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Analysis of Three-Dimensional Cell Migration in Dopamine-Modified Poly(aspartic acid)-Based Hydrogels
David Juriga1, Eszter Eva Kalman2,3, Krisztina Toth1,3
1Department of Biophysics and Radiation Biology, Semmelweis University, H-1089 Budapest, Hungary.
Gels (Basel, Switzerland)
|February 24, 2022
Summary
Poly(aspartamide)-based hydrogels modified with dopamine enhance cell infiltration for tissue regeneration. Dopamine-containing scaffolds facilitate vertical cell penetration in 3D matrices, aiding therapeutic applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cell Biology
Background:
- Cell-based therapies require suitable scaffolds for tissue regeneration.
- Polymer hydrogels mimic the extracellular matrix, making them promising scaffold materials.
- Amino acid-based hydrogels are limited by complex and costly preparation.
Purpose of the Study:
- To investigate dopamine-containing poly(aspartamide) (PASP)-based hydrogels as scaffolds for tissue regeneration.
- To evaluate the effect of dopamine on cell behavior within PASP hydrogels.
- To develop and introduce a novel image analysis process for quantifying cell distribution.
Main Methods:
- Synthesis and chemical characterization of PASP-based hydrogels using 1H-NMR and FTIR spectroscopy.
- Assessment of hydrogel microstructure and pore size using Scanning Electron Microscopy (SEM).
- In vitro evaluation of cell viability (WST-1 assay) and 3D cell distribution (two-photon microscopy) using Periodontal Ligament Cells (PDLCs) and SH-SY5Y neuroblastoma cells.
Main Results:
- Dopamine-containing PASP hydrogels exhibited suitable pore sizes for cell migration.
- SEM confirmed appropriate hydrogel pore size for cell migration.
- Dopamine-modified PASP gels facilitated significant vertical cell penetration (~150 μm, ~4 cell layers) into the hydrogel matrix.
Conclusions:
- PASP-based hydrogels offer a cost-effective and chemically modifiable alternative to traditional amino acid-based hydrogels.
- Dopamine incorporation into PASP scaffolds enhances cell infiltration and distribution within the 3D matrix.
- The developed image analysis method provides quantitative insights into cell penetration, crucial for optimizing scaffold design in regenerative medicine.
