Enzyme Stabilization via Oligosaccharide Mediators
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Solution Overview
Problem
Current dialysis methods, particularly for patients with end-stage kidney disease, face challenges in efficiently removing urea due to its high production and toxicity, and existing strategies for enzyme stability during storage are inadequate, leading to reduced enzyme activity over time.
Innovation Solution
The use of oligosaccharides in a storage solution, combined with buffer salts, antioxidants, and specific pH conditions, to stabilize enzymes like urease, allowing for prolonged shelf life and retention of activity during storage and sterilization processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional storage methods are used for enzymes, then storage simplicity is maintained, but enzyme activity is lost over time
Solution Approach 1:
The patent introduces oligosaccharides as intermediary substances that mediate between the enzyme and the storage environment. These oligosaccharides form protective complexes with the enzyme, shielding it from denaturation and maintaining its catalytic activity throughout the storage period, thus resolving the contradiction between maintaining simplicity and preserving enzyme function over time
Solution Approach 2:
The patent modifies the storage environment by adjusting pH levels and introducing specific chemical additives (oligosaccharides, antioxidants, chelators). These parameter changes create optimal conditions that prevent enzyme degradation, allowing the enzyme to maintain its activity state during storage without requiring complex refrigeration or special handling
2Duration of action of stationary object
If enzymes are stored for extended periods, then availability is improved, but enzymatic activity decreases
Solution Approach 1:
The patent applies preliminary protective measures by pre-forming enzyme-oligosaccharide complexes and pre-adjusting storage conditions (pH, temperature, chemical environment) before storage begins. This preliminary action prevents degradation pathways from initiating, allowing the enzyme to remain stable and active throughout the extended storage period
Solution Approach 2:
The patent employs relatively inexpensive oligosaccharide molecules as sacrificial protective agents that can be easily replaced. These oligosaccharides serve as temporary protective structures that maintain enzyme stability during storage, providing a cost-effective solution for long-term enzyme availability
3Object-affected harmful factors
If sterilization is applied to storage solutions, then contamination is prevented, but enzyme stability is compromised
Solution Approach 1:
The patent converts the typically harmful effect of sterilization into a beneficial process by using controlled heat treatment or chemical sterilization methods that, when applied at optimized parameters, actually enhance enzyme stability. The sterilization process, when carefully controlled, removes contaminants while the oligosaccharide protective environment prevents any potential damage to the enzyme structure
Solution Approach 2:
The patent modifies sterilization parameters (temperature, time, chemical concentration) to achieve effective contamination prevention while staying within the tolerance range of the enzyme-oligosaccharide complex. By carefully adjusting these parameters, the sterilization process eliminates harmful microorganisms without denaturing the enzyme or disrupting the protective complex
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 significantly enhances the stability and activity retention of enzymes, particularly urease, enabling more effective urea removal and prolonged storage without significant loss of enzymatic activity, even under harsh sterilization conditions.
Implementation Method 1
contacting the enzyme with a storage solution comprising an oligosaccharide to obtain a storage composition
Implementation Method 2
buffer salts, antioxidants, and specific pH conditions, to stabilize enzymes
Implementation Method 3
buffer salts, antioxidants, and specific pH conditions, to stabilize enzymes
Data Source
AI summary
The present invention relates to methods and compositions that are useful for improving the stability of an enzyme, for instance during storage. Using the methods and compositions of the invention, enzyme activity is preserved over time, allowing longer storage.