Skip to main content

Research Repository

Advanced Search

Neuron-glia crosstalk in health and disease: fractalkine and CX3CR1 take centre stage

Sheridan, Graham K.; Murphy, Keith J.

Neuron-glia crosstalk in health and disease: fractalkine and CX3CR1 take centre stage Thumbnail


Keith J. Murphy



An essential aspect of normal brain function is the bidirectional interaction and communication between neurons and neighbouring glial cells. To this end, the brain has evolved ligand-receptor partnerships that facilitate crosstalk between different cell types. The chemokine, fractalkine (FKN), is expressed on neuronal cells, and its receptor, CX3CR1, is predominantly expressed on microglia. This review focuses on several important functional roles for FKN/CX3CR1 in both health and disease of the central nervous system. It has been posited that FKN is involved in microglial infiltration of the brain during development. Microglia, in turn, are implicated in the developmental synaptic pruning that occurs during brain maturation. The abundance of FKN on mature hippocampal neurons suggests a homeostatic non-inflammatory role in mechanisms of learning and memory. There is substantial evidence describing a role for FKN in hippocampal synaptic plasticity. FKN, on the one hand, appears to prevent excess microgli l activation in the absence of injury while promoting activation of microglia and astrocytes during inflammatory episodes. Thus, FKN appears to be neuroprotective in some settings, whereas it contributes to neuronal damage in others. Many progressive neuroinflammatory disorders that are associated with increased microglial activation, such as Alzheimer's disease, show disruption of the FKN/CX3CR1 communication system. Thus, targeting CX3CR1 receptor hyperactivation with specific antagonists in such neuroinflammatory conditions may eventually lead to novel neurotherapeutics. © 2013 The Authors.

Journal Article Type Review
Acceptance Date Nov 22, 2013
Online Publication Date Dec 1, 2013
Publication Date 2013-12
Deposit Date Aug 16, 2022
Publicly Available Date Aug 17, 2022
Journal Open Biology
Electronic ISSN 2046-2441
Publisher The Royal Society
Peer Reviewed Peer Reviewed
Volume 3
Issue 12
Article Number 130181
Public URL
Publisher URL


You might also like

Downloadable Citations