Fig. 7

Immunofluorescence validation of keratinocyte immune activation and NK cell exhaustion during acne progression. (A) Immunofluorescence staining of KRT6A and NKG7 in NC, MA, and SA skin tissues. Scale bar, 50 μm. (B) Quantitative analysis of KRT6A fluorescence intensity across groups. (C) Quantitative analysis of NKG7 fluorescence intensity in each group. (Data are expressed as mean ± standard deviation, n = 3, *p < 0.05, **p < 0.01).