Figure 2. Aged Treg display the transcriptional signature of “effector” Treg.
Splenocytes from young (3–5months) and old (>18months) FoxP3-IRES-GFP reporter mice were sorted for CD25hi Treg (CD4+ FoxP3GFP+ CD25hi), CD25lo Treg (CD4+ FoxP3GFP+ CD25lo), memory CD4+ T cells (CD4+ FoxP3GFP− CD44hi CD62Llo), and naïve CD4+ T cells (CD4+ FoxP3GFP− CD44lo CD62Lhi), and the isolated RNA was sent for NextGeneration RNA sequencing. A, Heatmaps show the relative gene expression. B, Principle component analysis is shown.