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10.15252/embj.2021108249

http://scihub22266oqcxt.onion/10.15252/embj.2021108249
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34296442!8420271!34296442
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suck abstract from ncbi


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pmid34296442      EMBO+J 2021 ; 40 (18): e108249
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  • SARS-CoV-2 nucleocapsid suppresses host pyroptosis by blocking Gasdermin D cleavage #MMPMID34296442
  • Ma J; Zhu F; Zhao M; Shao F; Yu D; Ma J; Zhang X; Li W; Qian Y; Zhang Y; Jiang D; Wang S; Xia P
  • EMBO J 2021[Sep]; 40 (18): e108249 PMID34296442show ga
  • SARS-CoV-2 is an emerging coronavirus that causes dysfunctions in multiple human cells and tissues. Studies have looked at the entry of SARS-CoV-2 into host cells mediated by the viral spike protein and human receptor ACE2. However, less is known about the cellular immune responses triggered by SARS-CoV-2 viral proteins. Here, we show that the nucleocapsid of SARS-CoV-2 inhibits host pyroptosis by blocking Gasdermin D (GSDMD) cleavage. SARS-CoV-2-infected monocytes show enhanced cellular interleukin-1beta (IL-1beta) expression, but reduced IL-1beta secretion. While SARS-CoV-2 infection promotes activation of the NLRP3 inflammasome and caspase-1, GSDMD cleavage and pyroptosis are inhibited in infected human monocytes. SARS-CoV-2 nucleocapsid protein associates with GSDMD in cells and inhibits GSDMD cleavage in vitro and in vivo. The nucleocapsid binds the GSDMD linker region and hinders GSDMD processing by caspase-1. These insights into how SARS-CoV-2 antagonizes cellular inflammatory responses may open new avenues for treating COVID-19 in the future.
  • |Angiotensin-Converting Enzyme 2/immunology/metabolism[MESH]
  • |Animals[MESH]
  • |COVID-19/immunology/*metabolism/pathology/virology[MESH]
  • |Caspase 1/immunology/metabolism[MESH]
  • |HEK293 Cells[MESH]
  • |Host-Pathogen Interactions[MESH]
  • |Humans[MESH]
  • |Inflammasomes/immunology/metabolism[MESH]
  • |Interleukin-1beta/immunology/metabolism[MESH]
  • |Intracellular Signaling Peptides and Proteins/immunology/*metabolism[MESH]
  • |Mice[MESH]
  • |Monocytes/metabolism[MESH]
  • |NLR Family, Pyrin Domain-Containing 3 Protein/immunology/metabolism[MESH]
  • |Nucleocapsid/*metabolism[MESH]
  • |Phosphate-Binding Proteins/immunology/*metabolism[MESH]
  • |Pyroptosis/*physiology[MESH]
  • |SARS-CoV-2/immunology/*metabolism[MESH]
  • |Spike Glycoprotein, Coronavirus/immunology/metabolism[MESH]


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