Cytokine Modulation of Synaptic Plasticity in the Central Nervous System

Synaptic plasticity in the central nervous system underpins learning, memory and adaptive responses to experience. Cytokines, small secreted peptides traditionally associated with immune regulation, have emerged as critical modulators of neuronal connectivity. Under normal conditions, low concentrations of interleukin-1β, tumour-necrosis factor-α and interleukin-6 support long-term potentiation, dendritic spine growth and neurotransmitter receptor trafficking. By contrast, excessive or sustained cytokine signalling—as seen in infection, trauma or neurodegenerative disease—impairs glutamate release, destabilises actin dynamics in spines and disrupts receptor surface expression. Intracellular cascades such as p38 MAPK, NF-κB and ceramide/Src transduction translate cytokine binding into functional changes at the synapse. The bidirectional interplay between immune status and synaptic strength has broad implications for cognitive health, offering a mechanistic link between inflammation and disorders ranging from Alzheimer’s disease to mood disturbances. Targeted modulation of specific cytokine pathways is now a focus of translational research aimed at restoring synaptic function and resilience in pathological states.

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Cytokine Modulation of Synaptic Plasticity in the Central Nervous System publication trend

The graph below shows the total number of articles in cytokine modulation of synaptic plasticity in the central nervous system across all publications each year (not limited to Nature Index journals).

Technical terms

Cytokine: Small protein released by immune and glial cells that signals through specific receptors to regulate inflammation and cell function.

Synaptic plasticity: The ability of synapses to alter their strength in response to activity, underpinning learning and memory.

Microglia: Resident immune cells of the CNS that secrete and respond to cytokines and participate in synaptic remodelling.

Long-term potentiation (LTP): A sustained increase in synaptic efficacy following high-frequency stimulation, used as a model for learning.

Blood-brain barrier (BBB): A specialised endothelial interface that regulates movement of molecules and cells between the bloodstream and the CNS.

References

1. Molecular Mechanisms Underlying Neuroinflammation Elicited by Occupational Injuries and Toxicants. International Journal of Molecular Sciences (2023).
2. Targeting Cytokine-Mediated Inflammation in Brain Disorders: Developing New Treatment Strategies. Pharmaceuticals (2025).
3. The role of cytokines in modulating learning and memory and brain plasticity. Brain and Neuroscience Advances (2020).
4. Activation of p38 Plays a Pivotal Role in the Inhibitory Effect of Lipopolysaccharide and Interleukin-1β on Long Term Potentiation in Rat Dentate Gyrus*. Journal of Biological Chemistry (2003).
5. IL-1β suppresses cLTP-induced surface expression of GluA1 and actin polymerization via ceramide-mediated Src activation. Journal of Neuroinflammation (2018).