A spinal microglia population involved in remitting and relapsing neuropathic pain

Keita Kohno, Ryoji Shirasaka, Kohei Yoshihara, Satsuki Mikuriya, Kaori Tanaka, Keiko Takanami, Kazuhide Inoue, Hirotaka Sakamoto, Yasuyuki Ohkawa, Takahiro Masuda, Makoto Tsuda

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Neuropathic pain is often caused by injury and diseases that affect the somatosensory system. Although pain development has been well studied, pain recovery mechanisms remain largely unknown. Here, we found that CD11c-expressing spinal microglia appear after the development of behavioral pain hypersensitivity following nerve injury. Nerve-injured mice with spinal CD11c+ microglial depletion failed to recover spontaneously from this hypersensitivity. CD11c+ microglia expressed insulin-like growth factor-1 (IGF1), and interference with IGF1 signaling recapitulated the impairment in pain recovery. In pain-recovered mice, the depletion of CD11c+ microglia or the interruption of IGF1 signaling resulted in a relapse in pain hypersensitivity. Our findings reveal a mechanism for the remission and recurrence of neuropathic pain, providing potential targets for therapeutic strategies.

Original languageEnglish
Pages (from-to)86-90
Number of pages5
JournalScience
Volume376
Issue number6588
DOIs
Publication statusPublished - Apr 1 2022

ASJC Scopus subject areas

  • General

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