cellular_immunity
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| + | ==== PDL1 Expression by Squamous Epithelium (Tonsil) protecting itself within a cryptitis ==== | ||
| + | At low magnification (Left), one sees the heterogeneous expression of PDL1 in a tonsil which is used as a preferred positive on-slide control for PDL1. This expression is explained by a focal invasion of T cells reaching an infectious area (Center: DAB: CD3, RED: Cytokeratin). The T cells release Interferon-Gamma which stimulates local expression of PDL1 by the epithelium. The right picture shows PDL1 expression at higher magnification. | ||
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cellular_immunity.1675955775.txt.gz · Last modified: 2025/02/01 17:00 (external edit)