Surfactant Treatment Liquid for Steroid Desorption from Cyclodextrin
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Solution Overview
Problem
The challenge in immunologically quantifying steroids is the deviation in antigen-antibody reaction behaviors between specimen and standard solutions, particularly when using cyclodextrin-based standard solutions, leading to inaccurate steroid quantification due to steroid decomposition and adsorption issues.
Innovation Solution
A treatment liquid containing specific surfactants, such as N-octanoyl-N-methylglucamine and 3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate, is used to exclude steroids from cyclodextrin, ensuring accurate antigen-antibody reactions by matching the behavior of specimen and standard solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cyclodextrin is added to the standard solution to stabilize the steroid, then the steroid signal intensity is maintained, but the antigen-antibody reaction behavior deviates from the specimen
Solution Approach 1:
A surfactant is introduced as an intermediary substance that interacts with both the cyclodextrin-steroid complex and the antibody. The surfactant binds to the cyclodextrin-steroid complex, facilitating the release of the steroid while maintaining compatibility with the antibody's binding characteristics, thus resolving the conflict between stabilization and accurate measurement
Solution Approach 2:
The physical-chemical parameters of the standard solution are modified by adding the surfactant, which changes the interaction between cyclodextrin and steroid. This parameter change allows the steroid to be released from cyclodextrin while maintaining the conditions necessary for accurate antigen-antibody reaction, thereby improving quantification accuracy
2Object-affected harmful factors
If a buffer solution containing protein is used instead of serum to avoid infection risk, then safety is improved, but the steroid decomposes with time
Solution Approach 1:
Cyclodextrin serves as an intermediary that binds to the steroid in the buffer solution, protecting it from decomposition while maintaining the safety benefits of using a protein-free buffer system. This allows the standard solution to be both safe and stable
Solution Approach 2:
The steroid is pre-bound to cyclodextrin in the standard solution preparation, which prevents decomposition before the measurement process begins. This preliminary action ensures stability throughout the experiment while maintaining the safety advantages of the buffer-based system
3Reliability
If the steroid is included in cyclodextrin to prevent adsorption to container, then the steroid signal intensity is maintained, but the antigen-antibody reaction behavior deviates from the specimen
Solution Approach 1:
The surfactact acts as a mediator that interacts with the cyclodextrin-steroid complex, facilitating the release of the steroid while maintaining conditions compatible with accurate antigen-antibody reaction. This resolves the conflict between preventing adsorption and ensuring accurate measurement
Solution Approach 2:
The addition of surfactant changes the physical-chemical parameters of the solution, modifying the cyclodextrin-steroid interaction to allow steroid release while maintaining signal intensity and reaction behavior consistency with the specimen
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 significantly improves the accuracy of steroid quantification by suppressing behavioral deviations in antigen-antibody reactions, allowing for precise measurement in both buffer and serum-based standard solutions.
Implementation Method 1
a treatment liquid for use in desorption of steroid included in cyclodextrin
Implementation Method 2
allowing the hydrophobic interior of the cyclodextrin to include a steroid, achieving stabilization
Implementation Method 3
the action of surfactant suppresses the deviation in behavior of the antigen-antibody reaction between the specimen (test sample) and the standard solution
Data Source
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AI summary
The present inventors have found that, in a method for immunologically quantifying a steroid, it is possible to exclude a steroid from cyclodextrin when a standard solution containing the steroid included in cyclodextrin is treated with a surfactant, which thereby suppresses the deviation in behavior of the antigen-antibody reaction between the specimen (test sample) and the standard solution, and then significantly improves the accuracy of steroid quantification.