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Migrasome Functions

What do migrasomes do?

Current research connects migrasomes to five testable functions: local release, spatial signaling, intercellular material transfer, cellular homeostasis, and coagulation-factor delivery.

Five conceptual migrasome functions: localized secretion, a non-quantitative signaling halo, cautious cellular transfer, selective damaged-mitochondrial-material transport and local coagulation-factor participation.
  1. One fiber-attached migrasome releases a small cluster of soluble cargo into a compact local zone beside a migrating cultured cell.

    Local signal secretion

    Migrasomes can concentrate and locally release signaling molecules such as cytokines, temporarily separating the release site from the migrating cell that produced them.

    Migrasome release adds a spatial dimension to signaling and provides a tool for complex biological functions such as development.

  2. Three fiber-attached migrasomes are surrounded by a soft, unscaled coral signaling halo that fades into the local field.

    Spatial signaling centers and gradients

    Create local signaling centers that neighboring cells can read within tissues.

    When migrasomes are deposited along migration tracks, multiple release sites can shape spatial signal distributions and influence organ morphogenesis or vascular responses.

  3. Sparse RNA- and protein-like cargo travels from a donor-cell migrasome toward an uptake cup on a separate recipient cultured cell.

    Intercellular material transfer

    Pass proteins, RNA, or organelle-associated material to recipient cells.

    Migrasomes can be taken up by recipient cells and transfer cargos such as proteins and RNA in experimental models.

  4. Healthy mitochondria remain inside the donor cell while one damaged mitochondria-associated fragment enters a fiber-attached migrasome.

    Cellular homeostasis and mitocytosis

    Help migrating cells remove damaged mitochondrial material and maintain quality control.

    In mitocytosis models, damaged mitochondria-associated material can enter migrasomes and be removed from the cell with them. Damaged mitochondria are recognized by Kif5b and transported along microtubules into migrasomes through the Myo19 protein.

  5. An anucleate platelet-like research cell rests on a collagen-like matrix beside a tethered migrasome carrying a few coagulation-factor-like surface tokens.

    Coagulation-factor adsorption and delivery

    Adsorb coagulation-related proteins and participate in local coagulation responses at injury sites.

    During inflammation and infection, neutrophil-derived migrasomes increase markedly in mice and humans. They can adsorb coagulation-related proteins on their surface, localize to collagen exposed at wounds, and further recruit and activate platelets to form thrombi.