Extended Data Fig. 1. General stromal features of thymic aging.
a, Thymic cellularity of female C57BL/6 mice at 2, 6, 9, 12 or 19+ months of age. b-c, Representative images of hematoxylin and eosin (H&E) stained mouse thymi from 2, 6, 8-9, 13, and 19+mo female C57BL/6 mice (b) used to calculate ratio of cortical (dark) to medullary (light) region (c). In (c), each dot represents a biological replicate. d, Flow cytometric analysis of enzymatically digested thymus and absolute cell numbers for major cell types (TECs; cTECs and mTECs; ECs and FBs) in 2, 6, 9, 12, and 18+ mo female C57BL/6 mice. Summary data represents mean ± SEM; each dot represents an individual biological replicate; statistics were generated for a, c, and d using one-way ANOVA with the Dunnett correction for multiple comparisons.