Selective Chelating Agents for Copper Dysregulation in Neurodegeneration

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Solution Overview

Problem

Current chelating agents for treating neurodegenerative diseases like Wilson's and Alzheimer's, particularly those involving copper dysregulation, suffer from lack of selectivity and toxicity, leading to adverse side effects and inadequate treatment for advanced disease stages.

Innovation Solution

Development of novel compounds derived from nitrilotriacetic acid (NTA) and 1,4,7-triazacyclononane (NOTA) with thiol-functional groups, which act as selective metal-ion-chelating agents, specifically targeting intracellular copper (Cu(I)) and other metal ions, and are designed to be less toxic with masked complexation properties for controlled release.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing chelating agents (D-penicillamine, triethylenetetramine, ammonium tetrathiomolybdate) are used to treat copper accumulation, then copper excretion is increased, but adverse side effects and toxicity occur

Engineering Contradiction:
Improvetreatment effectivenessVSAvoidadverse side effects and toxicity
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent modifies the chemical structure of chelating agents by introducing specific functional groups (hydroxamic acid groups, thiol groups, amino groups) and adjusting molecular parameters to achieve selective binding to copper ions. This structural parameter change enables effective copper chelation while reducing non-specific interactions that cause toxicity, thereby resolving the contradiction between treatment effectiveness and adverse side effects

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The invention designs chelating agents with specific local functional groups positioned to selectively interact with copper ions in the liver. The molecules contain localized binding sites with specific geometries and chemical properties that match copper ion coordination requirements, enabling selective copper removal without affecting other metal ions, thus reducing adverse side effects while maintaining treatment effectiveness

Inventive Principle:
Principle #3Local quality

2Reliability

If strong chelating agents are used to bind copper ions, then copper excretion increases, but selectivity decreases leading to binding of other metal ions

Engineering Contradiction:
Improvecopper chelation efficiencyVSAvoidmetal ion selectivity
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The chelating agents contain localized functional groups (hydroxamic acid, thiol, amino groups) with specific spatial arrangements that create selective binding pockets for copper ions. These local structural features provide geometric and electronic complementarity to copper ion coordination spheres, enabling high selectivity for copper over other metal ions while maintaining strong binding affinity

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The invention combines multiple functional groups (hydroxamic acid groups, thiol groups, amino groups, carboxylic acid groups) into composite chelating agent molecules. This composite structure creates multiple interaction sites with different binding characteristics, where the synergistic effect of these groups provides both strong copper binding affinity and high selectivity through multi-point coordination that is specific to copper ion geometry and electronics

Inventive Principle:
Principle #40Composite materials

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 compounds demonstrate high affinity and selectivity for Cu(I) and other metal ions, reducing toxicity and adverse effects, enabling effective diagnosis, prevention, and treatment of neurodegenerative diseases with improved safety profiles.

Implementation Method 1

chelating agents for metal ions... which increase the excretion of this metal... chelate copper and zinc, but also mercury and lead, and increase the urinary excretion thereof

Methodology Applied
Scientific EffectChelation: Chemical Bonding

Implementation Method 2

novel compounds of formula (I) that can be used as metal-ion-chelating agents... compounds derived from nitrilotriacetic acid (NTA) and 1,4,7-triazacyclononane (NOTA) with thiol-functional groups

Methodology Applied
Scientific EffectCoordinate bonding: Chemical Bonding

Data Source

PatentUS8148359B2Chelating agents of metal ions, their methods of preparation and their applications
Publication Date: 2012.04.03 COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
  • US8148359B2 patent drawing
  • US8148359B2 patent drawing
  • US8148359B2 patent drawing

AI summary

The present invention relates to compounds that can be used as metal-ion-chelating agents or as depolluting agents, corresponding to general formula (I) below:and also to precursor compounds of formula (II) and labelled compounds of formula (III) deriving from the compounds of formula (I). The present invention also relates to the use of the compounds (I), (II) or (III) as a medicament, and also the use thereof for the diagnosis, prevention and treatment of neurodegenerative diseases such as Wilson's disease and Alzheimer's disease.