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Accepted (AM)Open Access (License Unspecified), Open
Journal article
Functions of the chemokine receptor CXCR4 in the central nervous system and its regulation by μ-opioid receptors
International review of neurobiology, v 118
2014
PMID: 25175863
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Activation of the G protein-coupled receptor CXCR4 by its chemokine ligand CXCL12 regulates a number of physiopathological functions in the central nervous system, during development as well as later in life. In addition to the more classical roles of the CXCL12/CXCR4 axis in the recruitment of immune cells or migration and proliferation of neural precursor cells, recent studies suggest that CXCR4 signaling also modulates synaptic function and neuronal survival in the mature brain, through direct and indirect effects on neurons and glia. These effects, which include regulation of glutamate receptors and uptake, and of dendritic spine density, can significantly alter the ability of neurons to face excitotoxic insults. Therefore, they are particularly relevant to neurodegenerative diseases featuring alterations of glutamate neurotransmission, such as HIV-associated neurocognitive disorders. Importantly, CXCR4 signaling can be dysregulated by HIV viral proteins, host HIV-induced factors, and opioids. Potential mechanisms of opioid regulation of CXCR4 include heterologous desensitization, transcriptional regulation and changes in receptor expression levels, opioid-chemokine receptor dimer or heteromer formation, and the newly described modulation by the protein ferritin heavy chain-all leading to inhibition of CXCR4 signaling. After reviewing major effects of chemokines and opioids in the CNS, this chapter discusses chemokine-opioid interactions in neuronal and immune cells, focusing on their potential contribution to HIV-associated neurocognitive disorders.
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Details
- Title
- Functions of the chemokine receptor CXCR4 in the central nervous system and its regulation by μ-opioid receptors
- Creators
- Bradley Nash - Drexel UniversityOlimpia Meucci - Drexel University
- Publication Details
- International review of neurobiology, v 118
- Publisher
- Elsevier
- Grant note
- R01 DA015014 / NIDA NIH HHS DA32444 / NIDA NIH HHS R01 DA032444 / NIDA NIH HHS DA15014 / NIDA NIH HHS
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Pharmacology and Physiology
- Web of Science ID
- WOS:000341798700005
- Scopus ID
- 2-s2.0-84906739336
- Other Identifier
- 991019169522704721
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- Web of Science research areas
- Neurosciences