Amphiphilic Nanoparticle Cryopreservation for Ice Damage Reduction
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Solution Overview
Problem
Existing cryopreservation methods, such as those using dimethyl sulfoxide (DMSO), result in low cell survival rates and cellular dysfunction due to ice crystal damage and water loss during freezing and thawing.
Innovation Solution
A composition for cryopreservation using nanoparticles with amphiphilic molecules forming a monolayer or bilayer, preferably cationic with a specific zeta-potential and particle size, encapsulating ferulic acid or activated vitamin C, which acts as a cushion to reduce cellular damage by buffering against external forces and temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If DMSO is used for cell cryopreservation, then cells can be frozen and stored, but cell survival rate after thawing is low and cellular damage occurs
Solution Approach 1:
The patent introduces nanoparticles as an intermediary substance between the cryopreservation environment and the cells. These nanoparticles with amphiphilic molecules form a protective interface that mediates the interaction between the freezing environment and cellular structures, reducing direct damage from ice crystals while maintaining storage capability.
Solution Approach 2:
The patent changes the physical and chemical parameters of the cryopreservation system by introducing nanoparticles with specific properties (amphiphilic molecules, monolayer or bilayer structure, cationic charge, specific zeta-potential range, and controlled particle diameter). These parameter changes create a more favorable microenvironment for cell survival during freezing and thawing.
2Duration of action of stationary object
If cells are frozen using conventional methods, then long-term storage is possible, but ice crystal formation damages cell walls and organelles
Solution Approach 1:
The patent applies beforehand cushioning by introducing nanoparticles into the cryopreservation system before freezing occurs. These nanoparticles position themselves around cellular structures in advance, creating a protective cushion that absorbs and distributes the mechanical stress of ice crystal formation, preventing direct damage to cell walls and organelles.
Solution Approach 2:
The nanoparticles serve as an intermediary layer between the ice crystals and cellular structures. This intermediary prevents direct contact between harmful ice crystals and vulnerable cellular components, thereby protecting against mechanical damage while allowing the freezing process to proceed for long-term storage.
3Ease of operation
If cells are thawed after cryopreservation, then cells can be recovered, but water loss occurs and cell shape changes
Solution Approach 1:
During the thawing process, the nanoparticles continue to serve as an intermediary protective layer. This intermediary helps maintain cellular integrity by preventing uncontrolled water loss and stabilizing cell shape as the cells transition from frozen to thawed states, enabling successful recovery while preserving morphological integrity.
Solution Approach 2:
The nanoparticles modify the physical parameters of the cellular microenvironment during thawing, controlling water movement and maintaining structural stability. This parameter control prevents excessive water loss and shape changes, allowing cells to be recovered in a viable and morphologically intact state.
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 significantly enhances cell survival rates and maintains cellular integrity by minimizing ice crystal formation and preserving cellular shape during freezing and thawing.
Implementation Method 1
a nanoparticle that includes amphiphilic molecules as a constituent, wherein the amphiphilic molecules form a monolayer or bilayer
Implementation Method 2
the nanoparticle... acts as a cushion to reduce cellular damage by buffering against external forces and temperature changes
Implementation Method 3
minimizing ice crystal formation... during freezing and thawing
Data Source
AI summary
It is an object of the present invention to provide a composition for cryopreservation while reducing cell damage due to cryopreservation and to provide a cryopreservation method while reducing cell damage due to cryopreservation. A composition for cryopreservation of a cell or biological tissue, the composition comprising a nanoparticle that comprises amphiphilic molecules as a constituent, wherein the amphiphilic molecules form a monolayer or bilayer, is produced.