1. Conserved MicroRNAs in Human Nasopharynx Tissue Samples from Swabs Are Differentially Expressed in Response to SARS-CoV-2.
- Author
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Eichmeier A, Kiss T, Kocanova M, Hakalova E, Spetik M, Cechova J, and Tichy B
- Subjects
- COVID-19 pathology, COVID-19 virology, Down-Regulation, High-Throughput Nucleotide Sequencing, Humans, MicroRNAs chemistry, Nasopharynx virology, Principal Component Analysis, RNA, Viral metabolism, Real-Time Polymerase Chain Reaction, SARS-CoV-2 genetics, SARS-CoV-2 isolation & purification, Sequence Analysis, RNA, Transcriptome, Up-Regulation, MicroRNAs metabolism, Nasopharynx metabolism, SARS-CoV-2 physiology
- Abstract
The use of high-throughput small RNA sequencing is well established as a technique to unveil the miRNAs in various tissues. The miRNA profiles are different between infected and non-infected tissues. We compare the SARS-CoV-2 positive and SARS-CoV-2 negative RNA samples extracted from human nasopharynx tissue samples to show different miRNA profiles. We explored differentially expressed miRNAs in response to SARS-CoV-2 in the RNA extracted from nasopharynx tissues of 10 SARS-CoV-2-positive and 10 SARS-CoV-2-negative patients. miRNAs were identified by small RNA sequencing, and the expression levels of selected miRNAs were validated by real-time RT-PCR. We identified 943 conserved miRNAs, likely generated through posttranscriptional modifications. The identified miRNAs were expressed in both RNA groups, NegS and PosS: miR-148a, miR-21, miR-34c, miR-34b, and miR-342. The most differentially expressed miRNA was miR-21, which is likely closely linked to the presence of SARS-CoV-2 in nasopharynx tissues. Our results contribute to further understanding the role of miRNAs in SARS-CoV-2 pathogenesis, which may be crucial for understanding disease symptom development in humans.
- Published
- 2022
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