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Vitamin D and lumisterol novel metabolites can inhibit SARS-CoV-2 replication machinery enzymes

Qayyum et al., Endocrinology and Metabolism, doi:10.1152/ajpendo.00174.2021
Jul 2021  
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In Silico analysis showing that vitamin D and lumisterol metabolites may inhibit SARS-CoV-2 Mpro and RdRP.
Qayyum et al., 27 Jul 2021, peer-reviewed, 7 authors.
In Silico studies are an important part of preclinical research, however results may be very different in vivo.
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Vitamin D and lumisterol novel metabolites can inhibit SARS-CoV-2 replication machinery enzymes
Shariq Qayyum, Taj Mohammad, Radomir M Slominski, Md Imtaiyaz Hassan, Robert C Tuckey, Chander Raman, Andrzej T Slominski
American Journal of Physiology-Endocrinology and Metabolism, doi:10.1152/ajpendo.00174.2021
Vitamin D deficiency significantly correlates with the severity of SARS-CoV-2 infection. Molecular docking-based virtual screening studies predict that novel vitamin D and related lumisterol hydroxymetabolites are able to bind to the active sites of two SARS-CoV-2 transcription machinery enzymes with high affinity. These enzymes are the main protease (M pro ) and RNA-dependent RNA polymerase (RdRP), which play important roles in viral replication and establishing infection. Based on predicted binding affinities and specific interactions, we identified 10 vitamin D3 (D3) and lumisterol (L3) analogs as likely binding partners of SARS-CoV-2 M pro and RdRP and, therefore, tested their ability to inhibit these enzymes. Activity measurements demonstrated that 25 (OH)L3, 24(OH)L3, and 20(OH)7DHC are the most effective of the hydroxymetabolites tested at inhibiting the activity of SARS-CoV-2 M pro causing 10%-19% inhibition. These same derivatives as well as other hydroxylumisterols and hydroxyvitamin D3 metabolites inhibited RdRP by 50%-60%. Thus, inhibition of these enzymes by vitamin D and lumisterol metabolites may provide a novel approach to hindering the SARS-CoV-2 infection. NEW & NOTEWORTHY Active forms of vitamin D and lumisterol can inhibit SARS-CoV-2 replication machinery enzymes, which indicates that novel vitamin D and lumisterol metabolites are candidates for antiviral drug research.
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