Abstract
The mesenchymal subtype of glioblastoma is thought to be determined by both cancer cell-intrinsic alterations and extrinsic cellular interactions, but remains poorly understood. Here, we dissect glioblastoma-to-microenvironment interactions by single-cell RNA sequencing analysis of human tumors and model systems, combined with functional experiments. We demonstrate that macrophages induce a transition of glioblastoma cells into mesenchymal-like (MES-like) states. This effect is mediated, both in vitro and in vivo, by macrophage-derived oncostatin M (OSM) that interacts with its receptors (OSMR or LIFR) in complex with GP130 on glioblastoma cells and activates STAT3. We show that MES-like glioblastoma states are also associated with increased expression of a mesenchymal program in macrophages and with increased cytotoxicity of T cells, highlighting extensive alterations of the immune microenvironment with potential therapeutic implications.
| Original language | English |
|---|---|
| Pages (from-to) | 779-792.e11 |
| Journal | Cancer Cell |
| Volume | 39 |
| Issue number | 6 |
| DOIs | |
| State | Published - 14 Jun 2021 |
Keywords
- GBM
- OSM
- glioblastoma
- macrophage
- mesenchymal
- scRNA-seq
- tumor microenvironment
All Science Journal Classification (ASJC) codes
- Oncology
- Cancer Research