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Biocompatible EDOT-Pyrrole Conjugated Conductive Polymer Coating for Augmenting Cell Attachment, Activity, and
Nicolas Muzzio1, Samantha Garcia2, Luis Flores2
1Division of Biological and Biomedical Systems, School of Science and Engineering, University of Missouri-Kansas City, Kansas City, Missouri 64110, United States.
ACS Applied Bio Materials
|January 24, 2025
Summary
A new biocompatible polypyrrole-poly(3,4-ethylenedioxythiophene) copolymer coating (PPy-PEDOT:PSS) enhances poly(ethylene glycol) diacrylate hydrogels. This coating supports neural and muscle cell attachment, differentiation, and activity, showing promise for regenerative medicine.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Poly(ethylene glycol) (PEG) hydrogels are widely used but require bioactive modifications for cell attachment.
- Developing functional scaffolds is crucial for cell research, tissue engineering, and regenerative medicine.
Purpose of the Study:
- To create a biocompatible coating for poly(ethylene glycol) diacrylate (PEGDA) hydrogels using a synthesized conductive copolymer.
- To evaluate the copolymer's ability to support neuronal and muscle cell attachment, activity, and differentiation.
Main Methods:
- Synthesized and characterized polypyrrole-poly(3,4-ethylenedioxythiophene) copolymer doped with poly(styrenesulfonate) (PPy-PEDOT:PSS).
- Coated PEGDA hydrogels with PPy-PEDOT:PSS and assessed protein adsorption, cell attachment, differentiation, viability, and neural activity.
- Utilized Raman spectroscopy, dynamic light scattering, electrochemical methods, atomic force microscopy, quartz crystal microbalance, and cell-based assays.
Main Results:
- The PPy-PEDOT:PSS coating was biocompatible and non-toxic to cells.
- Coated hydrogels supported attachment, differentiation, and activity of neuronal (ND7/23) and muscle (C2C12) cells.
- Primary neurons attached to the coating and responded to electrical stimulation, indicating functional integration.
Conclusions:
- The biocompatible PPy-PEDOT:PSS copolymer is an effective coating for PEGDA hydrogels.
- This approach presents significant potential as an interface for nervous and other electrically excitable tissues in regenerative medicine.
