Free Fatty Acid Antimicrobial Composition with Membrane Lipid Emulsification
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Solution Overview
Problem
Free fatty acids, known for their antimicrobial properties, are insoluble in water and incompatible with conventional excipients, limiting their medicinal use. Their salts are soluble but have reduced antimicrobial effects.
Innovation Solution
An antimicrobial composition comprising saturated or unsaturated free fatty acids, preferably with 4 to 22 carbon atoms, combined with membrane lipids or their hydrolysed derivatives as emulsifying agents, allowing for water-dispersible formulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If free fatty acids are used as antimicrobial agents, then antimicrobial effect is improved, but solubility in water deteriorates
Solution Approach 1:
The patent uses membrane lipids as intermediary substances to solubilize free fatty acids in aqueous environments. The membrane lipids form micellar structures that encapsulate the hydrophobic free fatty acids, allowing them to be dispersed in water while maintaining their antimicrobial activity. This resolves the contradiction by introducing a mediator that bridges the incompatible hydrophobic fatty acids and hydrophilic aqueous environment.
Solution Approach 2:
The patent changes the physical state and aggregation form of free fatty acids from individual molecules to micellar structures through controlled parameters such as concentration, temperature, and pH. By adjusting these parameters, the fatty acids self-assemble into water-dispersible micelles with membrane lipids, transforming their solubility characteristics while preserving antimicrobial efficacy.
2Ease of manufacture
If free fatty acids are combined with conventional excipients, then formulation compatibility is improved, but antimicrobial effect deteriorates
Solution Approach 1:
The patent extracts and eliminates conventional excipients from the formulation system, replacing them with membrane lipids that are biocompatible and do not interfere with antimicrobial activity. This selective removal of incompatible components resolves the contradiction between formulation compatibility and antimicrobial effectiveness.
Solution Approach 2:
The patent creates a composite formulation system consisting of free fatty acids combined with membrane lipids. This composite structure provides both formulation stability and preserved antimicrobial activity, as the membrane lipid-fatty acid complex maintains the bioactivity of the fatty acids while enabling proper formulation characteristics.
3Quantity of substance
If salts of free fatty acids are used, then solubility in water is improved, but antimicrobial effect deteriorates
Solution Approach 1:
Instead of converting free fatty acids to their salt forms (which improves solubility but reduces activity), the patent inverts the approach by keeping the fatty acids in their free, active form and using membrane lipids to provide the solubility benefit. This inversion resolves the contradiction by achieving solubility enhancement through a different mechanism that does not compromise antimicrobial activity.
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 achieves a dual antimicrobial effect by inhibiting microbial adhesion and exerting a microbicidal effect through membrane dissolution, with superior adhesion inhibitory properties persisting even after the microbicidal payload is depleted.
Implementation Method 1
one or more membrane lipids or a hydrolysed derivative thereof, as emulsifying agent for the free fatty acid(s)
Data Source
AI summary
The invention concerns antimicrobial compositions comprising free fatty acids emulsified with membrane lipids or hydrolysed derivatives thereof, and pharmaceutical formulations comprising same. The compositions can be used in the treatment of prophylaxis of microbial infections. They can also regulate the rate of blood clotting rendering them suitable for incorporation in catheter locking solutions and for use in wound care.