Fig. 3. Pattern of T cell infiltration in low-dose irradiated, vector-injected muscle is significantly different from non-irradiated, vector-injected muscle.

Infiltrating CD4⁺ and CD8⁺ T cells were examined by immunohistochemistry in treated and control muscles at week 4, 8, and 12 post-treatment. This figure shows a representative image of week 8 analysis. Arrows indicate single or multiple muscle fibers surrounded with infiltrating T cells.