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  • SARS-CoV-2 RNA elements share human sequence identity and upregulate hyaluronan via NamiRNA-enhancer network #MMPMID35124429
  • Li W; Yang S; Xu P; Zhang D; Tong Y; Chen L; Jia B; Li A; Lian C; Ru D; Zhang B; Liu M; Chen C; Fu W; Yuan S; Gu C; Wang L; Li W; Liang Y; Yang Z; Ren X; Wang S; Zhang X; Song Y; Xie Y; Lu H; Xu J; Wang H; Yu W
  • EBioMedicine 2022[Feb]; 76 (ä): 103861 PMID35124429show ga
  • BACKGROUND: Since late 2019, SARS-CoV-2 infection has resulted in COVID-19 accompanied by diverse clinical manifestations. However, the underlying mechanism of how SARS-CoV-2 interacts with host and develops multiple symptoms is largely unexplored. METHODS: Bioinformatics analysis determined the sequence similarity between SARS-CoV-2 and human genomes. Diverse fragments of SARS-CoV-2 genome containing Human Identical Sequences (HIS) were cloned into the lentiviral vector. HEK293T, MRC5 and HUVEC were infected with laboratory-packaged lentivirus or transfected with plasmids or antagomirs for HIS. Quantitative RT-PCR and chromatin immunoprecipitation assay detected gene expression and H3K27ac enrichment, respectively. UV-Vis spectroscopy assessed the interaction between HIS and their target locus. Enzyme-linked immunosorbent assay evaluated the hyaluronan (HA) levels of culture supernatant and plasma of COVID-19 patients. FINDINGS: Five short sequences (24-27 nt length) sharing identity between SARS-CoV-2 and human genome were identified. These RNA elements were highly conserved in primates. The genomic fragments containing HIS were predicted to form hairpin structures in silico similar to miRNA precursors. HIS may function through direct genomic interaction leading to activation of host enhancers, and upregulation of adjacent and distant genes, including cytokine genes and hyaluronan synthase 2 (HAS2). HIS antagomirs and Cas13d-mediated HIS degradation reduced HAS2 expression. Severe COVID-19 patients displayed decreased lymphocytes and elevated D-dimer, and C-reactive proteins, as well as increased plasma hyaluronan. Hymecromone inhibited hyaluronan production in vitro, and thus could be further investigated as a therapeutic option for preventing severe outcome in COVID-19 patients. INTERPRETATION: HIS of SARS-CoV-2 could promote COVID-19 progression by upregulating hyaluronan, providing novel targets for treatment. FUNDING: The National Key R&D Program of China (2018YFC1005004), Major Special Projects of Basic Research of Shanghai Science and Technology Commission (18JC1411101), and the National Natural Science Foundation of China (31872814, 32000505).
  • |*Genome, Human[MESH]
  • |Antagomirs/metabolism[MESH]
  • |Argonaute Proteins/genetics[MESH]
  • |Base Sequence[MESH]
  • |COVID-19/pathology/virology[MESH]
  • |Cell Line[MESH]
  • |Disease Progression[MESH]
  • |Enhancer Elements, Genetic/genetics[MESH]
  • |Gene Regulatory Networks/*genetics[MESH]
  • |Humans[MESH]
  • |Hyaluronan Synthases/genetics/metabolism[MESH]
  • |Hyaluronic Acid/blood/*metabolism[MESH]
  • |MicroRNAs/genetics[MESH]
  • |RNA, Viral/chemistry/*genetics[MESH]
  • |SARS-CoV-2/*genetics/isolation & purification/pathogenicity[MESH]
  • |Up-Regulation[MESH]

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  • suck abstract from ncbi

    103861 ä.76 2022