Cross-Linked Insulin Conjugates for Glucose-Responsive Delivery
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Solution Overview
Problem
Existing glucose-responsive insulin delivery systems face challenges in releasing insulin in proportion to varying blood glucose concentrations, with existing glycosylated polymer-insulin conjugates experiencing enzymatic degradation and production complexities.
Innovation Solution
Development of cross-linked materials with low molecular weight non-polymeric frameworks and high-affinity ligands that form insoluble cross-linked structures, allowing controlled release of insulin in response to glucose concentrations without enzymatic degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If glycosylated polymer-insulin conjugates are used in glucose-responsive delivery systems, then the system can respond to glucose concentrations, but the conjugates suffer from enzymatic degradation and production complexities
Solution Approach 1:
The patent changes the molecular weight parameter of the framework from high (polymeric) to low (non-polymeric, <10,000 Da), which fundamentally alters the conjugate's resistance to enzymatic degradation while preserving glucose-responsive release capability through the affinity ligand framework
Solution Approach 2:
The patent creates a composite structure combining a non-polymeric framework with multiple affinity ligands and insulin, forming a cross-linked material that integrates the stability of low molecular weight compounds with the functional versatility of multivalent conjugates
2Adaptability or versatility
If glycosylated polymer-insulin conjugates are used, then glucose-responsive release is achieved, but production complexities increase
Solution Approach 1:
By changing the framework molecular weight to below 10,000 Da and using non-polymeric structures with defined chemistry, the patent simplifies production and characterization while maintaining glucose-responsive functionality through the affinity ligand framework
Solution Approach 2:
The patent segments the conjugate into distinct functional modules (framework, affinity ligands, insulin) that can be independently characterized and assembled, simplifying manufacturing and quality control while enabling glucose-responsive release
3Reliability
If low molecular weight non-polymeric frameworks are used, then enzymatic degradation is avoided, but the challenge is to maintain sufficient affinity for glucose binding
Solution Approach 1:
The patent merges multiple affinity ligands onto a single non-polymeric framework, creating a multivalent structure that enhances glucose binding affinity through cooperative effects while maintaining the stability advantages of low molecular weight construction
Solution Approach 2:
The patent creates a composite affinity ligand-framework structure that combines the stability of low molecular weight non-polymeric frameworks with the enhanced binding capability of multivalent ligand arrays, achieving both reliability and adaptability
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 solution enables bioactive insulin release in proportion to glucose levels, overcoming enzymatic degradation and production challenges, with stable and controlled pharmacokinetic and pharmacodynamic properties.
Implementation Method 1
The non-covalent bonds between the multivalent cross-linking agents and the affinity ligands are competitively dissociated in the presence of excess amounts of a target molecule
Data Source
AI summary
The present disclosure provides a cross-linked material comprising conjugates which include two or more separate affinity ligands bound to a non-polymeric framework, wherein the molecular weight of the non-polymeric framework is less than 10,000 Da; and multivalent cross-linking agents that non-covalently bind the affinity ligands of the conjugates and thereby cross-link the conjugates to form a cross-linked material, wherein the non-covalent bonds between the multivalent cross-linking agents and the affinity ligands are competitively dissociated in the presence of excess amounts of a target molecule. The present disclosure also provides methods of making and methods of using these materials. In other aspects, the present disclosure provides exemplary conjugates including conjugates for use in glucose responsive cross-linked materials.