D8 and D10 Metal Complexes for Amyloid Imaging
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Solution Overview
Problem
Current methods for detecting amyloid fibrillation and plaque formation, as well as nucleolus imaging, face challenges such as limited sensitivity, interference from autofluorescence, and high costs, making early diagnosis of neurodegenerative diseases and cancers difficult.
Innovation Solution
Development of d8 or d10 metal complexes that bind to amyloid, plaque, or RNA through noncovalent interactions, inducing aggregation and supramolecular self-assembly, which changes their photophysical properties, allowing for sensitive detection and imaging in the red to near-infrared region with reduced autofluorescence interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If thioflavin T is used for fluorescent staining to detect amyloid, then amyloid detection is enabled, but the emission signal overlaps with autofluorescence from biological molecules, complicating assessment
Solution Approach 1:
The patent changes the emission wavelength parameter by using fluorophores that emit in the red to near-infrared region (600-1000 nm), where biological autofluorescence is minimal. This parameter change shifts the detection window to a region with less interference, improving measurement precision while reducing harmful autofluorescence effects.
Solution Approach 2:
The patent extends the detection into the near-infrared dimension (beyond the visible range), utilizing the spectral dimension where autofluorescence interference is reduced. This dimensional shift from visible to near-infrared detection allows for better signal-to-noise ratio and improved detection accuracy.
2Measurement precision
If thioflavin T is used for amyloid detection, then amyloid identification is achieved, but the Stokes shift is small, limiting detection sensitivity
Solution Approach 1:
The patent changes the Stokes shift parameter by selecting fluorophores with large Stokes shifts (>100 nm). This parameter change increases the separation between excitation and emission wavelengths, reducing background interference and improving detection sensitivity for amyloid quantification.
3Measurement precision
If colorimetric staining with Congo red is used, then amyloid detection is possible, but polarized light microscopy is required and birefringence interpretation is difficult
Solution Approach 1:
The patent replaces the mechanical/optical system of polarized light microscopy with a simpler fluorescence detection system. By using fluorophores that emit in the red to near-infrared region, the invention eliminates the need for complex polarized light equipment while providing straightforward intensity-based detection and imaging.
4Measurement precision
If ELISA is used for amyloid detection, then amyloid quantification is achieved, but costly enzyme-linked antibodies and carcinogens are required
Solution Approach 1:
The patent replaces expensive, complex enzyme-linked antibodies with small-molecule fluorophores that can be directly applied. These fluorophore-based detection systems are cheaper, do not require enzyme substrates or carcinogenic chemicals, and can be used in simple one-step staining procedures, reducing both cost and safety concerns.
5Quantity of substance
If d8 or d10 metal complexes are used for detection, then sensitive detection in red to near-infrared region is achieved, but the complexes require aggregation and self-assembly to change photophysical properties
Solution Approach 1:
The patent utilizes the self-service principle by designing metal complexes that automatically aggregate and self-assemble upon binding to amyloid or RNA targets. This self-assembly process occurs spontaneously without external intervention, converting the complexes to aggregated states with enhanced photophysical properties and improved detection sensitivity.
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 metal complexes enable sensitive and specific detection and imaging of amyloid, plaque, and RNA, facilitating early diagnosis of neurodegenerative diseases and cancers with improved accuracy and reduced interference from biological substrates.
Implementation Method 1
bind to amyloid, plaque, or RNA through noncovalent interactions
Implementation Method 2
inducing aggregation and supramolecular self-assembly
Implementation Method 3
inducing aggregation and supramolecular self-assembly
Implementation Method 4
changes their photophysical properties, allowing for sensitive detection and imaging in the red to near-infrared region
Data Source
AI summary
Compounds are used for detection and/or imaging of amyloid, plaque, or both of proteins or peptides, for screening or testing the efficacy of inhibitors against amyloidosis and/or fibrillar growth of proteins or peptides, and/or for detection of RNA and nucleolus imaging. The compounds are d8 or d10 metal complexes or salts thereof. The metal complexes of the compounds can bind to amyloid, plaque, or both, of the proteins or peptides and/or RNA, nucleolus, or both. The binding induces accumulation and supramolecular self-assembly of the metal complexes, thereby causing hanges in the photophysical properties of the metal complexes.