Tympanic Membrane Permeation via Penetration Enhancers
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Solution Overview
Problem
Current treatments for middle ear infections, such as otitis media, face challenges including antibiotic resistance, poor drug concentration at the infection site, gastrointestinal side effects, and the tympanic membrane's barrier to drug delivery, leading to recurrence and complications.
Innovation Solution
A noninvasive drug delivery system using pharmaceutical compositions that include penetration enhancers like surfactants and terpenes, combined with therapeutic agents like antibiotics, to facilitate sustained release across the tympanic membrane, utilizing matrix-forming agents like polyelectrolyte complexes and thermo-responsive polymers to enhance drug delivery to the middle and inner ear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If systemic oral antibiotics are used to treat middle ear infections, then the therapeutic agent can reach the infection site, but the drug concentration at the site is insufficient and gastrointestinal side effects occur
Solution Approach 1:
The tympanic membrane serves as an intermediary structure that, when permeabilized by penetration enhancers, allows direct delivery of antibiotics from the ear canal into the middle ear space, bypassing the gastrointestinal tract and achieving high local drug concentrations
Solution Approach 2:
The invention extracts the therapeutic agent directly to the site of infection through the permeabilized tympanic membrane, eliminating the need for systemic distribution and thereby preventing gastrointestinal side effects while maximizing local drug concentration
2Reliability
If the tympanic membrane is used as a barrier to direct treatment, then the middle ear is protected, but drug delivery to the middle and inner ear is blocked
Solution Approach 1:
The invention temporarily changes the physical-chemical parameters of the tympanic membrane by applying penetration enhancers (surfactants, terpenes) that alter membrane permeability, allowing drug passage while maintaining structural integrity and protective function
Solution Approach 2:
Penetration enhancers act as intermediaries that facilitate drug transport across the tympanic membrane without compromising its protective barrier function, enabling controlled permeabilization for therapeutic purposes
3Reliability
If multiple doses of antibiotics are administered over 5-10 days, then the infection is treated, but patient compliance decreases due to side effects and treatment duration
Solution Approach 1:
The invention provides continuous drug delivery to the middle ear through sustained-release formulations and penetration enhancers that maintain therapeutic drug concentrations over time, eliminating the need for multiple discrete dosing events and improving patient compliance
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 system achieves effective and sustained delivery of therapeutic agents to the middle ear, reducing recurrence and complications, while minimizing side effects and overcoming the tympanic membrane's barrier, thereby improving treatment efficacy and patient compliance.
Implementation Method 1
The penetration enhancer is an agent that alters the stratum corneum of the tympanic membrane to allow for increased flux of the therapeutic agent across the tympanic membrane
Implementation Method 2
a sustained release drug delivery agent is a material, such as, for example, a polyelectrolyte or thermo-responsive polymer, that undergoes a viscosity increase after being administered to a subject
Implementation Method 3
a polyelectrolyte or thermo-responsive polymer, that undergoes a viscosity increase after being administered to a subject
Data Source
AI summary
The present invention provides compositions and methods for noninvasive delivery of therapeutic agents across an intact tympanic membrane. For example, the compositions include a penetration enhancer which increases the flux of a therapeutic agent (e.g., antibiotic) across the tympanic membrane. Such compositions are particularly useful in the treatment of otitis media. Additionally, the composition may include a sustained release agents that, in some embodiments form sustained release reservoirs, in situ, once administered to a patient.