Axonal degeneration in dorsal columns of spinal cord does not induce recruitment of hematogenous macrophages

Gang Zhang, Paul N. Hoffman, Kazim A. Sheikh

Research output: Contribution to journalArticlepeer-review

Abstract

It is generally accepted that there are two populations of macrophages that respond to neural injuries and successful recruitment of hematogenous macrophages has been shown to help the process of nerve repair in the peripheral nervous system (PNS). Meanwhile, the recruitment of circulating macrophages after central nerve system (CNS) injuries is considered mild and delayed. We compared the recruitment of circulating macrophages in the peripheral nerves and spinal cord after dorsal root ganglionectomies, which induce selective and approximately similar extent of sensory fiber degeneration in PNS and CNS, in bone marrow chimeric mice. Our results showed that circulating macrophages were efficiently recruited in PNS but virtually no recruitment in CNS despite degeneration of peripheral and central sensory projections emanating from the same dorsal root ganglion (DRG) neurons. The mechanisms that prevent recruitment of circulating macrophages in CNS after injury remain poorly elucidated.

Original languageEnglish (US)
Pages (from-to)57-62
Number of pages6
JournalExperimental Neurology
Volume252
DOIs
StatePublished - Feb 1 2014

Keywords

  • Axonal degeneration
  • Bone marrow chimeric mice
  • CNS
  • Chemokine
  • Cytokines
  • Dorsal root ganglionectomy
  • Hematogenous macrophage recruitment
  • PNS

ASJC Scopus subject areas

  • Neurology
  • Developmental Neuroscience

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