Asymmetrical Artificial Antigen Presenting Cells for T Cell Activation
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Solution Overview
Problem
Existing artificial antigen presenting cell (aAPC) systems have not effectively captured the aspects of spatial organization and geometry of interactions between T cells and antigen presenting cells, as they primarily use spherical particles that minimize surface area for a given volume, failing to mimic the complex morphology changes of dendritic cells during T cell activation.
Innovation Solution
Development of asymmetrical-shaped three-dimensional microparticles or nanoparticles that mimic the shape of cells or microorganisms, such as spirals, cubes, or ellipsoids, with specific dimensions and surface curvatures, coupled with molecules interacting with T cell receptors to enhance T cell activation and modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spherical particles are used for aAPC, then manufacturing simplicity is improved, but surface area for T cell interaction is reduced
Solution Approach 1:
The patent applies asymmetry by transforming spherical particles into rod-shaped particles with aspect ratios of 2:1 or higher. This shape transformation increases the surface area available for T cell receptor interactions while maintaining manufacturing feasibility through controlled assembly of anisotropic units during particle formation
2Device complexity
If spherical particles are used for aAPC, then particle simplicity is improved, but ability to mimic natural APC morphology is reduced
Solution Approach 1:
The patent uses asymmetry to create rod-shaped particles that mimic the elongated morphology of natural dendritic cells and other antigen-presenting cells. This shape resemblance enhances the biological functionality by better replicating the geometric interactions that occur between natural APCs and T cells
Solution Approach 2:
The patent employs curvature principles by creating particles with specific aspect ratios and surface characteristics that resemble natural cell shapes. The rod-shaped geometry with controlled curvature radii mimics the spatial organization of membrane apposition zones formed during natural immune synapse formation
3Reliability
If asymmetrical-shaped particles are used for aAPC, then T cell activation efficacy is improved, but manufacturing complexity is increased
Solution Approach 1:
The patent applies segmentation by constructing rod-shaped particles from assembled anisotropic units or building blocks. This modular assembly approach enables controlled formation of asymmetrical shapes while maintaining manufacturing scalability and process control
Solution Approach 2:
The patent uses parameter changes by controlling the aspect ratio of rod-shaped particles and optimizing surface functionalization density. These parameter optimizations enhance T cell activation efficacy while managing manufacturing complexity through systematic variable control
Data Source
AI summary
Compositions and methods comprising asymmetrical artificial antigen presenting cells (aAPCs) are disclosed. The non-spherical aAPCs more closely mimic endogenous cell-cell interactions and can be used for antigen-specific immunotherapy.