Modulating neurotoxicity through CX3CL1/CX3CR1 signaling
Cristina Limatola1, Richard M Ransohoff2
1Department of Physiology and Pharmacology, Istituto Pasteur Fondazione Cenci Bolognetti, Sapienza University of Rome Rome, Italy ; Istituto di Ricovero e Cura a Carattere Scientifico Neuromed, Istituto Neurologico Mediterraneo Pozzilli, Italy.
Frontiers in Cellular Neuroscience
|August 26, 2014
Summary
Fractalkine (CX3CL1) and its receptor (CX3CR1) mediate crucial microglia-neuron interactions. This signaling pathway influences brain development, function, and neuroprotection across various neurological diseases.
Area of Science:
- Neuroscience
- Immunology
- Molecular Biology
Background:
- Fractalkine (CX3CL1), a unique CX3C chemokine, is highly expressed on neurons.
- Its receptor, CX3CR1, is primarily found on microglial cells, suggesting a specific neuron-microglia communication axis.
- Studies using cx3cr1(GFP/GFP) mice have provided critical insights into this interaction.
Purpose of the Study:
- To review the experimental evidence for CX3CL1's role in neuroprotection.
- To survey the molecular and cellular mechanisms of CX3CL1 signaling in various brain diseases.
- To highlight the modulatory effects of CX3CL1-mediated neuron-microglia interactions on physiological and pathological processes.
Main Methods:
- Review of existing literature on fractalkine/CX3CL1 and its receptor CX3CR1.
- Analysis of experimental data from in vitro and in vivo studies, including genetically modified mouse models.
- Focus on studies investigating neuroprotection and mechanisms in neuropathologies.
Main Results:
- CX3CL1-CX3CR1 signaling modulates key neuronal activities: synaptic pruning, neuronal survival, synaptic transmission, and network maturation.
- This pathway is implicated in the development of neuropathic pain.
- CX3CL1 levels and signaling are altered in various neuropathologies, including EAE, MS, HIV infection, epilepsy, and brain tumors.
Conclusions:
- The CX3CL1-CX3CR1 axis is a critical regulator of neuron-microglia communication with significant roles in both normal brain function and disease.
- Understanding these mechanisms offers potential therapeutic targets for neuroprotection and treatment of neurological disorders.
