Keratin Microneedle Patch for Sustained Exosome Delivery
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Solution Overview
Problem
Current hair loss treatments, such as drug therapy and surgical options, offer only short-term benefits and are associated with adverse side effects or invasive procedures, lacking effective, sustained, and painless solutions for promoting hair growth.
Innovation Solution
A composition comprising a hydrophilic polymer network, including keratin or its derivatives, combined with natural products like mesenchymal stem cell-derived exosomes and small molecule hair growth agents, encapsulated in biodegradable nanoparticles, delivered through microneedle arrays or skin patches for sustained release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional drug therapy (minoxidil or finasteride) is used for hair loss treatment, then hair growth is promoted temporarily, but the treatment requires continued use and causes adverse side effects
Solution Approach 1:
The treatment is segmented into multiple components delivered through microneedle arrays: natural products (exosomes, stem cells), their derivatives, and small molecule hair growth agents. Each component is encapsulated separately in biodegradable nanoparticles or hydrogel matrices, allowing controlled, sustained release to different depths of the skin and hair follicle structures, thereby maintaining effectiveness while reducing the need for continuous high-dose administration that causes side effects
Solution Approach 2:
Microneedle arrays serve as an intermediary delivery system that bridges the gap between topical application and systemic injection. The microneedles penetrate the stratum corneum barrier and deliver therapeutic agents directly to the hair follicle bulge region, achieving localized high concentration of active ingredients without requiring systemic circulation, thus eliminating many systemic side effects while maintaining local efficacy
2Reliability
If autologous hair transplantation is performed, then reliable hair growth is achieved, but the procedure is invasive and limited to cases with abundant donor follicles
Solution Approach 1:
The treatment utilizes the body's own regenerative capabilities by delivering stem cells and exosomes that activate endogenous hair follicle stem cells in the bulge region. This self-service approach stimulates the body's natural hair regeneration processes without requiring external donor follicles or invasive surgical transplantation, achieving permanent hair growth through biological activation rather than physical relocation of follicles
Solution Approach 2:
The invention changes the therapeutic parameter from mechanical follicle relocation (transplantation) to biochemical follicle activation (stem cell therapy). By delivering growth factors, exosomes, and small molecule agents directly to hair follicle stem cells, the treatment transforms dormant or miniaturized follicles into active growth units, achieving permanent hair growth through parameter change in follicle activity state rather than through invasive surgical intervention
3Duration of action of moving object
If sustained delivery of therapeutic agents is implemented, then treatment duration is extended and side effects are reduced, but the delivery system complexity increases
Solution Approach 1:
Therapeutic agents are pre-encapsulated in biodegradable nanoparticles or incorporated into hydrogel matrices during microneedle fabrication. This preliminary action ensures that the agents are protected, stabilized, and positioned for controlled release over extended periods. The microneedle arrays themselves serve as pre-formed delivery vehicles that dissolve or degrade in situ, eliminating the need for complex external delivery devices while achieving sustained release
Solution Approach 2:
The microneedle arrays are designed as disposable, single-use devices made from biodegradable materials. Each application uses a new array that dissolves or is expelled after delivering its payload, eliminating the need for complex reusable delivery systems with multiple components. The simplicity of the disposable design reduces overall system complexity while enabling sustained delivery through the gradual degradation and release from the biodegradable matrix
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 provides a non-invasive, painless, and sustained delivery of therapeutic agents, promoting hair growth by activating hair follicle stem cells, leading to increased hair density, thickness, and prolonged hair growth cycles with minimal side effects.
Implementation Method 1
contacting the skin surface of the subject with the microneedle array
Implementation Method 2
The keratin hydrogel may be crosslinked via intermolecular disulfide bonds
Implementation Method 3
comprising a keratin hydrogel or a polymeric network comprising keratin
Data Source
AI summary
Compositions comprising polymeric networks comprising combinations of small molecule hair growth agents and natural products (e.g., vesicles, such as stem cell-derived exosomes) are described. The polymeric network can, for example, comprise keratin crosslinked via intermolecular disulfide bonds. Alternatively, the polymeric network can comprise keratin or a derivative thereof and another crosslinked hydrophilic polymer. Microneedles, microneedle arrays, and skin patches comprising the compositions are also described, as are methods of treating hair loss and/or promoting hair growth using the microneedles, microneedle arrays and/or skin patches.