Journal
PAIN REPORTS
Volume 6, Issue 1, Pages -Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/PR9.0000000000000883
Keywords
Neuropathic pain; microglia; macrophage; spinal cord; dorsal root ganglion
Categories
Funding
- Foundation for Anesthesia Education and Research
- UCSF Department of Anesthesia and Perioperative Care
- NIH [R35 NS097306, NS R01 NS100801]
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Molecular and cellular interactions between spinal dorsal horn neurons and microglia, as well as reciprocal interactions between macrophages and nociceptive sensory neurons in the dorsal root ganglion, play important roles in the induction and maintenance of neuropathic pain. Understanding the signaling mechanisms involving colony-stimulating factor 1 (CSF1) and its receptor (CSF1R) in microglia and macrophages could provide insights into the generation of neuropathic pain.
Molecular and cellular interactions among spinal dorsal horn neurons and microglia, the resident macrophages of the central nervous system, contribute to the induction and maintenance of neuropathic pain after peripheral nerve injury. Emerging evidence also demonstrates that reciprocal interactions between macrophages and nociceptive sensory neurons in the dorsal root ganglion contribute to the initiation and persistence of nerve injury-induced mechanical hypersensitivity (allodynia). We previously reported that sensory neuron-derived colony-stimulating factor 1 (CSF1), by engaging the CSF1 receptor (CSF1R) that is expressed by both microglia and macrophages, triggers the nerve injury-induced expansion of both resident microglia in the spinal cord and macrophages in the dorsal root ganglion and induces their respective contributions to the neuropathic pain phenotype. Here, we review recent research and discuss unanswered questions regarding CSF1/CSF1R-mediated microglial and macrophage signaling in the generation of neuropathic pain.
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