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Polymers for delivering peptides and proteins

N L Burnham1

  • 1Comprehensive Cancer Center, Mayo Clinic, Rochester, MN.

American Journal of Hospital Pharmacy
|January 15, 1994
PubMed
Summary
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Polymer conjugation enhances therapeutic proteins, improving drug delivery and reducing immune responses. This technology, exemplified by PEG-adenosine deaminase, offers new treatments for genetic disorders and cancers.

Area of Science:

  • Biotechnology
  • Polymer Chemistry
  • Pharmacology

Background:

  • Therapeutic proteins face challenges like rapid clearance and immunogenicity.
  • Soluble-polymer technology aims to overcome these limitations by modifying protein surfaces.

Purpose of the Study:

  • To explore the use of polymers for improved peptide and protein drug delivery.
  • To evaluate the efficacy and safety of polymer-conjugated protein therapeutics.

Main Methods:

  • Conjugation of polymers, primarily polyethylene glycol (PEG), to therapeutic proteins.
  • Assessment of linkage stability, solubility, immunogenicity, half-life, and biological activity.
  • Review of existing FDA-approved and investigational polymer-drug conjugates.

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Main Results:

  • Polyethylene glycol (PEG)-adenosine deaminase (pegademase bovine) is FDA-approved for ADA deficiency.
  • PEG-asparaginase shows promise in leukemia with minimal allergic reactions.
  • PEGylation significantly increases the half-life of proteins like superoxide dismutase.

Conclusions:

  • Polymer conjugation yields protein drugs with intact activity and reduced immunogenicity.
  • Further research is needed to fully understand and optimize polymer-drug conjugate technology.
  • This approach holds significant potential for developing advanced protein-based therapeutics.