ArticleMolecular diagnosis & therapy2019
Vortex- and Centrifugation-Free Extraction of HIV-1 RNA.
Article in Molecular diagnosis & therapy, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
3 citing papers in PubMed.
- Trends of nucleic acid - based point-of-care diagnostics for infectious diseases.Journal of biological engineering · 2026Review
- Extraction-free RT-RPA assay for detection of HPV16, HPV18, and HPV45 mRNA expression.Scientific reports · 2025Article
- Isolation of target DNA using synergistic magnetic bead transport and electrokinetic flow.Biomicrofluidics · 2021Article
Corrections and comments
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Authors and funding
6 authors.
Funding
Abstract
BACKGROUND AND
objectiveHIV viral load measurements play a critical role in monitoring disease progression in those who are on antiretroviral treatment. In order to obtain an accurate measurement, rapid sample preparation techniques are required. There is an unmet need for HIV extraction instruments in resource-limited settings, where HIV prevalence is high. Therefore, the objective of our study was to develop a three-dimensional (3D) microfluidic system to extract HIV-1 RNA with minimal electricity and without complex laboratory instruments.
methodsA 3D microfluidic system was designed in which magnetic beads bound with nucleic acids move through immiscible oil-water interfaces to separate HIV-1 RNA from the sample. Polymerase chain reaction (PCR) amplification was used to quantify the total amount of HIV-1 RNA extracted as we optimized the system through chip design, bead type, carry-over volume, carrier RNA concentration, and elution buffer temperature. Additionally, the extraction efficiency of the 3D microfluidic system was evaluated by comparing with a Qiagen EZ1 Advanced XL instrument using 20 HIV-1-positive plasma samples.
resultsOur method has near-perfect (100%) extraction efficiency in spiked serum samples with as little as 50 copies/mL starting sample. Furthermore, we report carry-over volumes of 0.31% ± 0.006% of total sample volume. Using the EZ1 Advanced XL as a gold standard, the average percentage HIV-1 RNA extracted using the microchip was observed to be 65.4% ± 24.6%.
conclusionsFrom a clinical perspective, the success of our method opens up its possible use in diagnostic tests for HIV in the remote areas where access to vortexes and centrifuges is not available. Here we present a proof-of-concept device which, with further development, could be used for sample preparation at the point of care.
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