Ceramide Dimer Skin Barrier Stabilization via Sulfur Linker
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Solution Overview
Problem
Existing ceramide-based topical preparations for stabilizing the skin barrier are inefficient due to significant metabolism and complexity in synthesis, limiting their effectiveness in addressing ceramide deficiencies in the stratum corneum.
Innovation Solution
Development of ceramide dimers linked by a dicarboxylic acid with a carbon chain of 4 to 40 atoms, optionally substituted with 1-5 sulfur atoms, forming amide bonds with amino alcohols like sphingosine and phytosphingosine, increasing water binding capacity and membrane-spanning properties for enhanced skin barrier stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ceramides are supplied externally through topical preparations to eliminate ceramide deficiencies in the stratum corneum, then the skin barrier function is improved, but the ceramides are subject to significant metabolism and are inefficient
Solution Approach 1:
The invention segments the ceramide structure by linking two ceramide molecules through a dicarboxylic acid bridge, creating a ceramide dimer. This segmentation approach transforms the single ceramide unit into a dimeric structure that resists metabolism while maintaining skin barrier stabilization function.
Solution Approach 2:
The invention creates a composite structure by combining two ceramide molecules with a dicarboxylic acid linker (containing sulfur atoms in the carbon chain). This composite ceramide dimer structure provides enhanced stability against metabolism compared to individual ceramide molecules, while still effectively stabilizing the skin barrier.
2Reliability
If ceramide dimers are synthesized using existing methods with long-chain dicarboxylic acids consisting of CH2 groups or ether groups, then the skin barrier stabilization is achieved, but the synthesis complexity increases
Solution Approach 1:
The invention changes the chemical composition parameter of the dicarboxylic acid linker by incorporating sulfur atoms into the carbon chain (replacing some CH2 groups with sulfur atoms). This parameter change simplifies the synthesis methodology while maintaining the skin barrier stabilization effect, as the sulfur-containing dicarboxylic acid provides similar or enhanced functionality with simpler synthetic routes.
3Reliability
If the dicarboxylic acid chain length is increased to 4-40 carbon atoms to achieve membrane-spanning properties, then the skin barrier function is enhanced, but the molecular complexity increases
Solution Approach 1:
The invention applies local quality by introducing sulfur atoms at specific positions within the dicarboxylic acid carbon chain (rather than uniformly throughout). This localized modification provides the necessary membrane-spanning properties and skin barrier stabilization with a more manageable molecular complexity compared to uniformly complex long chains.
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 ceramide dimers effectively stabilize the stratum corneum lipid double layers, improving the skin barrier function and providing a simpler synthesis method for ceramide-based treatments, addressing ceramide deficiencies and enhancing the treatment of skin diseases related to lipid composition disturbances.
Implementation Method 1
the amino alcohols are linked with amide bonds via a dicarboxylic acid
Implementation Method 2
the polarity and thus the bipolar character of the compounds are increased by the additional hydrophilic groups, which results in a greater water binding capacity
Implementation Method 3
SC lipids form lipid double layers and consist of the free fatty acids, cholesterol and its derivatives as well as the ceramides
Data Source
AI summary
The invention relates to ceramide dimers in which the amino alcohols are linked together by amide bonds via a dicarboxylic acid. The dicarboxylic acids have at least one sulfur atom in the chain. The invention also relates to a method for producing the ceramide dimers. The ceramide dimers are used as active ingredients to stabilize the skin barrier in cosmetic and pharmaceutical preparations.