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Thermo-Gelling Dendronized Chitosans for Modulating Protein Activity.

Yi Yao1, Shijie Cao1, Qingcen Yang1

  • 1International Joint Laboratory of Biomimetic & Smart Polymers, School of Materials Science and Engineering, Shanghai University, Shanghai200444, China.

ACS Applied Bio Materials
|November 7, 2022
PubMed
Summary

New dendronized chitosan hydrogels offer controlled protein activity regulation. These thermoresponsive materials provide molecular confinement, protecting protein function for biomedical and therapeutic applications.

Keywords:
chitosandendronized polymerhydrogelprotein encapsulationthermoresponsiveness

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Protein activity regulation is crucial for biomedical and therapeutic applications.
  • Chitosan-based hydrogels offer biocompatibility and biodegradability.
  • Thermoresponsive materials enable triggered release and controlled environments.

Purpose of the Study:

  • To develop and characterize oligoethylene glycol (OEG)-based dendronized chitosan (DCS) hydrogels for protein activity regulation.
  • To investigate the thermoresponsive properties and structural effects on hydrogel performance.
  • To evaluate the protein confinement and activity protection capabilities of the DCS hydrogels.

Main Methods:

  • Synthesis of thermoresponsive DCS hydrogels via thermal dehydration.
  • Investigation of structural effects (hydrophobicity, grafting rates, solid content) on thermo-gelling and mechanical strength.
  • Characterization of hydrogel morphology and protein confinement using lamellar structures and hydrophobic microenvironments.
  • Assessment of protein activity protection and controlled release from the degradable hydrogels.

Main Results:

  • DCS hydrogels exhibit reversible sol-gel transitions at physiological temperatures.
  • Hydrogel properties are tunable by OEG hydrophobicity, grafting density, and polymer concentration.
  • Lamellar morphologies create hydrophobic microenvironments enhancing protein confinement.
  • DCS hydrogels effectively protect protein activity and allow controlled, non-damaging release.

Conclusions:

  • Dendronized chitosan hydrogels provide a promising platform for regulating protein bioactivity.
  • The molecular confinement and tunable thermoresponsiveness are key features for advanced biomedical applications.
  • These hydrogels offer a controllable and protective environment for proteins, preserving their therapeutic potential.