LX9211 Solid State Forms for Stability and Bioavailability
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Solution Overview
Problem
There is a need for additional solid state forms of LX9211, including crystalline polymorphs, salts, and cocrystals, to improve processing properties, stability, and bioavailability for the treatment of Diabetic Peripheral Neuropathic pain and Post-Herpetic Neuralgia.
Innovation Solution
The development of crystalline polymorphs, salts, and cocrystals of LX9211, including dihydrogen phosphate, hemihydrogen phosphate, camsylate, and cocrystals with urea or phosphoric acid, which can be used to prepare pharmaceutical compositions with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If new solid state forms of LX9211 are developed, then processing properties and stability are improved, but the complexity of the formulation development process increases
Solution Approach 1:
The patent performs preliminary crystallization studies to identify and characterize multiple polymorphic forms of LX9211 before formulation development. By pre-establishing the crystal structure database and selecting the most stable form (Form A), the patent reduces later formulation complexity and accelerates development of stable pharmaceutical compositions.
2Ease of operation
If different salts and solid state forms are used, then dissolution profile and bioavailability can be improved, but the difficulty of purification and handling increases
Solution Approach 1:
The patent systematically varies crystallization parameters (solvent type, temperature, pH, concentration) to produce different solid state forms with optimized dissolution profiles. By establishing structure-property relationships, the patent enables selection of forms with improved bioavailability while maintaining manageable purification protocols through controlled crystallization conditions.
3Adaptability or versatility
If multiple polymorphic forms are characterized, then formulation options are expanded, but the time and resources required for characterization increase
Solution Approach 1:
The patent segments the characterization process into distinct modules: initial screening by XRPD, detailed structural analysis by single-crystal XRD for promising forms, and complementary thermal analysis by DSC/TGA. This segmented approach efficiently identifies and characterizes multiple polymorphic forms (Forms A-D) without requiring exhaustive analysis of every possible crystal form, thus expanding formulation options while managing time and resource investment.
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
These solid state forms offer improved stability, solubility, and processing characteristics, potentially leading to better bioavailability and efficacy in treating Diabetic Peripheral Neuropathic pain and Post-Herpetic Neuralgia.
Implementation Method 1
Polymorphism, the occurrence of different crystalline forms, is a property of some molecules and molecular complexes. A single molecule may give rise to a variety of polymorphs having distinct crystal structures and physical properties
Data Source
AI summary
The present disclosure encompasses solid state forms of LX9211, salts and cocrystals thereof, in embodiments processes for preparation thereof, and pharmaceutical compositions thereof.