HCV Core Antigen Detection Using Cationic Detergent Pretreatment
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Solution Overview
Problem
Current methods for detecting hepatitis C virus (HCV) core polypeptide in samples are inefficient, leading to high false results and reduced throughput due to the need for lengthy incubation times and interference from chaotropic agents, which complicates high-throughput clinical analysis.
Innovation Solution
A method involving immediate contact of the sample with a surfactant comprising a cationic detergent, followed by a binding compound, which enhances detection sensitivity and specificity without the need for extended incubation, utilizing a pre-processing reagent that includes a cationic detergent and optionally an agent inducing a pH shift to improve the detection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional methods using chaotropic agents and extended incubation are used, then detection sensitivity is improved, but throughput is reduced and false results increase
Solution Approach 1:
The invention changes the chemical parameters of the detection system by replacing chaotropic agents with a cationic detergent (such as hexadecyltrimethylammonium chloride or cetyltrimethylammonium bromide) at optimized concentrations (0.1-1.0% w/v). This parameter change allows the assay to achieve high sensitivity without requiring extended incubation times, thereby improving throughput while maintaining detection precision
Solution Approach 2:
The cationic detergent is added to the sample before the binding compounds, performing preliminary disruption of viral particles and exposure of epitopes. This preliminary action eliminates the need for subsequent extended incubation steps with chaotropic agents, allowing rapid proceeding to detection while maintaining sensitivity
2Reliability
If traditional methods with extended incubation are used, then complete denaturation is achieved, but analysis time increases
Solution Approach 1:
The invention changes the temporal parameter by reducing incubation time from 10-60 minutes to just 1-5 minutes. This is achieved by changing the chemical environment to include cationic detergent, which provides rapid and effective denaturation of viral proteins, exposing epitopes for binding without requiring prolonged incubation
Solution Approach 2:
The method skips the extended incubation step traditionally required for complete denaturation by using cationic detergent, which achieves rapid denaturation and epitope exposure in minutes rather than hours, allowing the process to rush through to the detection phase
3Measurement precision
If chaotropic agents are used for viral particle disassembly, then sensitivity increases, but susceptibility to interference increases
Solution Approach 1:
The invention extracts and removes chaotropic agents from the detection system, replacing them with cationic detergent. This extraction eliminates the harmful interference effects associated with chaotropic agents while preserving the beneficial sensitivity enhancement through effective viral particle disassembly and epitope exposure
Solution Approach 2:
The cationic detergent acts as an intermediary substance that mediates viral particle disruption and epitope exposure without the interfering effects of chaotropic agents. It provides a clean chemical environment for subsequent binding reactions while maintaining high sensitivity
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 achieves a high recovery rate of at least 75% for HCV core polypeptide detection, significantly reducing false positives and enabling faster processing, thus improving the efficiency and accuracy of HCV detection in clinical settings.
Implementation Method 1
contacting said sample with a surfactant comprising a cationic detergent
Implementation Method 2
contacting said sample with a surfactant comprising a cationic detergent
Implementation Method 3
contacting said sample with a binding compound; and detecting a core polypeptide of said HCV in said sample
Data Source
AI summary
The present disclosure relates to a method for detecting a core polypeptide of a hepatitis C virus (HCV) in a sample from a subject with the steps of (a) contacting the sample with a surfactant comprising a cationic detergent; (b) contacting the sample with a binding compound; and (c) detecting a core polypeptide of the HCV in the sample; wherein step a) is immediately followed by step b). The present disclosure further relates to a method for pre-processing a sample from a subject for detection of an HCV core polypeptide, involving (a) contacting the sample with a surfactant comprising a cationic detergent and, optionally, with an agent inducing a pH shift, immediately followed by (b) contacting the sample with a binding compound. Moreover, the present disclosure further relates to uses, devices, and analytical systems related to aforesaid methods.