Clickable Polysaccharide Hydrogel Capsules to Mitigate Foreign Body Response
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Solution Overview
Problem
Existing implanted devices face challenges in modulating the biological immune response, leading to foreign body response (FBR) that affects their fidelity and function.
Innovation Solution
Polysaccharide polymers with clickable crosslinking moieties are covalently crosslinked to form hydrogel capsules, allowing for tuning properties such as capsule diameter, stability, and integrity, and incorporating afibrotic compounds to mitigate FBR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polysaccharide polymers are crosslinked to form hydrogel capsules, then capsule stability and integrity are improved, but device complexity increases
Solution Approach 1:
The patent utilizes clickable crosslinking moieties that undergo chemical transformation upon exposure to specific conditions (e.g., copper catalyst for azide-alkyne cycloaddiction). This parameter change approach allows the polysaccharide polymers to transition from linear to crosslinked structures, forming stable hydrogel capsules with controlled integrity while maintaining a relatively simple base polymer structure.
Solution Approach 2:
The invention creates composite hydrogel capsule structures by combining polysaccharide polymers with crosslinking moieties. The resulting material integrates the biocompatibility and degradability of polysaccharides with the structural stability of crosslinked networks, achieving enhanced capsule reliability without requiring entirely new material systems.
2Object-affected harmful factors
If afibrotic compounds are incorporated into hydrogel capsules, then foreign body response is reduced, but manufacturing complexity increases
Solution Approach 1:
The afibrotic compounds are pre-incorporated into the polysaccharide polymer structure or the hydrogel capsule matrix during the fabrication process. This preliminary action ensures that the anti-fibrotic agents are already positioned at the implant site before device insertion, providing immediate protection against foreign body response without requiring post-manufacturing assembly steps.
Solution Approach 2:
The patent combines multiple functions into a single integrated structure: the polysaccharide polymer provides structural framework, the crosslinking moieties provide stability, and the afibrotic compounds provide immunomodulation. This merging of functions into one composite device reduces the number of separate manufacturing steps compared to assembling multiple separate components.
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 hydrogel capsules effectively reduce FBR by at least 80% to 100%, enhancing the viability and therapeutic function of encapsulated cells.
Implementation Method 1
covalently crosslinked to another moiety, such as another polysaccharide polymer
Data Source
AI summary
Described herein are hydrogel capsules (e.g., alginate hydrogel capsules) comprising polysaccharide polymers capable of covalent crosslinking to another moiety, such as another polysaccharide polymer, as well as related compositions and uses thereof.