Permeation Enhancer Hydrogels for Trans-Tympanic Drug Delivery
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Solution Overview
Problem
Current treatments for otitis media, particularly in children, face challenges due to the impermeability of the tympanic membrane, leading to inadequate drug concentration at the infection site, systemic adverse effects, and the development of antibiotic resistance, necessitating a non-invasive and direct drug delivery method.
Innovation Solution
Compositions combining therapeutic agents with chemical permeation enhancers and matrix forming agents to create hydrogels that facilitate sustained drug flux across the tympanic membrane, enhancing drug delivery and reducing systemic exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If systemic oral antibiotics are used to treat otitis media, then the drug can reach the infection site, but the drug concentration at the site is insufficient and systemic adverse effects occur
Solution Approach 1:
The tympanic membrane serves as an intermediary barrier that is penetrated by chemical permeation enhancers to deliver antibiotics directly to the middle ear infection site, bypassing the need for systemic circulation and reducing adverse effects while increasing local drug concentration
Solution Approach 2:
The formulation delivers high concentrations of antibiotics locally to the middle ear through trans-tympanic penetration, while minimizing systemic exposure, creating a localized therapeutic effect with reduced harmful side effects
2Duration of action of moving object
If systemic oral antibiotics are used for multiple doses over 5-10 days, then the treatment course is completed, but patient compliance deteriorates due to gastrointestinal side effects
Solution Approach 1:
The patent replaces the mechanical/oral administration system with a topical ear drop formulation that delivers therapy directly to the infection site through the tympanic membrane, eliminating gastrointestinal side effects and improving compliance while maintaining effective treatment duration
Solution Approach 2:
The formulation is applied as ear drops that self-deliver the antibiotic through the tympanic membrane to the middle ear, requiring minimal patient intervention and avoiding the need for repeated oral dosing, thereby improving compliance
3Speed
If oral antibiotics are used for treatment, then the acute signs of infection subside within 72 hours, but the root cause of infection persists requiring continued compliance
Solution Approach 1:
The formulation penetrates the tympanic membrane to deliver antibiotics directly to the root cause of infection in the middle ear, addressing both the acute signs and the underlying infection simultaneously, thereby eliminating the need for prolonged compliance while maintaining rapid resolution
4Ease of operation
If the tympanic membrane is used as a delivery route, then direct treatment of middle ear infection is achieved, but the membrane's impermeability prevents adequate drug flux
Solution Approach 1:
Chemical permeation enhancers serve as intermediaries that facilitate the penetration of antibiotics through the impermeable tympanic membrane, enabling direct delivery to the middle ear while overcoming the membrane's barrier properties
Solution Approach 2:
The formulation modifies the physical-chemical parameters of the tympanic membrane through chemical permeation enhancers, temporarily increasing its permeability to allow adequate drug flux while maintaining the membrane's structural integrity and protective function
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 achieves higher drug concentrations locally in the middle ear, minimizing systemic side effects and potentially reducing antibiotic resistance, while providing effective treatment for otitis media with improved patient compliance.
Implementation Method 1
Chemical permeation enhancers (CPEs), commonly employed for trans-dermal delivery, can enable such a trans-tympanic flux
Implementation Method 2
the composition forms a gel at temperatures above a phase transition temperature; the phase transition temperature is less than about 37° C.
Data Source
AI summary
The present invention provides compositions and methods for delivery of therapeutic agents across an barrier. The compositions include a therapeutic agent (e.g., antimicrobial agent, antibiotic, or anesthetic agent), a permeation enhancer which increases the flux of the therapeutic agent across the barrier, and a matrix forming agent. The matrix forming agent forms a gel at a suitable gelation temperature and rheological properties for use in drug delivery, and in some cases, the gelation temperature and rheological properties are not significantly changed from those of the composition without the permeation enhancer. The invention also provides a matrix forming agent and compositions thereof. Such compositions are particularly useful in the treatment of otitis media. Methods of treatment, methods of delivery, and kits for the compositions described herein are also provided.