Non-Toxic Cryoprotective Composition for Cellular Integrity
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Solution Overview
Problem
Traditional cryopreservation techniques cause cellular damage due to ice crystal formation and osmotic issues, leading to cell death during freezing and thawing, and existing cryoprotectants like DMSO and glycerol are toxic and cause side effects.
Innovation Solution
A composition comprising polyethylene glycol (PEG), saccharides such as trehalose and dextran-40, and organic amphoteric agents like ectoin and hydroxyectoin is used to protect cells and tissues during cryopreservation, maintaining cellular integrity and viability through multiple freeze/thaw cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cryoprotectants like DMSO and glycerol are used, then cellular protection during freezing is achieved, but toxicity and side effects occur
Solution Approach 1:
The patent changes the chemical parameters of cryoprotective agents by using non-toxic alternatives such as sugars (trehalose, sucrose), polyols (sorbitol, mannitol), and amino acids (taurine, glycine) instead of traditional toxic cryoprotectants like DMSO and glycerol. These alternative substances provide comparable or superior cellular protection without the harmful side effects, thereby resolving the contradiction between effectiveness and toxicity.
Solution Approach 2:
The patent employs naturally occurring, biocompatible substances that are non-toxic and can be easily removed or metabolized by cells. These include common sugars and amino acids that are already present in biological systems, making them safe for prolonged cell storage and eliminating the need for complex removal procedures required by toxic cryoprotectants.
2Duration of action of stationary object
If freezing is performed to preserve cells, then biological activity is stopped, but ice crystal formation causes cellular damage
Solution Approach 1:
The patent introduces intermediary substances (cryoprotective agents such as trehalose, sucrose, sorbitol, mannitol, taurine, and glycine) that mediate between the freezing process and cellular structures. These intermediaries prevent direct contact between ice crystals and cell membranes, thereby protecting cells from mechanical damage while allowing long-term frozen storage.
Solution Approach 2:
The patent applies cryoprotective agents to cells before freezing to provide preemptive protection. These agents accumulate around cellular structures in advance, creating a protective environment that cushions cells against the formation and expansion of ice crystals during the freezing process, thereby preventing cellular damage before it occurs.
3Adaptability or versatility
If freezing and thawing cycles are performed, then cell storage and retrieval is enabled, but osmotic stress leads to cell death
Solution Approach 1:
The patent modifies the osmotic parameters of the freezing medium by incorporating non-toxic cryoprotective agents that maintain osmotic balance during freeze-thaw cycles. Substances like sugars and polyols adjust the osmotic pressure to prevent excessive water movement in and out of cells, thereby maintaining cell viability through multiple storage and retrieval cycles.
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 composition effectively prevents cellular damage by reducing ice crystal formation and osmotic stress, improving post-thaw cell viability and function, and is non-toxic, thus overcoming the limitations of traditional cryoprotectants.
Implementation Method 1
Cryopreservation is a process where biological samples such as cells or whole tissues are preserved by cooling to low sub-zero temperatures
Implementation Method 2
Traditional cryopreservation techniques cause cellular damage due to ice crystal formation and osmotic issues
Data Source
AI summary
Compositions for maintaining cellular integrity especially in cases of cryopreservation and multiple freeze/thawing cycles are provided. In addition, the compositions can be used in various media for a variety of applications.