Sugar-Based Cellular Preservation for Room Temperature Storage
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Solution Overview
Problem
Conventional cryopreservation and vitrification methods for cellular materials require low temperature storage and are not suitable for use in all environments, as they are sensitive to ice formation and growth, and require technical support for rewarming and cryoprotectant elution, which is not feasible in all settings, such as outpatient offices or third world environments.
Innovation Solution
Incubating cellular materials in a culture medium containing low concentrations of sugars like trehalose for extended periods prior to preservation, allowing for increased cell survival during preservation procedures without the need for toxic cryoprotectants or membrane permeabilization techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cryopreservation or vitrification methods are used, then cell survival during preservation is improved, but the method requires low temperature storage and technical support for rewarming and CPA elution, which are not feasible in all environments
Solution Approach 1:
The invention changes the fundamental storage parameter from low temperature to room temperature by using sugar-based preservation. Cells are treated with sugars (trehalose, sucrose, or their mixtures) that replace water in the cellular structure, allowing the cells to be stored at ambient temperatures without requiring cryogenic storage facilities or complex rewarming protocols.
Solution Approach 2:
The invention uses simple, inexpensive sugar-based preservation solutions that can be stored in basic packaging systems. The preservation medium itself is stable and non-toxic, eliminating the need for expensive cryogenic equipment and complex technical support systems while maintaining effective cell preservation.
2Reliability
If high concentrations of cryoprotective agents are used to achieve vitrification, then ice crystal formation is minimized, but the CPAs become potentially toxic to cells
Solution Approach 1:
The invention changes the chemical composition parameter by using sugar-based cryoprotective agents (trehalose, sucrose) instead of traditional CPA mixtures. These sugars are naturally occurring, non-toxic substances that can be used at high concentrations without causing cellular damage, thereby eliminating the toxicity problem associated with conventional CPAs like DMSO and glycerol.
Solution Approach 2:
The invention converts the potential harm of high concentration CPAs into a benefit by using sugars that are naturally safe for cells. The high concentrations of sugar required for vitrification, which would be toxic with traditional CPAs, are instead used as a protective mechanism that stabilizes cellular structures without causing damage, turning a harmful condition into a beneficial preservation state.
3Reliability
If conventional cryopreservation methods are used, then cell preservation is achieved, but the method requires competent technical support during rewarming and CPA elution phase
Solution Approach 1:
The invention extracts and eliminates the complex technical support requirements from the preservation process. By using sugar-based preservation that stabilizes cells at room temperature, the method removes the need for sophisticated rewarming equipment and CPA elution procedures, simplifying the overall system to basic storage and rehydration steps that can be performed in simple packaging systems.
Solution Approach 2:
The invention enables the preservation system to be self-sufficient without requiring external technical support. The sugar-based preservation medium maintains cell stability automatically at room temperature, and rehydration can be performed simply by adding water or culture medium, eliminating the need for monitored rewarming processes and specialized technical intervention during the preservation and recovery phases.
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 method enhances cell survival during preservation procedures, making it possible to store cellular materials at room temperature and rehydrate them in a sterile packaging system, overcoming the limitations of conventional preservation methods.
Implementation Method 1
The protective effects of trehalose and sucrose may be classified under two general mechanisms: (1) 'the water replacement hypothesis' or stabilization of biological membranes and proteins by direct interaction of sugars with polar residues through hydrogen bonding
Implementation Method 2
The protective effects of trehalose and sucrose may be classified under two general mechanisms: (2) stable glass formation (vitrification) by sugars in the dry state
Data Source
AI summary
Living cellular material may be preserved by incubating the cellular material in a culture medium containing at least one sugar, particularly for at least three hours, and then subjecting the cellular material to a preservation protocol, such as freezing, vitrification, freeze-drying and desiccation.