Low-cost, rapid quantitative Isothermal Assay for HIV RNA using ZNA

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DESCRIPTION (provided by applicant): In this Phase I project, we propose to investigate a novel primer chemistry and probe detection system called the Zip nucleic acids (ZNA"). ZNAs are oligonucleotides conjugated to a number of cationic spermine moieties that enhance the effective concentration of primers and probes near nucleic acid targets. This property has been reported to enhance the speed and sensitivity of RT-PCR (Moreau et al. 2009). ZNAs are compatible with Taqman detection formats (Paris et al. 2010). We expect this detection technology will further accelerate our RNA detection assays as well as increase our accuracy. We will compare the performance of ZNA to LNA DNA dual labeled (Tong et al. 2008, Li et al. 2010) and CPT probes. By the end of the study we will have completed the analytical study stage required for the commercial release of an IsoAmp HIV-1 quantitative assay. Our phase I research plan includes 4 aims: 1. Design and test ZNA primers targeting all subtypes of HIV-1, 2. Design and test with both ZNA taqman and ZNA cycling probes for the HIV assay, 3. Develop a simple work flow for extraction of RNA from dry blood spots (DBS) and dry plasma spots (DPS), and 4. Test the sensitivity and specificity of assays using the ZNA technology in combination with IsoAmp in a panel of HIV-1 isolates. At the conclusion of Phase I, we will be ready to identify the best probe technology to develop a commercial IsoAmp HIV-1 quantitative assay for commercial distribution in the US and abroad. We will also have a clear indication of the type of sample extraction method that best suits HDA viral load testing. In Phase II, we would develop a pre-IDE for a multi-site clinical study plan to seek FDA approval for sale in the US. We would also explore commercial release in the rest of the World.