ArticlebioRxiv : the preprint server for biology2025
Matrix viscoelasticity regulates dendritic cell migration and immune priming.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The tumor microenvironment shapes immune surveillance through its mechanical properties, yet the role of matrix viscoelasticity remains unclear. Here, we used a collagen system with tunable viscoelasticity to define how matrix relaxation directs dendritic cell (DC) behavior. Elastic matrices impaired DC migration by limiting actomyosin-driven collagen remodeling, thereby reducing DC-T cell encounters and weakening T cell priming, activation, proliferation, and tumor killing. Blocking DC migration in fast-relaxing gels recapitulated key aspects of the impaired T cell priming seen in elastic matrices. Prolonged confinement in elastic extracellular matrix induced a mechanomemory state, locking DCs into reduced motility even after transfer to viscoelastic environments, corresponding to altered chromatin accessibility. Finally, studies with patient-derived ependymoma samples confirmed these findings, identifying viscoelasticity as a barrier to antitumor immunity with implications for therapeutic intervention.
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