Multicellular Lay-Up Process for Tissue Engineering
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Solution Overview
Problem
Current tissue engineering methods face challenges in maintaining the viability of cells under extreme conditions and efficiently laying down multiple cell types in complex organs, as well as retaining capsules in the correct location for effective tissue regeneration.
Innovation Solution
A multicellular lay-up process involving the formation of a core material with mammalian cells, hydrogel, and bioactivating agents, encapsulated in a water-soluble polymer and fibrous component, followed by electrostatic spraying and deposition on a substrate, with controlled exposure to bioactivating agents to promote differentiation and growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cells are cultured in large numbers for tissue engineering, then sufficient tissue mass is produced, but cell viability is lost under extreme conditions
Solution Approach 1:
The patent applies preliminary action by forming a protective capsule shell around cells before they are exposed to extreme conditions. The capsule material is prepared and encapsulated with the cell-containing core material in advance, creating a protective structure that maintains cell viability during storage and transport. This allows cells to be cultured and prepared beforehand without losing viability when subjected to extreme temperatures or other harsh conditions.
2Adaptability or versatility
If multiple cell types are combined for complex organ regeneration, then tissue complexity is improved, but capsule retention at target location deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the complex tissue into multiple separate capsules, each containing a specific cell type. These individual capsules are then deposited in a layered or structured arrangement on the substrate. The segmented capsules maintain their individual integrity and retention properties while collectively forming a complex multi-cellular tissue structure, solving the problem of retaining multiple cell types at the target location.
Solution Approach 2:
The patent applies dimensionality change by arranging capsules in layered structures or three-dimensional configurations on the substrate. Instead of mixing multiple cell types in a single homogeneous capsule, the invention deposits different cell-type capsules in specific spatial arrangements and layers, creating complex tissue structures through spatial organization. This dimensional approach enables both tissue complexity and capsule retention.
3Productivity
If cells are sprayed directly onto wound site, then rapid skin regeneration is achieved, but the method is limited to immediate post-burn treatment
Solution Approach 1:
The patent applies preliminary action by preparing cells and encapsulating them in advance, creating stable capsule structures that can be stored and transported while maintaining cell viability. The capsules are formed with protective materials and can be kept in a dormant state until needed. This allows the regenerative treatment to be applied not only immediately after injury but also at later stages, extending the effective treatment window while maintaining rapid regeneration capability when the capsules are activated.
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 method maintains core material stability and viability, allows selective activation of cells, and enables efficient growth of tissues or organs by providing a stable and controlled environment for cellular differentiation and growth, overcoming previous limitations in cell retention and tissue complexity.
Implementation Method 1
electrostatic spraying and deposition on a substrate
Data Source
AI summary
Disclosed herein is a multicellular lay-up process. The process comprises the steps of: a) forming a core material, b) forming a capsule material, c) encapsulating the core with the capsule material, d) adding the capsule to a substrate, and e) exposing the capsule to at least one bioactivating agent.