Journal: Nature Communications
Article Title: A basally active cGAS-STING pathway limits SARS-CoV-2 replication in a subset of ACE2 positive airway cell models
doi: 10.1038/s41467-024-52803-7
Figure Lengend Snippet: a , b SCC25, H596, OE21, Detroit 562, and Calu-3 cells were pretreated with 1 μM ruxolitinib for 24 h. IFIT1 ( a ) and MX1 ( b ) expression were analyzed by RT-qPCR, and expression levels are shown relative to untreated Calu-3 cells (set to 1). Data show the mean from n = 2 (H596 and Calu-3) and 4 (other cells) independent biological replicates, error bars show the SEM. c SCC25, H596, OE21, and Detroit 562 cells were pretreated with DMSO (mock) or 1 μM ruxolitinib for 24 h and infected with SARS-CoV-2 at a MOI of 2 i.u./cell in the presence of DMSO or 1 μM ruxolitinib. RT-qPCR analysis shows cell-associated viral RNA levels at 72 hpi. Data show the mean from n = 4 independent replicates, error bars show the SEM. d–g Polyclonal populations of SCC25 cells knocked out (KO) for IFNAR ( d ) or STAT1 ( e ) using two independent sgRNAs or transduced with a non-targeting (NT) control and SCC25 cells transfected with 3 separate siRNAs targeting STAT2 ( f ), IRF9 ( g ), or a non-targeting control (NT) were infected with SARS-CoV-2 at a MOI of 2 i.u./cell. Cell-associated viral RNA was analyzed by RT-qPCR at 72 hpi. Y-axes indicate the relative expression ratio between knockdown (KD) or knockout (KO) and the respective NT samples. Data display the mean of n = 5 ( d , e ) and n = 6 ( f , g ) independent replicates, error bars denote the SEM. Source data are provided as a Source Data file.
Article Snippet: After washing with PBST, samples were incubated in a goat anti-mouse secondary antibody conjugated to Alexa Fluor Plus 488 (Invitrogen, Cat# A-11029, 1:1000) at room temperature for 1 h. IFIT3, IFIT2, ISG15 and STING were detected by incubation with a primary rabbit polyclonal IFIT3 antibody (Novus Biologicals NBP2-32500, 1:500), rabbit polyclonal IFIT2 antibody (Novus Biologicals NBP2-15180SS, 1:500), rabbit polyclonal ISG15 antibody (Proteintech 15981-1-AP, 1:250) and rabbit polyclonal STING antibody (Proteintech 19851-1-AP, 1:200) respectively as described above followed by incubation with a goat anti-rabbit fluorescent secondary antibody (Invitrogen Goat anti-Rabbit Alexa Fluor Plus 568TM, Cat# A-11036, 1:1000 or Invitrogen Goat anti-Rabbit Alexa FluorTM Plus 647, Catalog # A32733TR, 1:1000).
Techniques: Expressing, Quantitative RT-PCR, Infection, Transduction, Control, Transfection, Knockdown, Knock-Out