Bioengineered Trabecular Meshwork Scaffold for Glaucoma Screening
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Solution Overview
Problem
Current methods for studying and treating glaucoma lack effective, efficient in vitro models for screening new therapeutics, as conventional human trabecular meshwork (HTM) cell cultures are unsuitable for high-throughput screening and fail to accurately mimic the physiological outflow pathways, leading to limited pharmacological advances and unpredictable surgical outcomes.
Innovation Solution
A bioengineered 3-D micro- and nanostructured scaffold is developed to mimic the trabecular meshwork, optimized with specific pore sizes and geometries to support HTM cell growth, allowing for the creation of a high-throughput screening system and therapeutic device that replicates the physiological function of the HTM, enabling controlled perfusion and drug testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional human trabecular meshwork cell cultures are used, then the model is simple to maintain, but it fails to accurately mimic the physiological outflow pathways and is unsuitable for high-throughput screening
Solution Approach 1:
The patent employs a porous scaffold structure that replicates the trabecular meshwork's natural porous architecture. This porous material allows aqueous humor to flow through while supporting HTM cell growth, accurately mimicking the physiological outflow pathway. The scaffold's pore size and interconnectivity are optimized to match in vivo conditions, enabling both physiological accuracy and compatibility with high-throughput screening formats.
Solution Approach 2:
The invention transitions from conventional 2D cell culture to a 3D scaffold-based model that recreates the three-dimensional architecture of the trabecular meshwork. This dimensional transformation allows cells to grow and function in a more physiologically relevant environment while maintaining compatibility with high-throughput screening through standardized 3D culture formats.
2Reliability
If a 3-D micro- and nanostructured scaffold is developed to mimic the trabecular meshwork, then the physiological accuracy is improved, but the device complexity increases
Solution Approach 1:
The scaffold is segmented into distinct functional zones including a trabecular meshwork region and a Schlemm's canal region, each with optimized pore sizes and structural characteristics. This segmentation allows different areas to perform specialized functions while maintaining overall physiological accuracy, and the modular design facilitates manufacturing and integration into screening systems.
Solution Approach 2:
Different regions of the scaffold exhibit locally optimized properties: the trabecular meshwork region has smaller pores to filter debris, while Schlemm's canal has larger pores to facilitate bulk flow. The scaffold also incorporates varying beam thicknesses and pore geometries in different zones to match the heterogeneous structure of native trabecular meshwork, enhancing physiological realism without requiring uniform complexity throughout.
3Reliability
If the scaffold is optimized with specific pore sizes and geometries to support HTM cell growth, then the physiological function is better replicated, but the manufacturing precision requirements increase
Solution Approach 1:
The scaffold design incorporates specific parameter ranges rather than exact values: pore sizes of 5-20 micrometers in the trabecular region and 20-50 micrometers in Schlemm's canal region, with beam thicknesses of 1-5 micrometers. These parameter ranges provide manufacturing tolerance while maintaining physiological functionality. The use of standardized parameters facilitates replication across different manufacturing batches.
Solution Approach 2:
The scaffold structure is pre-designed and fabricated with optimized pore sizes and geometries before cell seeding. This preliminary structuring ensures that the physiological function is built into the scaffold architecture itself, reducing the need for post-fabrication adjustments and simplifying the overall manufacturing process while maintaining precision requirements.
Data Source
AI summary
The present invention relates to methods of manufacture and utility of an artificial trabecular meshwork [TM] that utilizes micro- and nanofabricated materials bioengineered to mimic the structure and function of native outflow system of the eye.