Glucose-Responsive Hydrogel for Ocular Infection via ROS Generation
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Solution Overview
Problem
Current treatments for microbial keratitis, such as antibiotics, can lead to adverse effects like corneal opacification, allergy, and antimicrobial resistance, and existing diagnostic methods are time-consuming and insensitive, necessitating a safer and more effective alternative.
Innovation Solution
Development of a tear glucose-responsive and photoactive antimicrobial hydrogel composition incorporating graphene oxide and Copper ferrite nanoparticles, combined with glucose oxidase, which releases reactive oxygen species under near-infrared irradiation for synergistic photodynamic, chemodynamic, and photothermal therapy to treat ocular infections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antibiotics are used to treat microbial keratitis, then bacterial infections are eliminated, but adverse effects such as corneal opacification, allergy, and antimicrobial resistance occur
Solution Approach 1:
The patent changes the mechanism of action from conventional antibiotics to ROS-mediated photodynamic therapy. By using riboflavin as a photosensitizer activated by UV light, the treatment generates reactive oxygen species that kill bacteria through oxidative damage to cell membranes, proteins, and DNA, thereby eliminating antimicrobial resistance and reducing adverse effects while maintaining effectiveness
Solution Approach 2:
The patent employs a composite formulation combining riboflavin (photosensitizer), UV light source, and controlled delivery system. This composite approach integrates multiple functional components: riboflavin for ROS generation, UV irradiation for activation, and a delivery mechanism that ensures adequate concentration at the infection site while minimizing tissue damage
2Reliability
If riboflavin is used for photodynamic therapy, then ROS is generated to kill bacteria, but riboflavin penetrates into cornea and crosslinks collagen causing tissue damage
Solution Approach 1:
The patent applies local quality by concentrating the photodynamic effect specifically at the bacterial infection site rather than throughout the entire cornea. The treatment parameters (light intensity, exposure time, riboflavin concentration) are optimized to generate sufficient ROS locally to kill bacteria while limiting penetration depth and collateral damage to surrounding healthy tissue
Solution Approach 2:
The patent uses controlled excessive action by delivering a sufficient dose of ROS to ensure complete bacterial eradication, while using protective measures (such as corneal shields or controlled light delivery) to prevent excessive damage to host tissues. The treatment is calibrated to achieve the minimum effective dose needed for antimicrobial activity while staying below thresholds for significant collagen crosslinking
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 composition effectively kills pathogens, reduces bacterial virulence, and promotes wound healing without causing significant harm to corneal tissue, offering a safer alternative to antibiotics and addressing antimicrobial resistance.
Implementation Method 1
The photoactive heterojunction materials produce ROS and heat under NIR irradiation, thereby damaging the DNA and cell membrane of bacteria
Implementation Method 2
The photoactive heterojunction materials produce ROS and heat under NIR irradiation, thereby damaging the DNA and cell membrane of bacteria
Implementation Method 3
an enzyme capable of generating ROS upon contact with the eye
Implementation Method 4
an enzyme capable of generating ROS upon contact with the eye
Data Source
AI summary
Ocular antimicrobial compositions and methods and method of use thereof are provided. The compositions incorporate photoactive heterojunction materials can be incorporated into a suitable carrier, alone or in combination with an enzyme capable of generating ROS upon contact with the eye for the treatment of ocular conditions. The method includes contacting the eye of a subject in need thereof, the subject has or has been diagnosed with microbial keratitis, with an effective amount of the disclosed composition. The method further includes contacting the composition in the subject's eye with near infrared radiation (NIR).