HBV RNA Detection Using Competitive Blocking Oligonucleotides
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Solution Overview
Problem
Current diagnostic methods for Hepatitis B Virus (HBV) are not sensitive enough to detect HBV RNA in the presence of homologous DNA without manual sample preparation or DNAse treatment, limiting their effectiveness in monitoring disease state and therapeutic efficacy.
Innovation Solution
The use of competitive blocking oligonucleotides that hybridize to HBV DNA, preventing primer binding and allowing for the selective amplification and detection of HBV RNA in a single tube, without the need for DNA removal techniques, using a combination of reverse transcription primers and probes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual sample preparation or DNAse treatment is used to remove DNA, then detection sensitivity of HBV RNA is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The invention extracts and removes the harmful component (DNA) from the sample using a DNAse enzyme treatment step before amplification. This extraction approach eliminates DNA interference with HBV RNA detection, improving measurement precision while maintaining relatively simple操作流程 through a dedicated enzymatic treatment step
Solution Approach 2:
The invention introduces an intermediary substance (DNAse enzyme) that selectively degrades DNA without affecting RNA. This mediator enables selective removal of DNA interference while preserving the target HBV RNA, resolving the contradiction between detection sensitivity and operational simplicity
2Measurement precision
If DNA removal techniques are used, then HBV RNA detection accuracy is improved, but productivity and ease of operation worsen
Solution Approach 1:
The invention performs DNA removal as a preliminary action before the amplification and detection steps. By pre-treating the sample with DNAse to eliminate DNA interference beforehand, the subsequent amplification can proceed without inhibition, improving detection accuracy while allowing high-throughput processing through automated workflow integration
Solution Approach 2:
The invention maintains continuous useful action by performing DNAse treatment in a manner that does not interrupt the overall testing workflow. The enzymatic treatment occurs in parallel with or immediately before sample processing, ensuring continuous productivity while maintaining detection accuracy through persistent DNA removal
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 rapid, reliable, and sensitive detection of HBV RNA, distinguishing it from DNA, thereby improving monitoring of HBV disease state and therapeutic efficacy without the need for manual sample preparation or DNAse treatment.
Implementation Method 1
competitive blocking oligonucleotides that hybridize to HBV DNA, preventing primer binding
Implementation Method 2
using a combination of reverse transcription primers and probes
Data Source
AI summary
Methods for the rapid detection of the presence or absence of Hepatitis B Virus (HBV) in a biological or non-biological sample are described. The methods can include performing an amplifying step, a hybridizing step, and a detecting step. Furthermore, primers, competitive blocking oligonucleotides, and probes targeting HBV (in particular HBV RNA, in particular, HBV RNA transcribed from cccDNA, such as pgRNA) and kits are provided that are designed for the detection of HBV (in particular HBV RNA, in particular, HBV RNA transcribed from cccDNA, such as pgRNA).