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• W4385802021 abstract "Introduction: During the COVID-19 pandemic, an extraordinary number of nasopharyngeal secretion samples inoculated in viral transport medium (VTM) were collected and analyzed to detect SARS-CoV-2 infection. In addition to viral detection, those samples can also be a source of host genomic material, providing excellent opportunities for biobanking and research. Objective: To describe a simple, in-house-developed DNA extraction method to obtain high yield and quality genomic DNA from VTM samples for host genetic analysis and assess its relative efficiency by comparing its yield and suitability to downstream applications to two different commercial DNA extraction kits. Methods: In this study, 13 VTM samples were processed by two commercial silica-based kits and compared with an in-House-developed protocol for host DNA extraction. An additional 452 samples were processed by the in-House method. The quantity and quality of the differentially extracted DNA samples were assessed by Qubit and spectrophotometric measurements. The suitability of extracted samples for downstream applications was tested by polymerase chain reaction (PCR) amplification followed by amplicon sequencing and allelic discrimination in real-time PCR. Results: The in-House method provided greater median DNA yield (0.81 μg), being significantly different from the PureLink® method (0.14 μg, p < 0.001), but not from the QIAamp® method (0.47 μg, p = 0.980). Overall satisfactory results in DNA concentrations and purity, in addition to cost, were observed using the in-House method, whose samples were able to produce clear amplification in PCR and sequencing reads, as well as effective allelic discrimination in real-time PCR TaqMan® assay. Conclusion: The described in-House method proved to be suitable and economically viable for genomic DNA extraction from VTM samples for biobanking purposes. These results are extremely valuable for the study of the COVID-19 pandemic and other emergent infectious diseases, allowing host genetic studies to be performed in samples initially collected for diagnosis." @default.
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• W4385802021 date "2023-08-09" @default.
• W4385802021 modified "2023-09-27" @default.
• W4385802021 title "An Efficient Extraction Method Allowing the Genetic Evaluation of Host DNA from Samples Collected for Virus Infection Diagnosis in Viral Transport Medium" @default.
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• W4385802021 doi "https://doi.org/10.1089/bio.2022.0188" @default.
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