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Absorbable sandwich-like membrane for retinal-sheet transplantation
Ging-Ho Hsiue1, Jui-Yang Lai, Po-Kang Lin
1Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30043, Republic of China. ghhsiue@che.nthu.edu.tw
Journal of Biomedical Materials Research
|May 10, 2002
Summary
Biodegradable gelatin membranes offer a novel solution for retinal sheet transplantation. Gamma-ray irradiation provides a sterile, biocompatible membrane ideal for preserving retinal grafts and treating retinal disorders.
Area of Science:
- Ophthalmology
- Biomaterials Science
- Regenerative Medicine
Background:
- Neural retinal transplantation shows promise for retinal disorders.
- The delicate nature of retinal tissue complicates transplantation procedures.
Purpose of the Study:
- To develop and optimize a technique for lamellar tissue transplantation using biodegradable gelatin membranes.
- To determine the optimal sterilization method for gelatin membranes to ensure biocompatibility and mechanical integrity for retinal grafts.
Main Methods:
- Biodegradable gelatin membranes were fabricated into a sandwich to encapsulate retinal grafts.
- In vitro and in vivo characterization of membranes sterilized by hydrogen peroxide gas plasma (HPGP), ethylene oxide (EO), and gamma-ray irradiation (gamma).
- Evaluation of RPE cytotoxicity, mechanical properties, degradability, and biocompatibility in a rabbit model.
Main Results:
- Gamma-ray irradiation (16.6 kGy) resulted in membranes with no RPE cytotoxicity and enhanced mechanical properties.
- HPGP and EO sterilization methods induced RPE cytotoxicity.
- In vivo studies demonstrated excellent biocompatibility and no inflammation with implanted gelatin membranes.
- Transplanted retinal sheets survived and formed laminar structures.
Conclusions:
- Gelatin membranes sterilized by gamma-ray irradiation are a safe and effective scaffold for retinal sheet transplantation.
- This technique holds significant potential for routine clinical application in treating retinal degenerative diseases.