Journal: Nature Communications
Article Title: Aiolos restricts the generation of antigen-inexperienced, virtual memory CD8 + T cells in mice
doi: 10.1038/s41467-025-67540-8
Figure Lengend Snippet: Analysis of Eomes expression in CD8 + T cells isolated from the spleens of uninfected WT and Ikzf3 -/- mice. a Representative flow contour plots depicting expression of Eomes in WT and Ikzf3 -/- CD8 + T cells; and b respective bar graphs showing percent (%) of Eomes + and numbers of Eomes-expressing CD8 + T cells (# counts, normalized to 6 × 10 5 events). c Representative histogram overlay for Eomes expression and associated data showing differences in median fluorescence intensity (MFI) fold change relative to WT control. For ( a – c ), data shown for 4 independent experiments, n = 14/group, mean ± SEM, two-sided, unpaired Student’s t-test, ****p ≤ 0.0001. d Representative flow plots and e associated bar graphs showing percent (%) of CD122 + and numbers of CD122-expressing CD8 + T cells (#: counts, normalized to 6 × 10 5 events), Data shown for 3 independent experiments, n = 11/group, mean ± SEM, two-sided, unpaired Student’s t-test, ****p ≤ 0.0001. f Analysis of publicly available Aiolos Chromatin Immunoprecipitation (ChIP)-Seq data (GSM5106065) and STAT5b ChIP-Seq data (GSM7887512) showing enrichment of Aiolos and STAT5b at the Eomes promoter region. Sequencing tracks were viewed using Integrative Genomics Viewer. The gene region cloned into a reporter vector for Eomes promoter activity is indicated. g , h EL4 T cells were transfected with an Eomes promoter-reporter construct in conjunction with vectors for Aiolos, Aiolos DNA binding mutant (Aiolos DBM) , constitutively active STAT5b (STAT5b CA ), or empty vector control. As a control for transfection efficiency, cells were concurrently transfected with SV40- Renilla , and luciferase activity was used as a readout for promoter activity. Luciferase promoter-reporter values were normalized to SV40- Renilla control and presented as relative to the empty vector. Immunoblot analysis of the indicated proteins confirming the overexpression of respective vectors. β-actin was used as a loading control. Data are representative of 4 independent experiments, n = 4/condition, mean ± SEM, one-way ANOVA with Tukey’s multiple comparisons test, *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001, and ****p ≤ 0.0001. Source data are provided as a file.
Article Snippet: The EL4 murine T cell lymphoma line (TIB-39) for transfection studies and YAC-1 cells (TIB-160) for cytotoxicity were acquired from the American Type Culture Collection (ATCC) and maintained in complete RPMI (RPMI media [catalog # 61870-036, Thermo Fisher Scientific] containing 10% FBS [catalog # 26140-079, Life Technologies] and 1% penicillin/streptomycin [catalog # 15140-122, Life Technologies]).
Techniques: Expressing, Isolation, Fluorescence, Control, Chromatin Immunoprecipitation, ChIP-sequencing, Sequencing, Clone Assay, Plasmid Preparation, Activity Assay, Transfection, Construct, Binding Assay, Mutagenesis, Luciferase, Western Blot, Over Expression