Human Salty Taste Receptor Modulation via ENaC
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Solution Overview
Problem
Current methods for reducing sodium intake lack effective salty taste mimics or enhancers that replicate the clean saltiness of sodium chloride, and the mechanism of salty taste perception in humans remains unclear, particularly due to the discrepancy between human and animal models.
Innovation Solution
Identification of the human salty taste receptor comprising beta, gamma, and delta polypeptide subunits, and a method for assembling these subunits in a lipid membrane to contact with test compounds, determining modulation of biological activity, and using this approach to identify modulators of epithelial sodium ion channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sodium chloride is used to provide salty taste, then clean saltiness is achieved, but excessive sodium intake leads to health problems
Solution Approach 1:
The patent uses ENaC ion channels as intermediaries to detect sodium ions and generate salty taste sensation. By identifying this specific biological mediator, the invention enables development of compounds that can activate the same pathway without requiring actual sodium chloride, thus providing salt substitutes that mimic the taste mechanism at its molecular level.
Solution Approach 2:
The patent changes the parameter from actual sodium ion presence to compounds that activate sodium ion detection pathways. By modifying the chemical parameter from NaCl to ENaC activators, the system maintains the salty taste effect while eliminating the harmful sodium intake, resolving the contradiction between taste quality and health safety.
2Measurement precision
If amiloride is used to block ENaC channels in animal models, then salty taste response is inhibited, but the same approach does not work in human beings
Solution Approach 1:
The patent identifies that human taste cells have distinct local characteristics compared to animal models. Specifically, human ENaC channels in taste cells exhibit different pharmacological properties and localization patterns, requiring species-specific approaches. This local quality difference explains why amiloride works in animals but not humans, and guides the development of human-specific modulators.
Solution Approach 2:
Instead of using amiloride blockade as the primary approach, the patent inverts the strategy by using ENaC activators and modulators that enhance or mimic sodium activation. This inversion allows identification of compounds that work through the same pathway as sodium but with different pharmacological properties suitable for human taste cells.
3Reliability
If only sodium chloride and lithium chloride are used, then true salty taste is achieved, but structural specificity limits the development of salt substitutes
Solution Approach 1:
The patent discovers that ENaC channels serve as a universal receptor for multiple cations including sodium and lithium. By identifying this universal biological target, the invention expands the scope from only NaCl and LiCl to include any compound that can activate ENaC channels, thereby achieving both taste authenticity and compound versatility through the common ENaC activation mechanism.
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
Enables the identification of compounds that modulate salty taste perception in humans, potentially reducing sodium intake while maintaining flavor, and provides a clearer understanding of the salty taste perception mechanism.
Implementation Method 1
an epithelial sodium channel (ENaC) acts as the primary receptor for saltiness
Implementation Method 2
assembling at least one epithelial sodium ion channel in a lipid membrane
Data Source
AI summary
Methods for identifying modulators of the epithelial sodium ion channel and for identifying modulators of salty taste perception are described. Also featured are isolated human salty taste receptors, artificial lipid bilayers comprising an epithelial sodium ion channels, and kits for practicing the claimed methods.