Deuterated Polyunsaturated Fatty Acids for Retinal Oxidative Damage
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Solution Overview
Problem
Current antioxidant therapies for oxidative retinal diseases such as Wet and Dry Age-related Macular Degeneration, Retinitis Pigmentosa, Diabetic Retinopathy, Cataracts, and Stargardt Disease are limited in effectiveness due to the stochastic nature of ROS-inflicted damage and the stability of PUFA peroxidation products, which are not adequately addressed by existing treatments.
Innovation Solution
Administration of isotopically modified polyunsaturated fatty acids or their mimetics, where one or more bonds are stabilized against oxidation, incorporating isotopes such as deuterium at bis-allylic positions to prevent autooxidation and mitigate oxidative stress, potentially combined with antioxidants like Coenzyme Q or idebenone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antioxidants are administered to treat oxidative retinal diseases, then some protective effect is achieved, but the treatment is limited in effectiveness due to the stochastic nature of ROS damage and the stability of PUFA peroxidation products
Solution Approach 1:
The patent applies parameter changes by substituting hydrogen atoms with deuterium isotopes at specific positions (bis-allylic and allylic positions) of polyunsaturated fatty acids. This isotopic substitution changes the physical and chemical parameters of the PUFA molecules, specifically increasing the activation energy for hydrogen abstraction reactions. The deuterated PUFAs resist oxidation more effectively while maintaining their essential biological functions, thereby improving the reliability of treatment for oxidative retinal diseases.
Solution Approach 2:
The patent converts the harmful oxidative properties of PUFAs into a beneficial protective effect through deuterium substitution. The same PUFA molecules that are prone to oxidation and cause damage when conventional are replaced with deuterated versions that resist oxidation. The deuterium atoms protect against ROS-mediated damage while the PUFAs continue to perform their essential membrane and signaling functions, effectively turning a harmful substance into a protective agent.
2Stability of the object's composition
If polyunsaturated fatty acids are administered to maintain membrane fluidity and function, then essential biological functions are supported, but they become susceptible to oxidation by ROS causing cellular damage
Solution Approach 1:
The patent changes the isotopic parameter of PUFAs by replacing hydrogen with deuterium at oxidation-prone positions. This parameter change increases the C-D bond strength compared to C-H bonds, raising the activation energy for lipid peroxidation reactions. The deuterated PUFAs maintain the necessary membrane fluidity and biological functions while generating significantly fewer peroxidation products, thus resolving the contradiction between maintaining function and preventing damage.
3Quantity of substance
If standard PUFAs are used in the diet, then essential nutrient requirements are met, but oxidative stress is amplified through chain reactions
Solution Approach 1:
The patent converts the oxidizable nature of dietary PUFAs into a protective antioxidant effect. Deuterated PUFAs resist initiation of lipid peroxidation chain reactions and can terminate existing chains by donating deuterium atoms to free radicals. By incorporating deuterated PUFAs into the diet, the same essential nutrient serves dual purposes: meeting nutritional requirements while simultaneously reducing oxidative stress and preventing the formation of harmful lipid hydroperoxides.
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 stabilization of polyunsaturated fatty acids at oxidation-prone sites reduces oxidative damage, providing a more effective approach to treating oxidative retinal diseases by preventing autooxidation chains and enhancing the body's antioxidant defenses.
Implementation Method 1
Administration of isotopically modified polyunsaturated fatty acids or their mimetics, where one or more bonds are stabilized against oxidation, incorporating isotopes such as deuterium at bis-allylic positions to prevent autooxidation
Implementation Method 2
The stabilization of polyunsaturated fatty acids at oxidation-prone sites reduces oxidative damage, providing a more effective approach to treating oxidative retinal diseases by preventing autooxidation chains
Data Source
AI summary
Some aspects of the invention provide for a method of treating Wet and/or Dry Age-related Macular Degeneration, Retinitis Pigmentosa, Diabetic Retinopathy, cataracts, and/or Stargardt Disease using polyunsaturated fatty acids which are modified in certain positions to attenuate oxidative damage by Reactive Oxygen Species (ROS) and/or suppress the rate of formation of reactive products and toxic compounds.