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10.1111/sji.13102

http://scihub22266oqcxt.onion/10.1111/sji.13102
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34755902!8646999!34755902
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suck abstract from ncbi


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pmid34755902      Scand+J+Immunol 2021 ; 94 (5): e13102
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  • Perforin, COVID-19 and a possible pathogenic auto-inflammatory feedback loop #MMPMID34755902
  • Cunningham L; Kimber I; Basketter D; Simmonds P; McSweeney S; Tziotzios C; McFadden JP
  • Scand J Immunol 2021[Nov]; 94 (5): e13102 PMID34755902show ga
  • During COVID-19 infection, reduced function of natural killer (NK) cells can lead to both compromised viral clearance and dysregulation of the immune response. Such dysregulation leads to overproduction of cytokines, a raised neutrophil/lymphocyte ratio and monocytosis. This in turn increases IL-6 expression, which promotes scar and thrombus formation. Excess IL-6 also leads to a further reduction in NK function through downregulation of perforin expression, therefore forming a pathogenic auto-inflammatory feedback loop. The perforin/granzyme system of cytotoxicity is the main mechanism through which NK cells and cytotoxic T lymphocytes eliminate virally infected host cells, as well as being central to their role in regulating immune responses to microbial infection. Here, we present epidemiological evidence suggesting an association between perforin expression and resistance to COVID-19. In addition, we outline the manner in which a pathogenic auto-inflammatory feedback loop could operate and the relationship of this loop to genes associated with severe COVID-19. Such an auto-inflammatory loop may be amenable to synergistic multimodal therapy.
  • |Animals[MESH]
  • |Autoimmunity/genetics[MESH]
  • |COVID-19/epidemiology/*immunology[MESH]
  • |Cytokine Release Syndrome/epidemiology/*immunology[MESH]
  • |Disease Resistance[MESH]
  • |Humans[MESH]
  • |Interleukin-6/metabolism[MESH]
  • |Killer Cells, Natural/*immunology[MESH]
  • |Lymphohistiocytosis, Hemophagocytic/epidemiology/*immunology[MESH]
  • |Neutrophils/*immunology[MESH]
  • |Perforin/genetics/*metabolism[MESH]


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