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Cxcr7 controls neuronal migration by regulating chemokine responsiveness
Juan Antonio Sánchez-Alcañiz1, Sammy Haege, Wiebke Mueller
1Instituto de Neurociencias, Consejo Superior Universidad Miguel Hernández, Sant Joan d'Alacant 03550, Spain.
Neuron
|January 12, 2011
Summary
Chemokine receptor Cxcr7 regulates Cxcr4 protein levels, controlling cell migration during brain development. This interaction is crucial for adapting chemokine responsiveness in migrating cells.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Chemokine (C-X-C motif) ligand 12 (Cxcl12) interacts with C-X-C chemokine receptor type 4 (Cxcr4) and C-X-C chemokine receptor type 7 (Cxcr7).
- These receptors are vital for cell migration in various biological processes, including central nervous system (CNS) development and leukocyte trafficking.
- The cooperative roles of Cxcr4 and Cxcr7 in CNS cell migration remain largely uncharacterized.
Purpose of the Study:
- To investigate the cooperative mechanisms of Cxcr4 and Cxcr7 during cortical interneuron migration in the CNS.
- To elucidate the functional relationship between Cxcr7 and Cxcr4 in regulating chemokine signaling pathways.
Main Methods:
- Utilized the migration of cortical interneurons as a model system.
- Investigated the coexpression patterns of Cxcr4 and Cxcr7 in migrating interneurons.
- Analyzed the role of Cxcr7 in chemokine signaling and its impact on Cxcr4 function.
Main Results:
- Cxcr4 and Cxcr7 are coexpressed in migrating cortical interneurons.
- Cxcr7 is essential for effective chemokine signaling.
- Cxcr7 critically modulates Cxcr4 function by regulating its protein levels, thereby controlling cell responsiveness to chemokines.
Conclusions:
- Cxcr7 plays a vital role in regulating Cxcr4 protein abundance at the cell surface.
- This Cxcr7-mediated regulation of Cxcr4 levels is crucial for adapting chemokine responsiveness during cell migration.
- The findings reveal a novel mechanism where one chemokine receptor modulates the function of another through protein level control.
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