Permselective Core-Shell Particles for Potassium Removal
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Solution Overview
Problem
Current treatments for hyperkalemia are limited by the need for large doses of exchange resins with severe side effects, diuretic resistance, and unsuitability for outpatient or chronic use, particularly in patients with kidney disease or heart conditions, and existing core-shell particles lack selective binding and retention of monovalent cations like potassium over divalent cations.
Innovation Solution
Development of permselective core-shell particles with a polymer shell that preferentially binds potassium over magnesium and sodium, allowing for prolonged transit through the gastrointestinal tract and effective removal of potassium ions, while being non-degradable and non-toxic, and suitable for use with medications that cause potassium retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If exchange resins such as Kayexalate are used to treat hyperkalemia, then potassium removal is achieved, but severe GI side effects and significant sodium introduction occur
Solution Approach 1:
The invention applies local quality by creating core-shell particles with differentiated functional zones: the core provides cation exchange capacity for potassium binding, while the shell provides selective permeability to monovalent cations. This spatial differentiation allows the particle to remove potassium while excluding divalent cations like magnesium and calcium, thereby reducing harmful side effects.
Solution Approach 2:
The invention uses composite materials by combining a cation exchange resin core with a permselective polymer shell. This composite structure integrates the potassium-binding capability of the core with the selective permeability of the shell, enabling targeted potassium removal while minimizing introduction of harmful substances like sodium.
2Productivity
If large doses of exchange resins are administered, then potassium removal efficacy is improved, but patient compliance decreases due to severe side effects
Solution Approach 1:
The invention changes the selectivity parameter of the resin by adding a permselective shell that differentiates between monovalent and divalent cations. This parameter change allows effective potassium removal at lower doses, improving patient compliance by reducing side effects while maintaining therapeutic efficacy.
3Quantity of substance
If conventional resins are used, then potassium binding occurs, but selective binding over divalent cations like magnesium and calcium is insufficient
Solution Approach 1:
The shell provides local quality by creating a permselective barrier that specifically allows monovalent cations to reach the core while blocking divalent cations. This spatial differentiation enables selective potassium binding without significant magnesium or calcium interference.
Solution Approach 2:
The composite structure of core-shell particles combines the high cation exchange capacity of the core with the selective permeability of the shell, achieving both high potassium binding and high selectivity against divalent cations.
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 core-shell particles effectively and selectively remove potassium ions from the gastrointestinal tract, providing a therapeutically effective amount over an extended period, reducing the risk of off-target effects and improving treatment options for hyperkalemia and related ion balance disorders.
Implementation Method 1
the shell component being a permselective polymer for binding potassium ion over magnesium ion
Data Source
AI summary
The present invention provides methods and compositions for the treatment of ion imbalances using core-shell composites and compositions comprising such core-shell composites. In particular, the invention provides core-shell particles and compositions comprising potassium binding polymers, and core-shell particles and compositions comprising sodium binding polymers, and in each case, pharmaceutical compositions thereof. Methods of use of the polymeric and pharmaceutical compositions for therapeutic and/or prophylactic benefits are also disclosed. The compositions and methods of the invention offer improved approaches for treatment of hyperkalemia and other indications related to potassium ion homeostasis, and for treatment of hypertension and other indicates related to sodium ion homeostasis.