FKBP12 Sensor Monolayer for Rapid Subnanomolar Detection
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Solution Overview
Problem
Current methods for detecting FKBP12 protein concentrations are time-consuming, expensive, and not suitable for rapid and reliable analysis, preventing its use as a biomarker in neurodegenerative diseases, autoimmune diseases, and post-transplantation monitoring.
Innovation Solution
A sensor unit with a novel compound of formula (I) as a receptor for FKBP12, assembled in a monolayer on a substrate, allowing detection of subnanomolar concentrations with high accuracy, adaptable to various detection systems and using a matrix of inert molecules to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used for detecting FKBP12 protein concentrations, then detection can be performed, but the process is time-consuming and expensive
Solution Approach 1:
The patent replaces complex mechanical and chemical detection systems with an optical detection system based on surface plasmon resonance (SPR). The sensor unit uses a photodetector to measure optical signals generated by FKBP12 binding events on the sensor surface, eliminating the need for time-consuming sample preparation, washing steps, and chemical reagents required by conventional methods
Solution Approach 2:
The patent changes the detection parameter from measuring bulk solution properties to measuring surface-bound molecular interactions in real-time. By monitoring the refractive index changes at the sensor surface caused by FKBP12 binding, the system achieves rapid detection without the time-consuming steps of conventional assays
2Reliability
If conventional detection methods are used, then FKBP12 can be detected, but the cost is high and reliability is insufficient for rapid analysis
Solution Approach 1:
The sensor unit is designed to be self-regenerating through competitive displacement. After FKBP12 binds to the sensor surface, the binding can be reversed by adding a competitor molecule (FK506 or rapamycin), which displaces FKBP12 and restores the sensor surface for another measurement cycle. This eliminates the need for complex disposal and regeneration procedures, reducing costs while maintaining reliability
Solution Approach 2:
The sensor unit can detect multiple ligands of the FKBP12 protein by simply changing the competitor molecule used for displacement. The same sensor surface can be used to detect different compounds that bind to FKBP12, making the system universally applicable for detecting various molecules without requiring separate sensors for each target
3Measurement precision
If a sensor unit with monolayer receptor is used, then subnanomolar detection accuracy is achieved, but device complexity increases
Solution Approach 1:
The patent uses a self-assembled monolayer (SAM) of thin film molecules on the sensor surface to achieve high-resolution detection. The monolayer provides a controlled, uniform layer of receptor molecules that bind FKBP12 with high specificity, enabling subnanomolar detection precision while maintaining a relatively simple overall device structure
Solution Approach 2:
The sensor surface is segmented into distinct functional zones: a support surface for structural stability, a spacer layer for molecular orientation and accessibility, and a receptor layer for specific FKBP12 binding. This segmentation allows each component to be optimized independently while working together to achieve high detection precision
4Productivity
If early diagnosis of neurodegenerative diseases is enabled, then therapeutic success increases, but current methods are not suitable for widespread screening
Solution Approach 1:
The patent replaces complex mechanical and chemical detection systems with an optical detection system based on surface plasmon resonance (SPR). The sensor unit uses a photodetector to measure optical signals generated by FKBP12 binding events on the sensor surface, eliminating the need for time-consuming sample preparation, washing steps, and chemical reagents required by conventional methods
Solution Approach 2:
The sensor unit is designed to be self-regenerating through competitive displacement. After FKBP12 binds to the sensor surface, the binding can be reversed by adding a competitor molecule (FK506 or rapamycin), which displaces FKBP12 and restores the sensor surface for another measurement cycle. This eliminates the need for complex disposal and regeneration procedures, reducing costs while maintaining reliability
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
Enables rapid, accurate, and cost-effective detection of FKBP12 in biological samples, facilitating early diagnosis of neurodegenerative diseases and monitoring post-operative courses after transplantation.
Implementation Method 1
a ligand group for the univocal recognition of the FKBP12 protein
Implementation Method 2
an anchoring group for the covalent attack on the surface of a support
Implementation Method 3
sensor units comprising them, suitable for determining sub-nanomolar concentrations of FKBP12 protein
Data Source
AI summary
The present invention relates to novel compounds useful as sensors for the rapid and specific determination of the FKBP12 protein, a peptidyl-prolyl cis-trans isomerase (PPlase), the levels of which in the biological fluids of a subject change if the subject is affected by pathological conditions, in particular neurodegenerative diseases, such as the Parkinson's disease and the Alzheimer's syndrome, tumour pathologies, autoimmune diseases, or if that subject is in a phase of acute rejection after organ transplantation.