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Related Experiment Video

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Author Spotlight: Improving the Production of Self-Assembling Fibers and Peptide Hydrogels for Superior Biocompatibility
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Peptide-assembled hydrogels for pH-controllable drug release.

Wenlong Xu1, Yue Hong2, Aixin Song2

  • 1School of Chemistry and Materials Science, Ludong University, Yantai, 264025, China.

Colloids and Surfaces. B, Biointerfaces
|October 27, 2019
PubMed
Summary

This study shows FFACD peptide hydrogels (G1, G3) are biocompatible drug carriers. G1 effectively loaded both hydrophilic and hydrophobic drugs, while G3 showed pH-dependent release for targeted cancer therapy.

Keywords:
Drug deliveryDrug releaseHydrogelPeptidepH-sensitivity

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Drug Delivery Systems

Background:

  • Peptide-based hydrogels offer promising platforms for biomedical applications.
  • Developing biocompatible and efficient drug delivery systems remains a critical challenge.

Purpose of the Study:

  • To investigate the potential of FFACD peptide hydrogels as drug carriers.
  • To evaluate the biocompatibility, drug loading capacity, and release profiles of these hydrogels.

Main Methods:

  • FFACD peptide was used to form hydrogels (G1, G2, G3) under different conditions.
  • Methyl thiazolyl tetrazolium (MTT) assays assessed cytotoxicity against HEK293 cells.
  • Drug loading capacity (DLC) was determined for DOX and PTX in G1 and G3.
  • In vitro drug release studies were conducted at different pH values.

Main Results:

  • G1 and G3 hydrogels exhibited excellent biocompatibility, whereas G2 showed cytotoxicity.
  • G1 demonstrated high DLC for both hydrophilic DOX and hydrophobic PTX.
  • G3 formed a DOX precipitate with 93% DLC due to electrostatic interactions.
  • G1/DOX showed no inhibition of DOX efficacy against K562 leukemia cells.
  • G3/DOX precipitates released 76% DOX at pH 6.0 and 13% at pH 7.4.

Conclusions:

  • FFACD peptide hydrogels (G1, G3) are viable, biocompatible drug delivery systems.
  • G1 is suitable for broad-spectrum drug delivery, while G3 offers pH-responsive, targeted release capabilities.
  • These hydrogels hold potential for advanced cancer therapeutics.