Lymphatic exosomes promote dendritic cell migration along guidance cues
Author(s) -
Markus Brown,
Louise A. Johnson,
Dario A. Leone,
Peter Májek,
Kari Vaahtomeri,
Daniel Senfter,
Nora Bukosza,
Helga Schachner,
Gabriele Asfour,
Brigitte Langer,
Robert Hauschild,
Katja Parapatics,
YoungKwon Hong,
Keiryn L. Bennett,
Renate Kain,
Michael Detmar,
Michael Sixt,
David G. Jackson,
Dontscho Kerjaschki
Publication year - 2018
Publication title -
the journal of cell biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.414
H-Index - 380
eISSN - 1540-8140
pISSN - 0021-9525
DOI - 10.1083/jcb.201612051
Subject(s) - microvesicles , lymphatic system , microbiology and biotechnology , dendritic cell , biology , immunology , microrna , immune system , genetics , gene
Lymphatic endothelial cells (LECs) release extracellular chemokines to guide the migration of dendritic cells. In this study, we report that LECs also release basolateral exosome-rich endothelial vesicles (EEVs) that are secreted in greater numbers in the presence of inflammatory cytokines and accumulate in the perivascular stroma of small lymphatic vessels in human chronic inflammatory diseases. Proteomic analyses of EEV fractions identified >1,700 cargo proteins and revealed a dominant motility-promoting protein signature. In vitro and ex vivo EEV fractions augmented cellular protrusion formation in a CX3CL1/fractalkine-dependent fashion and enhanced the directional migratory response of human dendritic cells along guidance cues. We conclude that perilymphatic LEC exosomes enhance exploratory behavior and thus promote directional migration of CX3CR1-expressing cells in complex tissue environments.
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