R-sIL-7gly injection induces T-cell homing into organs. Rhesus macaques injected with R-sIL-7gly (80 μg/kg) were killed at D1 (left pictures) and compared with untreated animals (right pictures). CD3⁺ cells were identified by immunohistochemistry in skin (A), jejunum (B), ileum (C), colon (D), rectum (E), and lymph node (F) samples. Magnification: ×100. CD3⁺ T-cell quantifications, performed on 7 to 10 fields (0.09 mm²) randomly selected from 4 slides for each organ in macaques killed at H0, H24, and D7 after R-sIL-7gly injection, are shown on the right. Statistical differences between H0 and either H24 or D7 are shown on top (Mann-Whitney test).