RE: EIDD-28019 Feb 2021 16:05
Thanks Borsaci06. This is Mercks new antiviral, probably SNGs biggest 'competitor'
This is an in vivo study, ie how the drug performs in the human lung and results looks to be very good at early stage. So looks like a real deal. However the surprise in this study is what could be the cause of such stellar results.
'Notably, numerous interferon-stimulated genes (ISGs) and inflammatory cytokine genes, including pro-inflammatory cytokines genes IL6, CXCL8 (IL-8), CXCL10(IP-10), TNF, and CCL5 (RANTES) were potently induced in infected lung tissue (Supplementary Tables 1 and 2). We also observed dramatic upregulation of IFNB1, IFNL1, IFNL2, and IFNL3 expression (>1,000 fold for all) at 2 days post-exposure, suggesting that these cytokines play a key role in the antiviral response to SARS-CoV-2 (Supplementary Tables 1 and 2). Gene set enrichment analysis (GSEA) showed over 840 gene pathways significantly upregulated (p<0.05) including response to type 1 interferon (p=0.0011), response to virus (p=0.0010), innate immune response (p=0.0010), cytokine mediated signaling (p=0.0010), cytokine production (p=0.0010)'
We observed robust induction of IFNB1 expression during acute infection followed by a decline in expression. Interestingly, an analysis of post-mortem COVID-19 patient lungs5 did not reveal increased IFNB1 expression and it has been shown in vitro that its expression is blocked during SARS-CoV infection31,32. These results suggest that in human lung tissue IFNB1 expression is induced during acute SARS-CoV-2 infection. While this study was not designed to evaluate the effect of type I IFN on SARS-CoV-2 replication in vivo, in vitro studies and in vivo mousestudies showed that type I IFN treatment restricts SARS-CoV-2 replication7,33.