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10.1111/bph.15304

http://scihub22266oqcxt.onion/10.1111/bph.15304
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33125711!9328389!33125711
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suck abstract from ncbi


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pmid33125711      Br+J+Pharmacol 2021 ; 178 (3): 626-635
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  • Unfractionated heparin inhibits live wild type SARS-CoV-2 cell infectivity at therapeutically relevant concentrations #MMPMID33125711
  • Tree JA; Turnbull JE; Buttigieg KR; Elmore MJ; Coombes N; Hogwood J; Mycroft-West CJ; Lima MA; Skidmore MA; Karlsson R; Chen YH; Yang Z; Spalluto CM; Staples KJ; Yates EA; Gray E; Singh D; Wilkinson T; Page CP; Carroll MW
  • Br J Pharmacol 2021[Feb]; 178 (3): 626-635 PMID33125711show ga
  • BACKGROUND AND PURPOSE: Currently, there are no licensed vaccines and limited antivirals for the treatment of COVID-19. Heparin (delivered systemically) is currently used to treat anticoagulant anomalies in COVID-19 patients. Additionally, in the United Kingdom, Brazil and Australia, nebulised unfractionated heparin (UFH) is being trialled in COVID-19 patients as a potential treatment. A systematic comparison of the potential antiviral effect of various heparin preparations on live wild type SARS-CoV-2, in vitro, is needed. EXPERIMENTAL APPROACH: Seven different heparin preparations including UFH and low MW heparins (LMWH) of porcine or bovine origin were screened for antiviral activity against live SARS-CoV-2 (Australia/VIC01/2020) using a plaque inhibition assay with Vero E6 cells. Interaction of heparin with spike protein RBD was studied using differential scanning fluorimetry and the inhibition of RBD binding to human ACE2 protein using elisa assays was examined. KEY RESULTS: All the UFH preparations had potent antiviral effects, with IC(50) values ranging between 25 and 41 mug.ml(-1) , whereas LMWHs were less inhibitory by ~150-fold (IC(50) range 3.4-7.8 mg.ml(-1) ). Mechanistically, we observed that heparin binds and destabilizes the RBD protein and furthermore, we show heparin directly inhibits the binding of RBD to the human ACE2 protein receptor. CONCLUSION AND IMPLICATIONS: This comparison of clinically relevant heparins shows that UFH has significantly stronger SARS-CoV-2 antiviral activity compared to LMWHs. UFH acts to directly inhibit binding of spike protein to the human ACE2 protein receptor. Overall, the data strongly support further clinical investigation of UFH as a potential treatment for patients with COVID-19.
  • |Angiotensin-Converting Enzyme 2/metabolism[MESH]
  • |Animals[MESH]
  • |Antiviral Agents/pharmacology[MESH]
  • |COVID-19 Drug Treatment[MESH]
  • |Chlorocebus aethiops[MESH]
  • |Heparin, Low-Molecular-Weight/pharmacology[MESH]
  • |Heparin/metabolism/*pharmacology/therapeutic use[MESH]
  • |Protein Binding/drug effects[MESH]
  • |SARS-CoV-2/*growth & development[MESH]
  • |Spike Glycoprotein, Coronavirus/metabolism[MESH]


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