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Related Experiment Video

Updated: Jan 30, 2026

Imaging Mismatch Repair and Cellular Responses to DNA Damage in Bacillus subtilis
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Improved cellular response on functionalized polypyrrole interfaces.

Sanaz Naghavi Alhosseini1, Fathollah Moztarzadeh1, Akbar Karkhaneh1

  • 1Biomaterials Group, Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran.

Journal of Cellular Physiology
|January 31, 2019
PubMed
Summary

This study developed functionalized polypyrrole-coated scaffolds using glycine and gelatin to enhance neural regeneration. The scaffolds demonstrated excellent biocompatibility and promoted superior neural cell adhesion for nerve tissue engineering applications.

Keywords:
electroactive scaffoldgelatinpolypyrroletissue engineering

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Area of Science:

  • Biomaterials Science
  • Neuroscience
  • Tissue Engineering

Background:

  • Neuroregeneration requires strategies that provide chemical and physical cues for optimal neural growth.
  • Neural scaffolds are promising for nerve repair by supporting and replacing damaged neurons and axons.
  • Optimizing cellular response is critical for effective neural scaffold design.

Purpose of the Study:

  • To develop and evaluate functionalized polypyrrole-coated nanofibrous scaffolds for neural tissue engineering.
  • To investigate the impact of glycine and gelatin functionalization on scaffold properties and cellular response.
  • To assess the in vitro and in vivo biocompatibility and cell adhesion capabilities of the developed scaffolds.

Main Methods:

  • Fabrication of nanofibrous scaffolds using electrospinning of polyvinyl alcohol and chitosan.
  • Surface polymerization of pyrrole monomers onto scaffolds to create an electroactive polypyrrole interface.
  • Functionalization of the polypyrrole interface with glycine and gelatin.
  • Characterization of scaffold properties, including zeta potential.
  • Evaluation of in vitro and in vivo biocompatibility and cell attachment using DAPI staining.

Main Results:

  • The polymerized polypyrrole exhibited a positive zeta potential (57.5 ± 5.46 mV).
  • The glycine and gelatin-functionalized polypyrrole-coated scaffolds showed excellent in vitro and in vivo biocompatibility with no observed inflammatory cells.
  • Superior cell attachment was observed on the gelatin-functionalized polypyrrole-coated scaffolds.

Conclusions:

  • The developed electroactive, positively charged polypyrrole interface, functionalized with gelatin, offers a promising approach for neural tissue engineering.
  • The combination of topography and tuned physical/chemical cues effectively promotes neural cell adhesion.
  • These functionalized scaffolds represent an efficient strategy for stimulating nerve regeneration.