Stabilizer-Free 5,10-CH2-(6R)-THF Solutions for Oxidation Stability
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Solution Overview
Problem
Existing pharmaceutical compositions of 5,10-methylene-(6R)-tetrahydrofolic acid (5,10-CH2-(6R)-THF) are susceptible to oxidation and chemical degradation, particularly in aqueous solutions, limiting their stability and effectiveness in medicinal applications, and often require the use of stabilizers that can cause adverse clinical effects.
Innovation Solution
Development of highly concentrated aqueous solutions of 5,10-CH2-(6R)-THF with a pH between 8 and 9.5, free from stabilizers, buffers, and reducing agents, which maintain high purity and stability for at least 8 days, allowing for stable liquid and solid-state pharmaceutical compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stabilizers such as citrate, ascorbic acid, or other antioxidant agents are added to 5,10-CH2-(6R)-THF compositions, then chemical stability and oxidation resistance are improved, but the compositions exhibit adverse clinical effects and increased device complexity
Solution Approach 1:
The patent removes stabilizers and antioxidant agents from the composition formulation, extracting these harmful but stabilizing components while maintaining chemical stability through alternative means (pH control, concentration optimization, and inherent stability of the active ingredient under specific conditions).
Solution Approach 2:
The 5,10-CH2-(6R)-THF composition is formulated to be self-stabilizing through optimization of its own properties (concentration, pH, and molecular structure) without requiring external stabilizing agents, thereby eliminating the harmful effects associated with added stabilizers while maintaining reliability.
2Productivity
If high concentrations of 5,10-CH2-(6R)-THF are used to achieve high intracellular concentrations, then cytotoxic effect is enhanced, but chemical degradation and oxidation increase leading to high impurity levels
Solution Approach 1:
The patent optimizes critical parameters including pH (adjusted to maintain stability), concentration (high but controlled), and formulation conditions to enable high cytotoxic efficacy while preventing chemical degradation and oxidation, thereby achieving both enhanced productivity and maintained reliability.
3Ease of operation
If 5,10-CH2-(6R)-THF is formulated in aqueous solution for pharmaceutical use, then ease of administration is improved, but susceptibility to oxidation and hydrolysis increases
Solution Approach 1:
The patent adjusts pH to optimal levels and controls concentration and formulation conditions to maintain chemical stability in aqueous solution, enabling ease of administration while preventing oxidation and hydrolysis through parameter optimization rather than removing water.
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 stabilizer-free solutions achieve high concentrations of 5,10-CH2-(6R)-THF, maintaining purity and stability, enabling safe and effective use in medicinal applications without the adverse effects associated with traditional stabilizers.
Implementation Method 1
highly concentrated aqueous solutions of 5,10-CH2-(6R)-THF with a pH between 8 and 9.5
Implementation Method 2
5,10-CH2-(6R)-THF is highly susceptible to oxidation and chemical degradation
Data Source
AI summary
The present invention relates to stable high-content solutions comprising 5,10-methylene-(6R)-tetrahydrofolic acid (5,10-CH2-(6R)-THF), which solutions are free of extraneous stabilizing agents.