Saccharide Sustained-Release Matrix for pH-Independent Stability
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Solution Overview
Problem
Existing saccharide compositions struggle with pH-dependent release due to hydrophobic polymers and hygroscopicity issues, leading to inconsistent release and stability problems, particularly affecting diabetic patients with nocturnal hypoglycemia.
Innovation Solution
A sustained-release saccharide composition using a combination of hydroxypropyl methylcellulose and sodium alginate, with optional additives like film-forming agents and anti-adherents, to achieve stable, pH-independent release and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If hydrophobic polymers are added to modulate sustained saccharide release, then the sustained-release effect is improved, but the product stability deteriorates due to pH dependence and individual differences
Solution Approach 1:
The patent changes the chemical composition parameters of the sustained-release agent from traditional hydrophobic polymers to a specific combination of hydroxypropyl methylcellulose (HPMC) and sodium alginate. This parameter change eliminates pH dependence while maintaining sustained-release functionality, resolving the contradiction between sustained-release effect and product stability
Solution Approach 2:
The patent uses a composite material system combining HPMC and sodium alginate in specific ratios (HPMC:alginate = 9:1 to 1:9). This composite approach leverages the complementary properties of both materials - HPMC provides sustained-release capability while sodium alginate enhances stability and reduces hygroscopicity, thereby resolving the contradiction between sustained-release effect and product stability
2Speed
If saccharides with high solubility are used, then the dissolution speed is improved, but the sustained-release effect deteriorates due to complete digestion and absorption in a short time
Solution Approach 1:
The patent applies local quality modification by coating the saccharide core with a sustained-release matrix layer. The core maintains high solubility for rapid initial dissolution, while the surrounding matrix layer controls the release rate, creating different functional zones that resolve the contradiction between dissolution speed and sustained-release effect
Solution Approach 2:
The patent creates a dynamic release system where the saccharide dissolution and matrix degradation occur at different rates. The high-solubility saccharide dissolves quickly initially, but the sustained-release matrix progressively releases it over time, creating a dynamic balance between fast dissolution and sustained release
3Ease of manufacture
If saccharides are used without coating, then the preparation process is simplified, but the product stability deteriorates due to high hygroscopicity and poor compressibility
Solution Approach 1:
The patent applies preliminary action by pre-coating the saccharide particles with the sustained-release matrix before tableting. This preliminary coating protects the hygroscopic saccharides from moisture during storage and handling, improving product stability without significantly complicating the overall preparation process
Solution Approach 2:
The patent uses composite materials where the saccharide core is combined with the sustained-release matrix coating. This composite structure addresses the poor compressibility and high hygroscopicity of pure saccharides while maintaining ease of manufacture through a straightforward coating and compression process
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 composition provides a stable, sustained-release profile that effectively manages nocturnal hypoglycemia by maintaining blood glucose levels, reducing the risk of fatal hypoglycemic events.
Implementation Method 1
a sustained-release saccharide composition, comprising a saccharide and a sustained-release agent
Implementation Method 2
it may be difficult to control and maintain a stable nocturnal blood glucose concentration due to individual differences, specifically, differences in the digestive and absorption capacity
Implementation Method 3
The pH value changes in a stepwise manner in the gastrointestinal environment in the human body, which may be influenced by various factors... Therefore the pH dependence of such hydrophobic polymers added for modulating sustained saccharide release may result in individual differences
Implementation Method 4
a stable, sustained-release profile that effectively manages nocturnal hypoglycemia by maintaining blood glucose levels
Data Source
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AI summary
A saccharide sustained-release composition and a preparation method therefor. Provided is the saccharide sustained-release composition. The composition comprises a saccharide substance and a sustained-release agent, the sustained-release agent comprising at least two selected from hydroxypropyl methylcellulose, sodium alginate, cellulose, methyl cellulose, ethyl cellulose, microcrystalline cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, polyethylene oxide, a carboxyvinyl polymer, polyoxyethylene, a polyvinyl acetate aqueous dispersion, glycerol monooleate, glycerol monostearate, a carbomer homopolymer, a carbomer interpolymer, carrageenan, shellac, guar gum, xanthan gum, alginic acid and starch.