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10.3389/fimmu.2021.733921

http://scihub22266oqcxt.onion/10.3389/fimmu.2021.733921
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34858397!8631967!34858397
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suck abstract from ncbi

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  • Metformin Suppresses Monocyte Immunometabolic Activation by SARS-CoV-2 Spike Protein Subunit 1 #MMPMID34858397
  • Cory TJ; Emmons RS; Yarbro JR; Davis KL; Pence BD
  • Front Immunol 2021[]; 12 (ä): 733921 PMID34858397show ga
  • A hallmark of COVID-19 is a hyperinflammatory state associated with severity. Monocytes undergo metabolic reprogramming and produce inflammatory cytokines when stimulated with SARS-CoV-2. We hypothesized that binding by the viral spike protein mediates this effect, and that drugs which regulate immunometabolism could inhibit the inflammatory response. Monocytes stimulated with recombinant SARS-CoV-2 spike protein subunit 1 showed a dose-dependent increase in glycolytic metabolism associated with production of pro-inflammatory cytokines. This response was dependent on hypoxia-inducible factor-1alpha, as chetomin inhibited glycolysis and cytokine production. Inhibition of glycolytic metabolism by 2-deoxyglucose (2-DG) or glucose deprivation also inhibited the glycolytic response, and 2-DG strongly suppressed cytokine production. Glucose-deprived monocytes rescued cytokine production by upregulating oxidative phosphorylation, an effect which was not present in 2-DG-treated monocytes due to the known effect of 2-DG on suppressing mitochondrial metabolism. Finally, pre-treatment of monocytes with metformin strongly suppressed spike protein-mediated cytokine production and metabolic reprogramming. Likewise, metformin pre-treatment blocked cytokine induction by SARS-CoV-2 strain WA1/2020 in direct infection experiments. In summary, the SARS-CoV-2 spike protein induces a pro-inflammatory immunometabolic response in monocytes that can be suppressed by metformin, and metformin likewise suppresses inflammatory responses to live SARS-CoV-2. This has potential implications for the treatment of hyperinflammation during COVID-19.
  • |COVID-19/*immunology[MESH]
  • |Cells, Cultured[MESH]
  • |Humans[MESH]
  • |Metformin/*pharmacology[MESH]
  • |Monocytes/*drug effects/*immunology[MESH]
  • |SARS-CoV-2/*immunology[MESH]
  • |Spike Glycoprotein, Coronavirus/*immunology[MESH]


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  • suck abstract from ncbi

    733921 ä.12 2021