Decellularized Descemet's Membrane for Limbal Stem Cell Expansion
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Solution Overview
Problem
Current treatments for limbal stem cell deficiency, such as keratolimbal allografts, simple limbal epithelial transplants, and cultured limbal transplants, face challenges including high rejection rates, limited donor tissue availability, suboptimal results, and difficulties in maintaining long-term viability and stem cell phenotype of transplanted cells due to the use of amniotic membrane as a substrate.
Innovation Solution
Utilizing decellularized and isolated Descemet's membrane as a substrate for culturing and transplanting limbal stem cells, which mimics the limbal niche microenvironment, promoting cell proliferation and maintaining stem cell phenotype, and is transparent and resistant to collagenase digestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If amniotic membrane is used as a substrate for culturing limbal stem cells, then cell proliferation is supported, but immune rejection risk increases and long-term viability is compromised
Solution Approach 1:
The patent extracts the essential function of amniotic membrane (supporting cell proliferation) by using decellularized Descemet's membrane as an alternative substrate. This extraction approach removes the immunogenic components while preserving the structural and biochemical properties needed for limbal stem cell expansion, thereby maintaining productivity while reducing immune rejection risk.
Solution Approach 2:
The patent creates a copy of the limbal niche microenvironment using decellularized Descemet's membrane that mimics the natural extracellular matrix. This copied structure provides the necessary biochemical cues for cell proliferation without the immunogenic properties of amniotic membrane, achieving both high productivity and reliability.
2Productivity
If amniotic membrane is used as a substrate, then limbal stem cells can be cultured, but maintaining long-term stem cell phenotype becomes difficult
Solution Approach 1:
The patent changes the substrate parameters by using decellularized Descemet's membrane with specific biochemical and structural properties that better mimic the native limbal niche. This parameter change in the culture substrate maintains stem cell phenotype stability while supporting continuous cell expansion, resolving the contradiction between productivity and compositional stability.
3Reliability
If donor tissue is used for limbal stem cell transplantation, then treatment is provided, but donor tissue availability is limited
Solution Approach 1:
The patent enables self-service by using the patient's own corneal tissue (Descemet's membrane) as the culture substrate for expanding their own limbal stem cells. This eliminates the need for external donor tissue while maintaining treatment efficacy, as the decellularized membrane provides all necessary support functions for stem cell proliferation and phenotype maintenance.
Data Source
AI summary
This disclosure describes methods of preparing a decellularized Descemet's membrane and an isolated Descemet's membrane, methods of using an isolated Descemet's membrane, and tissues prepared using an isolated Descemet's membrane. This disclosure further describes a composition that includes an isolated Descemet's membrane. In some embodiments, the tissues and methods described herein may be used to treat a limbal stem cell deficiency or as an ocular surface bandage.