Figure 2Comparison of CD107a expression levels between various NK cell subsets after co-incubation with either no target cells present (-), autologous CD4 T cells (Mock), or enriched in vitro HIV-1-infected (NL4-3) CD4 T cells (HIV) (n = 13 different donors per condition). Predefined NK cell subsets comprise CD56Dim, CD56Bright, KIR-educated cells, defined as expressing at least one self-inhibitory KIR (2DL1/L2/L3, 3DL1) and negative for NKG2A, NKG2A-educated cells, expressing NKG2A but lacking self-inhibitory KIR, and uneducated cells, lacking self-inhibitory KIR and NKG2A altogether. (A) Relative frequency of CD107a+ cells (y-axis) of predefined NK cell subsets (x-axis). Left panel displays data for bulk NK cells, middle panel for CD56Dim and CD56Bright NK cells, right panel for uneducated, KIR-educated and NKG2A-educated cells (n = 13 different donors). Data information: Wilcoxon signed-rank test adjusted for multiple comparisons (Bonferroni). Box plots represent the median and 25%/75% percentile. Whiskers indicate the minimum and maximum data points.Comparison of CD107a expression levels between various NK cell subsets after co-incubation with either no target cells present (-), autologous CD4 T cells (Mock), or enriched in vitro HIV-1-infected (NL4-3) CD4 T cells (HIV) (n = 13 different donors per condition). Predefined NK cell subsets comprise CD56Dim, CD56Bright, KIR-educated cells, defined as expressing at least one self-inhibitory KIR (2DL1/L2/L3, 3DL1) and negative for NKG2A, NKG2A-educated cells, expressing NKG2A but lacking self-inhibitory KIR, and uneducated cells, lacking self-inhibitory KIR and NKG2A altogether. (B) HIV-specific responses of predefined NK cell sub-populations (x-axis) displayed as percentage points (p.p.) CD107a+ NK cells after normalization to mock CD4 T cells (y-axis) (n = 13 different donors). Data information: Wilcoxon signed-rank test adjusted for multiple comparisons (Bonferroni). Box plots represent the median and 25%/75% percentile. Whiskers indicate the minimum and maximum data points.Comparison of TRAIL expression levels between various NK cell subsets after co-incubation with either no target cells present (-), autologous CD4 T cells (Mock), or enriched in vitro HIV-1-infected (NL4-3) CD4 T cells (HIV) (n = 13 different donors per condition). Predefined NK cell subsets comprise CD56Dim, CD56Bright, KIR-educated cells, defined as expressing at least one self-inhibitory KIR (2DL1/L2/L3, 3DL1) and negative for NKG2A, NKG2A-educated cells, expressing NKG2A but lacking self-inhibitory KIR, and uneducated cells, lacking self-inhibitory KIR and NKG2A altogether. (C) TRAIL expression levels (y-axis) of predefined NK cell subsets (x-axis). Left panel displays data for bulk NK cells, middle panel for CD56Dim and CD56Bright NK cells, right panel for uneducated, KIR-educated and NKG2A-educated cells. Expression is displayed as median fluorescence intensity (MdFI) (n = 13 different donors). Data information: Wilcoxon signed-rank test adjusted for multiple comparisons (Bonferroni). Box plots represent the median and 25%/75% percentile. Whiskers indicate the minimum and maximum data points.Comparison of TRAIL expression levels between various NK cell subsets after co-incubation with either no target cells present (-), autologous CD4 T cells (Mock), or enriched in vitro HIV-1-infected (NL4-3) CD4 T cells (HIV) (n = 13 different donors per condition). Predefined NK cell subsets comprise CD56Dim, CD56Bright, KIR-educated cells, defined as expressing at least one self-inhibitory KIR (2DL1/L2/L3, 3DL1) and negative for NKG2A, NKG2A-educated cells, expressing NKG2A but lacking self-inhibitory KIR, and uneducated cells, lacking self-inhibitory KIR and NKG2A altogether. (D) Comparison of TRAIL expression levels (y-axis) between CD107a- and CD107a+ cells of predefined NK cell subsets. Left panel displays data for bulk NK cells, middle panel for CD56Dim and CD56Bright NK cells, right panel for uneducated, KIR-educated and NKG2A-educated cells. Expression is displayed as MdFI. (n = 13 different donors). (E) Fold-differences in TRAIL surface expression (y-axis) between CD107a+ and CD107a- cells of pre-defined NK cell sub-populations (x-axis). (n = 13 different donors). Data information: Wilcoxon signed-rank test adjusted for multiple comparisons (Bonferroni). Box plots represent the median and 25%/75% percentile. Whiskers indicate the minimum and maximum data points. Lines connecting CD107a- and CD107a+ cells refer to measured values of the same donor.