HDL3 Cholesterol Quantification Using Surfactant Selectivity
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Solution Overview
Problem
Current methods for measuring HDL3 cholesterol are labor-intensive, require specialized equipment, and often involve manual operations or interference from other lipoproteins, making them impractical for widespread use.
Innovation Solution
A method using surfactants that specifically react with HDL3, allowing for quantification of HDL3 cholesterol in a test sample without laborious operations, using an automatic analyzer, and enabling the measurement of HDL2 cholesterol by subtracting HDL3 from total HDL cholesterol levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ultracentrifugation is used to measure HDL subfractions, then measurement precision is improved, but device complexity and ease of operation deteriorate due to requiring specialized equipment and skilled operations
Solution Approach 1:
The patent replaces the mechanical ultracentrifugation system with a chemical reaction system using surfactants and enzymes. Instead of using centrifugal force to separate lipoproteins by density, the invention uses selective chemical reactions: surfactants selectively bind to HDL3, and enzymes (cholesterol esterase and cholesterol oxidase) specifically act on the cholesterol within HDL3 to produce a measurable color change. This substitution eliminates the need for specialized ultracentrifugation equipment while maintaining measurement precision.
2Measurement precision
If HPLC is used to separate HDL2 and HDL3, then measurement precision is improved, but device complexity and ease of operation worsen due to requiring special equipment and long operation time
Solution Approach 1:
The patent replaces the mechanical HPLC separation system with a chemical reaction system. Instead of using chromatographic separation based on molecular properties, the invention employs selective chemical reactions where surfactants specifically interact with HDL3 and enzymes selectively metabolize cholesterol within HDL3. This chemical approach eliminates the need for complex HPLC equipment and reduces operation time while achieving accurate HDL3 quantification.
3Ease of operation
If HDL3 precipitation method is used, then ease of operation is improved compared to ultracentrifugation, but measurement precision deteriorates due to interference from other lipoproteins and requirement of manual operations
Solution Approach 1:
The patent introduces surfactants as intermediaries that selectively bind to HDL3, creating a specific interaction that distinguishes HDL3 from other lipoproteins. The surfactants act as mediators between the HDL3 and the enzymatic reaction system, enabling selective identification and measurement of HDL3 cholesterol without interference from other lipoprotein fractions. This intermediary approach maintains ease of operation while significantly improving measurement precision.
4Measurement precision
If NMR is used to measure lipoprotein particles, then measurement precision is improved, but device complexity and ease of operation worsen due to requiring special equipment
Solution Approach 1:
The patent replaces the complex NMR measurement system with a simple colorimetric chemical reaction system. Instead of using magnetic resonance to detect and quantify lipoprotein particles, the invention uses surfactant-selective binding followed by enzymatic conversion of cholesterol to colored products that can be measured with standard spectrophotometers. This substitution eliminates the need for expensive and complex NMR equipment while providing accurate HDL3 cholesterol measurement.
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 specific and selective quantification of HDL3 cholesterol without requiring skilled operations or specialized equipment, allowing for accurate measurement of HDL2 cholesterol levels as well, thereby simplifying the process and improving diagnostic capabilities.
Implementation Method 1
reacting, with a test sample, a surfactant that specifically reacts with high-density lipoprotein 3
Data Source
AI summary
A method that enables quantification of cholesterol in high-density lipoprotein 3 (HDL3) in a test sample without requiring a laborious operation is disclosed. The method for quantifying cholesterol in HDL3 comprises reacting, with a test sample, a surfactant that specifically reacts with high-density lipoprotein 3, and quantifying cholesterol. The method enables specific quantification of HDL3 cholesterol in a test sample using an automatic analyzer without requirement of a laborious operation such as ultracentrifugation or pretreatment. Further, quantification of the HDL2 cholesterol level can also be carried out by subtracting the HDL3 cholesterol level from the total HDL cholesterol level obtained by a conventional method for quantifying the total HDL cholesterol in a test sample.