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Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications
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PEG-based thermosensitive and biodegradable hydrogels.

Jiayue Shi1, Lin Yu2, Jiandong Ding2

  • 1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Shanghai Stomatological Hospital, Fudan University, Shanghai 200438, China.

Acta Biomaterialia
|April 15, 2021
PubMed
Summary
This summary is machine-generated.

Injectable thermosensitive hydrogels, particularly poly(ethylene glycol) (PEG)-based ones, offer easy encapsulation and in situ formation for drug delivery and tissue engineering. These biodegradable materials are advancing biomedical applications.

Keywords:
PEGPoly(organophosphazene)PolyesterPolypeptideThermosensitive hydrogel

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Thermosensitive hydrogels transition from liquid to gel at body temperature, enabling minimally invasive injectable systems.
  • Poly(ethylene glycol) (PEG) is a key hydrophilic component in thermoresponsive hydrogels due to its biocompatibility.
  • Incorporating hydrophobic segments like polyesters and polypeptides into PEG systems creates biodegradable thermosensitive hydrogels.

Purpose of the Study:

  • To review recent advancements in poly(ethylene glycol) (PEG)-based biodegradable thermosensitive hydrogels.
  • To discuss material design, property regulation, thermogelation, and degradation mechanisms.
  • To summarize biomedical applications and provide future perspectives for these hydrogels.

Main Methods:

  • Review of literature on PEG-based thermosensitive hydrogels, focusing on PEG-polyester, PEG-polypeptide, and poly(organophosphazene) copolymers.
  • Analysis of material design strategies and performance tuning.
  • Discussion of thermogelation and degradation mechanisms in relation to biomedical applications.

Main Results:

  • PEG-based biodegradable thermosensitive hydrogels exhibit tunable properties for various biomedical uses.
  • These hydrogels facilitate easy encapsulation of therapeutics or cells and form in situ upon injection.
  • Recent progress highlights their potential as drug-releasing reservoirs and cell-scaffolds.

Conclusions:

  • PEG-based thermosensitive hydrogels are versatile biomaterials for minimally invasive applications.
  • Understanding their design, mechanisms, and applications is crucial for developing new thermogelling systems.
  • These materials represent a significant research hotspot with broad future potential in biomedicine.