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. 2017 Sep 13;7:11500. doi: 10.1038/s41598-017-11738-4

Figure 4.

Figure 4

CTLA4 regulates Aspergillus-induced regulatory T-cells with aTH17-like phenotype. (A) Percentage of CTLA4 expressing CD4+ T-cells and Mean fluorescence intensity (MFI) of CTLA4 staining following stimulation of human PBMCs (n = 13 donors) with heat-inactivated A. fumigatus conidia (1 × 107/mL), 10 µg/mL P3C or a combination of both. (B) IL-17A concentration in culture supernatants of human PBMCs (n = 6 donors) stimulated with heat-inactivated A. fumigatus conidia (1 × 107/mL) after 1 hour pre-incubation with 24 µg/mL Abatacept, or CoIgG. (C) Regulatory T-cell (CD25+FoxP3+) induction after 7 days in human PBMCs (n = 7 donors) stimulated with heat-inactivated A. fumigatus conidia (1 × 107/mL) after 1 hour pre-incubation with 24 µg/mL Abatacept, or CoIgG. TH17 cell (IL-17A + ) induction after 7 days in human PBMCs stimulated with heat- inactivated A. fumigatus conidia (1 × 107/mL) after 1 hour pre-incubation with 24 µg/mL Abatacept, or CoIgG. IL-17A+ regulatory T-cell induction after 7 days in human PBMCs stimulated with heat- inactivated A. fumigatus conidia (1 × 107/mL) after 1 hour pre-incubation with 24 µg/mL Abatacept, or CoIgG. Data are represented as mean ± SEM. Abbreviations: P3C = Pam3Cys-SKKKK; Af = Aspergillus fumigatus; CoIgG = Control immunoglobulin G. *p-value ≤ 0.05, **p-value ≤ 0.01,***p-value ≤ 0.001.