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bioRxiv · 10.1101/2025.07.31.667828

Strand Displacement Chain Reaction (SDCR): New Hybrid Amplification Technique for Fast and Sensitive Detection of Genetic Materials

Smirnova, E. V.·Barsova, E. V.·Varlamov, D. A.·Kramarov, V. M.·Blagodatskikh, K. A.·Ignatov, K. B.
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Abstract

Nucleic acid amplification methods are widely used in science, medicine and forensics for molecular biological assays and for the detection of genetic material. The newly developed strand displacement chain reaction (SDCR) method is a hybrid amplification technique based on polymerase chain reaction (PCR) and isothermal nucleic acid amplification. Here, we compared conventional PCR, the "gold standard" for molecular diagnostic assays, with the SDCR method by performing real-time amplification assays using human, bacterial and viral genetic materials. In the assays, SDCR demonstrated very high sensitivity and amplification efficiency. We found that the SDCR method provided an amplification factor above three, which noticeably outperformed that of PCR amplification and enabled a marked reduction in the number of cycles in comparison with PCR. Therefore, the new hybrid amplification technique could be extremely useful for the detection of genetic material and the development of new diagnostic kits.

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Smirnova, E. V., Barsova, E. V., Varlamov, D. A., Kramarov, V. M., Blagodatskikh, K. A., Ignatov, K. B.. 2025-08-02. Strand Displacement Chain Reaction (SDCR): New Hybrid Amplification Technique for Fast and Sensitive Detection of Genetic Materials. https://doi.org/10.1101/2025.07.31.667828

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