Kidney-Specific Clusterin Detection via Lectin-Antibody Composite Assay
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Solution Overview
Problem
Current methods for detecting kidney-specific clusterin in urine samples are hindered by contamination from serum clusterin, leading to false positive results due to the high concentration of clusterin in serum, which is particularly challenging in veterinary medicine where contamination is more pronounced.
Innovation Solution
The use of specific antibodies and lectins that bind to carbohydrate moieties of kidney-specific clusterin, while avoiding binding to other clusterin isoforms, allows for the detection of kidney-specific clusterin in urine samples, utilizing techniques such as lateral flow assays or ELISA to isolate and quantify the kidney-specific isoform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If general clusterin detection methods are used, then clusterin can be detected in urine samples, but false positive results occur due to serum contamination
Solution Approach 1:
The invention segments clusterin detection into two distinct targets: total clusterin and kidney-specific clusterin. By using sequential detection methods where kidney-specific clusterin is measured after total clusterin, the assay can distinguish between serum contamination (high total, low kidney-specific) and actual kidney damage (high total, high kidney-specific), thereby resolving the false positive problem
Solution Approach 2:
The invention introduces a differential detection system that acts as an intermediary between general clusterin detection and specific kidney damage diagnosis. By measuring both total clusterin and kidney-specific clusterin levels and comparing them, the system mediates the interpretation of results to eliminate false positives from serum contamination
2Quantity of substance
If serum clusterin is detected in urine samples, then clusterin concentration can be measured, but diagnostic specificity for kidney damage is reduced
Solution Approach 1:
The invention applies local quality by developing specific reagents (antibodies or lectins) that recognize only the carbohydrate moieties present on kidney-specific clusterin isoforms. This localized molecular recognition ensures that only the relevant clusterin form is detected, eliminating cross-reactivity with serum clusterin and improving diagnostic specificity
3Ease of operation
If conventional immunoassays are used for clusterin detection, then detection can be performed, but specificity for kidney-specific isoforms is insufficient
Solution Approach 1:
The invention uses composite detection reagents that combine antibodies (for clusterin backbone recognition) with lectins (for carbohydrate moiety recognition). This composite approach allows conventional immunoassay formats to be used while achieving high isoform specificity through the dual-recognition mechanism
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 enables accurate detection and quantification of kidney-specific clusterin, reducing false positives and improving diagnostic specificity for kidney damage or disease, even in the presence of serum contamination.
Implementation Method 1
contacting a sample with one or more antibodies or antigen binding fragments thereof that specifically bind clusterin
Implementation Method 2
one or more molecules that specifically bind to carbohydrate moieties of the first clusterin isoform
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
The present invention relates to methods and compositions for the detection of specific isoforms of clusterin.