PLA-PEG-PLA and its electroactive tetraaniline copolymer as multi-interactive injectable hydrogels for tissue
Haitao Cui1, Jun Shao, Yu Wang
1Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, PR China.
Biomacromolecules
|April 25, 2013
Summary
Injectable electroactive hydrogels (IEHs) were developed for tissue engineering. These biocompatible hydrogels promote cell proliferation when stimulated by electrical pulses, showing potential for in vivo applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Polymer Chemistry
Background:
- Injectable hydrogels are crucial 3D scaffolds for tissue engineering and cell encapsulation.
- Introducing electrical properties enhances biomaterial functionality for biomedical applications.
Purpose of the Study:
- To prepare injectable electroactive hydrogels (IEHs) with enhanced properties for tissue engineering.
- To investigate the electroactive, gelation, and biocompatibility characteristics of the novel hydrogels.
Main Methods:
- Synthesized IEHs by coupling carboxyl-capped tetraaniline (CTA) with enantiomeric polylactide-poly(ethylene glycol)-polylactide (PLA-PEG-PLA).
- Characterized electroactivity using UV-vis spectroscopy and cyclic voltammetry.
- Analyzed gelation mechanisms via FT-IR, UV-vis, WAXD, and rheometry.
- Assessed in vitro cytocompatibility and in vivo biocompatibility through cell viability assays and H&E staining.
Main Results:
- The synthesized IEHs exhibited good electroactive properties and stable gel formation through stereocomplexation, hydrogen bonding, and π-π stacking.
- Encapsulated cells showed high viability, and in vivo studies indicated acceptable biocompatibility.
- Pulsed electrical stimulation accelerated the proliferation of encapsulated fibroblasts, cardiomyocytes, and osteoblasts.
Conclusions:
- The developed IEHs demonstrate excellent cytocompatibility and in vivo biocompatibility.
- Electrical stimulation significantly enhances the proliferative capacity of encapsulated cells.
- These IEHs hold significant potential as advanced in vivo materials for tissue engineering scaffolds.
