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10.1016/j.fct.2021.112009

http://scihub22266oqcxt.onion/10.1016/j.fct.2021.112009
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33503469!7830272!33503469
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suck abstract from ncbi


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pmid33503469      Food+Chem+Toxicol 2021 ; 149 (ä): 112009
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  • Nicotinic cholinergic system and COVID-19: In silico identification of interactions between alpha7 nicotinic acetylcholine receptor and the cryptic epitopes of SARS-Co-V and SARS-CoV-2 Spike glycoproteins #MMPMID33503469
  • Lagoumintzis G; Chasapis CT; Alexandris N; Kouretas D; Tzartos S; Eliopoulos E; Farsalinos K; Poulas K
  • Food Chem Toxicol 2021[Mar]; 149 (ä): 112009 PMID33503469show ga
  • SARS-CoV-2 is the coronavirus that originated in Wuhan in December 2019 and has spread globally. Studies have shown that smokers are less likely to be diagnosed with or be hospitalized for COVID-19 but, once hospitalized, have higher odds for an adverse outcome. We have previously presented the potential interaction between SARS-CoV-2 Spike glycoprotein and nicotinic acetylcholine receptors (nAChRs), due to a "toxin-like" epitope on the Spike glycoprotein, with homology to a sequence of a snake venom toxin. This epitope coincides with the well-described cryptic epitope for the human anti-SARS-CoV antibody CR3022. In this study, we present the molecular complexes of both SARS-CoV and SARS-CoV-2 Spike glycoproteins, at their open or closed conformations, with the model of the human alpha7 nAChR. We found that all studied protein complexes' interface involves a large part of the "toxin-like" sequences of SARS-CoV and SARS-CoV-2 Spike glycoproteins and toxin binding site of human alpha7 nAChR. Our findings provide further support to the hypothesis about the protective role of nicotine and other cholinergic agonists. The potential therapeutic role of CR3022 and other similar monoclonal antibodies with increased affinity for SARS-CoV-2 Spike glycoprotein against the clinical effects originating from the dysregulated cholinergic pathway should be further explored.
  • |*Epitopes[MESH]
  • |Amino Acid Sequence[MESH]
  • |Antibodies, Monoclonal/chemistry/therapeutic use[MESH]
  • |Antibodies, Viral/chemistry/therapeutic use[MESH]
  • |Binding Sites, Antibody[MESH]
  • |COVID-19/metabolism/prevention & control/*virology[MESH]
  • |Humans[MESH]
  • |Models, Molecular[MESH]
  • |Nicotine/*pharmacology[MESH]
  • |Nicotinic Agonists/chemistry/therapeutic use[MESH]
  • |Non-Neuronal Cholinergic System[MESH]
  • |Pandemics[MESH]
  • |Protective Factors[MESH]
  • |Protein Conformation[MESH]
  • |SARS-CoV-2/*chemistry[MESH]
  • |Sequence Homology[MESH]
  • |Severe acute respiratory syndrome-related coronavirus/*chemistry[MESH]
  • |Signal Transduction[MESH]
  • |Smokers[MESH]
  • |Smoking[MESH]
  • |Snake Venoms/chemistry[MESH]
  • |Spike Glycoprotein, Coronavirus/*chemistry[MESH]


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