Upconverting Nanoparticle Biosensor for Glycated Hemoglobin Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for measuring glycated hemoglobin, such as high performance liquid chromatography (HPLC), are technologically complex, expensive, and prone to matrix effects, while biosensors using UV or visible light can damage biomolecules and produce non-specific signals.
Innovation Solution
A diagnostic platform utilizing upconverting nanoparticles excited by near-infrared light and luminescence resonance energy transfer, combined with a specific receptor for glycated hemoglobin, allowing for quantitative detection of glycated hemoglobin through quenched luminescence signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high performance liquid chromatography (HPLC) is used to measure glycated hemoglobin, then measurement accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces the complex mechanical HPLC system with a luminescence-based detection system using upconverting nanoparticles. The HPLC system with its columns, pumps, and detectors is substituted by a simpler optical detection method where UCNPs convert near-infrared light to visible light, enabling direct measurement without mechanical separation apparatus.
Solution Approach 2:
The patent changes the detection parameter from chromatographic separation to luminescence intensity measurement. By measuring the luminescence signal from UCNPs that binds to glycated hemoglobin, the system achieves accurate quantification through optical parameter changes rather than mechanical separation, simplifying the overall device architecture.
2Measurement precision
If HPLC is used for glycated hemoglobin measurement, then standardized measurement is achieved, but reaction time increases
Solution Approach 1:
The patent extracts the essential measurement function from the time-consuming HPLC process. By using UCNPs that directly bind to glycated hemoglobin and produce luminescence signals, the system eliminates the lengthy chromatographic separation steps while retaining the ability to accurately quantify glycated hemoglobin levels.
3Ease of operation
If UV or visible light is used to excite fluorescent materials for biosensing, then glycated hemoglobin can be measured in homogeneous state, but biomolecules are damaged
Solution Approach 1:
The patent changes the excitation wavelength parameter from UV or visible light to near-infrared light. This parameter change allows the UCNPs to be excited without damaging the glycated hemoglobin biomolecules, as near-infrared light has lower energy and does not cause the same photodamage effects as higher energy UV or visible light.
Solution Approach 2:
The patent introduces upconverting nanoparticles as an intermediary between the near-infrared light source and the glycated hemoglobin detection. The UCNPs absorb the harmless near-infrared light and convert it to visible light that can excite the fluorescent marker, indirectly enabling detection without direct exposure of biomolecules to damaging UV or visible light.
4Measurement precision
If fluorescent organic materials or quantum dots are used in biosensors, then glycated hemoglobin measurement is enabled, but non-specific signals are induced
Solution Approach 1:
The patent uses upconverting nanoparticles as an intermediary layer between the near-infrared excitation source and the fluorescent detection system. This intermediary approach allows the system to maintain the benefits of fluorescent detection while avoiding the non-specific signals, as the UCNPs provide a clean optical conversion pathway that reduces background interference.
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
This approach enables efficient, homogeneous measurement of glycated hemoglobin in blood samples without damaging biomolecules and reduces non-specific signals, providing a cost-effective and technologically simpler method for diabetes diagnosis.
Implementation Method 1
upconverting nanoparticles excited by near-infrared (NIR) light wherein glycated hemoglobin (HbA1c) is an indicator for diabetes in the blood, a diagnostic kit including the same, and a method for preparing the same.
Implementation Method 2
upconverting nanoparticles frequently used in the art can resolve such problems using near-infrared light for excitation
Implementation Method 3
Energy transferred from the upconverting nanoparticles-antibody complex to glycated hemoglobin increases with increasing concentration of glycated hemoglobin. Accordingly, the quenched luminescence signals from the upconverting nanoparticles-antibody complex can be quantitatively measured.
Data Source
AI summary
Disclosed is a platform detecting glycated hemoglobin as an indicator for diabetes in the blood based on upconverting nanoparticles excited by near-infrared light and luminescence resonance energy transfer.