Iodide-Catalyzed Hydrogen Peroxide Decomposition in Corneal Cross-Linking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current collagen cross-linking treatments for ophthalmic disorders often result in post-operative corneal haze due to hydrogen peroxide and reactive oxygen species, which can lead to prolonged vision deterioration and increased need for corrective lenses.
Innovation Solution
A pharmaceutical composition comprising 0.015% sodium iodine, 0.5% riboflavin, and a pharmaceutically acceptable excipient at a basic pH, which catalytically breaks down hydrogen peroxide into water and oxygen, reducing oxidative stress and minimizing corneal haze during photochemical cross-linking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If collagen cross-linking treatment is performed using conventional compositions, then corneal strength is improved, but post-operative corneal haze occurs due to hydrogen peroxide and reactive oxygen species
Solution Approach 1:
The patent converts the harmful effect of hydrogen peroxide into a beneficial one by using it as an oxidizing agent to generate riboflavin radicals that facilitate collagen cross-linking. Simultaneously, the iodide catalyst accelerates the decomposition of excess hydrogen peroxide into water and oxygen, eliminating the harmful reactive oxygen species that cause corneal haze. This dual approach transforms the harmful oxidative stress into a useful cross-linking mechanism while preventing adverse effects.
Solution Approach 2:
Iodide ions serve as a catalytic intermediary in the composition. They facilitate the decomposition of hydrogen peroxide into water and oxygen, acting as a mediator that speeds up the removal of harmful reactive oxygen species without being consumed in the reaction. This intermediary mechanism allows the treatment to maintain corneal strength improvement while preventing corneal haze formation.
2Strength
If higher concentrations of riboflavin are used to enhance cross-linking, then corneal strength increases, but oxidative stress and corneal haze worsen
Solution Approach 1:
The patent changes the chemical environment parameters by introducing iodide ions and adjusting to a basic pH condition. These parameter changes enable the iodide-catalyzed decomposition of hydrogen peroxide, which reduces oxidative stress even when higher riboflavin concentrations are used. The basic pH also enhances the catalytic activity of iodide and stabilizes the riboflavin-iodide interaction, allowing effective cross-linking with reduced harmful effects.
Solution Approach 2:
The composition converts the potentially harmful high concentration of riboflavin-induced oxidative stress into a beneficial process by using iodide-catalyzed hydrogen peroxide decomposition to selectively eliminate excess reactive oxygen species while maintaining the cross-linking benefit.
3Device complexity
If photochemical cross-linking is performed without iodide catalyst, then treatment simplicity is maintained, but hydrogen peroxide accumulation causes vision deterioration
Solution Approach 1:
Iodide ions are introduced as a simple catalytic intermediary that dramatically accelerates hydrogen peroxide decomposition. The iodide catalyst requires no complex equipment or additional treatment steps, maintaining treatment simplicity while reliably preventing hydrogen peroxide accumulation and its associated vision deterioration risks.
Solution Approach 2:
The addition of iodide catalyst changes the kinetic parameters of hydrogen peroxide decomposition, transforming it from a slow, problematic process into a rapid, controlled reaction. This parameter change enhances treatment reliability without significantly complicating the procedure, as iodide salts are easily incorporated into the existing composition.
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 composition significantly reduces post-operative corneal haze and enhances unaided vision, potentially reducing the need for corrective lenses and corneal transplantation by effectively managing oxidative stress during collagen cross-linking.
Implementation Method 1
a basic pH that permits iodide ion to catalytically break hydrogen peroxide into water and oxygen
Implementation Method 2
iodide ion to catalytically break hydrogen peroxide into water and oxygen
Implementation Method 3
photochemical crosslinking of corneal collagen
Data Source
AI summary
Methods and compositions for treating various indications by lessening oxidative stress in a patient are provided. A pharmaceutical composition comprises between about 0.001% to about 10.0%), or more specifically between about 0.015% to about 5%, sodium iodine or catalase by weight. The iodine ion or the catalase dissociates hydrogen peroxide into water and molecular oxygen to interrupt biological events that result in negative side effects. The pharmaceutical composition further comprises in some cases a reducing agent or various carrier materials. The pharmaceutical composition is in some cases formulated for a variety of delivery methods.