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Glial activation: a driving force for pathological pain.

L R Watkins¹, E D Milligan, S F Maier

¹Dept of Psychology & the Center for Neurosciences, University of Colorado at, Boulder, CO, USA. lwatkins@psych.colorado.edu

Trends in Neurosciences

|July 31, 2001

Summary

Spinal cord glia, including microglia and astrocytes, amplify pain by releasing inflammatory cytokines, challenging the neuron-centric view of pain. This discovery necessitates novel pain control strategies targeting glial cells, not just neurons.

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Area of Science:

Neuroscience
Immunology
Pain Research

Background:

Traditionally, pain perception is attributed solely to neuronal activity.
Sensory phenomena, including pain, have been understood through a neuron-centric model.

Purpose of the Study:

To investigate the role of spinal cord glia in pain amplification.
To challenge the classical view of pain mediation by neurons.

Main Methods:

The study focuses on the activation of spinal cord glia (microglia and astrocytes).
It examines the release of proinflammatory cytokines by glia in response to stimuli.

Main Results:

Spinal cord glia, similar to immune cells, release proinflammatory cytokines when activated by pathogens or peripheral sensory signals.

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This glial activation leads to the development of pathological pain.

Glial cells amplify pain signals, indicating a significant role beyond neuronal function.

Conclusions:

The classical view of pain mediation requires revision to include the significant role of spinal cord glia.
New pain control strategies should consider targeting glial function, offering a novel therapeutic approach.
Understanding glial contributions to pain opens avenues for developing treatments distinct from current neuron-focused therapies.