Implantable Analyte Sensor Additives for Boronate Oxidation Protection
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Solution Overview
Problem
Implanted analyte sensors face degradation due to the immune system's attack, particularly from reactive oxygen species like hydrogen peroxide, which oxidize boronate groups in indicator molecules, reducing sensor longevity.
Innovation Solution
Incorporating additives such as boronate or boronic acid moieties within the analyte indicator or a polymer graft, which can be co-monomers with the analyte indicator, to interact with degradative species and reduce degradation without compromising signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor is implanted in the body of a living animal, then the sensor can measure analytes in vivo, but the immune system attacks the sensor and degrades the indicator molecules through reactive oxygen species
Solution Approach 1:
The patent introduces an intermediary substance (additive) that mediates between the harmful reactive oxygen species and the indicator molecule. The additive acts as a sacrificial component that reacts with degradative species first, protecting the indicator molecule from oxidation while allowing the sensor to continue functioning.
Solution Approach 2:
The patent converts the harmful effect of reactive oxygen species into a beneficial protective mechanism. By incorporating additives that preferentially react with these species, the harmful oxidative environment is transformed into a controlled reaction that spares the indicator molecule, effectively using the hostile immune environment to trigger protective chemistry.
2Measurement precision
If indicator molecules are used to measure analytes, then analyte binding and signal generation occur, but the indicator molecules undergo oxidation and chemical degradation reducing sensor longevity
Solution Approach 1:
The patent applies beforehand cushioning by pre-incorporating protective additives into the sensor structure before implantation. These additives are positioned in advance to intercept and neutralize degradative species before they can reach and damage the indicator molecules, providing a buffer against future degradation.
Solution Approach 2:
The patent changes the chemical composition parameters of the sensor by incorporating specific additives with known reactive properties. This modification alters the overall chemical stability parameters of the sensor system, making it more resistant to oxidative degradation while preserving the indicator's analytical function.
3Adaptability or versatility
If boronate groups are present in indicator molecules for analyte binding, then glucose binding capability is achieved, but boronate groups are specifically oxidized by hydrogen peroxide disabling glucose binding
Solution Approach 1:
The additive serves as an intermediary that specifically protects the boronate groups from oxidation. It creates a protective chemical environment around the boronate-containing indicator molecules, allowing them to maintain their glucose-binding capability without undergoing oxidative degradation that would disable this function.
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 additives effectively sequester degradative species, enhancing sensor longevity and maintaining signal performance by preventing oxidation and chemical degradation of indicator molecules.
Implementation Method 1
hydrogen peroxide may degrade the indicator molecules by oxidizing the boronate group
Implementation Method 2
reactive oxygen species like hydrogen peroxide, which oxidize boronate groups in indicator molecules, reducing sensor longevity
Data Source
AI summary
A sensor (e.g., an optical sensor) that may be implanted within a living animal (e.g., a human) and may be used to measure an analyte (e.g., glucose or oxygen) in a medium (e.g., interstitial fluid, blood, or intraperitoneal fluid) within the animal. The sensor may include a sensor housing, an analyte indicator covering at least a portion of the sensor housing, and one or more compounds containing boronate or boronic acid moieties that reduce degradation of the analyte indicator.