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Published on: September 12, 2014
hDPSC-laden GelMA microspheres fabricated using electrostatic microdroplet method for endodontic regeneration
Ting Yang1, Qingyuan Zhang1, Li Xie1
1Engineering Research Center of Oral Translational Medicine, Ministry of Education, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China; National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China; Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China.
Gelatin methacryloyl (GelMA) hydrogel microspheres effectively deliver human dental pulp stem cells for endodontic regeneration. These biocompatible microspheres support cell function and promote vascularized tissue formation in vivo.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Stem Cell Biology
Background:
- Microsphere systems are promising for stem cell delivery in regenerative medicine.
- Developing optimal biomaterials for endodontic regeneration remains a challenge.
- Gelatin methacryloyl (GelMA) offers bioactivity and biodegradability.
Purpose of the Study:
- To fabricate GelMA hydrogel microspheres for endodontic regeneration.
- To evaluate GelMA microspheres as cell delivery vehicles for human dental pulp stem cells (hDPSCs).
- To assess the in vivo performance of GelMA microspheres in a nude mouse model.
Main Methods:
- Fabrication of GelMA hydrogel microspheres using the electrostatic microdroplet method.
- Encapsulation of hDPSCs within GelMA microspheres (~200 μm size, ~582.8 Pa Young's modulus).
- Assessment of cell viability, proliferation, extracellular matrix secretion, and cryopreservation stability.
- Subcutaneous implantation in nude mice to evaluate tissue regeneration and degradation.
Main Results:
- GelMA microspheres mimicked the mechanical properties of natural dental pulp.
- Encapsulated hDPSCs exhibited excellent adhesion, proliferation, and matrix secretion.
- The microsphere system demonstrated cryopreservation viability.
- Implantation led to the generation of vascularized pulp-like tissues with appropriate degradation.
Conclusions:
- GelMA microspheres are a viable and effective cell delivery system for endodontic regeneration.
- The biocompatibility and functionality of GelMA microspheres support tissue repair.
- GelMA microspheres show significant potential for clinical applications in endodontic regenerative medicine.
