Electrospun Cell Scaffolds with Embedded Live Cells
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Solution Overview
Problem
Current methods for producing electrospun cell scaffolds require time-consuming cell seeding and often result in non-uniform cell distribution due to limited cell diffusion, leading to varied properties and reduced scaffold longevity.
Innovation Solution
Incorporating live cells directly into the electrospun fibers using a protectant polymer and biocompatible solvent during the electrospinning process, allowing for the production of scaffolds with cells embedded within the fibers, which maintains cell viability and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cells are seeded onto scaffolds after scaffold formation, then cell incorporation is achieved, but the process becomes time-consuming and cell distribution becomes non-uniform
Solution Approach 1:
The patent combines the scaffold formation process and cell incorporation process into a single simultaneous electrospinning operation. Cells are mixed with the polymer solution before electrospinning, allowing cells to be embedded within the fibers as they are formed, rather than seeding cells onto pre-formed scaffolds. This merging of processes eliminates the sequential steps and achieves both uniform distribution and time efficiency.
Solution Approach 2:
The patent performs preliminary action by mixing cells with the polymer solution before the electrospinning process begins. This pre-combination ensures cells are uniformly distributed throughout the solution that will form the scaffold fibers, eliminating the need for post-formation cell seeding and ensuring uniform incorporation from the start.
2Productivity
If cells are differentiated and seeded separately, then cell viability is maintained, but the overall process complexity and time increase
Solution Approach 1:
The patent merges multiple separate processes (scaffold formation, cell differentiation, and cell seeding) into a single integrated electrospinning process. By combining these operations simultaneously, the patent reduces process complexity and increases productivity without sacrificing cell viability or requiring separate equipment for each step.
Solution Approach 2:
The electrospinning process is made multi-functional, serving simultaneously as the scaffold formation method, cell delivery mechanism, and cell distribution system. This universal approach eliminates the need for separate specialized processes for each function, thereby reducing overall process complexity while maintaining high productivity.
3Reliability
If cells are incorporated after scaffold creation, then scaffold structure is established, but cell diffusion is limited and distribution varies
Solution Approach 1:
The patent applies preliminary action by uniformly distributing cells throughout the polymer solution before electrospinning begins. This pre-distribution ensures that cells are evenly incorporated into the scaffold structure as it forms, eliminating the diffusion limitations and non-uniformity that occur when cells are added afterward. The result is consistent cell distribution throughout the scaffold, improving both reliability and precision.
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 enables the creation of scaffolds with uniform cell distribution and enhanced cell viability, improving the longevity and effectiveness of tissue engineering applications by integrating cells directly into the scaffold fibers during the electrospinning process.
Implementation Method 1
When the electrostatic force on the polymer solution is enough to overcome the surface tension, a jet of polymer solution will form and eventually travel towards the collector plate
Implementation Method 2
When the electrostatic force on the polymer solution is enough to overcome the surface tension, a jet of polymer solution will form
Implementation Method 3
Incorporating live cells directly into the electrospun fibers using a protectant polymer and biocompatible solvent during the electrospinning process, allowing for the production of scaffolds with cells embedded within the fibers, which maintains cell viability and functionality
Data Source
AI summary
Cell scaffolds are provided comprising an electrospun fiber and one or more live cells that are incorporated directly into the electropsun fiber during an electrospinning process. The cell scaffold further include a protectant polymer that reduce damage to the cells during the electrospinning process and in which the live cells are embedded following electrospinning. Methods of making a cell scaffold including one or more live cells are further provided and comprise mixing one or more live cells with a protectant polymer and a biocompatible solvent to form a solution, and electrospinning the solution at a working voltage of about 8 kV to about 35 kV. Such methods can make use of a stem cell and a working voltage sufficient to differentiate the stem cell, including differentiation into a chondrocyte.