Alginate Sulfate Cell Treatment Agent for Non-Cytotoxic Detachment
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Solution Overview
Problem
Existing methods for detaching and suspending cells from scaffolds using surfactants or enzymes lead to cytotoxicity and cell death, while alternative methods like temperature-sensitive polymers are costly and difficult to control, and there are no effective substitutes for fetal bovine serum for cell preservation and differentiation prevention.
Innovation Solution
A cell treatment agent containing alginate sulfate, which can detach and suspend cells without cytotoxicity, maintain viability, and prevent differentiation, using alginate sulfate with a sulfate group at position 6 occupying more than 10% of the total, combined with an activator containing polyvalent cations for cell activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If surfactants or cell detachment enzymes are used to detach and suspend cells, then cell detachment is achieved, but cytotoxicity and cell death occur
Solution Approach 1:
The patent introduces an intermediary substance (the cell detachment agent comprising specific peptides or proteins) that mediates the detachment process without directly causing cytotoxicity. This intermediary binds to the scaffold and facilitates cell release while maintaining cell viability, thus resolving the contradiction between effective detachment and harmful cytotoxic effects.
Solution Approach 2:
The patent changes the chemical parameters of the detachment agent by specifying precise peptide sequences, amino acid compositions, and molecular weights. By optimizing these parameters, the agent achieves effective cell detachment while avoiding the cytotoxic effects of conventional surfactants and enzymes, thus resolving the contradiction.
2Object-affected harmful factors
If temperature-sensitive polymers are used to detach and suspend cells, then cell detachment is achieved without cytotoxicity, but cost and device complexity increase
Solution Approach 1:
The patent replaces the mechanical/thermal system (temperature-sensitive polymers requiring heating devices) with a chemical/biological system (cell detachment agents based on specific peptide or protein sequences). This substitution eliminates the need for complex temperature control devices while maintaining non-cytotoxic cell detachment, thus resolving the contradiction between safety and device complexity.
3Reliability
If fetal bovine serum is used for cell preservation, then cell viability is maintained, but ethical issues and infection risks arise
Solution Approach 1:
The patent develops synthetic or recombinant cell preservation agents that can be produced without using fetal bovine serum. These alternative agents maintain cell viability during preservation while eliminating the ethical and infection risks associated with FBS, thus resolving the contradiction between reliability and harmful factors.
Solution Approach 2:
The patent changes the compositional parameters of the preservation medium by replacing FBS with alternative substances having specific chemical compositions and molecular structures. This parameter change maintains the protective function for cell viability while eliminating the harmful factors associated with FBS usage.
4Ease of operation
If cell detachment agents continuously act on cells, then detachment is achieved, but cell weakening and death occur
Solution Approach 1:
The patent implements periodic action by designing cell detachment agents that exert their effect in controlled cycles or phases. The agent is applied, allows action time, then removed or inactivated, preventing continuous exposure that would cause cell weakening. This periodic application pattern resolves the contradiction between effective detachment and maintaining cell viability.
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 alginate sulfate-based agent safely detaches and suspends cells, maintains viability, prevents differentiation, and allows for easy cell adhesion and activation, providing a cost-effective and reliable alternative to surfactants and temperature-sensitive polymers, and eliminating the need for fetal bovine serum.
Implementation Method 1
A cell treatment agent containing alginate sulfate, which can detach and suspend cells without cytotoxicity
Implementation Method 2
maintain viability, and prevent differentiation
Implementation Method 3
combined with an activator containing polyvalent cations for cell activation
Data Source
AI summary
A cell treatment agent containing alginate sulfate as an active ingredient, and a set reagent for activating suspended or dormant cells, which is a combination reagent of the cell treatment agent and an activator containing polyvalent cations are provided.