Publikation: Opposite Fate of Endocytosed CCR7 and Its Ligands : Recycling versus Degradation
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2006
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The Journal of Immunology. 2006, 177(4), pp. 2314-2323. ISSN 0022-1767. eISSN 1550-6606. Available under: doi: 10.4049/jimmunol.177.4.2314
Zusammenfassung
The chemokine receptor CCR7 and its ligands CCL19 and CCL21 play a crucial role for the homing of lymphocytes and dendritic cells to secondary lymphoid tissues. Nevertheless, how CCR7 senses the gradient of chemokines and how migration is terminated are poorly understood. In this study, we demonstrate that CCR7(-GFP) is endocytosed into early endosomes containing transferrin receptor upon CCL19 binding, but less upon CCL21 triggering. Internalization of CCR7 was independent of lipid rafts but relied on dynamin and Eps15 and was inhibited by hypertonic sucrose, suggesting clathrin-dependent endocytosis. After chemokine removal, internalized CCR7 recycled back to the plasma membrane and was able to mediate migration again. In contrast, internalized CCL19 was sorted to lysosomes for degradation, showing opposite fate for endocytosed CCR7 and its ligand.
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570 Biowissenschaften, Biologie
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OTERO, Carolina, Marcus GRÖTTRUP, Daniel F. LEGLER, 2006. Opposite Fate of Endocytosed CCR7 and Its Ligands : Recycling versus Degradation. In: The Journal of Immunology. 2006, 177(4), pp. 2314-2323. ISSN 0022-1767. eISSN 1550-6606. Available under: doi: 10.4049/jimmunol.177.4.2314BibTex
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year={2006},
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title={Opposite Fate of Endocytosed CCR7 and Its Ligands : Recycling versus Degradation},
number={4},
volume={177},
issn={0022-1767},
journal={The Journal of Immunology},
pages={2314--2323},
author={Otero, Carolina and Gröttrup, Marcus and Legler, Daniel F.}
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<dcterms:abstract xml:lang="eng">The chemokine receptor CCR7 and its ligands CCL19 and CCL21 play a crucial role for the homing of lymphocytes and dendritic cells to secondary lymphoid tissues. Nevertheless, how CCR7 senses the gradient of chemokines and how migration is terminated are poorly understood. In this study, we demonstrate that CCR7(-GFP) is endocytosed into early endosomes containing transferrin receptor upon CCL19 binding, but less upon CCL21 triggering. Internalization of CCR7 was independent of lipid rafts but relied on dynamin and Eps15 and was inhibited by hypertonic sucrose, suggesting clathrin-dependent endocytosis. After chemokine removal, internalized CCR7 recycled back to the plasma membrane and was able to mediate migration again. In contrast, internalized CCL19 was sorted to lysosomes for degradation, showing opposite fate for endocytosed CCR7 and its ligand.</dcterms:abstract>
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