TNF-α, INF-γ, MCP-1, and RANTES protein levels were measured in the BAL of non-depleted (closed circles), CD4-depleted (open circles), and CD8-depleted (closed triangles) IRD mice. Each data point represents the arithmetic mean of the combined data of three independent experiments ± 1 SEM. (n> 7 mice for each data point except CD4-depleted mice at day 21 (n= 3)). *P<0.05 as compared to non-depleted IRD mice.