Apolipoprotein Detection via Polystyrene Adsorption
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Solution Overview
Problem
Current methods for detecting and quantifying apolipoproteins, particularly apoE isoforms, are complex, time-consuming, and not easily implementable in clinical settings, lacking reliable and accurate techniques for fast determination in samples.
Innovation Solution
A method involving direct electrostatic and hydrophobic interaction of apolipoproteins with polystyrene surfaces, followed by antibody binding and detection, allowing for the quantification of apoE isoforms like apoE4 without the need for capture antibodies or prior isolation, applicable to various apolipoproteins including apoAI, apoAIV, apoCI, apoCII, apoCIII, and apoJ.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PCR-RFLP, capillary electrophoresis, or other genetic methods are used for APOE genotyping, then genotyping accuracy is improved, but the complexity of the procedure and time consumption increase significantly
Solution Approach 1:
The invention extracts only the necessary functional information (apolipoprotein isoform presence) from the complex genetic analysis process. Instead of performing complete genomic DNA analysis through PCR and sequencing, the method directly detects apolipoprotein isoforms in plasma using immunoassay techniques, extracting only the clinically relevant information needed for risk assessment.
Solution Approach 2:
The invention introduces apolipoprotein isoform detection as an intermediary between genetic genotype and disease risk phenotype. Rather than directly analyzing DNA sequences or using complex genetic markers, the method uses apolipoprotein isoform levels in plasma as an intermediate biomarker that reflects the functional outcome of APOE genotypes, simplifying the path to clinical decision-making.
2Adaptability or versatility
If isoelectric focusing (IEF) with immunodetection is used for apoE isoform characterization, then detection capability for rare variants is improved, but the time required and technical expertise needed increase
Solution Approach 1:
The invention employs commercially available ELISA kits that are self-contained and require minimal technical preparation. The kits include pre-coated antibodies, buffer solutions, and detection reagents that work together in a standardized protocol, allowing laboratory personnel with basic immunoassay training to perform the analysis without requiring specialized expertise in electrophoresis or rare variant identification.
3Measurement precision
If sandwich ELISA with isoform-specific antibodies is used for apoE detection, then specificity for particular isoforms is improved, but the availability of required antibodies and implementation difficulty worsen
Solution Approach 1:
The invention uses a universal detection approach where a single ELISA kit can detect multiple apolipoprotein isoforms (apoE2, apoE3, apoE4) through a common assay protocol. The kit employs a capture antibody that recognizes a conserved epitope across all isoforms, allowing simultaneous quantification of different isoforms without requiring separate antibody preparations or optimized protocols for each variant.
4Reliability
If complex genetic analysis methods are used for disease risk prediction, then predictive accuracy is improved, but the ease of clinical implementation deteriorates
Solution Approach 1:
The invention replaces the mechanical and procedural complexity of genetic analysis (DNA extraction, PCR amplification, gel electrophoresis, sequencing) with a simpler immunoassay-based detection system. The ELISA method uses antibody-antigen binding chemistry to directly detect apolipoprotein isoforms in plasma, eliminating multiple mechanical steps and reducing the need for specialized equipment while maintaining clinical utility for Alzheimer's disease risk prediction.
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 method provides a simple, reliable, and cost-effective means for apolipoprotein detection and quantification, enabling efficient patient stratification and risk assessment for neurodegenerative and cardiovascular diseases, suitable for clinical and research use.
Implementation Method 1
direct electrostatic and hydrophobic interaction of apolipoproteins with polystyrene surfaces
Implementation Method 2
direct electrostatic and hydrophobic interaction of apolipoproteins with polystyrene surfaces
Implementation Method 3
Contacting the surface to which the apolipoprotein is bound formed in step (i) with an antibody specific for said apolipoprotein under suitable conditions for the formation of a complex between the antibody and the apolipoprotein
Data Source
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AI summary
The present invention relates to methods for the detection and quantification of apolipoproteins and isoforms thereof in a sample, as well as to predictive methods of the probability of neurodegenerative or cardiovascular disease development based on apolipoprotein levels as determined by the detection methods of the invention.