Regulatory T Cells Accumulate in the Lung Allergic Inflammation and Efficiently Suppress T-Cell Proliferation but Not Th2 Cytokine Production

Figure 3

Regulatory T cells accumulate in the airways of allergic but not tolerant mice. Time course of (a) CD4⁺CD25⁺Foxp3⁺ (Treg) and (b) CD4⁺CD25⁺Foxp3⁻ (Teff) cells number in the BAL of allergic and tolerant mice. (c) Frequency and (d) number of CD4⁺CD25⁺ lung cells expressing or not Foxp3. Pooled cells from three mice recovered from BAL and lung were stained for CD4, CD25, and Foxp3 and gated in CD4-positive cells. Values in (a) and (b) represent the means ± SEM for groups of three mice and are representative of two experiments. The data in (c) show a representative experiment of two. Significant differences **𝑃<0.01, ***𝑃<0.001 are related to tolerant group.

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