Cryopreservation Medium Stabilizing Cell Membranes
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Solution Overview
Problem
Current cryopreservation methods cause damage to cells and tissues due to temperature depression, including DNA breakage, membrane integrity loss, and contamination risks, which affect the integrity and functionality of specimens, especially during the freezing and thawing processes.
Innovation Solution
The use of plant-derived extracts and specific compounds in cryopreservation media to stabilize cell membranes, reduce oxidative stress, and prevent contamination, maintaining in vivo-like homeostasis and functionality of cells during temperature depression and subsequent warming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If temperature depression (freezing/cryopreservation) is applied to preserve cells and tissues, then long-term storage capability is improved, but cellular damage (DNA breakage, membrane integrity loss, organellular rearrangement) increases
Solution Approach 1:
The patent introduces a protective medium containing specific compounds (including antioxidants, cryoprotectants, and stabilizers) as an intermediary substance between the freezing process and the cells. This medium acts as a mediator that absorbs harmful effects during temperature depression while maintaining cellular integrity, thereby enabling long-term storage without compromising cell viability or function.
Solution Approach 2:
The patent modifies the chemical and physical parameters of the storage environment by formulating a protective medium with specific concentrations of antioxidants (vitamin E, glutathione), cryoprotectants (glycerol, sucrose), and stabilizing compounds. These parameter changes create optimal conditions that allow cells to withstand freezing temperatures while maintaining membrane integrity and preventing DNA damage, thus resolving the contradiction between storage duration and cellular reliability.
2Reliability
If cryoprotectants are used to protect cells during freezing, then freezing tolerance is improved, but toxicity to cell functionality increases (cytoskeletal reorganization, metabolism suppression, membrane composition shifts)
Solution Approach 1:
The patent combines multiple protective agents in a single integrated protective medium, including antioxidants (vitamin E, glutathione, edaravone), cryoprotectants (glycerol, sucrose, trehalose), and stabilizing compounds (melatonin, resveratrol, curcumin). This merging of functions allows the medium to provide freezing tolerance through cryoprotectants while simultaneously counteracting toxicity through antioxidants and stabilizers, achieving protective effects without harmful side effects.
Solution Approach 2:
The patent converts the potentially harmful effects of cryoprotectants (which can cause cytoskeletal reorganization and metabolism suppression) into beneficial effects by pairing them with antioxidants and stabilizing compounds. The antioxidants neutralize reactive oxygen species generated by cryoprotectant treatment, while stabilizers maintain membrane composition and prevent cytoskeletal damage, thereby transforming the harmful side effects into protective benefits.
3Duration of action of moving object
If cells are stored at high temperatures (−20° C. to −40° C.), then metabolism is slowed, but reactive compound generation increases (oxidative, nitrogenative, sulfative damage)
Solution Approach 1:
The patent employs strong antioxidants (vitamin E, glutathione, edaravone) that can rapidly neutralize reactive oxygen species, nitrogenative compounds, and sulfative agents generated during metabolic activity at elevated storage temperatures. These antioxidants act as powerful protective agents that prevent oxidative, nitrogenative, and sulfative damage, allowing cells to be stored at temperatures that slow metabolism without generating harmful reactive compounds.
Solution Approach 2:
The protective medium serves as an intermediary that intercepts reactive compounds before they can damage cellular structures. The medium contains antioxidants that scavenge reactive oxygen species, nitrogenative compounds, and sulfative agents, thereby protecting cells from temperature-induced metabolic byproducts while maintaining slowed metabolism for long-term preservation.
4Strength
If rapid freezing/vitrification is applied to prevent ice crystal formation, then membrane damage is reduced, but osmotic stress and cellular dehydration increase
Solution Approach 1:
The patent adjusts the osmolarity and chemical composition parameters of the protective medium to include osmoprotectants (polyols, sugars) and osmolytes that regulate cellular water balance during rapid freezing. These parameter modifications allow cells to withstand osmotic stress and dehydration during vitrification while maintaining membrane integrity, as the protective medium compensates for water loss and maintains cellular homeostasis.
Solution Approach 2:
The protective medium is prepared in advance with cryoprotectants and osmoprotectants that cushion cells against the stresses of rapid freezing and osmotic dehydration. The medium contains stabilizing compounds and osmolytes that prevent membrane damage before it occurs, allowing rapid freezing to proceed without causing excessive osmotic stress or cellular dehydration.
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 approach minimizes cellular damage, maintains organelle distribution and function, and reduces contamination risks, leading to improved viability and functionality of cells and tissues post-thaw, enhancing the success of in vitro to in vivo transitions.
Implementation Method 1
The use of plant-derived extracts and specific compounds in cryopreservation media to stabilize cell membranes, reduce oxidative stress
Implementation Method 2
prevent contamination
Implementation Method 3
depression of temperature such as cooling or cryopreservation may generally be a good method for long and/or even short-term preservation of specimens
Data Source
AI summary
Embodiments of the present invention provide ways to reduce detrimental impacts to in vitro and in vivo specimens (8) from temperature depression with certain medium (9) and may include providing a protective layer (7) around a droplet (12) which may contain a medium and a specimen before subjecting to temperature depression. Other embodiments may provide treatment to a recipient environment (41) before implantation of a specimen (40) which has been subjected to a temperature depression.