LGR Stem Cell Micro-Aggregates for Functional Wound Regeneration
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Solution Overview
Problem
Current wound care methods and tissue engineering technologies fail to provide a multi-compartment tissue construct capable of regenerating functional tissues due to the lack of inter-dependent cellular progenitor and stem cell populations, extracellular matrix scaffolding, and proper cell-to-cell and cell-to-matrix interactions, leading to scarring and dysfunction in complex wounds.
Innovation Solution
Development of minimally polarized micro-aggregate multi-cellular compositions containing LGR expressing cells, supported by scaffolding, collagen, matrix, or fiber, supplemented with growth factors and antimicrobial peptides, to enhance wound healing and tissue regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current wound care methods and tissue engineering technologies are used, then wound treatment is provided, but multi-compartment tissue regeneration and functional tissue restoration fail due to lack of inter-dependent cellular progenitor and stem cell populations, extracellular matrix scaffolding, and proper cell-to-cell and cell-to-matrix interactions
Solution Approach 1:
The patent segments the tissue construct into distinct micro-aggregate compartments, each containing specific cell types (epithelial stem cells, mesenchymal stem cells, endothelial cells) embedded in appropriate extracellular matrix. These segmented micro-aggregates maintain cellular inter-dependencies while providing organized structural units that can be assembled into functional multi-compartment tissue constructs, resolving the contradiction between regeneration capability and construct complexity.
Solution Approach 2:
The patent employs a nested structure where micro-aggregate functional units are embedded within a larger extracellular matrix scaffold. Each micro-aggregate contains nested cellular compartments with specific cell populations organized in hierarchical arrangements, allowing complex multi-cellular interactions to be contained within manageable structural units that integrate into the overall tissue construct.
2Reliability
If severe full-thickness damage to the skin occurs, then existing epithelial stem cell populations are destroyed, but regenerative potential is lost without the epithelial stem cell focal niche
Solution Approach 1:
The patent applies epithelial stem cells and other progenitor cells to the wound bed before complete tissue regeneration occurs, establishing the regenerative niche in advance. This preliminary cellular colonization creates the necessary stem cell focal niche that enables subsequent tissue regeneration, preventing the loss of regenerative potential that would otherwise occur with severe full-thickness skin damage.
Solution Approach 2:
The patent uses extracellular matrix scaffolding as an intermediary substrate that supports and organizes stem cell populations. The ECM acts as a mediator between the applied stem cells and the damaged tissue bed, providing the structural framework and biochemical signals necessary for stem cell survival, proliferation, and differentiation, thereby maintaining regenerative potential even when native stem cell populations are destroyed.
3Reliability
If remaining tissues are left without epithelial stem cell focal niche, then granulatory and fibrotic efforts occur, but functional epithelium, hair follicle, sweat gland, or other specialized structures fail to form
Solution Approach 1:
The patent employs growth factors and signaling molecules that create feedback loops to regulate tissue regeneration. These signaling molecules respond to the presence of stem cells and extracellular matrix, modulating cellular behavior to promote functional tissue formation while inhibiting excessive fibrosis and scarring. The feedback mechanism ensures that granulatory and fibrotic processes are balanced with epithelialization and specialized structure development.
Data Source
AI summary
Provided herein are constructs of micro-aggregate multicellular, minimally polarized grafts containing Leucine-rich repeat-containing G-protein coupled Receptor (LGR) expressing cells for wound therapy applications, tissue engineering, cell therapy applications, regenerative medicine applications, medical/therapeutic applications, tissue healing applications, immune therapy applications, and tissue transplant therapy applications which preferably are associated with a delivery vector/substrate/support/scaffold for direct application.