Nanozyme Hybrid Hydrogel Eye Drops for Drug-Resistant Keratitis
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Solution Overview
Problem
The increasing drug resistance of bacterial pathogens causing keratitis to common ocular antibiotics necessitates the development of novel antibacterial drugs for effective treatment, particularly for severe infections like those induced by Pseudomonas aeruginosa.
Innovation Solution
A nanozyme composite-based hybrid hydrogel eye drop is prepared by synthesizing tannin-coordinated silver/cobalt composite nanoparticles and combining them with acrylate-modified gelatin, followed by ultraviolet irradiation and mixing with hydrogen peroxide, to create a broad-spectrum bactericidal agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common ocular antibiotics are used to treat bacterial keratitis, then the treatment is effective for susceptible bacteria, but the drug resistance of pathogens tends to increase
Solution Approach 1:
The patent changes the chemical composition parameters by replacing traditional antibiotics with a nanozyme composite system containing silver/cobalt nanoparticles coordinated with tannin. This fundamental parameter change in the active ingredient creates a novel mechanism of action that bypasses existing antibiotic resistance patterns while maintaining bactericidal effectiveness
Solution Approach 2:
The patent employs a composite material system consisting of silver/cobalt nanoparticles coordinated with tannin, encapsulated in a hydrogel matrix. This composite structure combines the antimicrobial properties of metal nanoparticles with the biocompatibility and sustained release capabilities of the hydrogel, creating a multifunctional treatment that addresses both effectiveness and resistance issues
2Reliability
If antibiotics are frequently used to control corneal ulcers, then the development of ulcers is controlled, but adverse events such as ocular discomfort and chemical conjunctivitis occur
Solution Approach 1:
The patent introduces a hydrogel matrix as an intermediary carrier that encapsulates the nanozyme composite. This hydrogel intermediary provides controlled release of the active ingredient, reducing peak concentrations that cause irritation while maintaining therapeutic levels. The hydrogel itself also provides soothing effects and reduces direct contact irritation between the nanoparticle suspension and ocular tissues
Solution Approach 2:
The patent changes the delivery parameters by transitioning from direct antibiotic application to hydrogel-encapsulated nanozyme delivery. This parameter change in the delivery system allows for sustained release at lower concentrations, reducing the frequency and severity of adverse events while maintaining therapeutic effectiveness
3Ease of operation
If traditional eye drop formulations are used, then the administration is simple, but the drug resistance and adverse events cannot be effectively addressed
Solution Approach 1:
The patent creates a multi-functional eye drop formulation where the hydrogel matrix serves multiple purposes: it acts as a sustained release carrier, a soothing agent for ocular surfaces, and a stabilizing matrix for the nanozyme composite. The silver/cobalt-tannin nanozyme composite provides broad-spectrum antimicrobial activity against both susceptible and resistant bacteria. This multi-functionality allows the simple eye drop administration route to deliver complex therapeutic benefits
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 eye drop demonstrates a broad-spectrum bactericidal effect against various bacteria and fungi, providing prominent preventive and therapeutic benefits for bacterial and drug-resistant corneal infections, including those caused by Pseudomonas aeruginosa, with reduced adverse events.
Implementation Method 1
synthesizing a tannin-coordinated silver/cobalt composite nanoparticle (TCN) through a coordination reaction of cobalt chloride hexahydrate with ammonia water
Implementation Method 2
an oxidation-reduction reaction of silver nitrate with tannin
Implementation Method 3
conducting an ultrasonic treatment to obtain a homogeneous mixture
Implementation Method 4
irradiating the homogeneous mixture under ultraviolet (UV) light to obtain a nanozyme composite-based hybrid hydrogel material
Data Source
AI summary
A preparation method of a nanozyme composite-based hybrid hydrogel eye drop includes synthesizing a tannin-coordinated silver/cobalt composite nanoparticle through a coordination reaction of cobalt chloride hexahydrate with ammonia water and an oxidation-reduction reaction of silver nitrate with tannin; and mixing the silver/cobalt composite nanoparticle with an acrylate-modified gelatin, conducting an ultrasonic treatment to allow complete dissolution, and irradiating a resulting mixture under ultraviolet (UV) light to obtain the nanozyme composite-based hybrid hydrogel eye drop. The preparation method of the present disclosure has simple operations and a short preparation time. The eye drop prepared by the preparation method shows a broad-spectrum bactericidal effect against a variety of bacteria and fungi, and has prominent preventive and therapeutic effects for bacterial and drug-resistant bacterial corneal infections.