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Capillary electrophoresis of PCR fragments with 5´-labelled primers for testing the SARS-Cov-2.


ABSTRACT: Due to the huge demand for SARS-Cov-2 determination,alternatives to the standard qtPCRtestsare potentially useful for increasing the number of samples screened. Our aim was to develop a direct fluorescent PCR capillary-electrophoresis detection of the viral genome. We validated this approach on several SARS-Cov-2 positive and negative samples.We isolated the naso-pharingealRNA from 20 positive and 10 negative samples. The cDNA was synthesised and two fragments of the SARS-Cov-2 were amplified. One of the primers for each pair was 5´-end fluorochrome labelled. The amplifications were subjected to capillary electrophoresis in ABI3130 sequencers to visualize the fluorescent peaks.The two SARS-Cov-2 fragments were successfully amplified in the positive samples, while the negative samples did not render fluorescent peaks. In conclusion, we describe and alternative method to identify the SARS-Cov-2 genome that could be scaled to the analysis of approximately 100 samples in less than 5?h. By combining a standard PCR with capillary electrophoresis our approach would overcome the limits imposed to many labs by the qtPCR and increase the testing capacity.

SUBMITTER: Gomez J 

PROVIDER: S-EPMC7351060 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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Capillary electrophoresis of PCR fragments with 5´-labelled primers for testing the SARS-Cov-2.

Gómez Juan J   Melón Santiago S   Boga José A JA   Alvarez-Argüelles Marta E ME   Rojo-Alba Susana S   Leal-Negredo Alvaro A   Castello-Abietar Cristian C   Alvarez Victoria V   Cuesta-Llavona Elías E   Coto Eliecer E  

Journal of virological methods 20200710


Due to the huge demand for SARS-Cov-2 determination,alternatives to the standard qtPCRtestsare potentially useful for increasing the number of samples screened. Our aim was to develop a direct fluorescent PCR capillary-electrophoresis detection of the viral genome. We validated this approach on several SARS-Cov-2 positive and negative samples.We isolated the naso-pharingealRNA from 20 positive and 10 negative samples. The cDNA was synthesised and two fragments of the SARS-Cov-2 were amplified. O  ...[more]

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