Journal: Precision Clinical Medicine
Article Title: Single-cell transcriptomic profiling reveals distinct tumor microenvironments in HPV-associated penile squamous cell carcinoma
doi: 10.1093/pcmedi/pbaf013
Figure Lengend Snippet: CD8 + T cells display a lower expression of ICB checkpoints in HPV + PSCC. ( A – C ) UMAP plot of 14 693 TIL-Ts in Fig. . Each dot represents one single cell, coloured according to 11 clusters ( A ), 11 patients ( B ), and HPV status ( C ). These clusters were grouped into five cell types, including CD4 + T, PreT, CD8 + T, individual T (PT6), and proliferation T cells. Individual T cells were excluded for downstream statistical proportion analysis to reduce analytical bias. ( D ) UMAP visualization showing the classical marker gene expression to define major cell types. ( E ) Relative proportion of each cluster in 10 PSCC patients from HPV − and HPV + PSCC. ( F ) Multiplex immunofluorescence depicting the distribution of CD4 + and CD8 + T cells in HPV + and HPV − PSCC. Representative images include DAPI + nuclei for reference. Scale bar: 200 μm. ( G ) Quantification of CD4 + and CD8 + T cells per area between HPV + and HPV − PSCC ( n = 3). GSEA showing pathways significantly enriched in HPV − PSCC ( H, I ) or HPV + PSCC ( J, K ). Violin plot showing the expression of cytokine ( L ) or immune checkpoint ( M ) in CD8 + T cells by HPV status. Statistical analysis was performed using a two-sided unpaired Student's t -test for (G) and a Wilcoxon rank sum test for (L) and (M). Data are presented as mean ± SEM, with significance levels indicated as follows: ns: not significant, * P < 0.05. ICB: Immune checkpoint blockade.
Article Snippet: For IF staining, FFPE tissue slices were treated the same as for IHC staining, then incubated with mixed primary antibodies overnight (mouse anti-human CD4 antibody ZsBio ZM-0418; mouse anti-human CD8 antibody, Servicebio GB12068; HPV E7 antibody, Abcam ab308296; HPV E6 antibody Santa cruz sc460), incubated with fluorescein-conjugated secondary antibodies, and finally counterstained with DNA dye DAPI (4′,6-diamidino-2-phenylindole), mounted with anti-fading mounting medium, and stored at 4 °C in the dark until imaging.
Techniques: Expressing, Marker, Gene Expression, Multiplex Assay, Immunofluorescence