SAMe Stabilization Using Ascorbic Acid and Crystallization
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Solution Overview
Problem
S-adenosyl-L-methionine (SAMe) is thermally unstable and has a short storage stability, limiting its long-term storage and commercial viability despite existing stabilization methods.
Innovation Solution
Adding ascorbic acid or its salts to a SAMe-containing composition liquid, followed by drying or crystallization, enhances storage stability by forming stable crystallized deposits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stabilization methods (chromatography, salt conversion) are used, then SAMe purity is improved, but storage stability remains short (about one month under acceleration test conditions)
Solution Approach 1:
The patent changes the chemical parameters of the SAMe composition by introducing ascorbic acid (vitamin C) as a stabilizing agent and controlling the pH to acidic range (1-3). This parameter modification transforms the unstable SAMe into a stable crystallized deposit form, extending shelf life from one month to over one year under acceleration test conditions (40°C, 75% humidity).
Solution Approach 2:
The patent creates a composite stabilization system combining SAMe with ascorbic acid and sulfuric acid in specific ratios. This composite approach forms a protective matrix around SAMe molecules, preventing decomposition while maintaining purity. The synergistic effect of ascorbic acid (antioxidant) and sulfuric acid (pH control) provides enhanced stability compared to single-agent methods.
2Productivity
If SAMe is produced by fermentation or enzymatic synthesis, then production efficiency is improved, but thermal instability causes rapid decomposition during processing and storage
Solution Approach 1:
The patent applies preliminary stabilization actions during the production process itself. Ascorbic acid and sulfuric acid are added to the fermentation broth or enzymatic reaction mixture before SAMe is formed. This preliminary protection prevents thermal decomposition during subsequent processing steps (drying, crystallization, storage), allowing efficient production methods to be maintained while ensuring stability.
Solution Approach 2:
Ascorbic acid acts as an intermediary protective agent between the thermally labile SAMe and the harsh processing conditions. It forms a protective chemical environment (acidic pH, antioxidant shield) that mediates the interaction between SAMe and heat/humidity, preventing direct decomposition while allowing efficient production processes to proceed.
3Reliability
If SAMe salts are prepared using sulfuric acid or p-toluenesulfonic acid, then some stability improvement is achieved, but the stabilization period is still limited to about one month under acceleration test conditions
Solution Approach 1:
The patent enhances the existing salt stabilization approach by creating a composite system with ascorbic acid. The combination of SAMe-sulfate salt, ascorbic acid, and sulfuric acid produces a synergistic effect where ascorbic acid provides additional antioxidant protection and pH buffering, extending shelf life from one month to over one year. This composite approach builds upon rather than replaces the traditional salt stabilization method.
Solution Approach 2:
The patent modifies the chemical parameters of the stabilization system by introducing ascorbic acid at specific concentrations (0.1-2.0 times the mole amount of SAMe) and controlling pH to acidic range (1-3). These parameter changes transform the temporary stability of SAMe salts into long-term stability, achieving over one year shelf life under acceleration test conditions.
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 method significantly improves SAMe's storage stability under accelerated conditions, reducing decomposition and maintaining purity, allowing for longer shelf life and improved commercial applications.
Implementation Method 1
adding at least ascorbic acids or salts thereof to a composition liquid containing SAMe
Implementation Method 2
drying the above composition liquid or separating and drying a crystallized deposit obtained from the above composition liquid
Implementation Method 3
separating and drying a crystallized deposit obtained from the above composition liquid
Data Source
AI summary
Provided are a process for producing a S-adenosyl-L-methionine-containing composition which is very excellent in a stability by adding at least ascorbic acids or salts thereof to a composition liquid containing S-adenosyl-L-methionine and then drying the above composition liquid or separating and drying a crystallized deposit obtained from the above composition liquid, a S-adenosyl-L-methionine-containing composition obtained by the above production process and a molding obtained from the above composition.