Amorphous Solid Dispersion for Stable Oral P2X4 Antagonists
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The present compound, which acts as a P2X4 receptor antagonist, has poor water solubility, leading to inadequate in vivo absorbability when administered orally, and existing methods to improve solubility, such as micronization and solid dispersions, face stability issues during long-term storage.
Innovation Solution
A solid dispersion is formed with specific polymers like hydroxypropylmethylcellulose (HPMC) and sodium lauryl sulfate (SLS) to enhance the in vivo absorbability of the compound, maintaining its amorphous state and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compound is administered orally to improve in vivo absorbability, then the therapeutic effectiveness can be enhanced, but the poor water solubility of the compound limits its absorbability
Solution Approach 1:
The patent changes the physical state parameter of the compound from crystalline to amorphous form. This parameter change dramatically improves water solubility and in vivo absorbability while maintaining the compound's pharmacological activity as a P2X4 receptor antagonist
Solution Approach 2:
The patent creates a composite material system consisting of the amorphous compound combined with specific polymers (hydroxypropylmethylcellulose, ethyl cellulose, or carboxymethyl cellulose). This composite structure maintains the amorphous state during storage and enhances both solubility and stability
2Quantity of substance
If the compound is converted to amorphous state to improve solubility, then in vivo absorbability is enhanced, but the amorphous state is unstable in the presence of moisture during long-term storage
Solution Approach 1:
The patent introduces polymers (hydroxypropylmethylcellulose, ethyl cellulose, or carboxymethyl cellulose) as intermediary substances that interact with the amorphous compound. These polymers act as stabilizing agents that prevent moisture-induced crystallization while maintaining the amorphous state, thus resolving the contradiction between solubility enhancement and storage stability
Solution Approach 2:
The patent creates a protective environment around the amorphous compound using hydrophobic polymers that exclude moisture. This inert-like environment prevents the amorphous compound from transitioning to crystalline form during long-term storage, maintaining both solubility and stability
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 solid dispersion significantly improves the oral absorbability of the P2X4 receptor antagonist, ensuring stable and effective delivery of the compound over time.
Implementation Method 1
it is necessary to convert the poorly soluble compounds into an amorphous state
Implementation Method 2
the poorly soluble compound may transition from an amorphous state to a crystalline state during long-term storage
Data Source
Figure 1
Figure 1
Figure 2
AI summary
The present invention provides a solid dispersion comprising a compound represented by a general formula (I) or (II), or a pharmacologically acceptable salt thereof: or