Polystyrene Microcarrier Density Tuning for Cell Separation
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Solution Overview
Problem
Existing microcarriers for cell culture face challenges in separating cells due to limited density ranges, leading to difficulties in centrifugation, clogging, and physical damage, while maintaining sufficient yield and dispersibility in bioreactors.
Innovation Solution
Development of polystyrene-based microcarriers with controlled density (0.99-1.04 g/cm³) using specific monomer compounds, enabling separation by density difference and improving dispersibility in cell culture reactors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microcarriers with density 1.05-1.3 g/cm³ are used, then cell adhesion is sufficient, but separation from cells by density difference becomes difficult
Solution Approach 1:
The patent applies parameter changes by precisely controlling the density of microcarriers to 0.99 g/cm³, which is lower than conventional microcarriers (1.05-1.3 g/cm³). This density parameter was optimized to achieve a density difference of at least 0.02 g/cm³ compared to cells, enabling effective separation by centrifugation while maintaining sufficient cell adhesion capacity through appropriate surface area and culture conditions
2Ease of manufacture
If microcarriers with density lower than 1.0 g/cm³ are fabricated, then separation from cells is improved, but dispersibility in bioreactors deteriorates
Solution Approach 1:
The patent optimizes the density parameter to 0.99 g/cm³, which is sufficiently low to enable separation from cells (density difference ≥0.02 g/cm³) but high enough to ensure good dispersibility in bioreactors. This balanced parameter selection resolves the contradiction between separability and dispersibility
3Stability of the object's composition
If microcarriers with density 1.05-1.3 g/cm³ are used, then structural stability is maintained, but centrifugation causes clogging and physical damage
Solution Approach 1:
The patent changes the density parameter from the conventional 1.05-1.3 g/cm³ to 0.99 g/cm³. This lower density reduces the compactness and rigidity of the microcarrier structure, making it more flexible and less prone to physical damage during centrifugation, while still maintaining sufficient structural stability for cell adhesion and culture
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
The solution allows for efficient separation of cells and microcarriers post-culture, reducing physical damage and contamination, while maintaining high cell adhesion and culture efficiency.
Implementation Method 1
having an apparent density of 0.99 g/cm³ and a density difference with cells of 0.02 g/cm³ or more, thereby allowing separation by density difference
Implementation Method 2
at least one of R1 to R5 is an alkyl group having one or more carbon atoms
Data Source
AI summary
The present disclosure relates to a microcarrier for cell culture comprising polystyrene-based particles, a preparing method for the microcarrier for cell culture, and a cell culture composition using the same.