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. 2023 Feb 8;14:1127515. doi: 10.3389/fimmu.2023.1127515

Figure 5.

Figure 5

rP18tri-based TB vaccines induced multifunctional CD4 T cells. (A) BL6 mice (N=5) were immunized with rP18tri vector (V), TBvac-2, and TBvac-10 through IN-IN prime-boost strategy. At 7 dpb, PBMCs were collected and incubated in medium only or with pooled Ag85B/ESAT6 antigens, and stained for cell surface markers and cytokines. Representative flow cytometry plots of CD4 T cells (CD44hCD4+CD3+) positive for dual cytokine expression (IFNγ/IL-2, IFNγ/TNFα, and IL-2/TNFα) after either medium or peptide stimulation were shown for each immunization group (B). After normalization with the medium control, the average percentages of dual- and triple-positive (IFNγ/IL-2/TNFα) CD4 T cells after peptide stimulation were shown for each group (C). *p<0.05.