution with hydrophilic polyalkylene oxide (Jeffamine M-1000).
  • Degradation studies using 31P NMR spectroscopy, dynamic light scattering, and field flow fractionation.
  • Conjugation of imiquimod and investigation of self-assembly and drug release behavior.

Main Results:

  • Successfully synthesized water-soluble and biodegradable peptide-based hybrid polymers.
  • Demonstrated degradation via combined enzymatic and hydrolytic pathways, triggered by the peptide sequence.
  • The imiquimod conjugate exhibited self-assembly properties and enzymatically triggered drug release.

Conclusions:

  • The novel polyphosphazene-based hybrid polymers are effectively degraded enzymatically and hydrolytically.
  • These polymers represent a promising new class of materials for polymer therapeutics.
  • The ability to conjugate drugs and achieve triggered release highlights their potential in targeted drug delivery systems.