Abstract
HLA-E is a ligand for the immune-inhibitory NKG2A receptor expressed on NK and T cells. To investigate HLA-E expression and immune cell infiltration in human astrocytic tumors in vivo, we analyzed normal CNS controls and astrocytomas of all WHO grades by immunohistochemistry. Both, CD8+ immune cell infiltration and HLA-E expression were significantly higher in astrocytic tumors than in normal brain. Further, HLA-E expression levels and immune cell infiltration were significantly correlated in WHO grade IV glioblastomas. Thus, HLA-E overexpression in glioblastomas may be triggered by T and NK cell infiltration.
| Original language | English |
|---|---|
| Pages (from-to) | 50-58 |
| Number of pages | 9 |
| Journal | Journal of Neuroimmunology |
| Volume | 189 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Sept 2007 |
| Externally published | Yes |
Keywords
- CD8
- Cytotoxic T cells
- HLA-E
- Human astrocytomas
- Immune escape
- NK cells