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10.1038/s41598-021-01217-2

http://scihub22266oqcxt.onion/10.1038/s41598-021-01217-2
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34741071!8571314!34741071
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suck abstract from ncbi


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pmid34741071      Sci+Rep 2021 ; 11 (1): 21725
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  • Diosmectite inhibits the interaction between SARS-CoV-2 and human enterocytes by trapping viral particles, thereby preventing NF-kappaB activation and CXCL10 secretion #MMPMID34741071
  • Poeta M; Cioffi V; Buccigrossi V; Nanayakkara M; Baggieri M; Peltrini R; Amoresano A; Magurano F; Guarino A
  • Sci Rep 2021[Nov]; 11 (1): 21725 PMID34741071show ga
  • SARS-CoV-2 enters the intestine by the spike protein binding to angiotensin-converting enzyme 2 (ACE2) receptors in enterocyte apical membranes, leading to diarrhea in some patients. Early treatment of COVID-19-associated diarrhea could relieve symptoms and limit viral spread within the gastrointestinal (GI) tract. Diosmectite, an aluminomagnesium silicate adsorbent clay with antidiarrheal effects, is recommended in some COVID-19 management protocols. In rotavirus models, diosmectite prevents pathogenic effects by binding the virus and its enterotoxin. We tested the trapping and anti-inflammatory properties of diosmectite in a SARS-CoV-2 model. Trapping effects were tested in Caco-2 cells using spike protein receptor-binding domain (RBD) and heat-inactivated SARS-CoV-2 preparations. Trapping was assessed by immunofluorescence, alone or in the presence of cells. The effect of diosmectite on nuclear factor kappa B (NF-kappaB) activation and CXCL10 secretion induced by the spike protein RBD and heat-inactivated SARS-CoV-2 were analyzed by Western blot and ELISA, respectively. Diosmectite bound the spike protein RBD and SARS-CoV-2 preparation, and inhibited interaction of the spike protein RBD with ACE2 receptors on the Caco-2 cell surface. Diosmectite exposure also inhibited NF-kappaB activation and CXCL10 secretion. These data provide direct evidence that diosmectite can bind SARS-CoV-2 components and inhibit downstream inflammation, supporting a mechanistic rationale for consideration of diosmectite as a management option for COVID-19-associated diarrhea.
  • |*COVID-19 Drug Treatment[MESH]
  • |*SARS-CoV-2[MESH]
  • |Adsorption[MESH]
  • |Aluminum Compounds/chemistry[MESH]
  • |Angiotensin-Converting Enzyme 2/metabolism[MESH]
  • |Anti-Inflammatory Agents[MESH]
  • |Binding Sites[MESH]
  • |Caco-2 Cells[MESH]
  • |Chemokine CXCL10/*metabolism[MESH]
  • |Chromatography, Liquid[MESH]
  • |Clay[MESH]
  • |Diarrhea/etiology/therapy[MESH]
  • |Enterocytes/metabolism[MESH]
  • |Gastroenterology[MESH]
  • |Humans[MESH]
  • |Magnesium Compounds/chemistry[MESH]
  • |Mass Spectrometry[MESH]
  • |Molecular Docking Simulation[MESH]
  • |Molecular Dynamics Simulation[MESH]
  • |NF-kappa B p50 Subunit/*metabolism[MESH]
  • |Protein Binding/drug effects[MESH]
  • |Protein Domains[MESH]
  • |Rotavirus[MESH]


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