Related Experiment Video
Updated: Jun 12, 2025
11:34
Ultrathin Porated Elastic Hydrogels As a Biomimetic Basement Membrane for Dual Cell Culture
Published on: December 26, 2017
7.7K
Fib@PEGDA/GelMA hydrogel as a light-curing thin-layer matrix for RPE cell growth and function
Naiwen Zhang1, Cong Ma1, Fei Shao2,3
1Department of Ophthalmology, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, People's Republic of China.
Biomedical Materials (Bristol, England)
|May 23, 2025
Summary
This study developed an advanced Fib@PEGDA/GelMA hydrogel for retinal cell scaffolds. This bioink significantly enhances cell viability and function, offering a promising solution for treating blindness caused by retinal degenerative diseases.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Ophthalmology
Background:
- Retinal degenerative diseases cause progressive vision loss due to retinal pigment epithelium (RPE) and photoreceptor (PR) cell degeneration.
- Current therapies are insufficient to halt disease progression, highlighting the need for novel treatments.
- Cell replacement therapy shows promise but faces challenges in cell survival, integration, and transplantation.
Purpose of the Study:
- To engineer and optimize hydrogel scaffolds for retinal cell replacement therapy.
- To evaluate the biocompatibility and efficacy of novel hydrogel formulations for supporting RPE and PR cells.
- To develop a bioink for 3D printing functional retinal tissue constructs.
Main Methods:
- Screening of four hydrogels (GelMA, HAMA, AlgMA, PEGDA) and their combinations for RPE cell growth.
- Characterization of PEGDA/GelMA hydrogel mechanical properties and optimization of PEGDA600-20 hydrogel.
- Development and evaluation of the optimized Fib@PEGDA/GelMA hydrogel using cell viability assays (CCK-8), qRT-PCR, and functional assays.
- Assessment ofin vivobiocompatibility through subcutaneous implantation in RCS rats.
Main Results:
- PEGDA/GelMA hydrogel demonstrated superior support for RPE cell spreading and proliferation compared to other formulations.
- The optimized Fib@PEGDA/GelMA hydrogel significantly enhanced cell viability (17-19% increase) and mitigated epithelial-mesenchymal transition (EMT).
- Fib@PEGDA/GelMA hydrogel improved phagocytic activity in ARPE-19 cells, promoted functional expression in hiPSC-RPEs, and showed excellentin vivobiocompatibility.
Conclusions:
- Fib@PEGDA/GelMA hydrogel serves as a promising bioink for 3D-printed retinal cell scaffolds.
- This engineered hydrogel system enhances cell survival, function, and biocompatibility for retinal regenerative medicine.
- The findings pave the way for advanced cell replacement therapies to combat blindness from retinal degenerative diseases.
