Abstract
Activation of microglia in the spinal cord dorsal horn after peripheral nerve injury contributes to the development of pain hypersensitivity. How activated microglia selectively enhance the activity of spinal nociceptive circuits is not well understood. We discovered that after peripheral nerve injury, microglia degrade extracellular matrix structures, perineuronal nets (PNNs), in lamina I of the spinal cord dorsal horn. Lamina I PNNs selectively enwrap spinoparabrachial projection neurons, which integrate nociceptive information in the spinal cord and convey it to supraspinal brain regions to induce pain sensation. Degradation of PNNs by microglia enhances the activity of projection neurons and induces pain-related behaviors. Thus, nerve injury–induced degradation of PNNs is a mechanism by which microglia selectively augment the output of spinal nociceptive circuits and cause pain hypersensitivity.
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References
45
[20]
A. A. Staniland, A. K. Clark, R. Wodarski, O. Sasso, F. Maione, F. D’Acquisto, M. Malcangio, Reduced inflammatory and neuropathic pain and decreased spinal microglial response in fractalkine receptor (CX3CR1) knockout mice. J. Neurochem. 114, 1143–1157 (2010). 20524966 10.1111/j.1471-4159.2010.06837.x
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176
Citations
45
References
Details
Published
Jul 01, 2022
Vol/Issue
377(6601)
Pages
80-86
Authors
Cite This Article
Shannon Tansley, Ning Gu, Alba Ureña Guzmán, et al. (2022). Microglia-mediated degradation of perineuronal nets promotes pain. Science, 377(6601), 80-86. https://doi.org/10.1126/science.abl6773
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