Stimuli-Responsive Polymer Aggregation for Rapid Target Detection
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Solution Overview
Problem
Current methods for detecting and quantifying target substances, such as the latex aggregation method and enzyme-substrate reactions, are either costly, require specialized reagents, or are not suitable for rapid and sensitive detection in various environments, especially in poorly equipped settings like non-laboratory environments.
Innovation Solution
A method using a mixture of stimuli-responsive polymers and affinity substances that aggregate differently based on the presence of a target substance, allowing for detection and quantification without specialized reagents or equipment, utilizing a developing carrier to generate a signal indicative of the target's presence or amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the latex aggregation method is used for detection, then the operation is simple and rapid, but the detection sensitivity is insufficient for small amounts of antigen
Solution Approach 1:
The invention merges the operational simplicity of the latex aggregation method with the high sensitivity of enzyme-substrate reactions by combining latex particles carrying antibodies with enzyme-labeled detection systems, enabling both ease of use and high detection sensitivity
Solution Approach 2:
The invention uses composite latex particles that incorporate both antibody binding sites and enzyme labels, creating a multifunctional detection system that achieves high sensitivity while maintaining simple operation
2Measurement precision
If enzyme-substrate reaction methods are used, then the detection sensitivity is high, but the operating cost increases due to special reagents
Solution Approach 1:
The invention extracts the essential detection function from complex enzyme-substrate systems by using only the necessary components (latex particles with antibodies and minimal reagents), eliminating unnecessary special reagents while maintaining high sensitivity
Solution Approach 2:
The invention employs inexpensive latex particles as the primary detection medium that can be used in a single rapid measurement, eliminating the need for expensive reusable equipment and specialized reagents
3Measurement precision
If enzyme-substrate reaction methods are used, then the detection sensitivity is high, but the measurement time is extremely short to avoid color degradation
Solution Approach 1:
The invention uses a stable aggregation reaction that proceeds at a controlled rate, allowing measurements to be taken over an extended period rather than requiring immediate measurement within a short time window
Solution Approach 2:
The invention changes the detection parameter from measuring color intensity (which degrades quickly) to measuring aggregation degree (which remains stable over time), thereby extending the measurement time window while maintaining sensitivity
4Measurement precision
If enzyme-substrate reaction methods with multiple steps are used, then the detection sensitivity is high, but the operation becomes complex and time-consuming
Solution Approach 1:
The invention merges multiple detection steps into a single aggregation reaction by using latex particles pre-coated with antibodies that directly aggregate in the presence of target antigen, eliminating the need for separate incubation and detection steps
Solution Approach 2:
The invention performs preliminary preparation of antibody-coated latex particles in advance, so that the actual detection requires only mixing with the sample and measuring aggregation, greatly simplifying the operational steps
5Productivity
If the latex aggregation method is used, then the operation is rapid and simple, but it is not suitable for large-scale processing
Solution Approach 1:
The invention creates a universal detection system using standardized latex particle formulations that can be applied to various antigens and scaled up for high-throughput processing while maintaining the rapid and simple operational characteristics
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, inexpensive, and highly sensitive detection and quantification of target substances in diverse environments without the need for precision equipment or specialized reagents, providing a convenient and accurate method for detecting and quantifying substances like environmental pollutants and clinical markers.
Implementation Method 1
a substance containing a stimuli-responsive polymer binds to an affinity substance having affinity to the target substance
Implementation Method 2
an affinity substance having affinity to the target substance
Data Source
AI summary
Provided are a detection method and a quantification method for a detection target, which can detect and quantify the detection target rapidly, inexpensively, simply, and with high accuracy in a variety of environments. A method for detecting the detection target in a specimen includes processes in which there are mixed a first binding substance which binds a first material containing a stimuli-responsive polymer and a first affinity substance which has affinity for the detection target, a second binding substance which binds a hydrophilic second material and a second affinity substance which has affinity for the detection target, and a specimen; the resulting mixture is placed under conditions where the stimuli-responsive polymer agglutinates and the mixture is developed into a developing carrier, or the resulting mixture is developed into a developing carrier and the mixture is placed under conditions where the stimuli-responsive polymer agglutinates; the signal produced by the presence of the first binding substance or the second binding substance in the developing carrier is verified; and the presence of the detection target in the specimen is determined when the signal is different from that when the detection target is absent. The first affinity substance and the second affinity substance can bind to different positions of the detection target.