A tailored fit: How intermediate filaments orchestrate glioblastoma invasion.

Glioblastoma (GBM) is a highly invasive tumour. Invasion of GBM cells into the densely packed brain parenchyma reflects a profound mechanobiological adaptation to the mechanical constraints of the brain. A recent study by van Bodegraven et al. (https://doi.org/10.1016/j.celrep.2025.116553) positions intermediate filaments as central regulators of this mechanoadaptive response. The intermediate filament perinuclear cage decreases the deformability of the cell and therewith the deformability of the nucleus. Despite of this, the presence of intermediate filaments leads to a greater invasive capacity due to mechanosensitive upregulation of metalloproteinase 14 and increased extracellular matrix degradation. The enrichment of intermediate filament transcripts in GBM patient cells with pro-invasive markers indicates that intermediate filaments contribute to the specialization of GBM cells towards invasive behavior. This work fits within an emerging paradigm in which intermediate filament expression is viewed as being tailored to the mechanical demands of the invading cell.