RT-LAMP HIV-1 Nucleic Acid Detection via Isothermal Amplification
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Solution Overview
Problem
Current HIV diagnostic tests, especially rapid antibody tests, are not sensitive enough to detect early HIV infection, missing individuals during the post-infection but pre-seroconversion period, and there is a need for a more efficient point-of-care (POC) testing method that can accurately and timely diagnose HIV-1 nucleic acids.
Innovation Solution
Development of a highly sensitive and specific rapid HIV-1 nucleic acid amplification test (NAAT) using loop-mediated isothermal amplification (LAMP) or reverse transcription-LAMP (RT-LAMP) techniques that can amplify HIV-1 nucleic acids directly from whole blood, plasma, or saliva without the need for thermal cycling, allowing for early detection and minimal equipment requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If rapid antibody tests are used for HIV screening, then the testing can be completed quickly at point-of-care with minimal equipment, but the sensitivity is insufficient to detect early HIV infection during the post-infection but pre-seroconversion period
Solution Approach 1:
The invention changes the detection parameter from antibody detection to nucleic acid detection through RT-LAMP amplification, enabling detection during the pre-seroconversion period when antibodies are not yet present but viral nucleic acids are detectable
Solution Approach 2:
The invention replaces the thermal cycling mechanism of traditional PCR with isothermal amplification using RT-LAMP, eliminating the need for complex thermal cyclers while maintaining nucleic acid detection capability at point-of-care settings
2Measurement precision
If laboratory-based NAAT is used for HIV detection, then the detection sensitivity is high and can detect infection approximately two weeks earlier than antibody-based tests, but the testing requires complex equipment and cannot be performed at point-of-care
Solution Approach 1:
The invention substitutes the complex thermal cycling system with an isothermal amplification system using RT-LAMP, which only requires a simple heat block or water bath, thereby reducing equipment complexity while maintaining high detection sensitivity
Solution Approach 2:
The invention changes the amplification condition from cyclic temperature changes to constant temperature operation, simplifying the equipment requirements while preserving the ability to detect HIV nucleic acids with high sensitivity
3Measurement precision
If traditional PCR is used for HIV nucleic acid amplification, then the detection sensitivity is high, but the thermal cycling process requires complex equipment and extended testing time
Solution Approach 1:
The invention replaces the thermal cycling mechanism with isothermal amplification using RT-LAMP, which operates at a constant temperature (typically 60-65°C), eliminating the need for complex thermal cyclers and reducing equipment requirements
4Ease of operation
If rapid antibody tests are used, then the testing can be performed with minimal technical expertise, but they remain negative during the post-infection but pre-seroconversion period and miss early infections
Solution Approach 1:
The invention changes the detection target from antibodies to viral nucleic acids, enabling detection during the pre-seroconversion period while maintaining ease of operation through the use of isothermal amplification and simple detection methods
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
The RT-LAMP assays provide early detection of HIV-1 up to 24 days earlier than rapid antibody tests, with high sensitivity and specificity, facilitating timely diagnosis and improving the detection of acute infections at the point of care with ease of use and minimal equipment needs.
Implementation Method 1
reverse transcription-LAMP (RT-LAMP) techniques that can amplify HIV-1 nucleic acids
Implementation Method 2
Loop-mediated isothermal amplification (LAMP) or reverse transcription-LAMP (RT-LAMP) are examples of such an isothermal amplification technique
Data Source
AI summary
Disclosed herein are methods of detecting HIV-1 nucleic acids in a sample (such as from a sample containing or suspected to contain HIV-1 nucleic acid). In some examples, the methods include loop-mediated isothermal amplification (LAMP) or reverse transcription-LAMP (RT-LAMP). In some examples, the methods include contacting a sample with one or more sets of LAMP primers specific for HIV-1 (such as LAMP primers specific for an HIV-1 integrase nucleic acid or LAMP primers specific for an HIV-1 reverse transcriptase nucleic acid) under conditions sufficient to produce an amplification product and detecting the amplification product. Sets of LAMP primers for detection of HIV-1 integrase nucleic acids (such as SEQ ID NOs: 8-14 or 8-27) and HIV-1 reverse transcriptase nucleic acids (such as SEQ ID NOs: 1-7) are provided herein.