Dioxetane Probe Microorganism Detection
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Solution Overview
Problem
Current methods for detecting microorganisms, particularly bacteria, are limited by the complexity and cost of the luciferase-luciferin system, and existing chemiluminescent probes are not suitable for real-life applications due to toxicity, stability, and sensitivity issues in aqueous media.
Innovation Solution
Development of dioxetane compounds with specific analyte-responsive groups and self-immolative linker groups that can be used to detect microorganisms through chemiluminescent indication, allowing for simpler and more sensitive detection in aqueous media without the need for additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the luciferase-luciferin system is used for detection, then sensitivity is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the essential chemiluminescent detection function from the complex luciferase-luciferin system by using a standalone dioxetane compound that directly reacts with hydrogen peroxide to produce light, eliminating the need for luciferase enzyme and other auxiliary components while maintaining high detection sensitivity
Solution Approach 2:
The patent creates a simplified copy of the bioluminescence detection principle using chemical chemiluminescence instead of biological enzymes, replicating the light-emission function through a chemical reaction between dioxetane and hydrogen peroxide, thereby achieving similar sensitivity without biological complexity
2Measurement precision
If chemiluminescent dioxetane probes are used, then sensitivity is improved, but reliability deteriorates due to instability in aqueous media
Solution Approach 1:
The patent modifies the chemical parameters of the dioxetane compound by introducing specific substituents (aromatic groups, electron-withdrawing or electron-donating groups) that enhance the compound's stability in aqueous environments while preserving its chemiluminescent reactivity with hydrogen peroxide
Solution Approach 2:
The patent creates composite molecular structures by combining the doxetane core with various aromatic substituents and linker groups, forming a composite probe structure that achieves both high detection sensitivity and improved stability in aqueous media through the synergistic effect of different molecular components
3Measurement precision
If enzyme-labile protecting groups are used to mask probes, then detection specificity is improved, but ease of operation worsens due to complex interactions
Solution Approach 1:
The patent employs enzyme-labile protecting groups that automatically decompose in the presence of target microorganisms, enabling the dioxetane probe to self-activate and produce chemiluminescent signal without requiring external activation steps, thereby maintaining high specificity while simplifying operation
Solution Approach 2:
The patent pre-masks the dioxetane probe with enzyme-labile protecting groups before use, so that the probe is already prepared in a stable, non-reactive state that will automatically become active upon encountering the target microorganism's enzymes, eliminating the need for separate activation procedures
4Measurement precision
If multiple components are used for detection, then measurement precision is improved, but productivity decreases due to complex procedures
Solution Approach 1:
The patent merges multiple detection functions (specificity through enzyme-labile groups, sensitivity through chemiluminescence, and stability through molecular design) into a single integrated dioxetane probe molecule, eliminating the need for separate reagents and simplifying the detection procedure to improve productivity
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 dioxetane compounds provide a more sensitive and straightforward method for detecting microorganisms, offering higher stability and sensitivity compared to the luciferase-luciferin system, enabling easy and reliable detection in real-life conditions.
Implementation Method 1
chemiluminescent indication of action of metabolic, reagent or reference enzymes on suitable molecular probes, indication of hydrogen peroxide resulting from enzymatic oxidation
Implementation Method 2
D-luciferin can be masked with enzyme labile groups, restricting light emission in the presence of luciferase to situations where also the enzyme acting on the enzyme labile group is present
Data Source
AI summary
A method is for the detection of presence or absence, quantification, and identification of target microorganisms, such as bacteria, bacterial fragments (e.g., LPS, endotoxin), viruses, fungi as well as other pathogens by means of chemiluminescence. The method include providing a medium with one or more target analytes, target microorganisms or target metabolites, adding a dioxetane compound to the medium so that the dioxetane compound emits light, and detecting the emitted light.