Helical 3D Tissue Scaffold for Functional Evaluation
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Solution Overview
Problem
Current methods for evaluating the functional activity of engineered three-dimensional tissues and identifying compounds that modulate tissue function are limited by the use of conventional cell culture systems that do not allow for three-dimensional interactions between cells and their surrounding tissue, leading to inefficiencies in drug discovery and development.
Innovation Solution
A method involving a three-dimensional tissue scaffold with polymeric fibers encircling a lumen or cavity at specific angles, combined with cells growing on or in the scaffold, to form a functional tissue. This method measures rotational displacement or strain of the tissue over time to evaluate functional activity and identify compounds that modulate tissue function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional cell culture systems are used for evaluating engineered three-dimensional tissues, then the evaluation process is simple and quick, but the three-dimensional interactions between cells and surrounding tissue are lost, leading to inaccurate functional evaluation
Solution Approach 1:
The patent transitions from two-dimensional conventional cell culture systems to three-dimensional tissue scaffolds with complex internal architecture. The scaffolds feature interconnected pores, channels, and lumens that enable true three-dimensional cell-tissue interactions, allowing accurate evaluation of functional activity while maintaining structural complexity necessary for physiological relevance
Solution Approach 2:
The tissue scaffold is divided into multiple functional compartments including lumens, pores, and channels of varying sizes. This segmentation creates distinct micro-environments that support different cell types and functional activities, enabling comprehensive evaluation of tissue function while maintaining manageable structural complexity through modular design
2Reliability
If three-dimensional tissue scaffolds with complex structures are used, then three-dimensional cell interactions are restored for accurate functional evaluation, but the measurement and analysis become more difficult
Solution Approach 1:
The patent incorporates fluorescent markers, contrast agents, or radiopaque materials within the tissue scaffold that enable visualization and tracking of structural changes. These markers appear as distinct signals in imaging modalities such as fluorescence microscopy, CT scans, or MRI, facilitating accurate measurement of rotational displacement and strain while maintaining the three-dimensional structural complexity necessary for reliable tissue function representation
Solution Approach 2:
The patent introduces imaging agents, tracers, or sensor elements as intermediaries between the complex tissue structure and the measurement system. These intermediaries translate the mechanical deformations and rotational movements of the three-dimensional scaffold into detectable signals, simplifying the measurement process while preserving the reliability of the functional evaluation
3Productivity
If three-dimensional tissue models are used instead of animal models, then ethical concerns and costs are reduced, but the complexity of replicating in vivo tissue interactions increases
Solution Approach 1:
The tissue scaffold design incorporates multiple functional features within a single structure, including lumens for fluid flow, pores for diffusion, channels for nutrient transport, and varying tissue densities. This multi-functionality allows the scaffold to simultaneously support diverse cell types, replicate complex tissue interactions, and enable parallel drug screening assays, thereby increasing productivity while managing complexity through integrated design
Solution Approach 2:
The patent employs adjustable parameters such as pore size, fiber diameter, scaffold porosity, and tissue composition that can be modified to match specific in vivo conditions. By systematically varying these parameters, the model can replicate different tissue environments and disease states, enabling efficient drug discovery while managing complexity through standardized, tunable design elements
Data Source
AI summary
Methods of evaluating functional activity of an engineered three-dimensional tissue, methods of identifying a compound that modulates tissue function, and methods for identifying a compounds that is useful for treating or preventing a disease affecting tissue function are provided herein. Some methods include providing or obtaining a three-dimensional tissue scaffold defining a lumen or a cavity, the tissue scaffold comprising one or more polymeric fibers each having a micron-scale or nanometer-scale diameter, at least some of the one or more polymeric fibers encircling the lumen or cavity at a helical angle with respect to a longitudinal axis of the lumen or cavity, at an azimuthal orientation with respect to the longitudinal axis of the lumen or cavity, or at both.