Biodegradable Particle-Loaded Cells for Controlled Agent Release
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Solution Overview
Problem
Current methods for controlling cell fate and microenvironment in tissue regeneration and cell therapy often require genetic modification, engineered substrates, or systemic infusion with carriers, which can be invasive and lack precise control over agent release kinetics.
Innovation Solution
The use of biodegradable particles internalized within cells to release phenotype-altering agents into the extracellular environment, allowing for controlled delivery of therapeutic agents without genetic manipulation or artificial substrates, enabling autologous or allogeneic cell-based therapies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If genetic manipulation is used to program cell fate, then expression of specific cell surface receptors and therapeutic peptides can be driven, but the modifications exhibit long-term impact on cells and are limited to agents that can be manufactured by cells
Solution Approach 1:
The system segments the cell population into two functional components: phenotype-modulating cells (PMCs) that contain and release agents, and target cells that respond to these agents. This segmentation allows the PMCs to be genetically modified or loaded with particles while the target cells remain unmodified, resolving the contradiction by limiting long-term genetic impact to only the PMCs rather than all cells in the system.
Solution Approach 2:
The patent introduces soluble agents (growth factors, cytokines, or particles) as intermediaries between the PMCs and target cells. The PMCs produce or contain these intermediary agents that mediate the phenotypic changes in target cells, allowing indirect control that avoids direct genetic manipulation of target cells and enables use of agents beyond those cells can manufacture themselves.
2Adaptability or versatility
If drugs or growth factors are added to culture media, then cells can receive signaling cues, but all cells typically receive essentially the same signal and application is limited to pre-conditioning regimens
Solution Approach 1:
The patent implements local quality by enabling individual PMCs to produce or release agents at specific locations within the culture system. Each PMC acts as a localized source of signaling agents, creating spatially heterogeneous microenvironments rather than uniform exposure. This allows different regions or neighborhoods of cells to experience different signaling cues, enabling precise spatial control over cell fate decisions.
3Adaptability or versatility
If scaffolds or engineered substrates are used to create distinct microenvironments, then multiple locations can modulate cell behavior, but these strategies typically require cells to be on or in close proximity to the substrate and involve complex manufacturing methodology
Solution Approach 1:
The patent employs self-service by enabling PMCs to autonomously produce, secrete, or release phenotypic modulating agents without requiring external substrate support or complex engineered microenvironments. The PMCs themselves serve as the source and delivery mechanism for creating localized microenvironments, eliminating the need for scaffolds or patterned substrates. This self-sufficient approach reduces manufacturing complexity while maintaining the ability to create diverse signaling niches.
4Ease of operation
If systemic cell infusion is performed without carrier or substrate, then cells can be infused in vivo, but there is an inability to control release kinetics of agents
Solution Approach 1:
The patent implements dynamics by incorporating controllable release mechanisms that allow the PMCs to dynamically regulate agent secretion rates in response to environmental cues or temporal programs. The PMCs can be engineered with inducible expression systems, responsive promoters, or particle release mechanisms that adjust secretion kinetics based on local conditions such as pH, oxygen tension, or specific molecular triggers, enabling precise temporal control during in vivo infusion without requiring external carriers.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise control of cell fate and microenvironment modulation, enabling targeted delivery of therapeutic agents to specific tissues with delayed or controlled release, reducing toxicity and enhancing therapeutic efficacy while maintaining cell viability and functionality.
Implementation Method 1
biodegradable particles that include active agents can be internalized within cells, leading to release of the agents from the particles
Implementation Method 2
release of the agents from the particles and export of the agents from the cells
Data Source
Figure 1A~1B
Figure 2A~2F
Figure 3A~3B
AI summary
A composition includes an isolated cell; at least one particle within said cell; and at least one active agent associated with the particle, wherein the active agent is capable of being released from the cell. A method includes administration of such a cell to a subject.