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Journal Article
Research Support, N.I.H., Extramural
Cytocapsular tubes conduct cell translocation.
Cell locomotion is essential for multicellular organism embryo development, organ homeostasis, tissue regeneration, immune responses, and tumor metastasis. Here we report that single mammalian cells can generate two extracellular membranous compartments: cytocapsulae and cytocapsular tubes. Cells migrate in cytocapsulae and engender cytocapsular tubes, which exhibit pleiotropic biological functions and provide tubular routes for directed cell transportation. Ultrastructural analysis by electron microscope revealed that nanoprotrusions surround and anchor cytocapsular tubes in place. Multiple cytocapsular tubes interconnect and form networks supporting directed cell transportation in diverse directions. Enhanced translation initiation factor eIF4E up-regulates translation of transcripts encoding proteins important for organelle development. Thus, this study proposes a mechanism of directed cell translocation in cytocapsular tubes, which may facilitate the management of diseases, including tumor metastasis.
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