Matrix mechanics and water permeation regulate extracellular vesicle transport
Source abstract
Abstract
Cells release extracellular vesicles (EVs) to communicate over long distances, which requires EVs to traverse the extracellular matrix (ECM). However, given that the size of EVs is usually larger than the mesh size of the ECM, it is not clear how they can travel through the dense ECM. Here we show that, in contrast to synthetic nanoparticles, EVs readily transport through nanoporous ECM. Using engineered hydrogels, we demonstrate that the mechanical properties of the matrix regulate anomalous EV transport under confinement. Matrix stress relaxation allows EVs to overcome the confinement, and a higher crosslinking density facilitates a fluctuating transport motion through the polymer mesh, which leads to free diffusion and fast transport. Furthermore, water permeation through aquaporin-1 mediates the EV deformability, which further supports EV transport in hydrogels and a decellularized matrix. Our results provide evidence for the nature of EV transport within confined environments and demonstrate an unexpected dependence on matrix mechanics and water permeation.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Micro and Nano Robotics · Characterization and Applications of Magnetic Nanoparticles · Polymer Surface Interaction Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (46)
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