Journal: EBioMedicine
Article Title: AI-guided discovery of the invariant host response to viral pandemics.
doi: 10.1016/j.ebiom.2021.103390
Figure Lengend Snippet: Fig. 7. Lung alveolar cells contribute to the IL15 storm in fatal COVID-19. (a) Normal lung tissue obtained during surgical resection (left) or lung tissue obtained during autopsy stud- ies on COVID-19 patients (right) were stained for IL15 and IL15RA. Representative images are shown. Mag = 10X. (b) Violin plots display the intensity of staining for IL15RA (top) and IL15 (bottom), as determined by IHC profiler. (c) Hospital-free days analysis (45 days followup) of COVID-19 patients (GSE157103) limited to males less than 70 years old using the abundance of IL15 transcripts (intermediate and high groups) is displayed as Kaplan-Meier estimates (left) of cumulative probability of discharge and its relationship with days in hospital. (d) Cox-proportional hazard univariate analysis (right; top) of sViP (high vs low) is compared to ViP signature, Interferon Stimulated Gene-signatures (ISG1, PMID:15619625; ISG2, PMID:21478870), age, gender, ICU admission (icu) and mechanical ventilation (mv). Multivariate Cox-proportional hazard analysis (right; bottom) compares the variables that are significant in univariate settings, i.e., sViP, ICU admission (icu) and mechanical ventilation (mv). (e) Top: Schematic displays the workflow for patient blood col- lection and assessment of IL15 levels by mesoscale. Bottom: Bar (top) and violin (bottom) plots for the levels of IL15 cytokine (score = Z score of the log reduced mesoscale concentra- tion data). ROC AUC numbers indicate the strength of classification between patients with critical/fatal disease course vs. those with non-critical infection. (f) Summary of IL15 signaling and the hypothetical role of NK cells in the severity of COVID-19 infections.
Article Snippet: Tissues were then incubated with rabbit IL15RA polyclonal antibody (1:200 dilution; proteintech , Rosemont, IL, USA; catalog# 16,744 1-AP) for 1.5 h and mouse IL15 monoclonal antibody (1:10 dilution; Santa Cruz Biotechnology, Inc., Dallas, TX, USA; catalog# sc-8437) at room temperature in a humidified chamber and then rinsed with TBS or PBS 3x, 5 min each.
Techniques: Staining, Infection