Composite Hydrogel Sustained Release for Spinal Cord Injury
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Solution Overview
Problem
Current treatments for spinal cord injuries lack a standard clinical approach for managing secondary injuries, with existing delivery methods being inadequate for sustained and localized release of therapeutic agents due to rapid clearance and scarring issues, limiting the effectiveness of neuroprotective and neuroregenerative strategies.
Innovation Solution
A composite hydrogel comprising an aqueous solution of hyaluronan and methylcellulose with dispersed polymeric particles, which provides a stable and tunable sustained release profile for therapeutic agents, enhancing stability and allowing for prolonged delivery of therapeutic agents like FGF2, VEGF, and PDGF for promoting endothelial cell proliferation and blood vessel formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If therapeutic agents are delivered using current methods, then treatment can be provided, but the delivery is inadequate for sustained and localized release due to rapid clearance and scarring issues
Solution Approach 1:
The hydrogel is formulated to undergo sol-gel transition upon injection, forming a stable gel structure in situ before therapeutic agents are released. This preliminary structural preparation ensures sustained localized delivery by preventing rapid clearance and reducing scarring, allowing therapeutic agents to be released over an extended period (up to 50 days) at the target site.
2Stability of the object's composition
If a composite hydrogel with dispersed polymeric particles is used, then stability and sustained release are enhanced, but the device complexity increases
Solution Approach 1:
The invention employs a composite hydrogel system combining a hydrogel matrix with dispersed polymeric particles. The hydrogel provides structural stability and sustained release capability, while the polymeric particles serve as carriers for therapeutic agents. This composite approach enhances overall stability and enables tunable release profiles without requiring overly complex formulation procedures, as the components are integrated through straightforward dispersion and crosslinking processes.
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 composite achieves enhanced stability and sustained release of therapeutic agents for up to 50 days, improving the delivery of neuroprotective and neuroregenerative treatments by maintaining therapeutic efficacy while minimizing systemic toxicity and side effects.
Implementation Method 1
The stability of the hydrogel is enhanced relative to the stability of the hydrogel alone
Implementation Method 2
each therapeutic agent exhibits a linear sustained release rate that can be tuned or altered by selecting the appropriate polymer formulation of the micro particles and/or nanoparticles
Data Source
AI summary
The present invention relates to a composite hydrogel comprising a blend of an aqueous solution of an anionic polysaccharide or a derivative thereof, such as hyaluronan (also commonly referred to as hyaluronic acid) or a derivative thereof and an aqueous solution of methylcellulose or another water soluble cellulose derivative thereof, having dispersed polymeric particles, such as polymeric hydrophobic particles therein selected from micro particles and nanoparticles, and wherein the stability of the hydrogel is enhanced relative to the stability of the hydrogel alone. The polymeric particles may contain at least one therapeutic agent, in which case each therapeutic agent exhibits a linear sustained release rate that can be tuned or altered by selecting the appropriate polymer formulation of the micro particles and/or nanoparticles. The composite may be injectable, and in the absence of a therapeutic agent may be used as a bulking agent for reconstructive and cosmetic surgery or may act as a platform for subsequent delivery of therapeutic agents.